1 Changes in version 0.4.6.6 - 2021-06-30
2 Tor 0.4.6.6 makes several small fixes on 0.4.6.5, including one that
3 allows Tor to build correctly on older versions of GCC. You should
4 upgrade to this version if you were having trouble building Tor
5 0.4.6.5; otherwise, there is probably no need.
7 o Minor bugfixes (compilation):
8 - Fix a compilation error when trying to build Tor with a compiler
9 that does not support const variables in static initializers.
10 Fixes bug 40410; bugfix on 0.4.6.5.
11 - Suppress a strict-prototype warning when building with some
12 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
14 o Minor bugfixes (testing):
15 - Enable the deterministic RNG for unit tests that covers the
16 address set bloomfilter-based API's. Fixes bug 40419; bugfix
20 Changes in version 0.4.6.5 - 2021-06-14
21 Tor 0.4.6.5 is the first stable release in its series. The 0.4.6.x
22 series includes numerous features and bugfixes, including a significant
23 improvement to our circuit timeout algorithm that should improve
24 observed client performance, and a way for relays to report when they are
27 This release also includes security fixes for several security issues,
28 including a denial-of-service attack against onion service clients,
29 and another denial-of-service attack against relays. Everybody should
30 upgrade to one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
32 Below are the changes since 0.4.6.4-rc. For a complete list of changes
33 since 0.4.5.8, see the ReleaseNotes file.
35 o Major bugfixes (security):
36 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
37 half-closed streams. Previously, clients failed to validate which
38 hop sent these cells: this would allow a relay on a circuit to end
39 a stream that wasn't actually built with it. Fixes bug 40389;
40 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
41 003 and CVE-2021-34548.
43 o Major bugfixes (security, defense-in-depth):
44 - Detect more failure conditions from the OpenSSL RNG code.
45 Previously, we would detect errors from a missing RNG
46 implementation, but not failures from the RNG code itself.
47 Fortunately, it appears those failures do not happen in practice
48 when Tor is using OpenSSL's default RNG implementation. Fixes bug
49 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
50 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
52 o Major bugfixes (security, denial of service):
53 - Resist a hashtable-based CPU denial-of-service attack against
54 relays. Previously we used a naive unkeyed hash function to look
55 up circuits in a circuitmux object. An attacker could exploit this
56 to construct circuits with chosen circuit IDs, to create
57 collisions and make the hash table inefficient. Now we use a
58 SipHash construction here instead. Fixes bug 40391; bugfix on
59 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
60 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
61 - Fix an out-of-bounds memory access in v3 onion service descriptor
62 parsing. An attacker could exploit this bug by crafting an onion
63 service descriptor that would crash any client that tried to visit
64 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
65 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
66 Glazunov from Google's Project Zero.
68 o Minor features (geoip data):
69 - Update the geoip files to match the IPFire Location Database, as
70 retrieved on 2021/06/10.
72 o Minor features (logging, diagnostic):
73 - Log decompression failures at a higher severity level, since they
74 can help provide missing context for other warning messages. We
75 rate-limit these messages, to avoid flooding the logs if they
76 begin to occur frequently. Closes ticket 40175.
79 Changes in version 0.4.6.4-rc - 2021-05-28
80 Tor 0.4.6.4-rc fixes a few bugs from previous releases. This, we hope,
81 the final release candidate in its series: unless major new issues are
82 found, the next release will be stable.
84 o Minor features (compatibility):
85 - Remove an assertion function related to TLS renegotiation. It was
86 used nowhere outside the unit tests, and it was breaking
87 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
90 o Minor bugfixes (consensus handling):
91 - Avoid a set of bugs that could be caused by inconsistently
92 preferring an out-of-date consensus stored in a stale directory
93 cache over a more recent one stored on disk as the latest
94 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
96 o Minor bugfixes (control, sandbox):
97 - Allow the control command SAVECONF to succeed when the seccomp
98 sandbox is enabled, and make SAVECONF keep only one backup file to
99 simplify implementation. Previously SAVECONF allowed a large
100 number of backup files, which made it incompatible with the
101 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
104 o Minor bugfixes (metrics port):
105 - Fix a bug that made tor try to re-bind() on an already open
106 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
110 - Remove unneeded code for parsing private keys in directory
111 documents. This code was only used for client authentication in v2
112 onion services, which are now unsupported. Closes ticket 40374.
115 Changes in version 0.4.5.8 - 2021-05-10
116 Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes
117 from the 0.4.6.x series.
119 o Minor features (compatibility, Linux seccomp sandbox, backport from 0.4.6.3-rc):
120 - Add a workaround to enable the Linux sandbox to work correctly
121 with Glibc 2.33. This version of Glibc has started using the
122 fstatat() system call, which previously our sandbox did not allow.
123 Closes ticket 40382; see the ticket for a discussion of trade-offs.
125 o Minor features (compilation, backport from 0.4.6.3-rc):
126 - Make the autoconf script build correctly with autoconf versions
127 2.70 and later. Closes part of ticket 40335.
129 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
130 - Regenerate the list of fallback directories to contain a new set
131 of 200 relays. Closes ticket 40265.
133 o Minor features (geoip data):
134 - Update the geoip files to match the IPFire Location Database, as
135 retrieved on 2021/05/07.
137 o Minor features (onion services):
138 - Add warning message when connecting to now deprecated v2 onion
139 services. As announced, Tor 0.4.5.x is the last series that will
140 support v2 onions. Closes ticket 40373.
142 o Minor bugfixes (bridge, pluggable transport, backport from 0.4.6.2-alpha):
143 - Fix a regression that made it impossible start Tor using a bridge
144 line with a transport name and no fingerprint. Fixes bug 40360;
145 bugfix on 0.4.5.4-rc.
147 o Minor bugfixes (build, cross-compilation, backport from 0.4.6.3-rc):
148 - Allow a custom "ar" for cross-compilation. Our previous build
149 script had used the $AR environment variable in most places, but
150 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
152 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
153 - Fix a non-fatal BUG() message due to a too-early free of a string,
154 when listing a client connection from the DoS defenses subsystem.
155 Fixes bug 40345; bugfix on 0.4.3.4-rc.
157 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
158 - Fix an indentation problem that led to a warning from GCC 11.1.1.
159 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
161 o Minor bugfixes (controller, backport from 0.4.6.1-alpha):
162 - Fix a "BUG" warning that would appear when a controller chooses
163 the first hop for a circuit, and that circuit completes. Fixes bug
164 40285; bugfix on 0.3.2.1-alpha.
166 o Minor bugfixes (onion service, client, memory leak, backport from 0.4.6.3-rc):
167 - Fix a bug where an expired cached descriptor could get overwritten
168 with a new one without freeing it, leading to a memory leak. Fixes
169 bug 40356; bugfix on 0.3.5.1-alpha.
171 o Minor bugfixes (testing, BSD, backport from 0.4.6.2-alpha):
172 - Fix pattern-matching errors when patterns expand to invalid paths
173 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
177 Changes in version 0.4.6.3-rc - 2021-05-10
178 Tor 0.4.6.3-rc is the first release candidate in its series. It fixes
179 a few small bugs from previous versions, and adds a better error
180 message when trying to use (no longer supported) v2 onion services.
182 Though we anticipate that we'll be doing a bit more clean-up between
183 now and the stable release, we expect that our remaining changes will
184 be fairly simple. There will likely be at least one more release
185 candidate before 0.4.6.x is stable.
187 o Major bugfixes (onion service, control port):
188 - Make the ADD_ONION command properly configure client authorization.
189 Before this fix, the created onion failed to add the client(s).
190 Fixes bug 40378; bugfix on 0.4.6.1-alpha.
192 o Minor features (compatibility, Linux seccomp sandbox):
193 - Add a workaround to enable the Linux sandbox to work correctly
194 with Glibc 2.33. This version of Glibc has started using the
195 fstatat() system call, which previously our sandbox did not allow.
196 Closes ticket 40382; see the ticket for a discussion of trade-offs.
198 o Minor features (compilation):
199 - Make the autoconf script build correctly with autoconf versions
200 2.70 and later. Closes part of ticket 40335.
202 o Minor features (geoip data):
203 - Update the geoip files to match the IPFire Location Database, as
204 retrieved on 2021/05/07.
206 o Minor features (onion services):
207 - Add a warning message when trying to connect to (no longer
208 supported) v2 onion services. Closes ticket 40373.
210 o Minor bugfixes (build, cross-compilation):
211 - Allow a custom "ar" for cross-compilation. Our previous build
212 script had used the $AR environment variable in most places, but
213 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
215 o Minor bugfixes (compiler warnings):
216 - Fix an indentation problem that led to a warning from GCC 11.1.1.
217 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
219 o Minor bugfixes (logging, relay):
220 - Emit a warning if an Address is found to be internal and tor can't
221 use it. Fixes bug 40290; bugfix on 0.4.5.1-alpha.
223 o Minor bugfixes (onion service, client, memory leak):
224 - Fix a bug where an expired cached descriptor could get overwritten
225 with a new one without freeing it, leading to a memory leak. Fixes
226 bug 40356; bugfix on 0.3.5.1-alpha.
229 Changes in version 0.4.6.2-alpha - 2021-04-15
230 Tor 0.4.6.2-alpha is the second alpha in its series. It fixes several
231 small bugs in previous releases, and solves other issues that had
232 enabled denial-of-service attacks and affected integration with
235 o Minor features (client):
236 - Clients now check whether their streams are attempting to re-enter
237 the Tor network (i.e. to send Tor traffic over Tor), and close
238 them preemptively if they think exit relays will refuse them for
239 this reason. See ticket 2667 for details. Closes ticket 40271.
241 o Minor features (command line):
242 - Add long format name "--torrc-file" equivalent to the existing
243 command-line option "-f". Closes ticket 40324. Patch by
246 o Minor features (dormant mode):
247 - Add a new 'DormantTimeoutEnabled' option to allow coarse-grained
248 control over whether the client ever becomes dormant from
249 inactivity. Most people won't need this. Closes ticket 40228.
251 o Minor features (fallback directory list):
252 - Regenerate the list of fallback directories to contain a new set
253 of 200 relays. Closes ticket 40265.
255 o Minor features (geoip data):
256 - Update the geoip files to match the IPFire Location Database, as
257 retrieved on 2021/04/13.
259 o Minor features (logging):
260 - Edit heartbeat log messages so that more of them begin with the
261 string "Heartbeat: ". Closes ticket 40322; patch
264 o Minor bugfixes (bridge, pluggable transport):
265 - Fix a regression that made it impossible start Tor using a bridge
266 line with a transport name and no fingerprint. Fixes bug 40360;
267 bugfix on 0.4.5.4-rc.
269 o Minor bugfixes (channel, DoS):
270 - Fix a non-fatal BUG() message due to a too-early free of a string,
271 when listing a client connection from the DoS defenses subsystem.
272 Fixes bug 40345; bugfix on 0.4.3.4-rc.
274 o Minor bugfixes (compilation):
275 - Fix a compilation warning about unused functions when building
276 with a libc that lacks the GLOB_ALTDIRFUNC constant. Fixes bug
277 40354; bugfix on 0.4.5.1-alpha. Patch by Daniel Pinto.
279 o Minor bugfixes (configuration):
280 - Fix pattern-matching for directories on all platforms when using
281 %include options in configuration files. This patch also fixes
282 compilation on musl libc based systems. Fixes bug 40141; bugfix
285 o Minor bugfixes (relay):
286 - Move the "overload-general" line from extrainfo to the server
287 descriptor. Fixes bug 40364; bugfix on 0.4.6.1-alpha.
289 o Minor bugfixes (testing, BSD):
290 - Fix pattern-matching errors when patterns expand to invalid paths
291 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
294 o Documentation (manual):
295 - Move the ServerTransport* options to the "SERVER OPTIONS" section.
297 - Indicate that the HiddenServiceStatistics option also applies to
298 bridges. Closes ticket 40346.
299 - Move the description of BridgeRecordUsageByCountry to the section
300 "STATISTICS OPTIONS". Closes ticket 40323.
303 Changes in version 0.4.6.1-alpha - 2021-03-18
304 Tor 0.4.6.1-alpha is the first alpha release in the 0.4.6.x series. It
305 improves client circuit performance, adds missing features, and
306 improves some of our DoS handling and statistics reporting. It also
307 includes numerous smaller bugfixes.
309 Below are the changes since 0.4.5.7. (Note that this release DOES
310 include the fixes for the security bugs already fixed in 0.4.5.7.)
312 o Major features (control port, onion services):
313 - Add controller support for creating version 3 onion services with
314 client authorization. Previously, only v2 onion services could be
315 created with client authorization. Closes ticket 40084. Patch by
318 o Major features (directory authority):
319 - When voting on a relay with a Sybil-like appearance, add the Sybil
320 flag when clearing out the other flags. This lets a relay operator
321 know why their relay hasn't been included in the consensus. Closes
322 ticket 40255. Patch by Neel Chauhan.
324 o Major features (metrics):
325 - Relays now report how overloaded they are in their extrainfo
326 documents. This information is controlled with the
327 OverloadStatistics torrc option, and it will be used to improve
328 decisions about the network's load balancing. Implements proposal
329 328; closes ticket 40222.
331 o Major features (relay, denial of service):
332 - Add a new DoS subsystem feature to control the rate of client
333 connections for relays. Closes ticket 40253.
335 o Major features (statistics):
336 - Relays now publish statistics about the number of v3 onion
337 services and volume of v3 onion service traffic, in the same
338 manner they already do for v2 onions. Closes ticket 23126.
340 o Major bugfixes (circuit build timeout):
341 - Improve the accuracy of our circuit build timeout calculation for
342 60%, 70%, and 80% build rates for various guard choices. We now
343 use a maximum likelihood estimator for Pareto parameters of the
344 circuit build time distribution, instead of a "right-censored
345 estimator". This causes clients to ignore circuits that never
346 finish building in their timeout calculations. Previously, clients
347 were counting such unfinished circuits as having the highest
348 possible build time value, when in reality these circuits most
349 likely just contain relays that are offline. We also now wait a
350 bit longer to let circuits complete for measurement purposes,
351 lower the minimum possible effective timeout from 1.5 seconds to
352 10ms, and increase the resolution of the circuit build time
353 histogram from 50ms bin widths to 10ms bin widths. Additionally,
354 we alter our estimate Xm by taking the maximum of the top 10 most
355 common build time values of the 10ms histogram, and compute Xm as
356 the average of these. Fixes bug 40168; bugfix on 0.2.2.14-alpha.
357 - Remove max_time calculation and associated warning from circuit
358 build timeout 'alpha' parameter estimation, as this is no longer
359 needed by our new estimator from 40168. Fixes bug 34088; bugfix
362 o Major bugfixes (signing key):
363 - In the tor-gencert utility, give an informative error message if
364 the passphrase given in `--create-identity-key` is too short.
365 Fixes bug 40189; bugfix on 0.2.0.1-alpha. Patch by Neel Chauhan.
367 o Minor features (bridge):
368 - We now announce the URL to Tor's new bridge status at
369 https://bridges.torproject.org/ when Tor is configured to run as a
370 bridge relay. Closes ticket 30477.
372 o Minor features (build system):
373 - New "make lsp" command to auto generate the compile_commands.json
374 file used by the ccls server. The "bear" program is needed for
375 this. Closes ticket 40227.
377 o Minor features (command-line interface):
378 - Add build informations to `tor --version` in order to ease
379 reproducible builds. Closes ticket 32102.
380 - When parsing command-line flags that take an optional argument,
381 treat the argument as absent if it would start with a '-'
382 character. Arguments in that form are not intelligible for any of
383 our optional-argument flags. Closes ticket 40223.
384 - Allow a relay operator to list the ed25519 keys on the command
385 line by adding the `rsa` and `ed25519` arguments to the
386 --list-fingerprint flag to show the respective RSA and ed25519
387 relay fingerprint. Closes ticket 33632. Patch by Neel Chauhan.
389 o Minor features (control port, stream handling):
390 - Add the stream ID to the event line in the ADDRMAP control event.
391 Closes ticket 40249. Patch by Neel Chauhan.
393 o Minor features (dormant mode):
394 - Add a new 'DormantTimeoutEnabled' option for coarse-grained
395 control over whether the client can become dormant from
396 inactivity. Most people won't need this. Closes ticket 40228.
398 o Minor features (logging):
399 - Change the DoS subsystem heartbeat line format to be more clear on
400 what has been detected/rejected, and which option is disabled (if
401 any). Closes ticket 40308.
402 - In src/core/mainloop/mainloop.c and src/core/mainloop/connection.c,
403 put brackets around IPv6 addresses in log messages. Closes ticket
404 40232. Patch by Neel Chauhan.
406 o Minor features (performance, windows):
407 - Use SRWLocks to implement locking on Windows. Replaces the
408 "critical section" locking implementation with the faster
409 SRWLocks, available since Windows Vista. Closes ticket 17927.
410 Patch by Daniel Pinto.
412 o Minor features (protocol, proxy support, defense in depth):
413 - Close HAProxy connections if they somehow manage to send us data
414 before we start reading. Closes another case of ticket 40017.
416 o Minor features (tests, portability):
417 - Port the hs_build_address.py test script to work with recent
418 versions of python. Closes ticket 40213. Patch from
421 o Minor features (vote document):
422 - Add a "stats" line to directory authority votes, to report various
423 statistics that authorities compute about the relays. This will
424 help us diagnose the network better. Closes ticket 40314.
426 o Minor bugfixes (build):
427 - The configure script now shows whether or not lzma and zstd have
428 been used, not just if the enable flag was passed in. Fixes bug
429 40236; bugfix on 0.4.3.1-alpha.
431 o Minor bugfixes (compatibility):
432 - Fix a failure in the test cases when running on the "hppa"
433 architecture, along with a related test that might fail on other
434 architectures in the future. Fixes bug 40274; bugfix
437 o Minor bugfixes (controller):
438 - Fix a "BUG" warning that would appear when a controller chooses
439 the first hop for a circuit, and that circuit completes. Fixes bug
440 40285; bugfix on 0.3.2.1-alpha.
442 o Minor bugfixes (directory authorities, voting):
443 - Add a new consensus method (31) to support any future changes that
444 authorities decide to make to the value of bwweightscale or
445 maxunmeasuredbw. Previously, there was a bug that prevented the
446 authorities from parsing these consensus parameters correctly under
447 most circumstances. Fixes bug 19011; bugfix on 0.2.2.10-alpha.
449 o Minor bugfixes (ipv6):
450 - Allow non-SOCKSPorts to disable IPv4, IPv6, and PreferIPv4. Some
451 rare configurations might break, but in this case you can disable
452 NoIPv4Traffic and NoIPv6Traffic as needed. Fixes bug 33607; bugfix
453 on 0.4.1.1-alpha. Patch by Neel Chauhan.
455 o Minor bugfixes (key generation):
456 - Do not require a valid torrc when using the `--keygen` argument to
457 generate a signing key. This allows us to generate keys on systems
458 or users which may not run Tor. Fixes bug 40235; bugfix on
459 0.2.7.2-alpha. Patch by Neel Chauhan.
461 o Minor bugfixes (onion services, logging):
462 - Downgrade the severity of a few rendezvous circuit-related
463 warnings from warning to info. Fixes bug 40207; bugfix on
464 0.3.2.1-alpha. Patch by Neel Chauhan.
466 o Minor bugfixes (relay):
467 - Reduce the compression level for data streaming from HIGH to LOW.
468 This should reduce the CPU and memory burden for directory caches.
469 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
471 o Code simplification and refactoring:
472 - Remove the orconn_ext_or_id_map structure and related functions.
473 (Nothing outside of unit tests used them.) Closes ticket 33383.
474 Patch by Neel Chauhan.
477 - As of this release, Tor no longer supports the old v2 onion
478 services. They were deprecated last July for security, and support
479 will be removed entirely later this year. We strongly encourage
480 everybody to migrate to v3 onion services. For more information,
481 see https://blog.torproject.org/v2-deprecation-timeline . Closes
482 ticket 40266. (NOTE: We accidentally released an earlier version
483 of the 0.4.6.1-alpha changelog without this entry. Sorry for
486 o Code simplification and refactoring (metrics, DoS):
487 - Move the DoS subsystem into the subsys manager, including its
488 configuration options. Closes ticket 40261.
490 o Removed features (relay):
491 - Because DirPorts are only used on authorities, relays no longer
492 advertise them. Similarly, self-testing for DirPorts has been
493 disabled, since an unreachable DirPort is no reason for a relay
494 not to advertise itself. (Configuring a DirPort will still work,
495 for now.) Closes ticket 40282.
498 Changes in version 0.3.5.14 - 2021-03-16
499 Tor 0.3.5.14 backports fixes for two important denial-of-service bugs
500 in earlier versions of Tor.
502 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
503 who can send directory data to a Tor instance to force that Tor
504 instance to consume huge amounts of CPU. This is easiest to exploit
505 against authorities, since anybody can upload to them, but directory
506 caches could also exploit this vulnerability against relays or clients
507 when they download. The other vulnerability (TROVE-2021-002) only
508 affects directory authorities, and would allow an attacker to remotely
509 crash the authority with an assertion failure. Patches have already
510 been provided to the authority operators, to help ensure
513 We recommend that everybody upgrade to one of the releases that fixes
514 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
517 This release also updates our GeoIP data source, and fixes a
520 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
521 - Disable the dump_desc() function that we used to dump unparseable
522 information to disk. It was called incorrectly in several places,
523 in a way that could lead to excessive CPU usage. Fixes bug 40286;
524 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
525 001 and CVE-2021-28089.
526 - Fix a bug in appending detached signatures to a pending consensus
527 document that could be used to crash a directory authority. Fixes
528 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
531 o Minor features (geoip data, backport from 0.4.5.7):
532 - We have switched geoip data sources. Previously we shipped IP-to-
533 country mappings from Maxmind's GeoLite2, but in 2019 they changed
534 their licensing terms, so we were unable to update them after that
535 point. We now ship geoip files based on the IPFire Location
536 Database instead. (See https://location.ipfire.org/ for more
537 information). This release updates our geoip files to match the
538 IPFire Location Database as retrieved on 2021/03/12. Closes
541 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
542 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
546 Changes in version 0.4.4.8 - 2021-03-16
547 Tor 0.4.4.8 backports fixes for two important denial-of-service bugs
548 in earlier versions of Tor.
550 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
551 who can send directory data to a Tor instance to force that Tor
552 instance to consume huge amounts of CPU. This is easiest to exploit
553 against authorities, since anybody can upload to them, but directory
554 caches could also exploit this vulnerability against relays or clients
555 when they download. The other vulnerability (TROVE-2021-002) only
556 affects directory authorities, and would allow an attacker to remotely
557 crash the authority with an assertion failure. Patches have already
558 been provided to the authority operators, to help ensure
561 We recommend that everybody upgrade to one of the releases that fixes
562 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
565 This release also updates our GeoIP data source, and fixes a
568 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
569 - Disable the dump_desc() function that we used to dump unparseable
570 information to disk. It was called incorrectly in several places,
571 in a way that could lead to excessive CPU usage. Fixes bug 40286;
572 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
573 001 and CVE-2021-28089.
574 - Fix a bug in appending detached signatures to a pending consensus
575 document that could be used to crash a directory authority. Fixes
576 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
579 o Minor features (geoip data, backport from 0.4.5.7):
580 - We have switched geoip data sources. Previously we shipped IP-to-
581 country mappings from Maxmind's GeoLite2, but in 2019 they changed
582 their licensing terms, so we were unable to update them after that
583 point. We now ship geoip files based on the IPFire Location
584 Database instead. (See https://location.ipfire.org/ for more
585 information). This release updates our geoip files to match the
586 IPFire Location Database as retrieved on 2021/03/12. Closes
589 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
590 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
594 Changes in version 0.4.5.7 - 2021-03-16
595 Tor 0.4.5.7 fixes two important denial-of-service bugs in earlier
598 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
599 who can send directory data to a Tor instance to force that Tor
600 instance to consume huge amounts of CPU. This is easiest to exploit
601 against authorities, since anybody can upload to them, but directory
602 caches could also exploit this vulnerability against relays or clients
603 when they download. The other vulnerability (TROVE-2021-002) only
604 affects directory authorities, and would allow an attacker to remotely
605 crash the authority with an assertion failure. Patches have already
606 been provided to the authority operators, to help ensure
609 We recommend that everybody upgrade to one of the releases that fixes
610 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
613 This release also updates our GeoIP data source, and fixes a few
614 smaller bugs in earlier releases.
616 o Major bugfixes (security, denial of service):
617 - Disable the dump_desc() function that we used to dump unparseable
618 information to disk. It was called incorrectly in several places,
619 in a way that could lead to excessive CPU usage. Fixes bug 40286;
620 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
621 001 and CVE-2021-28089.
622 - Fix a bug in appending detached signatures to a pending consensus
623 document that could be used to crash a directory authority. Fixes
624 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
627 o Minor features (geoip data):
628 - We have switched geoip data sources. Previously we shipped IP-to-
629 country mappings from Maxmind's GeoLite2, but in 2019 they changed
630 their licensing terms, so we were unable to update them after that
631 point. We now ship geoip files based on the IPFire Location
632 Database instead. (See https://location.ipfire.org/ for more
633 information). This release updates our geoip files to match the
634 IPFire Location Database as retrieved on 2021/03/12. Closes
637 o Minor bugfixes (directory authority):
638 - Now that exit relays don't allow exit connections to directory
639 authority DirPorts (to prevent network reentry), disable
640 authorities' reachability self test on the DirPort. Fixes bug
641 40287; bugfix on 0.4.5.5-rc.
643 o Minor bugfixes (documentation):
644 - Fix a formatting error in the documentation for
645 VirtualAddrNetworkIPv6. Fixes bug 40256; bugfix on 0.2.9.4-alpha.
647 o Minor bugfixes (Linux, relay):
648 - Fix a bug in determining total available system memory that would
649 have been triggered if the format of Linux's /proc/meminfo file
650 had ever changed to include "MemTotal:" in the middle of a line.
651 Fixes bug 40315; bugfix on 0.2.5.4-alpha.
653 o Minor bugfixes (metrics port):
654 - Fix a BUG() warning on the MetricsPort for an internal missing
655 handler. Fixes bug 40295; bugfix on 0.4.5.1-alpha.
657 o Minor bugfixes (onion service):
658 - Remove a harmless BUG() warning when reloading tor configured with
659 onion services. Fixes bug 40334; bugfix on 0.4.5.1-alpha.
661 o Minor bugfixes (portability):
662 - Fix a non-portable usage of "==" with "test" in the configure
663 script. Fixes bug 40298; bugfix on 0.4.5.1-alpha.
665 o Minor bugfixes (relay):
666 - Remove a spammy log notice falsely claiming that the IPv4/v6
667 address was missing. Fixes bug 40300; bugfix on 0.4.5.1-alpha.
668 - Do not query the address cache early in the boot process when
669 deciding if a relay needs to fetch early directory information
670 from an authority. This bug resulted in a relay falsely believing
671 it didn't have an address and thus triggering an authority fetch
672 at each boot. Related to our fix for 40300.
674 o Removed features (mallinfo deprecated):
675 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
679 Changes in version 0.4.5.6 - 2021-02-15
680 The Tor 0.4.5.x release series is dedicated to the memory of Karsten
681 Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
682 Karsten is best known for creating the Tor metrics portal and leading
683 the metrics team, but he was involved in Tor from the early days. For
684 example, while he was still a student he invented and implemented the
685 v2 onion service directory design, and he also served as an ambassador
686 to the many German researchers working in the anonymity field. We
687 loved him and respected him for his patience, his consistency, and his
688 welcoming approach to growing our community.
690 This release series introduces significant improvements in relay IPv6
691 address discovery, a new "MetricsPort" mechanism for relay operators
692 to measure performance, LTTng support, build system improvements to
693 help when using Tor as a static library, and significant bugfixes
694 related to Windows relay performance. It also includes numerous
695 smaller features and bugfixes.
697 Below are the changes since 0.4.4.4-rc. For a complete list of changes
698 since 0.4.4.7, see the ReleaseNotes file.
700 o Major bugfixes (IPv6, relay):
701 - Fix a bug that prevented a relay from publishing its descriptor if
702 an auto-discovered IPv6 that was found unreachable. Fixes bug
703 40279; bugfix on 0.4.5.1-alpha.
705 o Minor features (protocol versions):
706 - Stop claiming to support the "DirCache=1" subprotocol version.
707 Technically, we stopped supporting this subprotocol back in
708 0.4.5.1-alpha, but we needed to wait for the authorities to stop
709 listing it as "required" before we could drop it from the list.
712 o Minor bugfixes (logging):
713 - Avoid a spurious log message about missing subprotocol versions,
714 when the consensus that we're reading from is older than the
715 current release. Previously we had made this message nonfatal, but
716 in practice, it is never relevant when the consensus is older than
717 the current release. Fixes bug 40281; bugfix on 0.4.0.1-alpha.
719 o Minor bugfixes (metrics port):
720 - Fix a bug warning when a metrics port socket was unexpectedly
721 closed. Fixes bug 40257; bugfix on 0.4.5.1-alpha
723 o Minor bugfixes (relay):
724 - Allow relays to have a RFC1918 address if PublishServerDescriptor
725 is set to 0 and AssumeReachable is set to 1. This is to support
726 the use case of a bridge on a local network, exposed via a
727 pluggable transport. Fixes bug 40208; bugfix on 0.4.5.1-alpha.
729 o Minor bugfixes (relay, config):
730 - Fix a problem in the removal of duplicate ORPorts from the
731 internal port list when loading the config file. We were removing
732 the wrong ports, breaking valid torrc uses cases for multiple
733 ORPorts of the same address family. Fixes bug 40289; bugfix
737 Changes in version 0.4.4.7 - 2021-02-03
738 Tor 0.4.4.7 backports numerous bugfixes from later releases,
739 including one that made v3 onion services more susceptible to
740 denial-of-service attacks, and a feature that makes some kinds of
741 DoS attacks harder to perform.
743 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
744 - Stop requiring a live consensus for v3 clients and services, and
745 allow a "reasonably live" consensus instead. This allows v3 onion
746 services to work even if the authorities fail to generate a
747 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
750 o Major feature (exit, backport from 0.4.5.5-rc):
751 - Re-entry into the network is now denied at the Exit level to all
752 relays' ORPorts and authorities' ORPorts and DirPorts. This change
753 should help mitgate a set of denial-of-service attacks. Closes
756 o Minor feature (build system, backport from 0.4.5.4-rc):
757 - New "make lsp" command to generate the compile_commands.json file
758 used by the ccls language server. The "bear" program is needed for
759 this. Closes ticket 40227.
761 o Minor features (compilation, backport from 0.4.5.2-rc):
762 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
763 later. There are a number of APIs newly deprecated in OpenSSL
764 3.0.0 that Tor still requires. (A later version of Tor will try to
765 stop depending on these APIs.) Closes ticket 40165.
767 o Minor features (crypto, backport from 0.4.5.3-rc):
768 - Fix undefined behavior on our Keccak library. The bug only
769 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
770 and would result in wrong digests. Fixes bug 40210; bugfix on
771 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
772 weasel for diagnosing this.
774 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
775 - Strip '\r' characters when reading text files on Unix platforms.
776 This should resolve an issue where a relay operator migrates a
777 relay from Windows to Unix, but does not change the line ending of
778 Tor's various state files to match the platform, and the CRLF line
779 endings from Windows end up leaking into other files such as the
780 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
782 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
783 - Fix a compilation warning about unreachable fallthrough
784 annotations when building with "--enable-all-bugs-are-fatal" on
785 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
787 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
788 - Handle partial SOCKS5 messages correctly. Previously, our code
789 would send an incorrect error message if it got a SOCKS5 request
790 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
792 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
793 - Fix the `config/parse_tcp_proxy_line` test so that it works
794 correctly on systems where the DNS provider hijacks invalid
795 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
796 - Fix our Python reference-implementation for the v3 onion service
797 handshake so that it works correctly with the version of hashlib
798 provided by Python 3.9. Fixes part of bug 40179; bugfix
800 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
801 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
804 Changes in version 0.4.3.8 - 2021-02-03
805 Tor 0.4.3.8 backports numerous bugfixes from later releases,
806 including one that made v3 onion services more susceptible to
807 denial-of-service attacks, and a feature that makes some kinds of
808 DoS attacks harder to perform.
810 Note that this is, in all likelihood, the last release of Tor 0.4.3.x,
811 which will reach end-of-life on 15 Feb 2021.
813 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
814 - Stop requiring a live consensus for v3 clients and services, and
815 allow a "reasonably live" consensus instead. This allows v3 onion
816 services to work even if the authorities fail to generate a
817 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
820 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
821 - Fix a bug where we were undercounting the Tor network's total
822 onion service traffic, by ignoring any traffic originating from
823 clients. Now we count traffic from both clients and services.
824 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
826 o Major feature (exit, backport from 0.4.5.5-rc):
827 - Re-entry into the network is now denied at the Exit level to all
828 relays' ORPorts and authorities' ORPorts and DirPorts. This change
829 should help mitgate a set of denial-of-service attacks. Closes
832 o Minor feature (build system, backport from 0.4.5.4-rc):
833 - New "make lsp" command to generate the compile_commands.json file
834 used by the ccls language server. The "bear" program is needed for
835 this. Closes ticket 40227.
837 o Minor features (compilation, backport from 0.4.5.2-rc):
838 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
839 later. There are a number of APIs newly deprecated in OpenSSL
840 3.0.0 that Tor still requires. (A later version of Tor will try to
841 stop depending on these APIs.) Closes ticket 40165.
843 o Minor features (crypto, backport from 0.4.5.3-rc):
844 - Fix undefined behavior on our Keccak library. The bug only
845 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
846 and would result in wrong digests. Fixes bug 40210; bugfix on
847 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
848 weasel for diagnosing this.
850 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
851 - Strip '\r' characters when reading text files on Unix platforms.
852 This should resolve an issue where a relay operator migrates a
853 relay from Windows to Unix, but does not change the line ending of
854 Tor's various state files to match the platform, and the CRLF line
855 endings from Windows end up leaking into other files such as the
856 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
858 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
859 - Resolve a compilation warning that could occur in
860 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
862 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
863 - Fix a compilation warning about unreachable fallthrough
864 annotations when building with "--enable-all-bugs-are-fatal" on
865 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
867 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
868 - Handle partial SOCKS5 messages correctly. Previously, our code
869 would send an incorrect error message if it got a SOCKS5 request
870 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
872 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
873 - Fix the `config/parse_tcp_proxy_line` test so that it works
874 correctly on systems where the DNS provider hijacks invalid
875 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
876 - Fix our Python reference-implementation for the v3 onion service
877 handshake so that it works correctly with the version of hashlib
878 provided by Python 3.9. Fixes part of bug 40179; bugfix
880 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
881 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
884 Changes in version 0.3.5.13 - 2020-02-03
885 Tor 0.3.5.13 backports numerous bugfixes from later releases,
886 including one that made v3 onion services more susceptible to
887 denial-of-service attacks, and a feature that makes some kinds of
888 DoS attacks harder to perform.
890 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
891 - Stop requiring a live consensus for v3 clients and services, and
892 allow a "reasonably live" consensus instead. This allows v3 onion
893 services to work even if the authorities fail to generate a
894 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
897 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
898 - Fix a bug where we were undercounting the Tor network's total
899 onion service traffic, by ignoring any traffic originating from
900 clients. Now we count traffic from both clients and services.
901 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
903 o Major feature (exit, backport from 0.4.5.5-rc):
904 - Re-entry into the network is now denied at the Exit level to all
905 relays' ORPorts and authorities' ORPorts and DirPorts. This change
906 should help mitgate a set of denial-of-service attacks. Closes
909 o Minor feature (build system, backport from 0.4.5.4-rc):
910 - New "make lsp" command to generate the compile_commands.json file
911 used by the ccls language server. The "bear" program is needed for
912 this. Closes ticket 40227.
914 o Minor features (compilation, backport from 0.4.5.2-rc):
915 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
916 later. There are a number of APIs newly deprecated in OpenSSL
917 3.0.0 that Tor still requires. (A later version of Tor will try to
918 stop depending on these APIs.) Closes ticket 40165.
920 o Minor features (crypto, backport from 0.4.5.3-rc):
921 - Fix undefined behavior on our Keccak library. The bug only
922 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
923 and would result in wrong digests. Fixes bug 40210; bugfix on
924 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
925 weasel for diagnosing this.
927 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
928 - Strip '\r' characters when reading text files on Unix platforms.
929 This should resolve an issue where a relay operator migrates a
930 relay from Windows to Unix, but does not change the line ending of
931 Tor's various state files to match the platform, and the CRLF line
932 endings from Windows end up leaking into other files such as the
933 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
935 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
936 - Resolve a compilation warning that could occur in
937 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
939 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
940 - Fix a compilation warning about unreachable fallthrough
941 annotations when building with "--enable-all-bugs-are-fatal" on
942 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
944 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
945 - Handle partial SOCKS5 messages correctly. Previously, our code
946 would send an incorrect error message if it got a SOCKS5 request
947 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
949 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
950 - Fix our Python reference-implementation for the v3 onion service
951 handshake so that it works correctly with the version of hashlib
952 provided by Python 3.9. Fixes part of bug 40179; bugfix
954 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
955 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
958 Changes in version 0.4.5.5-rc - 2021-02-01
959 Tor 0.4.5.5-rc is the third release candidate in its series. We're
960 coming closer and closer to a stable release series. This release
961 fixes an annoyance with address detection code, and somewhat mitigates
962 an ongoing denial-of-service attack.
964 We anticipate no more code changes between this and the stable
965 release, though of course that could change.
967 o Major feature (exit):
968 - Re-entry into the network is now denied at the Exit level to all
969 relays' ORPorts and authorities' ORPorts and DirPorts. This change
970 should help mitgate a set of denial-of-service attacks. Closes
973 o Minor bugfixes (relay, configuration):
974 - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort
975 for it can be found in the configuration. Fixes bug 40254; bugfix
979 Changes in version 0.4.5.4-rc - 2021-01-22
980 Tor 0.4.5.4-rc is the second release candidate in its series. It fixes
981 several bugs present in previous releases.
983 We expect that the stable release will be the same, or almost the
984 same, as this release candidate, unless serious bugs are found.
986 o Major bugfixes (authority, IPv6):
987 - Do not consider multiple relays in the same IPv6 /64 network to be
988 sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
990 o Major bugfixes (directory cache, performance, windows):
991 - Limit the number of items in the consensus diff cache to 64 on
992 Windows. We hope this will mitigate an issue where Windows relay
993 operators reported Tor using 100% CPU, while we investigate better
994 solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.
996 o Minor feature (build system):
997 - New "make lsp" command to generate the compile_commands.json file
998 used by the ccls language server. The "bear" program is needed for
999 this. Closes ticket 40227.
1001 o Minor features (authority, logging):
1002 - Log more information for directory authority operators during the
1003 consensus voting process, and while processing relay descriptors.
1004 Closes ticket 40245.
1005 - Reject obsolete router/extrainfo descriptors earlier and more
1006 quietly, to avoid spamming the logs. Fixes bug 40238; bugfix
1009 o Minor bugfixes (compilation):
1010 - Fix another warning about unreachable fallthrough annotations when
1011 building with "--enable-all-bugs-are-fatal" on some compilers.
1012 Fixes bug 40241; bugfix on 0.4.5.3-rc.
1013 - Change the linker flag ordering in our library search code so that
1014 it works for compilers that need the libraries to be listed in the
1015 right order. Fixes bug 33624; bugfix on 0.1.1.0-alpha.
1017 o Minor bugfixes (config, bridge):
1018 - Don't initiate a connection to a bridge configured to use a
1019 missing transport. This change reverts an earlier fix that would
1020 try to avoid such situations during configuration chcecking, but
1021 which doesn't work with DisableNetwork. Fixes bug 40106; bugfix
1024 o Minor bugfixes (onion services):
1025 - Avoid a non-fatal assertion in certain edge-cases when
1026 establishing a circuit to an onion service. Fixes bug 32666;
1027 bugfix on 0.3.0.3-alpha.
1029 o Minor bugfixes (relay):
1030 - If we were unable to build our descriptor, don't mark it as having
1031 been advertised. Also remove an harmless BUG(). Fixes bug 40231;
1032 bugfix on 0.4.5.1-alpha.
1035 Changes in version 0.4.5.3-rc - 2021-01-12
1036 Tor 0.4.5.3-rc is the first release candidate in its series. It fixes
1037 several bugs, including one that broke onion services on certain older
1038 ARM CPUs, and another that made v3 onion services less reliable.
1040 Though we anticipate that we'll be doing a bit more clean-up between
1041 now and the stable release, we expect that our remaining changes will
1042 be fairly simple. There will be at least one more release candidate
1043 before 0.4.5.x is stable.
1045 o Major bugfixes (onion service v3):
1046 - Stop requiring a live consensus for v3 clients and services, and
1047 allow a "reasonably live" consensus instead. This allows v3 onion
1048 services to work even if the authorities fail to generate a
1049 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1052 o Minor features (crypto):
1053 - Fix undefined behavior on our Keccak library. The bug only
1054 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1055 and would result in wrong digests. Fixes bug 40210; bugfix on
1056 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1057 weasel for diagnosing this.
1059 o Minor features (documentation):
1060 - Mention the "!badexit" directive that can appear in an authority's
1061 approved-routers file, and update the description of the
1062 "!invalid" directive. Closes ticket 40188.
1064 o Minor bugfixes (compilation):
1065 - Fix a compilation warning about unreachable fallthrough
1066 annotations when building with "--enable-all-bugs-are-fatal" on
1067 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1068 - Fix the "--enable-static-tor" switch to properly set the "-static"
1069 compile option onto the tor binary only. Fixes bug 40111; bugfix
1072 o Minor bugfixes (config, bridge):
1073 - Really fix the case where torrc has a missing ClientTransportPlugin
1074 but is configured with a Bridge line and UseBridges. Previously,
1075 we didn't look at the managed proxy list and thus would fail for
1076 the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha.
1078 o Minor bugfixes (logging, relay):
1079 - Log our address as reported by the directory authorities, if none
1080 was configured or detected before. Fixes bug 40201; bugfix
1082 - When a launching bandwidth testing circuit, don't incorrectly call
1083 it a reachability test, or trigger a "CHECKING_REACHABILITY"
1084 control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha.
1086 o Minor bugfixes (relay, statistics):
1087 - Report the correct connection statistics in our extrainfo
1088 documents. Previously there was a problem in the file loading
1089 function which would wrongly truncate a state file, causing the
1090 wrong information to be reported. Fixes bug 40226; bugfix
1093 o Minor bugfixes (SOCKS5):
1094 - Handle partial SOCKS5 messages correctly. Previously, our code
1095 would send an incorrect error message if it got a SOCKS5 request
1096 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1099 Changes in version 0.4.5.2-alpha - 2020-11-23
1100 Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series.
1101 It fixes several bugs present in earlier releases, including one that
1102 made it impractical to run relays on Windows. It also adds a few small
1103 safety features to improve Tor's behavior in the presence of strange
1104 compile-time options, misbehaving proxies, and future versions
1107 o Major bugfixes (relay, windows):
1108 - Fix a bug in our implementation of condition variables on Windows.
1109 Previously, a relay on Windows would use 100% CPU after running
1110 for some time. Because of this change, Tor now require Windows
1111 Vista or later to build and run. Fixes bug 30187; bugfix on
1112 0.2.6.3-alpha. (This bug became more serious in 0.3.1.1-alpha with
1113 the introduction of consensus diffs.) Patch by Daniel Pinto.
1115 o Minor features (compilation):
1116 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1117 later. There are a number of APIs newly deprecated in OpenSSL
1118 3.0.0 that Tor still requires. (A later version of Tor will try to
1119 stop depending on these APIs.) Closes ticket 40165.
1121 o Minor features (protocol, proxy support, defense in depth):
1122 - Respond more deliberately to misbehaving proxies that leave
1123 leftover data on their connections, so as to make Tor even less
1124 likely to allow the proxies to pass their data off as having come
1125 from a relay. Closes ticket 40017.
1127 o Minor features (safety):
1128 - Log a warning at startup if Tor is built with compile-time options
1129 that are likely to make it less stable or reliable. Closes
1132 o Minor bugfixes (circuit, handshake):
1133 - In the v3 handshaking code, use connection_or_change_state() to
1134 change the state. Previously, we changed the state directly, but
1135 this did not pass the state change to the pubsub or channel
1136 objects, potentially leading to bugs. Fixes bug 32880; bugfix on
1137 0.2.3.6-alpha. Patch by Neel Chauhan.
1139 o Minor bugfixes (compilation):
1140 - Use the correct 'ranlib' program when building libtor.a.
1141 Previously we used the default ranlib, which broke some kinds of
1142 cross-compilation. Fixes bug 40172; bugfix on 0.4.5.1-alpha.
1143 - Remove a duplicate typedef in metrics_store.c. Fixes bug 40177;
1144 bugfix on 0.4.5.1-alpha.
1145 - When USDT tracing is enabled, and STAP_PROBEV() is missing, don't
1146 attempt to build. Linux supports that macro but not the BSDs.
1147 Fixes bug 40174; bugfix on 0.4.5.1-alpha.
1149 o Minor bugfixes (configuration):
1150 - Exit Tor on a misconfiguration when the Bridge line is configured
1151 to use a transport but no corresponding ClientTransportPlugin can
1152 be found. Prior to this fix, Tor would attempt to connect to the
1153 bridge directly without using the transport, making it easier for
1154 adversaries to notice the bridge. Fixes bug 25528; bugfix
1156 - Fix an issue where an ORPort was compared with other kinds of
1157 ports, when it should have been only checked against other
1158 ORPorts. This bug would lead to "DirPort auto" getting ignored.
1159 Fixes bug 40195; bugfix on 0.4.5.1-alpha.
1160 - Fix a bug where a second non-ORPort with a variant family (ex:
1161 SocksPort [::1]:9050) would be ignored due to a configuration
1162 parsing error. Fixes bug 40183; bugfix on 0.4.5.1-alpha.
1164 o Minor bugfixes (crash, relay, signing key):
1165 - Avoid assertion failures when we run Tor from the command line
1166 with `--key-expiration sign`, but an ORPort is not set. Fixes bug
1167 40015; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
1169 o Minor bugfixes (logging):
1170 - Remove trailing whitespace from control event log messages. Fixes
1171 bug 32178; bugfix on 0.1.1.1-alpha. Based on a patch by
1173 - Turn warning-level log message about SENDME failure into a debug-
1174 level message. (This event can happen naturally, and is no reason
1175 for concern). Fixes bug 40142; bugfix on 0.4.1.1-alpha.
1177 o Minor bugfixes (relay, address discovery):
1178 - Don't trigger an IP change when no new valid IP can be found.
1179 Fixes bug 40071; bugfix on 0.4.5.1-alpha.
1180 - When attempting to discover our IP, use a simple test circuit,
1181 rather than a descriptor fetch: the same address information is
1182 present in NETINFO cells, and is better authenticated there. Fixes
1183 bug 40071; bugfix on 0.4.5.1-alpha.
1185 o Minor bugfixes (testing):
1186 - Fix the `config/parse_tcp_proxy_line` test so that it works
1187 correctly on systems where the DNS provider hijacks invalid
1188 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1189 - Fix unit tests that used newly generated list of routers so that
1190 they check them with respect to the date when they were generated,
1191 not with respect to the current time. Fixes bug 40187; bugfix
1193 - Fix our Python reference-implementation for the v3 onion service
1194 handshake so that it works correctly with the version of hashlib
1195 provided by Python 3.9. Fixes part of bug 40179; bugfix
1197 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1198 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1200 o Removed features (controller):
1201 - Remove the "GETINFO network-status" controller command. It has
1202 been deprecated since 0.3.1.1-alpha. Closes ticket 22473.
1205 Changes in version 0.4.4.6 - 2020-11-12
1206 Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It
1207 backports fixes from later releases, including a fix for TROVE-2020-
1208 005, a security issue that could be used, under certain cases, by an
1209 adversary to observe traffic patterns on a limited number of circuits
1210 intended for a different relay.
1212 o Major bugfixes (security, backport from 0.4.5.1-alpha):
1213 - When completing a channel, relays now check more thoroughly to
1214 make sure that it matches any pending circuits before attaching
1215 those circuits. Previously, address correctness and Ed25519
1216 identities were not checked in this case, but only when extending
1217 circuits on an existing channel. Fixes bug 40080; bugfix on
1218 0.2.7.2-alpha. Resolves TROVE-2020-005.
1220 o Minor features (directory authorities, backport from 0.4.5.1-alpha):
1221 - Authorities now list a different set of protocols as required and
1222 recommended. These lists have been chosen so that only truly
1223 recommended and/or required protocols are included, and so that
1224 clients using 0.2.9 or later will continue to work (even though
1225 they are not supported), whereas only relays running 0.3.5 or
1226 later will meet the requirements. Closes ticket 40162.
1227 - Make it possible to specify multiple ConsensusParams torrc lines.
1228 Now directory authority operators can for example put the main
1229 ConsensusParams config in one torrc file and then add to it from a
1230 different torrc file. Closes ticket 40164.
1232 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
1233 - Tor no longer allows subprotocol versions larger than 63.
1234 Previously version numbers up to UINT32_MAX were allowed, which
1235 significantly complicated our code. Implements proposal 318;
1236 closes ticket 40133.
1238 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
1239 - Fix a rendezvous cache unit test that was triggering an underflow
1240 on the global rend cache allocation. Fixes bug 40125; bugfix
1242 - Fix another rendezvous cache unit test that was triggering an
1243 underflow on the global rend cache allocation. Fixes bug 40126;
1244 bugfix on 0.2.8.1-alpha.
1246 o Minor bugfixes (compilation, backport from 0.4.5.1-alpha):
1247 - Fix compiler warnings that would occur when building with
1248 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
1249 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
1250 - Resolve a compilation warning that could occur in
1251 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1253 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
1254 - Remove a debug logging statement that uselessly spammed the logs.
1255 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
1257 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
1258 - Avoid a fatal assert() when failing to create a listener
1259 connection for an address that was in use. Fixes bug 40073; bugfix
1262 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
1263 - For HSFETCH commands on v2 onion services addresses, check the
1264 length of bytes decoded, not the base32 length. Fixes bug 34400;
1265 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
1268 Changes in version 0.4.3.7 - 2020-11-12
1269 Tor 0.4.3.7 backports several bugfixes from later releases. It
1270 includes a fix for TROVE-2020-005, a security issue that could be
1271 used, under certain cases, by an adversary to observe traffic patterns
1272 on a limited number of circuits intended for a different relay.
1274 Please be aware that support for the 0.4.3.x series will end on 15
1275 February 2021. Please upgrade to 0.4.4.x or 0.4.5.x before then, or
1276 downgrade to 0.3.5.x, which will be supported until at least 1
1279 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
1280 - Replace the 148 fallback directories originally included in Tor
1281 0.4.1.4-rc (of which around 105 are still functional) with a list
1282 of 144 fallbacks generated in July 2020. Closes ticket 40061.
1284 o Major bugfixes (security, backport from 0.4.5.1-alpha):
1285 - When completing a channel, relays now check more thoroughly to
1286 make sure that it matches any pending circuits before attaching
1287 those circuits. Previously, address correctness and Ed25519
1288 identities were not checked in this case, but only when extending
1289 circuits on an existing channel. Fixes bug 40080; bugfix on
1290 0.2.7.2-alpha. Resolves TROVE-2020-005.
1292 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
1293 - When running with NSS enabled, make sure that NSS knows to expect
1294 nonblocking sockets. Previously, we set our TCP sockets as
1295 nonblocking, but did not tell NSS, which in turn could lead to
1296 unexpected blocking behavior. Fixes bug 40035; bugfix
1299 o Minor features (security, backport from 0.4.4.4-rc):
1300 - Channels using obsolete versions of the Tor link protocol are no
1301 longer allowed to circumvent address-canonicity checks. (This is
1302 only a minor issue, since such channels have no way to set ed25519
1303 keys, and therefore should always be rejected for circuits that
1304 specify ed25519 identities.) Closes ticket 40081.
1306 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
1307 - Tor no longer allows subprotocol versions larger than 63.
1308 Previously version numbers up to UINT32_MAX were allowed, which
1309 significantly complicated our code. Implements proposal 318;
1310 closes ticket 40133.
1312 o Minor features (tests, backport from 0.4.4.5):
1313 - Our "make check" target now runs the unit tests in 8 parallel
1314 chunks. Doing this speeds up hardened CI builds by more than a
1315 factor of two. Closes ticket 40098.
1317 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
1318 - Fix a rendezvous cache unit test that was triggering an underflow
1319 on the global rend cache allocation. Fixes bug 40125; bugfix
1321 - Fix another rendezvous cache unit test that was triggering an
1322 underflow on the global rend cache allocation. Fixes bug 40126;
1323 bugfix on 0.2.8.1-alpha.
1325 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
1326 - Fix a correctness bug that could cause an assertion failure if we
1327 ever tried using the buf_move_all() function with an empty input
1328 buffer. As far as we know, no released versions of Tor do this.
1329 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
1331 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
1332 - Remove a debug logging statement that uselessly spammed the logs.
1333 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
1335 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
1336 - On a bridge, treat all connections from an ExtORPort as remote by
1337 default for the purposes of rate-limiting. Previously, bridges
1338 would treat the connection as local unless they explicitly
1339 received a "USERADDR" command. ExtORPort connections still count
1340 as local if there is a USERADDR command with an explicit local
1341 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
1343 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
1344 - Avoid a fatal assert() when failing to create a listener
1345 connection for an address that was in use. Fixes bug 40073; bugfix
1348 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
1349 - Adjust the rules for when to warn about having too many
1350 connections to other relays. Previously we'd tolerate up to 1.5
1351 connections per relay on average. Now we tolerate more connections
1352 for directory authorities, and raise the number of total
1353 connections we need to see before we warn. Fixes bug 33880; bugfix
1356 o Minor bugfixes (tests, 0.4.4.5):
1357 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
1358 on its own. Previously, it would exit with an error. Fixes bug
1359 40099; bugfix on 0.2.8.1-alpha.
1361 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
1362 - For HSFETCH commands on v2 onion services addresses, check the
1363 length of bytes decoded, not the base32 length. Fixes bug 34400;
1364 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
1366 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
1367 - Fix a bug that prevented Tor from starting if its log file grew
1368 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
1370 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
1371 - Add a deprecation warning for version 2 onion services. Closes
1374 o Removed features (backport from 0.4.4.3-alpha):
1375 - Our "check-local" test target no longer tries to use the
1376 Coccinelle semantic patching tool parse all the C files. While it
1377 is a good idea to try to make sure Coccinelle works on our C
1378 before we run a Coccinelle patch, doing so on every test run has
1379 proven to be disruptive. You can still run this tool manually with
1380 "make check-cocci". Closes ticket 40030. ticket 40030.
1383 Changes in version 0.3.5.12 - 2020-11-12
1384 Tor 0.4.3.7 backports several bugfixes from later releases. It
1385 includes a fix for TROVE-2020-005, a security issue that could be
1386 used, under certain cases, by an adversary to observe traffic patterns
1387 on a limited number of circuits intended for a different relay.
1389 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
1390 - Replace the 148 fallback directories originally included in Tor
1391 0.4.1.4-rc (of which around 105 are still functional) with a list
1392 of 144 fallbacks generated in July 2020. Closes ticket 40061.
1394 o Major bugfixes (security, backport from 0.4.5.1-alpha):
1395 - When completing a channel, relays now check more thoroughly to
1396 make sure that it matches any pending circuits before attaching
1397 those circuits. Previously, address correctness and Ed25519
1398 identities were not checked in this case, but only when extending
1399 circuits on an existing channel. Fixes bug 40080; bugfix on
1400 0.2.7.2-alpha. Resolves TROVE-2020-005.
1402 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
1403 - When running with NSS enabled, make sure that NSS knows to expect
1404 nonblocking sockets. Previously, we set our TCP sockets as
1405 nonblocking, but did not tell NSS, which in turn could lead to
1406 unexpected blocking behavior. Fixes bug 40035; bugfix
1409 o Minor features (security, backport from 0.4.4.4-rc):
1410 - Channels using obsolete versions of the Tor link protocol are no
1411 longer allowed to circumvent address-canonicity checks. (This is
1412 only a minor issue, since such channels have no way to set ed25519
1413 keys, and therefore should always be rejected for circuits that
1414 specify ed25519 identities.) Closes ticket 40081.
1416 o Minor features (debugging, directory system):
1417 - Don't crash when we find a non-guard with a guard-fraction value
1418 set. Instead, log a bug warning, in an attempt to figure out how
1419 this happened. Diagnostic for ticket 32868.
1421 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
1422 - Tor no longer allows subprotocol versions larger than 63.
1423 Previously version numbers up to UINT32_MAX were allowed, which
1424 significantly complicated our code. Implements proposal 318;
1425 closes ticket 40133.
1427 o Minor features (tests, backport from 0.4.4.5):
1428 - Our "make check" target now runs the unit tests in 8 parallel
1429 chunks. Doing this speeds up hardened CI builds by more than a
1430 factor of two. Closes ticket 40098.
1432 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
1433 - Fix a rendezvous cache unit test that was triggering an underflow
1434 on the global rend cache allocation. Fixes bug 40125; bugfix
1436 - Fix another rendezvous cache unit test that was triggering an
1437 underflow on the global rend cache allocation. Fixes bug 40126;
1438 bugfix on 0.2.8.1-alpha.
1440 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
1441 - Fix a correctness bug that could cause an assertion failure if we
1442 ever tried using the buf_move_all() function with an empty input
1443 buffer. As far as we know, no released versions of Tor do this.
1444 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
1446 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
1447 - Remove a debug logging statement that uselessly spammed the logs.
1448 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
1450 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
1451 - On a bridge, treat all connections from an ExtORPort as remote by
1452 default for the purposes of rate-limiting. Previously, bridges
1453 would treat the connection as local unless they explicitly
1454 received a "USERADDR" command. ExtORPort connections still count
1455 as local if there is a USERADDR command with an explicit local
1456 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
1458 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
1459 - Avoid a fatal assert() when failing to create a listener
1460 connection for an address that was in use. Fixes bug 40073; bugfix
1463 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
1464 - Adjust the rules for when to warn about having too many
1465 connections to other relays. Previously we'd tolerate up to 1.5
1466 connections per relay on average. Now we tolerate more connections
1467 for directory authorities, and raise the number of total
1468 connections we need to see before we warn. Fixes bug 33880; bugfix
1471 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
1472 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
1473 descriptors, when the IPv6 port was configured as "auto". Fixes
1474 bug 32588; bugfix on 0.2.3.9-alpha.
1476 o Minor bugfixes (tests, 0.4.4.5):
1477 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
1478 on its own. Previously, it would exit with an error. Fixes bug
1479 40099; bugfix on 0.2.8.1-alpha.
1481 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
1482 - Fix a bug that prevented Tor from starting if its log file grew
1483 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
1485 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
1486 - Add a deprecation warning for version 2 onion services. Closes
1490 Changes in version 0.4.5.1-alpha - 2020-11-01
1491 Tor 0.4.5.1-alpha is the first alpha release in the 0.4.5.x series. It
1492 improves support for IPv6, address discovery and self-testing, code
1493 metrics and tracing.
1495 This release also fixes TROVE-2020-005, a security issue that could be
1496 used, under certain cases, by an adversary to observe traffic patterns
1497 on a limited number of circuits intended for a different relay. To
1498 mount this attack, the adversary would need to actively extend
1499 circuits to an incorrect address, as well as compromise a relay's
1500 legacy RSA-1024 key. We'll be backporting this fix to other release
1501 series soon, after it has had some testing.
1503 Here are the changes since 0.4.4.5.
1505 o Major features (build):
1506 - When building Tor, first link all object files into a single
1507 static library. This may help with embedding Tor in other
1508 programs. Note that most Tor functions do not constitute a part of
1509 a stable or supported API: only those functions in tor_api.h
1510 should be used if embedding Tor. Closes ticket 40127.
1512 o Major features (metrics):
1513 - Introduce a new MetricsPort which exposes, through an HTTP
1514 interface, a series of metrics that tor collects at runtime. At
1515 the moment, the only supported output format is Prometheus data
1516 model. Closes ticket 40063. See the manual page for more
1517 information and security considerations.
1518 o Major features (relay, IPv6):
1519 - The torrc option Address now supports IPv6. This unifies our
1520 address discovery interface to support IPv4, IPv6, and hostnames.
1521 Closes ticket 33233.
1522 - Launch IPv4 and IPv6 ORPort self-test circuits on relays and
1523 bridges. Closes ticket 33222.
1524 - Relays now automatically bind on IPv6 for their ORPort, unless
1525 specified otherwise with the IPv4Only flag. Closes ticket 33246.
1526 - When a relay with IPv6 support is told to open a connection to
1527 another relay, and the extend cell lists both IPv4 and IPv6
1528 addresses, the first relay now picks randomly which address to
1529 use. Closes ticket 33220.
1530 - Relays now track their IPv6 ORPort reachability separately from
1531 the reachability of their IPv4 ORPort. They will not publish a
1532 descriptor unless _both_ ports appear to be externally reachable.
1533 Closes ticket 34067.
1535 o Major features (tracing):
1536 - Add event-tracing library support for USDT and LTTng-UST, and a
1537 few tracepoints in the circuit subsystem. More will come
1538 incrementally. This feature is compiled out by default: it needs
1539 to be enabled at configure time. See documentation in
1540 doc/HACKING/Tracing.md. Closes ticket 32910.
1542 o Major bugfixes (security):
1543 - When completing a channel, relays now check more thoroughly to
1544 make sure that it matches any pending circuits before attaching
1545 those circuits. Previously, address correctness and Ed25519
1546 identities were not checked in this case, but only when extending
1547 circuits on an existing channel. Fixes bug 40080; bugfix on
1548 0.2.7.2-alpha. Resolves TROVE-2020-005.
1550 o Major bugfixes (TLS, buffer):
1551 - When attempting to read N bytes on a TLS connection, really try to
1552 read all N bytes. Previously, Tor would stop reading after the
1553 first TLS record, which can be smaller than the N bytes requested,
1554 and not check for more data until the next mainloop event. Fixes
1555 bug 40006; bugfix on 0.1.0.5-rc.
1557 o Minor features (address discovery):
1558 - If no Address statements are found, relays now prioritize guessing
1559 their address by looking at the local interface instead of the
1560 local hostname. If the interface address can't be found, the local
1561 hostname is used. Closes ticket 33238.
1563 o Minor features (admin tools):
1564 - Add a new --format argument to -key-expiration option to allow
1565 specifying the time format of the expiration date. Adds Unix
1566 timestamp format support. Patch by Daniel Pinto. Closes
1569 o Minor features (bootstrap reporting):
1570 - When reporting bootstrapping status on a relay, do not consider
1571 connections that have never been the target of an origin circuit.
1572 Previously, all connection failures were treated as potential
1573 bootstrapping failures, including connections that had been opened
1574 because of client requests. Closes ticket 25061.
1576 o Minor features (build):
1577 - When running the configure script, try to detect version
1578 mismatches between the OpenSSL headers and libraries, and suggest
1579 that the user should try "--with-openssl-dir". Closes 40138.
1580 - If the configure script has given any warnings, remind the user
1581 about them at the end of the script. Related to 40138.
1583 o Minor features (configuration):
1584 - Allow using wildcards (* and ?) with the %include option on
1585 configuration files. Closes ticket 25140. Patch by Daniel Pinto.
1586 - Allow the configuration options EntryNodes, ExcludeNodes,
1587 ExcludeExitNodes, ExitNodes, MiddleNodes, HSLayer2Nodes and
1588 HSLayer3Nodes to be specified multiple times. Closes ticket 28361.
1589 Patch by Daniel Pinto.
1591 o Minor features (control port):
1592 - Add a DROPTIMEOUTS command to drop circuit build timeout history
1593 and reset the current timeout. Closes ticket 40002.
1594 - When a stream enters the AP_CONN_STATE_CONTROLLER_WAIT status,
1595 send a control port event. Closes ticket 32190. Patch by
1597 - Introduce GETINFO "stats/ntor/{assigned/requested}" and
1598 "stats/tap/{assigned/requested}" to get the NTor and TAP circuit
1599 onion handshake counts respectively. Closes ticket 28279. Patch by
1602 o Minor features (control port, IPv6):
1603 - Tor relays now try to report to the controller when they are
1604 launching an IPv6 self-test. Closes ticket 34068.
1605 - Introduce "GETINFO address/v4" and "GETINFO address/v6" in the
1606 control port to fetch the Tor host's respective IPv4 or IPv6
1607 address. We keep "GETINFO address" for backwards-compatibility.
1608 Closes ticket 40039. Patch by Neel Chauhan.
1610 o Minor features (directory authorities):
1611 - Authorities now list a different set of protocols as required and
1612 recommended. These lists have been chosen so that only truly
1613 recommended and/or required protocols are included, and so that
1614 clients using 0.2.9 or later will continue to work (even though
1615 they are not supported), whereas only relays running 0.3.5 or
1616 later will meet the requirements. Closes ticket 40162.
1617 - Add a new consensus method 30 that removes the unnecessary "="
1618 padding from ntor-onion-key. Closes ticket 7869. Patch by
1620 - Directory authorities now reject descriptors from relays running
1621 Tor versions from the obsolete 0.4.1 series. Resolves ticket
1622 34357. Patch by Neel Chauhan.
1623 - Make it possible to specify multiple ConsensusParams torrc lines.
1624 Now directory authority operators can for example put the main
1625 ConsensusParams config in one torrc file and then add to it from a
1626 different torrc file. Closes ticket 40164.
1627 - The AssumeReachable option no longer stops directory authorities
1628 from checking whether other relays are running. A new
1629 AuthDirTestReachability option can be used to disable these
1630 checks. Closes ticket 34445.
1631 - When looking for possible Sybil attacks, also consider IPv6
1632 addresses. Two routers are considered to have "the same" address
1633 by this metric if they are in the same /64 network. Patch from
1634 Maurice Pibouin. Closes ticket 7193.
1636 o Minor features (directory authorities, IPv6):
1637 - Make authorities add their IPv6 ORPort (if any) to the trusted
1638 servers list. Authorities previously added only their IPv4
1639 addresses. Closes ticket 32822.
1641 o Minor features (ed25519, relay):
1642 - Save a relay's base64-encoded ed25519 identity key to the data
1643 directory in a file named fingerprint-ed25519. Closes ticket
1644 30642. Patch by Neel Chauhan.
1646 o Minor features (heartbeat):
1647 - Include the total number of inbound and outbound IPv4 and IPv6
1648 connections in the heartbeat message. Closes ticket 29113.
1650 o Minor features (IPv6, ExcludeNodes):
1651 - Handle IPv6 addresses in ExcludeNodes; previously they were
1652 ignored. Closes ticket 34065. Patch by Neel Chauhan.
1654 o Minor features (logging):
1655 - Add the running glibc version to the log, and the compiled glibc
1656 version to the library list returned when using --library-versions.
1657 Patch from Daniel Pinto. Closes ticket 40047.
1658 - Consider an HTTP 301 response to be an error (like a 404) when
1659 processing a directory response. Closes ticket 40053.
1660 - Log directory fetch statistics as a single line. Closes
1662 - Provide more complete descriptions of our connections when logging
1663 about them. Closes ticket 40041.
1664 - When describing a relay in the logs, we now include its ed25519
1665 identity. Closes ticket 22668.
1667 o Minor features (onion services):
1668 - Only overwrite an onion service's existing hostname file if its
1669 contents are wrong. This enables read-only onion-service
1670 directories. Resolves ticket 40062. Patch by Neel Chauhan.
1672 o Minor features (pluggable transports):
1673 - Add an OutboundBindAddressPT option to allow users to specify
1674 which IPv4 and IPv6 address pluggable transports should use for
1675 outgoing IP packets. Tor does not have a way to enforce that the
1676 pluggable transport honors this option, so each pluggable transport
1677 needs to implement support on its own. Closes ticket 5304.
1679 o Minor features (relay address tracking):
1680 - We now store relay addresses for OR connections in a more logical
1681 way. Previously we would sometimes overwrite the actual address of
1682 a connection with a "canonical address", and then store the "real
1683 address" elsewhere to remember it. We now track the "canonical
1684 address" elsewhere for the cases where we need it, and leave the
1685 connection's address alone. Closes ticket 33898.
1687 o Minor features (relay):
1688 - If a relay is unable to discover its address, attempt to learn it
1689 from the NETINFO cell. Closes ticket 40022.
1690 - Log immediately when launching a relay self-check. Previously we
1691 would try to log before launching checks, or approximately when we
1692 intended to launch checks, but this tended to be error-prone.
1693 Closes ticket 34137.
1695 o Minor features (relay, address discovery):
1696 - If Address option is not found in torrc, attempt to learn our
1697 address with the configured ORPort address if any. Closes
1700 o Minor features (relay, IPv6):
1701 - Add an AssumeReachableIPv6 option to disable self-checking IPv6
1702 reachability. Closes part of ticket 33224.
1703 - Add new "assume-reachable" and "assume-reachable-ipv6" consensus
1704 parameters to be used in an emergency to tell relays that they
1705 should publish even if they cannot complete their ORPort self-
1706 checks. Closes ticket 34064 and part of 33224.
1707 - Allow relays to send IPv6-only extend cells. Closes ticket 33222.
1708 - Declare support for the Relay=3 subprotocol version. Closes
1710 - When launching IPv6 ORPort self-test circuits, make sure that the
1711 second-last hop can initiate an IPv6 extend. Closes ticket 33222.
1713 o Minor features (specification update):
1714 - Several fields in microdescriptors, router descriptors, and
1715 consensus documents that were formerly optional are now required.
1716 Implements proposal 315; closes ticket 40132.
1718 o Minor features (state management):
1719 - When loading the state file, remove entries from the statefile
1720 that have been obsolete for a long time. Ordinarily Tor preserves
1721 unrecognized entries in order to keep forward-compatibility, but
1722 these entries have not actually been used in any release since
1723 before 0.3.5.x. Closes ticket 40137.
1725 o Minor features (statistics, ipv6):
1726 - Relays now publish IPv6-specific counts of single-direction versus
1727 bidirectional relay connections. Closes ticket 33264.
1728 - Relays now publish their IPv6 read and write statistics over time,
1729 if statistics are enabled. Closes ticket 33263.
1731 o Minor features (subprotocol versions):
1732 - Tor no longer allows subprotocol versions larger than 63.
1733 Previously version numbers up to UINT32_MAX were allowed, which
1734 significantly complicated our code. Implements proposal 318;
1735 closes ticket 40133.
1736 - Use the new limitations on subprotocol versions due to proposal
1737 318 to simplify our implementation. Part of ticket 40133.
1739 o Minor features (testing configuration):
1740 - The TestingTorNetwork option no longer implicitly sets
1741 AssumeReachable to 1. This change allows us to test relays' self-
1742 testing mechanisms, and to test authorities' relay-testing
1743 functionality. Closes ticket 34446.
1745 o Minor features (testing):
1746 - Added unit tests for channel_matches_target_addr_for_extend().
1747 Closes Ticket 33919. Patch by MrSquanchee.
1749 o Minor features (tests, v2 onion services):
1750 - Fix a rendezvous cache unit test that was triggering an underflow
1751 on the global rend cache allocation. Fixes bug 40125; bugfix
1753 - Fix another rendezvous cache unit test that was triggering an
1754 underflow on the global rend cache allocation. Fixes bug 40126;
1755 bugfix on 0.2.8.1-alpha.
1757 o Minor bugfixes (circuit padding):
1758 - When circpad_send_padding_cell_for_callback is called,
1759 `is_padding_timer_scheduled` flag was not reset. Now it is set to
1760 0 at the top of that function. Fixes bug 32671; bugfix
1762 - Add a per-circuit padding machine instance counter, so we can
1763 differentiate between shutdown requests for old machines on a
1764 circuit. Fixes bug 30992; bugfix on 0.4.1.1-alpha.
1765 - Add the ability to keep circuit padding machines if they match a
1766 set of circuit states or purposes. This allows us to have machines
1767 that start up under some conditions but don't shut down under
1768 others. We now use this mask to avoid starting up introduction
1769 circuit padding again after the machines have already completed.
1770 Fixes bug 32040; bugfix on 0.4.1.1-alpha.
1772 o Minor bugfixes (compatibility):
1773 - Strip '\r' characters when reading text files on Unix platforms.
1774 This should resolve an issue where a relay operator migrates a
1775 relay from Windows to Unix, but does not change the line ending of
1776 Tor's various state files to match the platform, and the CRLF line
1777 endings from Windows end up leaking into other files such as the
1778 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1780 o Minor bugfixes (compilation):
1781 - Fix compiler warnings that would occur when building with
1782 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
1783 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
1784 - Resolve a compilation warning that could occur in
1785 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1787 o Minor bugfixes (configuration):
1788 - Fix bug where %including a pattern ending with */ would include
1789 files and folders (instead of folders only) in versions of glibc <
1790 2.19. Fixes bug 40141; bugfix on 0.4.5.0-alpha-dev. Patch by
1793 o Minor bugfixes (control port):
1794 - Make sure we send the SOCKS request address in relay begin cells
1795 when a stream is attached with the purpose
1796 CIRCUIT_PURPOSE_CONTROLLER. Fixes bug 33124; bugfix on 0.0.5.
1797 Patch by Neel Chauhan.
1799 o Minor bugfixes (logging):
1800 - Remove a debug logging statement that uselessly spammed the logs.
1801 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
1802 - When logging a rate-limited message about how many messages have
1803 been suppressed in the last N seconds, give an accurate value for
1804 N, rounded up to the nearest minute. Previously we would report
1805 the size of the rate-limiting interval, regardless of when the
1806 messages started to occur. Fixes bug 19431; bugfix
1809 o Minor bugfixes (relay configuration, crash):
1810 - Avoid a fatal assert() when failing to create a listener
1811 connection for an address that was in use. Fixes bug 40073; bugfix
1814 o Minor bugfixes (rust, protocol versions):
1815 - Declare support for the onion service introduction point denial of
1816 service extensions when building with Rust. Fixes bug 34248;
1817 bugfix on 0.4.2.1-alpha.
1818 - Make Rust protocol version support checks consistent with the
1819 undocumented error behavior of the corresponding C code. Fixes bug
1820 34251; bugfix on 0.3.3.5-rc.
1822 o Minor bugfixes (self-testing):
1823 - When receiving an incoming circuit, only accept it as evidence
1824 that we are reachable if the declared address of its channel is
1825 the same address we think that we have. Otherwise, it could be
1826 evidence that we're reachable on some other address. Fixes bug
1827 20165; bugfix on 0.1.0.1-rc.
1829 o Minor bugfixes (spec conformance):
1830 - Use the correct key type when generating signing->link
1831 certificates. Fixes bug 40124; bugfix on 0.2.7.2-alpha.
1833 o Minor bugfixes (subprotocol versions):
1834 - Consistently reject extra commas, instead of only rejecting
1835 leading commas. Fixes bug 27194; bugfix on 0.2.9.4-alpha.
1836 - In summarize_protover_flags(), treat empty strings the same as
1837 NULL. This prevents protocols_known from being set. Previously, we
1838 treated empty strings as normal strings, which led to
1839 protocols_known being set. Fixes bug 34232; bugfix on
1840 0.3.3.2-alpha. Patch by Neel Chauhan.
1842 o Minor bugfixes (v2 onion services):
1843 - For HSFETCH commands on v2 onion services addresses, check the
1844 length of bytes decoded, not the base32 length. Fixes bug 34400;
1845 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
1847 o Code simplification and refactoring:
1848 - Add and use a set of functions to perform down-casts on constant
1849 connection and channel pointers. Closes ticket 40046.
1850 - Refactor our code that logs descriptions of connections, channels,
1851 and the peers on them, to use a single call path. This change
1852 enables us to refactor the data types that they use, and eliminates
1853 many confusing usages of those types. Closes ticket 40041.
1854 - Refactor some common node selection code into a single function.
1855 Closes ticket 34200.
1856 - Remove the now-redundant 'outbuf_flushlen' field from our
1857 connection type. It was previously used for an older version of
1858 our rate-limiting logic. Closes ticket 33097.
1859 - Rename "fascist_firewall_*" identifiers to "reachable_addr_*"
1860 instead, for consistency with other code. Closes ticket 18106.
1861 - Rename functions about "advertised" ports which are not in fact
1862 guaranteed to return the ports that have been advertised. Closes
1864 - Split implementation of several command line options from
1865 options_init_from_torrc into smaller isolated functions. Patch by
1866 Daniel Pinto. Closes ticket 40102.
1867 - When an extend cell is missing an IPv4 or IPv6 address, fill in
1868 the address from the extend info. This is similar to what was done
1869 in ticket 33633 for ed25519 keys. Closes ticket 33816. Patch by
1872 o Deprecated features:
1873 - The "non-builtin" argument to the "--dump-config" command is now
1874 deprecated. When it works, it behaves the same as "short", which
1875 you should use instead. Closes ticket 33398.
1878 - Replace URLs from our old bugtracker so that they refer to the new
1879 bugtracker and wiki. Closes ticket 40101.
1882 - We no longer ship or build a "tor.service" file for use with
1883 systemd. No distribution included this script unmodified, and we
1884 don't have the expertise ourselves to maintain this in a way that
1885 all the various systemd-based distributions can use. Closes
1887 - We no longer ship support for the Android logging API. Modern
1888 versions of Android can use the syslog API instead. Closes
1890 - The "optimistic data" feature is now always on; there is no longer
1891 an option to disable it from the torrc file or from the consensus
1892 directory. Closes part of 40139.
1893 - The "usecreatefast" network parameter is now removed; there is no
1894 longer an option for authorities to turn it off. Closes part
1898 - Add unit tests for bandwidth statistics manipulation functions.
1899 Closes ticket 33812. Patch by MrSquanchee.
1901 o Code simplification and refactoring (autoconf):
1902 - Remove autoconf checks for unused funcs and headers. Closes ticket
1903 31699; Patch by @bduszel
1905 o Code simplification and refactoring (maintainer scripts):
1906 - Disable by default the pre-commit hook. Use the environment
1907 variable TOR_EXTRA_PRE_COMMIT_CHECKS in order to run it.
1908 Furthermore, stop running practracker in the pre-commit hook and
1909 make check-local. Closes ticket 40019.
1911 o Code simplification and refactoring (relay address):
1912 - Most of IPv4 representation was using "uint32_t". It has now been
1913 moved to use the internal "tor_addr_t" interface instead. This is
1914 so we can properly integrate IPv6 along IPv4 with common
1915 interfaces. Closes ticket 40043.
1917 o Documentation (manual page):
1918 - Move them from doc/ to doc/man/. Closes ticket 40044.
1919 - Describe the status of the "Sandbox" option more accurately. It is
1920 no longer "experimental", but it _is_ dependent on kernel and libc
1921 versions. Closes ticket 23378.
1923 o Documentation (tracing):
1924 - Document in depth the circuit subsystem trace events in the new
1925 doc/tracing/EventsCircuit.md. Closes ticket 40036.
1928 Changes in version 0.4.4.5 - 2020-09-15
1929 Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This
1930 series improves our guard selection algorithms, adds v3 onion balance
1931 support, improves the amount of code that can be disabled when running
1932 without relay support, and includes numerous small bugfixes and
1933 enhancements. It also lays the ground for some IPv6 features that
1934 we'll be developing more in the next (0.4.5) series.
1936 Per our support policy, we support each stable release series for nine
1937 months after its first stable release, or three months after the first
1938 stable release of the next series: whichever is longer. This means
1939 that 0.4.4.x will be supported until around June 2021--or later, if
1940 0.4.5.x is later than anticipated.
1942 Note also that support for 0.4.2.x has just ended; support for 0.4.3
1943 will continue until Feb 15, 2021. We still plan to continue supporting
1944 0.3.5.x, our long-term stable series, until Feb 2022.
1946 Below are the changes since 0.4.4.4-rc. For a complete list of changes
1947 since 0.4.3.6, see the ReleaseNotes file.
1949 o Major bugfixes (onion services, DoS):
1950 - Correct handling of parameters for the onion service DoS defense.
1951 Previously, the consensus parameters for the onion service DoS
1952 defenses were overwriting the parameters set by the service
1953 operator using HiddenServiceEnableIntroDoSDefense. Fixes bug
1954 40109; bugfix on 0.4.2.1-alpha.
1956 o Major bugfixes (stats, onion services):
1957 - Fix a bug where we were undercounting the Tor network's total
1958 onion service traffic, by ignoring any traffic originating from
1959 clients. Now we count traffic from both clients and services.
1960 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1962 o Minor features (control port):
1963 - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an
1964 onion service, display it when we use ONION_CLIENT_AUTH_VIEW.
1965 Closes ticket 40089. Patch by Neel Chauhan.
1967 o Minor features (denial-of-service memory limiter):
1968 - Allow the user to configure even lower values for the
1969 MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB,
1970 when previously the minimum was 256 MB. On clients, there is no
1971 minimum. Relays and clients will both warn if the value is set so
1972 low that Tor is likely to stop working. Closes ticket 24308.
1974 o Minor features (tests):
1975 - Our "make check" target now runs the unit tests in 8 parallel
1976 chunks. Doing this speeds up hardened CI builds by more than a
1977 factor of two. Closes ticket 40098.
1979 o Minor bugfixes (guard selection algorithm):
1980 - Avoid needless guard-related warning when upgrading from 0.4.3 to
1981 0.4.4. Fixes bug 40105; bugfix on 0.4.4.1-alpha.
1983 o Minor bugfixes (tests):
1984 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
1985 on its own. Previously, it would exit with an error. Fixes bug
1986 40099; bugfix on 0.2.8.1-alpha.
1989 Changes in version 0.4.4.3-alpha - 2020-07-27
1990 Tor 0.4.4.3-alpha fixes several annoyances in previous versions,
1991 including one affecting NSS users, and several affecting the Linux
1994 o Major features (fallback directory list):
1995 - Replace the 148 fallback directories originally included in Tor
1996 0.4.1.4-rc (of which around 105 are still functional) with a list
1997 of 144 fallbacks generated in July 2020. Closes ticket 40061.
1999 o Major bugfixes (NSS):
2000 - When running with NSS enabled, make sure that NSS knows to expect
2001 nonblocking sockets. Previously, we set our TCP sockets as
2002 nonblocking, but did not tell NSS, which in turn could lead to
2003 unexpected blocking behavior. Fixes bug 40035; bugfix
2006 o Minor bugfixes (linux seccomp2 sandbox):
2007 - Fix a regression on sandboxing rules for the openat() syscall. The
2008 fix for bug 25440 fixed the problem on systems with glibc >= 2.27
2009 but broke with versions of glibc. We now choose a rule based on
2010 the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
2012 - Makes the seccomp sandbox allow the correct syscall for opendir
2013 according to the running glibc version. This fixes crashes when
2014 reloading torrc with sandbox enabled when running on glibc 2.15 to
2015 2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
2018 o Minor bugfixes (relay, usability):
2019 - Adjust the rules for when to warn about having too many
2020 connections to other relays. Previously we'd tolerate up to 1.5
2021 connections per relay on average. Now we tolerate more connections
2022 for directory authorities, and raise the number of total
2023 connections we need to see before we warn. Fixes bug 33880; bugfix
2027 - Replace most http:// URLs in our code and documentation with
2028 https:// URLs. (We have left unchanged the code in src/ext/, and
2029 the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.
2032 - Our "check-local" test target no longer tries to use the
2033 Coccinelle semantic patching tool parse all the C files. While it
2034 is a good idea to try to make sure Coccinelle works on our C
2035 before we run a Coccinelle patch, doing so on every test run has
2036 proven to be disruptive. You can still run this tool manually with
2037 "make check-cocci". Closes ticket 40030.
2040 Changes in version 0.3.5.11 - 2020-07-09
2041 Tor 0.3.5.11 backports fixes from later tor releases, including several
2042 usability, portability, and reliability fixes.
2044 This release also fixes TROVE-2020-001, a medium-severity denial of
2045 service vulnerability affecting all versions of Tor when compiled with
2046 the NSS encryption library. (This is not the default configuration.)
2047 Using this vulnerability, an attacker could cause an affected Tor
2048 instance to crash remotely. This issue is also tracked as CVE-2020-
2049 15572. Anybody running a version of Tor built with the NSS library
2050 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
2053 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
2054 - Fix a crash due to an out-of-bound memory access when Tor is
2055 compiled with NSS support. Fixes bug 33119; bugfix on
2056 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
2059 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
2060 - Fix a bug that was preventing DoS defenses from running on bridges
2061 with a pluggable transport. Previously, the DoS subsystem was not
2062 given the transport name of the client connection, thus failed to
2063 find the GeoIP cache entry for that client address. Fixes bug
2064 33491; bugfix on 0.3.3.2-alpha.
2066 o Minor features (testing, backport from 0.4.3.4-rc):
2067 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
2068 variable to specify a list of space-separated test cases that
2069 should not be executed. We will use this to disable certain tests
2070 that are failing on Appveyor because of mismatched OpenSSL
2071 libraries. Part of ticket 33643.
2073 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
2074 - Use the correct 64-bit printf format when compiling with MINGW on
2075 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
2077 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
2078 - Warn if the ContactInfo field is not set, and tell the relay
2079 operator that not having a ContactInfo field set might cause their
2080 relay to get rejected in the future. Fixes bug 33361; bugfix
2083 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
2084 - Resume use of preemptively-built circuits when UseEntryGuards is set
2085 to 0. We accidentally disabled this feature with that config
2086 setting, leading to slower load times. Fixes bug 34303; bugfix
2089 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
2090 - Avoid compiler warnings from Clang 10 related to the use of GCC-
2091 style "/* falls through */" comments. Both Clang and GCC allow
2092 __attribute__((fallthrough)) instead, so that's what we're using
2093 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
2095 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
2096 - Fix a compiler warning on platforms with 32-bit time_t values.
2097 Fixes bug 40028; bugfix on 0.3.2.8-rc.
2099 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
2100 - When starting Tor any time after the first time in a process,
2101 register the thread in which it is running as the main thread.
2102 Previously, we only did this on Windows, which could lead to bugs
2103 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
2106 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
2107 - When reading PEM-encoded key data, tolerate CRLF line-endings even
2108 if we are not running on Windows. Previously, non-Windows hosts
2109 would reject these line-endings in certain positions, making
2110 certain key files hard to move from one host to another. Fixes bug
2111 33032; bugfix on 0.3.5.1-alpha.
2113 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
2114 - Downgrade a noisy log message that could occur naturally when
2115 receiving an extrainfo document that we no longer want. Fixes bug
2116 16016; bugfix on 0.2.6.3-alpha.
2118 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
2119 - Remove a BUG() warning that would cause a stack trace if an onion
2120 service descriptor was freed while we were waiting for a
2121 rendezvous circuit to complete. Fixes bug 28992; bugfix
2124 o Testing (CI, backport from 0.4.3.4-rc):
2125 - In our Appveyor Windows CI, copy required DLLs to test and app
2126 directories, before running tor's tests. This ensures that tor.exe
2127 and test*.exe use the correct version of each DLL. This fix is not
2128 required, but we hope it will avoid DLL search issues in future.
2129 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
2130 - On Appveyor, skip the crypto/openssl_version test, which is
2131 failing because of a mismatched library installation. Fix
2135 Changes in version 0.4.2.8 - 2020-07-09
2136 Tor 0.4.2.8 backports various fixes from later releases, including
2137 several that affect usability and portability.
2139 This release also fixes TROVE-2020-001, a medium-severity denial of
2140 service vulnerability affecting all versions of Tor when compiled with
2141 the NSS encryption library. (This is not the default configuration.)
2142 Using this vulnerability, an attacker could cause an affected Tor
2143 instance to crash remotely. This issue is also tracked as CVE-2020-
2144 15572. Anybody running a version of Tor built with the NSS library
2145 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
2148 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
2149 - Fix a crash due to an out-of-bound memory access when Tor is
2150 compiled with NSS support. Fixes bug 33119; bugfix on
2151 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
2154 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
2155 - Fix a bug that was preventing DoS defenses from running on bridges
2156 with a pluggable transport. Previously, the DoS subsystem was not
2157 given the transport name of the client connection, thus failed to
2158 find the GeoIP cache entry for that client address. Fixes bug
2159 33491; bugfix on 0.3.3.2-alpha.
2161 o Minor feature (sendme, flow control, backport form 0.4.3.4-rc):
2162 - Default to sending SENDME version 1 cells. (Clients are already
2163 sending these, because of a consensus parameter telling them to do
2164 so: this change only affects what clients would do if the
2165 consensus didn't contain a recommendation.) Closes ticket 33623.
2167 o Minor features (diagnostic, backport from 0.4.3.3-alpha):
2168 - Improve assertions and add some memory-poisoning code to try to
2169 track down possible causes of a rare crash (32564) in the EWMA
2170 code. Closes ticket 33290.
2172 o Minor features (testing, backport from 0.4.3.4-rc):
2173 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
2174 variable to specify a list of space-separated test cases that
2175 should not be executed. We will use this to disable certain tests
2176 that are failing on Appveyor because of mismatched OpenSSL
2177 libraries. Part of ticket 33643.
2179 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
2180 - Use the correct 64-bit printf format when compiling with MINGW on
2181 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
2183 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
2184 - Warn if the ContactInfo field is not set, and tell the relay
2185 operator that not having a ContactInfo field set might cause their
2186 relay to get rejected in the future. Fixes bug 33361; bugfix
2189 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
2190 - Resume use of preemptively-built circuits when UseEntryGuards is set
2191 to 0. We accidentally disabled this feature with that config
2192 setting, leading to slower load times. Fixes bug 34303; bugfix
2195 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
2196 - Avoid compiler warnings from Clang 10 related to the use of GCC-
2197 style "/* falls through */" comments. Both Clang and GCC allow
2198 __attribute__((fallthrough)) instead, so that's what we're using
2199 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
2200 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
2203 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
2204 - Fix a compiler warning on platforms with 32-bit time_t values.
2205 Fixes bug 40028; bugfix on 0.3.2.8-rc.
2207 o Minor bugfixes (controller protocol, backport from 0.4.3.2-alpha):
2208 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
2209 report them as SIGNAL events. Previously we would log a bug
2210 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
2212 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
2213 - When starting Tor any time after the first time in a process,
2214 register the thread in which it is running as the main thread.
2215 Previously, we only did this on Windows, which could lead to bugs
2216 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
2219 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
2220 - When reading PEM-encoded key data, tolerate CRLF line-endings even
2221 if we are not running on Windows. Previously, non-Windows hosts
2222 would reject these line-endings in certain positions, making
2223 certain key files hard to move from one host to another. Fixes bug
2224 33032; bugfix on 0.3.5.1-alpha.
2226 o Minor bugfixes (logging, backport from 0.4.3.2-rc):
2227 - When logging a bug, do not say "Future instances of this warning
2228 will be silenced" unless we are actually going to silence them.
2229 Previously we would say this whenever a BUG() check failed in the
2230 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
2232 o Minor bugfixes (logging, backport from 0.4.3.4-rc):
2233 - Flush stderr, stdout, and file logs during shutdown, if supported
2234 by the OS. This change helps make sure that any final logs are
2235 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
2237 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
2238 - Downgrade a noisy log message that could occur naturally when
2239 receiving an extrainfo document that we no longer want. Fixes bug
2240 16016; bugfix on 0.2.6.3-alpha.
2242 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
2243 - Remove a BUG() warning that would cause a stack trace if an onion
2244 service descriptor was freed while we were waiting for a
2245 rendezvous circuit to complete. Fixes bug 28992; bugfix
2248 o Testing (CI, backport from 0.4.3.4-rc):
2249 - In our Appveyor Windows CI, copy required DLLs to test and app
2250 directories, before running tor's tests. This ensures that tor.exe
2251 and test*.exe use the correct version of each DLL. This fix is not
2252 required, but we hope it will avoid DLL search issues in future.
2253 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
2254 - On Appveyor, skip the crypto/openssl_version test, which is
2255 failing because of a mismatched library installation. Fix
2259 Changes in version 0.4.3.6 - 2020-07-09
2260 Tor 0.4.3.6 backports several bugfixes from later releases, including
2261 some affecting usability.
2263 This release also fixes TROVE-2020-001, a medium-severity denial of
2264 service vulnerability affecting all versions of Tor when compiled with
2265 the NSS encryption library. (This is not the default configuration.)
2266 Using this vulnerability, an attacker could cause an affected Tor
2267 instance to crash remotely. This issue is also tracked as CVE-2020-
2268 15572. Anybody running a version of Tor built with the NSS library
2269 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
2272 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
2273 - Fix a crash due to an out-of-bound memory access when Tor is
2274 compiled with NSS support. Fixes bug 33119; bugfix on
2275 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
2278 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
2279 - Use the correct 64-bit printf format when compiling with MINGW on
2280 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
2282 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
2283 - Resume use of preemptively-built circuits when UseEntryGuards is set
2284 to 0. We accidentally disabled this feature with that config
2285 setting, leading to slower load times. Fixes bug 34303; bugfix
2288 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
2289 - Fix a compiler warning on platforms with 32-bit time_t values.
2290 Fixes bug 40028; bugfix on 0.3.2.8-rc.
2292 o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha):
2293 - Fix a startup crash when tor is compiled with --enable-nss and
2294 sandbox support is enabled. Fixes bug 34130; bugfix on
2295 0.3.5.1-alpha. Patch by Daniel Pinto.
2297 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
2298 - Downgrade a noisy log message that could occur naturally when
2299 receiving an extrainfo document that we no longer want. Fixes bug
2300 16016; bugfix on 0.2.6.3-alpha.
2302 o Minor bugfixes (manual page, backport from 0.4.4.1-alpha):
2303 - Update the man page to reflect that MinUptimeHidServDirectoryV2
2304 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
2306 o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha):
2307 - Prevent an assert() that would occur when cleaning the client
2308 descriptor cache, and attempting to close circuits for a non-
2309 decrypted descriptor (lacking client authorization). Fixes bug
2310 33458; bugfix on 0.4.2.1-alpha.
2312 o Minor bugfixes (portability, backport from 0.4.4.1-alpha):
2313 - Fix a portability error in the configure script, where we were
2314 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
2316 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
2317 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
2318 descriptors, when the IPv6 port was configured as "auto". Fixes
2319 bug 32588; bugfix on 0.2.3.9-alpha.
2321 o Documentation (backport from 0.4.4.1-alpha):
2322 - Fix several doxygen warnings related to imbalanced groups. Closes
2326 Changes in version 0.4.4.2-alpha - 2020-07-09
2327 This is the second alpha release in the 0.4.4.x series. It fixes a few
2328 bugs in the previous release, and solves a few usability,
2329 compatibility, and portability issues.
2331 This release also fixes TROVE-2020-001, a medium-severity denial of
2332 service vulnerability affecting all versions of Tor when compiled with
2333 the NSS encryption library. (This is not the default configuration.)
2334 Using this vulnerability, an attacker could cause an affected Tor
2335 instance to crash remotely. This issue is also tracked as CVE-2020-
2336 15572. Anybody running a version of Tor built with the NSS library
2337 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
2340 o Major bugfixes (NSS, security):
2341 - Fix a crash due to an out-of-bound memory access when Tor is
2342 compiled with NSS support. Fixes bug 33119; bugfix on
2343 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
2346 o Minor features (bootstrap reporting):
2347 - Report more detailed reasons for bootstrap failure when the
2348 failure happens due to a TLS error. Previously we would just call
2349 these errors "MISC" when they happened during read, and "DONE"
2350 when they happened during any other TLS operation. Closes
2353 o Minor features (directory authority):
2354 - Authorities now recommend the protocol versions that are supported
2355 by Tor 0.3.5 and later. (Earlier versions of Tor have been
2356 deprecated since January of this year.) This recommendation will
2357 cause older clients and relays to give a warning on startup, or
2358 when they download a consensus directory. Closes ticket 32696.
2360 o Minor features (entry guards):
2361 - Reinstate support for GUARD NEW/UP/DOWN control port events.
2362 Closes ticket 40001.
2364 o Minor features (linux seccomp2 sandbox, portability):
2365 - Allow Tor to build on platforms where it doesn't know how to
2366 report which syscall caused the linux seccomp2 sandbox to fail.
2367 This change should make the sandbox code more portable to less
2368 common Linux architectures. Closes ticket 34382.
2369 - Permit the unlinkat() syscall, which some Libc implementations use
2370 to implement unlink(). Closes ticket 33346.
2372 o Minor bugfix (CI, Windows):
2373 - Use the correct 64-bit printf format when compiling with MINGW on
2374 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
2376 o Minor bugfix (onion service v3 client):
2377 - Remove a BUG() warning that could occur naturally. Fixes bug
2378 34087; bugfix on 0.3.2.1-alpha.
2380 o Minor bugfix (SOCKS, onion service client):
2381 - Detect v3 onion service addresses of the wrong length when
2382 returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix
2385 o Minor bugfixes (compiler warnings):
2386 - Fix a compiler warning on platforms with 32-bit time_t values.
2387 Fixes bug 40028; bugfix on 0.3.2.8-rc.
2389 o Minor bugfixes (control port, onion service):
2390 - Consistently use 'address' in "Invalid v3 address" response to
2391 ONION_CLIENT_AUTH commands. Previously, we would sometimes say
2392 'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha.
2394 o Minor bugfixes (logging):
2395 - Downgrade a noisy log message that could occur naturally when
2396 receiving an extrainfo document that we no longer want. Fixes bug
2397 16016; bugfix on 0.2.6.3-alpha.
2399 o Minor bugfixes (onion services v3):
2400 - Avoid a non-fatal assertion failure in certain edge-cases when
2401 opening an intro circuit as a client. Fixes bug 34084; bugfix
2404 o Deprecated features (onion service v2):
2405 - Add a deprecation warning for version 2 onion services. Closes
2408 o Removed features (IPv6, revert):
2409 - Revert the change in the default value of ClientPreferIPv6OrPort:
2410 it breaks the torsocks use case. The SOCKS resolve command has no
2411 mechanism to ask for a specific address family (v4 or v6), and so
2412 prioritizing IPv6 when an IPv4 address is requested on the SOCKS
2413 interface resulted in a failure. Tor Browser explicitly sets
2414 PreferIPv6, so this should not affect the majority of our users.
2415 Closes ticket 33796; bugfix on 0.4.4.1-alpha.
2418 Changes in version 0.4.4.1-alpha - 2020-06-16
2419 This is the first alpha release in the 0.4.4.x series. It improves
2420 our guard selection algorithms, improves the amount of code that
2421 can be disabled when running without relay support, and includes numerous
2422 small bugfixes and enhancements. It also lays the ground for some IPv6
2423 features that we'll be developing more in the next (0.4.5) series.
2425 Here are the changes since 0.4.3.5.
2427 o Major features (Proposal 310, performance + security):
2428 - Implements Proposal 310, "Bandaid on guard selection". Proposal
2429 310 solves load-balancing issues with older versions of the guard
2430 selection algorithm, and improves its security. Under this new
2431 algorithm, a newly selected guard never becomes Primary unless all
2432 previously sampled guards are unreachable. Implements
2433 recommendation from 32088. (Proposal 310 is linked to the CLAPS
2434 project researching optimal client location-aware path selections.
2435 This project is a collaboration between the UCLouvain Crypto Group,
2436 the U.S. Naval Research Laboratory, and Princeton University.)
2438 o Major features (IPv6, relay):
2439 - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol
2440 warning if the IPv4 or IPv6 address is an internal address, and
2441 internal addresses are not allowed. But continue to use the other
2442 address, if it is valid. Closes ticket 33817.
2443 - If a relay can extend over IPv4 and IPv6, and both addresses are
2444 provided, it chooses between them uniformly at random. Closes
2446 - Re-use existing IPv6 connections for circuit extends. Closes
2448 - Relays may extend circuits over IPv6, if the relay has an IPv6
2449 ORPort, and the client supplies the other relay's IPv6 ORPort in
2450 the EXTEND2 cell. IPv6 extends will be used by the relay IPv6
2451 ORPort self-tests in 33222. Closes ticket 33817.
2453 o Major features (v3 onion services):
2454 - Allow v3 onion services to act as OnionBalance backend instances,
2455 by using the HiddenServiceOnionBalanceInstance torrc option.
2456 Closes ticket 32709.
2458 o Minor feature (developer tools):
2459 - Add a script to help check the alphabetical ordering of option
2460 names in the manual page. Closes ticket 33339.
2462 o Minor feature (onion service client, SOCKS5):
2463 - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back
2464 new type of onion service connection failures. The semantics of
2465 these error codes are documented in proposal 309. Closes
2468 o Minor feature (onion service v3):
2469 - If a service cannot upload its descriptor(s), log why at INFO
2470 level. Closes ticket 33400; bugfix on 0.3.2.1-alpha.
2472 o Minor feature (python scripts):
2473 - Stop assuming that /usr/bin/python exists. Instead of using a
2474 hardcoded path in scripts that still use Python 2, use
2475 /usr/bin/env, similarly to the scripts that use Python 3. Fixes
2476 bug 33192; bugfix on 0.4.2.
2478 o Minor features (client-only compilation):
2479 - Disable more code related to the ext_orport protocol when
2480 compiling without support for relay mode. Closes ticket 33368.
2481 - Disable more of our self-testing code when support for relay mode
2482 is disabled. Closes ticket 33370.
2484 o Minor features (code safety):
2485 - Check for failures of tor_inet_ntop() and tor_inet_ntoa()
2486 functions in DNS and IP address processing code, and adjust
2487 codepaths to make them less likely to crash entire Tor instances.
2488 Resolves issue 33788.
2490 o Minor features (compilation size):
2491 - Most server-side DNS code is now disabled when building without
2492 support for relay mode. Closes ticket 33366.
2494 o Minor features (continuous integration):
2495 - Run unit-test and integration test (Stem, Chutney) jobs with
2496 ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor.
2497 Resolves ticket 32143.
2499 o Minor features (control port):
2500 - Return a descriptive error message from the 'GETINFO status/fresh-
2501 relay-descs' command on the control port. Previously, we returned
2502 a generic error of "Error generating descriptor". Closes ticket
2503 32873. Patch by Neel Chauhan.
2505 o Minor features (developer tooling):
2506 - Refrain from listing all .a files that are generated by the Tor
2507 build in .gitignore. Add a single wildcard *.a entry that covers
2508 all of them for present and future. Closes ticket 33642.
2509 - Add a script ("git-install-tools.sh") to install git hooks and
2510 helper scripts. Closes ticket 33451.
2512 o Minor features (directory authority, shared random):
2513 - Refactor more authority-only parts of the shared-random scheduling
2514 code to reside in the dirauth module, and to be disabled when
2515 compiling with --disable-module-dirauth. Closes ticket 33436.
2517 o Minor features (directory):
2518 - Remember the number of bytes we have downloaded for each directory
2519 purpose while bootstrapping, and while fully bootstrapped. Log
2520 this information as part of the heartbeat message. Closes
2523 o Minor features (IPv6 support):
2524 - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above
2525 changes and tor_addr_is_null(). Closes ticket 33679. Patch
2527 - Allow clients and relays to send dual-stack and IPv6-only EXTEND2
2528 cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays.
2529 Closes ticket 33901.
2531 o Minor features (logging):
2532 - When trying to find our own address, add debug-level logging to
2533 report the sources of candidate addresses. Closes ticket 32888.
2535 o Minor features (testing, architecture):
2536 - Our test scripts now double-check that subsystem initialization
2537 order is consistent with the inter-module dependencies established
2538 by our .may_include files. Implements ticket 31634.
2539 - Initialize all subsystems at the beginning of our unit test
2540 harness, to avoid crashes due to uninitialized subsystems. Follow-
2541 up from ticket 33316.
2543 o Minor features (v3 onion services):
2544 - Add v3 onion service status to the dumpstats() call which is
2545 triggered by a SIGUSR1 signal. Previously, we only did v2 onion
2546 services. Closes ticket 24844. Patch by Neel Chauhan.
2548 o Minor features (windows):
2549 - Add support for console control signals like Ctrl+C in Windows.
2550 Closes ticket 34211. Patch from Damon Harris (TheDcoder).
2552 o Minor bugfix (onion service v3):
2553 - Prevent an assert() that would occur when cleaning the client
2554 descriptor cache, and attempting to close circuits for a non-
2555 decrypted descriptor (lacking client authorization). Fixes bug
2556 33458; bugfix on 0.4.2.1-alpha.
2558 o Minor bugfix (refactoring):
2559 - Lift circuit_build_times_disabled() out of the
2560 circuit_expire_building() loop, to save CPU time when there are
2561 many circuits open. Fixes bug 33977; bugfix on 0.3.5.9.
2563 o Minor bugfixes (client performance):
2564 - Resume use of preemptively-built circuits when UseEntryGuards is set
2565 to 0. We accidentally disabled this feature with that config
2566 setting, leading to slower load times. Fixes bug 34303; bugfix
2569 o Minor bugfixes (directory authorities):
2570 - Directory authorities now reject votes that arrive too late. In
2571 particular, once an authority has started fetching missing votes,
2572 it no longer accepts new votes posted by other authorities. This
2573 change helps prevent a consensus split, where only some authorities
2574 have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha.
2576 o Minor bugfixes (git scripts):
2577 - Stop executing the checked-out pre-commit hook from the pre-push
2578 hook. Instead, execute the copy in the user's git directory. Fixes
2579 bug 33284; bugfix on 0.4.1.1-alpha.
2581 o Minor bugfixes (initialization):
2582 - Initialize the subsystems in our code in an order more closely
2583 corresponding to their dependencies, so that every system is
2584 initialized before the ones that (theoretically) depend on it.
2585 Fixes bug 33316; bugfix on 0.4.0.1-alpha.
2587 o Minor bugfixes (IPv4, relay):
2588 - Check for invalid zero IPv4 addresses and ports when sending and
2589 receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha.
2591 o Minor bugfixes (IPv6, relay):
2592 - Consider IPv6 addresses when checking if a connection is
2593 canonical. In 17604, relays assumed that a remote relay could
2594 consider an IPv6 connection canonical, but did not set the
2595 canonical flag on their side of the connection. Fixes bug 33899;
2596 bugfix on 0.3.1.1-alpha.
2597 - Log IPv6 addresses on connections where this relay is the
2598 responder. Previously, responding relays would replace the remote
2599 IPv6 address with the IPv4 address from the consensus. Fixes bug
2600 33899; bugfix on 0.3.1.1-alpha.
2602 o Minor bugfixes (linux seccomp sandbox nss):
2603 - Fix a startup crash when tor is compiled with --enable-nss and
2604 sandbox support is enabled. Fixes bug 34130; bugfix on
2605 0.3.5.1-alpha. Patch by Daniel Pinto.
2607 o Minor bugfixes (logging, testing):
2608 - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL
2609 and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE()
2610 used to log a non-fatal warning, regardless of the debugging
2611 mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha.
2613 o Minor bugfixes (logs):
2614 - Remove surprising empty line in the INFO-level log about circuit
2615 build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha.
2617 o Minor bugfixes (mainloop):
2618 - Better guard against growing a buffer past its maximum 2GB in
2619 size. Fixes bug 33131; bugfix on 0.3.0.4-rc.
2621 o Minor bugfixes (manual page):
2622 - Update the man page to reflect that MinUptimeHidServDirectoryV2
2623 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
2625 o Minor bugfixes (onion service v3, client):
2626 - Remove a BUG() that was causing a stacktrace when a descriptor
2627 changed at an unexpected time. Fixes bug 28992; bugfix
2630 o Minor bugfixes (onion service, logging):
2631 - Fix a typo in a log message PublishHidServDescriptors is set to 0.
2632 Fixes bug 33779; bugfix on 0.3.2.1-alpha.
2634 o Minor bugfixes (portability):
2635 - Fix a portability error in the configure script, where we were
2636 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
2638 o Minor bugfixes (protocol versions):
2639 - Sort tor's supported protocol version lists, as recommended by the
2640 tor directory specification. Fixes bug 33285; bugfix
2643 o Minor bugfixes (relays):
2644 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
2645 descriptors, when the IPv6 port was configured as "auto". Fixes
2646 bug 32588; bugfix on 0.2.3.9-alpha.
2648 o Code simplification and refactoring:
2649 - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like
2650 TOR_ADDR_BUF_LEN but includes enough space for an IP address,
2651 brackets, separating colon, and port number. Closes ticket 33956.
2652 Patch by Neel Chauhan.
2653 - Merge the orconn and ocirc events into the "core" subsystem, which
2654 manages or connections and origin circuits. Previously they were
2655 isolated in subsystems of their own.
2656 - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency
2657 inversion. Closes ticket 33633.
2658 - Move the circuit extend code to the relay module. Split the
2659 circuit extend function into smaller functions. Closes
2661 - Rewrite port_parse_config() to use the default port flags from
2662 port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee.
2663 - Updated comments in 'scheduler.c' to reflect old code changes, and
2664 simplified the scheduler channel state change code. Closes
2668 - Document the limitations of using %include on config files with
2669 seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on
2670 0.3.1.1-alpha. Patch by Daniel Pinto.
2671 - Fix several doxygen warnings related to imbalanced groups. Closes
2675 - Remove the ClientAutoIPv6ORPort option. This option attempted to
2676 randomly choose between IPv4 and IPv6 for client connections, and
2677 wasn't a true implementation of Happy Eyeballs. Often, this option
2678 failed on IPv4-only or IPv6-only connections. Closes ticket 32905.
2679 Patch by Neel Chauhan.
2680 - Stop shipping contrib/dist/rc.subr file, as it is not being used
2681 on FreeBSD anymore. Closes issue 31576.
2684 - Add a basic IPv6 test to "make test-network". This test only runs
2685 when the local machine has an IPv6 stack. Closes ticket 33300.
2686 - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile.
2687 These jobs run the IPv4-only and dual-stack chutney flavours from
2688 test-network-all. Closes ticket 33280.
2689 - Remove a redundant distcheck job. Closes ticket 33194.
2690 - Run the test-network-ipv6 Makefile target in the Travis CI IPv6
2691 chutney job. This job runs on macOS, so it's a bit slow. Closes
2693 - Sort the Travis jobs in order of speed. Putting the slowest jobs
2694 first takes full advantage of Travis job concurrency. Closes
2696 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2697 previously configured to fast_finish (which requires
2698 allow_failure), to speed up the build. Closes ticket 33195.
2699 - Test v3 onion services to tor's mixed IPv4 chutney network. And
2700 add a mixed IPv6 chutney network. These networks are used in the
2701 test-network-all, test-network-ipv4, and test-network-ipv6 make
2702 targets. Closes ticket 33334.
2703 - Use the "bridges+hs-v23" chutney network flavour in "make test-
2704 network". This test requires a recent version of chutney (mid-
2705 February 2020). Closes ticket 28208.
2706 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2707 tool to produce detailed diagnostic output. Closes ticket 32792.
2709 o Code simplification and refactoring (onion service):
2710 - Refactor configuration parsing to use the new config subsystem
2711 code. Closes ticket 33014.
2713 o Code simplification and refactoring (relay address):
2714 - Move a series of functions related to address resolving into their
2715 own files. Closes ticket 33789.
2717 o Documentation (manual page):
2718 - Add cross reference links and a table of contents to the HTML tor
2719 manual page. Closes ticket 33369. Work by Swati Thacker as part of
2720 Google Season of Docs.
2721 - Alphabetize the Denial of Service Mitigation Options, Directory
2722 Authority Server Options, Hidden Service Options, and Testing
2723 Network Options sections of the tor(1) manual page. Closes ticket
2724 33275. Work by Swati Thacker as part of Google Season of Docs.
2725 - Refrain from mentioning nicknames in manpage section for MyFamily
2726 torrc option. Resolves issue 33417.
2727 - Updated the options set by TestingTorNetwork in the manual page.
2728 Closes ticket 33778.
2731 Changes in version 0.4.3.5 - 2020-05-15
2732 Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This
2733 series adds support for building without relay code enabled, and
2734 implements functionality needed for OnionBalance with v3 onion
2735 services. It includes significant refactoring of our configuration and
2736 controller functionality, and fixes numerous smaller bugs and
2739 Per our support policy, we support each stable release series for nine
2740 months after its first stable release, or three months after the first
2741 stable release of the next series: whichever is longer. This means
2742 that 0.4.3.x will be supported until around February 2021--later, if
2743 0.4.4.x is later than anticipated.
2745 Note also that support for 0.4.1.x is about to end on May 20 of this
2746 year; 0.4.2.x will be supported until September 15. We still plan to
2747 continue supporting 0.3.5.x, our long-term stable series, until
2750 Below are the changes since 0.4.3.4-rc. For a complete list of changes
2751 since 0.4.2.6, see the ReleaseNotes file.
2753 o Minor bugfixes (compiler compatibility):
2754 - Avoid compiler warnings from Clang 10 related to the use of GCC-
2755 style "/* falls through */" comments. Both Clang and GCC allow
2756 __attribute__((fallthrough)) instead, so that's what we're using
2757 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
2758 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
2761 o Minor bugfixes (logging):
2762 - Stop truncating IPv6 addresses and ports in channel and connection
2763 logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha.
2764 - Fix a logic error in a log message about whether an address was
2765 invalid. Previously, the code would never report that onion
2766 addresses were onion addresses. Fixes bug 34131; bugfix
2770 Changes in version 0.4.3.4-rc - 2020-04-13
2771 Tor 0.4.3.4-rc is the first release candidate in its series. It fixes
2772 several bugs from earlier versions, including one affecting DoS
2773 defenses on bridges using pluggable transports.
2775 o Major bugfixes (DoS defenses, bridges, pluggable transport):
2776 - Fix a bug that was preventing DoS defenses from running on bridges
2777 with a pluggable transport. Previously, the DoS subsystem was not
2778 given the transport name of the client connection, thus failed to
2779 find the GeoIP cache entry for that client address. Fixes bug
2780 33491; bugfix on 0.3.3.2-alpha.
2782 o Minor feature (sendme, flow control):
2783 - Default to sending SENDME version 1 cells. (Clients are already
2784 sending these, because of a consensus parameter telling them to do
2785 so: this change only affects what clients would do if the
2786 consensus didn't contain a recommendation.) Closes ticket 33623.
2788 o Minor features (testing):
2789 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
2790 variable to specify a list of space-separated test cases that
2791 should not be executed. We will use this to disable certain tests
2792 that are failing on Appveyor because of mismatched OpenSSL
2793 libraries. Part of ticket 33643.
2795 o Minor bugfixes (--disable-module-relay):
2796 - Fix an assertion failure when Tor is built without the relay
2797 module, and then invoked with the "User" option. Fixes bug 33668;
2798 bugfix on 0.4.3.1-alpha.
2800 o Minor bugfixes (--disable-module-relay,--disable-module-dirauth):
2801 - Set some output arguments in the relay and dirauth module stubs,
2802 to guard against future stub argument handling bugs like 33668.
2803 Fixes bug 33674; bugfix on 0.4.3.1-alpha.
2805 o Minor bugfixes (build system):
2806 - Correctly output the enabled module in the configure summary.
2807 Before that, the list shown was just plain wrong. Fixes bug 33646;
2808 bugfix on 0.4.3.2-alpha.
2810 o Minor bugfixes (client, IPv6):
2811 - Stop forcing all non-SocksPorts to prefer IPv6 exit connections.
2812 Instead, prefer IPv6 connections by default, but allow users to
2813 change their configs using the "NoPreferIPv6" port flag. Fixes bug
2814 33608; bugfix on 0.4.3.1-alpha.
2815 - Revert PreferIPv6 set by default on the SocksPort because it broke
2816 the torsocks use case. Tor doesn't have a way for an application
2817 to request the hostname to be resolved for a specific IP version,
2818 but torsocks requires that. Up until now, IPv4 was used by default
2819 so torsocks is expecting that, and can't handle a possible IPv6
2820 being returned. Fixes bug 33804; bugfix on 0.4.3.1-alpha.
2822 o Minor bugfixes (key portability):
2823 - When reading PEM-encoded key data, tolerate CRLF line-endings even
2824 if we are not running on Windows. Previously, non-Windows hosts
2825 would reject these line-endings in certain positions, making
2826 certain key files hard to move from one host to another. Fixes bug
2827 33032; bugfix on 0.3.5.1-alpha.
2829 o Minor bugfixes (logging):
2830 - Flush stderr, stdout, and file logs during shutdown, if supported
2831 by the OS. This change helps make sure that any final logs are
2832 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
2833 - Stop closing stderr and stdout during shutdown. Closing these file
2834 descriptors can hide sanitiser logs. Fixes bug 33087; bugfix
2837 o Minor bugfixes (onion services v3):
2838 - Relax severity of a log message that can appear naturally when
2839 decoding onion service descriptors as a relay. Also add some
2840 diagnostics to debug any future bugs in that area. Fixes bug
2841 31669; bugfix on 0.3.0.1-alpha.
2842 - Block a client-side assertion by disallowing the registration of
2843 an x25519 client auth key that's all zeroes. Fixes bug 33545;
2844 bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks".
2846 o Code simplification and refactoring:
2847 - Disable our coding standards best practices tracker in our git
2848 hooks. (0.4.3 branches only.) Closes ticket 33678.
2851 - Avoid conflicts between the fake sockets in tor's unit tests, and
2852 real file descriptors. Resolves issues running unit tests with
2853 GitHub Actions, where the process that embeds or launches the
2854 tests has already opened a large number of file descriptors. Fixes
2855 bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by
2859 - In our Appveyor Windows CI, copy required DLLs to test and app
2860 directories, before running tor's tests. This ensures that tor.exe
2861 and test*.exe use the correct version of each DLL. This fix is not
2862 required, but we hope it will avoid DLL search issues in future.
2863 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
2864 - On Appveyor, skip the crypto/openssl_version test, which is
2865 failing because of a mismatched library installation. Fix
2869 Changes in version 0.4.3.3-alpha - 2020-03-18
2870 Tor 0.4.3.3-alpha fixes several bugs in previous releases, including
2871 TROVE-2020-002, a major denial-of-service vulnerability that affected
2872 all released Tor instances since 0.2.1.5-alpha. Using this
2873 vulnerability, an attacker could cause Tor instances to consume a huge
2874 amount of CPU, disrupting their operations for several seconds or
2875 minutes. This attack could be launched by anybody against a relay, or
2876 by a directory cache against any client that had connected to it. The
2877 attacker could launch this attack as much as they wanted, thereby
2878 disrupting service or creating patterns that could aid in traffic
2879 analysis. This issue was found by OSS-Fuzz, and is also tracked
2882 We do not have reason to believe that this attack is currently being
2883 exploited in the wild, but nonetheless we advise everyone to upgrade
2884 as soon as packages are available.
2886 o Major bugfixes (security, denial-of-service):
2887 - Fix a denial-of-service bug that could be used by anyone to
2888 consume a bunch of CPU on any Tor relay or authority, or by
2889 directories to consume a bunch of CPU on clients or hidden
2890 services. Because of the potential for CPU consumption to
2891 introduce observable timing patterns, we are treating this as a
2892 high-severity security issue. Fixes bug 33119; bugfix on
2893 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
2894 as TROVE-2020-002 and CVE-2020-10592.
2896 o Major bugfixes (circuit padding, memory leak):
2897 - Avoid a remotely triggered memory leak in the case that a circuit
2898 padding machine is somehow negotiated twice on the same circuit.
2899 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
2900 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
2902 o Major bugfixes (directory authority):
2903 - Directory authorities will now send a 503 (not enough bandwidth)
2904 code to clients when under bandwidth pressure. Known relays and
2905 other authorities will always be answered regardless of the
2906 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
2908 o Minor features (diagnostic):
2909 - Improve assertions and add some memory-poisoning code to try to
2910 track down possible causes of a rare crash (32564) in the EWMA
2911 code. Closes ticket 33290.
2913 o Minor features (directory authorities):
2914 - Directory authorities now reject descriptors from relays running
2915 Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is
2916 still allowed. Resolves ticket 32672. Patch by Neel Chauhan.
2918 o Minor features (usability):
2919 - Include more information when failing to parse a configuration
2920 value. This should make it easier to tell what's going wrong when
2921 a configuration file doesn't parse. Closes ticket 33460.
2923 o Minor bugfix (relay, configuration):
2924 - Warn if the ContactInfo field is not set, and tell the relay
2925 operator that not having a ContactInfo field set might cause their
2926 relay to get rejected in the future. Fixes bug 33361; bugfix
2929 o Minor bugfixes (coding best practices checks):
2930 - Allow the "practracker" script to read unicode files when using
2931 Python 2. We made the script use unicode literals in 0.4.3.1-alpha,
2932 but didn't change the codec for opening files. Fixes bug 33374;
2933 bugfix on 0.4.3.1-alpha.
2935 o Minor bugfixes (continuous integration):
2936 - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix
2939 o Minor bugfixes (onion service v3, client):
2940 - Remove a BUG() warning that would cause a stack trace if an onion
2941 service descriptor was freed while we were waiting for a
2942 rendezvous circuit to complete. Fixes bug 28992; bugfix
2945 o Minor bugfixes (onion services v3):
2946 - Fix an assertion failure that could result from a corrupted
2947 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
2948 bugfix on 0.3.3.1-alpha. This issue is also tracked
2951 o Documentation (manpage):
2952 - Alphabetize the Server and Directory server sections of the tor
2953 manpage. Also split Statistics options into their own section of
2954 the manpage. Closes ticket 33188. Work by Swati Thacker as part of
2955 Google Season of Docs.
2956 - Document the __OwningControllerProcess torrc option and specify
2957 its polling interval. Resolves issue 32971.
2959 o Testing (Travis CI):
2960 - Remove a redundant distcheck job. Closes ticket 33194.
2961 - Sort the Travis jobs in order of speed: putting the slowest jobs
2962 first takes full advantage of Travis job concurrency. Closes
2964 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2965 previously configured to fast_finish (which requires
2966 allow_failure), to speed up the build. Closes ticket 33195.
2967 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2968 tool to produce detailed diagnostic output. Closes ticket 32792.
2971 Changes in version 0.4.2.7 - 2020-03-18
2972 This is the third stable release in the 0.4.2.x series. It backports
2973 numerous fixes from later releases, including a fix for TROVE-2020-
2974 002, a major denial-of-service vulnerability that affected all
2975 released Tor instances since 0.2.1.5-alpha. Using this vulnerability,
2976 an attacker could cause Tor instances to consume a huge amount of CPU,
2977 disrupting their operations for several seconds or minutes. This
2978 attack could be launched by anybody against a relay, or by a directory
2979 cache against any client that had connected to it. The attacker could
2980 launch this attack as much as they wanted, thereby disrupting service
2981 or creating patterns that could aid in traffic analysis. This issue
2982 was found by OSS-Fuzz, and is also tracked as CVE-2020-10592.
2984 We do not have reason to believe that this attack is currently being
2985 exploited in the wild, but nonetheless we advise everyone to upgrade
2986 as soon as packages are available.
2988 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
2989 - Fix a denial-of-service bug that could be used by anyone to
2990 consume a bunch of CPU on any Tor relay or authority, or by
2991 directories to consume a bunch of CPU on clients or hidden
2992 services. Because of the potential for CPU consumption to
2993 introduce observable timing patterns, we are treating this as a
2994 high-severity security issue. Fixes bug 33119; bugfix on
2995 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
2996 as TROVE-2020-002 and CVE-2020-10592.
2998 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
2999 - Avoid a remotely triggered memory leak in the case that a circuit
3000 padding machine is somehow negotiated twice on the same circuit.
3001 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
3002 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
3004 o Major bugfixes (directory authority, backport from 0.4.3.3-alpha):
3005 - Directory authorities will now send a 503 (not enough bandwidth)
3006 code to clients when under bandwidth pressure. Known relays and
3007 other authorities will always be answered regardless of the
3008 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
3010 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
3011 - Stop allowing failures on the Travis CI stem tests job. It looks
3012 like all the stem hangs we were seeing before are now fixed.
3013 Closes ticket 33075.
3015 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
3016 - Lowercase the configured value of BridgeDistribution before adding
3017 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
3019 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
3020 - If we encounter a bug when flushing a buffer to a TLS connection,
3021 only log the bug once per invocation of the Tor process.
3022 Previously we would log with every occurrence, which could cause
3023 us to run out of disk space. Fixes bug 33093; bugfix
3026 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
3027 - Fix an assertion failure that could result from a corrupted
3028 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3029 bugfix on 0.3.3.1-alpha. This issue is also tracked
3032 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
3033 - Fix a syntax warning given by newer versions of Rust that was
3034 creating problems for our continuous integration. Fixes bug 33212;
3035 bugfix on 0.3.5.1-alpha.
3037 o Testing (Travis CI, backport from 0.4.3.3-alpha):
3038 - Remove a redundant distcheck job. Closes ticket 33194.
3039 - Sort the Travis jobs in order of speed: putting the slowest jobs
3040 first takes full advantage of Travis job concurrency. Closes
3042 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3043 previously configured to fast_finish (which requires
3044 allow_failure), to speed up the build. Closes ticket 33195.
3045 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3046 tool to produce detailed diagnostic output. Closes ticket 32792.
3049 Changes in version 0.4.1.9 - 2020-03-18
3050 Tor 0.4.1.9 backports important fixes from later Tor releases,
3051 including a fix for TROVE-2020-002, a major denial-of-service
3052 vulnerability that affected all released Tor instances since
3053 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor
3054 instances to consume a huge amount of CPU, disrupting their operations
3055 for several seconds or minutes. This attack could be launched by
3056 anybody against a relay, or by a directory cache against any client
3057 that had connected to it. The attacker could launch this attack as
3058 much as they wanted, thereby disrupting service or creating patterns
3059 that could aid in traffic analysis. This issue was found by OSS-Fuzz,
3060 and is also tracked as CVE-2020-10592.
3062 We do not have reason to believe that this attack is currently being
3063 exploited in the wild, but nonetheless we advise everyone to upgrade
3064 as soon as packages are available.
3066 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
3067 - Fix a denial-of-service bug that could be used by anyone to
3068 consume a bunch of CPU on any Tor relay or authority, or by
3069 directories to consume a bunch of CPU on clients or hidden
3070 services. Because of the potential for CPU consumption to
3071 introduce observable timing patterns, we are treating this as a
3072 high-severity security issue. Fixes bug 33119; bugfix on
3073 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3074 as TROVE-2020-002 and CVE-2020-10592.
3076 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
3077 - Avoid a remotely triggered memory leak in the case that a circuit
3078 padding machine is somehow negotiated twice on the same circuit.
3079 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
3080 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
3082 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
3083 - Lowercase the configured value of BridgeDistribution before adding
3084 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
3086 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
3087 - If we encounter a bug when flushing a buffer to a TLS connection,
3088 only log the bug once per invocation of the Tor process.
3089 Previously we would log with every occurrence, which could cause
3090 us to run out of disk space. Fixes bug 33093; bugfix
3093 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
3094 - Fix an assertion failure that could result from a corrupted
3095 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3096 bugfix on 0.3.3.1-alpha. This issue is also tracked
3099 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
3100 - Fix a syntax warning given by newer versions of Rust that was
3101 creating problems for our continuous integration. Fixes bug 33212;
3102 bugfix on 0.3.5.1-alpha.
3104 o Testing (Travis CI, backport from 0.4.3.3-alpha):
3105 - Remove a redundant distcheck job. Closes ticket 33194.
3106 - Sort the Travis jobs in order of speed: putting the slowest jobs
3107 first takes full advantage of Travis job concurrency. Closes
3109 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3110 previously configured to fast_finish (which requires
3111 allow_failure), to speed up the build. Closes ticket 33195.
3112 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3113 tool to produce detailed diagnostic output. Closes ticket 32792.
3116 Changes in version 0.3.5.10 - 2020-03-18
3117 Tor 0.3.5.10 backports many fixes from later Tor releases, including a
3118 fix for TROVE-2020-002, a major denial-of-service vulnerability that
3119 affected all released Tor instances since 0.2.1.5-alpha. Using this
3120 vulnerability, an attacker could cause Tor instances to consume a huge
3121 amount of CPU, disrupting their operations for several seconds or
3122 minutes. This attack could be launched by anybody against a relay, or
3123 by a directory cache against any client that had connected to it. The
3124 attacker could launch this attack as much as they wanted, thereby
3125 disrupting service or creating patterns that could aid in traffic
3126 analysis. This issue was found by OSS-Fuzz, and is also tracked
3129 We do not have reason to believe that this attack is currently being
3130 exploited in the wild, but nonetheless we advise everyone to upgrade
3131 as soon as packages are available.
3133 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
3134 - Fix a denial-of-service bug that could be used by anyone to
3135 consume a bunch of CPU on any Tor relay or authority, or by
3136 directories to consume a bunch of CPU on clients or hidden
3137 services. Because of the potential for CPU consumption to
3138 introduce observable timing patterns, we are treating this as a
3139 high-severity security issue. Fixes bug 33119; bugfix on
3140 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3141 as TROVE-2020-002 and CVE-2020-10592.
3143 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
3144 - Correct how we use libseccomp. Particularly, stop assuming that
3145 rules are applied in a particular order or that more rules are
3146 processed after the first match. Neither is the case! In
3147 libseccomp <2.4.0 this lead to some rules having no effect.
3148 libseccomp 2.4.0 changed how rules are generated, leading to a
3149 different ordering, which in turn led to a fatal crash during
3150 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
3153 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
3154 - Stop allowing failures on the Travis CI stem tests job. It looks
3155 like all the stem hangs we were seeing before are now fixed.
3156 Closes ticket 33075.
3158 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
3159 - Lowercase the configured value of BridgeDistribution before adding
3160 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
3162 o Minor bugfixes (crash, backport from 0.4.2.4-rc):
3163 - When running Tor with an option like --verify-config or
3164 --dump-config that does not start the event loop, avoid crashing
3165 if we try to exit early because of an error. Fixes bug 32407;
3166 bugfix on 0.3.3.1-alpha.
3168 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
3169 - If we encounter a bug when flushing a buffer to a TLS connection,
3170 only log the bug once per invocation of the Tor process.
3171 Previously we would log with every occurrence, which could cause
3172 us to run out of disk space. Fixes bug 33093; bugfix
3175 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
3176 - Fix an assertion failure that could result from a corrupted
3177 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3178 bugfix on 0.3.3.1-alpha. This issue is also tracked
3181 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
3182 - Fix a syntax warning given by newer versions of Rust that was
3183 creating problems for our continuous integration. Fixes bug 33212;
3184 bugfix on 0.3.5.1-alpha.
3186 o Testing (backport from 0.4.3.1-alpha):
3187 - Re-enable the Travis CI macOS Chutney build, but don't let it
3188 prevent the Travis job from finishing. (The Travis macOS jobs are
3189 slow, so we don't want to have it delay the whole CI process.)
3190 Closes ticket 32629.
3191 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
3192 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
3193 fix the sandbox errors in 32722. Closes ticket 32240.
3195 o Testing (continuous integration, backport from 0.4.3.1-alpha):
3196 - Use zstd in our Travis Linux builds. Closes ticket 32242.
3198 o Testing (Travis CI, backport from 0.4.3.3-alpha):
3199 - Remove a redundant distcheck job. Closes ticket 33194.
3200 - Sort the Travis jobs in order of speed: putting the slowest jobs
3201 first takes full advantage of Travis job concurrency. Closes
3203 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3204 previously configured to fast_finish (which requires
3205 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3206 tool to produce detailed diagnostic output. Closes ticket 32792.
3209 Changes in version 0.4.3.2-alpha - 2020-02-10
3210 This is the second stable alpha release in the Tor 0.4.3.x series. It
3211 fixes several bugs present in the previous alpha release. Anybody
3212 running the previous alpha should upgrade, and look for bugs in this
3215 o Major bugfixes (onion service client, authorization):
3216 - On a NEWNYM signal, purge entries from the ephemeral client
3217 authorization cache. The permanent ones are kept. Fixes bug 33139;
3218 bugfix on 0.4.3.1-alpha.
3220 o Minor features (best practices tracker):
3221 - Practracker now supports a --regen-overbroad option to regenerate
3222 the exceptions file, but only to revise exceptions to be _less_
3223 tolerant of best-practices violations. Closes ticket 32372.
3225 o Minor features (continuous integration):
3226 - Run Doxygen Makefile target on Travis, so we can learn about
3227 regressions in our internal documentation. Closes ticket 32455.
3228 - Stop allowing failures on the Travis CI stem tests job. It looks
3229 like all the stem hangs we were seeing before are now fixed.
3230 Closes ticket 33075.
3232 o Minor bugfixes (build system):
3233 - Revise configure options that were either missing or incorrect in
3234 the configure summary. Fixes bug 32230; bugfix on 0.4.3.1-alpha.
3236 o Minor bugfixes (controller protocol):
3237 - Fix a memory leak introduced by refactoring of control reply
3238 formatting code. Fixes bug 33039; bugfix on 0.4.3.1-alpha.
3239 - Fix a memory leak in GETINFO responses. Fixes bug 33103; bugfix
3241 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
3242 report them as SIGNAL events. Previously we would log a bug
3243 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
3245 o Minor bugfixes (logging):
3246 - If we encounter a bug when flushing a buffer to a TLS connection,
3247 only log the bug once per invocation of the Tor process.
3248 Previously we would log with every occurrence, which could cause
3249 us to run out of disk space. Fixes bug 33093; bugfix
3251 - When logging a bug, do not say "Future instances of this warning
3252 will be silenced" unless we are actually going to silence them.
3253 Previously we would say this whenever a BUG() check failed in the
3254 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
3256 o Minor bugfixes (onion service v2):
3257 - Move a series of v2 onion service warnings to protocol-warning
3258 level because they can all be triggered remotely by a malformed
3259 request. Fixes bug 32706; bugfix on 0.1.1.14-alpha.
3261 o Minor bugfixes (onion service v3, client authorization):
3262 - When removing client authorization credentials using the control
3263 port, also remove the associated descriptor, so the onion service
3264 can no longer be contacted. Fixes bug 33148; bugfix
3267 o Minor bugfixes (pluggable transports):
3268 - When receiving a message on standard error from a pluggable
3269 transport, log it at info level, rather than as a warning. Fixes
3270 bug 33005; bugfix on 0.4.0.1-alpha.
3272 o Minor bugfixes (rust, build):
3273 - Fix a syntax warning given by newer versions of Rust that was
3274 creating problems for our continuous integration. Fixes bug 33212;
3275 bugfix on 0.3.5.1-alpha.
3277 o Minor bugfixes (TLS bug handling):
3278 - When encountering a bug in buf_read_from_tls(), return a "MISC"
3279 error code rather than "WANTWRITE". This change might help avoid
3280 some CPU-wasting loops if the bug is ever triggered. Bug reported
3281 by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha.
3283 o Code simplification and refactoring (mainloop):
3284 - Simplify the ip_address_changed() function by removing redundant
3285 checks. Closes ticket 33091.
3287 o Documentation (manpage):
3288 - Split "Circuit Timeout" options and "Node Selection" options into
3289 their own sections of the tor manpage. Closes tickets 32928 and
3290 32929. Work by Swati Thacker as part of Google Season of Docs.
3293 Changes in version 0.4.2.6 - 2020-01-30
3294 This is the second stable release in the 0.4.2.x series. It backports
3295 several bugfixes from 0.4.3.1-alpha, including some that had affected
3296 the Linux seccomp2 sandbox or Windows services. If you're running with
3297 one of those configurations, you'll probably want to upgrade;
3298 otherwise, you should be fine with 0.4.2.5.
3300 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
3301 - Correct how we use libseccomp. Particularly, stop assuming that
3302 rules are applied in a particular order or that more rules are
3303 processed after the first match. Neither is the case! In
3304 libseccomp <2.4.0 this led to some rules having no effect.
3305 libseccomp 2.4.0 changed how rules are generated, leading to a
3306 different ordering, which in turn led to a fatal crash during
3307 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
3309 - Fix crash when reloading logging configuration while the
3310 experimental sandbox is enabled. Fixes bug 32841; bugfix on
3311 0.4.1.7. Patch by Peter Gerber.
3313 o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha):
3314 - Use GCC/Clang's printf-checking feature to make sure that
3315 tor_assertf() arguments are correctly typed. Fixes bug 32765;
3316 bugfix on 0.4.1.1-alpha.
3318 o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha):
3319 - Avoid a possible crash when trying to log a (fatal) assertion
3320 failure about mismatched magic numbers in configuration objects.
3321 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
3323 o Minor bugfixes (testing, backport from 0.4.3.1-alpha):
3324 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
3325 test_practracker.sh script. Doing so caused a test failure. Fixes
3326 bug 32705; bugfix on 0.4.2.1-alpha.
3327 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
3328 skipping practracker checks. Fixes bug 32705; bugfix
3331 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
3332 - Initialize the publish/subscribe system when running as a windows
3333 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
3335 o Testing (backport from 0.4.3.1-alpha):
3336 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
3337 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
3338 fix the sandbox errors in 32722. Closes ticket 32240.
3339 - Re-enable the Travis CI macOS Chutney build, but don't let it
3340 prevent the Travis job from finishing. (The Travis macOS jobs are
3341 slow, so we don't want to have it delay the whole CI process.)
3342 Closes ticket 32629.
3344 o Testing (continuous integration, backport from 0.4.3.1-alpha):
3345 - Use zstd in our Travis Linux builds. Closes ticket 32242.
3348 Changes in version 0.4.1.8 - 2020-01-30
3349 This release backports several bugfixes from later release series,
3350 including some that had affected the Linux seccomp2 sandbox or Windows
3351 services. If you're running with one of those configurations, you'll
3352 probably want to upgrade; otherwise, you should be fine with your
3353 current version of 0.4.1.x.
3355 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
3356 - Correct how we use libseccomp. Particularly, stop assuming that
3357 rules are applied in a particular order or that more rules are
3358 processed after the first match. Neither is the case! In
3359 libseccomp <2.4.0 this led to some rules having no effect.
3360 libseccomp 2.4.0 changed how rules are generated, leading to a
3361 different ordering, which in turn led to a fatal crash during
3362 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
3364 - Fix crash when reloading logging configuration while the
3365 experimental sandbox is enabled. Fixes bug 32841; bugfix on
3366 0.4.1.7. Patch by Peter Gerber.
3368 o Minor bugfixes (crash, backport form 0.4.2.4-rc):
3369 - When running Tor with an option like --verify-config or
3370 --dump-config that does not start the event loop, avoid crashing
3371 if we try to exit early because of an error. Fixes bug 32407;
3372 bugfix on 0.3.3.1-alpha.
3374 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
3375 - Initialize the publish/subscribe system when running as a windows
3376 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
3378 o Testing (backport from 0.4.3.1-alpha):
3379 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
3380 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
3381 fix the sandbox errors in 32722. Closes ticket 32240.
3382 - Re-enable the Travis CI macOS Chutney build, but don't let it
3383 prevent the Travis job from finishing. (The Travis macOS jobs are
3384 slow, so we don't want to have it delay the whole CI process.)
3385 Closes ticket 32629.
3387 o Testing (continuous integration, backport from 0.4.3.1-alpha):
3388 - Use zstd in our Travis Linux builds. Closes ticket 32242.
3391 Changes in version 0.4.3.1-alpha - 2020-01-22
3392 This is the first alpha release in the 0.4.3.x series. It includes
3393 improved support for application integration of onion services, support
3394 for building in a client-only mode, and newly improved internal
3395 documentation (online at https://src-ref.docs.torproject.org/tor/). It
3396 also has numerous other small bugfixes and features, as well as
3397 improvements to our code's internal organization that should help us
3398 write better code in the future.
3400 o New system requirements:
3401 - When building Tor, you now need to have Python 3 in order to run
3402 the integration tests. (Python 2 is officially unsupported
3403 upstream, as of 1 Jan 2020.) Closes ticket 32608.
3405 o Major features (build system):
3406 - The relay code can now be disabled using the --disable-module-relay
3407 configure option. When this option is set, we also disable the
3408 dirauth module. Closes ticket 32123.
3409 - When Tor is compiled --disable-module-relay, we also omit the code
3410 used to act as a directory cache. Closes ticket 32487.
3412 o Major features (directory authority, ed25519):
3413 - Add support for banning a relay's ed25519 keys in the approved-
3414 routers file. This will help us migrate away from RSA keys in the
3415 future. Previously, only RSA keys could be banned in approved-
3416 routers. Resolves ticket 22029. Patch by Neel Chauhan.
3418 o Major features (onion service, controller):
3419 - New control port commands to manage client-side onion service
3420 authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
3421 a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
3422 ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
3424 o Major features (onion service, SOCKS5):
3425 - Introduce a new SocksPort flag, ExtendedErrors, to support more
3426 detailed error codes in information for applications that support
3427 them. Closes ticket 30382; implements proposal 304.
3429 o Major features (proxy):
3430 - In addition to its current supported proxy types (HTTP CONNECT,
3431 SOCKS4, and SOCKS5), Tor can now make its OR connections through a
3432 HAProxy server. A new torrc option was added to specify the
3433 address/port of the server: TCPProxy <protocol> <host>:<port>.
3434 Currently the only supported protocol for the option is haproxy.
3435 Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).
3437 o Major bugfixes (linux seccomp sandbox):
3438 - Correct how we use libseccomp. Particularly, stop assuming that
3439 rules are applied in a particular order or that more rules are
3440 processed after the first match. Neither is the case! In
3441 libseccomp <2.4.0 this led to some rules having no effect.
3442 libseccomp 2.4.0 changed how rules are generated, leading to a
3443 different ordering, which in turn led to a fatal crash during
3444 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
3446 - Fix crash when reloading logging configuration while the
3447 experimental sandbox is enabled. Fixes bug 32841; bugfix on
3448 0.4.1.7. Patch by Peter Gerber.
3450 o Major bugfixes (networking):
3451 - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
3452 and accept strings as well as binary addresses. Fixes bug 32315;
3453 bugfix on 0.3.5.1-alpha.
3455 o Major bugfixes (onion service):
3456 - Report HS circuit failure back into the HS subsystem so we take
3457 appropriate action with regards to the client introduction point
3458 failure cache. This improves reachability of onion services, since
3459 now clients notice failing introduction circuits properly. Fixes
3460 bug 32020; bugfix on 0.3.2.1-alpha.
3462 o Minor feature (configure, build system):
3463 - Output a list of enabled/disabled features at the end of the
3464 configure process in a pleasing way. Closes ticket 31373.
3466 o Minor feature (heartbeat, onion service):
3467 - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
3468 message. Closes ticket 31371.
3470 o Minor features (configuration validation):
3471 - Configuration validation can now be done by per-module callbacks,
3472 rather than a global validation function. This will let us reduce
3473 the size of config.c and some of its more cumbersome functions.
3474 Closes ticket 31241.
3476 o Minor features (configuration):
3477 - If a configured hardware crypto accelerator in AccelName is
3478 prefixed with "!", Tor now exits when it cannot be found. Closes
3480 - We now use flag-driven logic to warn about obsolete configuration
3481 fields, so that we can include their names. In 0.4.2, we used a
3482 special type, which prevented us from generating good warnings.
3483 Implements ticket 32404.
3485 o Minor features (controller):
3486 - Add stream isolation data to STREAM event. Closes ticket 19859.
3487 - Implement a new GETINFO command to fetch microdescriptor
3488 consensus. Closes ticket 31684.
3490 o Minor features (debugging, directory system):
3491 - Don't crash when we find a non-guard with a guard-fraction value
3492 set. Instead, log a bug warning, in an attempt to figure out how
3493 this happened. Diagnostic for ticket 32868.
3495 o Minor features (defense in depth):
3496 - Add additional checks around tor_vasprintf() usage, in case the
3497 function returns an error. Patch by Tobias Stoeckmann. Fixes
3500 o Minor features (developer tooling):
3501 - Remove the 0.2.9.x series branches from git scripts (git-merge-
3502 forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
3503 Closes ticket 32772.
3505 o Minor features (developer tools):
3506 - Add a check_cocci_parse.sh script that checks that new code is
3507 parseable by Coccinelle. Add an exceptions file for unparseable
3508 files, and run the script from travis CI. Closes ticket 31919.
3509 - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
3510 target. Closes ticket 31919.
3511 - Add a rename_c_identifiers.py tool to rename a bunch of C
3512 identifiers at once, and generate a well-formed commit message
3513 describing the change. This should help with refactoring. Closes
3515 - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
3516 semantic patching tool with the correct flags. These flags are
3517 fairly easy to forget, and these scripts should help us use
3518 Coccinelle more effectively in the future. Closes ticket 31705.
3520 o Minor features (Doxygen):
3521 - Update Doxygen configuration file to a more recent template (from
3522 1.8.15). Closes ticket 32110.
3523 - "make doxygen" now works with out-of-tree builds. Closes
3525 - Make sure that doxygen outputs documentation for all of our C
3526 files. Previously, some were missing @file declarations, causing
3527 them to be ignored. Closes ticket 32307.
3528 - Our "make doxygen" target now respects --enable-fatal-warnings by
3529 default, and does not warn about items that are missing
3530 documentation. To warn about missing documentation, run configure
3531 with the "--enable-missing-doc-warnings" flag: doing so suspends
3532 fatal warnings for doxygen. Closes ticket 32385.
3534 o Minor features (git scripts):
3535 - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
3536 customisation. Closes ticket 32347.
3537 - Add git-setup-dirs.sh, which sets up an upstream git repository
3538 and worktrees for tor maintainers. Closes ticket 29603.
3539 - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
3540 remote. Closes ticket 32347.
3541 - Call the check_cocci_parse.sh script from the git commit and push
3542 hooks. Closes ticket 31919.
3543 - Make git-push-all.sh skip unchanged branches when pushing to
3544 upstream. The script already skipped unchanged test branches.
3545 Closes ticket 32216.
3546 - Make git-setup-dirs.sh create a master symlink in the worktree
3547 directory. Closes ticket 32347.
3548 - Skip unmodified source files when doing some existing git hook
3549 checks. Related to ticket 31919.
3551 o Minor features (IPv6, client):
3552 - Make Tor clients tell dual-stack exits that they prefer IPv6
3553 connections. This change is equivalent to setting the PreferIPv6
3554 flag on SOCKSPorts (and most other listener ports). Tor Browser
3555 has been setting this flag for some time, and we want to remove a
3556 client distinguisher at exits. Closes ticket 32637.
3558 o Minor features (portability, android):
3559 - When building for Android, disable some tests that depend on $HOME
3560 and/or pwdb, which Android doesn't have. Closes ticket 32825.
3561 Patch from Hans-Christoph Steiner.
3563 o Minor features (relay modularity):
3564 - Split the relay and server pluggable transport config code into
3565 separate files in the relay module. Disable this code when the
3566 relay module is disabled. Closes part of ticket 32213.
3567 - When the relay module is disabled, reject attempts to set the
3568 ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
3569 ServerTransport* options, rather than ignoring the values of these
3570 options. Closes part of ticket 32213.
3572 o Minor features (relay):
3573 - When the relay module is disabled, change the default config so
3574 that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.
3576 o Minor features (release tools):
3577 - Port our ChangeLog formatting and sorting tools to Python 3.
3578 Closes ticket 32704.
3580 o Minor features (testing):
3581 - Detect some common failure cases for test_parseconf.sh in
3582 src/test/conf_failures. Closes ticket 32451.
3583 - Allow test_parseconf.sh to test expected log outputs for successful
3584 configs, as well as failed configs. Closes ticket 32451.
3585 - The test_parseconf.sh script now supports result variants for any
3586 combination of the optional libraries lzma, nss, and zstd. Closes
3589 o Minor features (tests, Android):
3590 - When running the unit tests on Android, create temporary files in
3591 a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
3592 patch from Hans-Christoph Steiner.
3594 o Minor bugfixes (bridges):
3595 - Lowercase the configured value of BridgeDistribution before adding
3596 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
3598 o Minor bugfixes (build system):
3599 - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
3600 bugfix on 0.4.1.2-alpha.
3602 o Minor bugfixes (configuration handling):
3603 - Make control_event_conf_changed() take in a config_line_t instead
3604 of a smartlist of alternating key/value entries. Fixes bug 31531;
3605 bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
3607 o Minor bugfixes (configuration):
3608 - Check for multiplication overflow when parsing memory units inside
3609 configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
3610 - When dumping the configuration, stop adding a trailing space after
3611 the option name when there is no option value. This issue only
3612 affects options that accept an empty value or list. (Most options
3613 reject empty values, or delete the entire line from the dumped
3614 options.) Fixes bug 32352; bugfix on 0.0.9pre6.
3615 - Avoid changing the user's value of HardwareAccel as stored by
3616 SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
3617 bug 32382; bugfix on 0.2.2.1-alpha.
3618 - When creating a KeyDirectory with the same location as the
3619 DataDirectory (not recommended), respect the DataDirectory's
3620 group-readable setting if one has not been set for the
3621 KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.
3623 o Minor bugfixes (controller):
3624 - In routerstatus_has_changed(), check all the fields that are
3625 output over the control port. Fixes bug 20218; bugfix
3628 o Minor bugfixes (correctness checks):
3629 - Use GCC/Clang's printf-checking feature to make sure that
3630 tor_assertf() arguments are correctly typed. Fixes bug 32765;
3631 bugfix on 0.4.1.1-alpha.
3633 o Minor bugfixes (developer tools):
3634 - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
3635 31336; bugfix on 0.4.1.2-alpha.
3637 o Minor bugfixes (dirauth module):
3638 - Split the dirauth config code into a separate file in the dirauth
3639 module. Disable this code when the dirauth module is disabled.
3640 Closes ticket 32213.
3641 - When the dirauth module is disabled, reject attempts to set the
3642 AuthoritativeDir option, rather than ignoring the value of the
3643 option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.
3645 o Minor bugfixes (embedded Tor):
3646 - When starting Tor any time after the first time in a process,
3647 register the thread in which it is running as the main thread.
3648 Previously, we only did this on Windows, which could lead to bugs
3649 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
3652 o Minor bugfixes (git scripts):
3653 - Avoid sleeping before the last push in git-push-all.sh. Closes
3655 - Forward all unrecognised arguments in git-push-all.sh to git push.
3656 Closes ticket 32216.
3658 o Minor bugfixes (hidden service v3):
3659 - Do not rely on a "circuit established" flag for intro circuits but
3660 instead always query the HS circuit map. This is to avoid sync
3661 issue with that flag and the map. Fixes bug 32094; bugfix
3664 o Minor bugfixes (logging, crash):
3665 - Avoid a possible crash when trying to log a (fatal) assertion
3666 failure about mismatched magic numbers in configuration objects.
3667 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
3669 o Minor bugfixes (onion service v2):
3670 - When sending the INTRO cell for a v2 Onion Service, look at the
3671 failure cache alongside timeout values to check if the intro point
3672 is marked as failed. Previously, we only looked at the relay
3673 timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
3676 o Minor bugfixes (onion services v3, client):
3677 - Properly handle the client rendezvous circuit timeout. Previously
3678 Tor would sometimes timeout a rendezvous circuit awaiting the
3679 introduction ACK, and find itself unable to re-establish all
3680 circuits because the rendezvous circuit timed out too early. Fixes
3681 bug 32021; bugfix on 0.3.2.1-alpha.
3683 o Minor bugfixes (onion services):
3684 - In cancel_descriptor_fetches(), use
3685 connection_list_by_type_purpose() instead of
3686 connection_list_by_type_state(). Fixes bug 32639; bugfix on
3687 0.3.2.1-alpha. Patch by Neel Chauhan.
3689 o Minor bugfixes (scripts):
3690 - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
3691 bugfix on 0.4.0.1-alpha.
3693 o Minor bugfixes (test):
3694 - Use the same code to find the tor binary in all of our test
3695 scripts. This change makes sure we are always using the coverage
3696 binary when coverage is enabled. Fixes bug 32368; bugfix
3699 o Minor bugfixes (testing):
3700 - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
3701 Fixes bug 32468; bugfix on 0.4.2.1-alpha.
3702 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
3703 test_practracker.sh script. Doing so caused a test failure. Fixes
3704 bug 32705; bugfix on 0.4.2.1-alpha.
3705 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
3706 skipping practracker checks. Fixes bug 32705; bugfix
3709 o Minor bugfixes (tests):
3710 - Our option-validation tests no longer depend on specially
3711 configured non-default, non-passing sets of options. Previously,
3712 the tests had been written to assume that options would _not_ be
3713 set to their defaults, which led to needless complexity and
3714 verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.
3716 o Minor bugfixes (windows service):
3717 - Initialize the publish/subscribe system when running as a windows
3718 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
3720 o Deprecated features:
3721 - Deprecate the ClientAutoIPv6ORPort option. This option was not
3722 true "Happy Eyeballs", and often failed on connections that
3723 weren't reliably dual-stack. Closes ticket 32942. Patch by
3727 - Provide a quickstart guide for a Circuit Padding Framework, and
3728 documentation for researchers to implement and study circuit
3729 padding machines. Closes ticket 28804.
3730 - Add documentation in 'HelpfulTools.md' to describe how to build a
3731 tag file. Closes ticket 32779.
3732 - Create a high-level description of the long-term software
3733 architecture goals. Closes ticket 32206.
3734 - Describe the --dump-config command in the manual page. Closes
3736 - Unite coding advice from this_not_that.md in torguts repo into our
3737 coding standards document. Resolves ticket 31853.
3740 - Our Doxygen configuration no longer generates LaTeX output. The
3741 reference manual produced by doing this was over 4000 pages long,
3742 and generally unusable. Closes ticket 32099.
3743 - The option "TestingEstimatedDescriptorPropagationTime" is now
3744 marked as obsolete. It has had no effect since 0.3.0.7, when
3745 clients stopped rejecting consensuses "from the future". Closes
3747 - We no longer support consensus methods before method 28; these
3748 methods were only used by authorities running versions of Tor that
3749 are now at end-of-life. In effect, this means that clients,
3750 relays, and authorities now assume that authorities will be
3751 running version 0.3.5.x or later. Closes ticket 32695.
3754 - Add more test cases for tor's UTF-8 validation function. Also,
3755 check the arguments passed to the function for consistency. Closes
3757 - Improve test coverage for relay and dirauth config code, focusing
3758 on option validation and normalization. Closes ticket 32213.
3759 - Improve the consistency of test_parseconf.sh output, and run all
3760 the tests, even if one fails. Closes ticket 32213.
3761 - Re-enable the Travis CI macOS Chutney build, but don't let it
3762 prevent the Travis job from finishing. (The Travis macOS jobs are
3763 slow, so we don't want to have it delay the whole CI process.)
3764 Closes ticket 32629.
3765 - Run the practracker unit tests in the pre-commit git hook. Closes
3767 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
3768 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
3769 fix the sandbox errors in 32722. Closes ticket 32240.
3771 o Code simplification and refactoring (channel):
3772 - Channel layer had a variable length cell handler that was not used
3773 and thus removed. Closes ticket 32892.
3775 o Code simplification and refactoring (configuration):
3776 - Immutability is now implemented as a flag on individual
3777 configuration options rather than as part of the option-transition
3778 checking code. Closes ticket 32344.
3779 - Instead of keeping a list of configuration options to check for
3780 relative paths, check all the options whose type is "FILENAME".
3781 Solves part of ticket 32339.
3782 - Our default log (which ordinarily sends NOTICE-level messages to
3783 standard output) is now handled in a more logical manner.
3784 Previously, we replaced the configured log options if they were
3785 empty. Now, we interpret an empty set of log options as meaning
3786 "use the default log". Closes ticket 31999.
3787 - Remove some unused arguments from the options_validate() function,
3788 to simplify our code and tests. Closes ticket 32187.
3789 - Simplify the options_validate() code so that it looks at the
3790 default options directly, rather than taking default options as an
3791 argument. This change lets us simplify its interface. Closes
3793 - Use our new configuration architecture to move most authority-
3794 related options to the directory authority module. Closes
3796 - When parsing the command line, handle options that determine our
3797 "quiet level" and our mode of operation (e.g., --dump-config and
3798 so on) all in one table. Closes ticket 32003.
3800 o Code simplification and refactoring (controller):
3801 - Create a new abstraction for formatting control protocol reply
3802 lines based on key-value pairs. Refactor some existing control
3803 protocol code to take advantage of this. Closes ticket 30984.
3804 - Create a helper function that can fetch network status or
3805 microdesc consensuses. Closes ticket 31684.
3807 o Code simplification and refactoring (dirauth modularization):
3808 - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
3809 Closes ticket 32163.
3810 - Replace some confusing identifiers in process_descs.c. Closes
3812 - Simplify some relay and dirauth config code. Closes ticket 32213.
3814 o Code simplification and refactoring (misc):
3815 - Make all the structs we declare follow the same naming convention
3816 of ending with "_t". Closes ticket 32415.
3817 - Move and rename some configuration-related code for clarity.
3818 Closes ticket 32304.
3819 - Our include.am files are now broken up by subdirectory.
3820 Previously, src/core/include.am covered all of the subdirectories
3821 in "core", "feature", and "app". Closes ticket 32137.
3822 - Remove underused NS*() macros from test code: they make our tests
3823 more confusing, especially for code-formatting tools. Closes
3826 o Code simplification and refactoring (relay modularization):
3827 - Disable relay_periodic when the relay module is disabled. Closes
3829 - Disable relay_sys when the relay module is disabled. Closes
3832 o Code simplification and refactoring (tool support):
3833 - Add numerous missing dependencies to our include files, so that
3834 they can be included in different reasonable orders and still
3835 compile. Addresses part of ticket 32764.
3836 - Fix some parts of our code that were difficult for Coccinelle to
3837 parse. Related to ticket 31705.
3838 - Fix some small issues in our code that prevented automatic
3839 formatting tools from working. Addresses part of ticket 32764.
3841 o Documentation (manpage):
3842 - Alphabetize the Client Options section of the tor manpage. Closes
3844 - Alphabetize the General Options section of the tor manpage. Closes
3846 - In the tor(1) manpage, reword and improve formatting of the
3847 COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
3848 32277. Based on work by Swati Thacker as part of Google Season
3850 - In the tor(1) manpage, reword and improve formatting of the FILES,
3851 SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
3852 Swati Thacker as part of Google Season of Docs.
3854 o Testing (circuit, EWMA):
3855 - Add unit tests for circuitmux and EWMA subsystems. Closes
3858 o Testing (continuous integration):
3859 - Use zstd in our Travis Linux builds. Closes ticket 32242.
3862 Changes in version 0.4.2.5 - 2019-12-09
3863 This is the first stable release in the 0.4.2.x series. This series
3864 improves reliability and stability, and includes several stability and
3865 correctness improvements for onion services. It also fixes many smaller
3866 bugs present in previous series.
3868 Per our support policy, we will support the 0.4.2.x series for nine
3869 months, or until three months after the release of a stable 0.4.3.x:
3870 whichever is longer. If you need longer-term support, please stick
3871 with 0.3.5.x, which will we plan to support until Feb 2022.
3873 Per our support policy, we will support the 0.4.2.x series for nine
3874 months, or until three months after the release of a stable 0.4.3.x:
3875 whichever is longer. If you need longer-term support, please stick
3876 with 0.3.5.x, which will we plan to support until Feb 2022.
3878 Below are the changes since 0.4.1.4-rc. For a complete list of changes
3879 since 0.4.1.5, see the ReleaseNotes file.
3881 o Minor features (geoip):
3882 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
3883 Country database. Closes ticket 32685.
3886 - Require C99 standards-conforming code in Travis CI, but allow GNU
3887 gcc extensions. Also activates clang's -Wtypedef-redefinition
3888 warnings. Build some jobs with -std=gnu99, and some jobs without.
3889 Closes ticket 32500.
3892 Changes in version 0.4.1.7 - 2019-12-09
3893 This release backports several bugfixes to improve stability and
3894 correctness. Anyone experiencing build problems or crashes with 0.4.1.6,
3895 including all relays relying on AccountingMax, should upgrade.
3897 o Major features (directory authorities, backport from 0.4.2.2-alpha):
3898 - Directory authorities now reject relays running all currently
3899 deprecated release series. The currently supported release series
3900 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
3902 o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha):
3903 - Avoid a possible crash when restarting Tor in embedded mode and
3904 enabling a different set of publish/subscribe messages. Fixes bug
3905 31898; bugfix on 0.4.1.1-alpha.
3907 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
3908 - Relays now respect their AccountingMax bandwidth again. When
3909 relays entered "soft" hibernation (which typically starts when
3910 we've hit 90% of our AccountingMax), we had stopped checking
3911 whether we should enter hard hibernation. Soft hibernation refuses
3912 new connections and new circuits, but the existing circuits can
3913 continue, meaning that relays could have exceeded their configured
3914 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
3916 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
3917 - Stop ignoring torrc options after an %include directive, when the
3918 included directory ends with a file that does not contain any
3919 config options (but does contain comments or whitespace). Fixes
3920 bug 31408; bugfix on 0.3.1.1-alpha.
3922 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
3923 - Onion services now always use the exact number of intro points
3924 configured with the HiddenServiceNumIntroductionPoints option (or
3925 fewer if nodes are excluded). Before, a service could sometimes
3926 pick more intro points than configured. Fixes bug 31548; bugfix
3929 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
3930 - When building on Appveyor and Travis, pass the "-k" flag to make,
3931 so that we are informed of all compilation failures, not just the
3932 first one or two. Closes ticket 31372.
3934 o Minor features (geoip, backport from 0.4.2.5):
3935 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
3936 Country database. Closes ticket 32685.
3938 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
3939 - Avoid spurious errors when Appveyor CI fails before the install step.
3940 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
3942 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
3943 - Fix a BUG() assertion that occurs within a very small race window
3944 between when a client intro circuit opens and when its descriptor
3945 gets cleaned up from the cache. The circuit is now closed early,
3946 which will trigger a re-fetch of the descriptor and continue the
3947 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
3949 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
3950 - Avoid trying to read data from closed connections, which can cause
3951 needless loops in Libevent and infinite loops in Shadow. Fixes bug
3952 30344; bugfix on 0.1.1.1-alpha.
3954 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
3955 - On abort, try harder to flush the output buffers of log messages.
3956 On some platforms (macOS), log messages could be discarded when
3957 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
3958 - Report the tor version whenever an assertion fails. Previously, we
3959 only reported the Tor version on some crashes, and some non-fatal
3960 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
3961 - When tor aborts due to an error, close log file descriptors before
3962 aborting. Closing the logs makes some OSes flush log file buffers,
3963 rather than deleting buffered log lines. Fixes bug 31594; bugfix
3966 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
3967 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
3968 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
3969 - Disable backtrace signal handlers when shutting down tor. Fixes
3970 bug 31614; bugfix on 0.2.5.2-alpha.
3971 - Rate-limit our the logging message about the obsolete .exit
3972 notation. Previously, there was no limit on this warning, which
3973 could potentially be triggered many times by a hostile website.
3974 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
3976 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
3977 - Do not log a nonfatal assertion failure when receiving a VERSIONS
3978 cell on a connection using the obsolete v1 link protocol. Log a
3979 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
3981 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
3982 - Reset the periodic events' "enabled" flag when Tor is shut down
3983 cleanly. Previously, this flag was left on, which caused periodic
3984 events not to be re-enabled when Tor was relaunched in-process
3985 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
3988 o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha):
3989 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
3990 31736; bugfix on 0.0.7.
3992 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
3993 - Remove overly strict assertions that triggered when a pluggable
3994 transport failed to launch. Fixes bug 31091; bugfix
3996 - Remove an assertion in the Unix process backend. This assertion
3997 would trigger when we failed to find the executable for a child
3998 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
4000 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
4001 - Avoid crashing when starting with a corrupt keys directory where
4002 the old ntor key and the new ntor key are identical. Fixes bug
4003 30916; bugfix on 0.2.4.8-alpha.
4005 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
4006 - When testing port rebinding, don't busy-wait for tor to log.
4007 Instead, actually sleep for a short time before polling again.
4008 Also improve the formatting of control commands and log messages.
4009 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
4011 o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha):
4012 - Avoid a map_anon_nofork test failure due to a signed/unsigned
4013 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
4015 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
4016 - Log bugs about the TLS read buffer's length only once, rather than
4017 filling the logs with similar warnings. Fixes bug 31939; bugfix
4020 o Documentation (backport from 0.4.2.2-alpha):
4021 - Explain why we can't destroy the backtrace buffer mutex. Explain
4022 why we don't need to destroy the log mutex. Closes ticket 31736.
4024 o Testing (continuous integration, backport from 0.4.2.3-alpha):
4025 - Disable all but one Travis CI macOS build, to mitigate slow
4026 scheduling of Travis macOS jobs. Closes ticket 32177.
4027 - Run the chutney IPv6 networks as part of Travis CI. Closes
4029 - Simplify the Travis CI build matrix, and optimise for build time.
4030 Closes ticket 31859.
4031 - Use Windows Server 2019 instead of Windows Server 2016 in our
4032 Appveyor builds. Closes ticket 32086.
4034 o Testing (continuous integration, backport from 0.4.2.4-rc):
4035 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
4036 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
4037 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
4038 until we can fix some Bionic permissions issues (see ticket
4039 32240). Related to ticket 31919.
4040 - Install the mingw OpenSSL package in Appveyor. This makes sure
4041 that the OpenSSL headers and libraries match in Tor's Appveyor
4042 builds. (This bug was triggered by an Appveyor image update.)
4043 Fixes bug 32449; bugfix on 0.3.5.6-rc.
4045 o Testing (continuous integration, backport from 0.4.2.5):
4046 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
4047 extensions. Also activates clang's -Wtypedef-redefinition warnings.
4048 Build some jobs with -std=gnu99, and some jobs without.
4049 Closes ticket 32500.
4052 Changes in version 0.4.0.6 - 2019-12-09
4053 This is the second stable release in the 0.4.0.x series. This release
4054 backports several bugfixes to improve stability and correctness. Anyone
4055 experiencing build problems or crashes with 0.4.0.5, including all relays
4056 relying on AccountingMax, should upgrade.
4058 Note that, per our support policy, support for the 0.4.0.x series will end
4059 on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the
4060 latest stable release, or downgrade to 0.3.5.x, which will get long-term
4061 support until 1 Feb 2022.
4063 o Directory authority changes (backport from 0.4.1.5):
4064 - The directory authority "dizum" has a new IP address. Closes
4067 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
4068 - Consider our directory information to have changed when our list
4069 of bridges changes. Previously, Tor would not re-compute the
4070 status of its directory information when bridges changed, and
4071 therefore would not realize that it was no longer able to build
4072 circuits. Fixes part of bug 29875.
4073 - Do not count previously configured working bridges towards our
4074 total of working bridges. Previously, when Tor's list of bridges
4075 changed, it would think that the old bridges were still usable,
4076 and delay fetching router descriptors for the new ones. Fixes part
4077 of bug 29875; bugfix on 0.3.0.1-alpha.
4079 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
4080 - When considering upgrading circuits from "waiting for guard" to
4081 "open", always ignore circuits that are marked for close. Otherwise,
4082 we can end up in the situation where a subsystem is notified that
4083 a closing circuit has just opened, leading to undesirable
4084 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
4086 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
4087 - Properly clean up the introduction point map when circuits change
4088 purpose from onion service circuits to pathbias, measurement, or
4089 other circuit types. This should fix some service-side instances
4090 of introduction point failure. Fixes bug 29034; bugfix
4093 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
4094 - Fix an unreachable bug in which an introduction point could try to
4095 send an INTRODUCE_ACK with a status code that Trunnel would refuse
4096 to encode, leading the relay to assert(). We've consolidated the
4097 ABI values into Trunnel now. Fixes bug 30454; bugfix
4099 - Clients can now handle unknown status codes from INTRODUCE_ACK
4100 cells. (The NACK behavior will stay the same.) This will allow us
4101 to extend status codes in the future without breaking the normal
4102 client behavior. Fixes another part of bug 30454; bugfix
4105 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
4106 - Relays now respect their AccountingMax bandwidth again. When
4107 relays entered "soft" hibernation (which typically starts when
4108 we've hit 90% of our AccountingMax), we had stopped checking
4109 whether we should enter hard hibernation. Soft hibernation refuses
4110 new connections and new circuits, but the existing circuits can
4111 continue, meaning that relays could have exceeded their configured
4112 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
4114 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
4115 - Stop ignoring torrc options after an %include directive, when the
4116 included directory ends with a file that does not contain any
4117 config options (but does contain comments or whitespace). Fixes
4118 bug 31408; bugfix on 0.3.1.1-alpha.
4120 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
4121 - Onion services now always use the exact number of intro points
4122 configured with the HiddenServiceNumIntroductionPoints option (or
4123 fewer if nodes are excluded). Before, a service could sometimes
4124 pick more intro points than configured. Fixes bug 31548; bugfix
4127 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
4128 - Add a "--list-modules" command to print a list of which compile-
4129 time modules are enabled. Closes ticket 30452.
4131 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
4132 - Remove sudo configuration lines from .travis.yml as they are no
4133 longer needed with current Travis build environment. Resolves
4136 o Minor features (continuous integration, backport from 0.4.1.4-rc):
4137 - Our Travis configuration now uses Chutney to run some network
4138 integration tests automatically. Closes ticket 29280.
4140 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
4141 - When building on Appveyor and Travis, pass the "-k" flag to make,
4142 so that we are informed of all compilation failures, not just the
4143 first one or two. Closes ticket 31372.
4145 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
4146 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
4147 in December 2018 (of which ~122 were still functional), with a
4148 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
4149 in June 2019. Closes ticket 28795.
4151 o Minor features (geoip, backport from 0.4.2.5):
4152 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4153 Country database. Closes ticket 32685.
4155 o Minor features (stem tests, backport from 0.4.2.1-alpha):
4156 - Change "make test-stem" so it only runs the stem tests that use
4157 tor. This change makes test-stem faster and more reliable. Closes
4160 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
4161 - Avoid spurious errors when Appveyor CI fails before the install step.
4162 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
4164 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
4165 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
4166 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
4168 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
4169 - Fix a logic error that prevented the SessionGroup sub-option from
4170 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
4172 o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc):
4173 - On relays, properly check that a padding machine is absent before
4174 logging a warning about it being absent. Fixes bug 30649; bugfix
4177 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
4178 - Fix a BUG() assertion that occurs within a very small race window
4179 between when a client intro circuit opens and when its descriptor
4180 gets cleaned up from the cache. The circuit is now closed early,
4181 which will trigger a re-fetch of the descriptor and continue the
4182 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
4184 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
4185 - Don't believe clock skew results from NETINFO cells that appear to
4186 arrive before we sent the VERSIONS cells they are responding to.
4187 Previously, we would accept them up to 3 minutes "in the past".
4188 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
4190 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
4191 - Fix a compilation warning on Windows about casting a function
4192 pointer for GetTickCount64(). Fixes bug 31374; bugfix
4195 o Minor bugfixes (compilation, backport from 0.4.1.5):
4196 - Avoid using labs() on time_t, which can cause compilation warnings
4197 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
4199 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
4200 - Suppress spurious float-conversion warnings from GCC when calling
4201 floating-point classifier functions on FreeBSD. Fixes part of bug
4202 31687; bugfix on 0.3.1.5-alpha.
4204 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
4205 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
4206 due to missing declarations of abort(), and prevent other such
4207 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
4209 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
4210 - Fix a bug that prevented us from supporting SOCKS5 proxies that
4211 want authentication along with configured (but unused!)
4212 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
4214 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
4215 - Avoid trying to read data from closed connections, which can cause
4216 needless loops in Libevent and infinite loops in Shadow. Fixes bug
4217 30344; bugfix on 0.1.1.1-alpha.
4219 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
4220 - Allow the test-stem job to fail in Travis, because it sometimes
4221 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
4222 - Skip test_rebind on macOS in Travis, because it is unreliable on
4223 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
4224 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
4225 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
4227 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
4228 - Avoid a set of possible code paths that could try to use freed
4229 memory in routerlist_free() while Tor was exiting. Fixes bug
4230 31003; bugfix on 0.1.2.2-alpha.
4232 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
4233 - Stop crashing after parsing an unknown descriptor purpose
4234 annotation. We think this bug can only be triggered by modifying a
4235 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
4237 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
4238 - Move the "bandwidth-file-headers" line in directory authority
4239 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
4242 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
4243 - On abort, try harder to flush the output buffers of log messages.
4244 On some platforms (macOS), log messages could be discarded when
4245 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4246 - Report the tor version whenever an assertion fails. Previously, we
4247 only reported the Tor version on some crashes, and some non-fatal
4248 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4250 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
4251 - When extracting an IPv6 address from a PF-based proxy, verify that
4252 we are actually configured to receive an IPv6 address, and log an
4253 internal error if not. Fixes part of bug 31687; bugfix
4256 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
4257 - When tor is missing descriptors for some primary entry guards,
4258 make the log message less alarming. It's normal for descriptors to
4259 expire, as long as tor fetches new ones soon after. Fixes bug
4260 31657; bugfix on 0.3.3.1-alpha.
4262 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
4263 - Do not log a warning when running with an OpenSSL version other
4264 than the one Tor was compiled with, if the two versions should be
4265 compatible. Previously, we would warn whenever the version was
4266 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
4268 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
4269 - Change log level of message "Hash of session info was not as
4270 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
4273 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
4274 - Rate-limit our the logging message about the obsolete .exit
4275 notation. Previously, there was no limit on this warning, which
4276 could potentially be triggered many times by a hostile website.
4277 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
4279 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
4280 - Do not log a nonfatal assertion failure when receiving a VERSIONS
4281 cell on a connection using the obsolete v1 link protocol. Log a
4282 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
4284 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
4285 - Reset the periodic events' "enabled" flag when Tor is shut down
4286 cleanly. Previously, this flag was left on, which caused periodic
4287 events not to be re-enabled when Tor was relaunched in-process
4288 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
4291 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
4292 - Avoid a minor memory leak that could occur on relays when failing
4293 to create a "keys" directory. Fixes bug 30148; bugfix
4296 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
4297 - Fix a trivial memory leak when parsing an invalid value
4298 from a download schedule in the configuration. Fixes bug
4299 30894; bugfix on 0.3.4.1-alpha.
4301 o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha):
4302 - Fix usage of minherit() on NetBSD and other platforms that define
4303 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
4304 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
4306 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
4307 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
4308 implemenation) when failing to load an onion service client
4309 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
4311 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
4312 - When purging the DNS cache because of an out-of-memory condition,
4313 try purging just the older entries at first. Previously, we would
4314 always purge the whole thing. Fixes bug 29617; bugfix
4317 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
4318 - Avoid crashing in our tor_vasprintf() implementation on systems
4319 that define neither vasprintf() nor _vscprintf(). (This bug has
4320 been here long enough that we question whether people are running
4321 Tor on such systems, but we're applying the fix out of caution.)
4322 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
4325 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
4326 - Remove overly strict assertions that triggered when a pluggable
4327 transport failed to launch. Fixes bug 31091; bugfix
4329 - Remove an assertion in the Unix process backend. This assertion
4330 would trigger when we failed to find the executable for a child
4331 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
4333 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
4334 - Avoid crashing when starting with a corrupt keys directory where
4335 the old ntor key and the new ntor key are identical. Fixes bug
4336 30916; bugfix on 0.2.4.8-alpha.
4338 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
4339 - Correctly exclude a redundant rust build job in Travis. Fixes bug
4340 31463; bugfix on 0.3.5.4-alpha.
4342 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
4343 - When testing port rebinding, don't busy-wait for tor to log.
4344 Instead, actually sleep for a short time before polling again.
4345 Also improve the formatting of control commands and log messages.
4346 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
4348 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
4349 - Log bugs about the TLS read buffer's length only once, rather than
4350 filling the logs with similar warnings. Fixes bug 31939; bugfix
4353 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
4354 - Always retry v2 single onion service intro and rend circuits with
4355 a 3-hop path. Previously, v2 single onion services used a 3-hop
4356 path when rendezvous circuits were retried after a remote or
4357 delayed failure, but a 1-hop path for immediate retries. Fixes bug
4358 23818; bugfix on 0.2.9.3-alpha.
4359 - Make v3 single onion services fall back to a 3-hop intro, when all
4360 intro points are unreachable via a 1-hop path. Previously, v3
4361 single onion services failed when all intro nodes were unreachable
4362 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
4364 o Documentation (backport from 0.4.2.1-alpha):
4365 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
4366 notice.html so that operators no longer have to host it
4367 themselves. Closes ticket 31089.
4369 o Testing (backport from 0.4.1.2-alpha):
4370 - Specify torrc paths (with empty files) when launching tor in
4371 integration tests; refrain from reading user and system torrcs.
4372 Resolves issue 29702.
4374 o Testing (continuous integration, backport from 0.4.1.1-alpha):
4375 - In Travis, show stem's tor log after failure. Closes ticket 30234.
4377 o Testing (continuous integration, backport from 0.4.1.5):
4378 - In Travis, make stem log a controller trace to the console, and
4379 tail stem's tor log after failure. Closes ticket 30591.
4380 - In Travis, only run the stem tests that use a tor binary. Closes
4383 o Testing (continuous integration, backport from 0.4.2.3-alpha):
4384 - Disable all but one Travis CI macOS build, to mitigate slow
4385 scheduling of Travis macOS jobs. Closes ticket 32177.
4386 - Run the chutney IPv6 networks as part of Travis CI. Closes
4388 - Simplify the Travis CI build matrix, and optimise for build time.
4389 Closes ticket 31859.
4390 - Use Windows Server 2019 instead of Windows Server 2016 in our
4391 Appveyor builds. Closes ticket 32086.
4393 o Testing (continuous integration, backport from 0.4.2.4-rc):
4394 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
4395 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
4396 until we can fix some Bionic permissions issues (see ticket
4397 32240). Related to ticket 31919.
4398 - Install the mingw OpenSSL package in Appveyor. This makes sure
4399 that the OpenSSL headers and libraries match in Tor's Appveyor
4400 builds. (This bug was triggered by an Appveyor image update.)
4401 Fixes bug 32449; bugfix on 0.3.5.6-rc.
4402 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
4404 o Testing (continuous integration, backport from 0.4.2.5):
4405 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
4406 extensions. Also activates clang's -Wtypedef-redefinition warnings.
4407 Build some jobs with -std=gnu99, and some jobs without.
4408 Closes ticket 32500.
4410 Changes in version 0.3.5.9 - 2019-12-09
4411 Tor 0.3.5.9 backports serveral fixes from later releases, including
4412 several that affect bridge users, relay stability, onion services,
4415 o Directory authority changes (backport from 0.4.1.5):
4416 - The directory authority "dizum" has a new IP address. Closes
4419 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
4420 - Consider our directory information to have changed when our list
4421 of bridges changes. Previously, Tor would not re-compute the
4422 status of its directory information when bridges changed, and
4423 therefore would not realize that it was no longer able to build
4424 circuits. Fixes part of bug 29875.
4425 - Do not count previously configured working bridges towards our
4426 total of working bridges. Previously, when Tor's list of bridges
4427 changed, it would think that the old bridges were still usable,
4428 and delay fetching router descriptors for the new ones. Fixes part
4429 of bug 29875; bugfix on 0.3.0.1-alpha.
4431 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
4432 - When considering upgrading circuits from "waiting for guard" to
4433 "open", always ignore circuits that are marked for close. Otherwise,
4434 we can end up in the situation where a subsystem is notified that
4435 a closing circuit has just opened, leading to undesirable
4436 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
4438 o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc):
4439 - When running with NSS, disable TLS 1.2 ciphersuites that use
4440 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
4441 these ciphersuites don't work -- which caused relays to fail to
4442 handshake with one another when these ciphersuites were enabled.
4443 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
4445 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
4446 - Properly clean up the introduction point map when circuits change
4447 purpose from onion service circuits to pathbias, measurement, or
4448 other circuit types. This should fix some service-side instances
4449 of introduction point failure. Fixes bug 29034; bugfix
4452 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
4453 - Fix an unreachable bug in which an introduction point could try to
4454 send an INTRODUCE_ACK with a status code that Trunnel would refuse
4455 to encode, leading the relay to assert(). We've consolidated the
4456 ABI values into Trunnel now. Fixes bug 30454; bugfix
4458 - Clients can now handle unknown status codes from INTRODUCE_ACK
4459 cells. (The NACK behavior will stay the same.) This will allow us
4460 to extend status codes in the future without breaking the normal
4461 client behavior. Fixes another part of bug 30454; bugfix
4464 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
4465 - Stop ignoring torrc options after an %include directive, when the
4466 included directory ends with a file that does not contain any
4467 config options (but does contain comments or whitespace). Fixes
4468 bug 31408; bugfix on 0.3.1.1-alpha.
4470 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
4471 - Onion services now always use the exact number of intro points
4472 configured with the HiddenServiceNumIntroductionPoints option (or
4473 fewer if nodes are excluded). Before, a service could sometimes
4474 pick more intro points than configured. Fixes bug 31548; bugfix
4477 o Minor features (address selection, backport from 0.4.0.3-alpha):
4478 - Treat the subnet 100.64.0.0/10 as public for some purposes;
4479 private for others. This subnet is the RFC 6598 (Carrier Grade
4480 NAT) IP range, and is deployed by many ISPs as an alternative to
4481 RFC 1918 that does not break existing internal networks. Tor now
4482 blocks SOCKS and control ports on these addresses and warns users
4483 if client ports or ExtORPorts are listening on a RFC 6598 address.
4484 Closes ticket 28525. Patch by Neel Chauhan.
4486 o Minor features (bandwidth authority, backport from 0.4.0.4-rc):
4487 - Make bandwidth authorities ignore relays that are reported in the
4488 bandwidth file with the flag "vote=0". This change allows us to
4489 report unmeasured relays for diagnostic reasons without including
4490 their bandwidth in the bandwidth authorities' vote. Closes
4493 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
4494 - Add a "--list-modules" command to print a list of which compile-
4495 time modules are enabled. Closes ticket 30452.
4497 o Minor features (continuous integration, backport from 0.4.0.4-rc):
4498 - On Travis Rust builds, cleanup Rust registry and refrain from
4499 caching the "target/" directory to speed up builds. Resolves
4502 o Minor features (continuous integration, backport from 0.4.0.5):
4503 - In Travis, tell timelimit to use stem's backtrace signals, and
4504 launch python directly from timelimit, so python receives the
4505 signals from timelimit, rather than make. Closes ticket 30117.
4507 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
4508 - Remove sudo configuration lines from .travis.yml as they are no
4509 longer needed with current Travis build environment. Resolves
4512 o Minor features (continuous integration, backport from 0.4.1.4-rc):
4513 - Our Travis configuration now uses Chutney to run some network
4514 integration tests automatically. Closes ticket 29280.
4516 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
4517 - When building on Appveyor and Travis, pass the "-k" flag to make,
4518 so that we are informed of all compilation failures, not just the
4519 first one or two. Closes ticket 31372.
4521 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
4522 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
4523 in December 2018 (of which ~122 were still functional), with a
4524 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
4525 in June 2019. Closes ticket 28795.
4527 o Minor features (geoip, backport from 0.4.2.5):
4528 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4529 Country database. Closes ticket 32685.
4531 o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc):
4532 - Try to log an error from NSS (if there is any) and a more useful
4533 description of our situation if we are using NSS and a call to
4534 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
4536 o Minor features (stem tests, backport from 0.4.2.1-alpha):
4537 - Change "make test-stem" so it only runs the stem tests that use
4538 tor. This change makes test-stem faster and more reliable. Closes
4541 o Minor bugfixes (security, backport from 0.4.0.4-rc):
4542 - Verify in more places that we are not about to create a buffer
4543 with more than INT_MAX bytes, to avoid possible OOB access in the
4544 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
4545 fixed by Tobias Stoeckmann.
4546 - Fix a potential double free bug when reading huge bandwidth files.
4547 The issue is not exploitable in the current Tor network because
4548 the vulnerable code is only reached when directory authorities
4549 read bandwidth files, but bandwidth files come from a trusted
4550 source (usually the authorities themselves). Furthermore, the
4551 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
4552 which are not used by any of the current authorities. Fixes bug
4553 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
4556 o Minor bugfix (continuous integration, backport from 0.4.0.4-rc):
4557 - Reset coverage state on disk after Travis CI has finished. This
4558 should prevent future coverage merge errors from causing the test
4559 suite for the "process" subsystem to fail. The process subsystem
4560 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
4562 - Terminate test-stem if it takes more than 9.5 minutes to run.
4563 (Travis terminates the job after 10 minutes of no output.)
4564 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
4566 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
4567 - Avoid spurious errors when Appveyor CI fails before the install step.
4568 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
4570 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
4571 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
4572 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
4574 o Minor bugfixes (C correctness, backport from 0.4.0.4-rc):
4575 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
4576 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
4579 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
4580 - Fix a logic error that prevented the SessionGroup sub-option from
4581 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
4583 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
4584 - Fix a BUG() assertion that occurs within a very small race window
4585 between when a client intro circuit opens and when its descriptor
4586 gets cleaned up from the cache. The circuit is now closed early,
4587 which will trigger a re-fetch of the descriptor and continue the
4588 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
4590 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
4591 - Don't believe clock skew results from NETINFO cells that appear to
4592 arrive before we sent the VERSIONS cells they are responding to.
4593 Previously, we would accept them up to 3 minutes "in the past".
4594 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
4596 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
4597 - Fix a compilation warning on Windows about casting a function
4598 pointer for GetTickCount64(). Fixes bug 31374; bugfix
4601 o Minor bugfixes (compilation, backport from 0.4.0.2-alpha):
4602 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
4603 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
4605 o Minor bugfixes (compilation, backport from 0.4.1.5):
4606 - Avoid using labs() on time_t, which can cause compilation warnings
4607 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
4609 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
4610 - Suppress spurious float-conversion warnings from GCC when calling
4611 floating-point classifier functions on FreeBSD. Fixes part of bug
4612 31687; bugfix on 0.3.1.5-alpha.
4614 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
4615 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
4616 due to missing declarations of abort(), and prevent other such
4617 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
4619 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
4620 - Fix a bug that prevented us from supporting SOCKS5 proxies that
4621 want authentication along with configured (but unused!)
4622 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
4624 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
4625 - Avoid trying to read data from closed connections, which can cause
4626 needless loops in Libevent and infinite loops in Shadow. Fixes bug
4627 30344; bugfix on 0.1.1.1-alpha.
4629 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
4630 - Allow the test-stem job to fail in Travis, because it sometimes
4631 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
4632 - Skip test_rebind on macOS in Travis, because it is unreliable on
4633 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
4634 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
4635 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
4637 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
4638 - Avoid a set of possible code paths that could try to use freed
4639 memory in routerlist_free() while Tor was exiting. Fixes bug
4640 31003; bugfix on 0.1.2.2-alpha.
4642 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
4643 - Stop crashing after parsing an unknown descriptor purpose
4644 annotation. We think this bug can only be triggered by modifying a
4645 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
4647 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
4648 - Move the "bandwidth-file-headers" line in directory authority
4649 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
4652 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
4653 - On abort, try harder to flush the output buffers of log messages.
4654 On some platforms (macOS), log messages could be discarded when
4655 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4656 - Report the tor version whenever an assertion fails. Previously, we
4657 only reported the Tor version on some crashes, and some non-fatal
4658 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4660 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
4661 - When extracting an IPv6 address from a PF-based proxy, verify that
4662 we are actually configured to receive an IPv6 address, and log an
4663 internal error if not. Fixes part of bug 31687; bugfix
4666 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
4667 - When tor is missing descriptors for some primary entry guards,
4668 make the log message less alarming. It's normal for descriptors to
4669 expire, as long as tor fetches new ones soon after. Fixes bug
4670 31657; bugfix on 0.3.3.1-alpha.
4672 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
4673 - Avoid logging that we are relaxing a circuit timeout when that
4674 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
4676 o Minor bugfixes (logging, backport from 0.4.0.3-alpha):
4677 - Correct a misleading error message when IPv4Only or IPv6Only is
4678 used but the resolved address can not be interpreted as an address
4679 of the specified IP version. Fixes bug 13221; bugfix on
4680 0.2.3.9-alpha. Patch from Kris Katterjohn.
4681 - Log the correct port number for listening sockets when "auto" is
4682 used to let Tor pick the port number. Previously, port 0 was
4683 logged instead of the actual port number. Fixes bug 29144; bugfix
4684 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
4685 - Stop logging a BUG() warning when Tor is waiting for exit
4686 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
4688 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
4689 - Do not log a warning when running with an OpenSSL version other
4690 than the one Tor was compiled with, if the two versions should be
4691 compatible. Previously, we would warn whenever the version was
4692 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
4694 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
4695 - Change log level of message "Hash of session info was not as
4696 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
4699 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
4700 - Rate-limit our the logging message about the obsolete .exit
4701 notation. Previously, there was no limit on this warning, which
4702 could potentially be triggered many times by a hostile website.
4703 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
4705 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
4706 - Do not log a nonfatal assertion failure when receiving a VERSIONS
4707 cell on a connection using the obsolete v1 link protocol. Log a
4708 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
4710 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
4711 - Reset the periodic events' "enabled" flag when Tor is shut down
4712 cleanly. Previously, this flag was left on, which caused periodic
4713 events not to be re-enabled when Tor was relaunched in-process
4714 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
4717 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
4718 - Avoid a minor memory leak that could occur on relays when failing
4719 to create a "keys" directory. Fixes bug 30148; bugfix
4722 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
4723 - Fix a trivial memory leak when parsing an invalid value
4724 from a download schedule in the configuration. Fixes bug
4725 30894; bugfix on 0.3.4.1-alpha.
4727 o Minor bugfixes (memory management, backport from 0.4.0.3-alpha):
4728 - Refactor the shared random state's memory management so that it
4729 actually takes ownership of the shared random value pointers.
4730 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
4732 o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha):
4733 - Stop leaking parts of the shared random state in the shared-random
4734 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
4736 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
4737 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
4738 implemenation) when failing to load an onion service client
4739 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
4741 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
4742 - When purging the DNS cache because of an out-of-memory condition,
4743 try purging just the older entries at first. Previously, we would
4744 always purge the whole thing. Fixes bug 29617; bugfix
4747 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
4748 - Avoid crashing in our tor_vasprintf() implementation on systems
4749 that define neither vasprintf() nor _vscprintf(). (This bug has
4750 been here long enough that we question whether people are running
4751 Tor on such systems, but we're applying the fix out of caution.)
4752 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
4755 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
4756 - Avoid crashing when starting with a corrupt keys directory where
4757 the old ntor key and the new ntor key are identical. Fixes bug
4758 30916; bugfix on 0.2.4.8-alpha.
4760 o Minor bugfixes (rust, backport from 0.4.0.5):
4761 - Abort on panic in all build profiles, instead of potentially
4762 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
4764 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
4765 - Correctly exclude a redundant rust build job in Travis. Fixes bug
4766 31463; bugfix on 0.3.5.4-alpha.
4768 o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha):
4769 - Allow connections to single onion services to remain idle without
4770 being disconnected. Previously, relays acting as rendezvous points
4771 for single onion services were mistakenly closing idle rendezvous
4772 circuits after 60 seconds, thinking that they were unused
4773 directory-fetching circuits that had served their purpose. Fixes
4774 bug 29665; bugfix on 0.2.1.26.
4776 o Minor bugfixes (stats, backport from 0.4.0.3-alpha):
4777 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
4778 relay and bridge extra-info documents. Fixes bug 29017; bugfix
4781 o Minor bugfixes (testing, backport from 0.4.0.3-alpha):
4782 - Downgrade some LOG_ERR messages in the address/* tests to
4783 warnings. The LOG_ERR messages were occurring when we had no
4784 configured network. We were failing the unit tests, because we
4785 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
4786 29530; bugfix on 0.3.5.8.
4787 - Fix our gcov wrapper script to look for object files at the
4788 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
4790 o Minor bugfixes (testing, backport from 0.4.0.4-rc):
4791 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
4792 recent test-network.sh to use new chutney features in CI. Fixes
4793 bug 29703; bugfix on 0.2.9.1-alpha.
4794 - Fix a test failure on Windows caused by an unexpected "BUG"
4795 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
4798 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
4799 - When testing port rebinding, don't busy-wait for tor to log.
4800 Instead, actually sleep for a short time before polling again.
4801 Also improve the formatting of control commands and log messages.
4802 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
4804 o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc):
4805 - When classifying a client's selection of TLS ciphers, if the
4806 client ciphers are not yet available, do not cache the result.
4807 Previously, we had cached the unavailability of the cipher list
4808 and never looked again, which in turn led us to assume that the
4809 client only supported the ancient V1 link protocol. This, in turn,
4810 was causing Stem integration tests to stall in some cases. Fixes
4811 bug 30021; bugfix on 0.2.4.8-alpha.
4813 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
4814 - Log bugs about the TLS read buffer's length only once, rather than
4815 filling the logs with similar warnings. Fixes bug 31939; bugfix
4818 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
4819 - Always retry v2 single onion service intro and rend circuits with
4820 a 3-hop path. Previously, v2 single onion services used a 3-hop
4821 path when rendezvous circuits were retried after a remote or
4822 delayed failure, but a 1-hop path for immediate retries. Fixes bug
4823 23818; bugfix on 0.2.9.3-alpha.
4824 - Make v3 single onion services fall back to a 3-hop intro, when all
4825 intro points are unreachable via a 1-hop path. Previously, v3
4826 single onion services failed when all intro nodes were unreachable
4827 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
4829 o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha):
4830 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
4831 Windows Server 2012 R2 job. The remaining 2 jobs still provide
4832 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
4833 fast_finish, so failed jobs terminate the build immediately. Fixes
4834 bug 29601; bugfix on 0.3.5.4-alpha.
4836 o Documentation (backport from 0.4.2.1-alpha):
4837 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
4838 notice.html so that operators no longer have to host it
4839 themselves. Closes ticket 31089.
4841 o Testing (backport from 0.4.1.2-alpha):
4842 - Specify torrc paths (with empty files) when launching tor in
4843 integration tests; refrain from reading user and system torrcs.
4844 Resolves issue 29702.
4846 o Testing (continuous integration, backport from 0.4.1.1-alpha):
4847 - In Travis, show stem's tor log after failure. Closes ticket 30234.
4849 o Testing (continuous integration, backport from 0.4.1.5):
4850 - In Travis, make stem log a controller trace to the console, and
4851 tail stem's tor log after failure. Closes ticket 30591.
4852 - In Travis, only run the stem tests that use a tor binary. Closes
4855 o Testing (continuous integration, backport from 0.4.2.3-alpha):
4856 - Disable all but one Travis CI macOS build, to mitigate slow
4857 scheduling of Travis macOS jobs. Closes ticket 32177.
4858 - Run the chutney IPv6 networks as part of Travis CI. Closes
4860 - Simplify the Travis CI build matrix, and optimise for build time.
4861 Closes ticket 31859.
4862 - Use Windows Server 2019 instead of Windows Server 2016 in our
4863 Appveyor builds. Closes ticket 32086.
4865 o Testing (continuous integration, backport from 0.4.2.4-rc):
4866 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
4867 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
4868 until we can fix some Bionic permissions issues (see ticket
4869 32240). Related to ticket 31919.
4870 - Install the mingw OpenSSL package in Appveyor. This makes sure
4871 that the OpenSSL headers and libraries match in Tor's Appveyor
4872 builds. (This bug was triggered by an Appveyor image update.)
4873 Fixes bug 32449; bugfix on 0.3.5.6-rc.
4874 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
4876 o Testing (continuous integration, backport from 0.4.2.5):
4877 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
4878 extensions. Also activates clang's -Wtypedef-redefinition warnings.
4879 Build some jobs with -std=gnu99, and some jobs without.
4880 Closes ticket 32500.
4882 Changes in version 0.4.2.4-rc - 2019-11-15
4883 Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
4884 several bugs from earlier versions, including a few that would result in
4885 stack traces or incorrect behavior.
4887 o Minor features (build system):
4888 - Make pkg-config use --prefix when cross-compiling, if
4889 PKG_CONFIG_PATH is not set. Closes ticket 32191.
4891 o Minor features (geoip):
4892 - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
4893 Country database. Closes ticket 32440.
4895 o Minor bugfixes (client, onion service v3):
4896 - Fix a BUG() assertion that occurs within a very small race window
4897 between when a client intro circuit opens and when its descriptor
4898 gets cleaned up from the cache. The circuit is now closed early,
4899 which will trigger a re-fetch of the descriptor and continue the
4900 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
4902 o Minor bugfixes (code quality):
4903 - Fix "make check-includes" so it runs correctly on out-of-tree
4904 builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
4906 o Minor bugfixes (configuration):
4907 - Log the option name when skipping an obsolete option. Fixes bug
4908 32295; bugfix on 0.4.2.1-alpha.
4910 o Minor bugfixes (crash):
4911 - When running Tor with an option like --verify-config or
4912 --dump-config that does not start the event loop, avoid crashing
4913 if we try to exit early because of an error. Fixes bug 32407;
4914 bugfix on 0.3.3.1-alpha.
4916 o Minor bugfixes (directory):
4917 - When checking if a directory connection is anonymous, test if the
4918 circuit was marked for close before looking at its channel. This
4919 avoids a BUG() stacktrace if the circuit was previously closed.
4920 Fixes bug 31958; bugfix on 0.4.2.1-alpha.
4922 o Minor bugfixes (shellcheck):
4923 - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
4924 32402; bugfix on 0.4.2.1-alpha.
4925 - Start checking most scripts for shellcheck errors again. Fixes bug
4926 32402; bugfix on 0.4.2.1-alpha.
4928 o Testing (continuous integration):
4929 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
4930 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
4931 until we can fix some Bionic permissions issues (see ticket
4932 32240). Related to ticket 31919.
4933 - Install the mingw OpenSSL package in Appveyor. This makes sure
4934 that the OpenSSL headers and libraries match in Tor's Appveyor
4935 builds. (This bug was triggered by an Appveyor image update.)
4936 Fixes bug 32449; bugfix on 0.3.5.6-rc.
4937 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
4940 Changes in version 0.4.2.3-alpha - 2019-10-24
4941 This release fixes several bugs from the previous alpha release, and
4942 from earlier versions of Tor.
4944 o Major bugfixes (relay):
4945 - Relays now respect their AccountingMax bandwidth again. When
4946 relays entered "soft" hibernation (which typically starts when
4947 we've hit 90% of our AccountingMax), we had stopped checking
4948 whether we should enter hard hibernation. Soft hibernation refuses
4949 new connections and new circuits, but the existing circuits can
4950 continue, meaning that relays could have exceeded their configured
4951 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
4953 o Major bugfixes (v3 onion services):
4954 - Onion services now always use the exact number of intro points
4955 configured with the HiddenServiceNumIntroductionPoints option (or
4956 fewer if nodes are excluded). Before, a service could sometimes
4957 pick more intro points than configured. Fixes bug 31548; bugfix
4960 o Minor feature (onion services, control port):
4961 - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
4962 (v3) onion services. Previously it defaulted to RSA1024 (v2).
4963 Closes ticket 29669.
4965 o Minor features (testing):
4966 - When running tests that attempt to look up hostnames, replace the
4967 libc name lookup functions with ones that do not actually touch
4968 the network. This way, the tests complete more quickly in the
4969 presence of a slow or missing DNS resolver. Closes ticket 31841.
4971 o Minor features (testing, continuous integration):
4972 - Disable all but one Travis CI macOS build, to mitigate slow
4973 scheduling of Travis macOS jobs. Closes ticket 32177.
4974 - Run the chutney IPv6 networks as part of Travis CI. Closes
4976 - Simplify the Travis CI build matrix, and optimise for build time.
4977 Closes ticket 31859.
4978 - Use Windows Server 2019 instead of Windows Server 2016 in our
4979 Appveyor builds. Closes ticket 32086.
4981 o Minor bugfixes (build system):
4982 - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
4983 32124; bugfix on 0.3.4.1-alpha.
4984 - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
4986 - Stop failing when jemalloc is requested, but tcmalloc is not
4987 found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
4988 - When pkg-config is not installed, or a library that depends on
4989 pkg-config is not found, tell the user what to do to fix the
4990 problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
4992 o Minor bugfixes (connections):
4993 - Avoid trying to read data from closed connections, which can cause
4994 needless loops in Libevent and infinite loops in Shadow. Fixes bug
4995 30344; bugfix on 0.1.1.1-alpha.
4997 o Minor bugfixes (error handling):
4998 - Always lock the backtrace buffer before it is used. Fixes bug
4999 31734; bugfix on 0.2.5.3-alpha.
5001 o Minor bugfixes (mainloop, periodic events, in-process API):
5002 - Reset the periodic events' "enabled" flag when Tor is shut down
5003 cleanly. Previously, this flag was left on, which caused periodic
5004 events not to be re-enabled when Tor was relaunched in-process
5005 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5008 o Minor bugfixes (process management):
5009 - Remove overly strict assertions that triggered when a pluggable
5010 transport failed to launch. Fixes bug 31091; bugfix
5012 - Remove an assertion in the Unix process backend. This assertion
5013 would trigger when we failed to find the executable for a child
5014 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5016 o Minor bugfixes (testing):
5017 - Avoid intermittent test failures due to a test that had relied on
5018 inconsistent timing sources. Fixes bug 31995; bugfix
5020 - When testing port rebinding, don't busy-wait for tor to log.
5021 Instead, actually sleep for a short time before polling again.
5022 Also improve the formatting of control commands and log messages.
5023 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5025 o Minor bugfixes (tls, logging):
5026 - Log bugs about the TLS read buffer's length only once, rather than
5027 filling the logs with similar warnings. Fixes bug 31939; bugfix
5030 o Minor bugfixes (v3 onion services):
5031 - Fix an implicit conversion from ssize_t to size_t discovered by
5032 Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
5033 - Fix a memory leak in an unlikely error code path when encoding HS
5034 DoS establish intro extension cell. Fixes bug 32063; bugfix
5036 - When cleaning up intro circuits for a v3 onion service, don't
5037 remove circuits that have an established or pending circuit, even
5038 if they ran out of retries. This way, we don't remove a circuit on
5039 its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
5042 - Correct the description of "GuardLifetime". Fixes bug 31189;
5043 bugfix on 0.3.0.1-alpha.
5044 - Make clear in the man page, in both the bandwidth section and the
5045 AccountingMax section, that Tor counts in powers of two, not
5046 powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
5047 bytes. Resolves ticket 32106.
5050 Changes in version 0.4.2.2-alpha - 2019-10-07
5051 This release fixes several bugs from the previous alpha release, and
5052 from earlier versions. It also includes a change in authorities, so
5053 that they begin to reject the currently unsupported release series.
5055 o Major features (directory authorities):
5056 - Directory authorities now reject relays running all currently
5057 deprecated release series. The currently supported release series
5058 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
5060 o Major bugfixes (embedded Tor):
5061 - Avoid a possible crash when restarting Tor in embedded mode and
5062 enabling a different set of publish/subscribe messages. Fixes bug
5063 31898; bugfix on 0.4.1.1-alpha.
5065 o Major bugfixes (torrc parsing):
5066 - Stop ignoring torrc options after an %include directive, when the
5067 included directory ends with a file that does not contain any
5068 config options (but does contain comments or whitespace). Fixes
5069 bug 31408; bugfix on 0.3.1.1-alpha.
5071 o Minor features (auto-formatting scripts):
5072 - When annotating C macros, never generate a line that our check-
5073 spaces script would reject. Closes ticket 31759.
5074 - When annotating C macros, try to remove cases of double-negation.
5075 Closes ticket 31779.
5077 o Minor features (continuous integration):
5078 - When building on Appveyor and Travis, pass the "-k" flag to make,
5079 so that we are informed of all compilation failures, not just the
5080 first one or two. Closes ticket 31372.
5082 o Minor features (geoip):
5083 - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
5084 Country database. Closes ticket 31931.
5086 o Minor features (maintenance scripts):
5087 - Add a Coccinelle script to detect bugs caused by incrementing or
5088 decrementing a variable inside a call to log_debug(). Since
5089 log_debug() is a macro whose arguments are conditionally
5090 evaluated, it is usually an error to do this. One such bug was
5091 30628, in which SENDME cells were miscounted by a decrement
5092 operator inside a log_debug() call. Closes ticket 30743.
5094 o Minor features (onion services v3):
5095 - Assist users who try to setup v2 client authorization in v3 onion
5096 services by pointing them to the right documentation. Closes
5099 o Minor bugfixes (Appveyor continuous integration):
5100 - Avoid spurious errors when Appveyor CI fails before the install
5101 step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5103 o Minor bugfixes (best practices tracker):
5104 - When listing overbroad exceptions, do not also list problems, and
5105 do not list insufficiently broad exceptions. Fixes bug 31338;
5106 bugfix on 0.4.2.1-alpha.
5108 o Minor bugfixes (controller protocol):
5109 - Fix the MAPADDRESS controller command to accept one or more
5110 arguments. Previously, it required two or more arguments, and
5111 ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
5113 o Minor bugfixes (logging):
5114 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
5115 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
5116 - Disable backtrace signal handlers when shutting down tor. Fixes
5117 bug 31614; bugfix on 0.2.5.2-alpha.
5118 - Rate-limit our the logging message about the obsolete .exit
5119 notation. Previously, there was no limit on this warning, which
5120 could potentially be triggered many times by a hostile website.
5121 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5122 - When initialising log domain masks, only set known log domains.
5123 Fixes bug 31854; bugfix on 0.2.1.1-alpha.
5125 o Minor bugfixes (logging, protocol violations):
5126 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5127 cell on a connection using the obsolete v1 link protocol. Log a
5128 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5130 o Minor bugfixes (modules):
5131 - Explain what the optional Directory Authority module is, and what
5132 happens when it is disabled. Fixes bug 31825; bugfix
5135 o Minor bugfixes (multithreading):
5136 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
5137 31736; bugfix on 0.0.7.
5139 o Minor bugfixes (relay):
5140 - Avoid crashing when starting with a corrupt keys directory where
5141 the old ntor key and the new ntor key are identical. Fixes bug
5142 30916; bugfix on 0.2.4.8-alpha.
5144 o Minor bugfixes (tests, SunOS):
5145 - Avoid a map_anon_nofork test failure due to a signed/unsigned
5146 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
5148 o Code simplification and refactoring:
5149 - Refactor connection_control_process_inbuf() to reduce the size of
5150 a practracker exception. Closes ticket 31840.
5151 - Refactor the microdescs_parse_from_string() function into smaller
5152 pieces, for better comprehensibility. Closes ticket 31675.
5153 - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
5154 tests and fuzzers, rather than using hard-coded values. Closes
5156 - Interface for function `decrypt_desc_layer` cleaned up. Closes
5160 - Document the signal-safe logging behaviour in the tor man page.
5161 Also add some comments to the relevant functions. Closes
5163 - Explain why we can't destroy the backtrace buffer mutex. Explain
5164 why we don't need to destroy the log mutex. Closes ticket 31736.
5165 - The Tor source code repository now includes a (somewhat dated)
5166 description of Tor's modular architecture, in doc/HACKING/design.
5167 This is based on the old "tor-guts.git" repository, which we are
5168 adopting and superseding. Closes ticket 31849.
5171 Changes in version 0.4.1.6 - 2019-09-19
5172 This release backports several bugfixes to improve stability and
5173 correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
5174 or experiencing reliability issues with single onion services, should
5177 o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
5178 - Tolerate systems (including some Android installations) where
5179 madvise and MADV_DONTDUMP are available at build-time, but not at
5180 run time. Previously, these systems would notice a failed syscall
5181 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
5182 - Tolerate systems (including some Linux installations) where
5183 madvise and/or MADV_DONTFORK are available at build-time, but not
5184 at run time. Previously, these systems would notice a failed
5185 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
5187 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5188 - Change "make test-stem" so it only runs the stem tests that use
5189 tor. This change makes test-stem faster and more reliable. Closes
5192 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5193 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5194 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5196 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5197 - Add more stub functions to fix compilation on Android with link-
5198 time optimization when --disable-module-dirauth is used.
5199 Previously, these compilation settings would make the compiler
5200 look for functions that didn't exist. Fixes bug 31552; bugfix
5202 - Suppress spurious float-conversion warnings from GCC when calling
5203 floating-point classifier functions on FreeBSD. Fixes part of bug
5204 31687; bugfix on 0.3.1.5-alpha.
5206 o Minor bugfixes (controller protocol):
5207 - Fix the MAPADDRESS controller command to accept one or more
5208 arguments. Previously, it required two or more arguments, and ignored
5209 the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
5211 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5212 - When extracting an IPv6 address from a PF-based proxy, verify that
5213 we are actually configured to receive an IPv6 address, and log an
5214 internal error if not. Fixes part of bug 31687; bugfix
5217 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5218 - When tor is missing descriptors for some primary entry guards,
5219 make the log message less alarming. It's normal for descriptors to
5220 expire, as long as tor fetches new ones soon after. Fixes bug
5221 31657; bugfix on 0.3.3.1-alpha.
5223 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5224 - Change log level of message "Hash of session info was not as
5225 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5228 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5229 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5230 31463; bugfix on 0.3.5.4-alpha.
5232 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5233 - Always retry v2 single onion service intro and rend circuits with
5234 a 3-hop path. Previously, v2 single onion services used a 3-hop
5235 path when rendezvous circuits were retried after a remote or
5236 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5237 23818; bugfix on 0.2.9.3-alpha.
5239 o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
5240 - Always retry v3 single onion service intro and rend circuits with
5241 a 3-hop path. Previously, v3 single onion services used a 3-hop
5242 path when rend circuits were retried after a remote or delayed
5243 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
5244 bugfix on 0.3.2.1-alpha.
5245 - Make v3 single onion services fall back to a 3-hop intro, when all
5246 intro points are unreachable via a 1-hop path. Previously, v3
5247 single onion services failed when all intro nodes were unreachable
5248 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5250 o Documentation (backport from 0.4.2.1-alpha):
5251 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5252 notice.html so that operators no longer have to host it
5253 themselves. Closes ticket 31089.
5256 Changes in version 0.4.2.1-alpha - 2019-09-17
5257 This is the first alpha release in the 0.4.2.x series. It adds new
5258 defenses for denial-of-service attacks against onion services. It also
5259 includes numerous kinds of bugfixes and refactoring to help improve
5260 Tor's stability and ease of development.
5262 o Major features (onion service v3, denial of service):
5263 - Add onion service introduction denial of service defenses. Intro
5264 points can now rate-limit client introduction requests, using
5265 parameters that can be sent by the service within the
5266 ESTABLISH_INTRO cell. If the cell extension for this is not used,
5267 the intro point will honor the consensus parameters. Closes
5270 o Major bugfixes (circuit build, guard):
5271 - When considering upgrading circuits from "waiting for guard" to
5272 "open", always ignore circuits that are marked for close.
5273 Previously we could end up in the situation where a subsystem is
5274 notified of a circuit opening, but the circuit is still marked for
5275 close, leading to undesirable behavior. Fixes bug 30871; bugfix
5278 o Major bugfixes (crash, Linux, Android):
5279 - Tolerate systems (including some Android installations) where
5280 madvise and MADV_DONTDUMP are available at build-time, but not at
5281 run time. Previously, these systems would notice a failed syscall
5282 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
5283 - Tolerate systems (including some Linux installations) where
5284 madvise and/or MADV_DONTFORK are available at build-time, but not
5285 at run time. Previously, these systems would notice a failed
5286 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
5288 o Minor features (best practices tracker):
5289 - Our best-practices tracker now integrates with our include-checker
5290 tool to keep track of how many layering violations we have not yet
5291 fixed. We hope to reduce this number over time to improve Tor's
5292 modularity. Closes ticket 31176.
5293 - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
5294 practracker from the environment. We may want this for continuous
5295 integration. Closes ticket 31309.
5296 - Give a warning rather than an error when a practracker exception
5297 is violated by a small amount, add a --list-overbroad option to
5298 practracker that lists exceptions that are stricter than they need
5299 to be, and provide an environment variable for disabling
5300 practracker. Closes ticket 30752.
5301 - Our best-practices tracker now looks at headers as well as C
5302 files. Closes ticket 31175.
5304 o Minor features (build system):
5305 - Add --disable-manpage and --disable-html-manual options to
5306 configure script. This will enable shortening build times by not
5307 building documentation. Resolves issue 19381.
5309 o Minor features (compilation):
5310 - Log a more useful error message when we are compiling and one of
5311 the compile-time hardening options we have selected can be linked
5312 but not executed. Closes ticket 27530.
5314 o Minor features (configuration):
5315 - The configuration code has been extended to allow splitting
5316 configuration data across multiple objects. Previously, all
5317 configuration data needed to be kept in a single object, which
5318 tended to become bloated. Closes ticket 31240.
5320 o Minor features (continuous integration):
5321 - When running CI builds on Travis, put some random data in
5322 ~/.torrc, to make sure no tests are reading the Tor configuration
5323 file from its default location. Resolves issue 30102.
5325 o Minor features (debugging):
5326 - Log a nonfatal assertion failure if we encounter a configuration
5327 line whose command is "CLEAR" but which has a nonempty value. This
5328 should be impossible, according to the rules of our configuration
5329 line parsing. Closes ticket 31529.
5331 o Minor features (git hooks):
5332 - Our pre-commit git hook now checks for a special file before
5333 running practracker, so that practracker only runs on branches
5334 that are based on master. Since the pre-push hook calls the pre-
5335 commit hook, practracker will also only run before pushes of
5336 branches based on master. Closes ticket 30979.
5338 o Minor features (git scripts):
5339 - Add a "--" command-line argument, to separate git-push-all.sh
5340 script arguments from arguments that are passed through to git
5341 push. Closes ticket 31314.
5342 - Add a -r <remote-name> argument to git-push-all.sh, so the script
5343 can push test branches to a personal remote. Closes ticket 31314.
5344 - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
5345 git-push-all.sh, which makes these scripts create, merge forward,
5346 and push test branches. Closes ticket 31314.
5347 - Add a -u argument to git-merge-forward.sh, so that the script can
5348 re-use existing test branches after a merge failure and fix.
5349 Closes ticket 31314.
5350 - Add a TOR_GIT_PUSH env var, which sets the default git push
5351 command and arguments for git-push-all.sh. Closes ticket 31314.
5352 - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
5353 script push master and maint branches with a delay between each
5354 branch. These delays trigger the CI jobs in a set order, which
5355 should show the most likely failures first. Also make pushes
5356 atomic by default, and make the script pass any command-line
5357 arguments to git push. Closes ticket 29879.
5358 - Call the shellcheck script from the pre-commit hook. Closes
5360 - Skip pushing test branches that are the same as a remote
5361 maint/release/master branch in git-push-all.sh by default. Add a
5362 -s argument, so git-push-all.sh can push all test branches. Closes
5365 o Minor features (IPv6, logging):
5366 - Log IPv6 addresses as well as IPv4 addresses when describing
5367 routerinfos, routerstatuses, and nodes. Closes ticket 21003.
5369 o Minor features (onion service v3):
5370 - Do not allow single hop clients to fetch or post an HS descriptor
5371 from an HSDir. Closes ticket 24964.
5373 o Minor features (onion service):
5374 - Disallow single-hop clients at the introduction point. We've
5375 removed Tor2web support a while back and single-hop rendezvous
5376 attempts are blocked at the relays. This change should remove load
5377 off the network from spammy clients. Close ticket 24963.
5379 o Minor features (stem tests):
5380 - Change "make test-stem" so it only runs the stem tests that use
5381 tor. This change makes test-stem faster and more reliable. Closes
5384 o Minor features (testing):
5385 - Add a script to invoke "tor --dump-config" and "tor
5386 --verify-config" with various configuration options, and see
5387 whether tor's resulting configuration or error messages are what
5388 we expect. Use it for integration testing of our +Option and
5389 /Option flags. Closes ticket 31637.
5390 - Improve test coverage for our existing configuration parsing and
5391 management API. Closes ticket 30893.
5392 - Add integration tests to make sure that practracker gives the
5393 outputs we expect. Closes ticket 31477.
5394 - The practracker self-tests are now run as part of the Tor test
5395 suite. Closes ticket 31304.
5397 o Minor features (token bucket):
5398 - Implement a generic token bucket that uses a single counter, for
5399 use in anti-DoS onion service work. Closes ticket 30687.
5401 o Minor bugfixes (best practices tracker):
5402 - Fix a few issues in the best-practices script, including tests,
5403 tab tolerance, error reporting, and directory-exclusion logic.
5404 Fixes bug 29746; bugfix on 0.4.1.1-alpha.
5405 - When running check-best-practices, only consider files in the src
5406 subdirectory. Previously we had recursively considered all
5407 subdirectories, which made us get confused by the temporary
5408 directories made by "make distcheck". Fixes bug 31578; bugfix
5411 o Minor bugfixes (build system):
5412 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5413 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5415 o Minor bugfixes (chutney, makefiles, documentation):
5416 - "make test-network-all" now shows the warnings from each test-
5417 network.sh run on the console, so developers see new warnings
5418 early. We've also improved the documentation for this feature, and
5419 renamed a Makefile variable so the code is self-documenting. Fixes
5420 bug 30455; bugfix on 0.3.0.4-rc.
5422 o Minor bugfixes (compilation):
5423 - Add more stub functions to fix compilation on Android with link-
5424 time optimization when --disable-module-dirauth is used.
5425 Previously, these compilation settings would make the compiler
5426 look for functions that didn't exist. Fixes bug 31552; bugfix
5428 - Suppress spurious float-conversion warnings from GCC when calling
5429 floating-point classifier functions on FreeBSD. Fixes part of bug
5430 31687; bugfix on 0.3.1.5-alpha.
5432 o Minor bugfixes (configuration):
5433 - Invalid floating-point values in the configuration file are now
5434 treated as errors in the configuration. Previously, they were
5435 ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
5437 o Minor bugfixes (coverity):
5438 - Add an assertion when parsing a BEGIN cell so that coverity can be
5439 sure that we are not about to dereference a NULL address. Fixes
5440 bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
5441 - In our siphash implementation, when building for coverity, use
5442 memcpy in place of a switch statement, so that coverity can tell
5443 we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
5444 on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
5445 - Fix several coverity warnings from our unit tests. Fixes bug
5446 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
5448 o Minor bugfixes (developer tooling):
5449 - Only log git script changes in the post-merge script when the
5450 merge was to the master branch. Fixes bug 31040; bugfix
5453 o Minor bugfixes (directory authorities):
5454 - Return a distinct status when formatting annotations fails. Fixes
5455 bug 30780; bugfix on 0.2.0.8-alpha.
5457 o Minor bugfixes (error handling):
5458 - On abort, try harder to flush the output buffers of log messages.
5459 On some platforms (macOS), log messages could be discarded when
5460 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5461 - Report the tor version whenever an assertion fails. Previously, we
5462 only reported the Tor version on some crashes, and some non-fatal
5463 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5464 - When tor aborts due to an error, close log file descriptors before
5465 aborting. Closing the logs makes some OSes flush log file buffers,
5466 rather than deleting buffered log lines. Fixes bug 31594; bugfix
5469 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
5470 - When extracting an IPv6 address from a PF-based proxy, verify that
5471 we are actually configured to receive an IPv6 address, and log an
5472 internal error if not. Fixes part of bug 31687; bugfix
5475 o Minor bugfixes (git hooks):
5476 - Remove a duplicate call to practracker from the pre-push hook. The
5477 pre-push hook already calls the pre-commit hook, which calls
5478 practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
5480 o Minor bugfixes (git scripts):
5481 - Stop hard-coding the bash path in the git scripts. Some OSes don't
5482 have bash in /usr/bin, others have an ancient bash at this path.
5483 Fixes bug 30840; bugfix on 0.4.0.1-alpha.
5484 - Stop hard-coding the tor master branch name and worktree path in
5485 the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
5486 - Allow git-push-all.sh to be run from any directory. Previously,
5487 the script only worked if run from an upstream worktree directory.
5488 Closes ticket 31678.
5490 o Minor bugfixes (guards):
5491 - When tor is missing descriptors for some primary entry guards,
5492 make the log message less alarming. It's normal for descriptors to
5493 expire, as long as tor fetches new ones soon after. Fixes bug
5494 31657; bugfix on 0.3.3.1-alpha.
5496 o Minor bugfixes (ipv6):
5497 - Check for private IPv6 addresses alongside their IPv4 equivalents
5498 when authorities check descriptors. Previously, we only checked
5499 for private IPv4 addresses. Fixes bug 31088; bugfix on
5500 0.2.3.21-rc. Patch by Neel Chauhan.
5501 - When parsing microdescriptors, we should check the IPv6 exit
5502 policy alongside IPv4. Previously, we checked both exit policies
5503 for only router info structures, while microdescriptors were
5504 IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
5507 o Minor bugfixes (logging):
5508 - Change log level of message "Hash of session info was not as
5509 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5511 - Fix a code issue that would have broken our parsing of log domains
5512 as soon as we had 33 of them. Fortunately, we still only have 29.
5513 Fixes bug 31451; bugfix on 0.4.1.4-rc.
5515 o Minor bugfixes (memory management):
5516 - Stop leaking a small amount of memory in nt_service_install(), in
5517 unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
5520 o Minor bugfixes (networking, IP addresses):
5521 - When parsing addresses via Tor's internal DNS lookup API, reject
5522 IPv4 addresses in square brackets, and accept IPv6 addresses in
5523 square brackets. This change completes the work started in 23082,
5524 making address parsing consistent between tor's internal DNS
5525 lookup and address parsing APIs. Fixes bug 30721; bugfix
5527 - When parsing addresses via Tor's internal address:port parsing and
5528 DNS lookup APIs, require IPv6 addresses with ports to have square
5529 brackets. But allow IPv6 addresses without ports, whether or not
5530 they have square brackets. Fixes bug 30721; bugfix
5533 o Minor bugfixes (onion service v3):
5534 - When purging the client descriptor cache, close any introduction
5535 point circuits associated with purged cache entries. This avoids
5536 picking those circuits later when connecting to the same
5537 introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
5539 o Minor bugfixes (onion services):
5540 - In the hs_ident_circuit_t data structure, remove the unused field
5541 circuit_type and the respective argument in hs_ident_circuit_new().
5542 This field was set by clients (for introduction) and services (for
5543 introduction and rendezvous) but was never used afterwards. Fixes
5544 bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
5546 o Minor bugfixes (operator tools):
5547 - Make tor-print-ed-signing-cert(1) print certificate expiration
5548 date in RFC 1123 and UNIX timestamp formats, to make output
5549 machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
5551 o Minor bugfixes (rust):
5552 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5553 31463; bugfix on 0.3.5.4-alpha.
5554 - Raise the minimum rustc version to 1.31.0, as checked by configure
5555 and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
5557 o Minor bugfixes (sendme, code structure):
5558 - Rename the trunnel SENDME file definition from sendme.trunnel to
5559 sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
5560 repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
5562 o Minor bugfixes (statistics):
5563 - Stop removing the ed25519 signature if the extra info file is too
5564 big. If the signature data was removed, but the keyword was kept,
5565 this could result in an unparseable extra info file. Fixes bug
5566 30958; bugfix on 0.2.7.2-alpha.
5568 o Minor bugfixes (subsystems):
5569 - Make the subsystem init order match the subsystem module
5570 dependencies. Call windows process security APIs as early as
5571 possible. Initialize logging before network and time, so that
5572 network and time can use logging. Fixes bug 31615; bugfix
5575 o Minor bugfixes (testing):
5576 - Teach the util/socketpair_ersatz test to work correctly when we
5577 have no network stack configured. Fixes bug 30804; bugfix
5580 o Minor bugfixes (v2 single onion services):
5581 - Always retry v2 single onion service intro and rend circuits with
5582 a 3-hop path. Previously, v2 single onion services used a 3-hop
5583 path when rendezvous circuits were retried after a remote or
5584 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5585 23818; bugfix on 0.2.9.3-alpha.
5587 o Minor bugfixes (v3 single onion services):
5588 - Always retry v3 single onion service intro and rend circuits with
5589 a 3-hop path. Previously, v3 single onion services used a 3-hop
5590 path when rend circuits were retried after a remote or delayed
5591 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
5592 bugfix on 0.3.2.1-alpha.
5593 - Make v3 single onion services fall back to a 3-hop intro, when all
5594 intro points are unreachable via a 1-hop path. Previously, v3
5595 single onion services failed when all intro nodes were unreachable
5596 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5599 - Improve documentation in circuit padding subsystem. Patch by
5600 Tobias Pulls. Closes ticket 31113.
5601 - Include an example usage for IPv6 ORPort in our sample torrc.
5602 Closes ticket 31320; patch from Ali Raheem.
5603 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5604 notice.html so that operators no longer have to host it
5605 themselves. Closes ticket 31089.
5608 - No longer include recommended package digests in votes as detailed
5609 in proposal 301. The RecommendedPackages torrc option is
5610 deprecated and will no longer have any effect. "package" lines
5611 will still be considered when computing consensuses for consensus
5612 methods that include them. (This change has no effect on the list
5613 of recommended Tor versions, which is still in use.) Closes
5615 - Remove torctl.in from contrib/dist directory. Resolves
5619 - Run shellcheck for all non-third-party shell scripts that are
5620 shipped with Tor. Closes ticket 29533.
5621 - When checking shell scripts, ignore any user-created directories.
5622 Closes ticket 30967.
5624 o Code simplification and refactoring (config handling):
5625 - Extract our variable manipulation code from confparse.c to a new
5626 lower-level typedvar.h module. Closes ticket 30864.
5627 - Lower another layer of object management from confparse.c to a
5628 more general tool. Now typed structure members are accessible via
5629 an abstract type. Implements ticket 30914.
5630 - Move our backend logic for working with configuration and state
5631 files into a lower-level library, since it no longer depends on
5632 any tor-specific functionality. Closes ticket 31626.
5633 - Numerous simplifications in configuration-handling logic: remove
5634 duplicated macro definitions, replace magical names with flags,
5635 and refactor "TestingTorNetwork" to use the same default-option
5636 logic as the rest of Tor. Closes ticket 30935.
5637 - Replace our ad-hoc set of flags for configuration variables and
5638 configuration variable types with fine-grained orthogonal flags
5639 corresponding to the actual behavior we want. Closes ticket 31625.
5641 o Code simplification and refactoring (misc):
5642 - Eliminate some uses of lower-level control reply abstractions,
5643 primarily in the onion_helper functions. Closes ticket 30889.
5644 - Rework bootstrap tracking to use the new publish-subscribe
5645 subsystem. Closes ticket 29976.
5646 - Rewrite format_node_description() and router_get_verbose_nickname()
5647 to use strlcpy() and strlcat(). The previous implementation used
5648 memcpy() and pointer arithmetic, which was error-prone. Closes
5649 ticket 31545. This is CID 1452819.
5650 - Split extrainfo_dump_to_string() into smaller functions. Closes
5652 - Use the ptrdiff_t type consistently for expressing variable
5653 offsets and pointer differences. Previously we incorrectly (but
5654 harmlessly) used int and sometimes off_t for these cases. Closes
5656 - Use the subsystems mechanism to manage the main event loop code.
5657 Closes ticket 30806.
5658 - Various simplifications and minor improvements to the circuit
5659 padding machines. Patch by Tobias Pulls. Closes tickets 31112
5662 o Documentation (hard-coded directories):
5663 - Improve the documentation for the DirAuthority and FallbackDir
5664 torrc options. Closes ticket 30955.
5666 o Documentation (tor.1 man page):
5667 - Fix typo in tor.1 man page: the option is "--help", not "-help".
5668 Fixes bug 31008; bugfix on 0.2.2.9-alpha.
5671 Changes in version 0.4.1.5 - 2019-08-20
5672 This is the first stable release in the 0.4.1.x series. This series
5673 adds experimental circuit-level padding, authenticated SENDME cells to
5674 defend against certain attacks, and several performance improvements
5675 to save on CPU consumption. It fixes bugs in bootstrapping and v3
5676 onion services. It also includes numerous smaller features and
5677 bugfixes on earlier versions.
5679 Per our support policy, we will support the 0.4.1.x series for nine
5680 months, or until three months after the release of a stable 0.4.2.x:
5681 whichever is longer. If you need longer-term support, please stick
5682 with 0.3.5.x, which will we plan to support until Feb 2022.
5684 Below are the changes since 0.4.1.4-rc. For a complete list of changes
5685 since 0.4.0.5, see the ReleaseNotes file.
5687 o Directory authority changes:
5688 - The directory authority "dizum" has a new IP address. Closes
5691 o Minor features (circuit padding logging):
5692 - Demote noisy client-side warn logs about circuit padding to
5693 protocol warnings. Add additional log messages and circuit ID
5694 fields to help with bug 30992 and any other future issues.
5696 o Minor bugfixes (circuit padding negotiation):
5697 - Bump the circuit padding protocol version to explicitly signify
5698 that the HS setup machine support is finalized in 0.4.1.x-stable.
5699 This also means that 0.4.1.x-alpha clients will not negotiate
5700 padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
5701 will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
5702 relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
5704 o Minor bugfixes (circuit padding):
5705 - Ignore non-padding cells on padding circuits. This addresses
5706 various warning messages from subsystems that were not expecting
5707 padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
5709 o Minor bugfixes (clock skew detection):
5710 - Don't believe clock skew results from NETINFO cells that appear to
5711 arrive before we sent the VERSIONS cells they are responding to.
5712 Previously, we would accept them up to 3 minutes "in the past".
5713 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5715 o Minor bugfixes (compatibility, standards compliance):
5716 - Fix a bug that would invoke undefined behavior on certain
5717 operating systems when trying to asprintf() a string exactly
5718 INT_MAX bytes long. We don't believe this is exploitable, but it's
5719 better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
5720 Found and fixed by Tobias Stoeckmann.
5722 o Minor bugfixes (compilation warning):
5723 - Fix a compilation warning on Windows about casting a function
5724 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5727 o Minor bugfixes (compilation):
5728 - Avoid using labs() on time_t, which can cause compilation warnings
5729 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5731 o Minor bugfixes (distribution):
5732 - Do not ship any temporary files found in the
5733 scripts/maint/practracker directory. Fixes bug 31311; bugfix
5736 o Testing (continuous integration):
5737 - In Travis, make stem log a controller trace to the console, and
5738 tail stem's tor log after failure. Closes ticket 30591.
5739 - In Travis, only run the stem tests that use a tor binary. Closes
5743 Changes in version 0.4.1.4-rc - 2019-07-25
5744 Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
5745 updates to a new list of fallback directories. If no new bugs are
5746 found, the next release in the 0.4.1.x serious should be stable.
5748 o Major bugfixes (circuit build, guard):
5749 - When considering upgrading circuits from "waiting for guard" to
5750 "open", always ignore circuits that are marked for close. Otherwise,
5751 we can end up in the situation where a subsystem is notified that
5752 a closing circuit has just opened, leading to undesirable
5753 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5755 o Minor features (continuous integration):
5756 - Our Travis configuration now uses Chutney to run some network
5757 integration tests automatically. Closes ticket 29280.
5759 o Minor features (fallback directory list):
5760 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5761 in December 2018 (of which ~122 were still functional), with a
5762 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5763 in June 2019. Closes ticket 28795.
5765 o Minor bugfixes (circuit padding):
5766 - On relays, properly check that a padding machine is absent before
5767 logging a warning about it being absent. Fixes bug 30649; bugfix
5769 - Add two NULL checks in unreachable places to silence Coverity (CID
5770 144729 and 1447291) and better future-proof ourselves. Fixes bug
5771 31024; bugfix on 0.4.1.1-alpha.
5773 o Minor bugfixes (crash on exit):
5774 - Avoid a set of possible code paths that could try to use freed
5775 memory in routerlist_free() while Tor was exiting. Fixes bug
5776 31003; bugfix on 0.1.2.2-alpha.
5778 o Minor bugfixes (logging):
5779 - Fix a conflict between the flag used for messaging-domain log
5780 messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
5783 o Minor bugfixes (memory leaks):
5784 - Fix a trivial memory leak when parsing an invalid value from a
5785 download schedule in the configuration. Fixes bug 30894; bugfix
5788 o Code simplification and refactoring:
5789 - Remove some dead code from circpad_machine_remove_token() to fix
5790 some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
5794 Changes in version 0.4.1.3-alpha - 2019-06-25
5795 Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
5796 alpha, most of them from earlier release series.
5798 o Major bugfixes (Onion service reachability):
5799 - Properly clean up the introduction point map when circuits change
5800 purpose from onion service circuits to pathbias, measurement, or
5801 other circuit types. This should fix some service-side instances
5802 of introduction point failure. Fixes bug 29034; bugfix
5805 o Minor features (geoip):
5806 - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
5807 Country database. Closes ticket 30852.
5809 o Minor features (logging):
5810 - Give a more useful assertion failure message if we think we have
5811 minherit() but we fail to make a region non-inheritable. Give a
5812 compile-time warning if our support for minherit() is incomplete.
5813 Closes ticket 30686.
5815 o Minor bugfixes (circuit isolation):
5816 - Fix a logic error that prevented the SessionGroup sub-option from
5817 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5819 o Minor bugfixes (continuous integration):
5820 - Allow the test-stem job to fail in Travis, because it sometimes
5821 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5822 - Skip test_rebind on macOS in Travis, because it is unreliable on
5823 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5824 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5825 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5827 o Minor bugfixes (directory authorities):
5828 - Stop crashing after parsing an unknown descriptor purpose
5829 annotation. We think this bug can only be triggered by modifying a
5830 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5832 o Minor bugfixes (pluggable transports):
5833 - When running as a bridge with pluggable transports, always publish
5834 pluggable transport information in our extrainfo descriptor, even
5835 if ExtraInfoStatistics is 0. This information is needed by
5836 BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
5839 - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
5840 Closes ticket 30630.
5843 Changes in version 0.4.1.2-alpha - 2019-06-06
5844 Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
5845 previous alpha, and some much older. It also contains minor testing
5846 improvements, and an improvement to the security of our authenticated
5847 SENDME implementation.
5849 o Major bugfixes (bridges):
5850 - Consider our directory information to have changed when our list
5851 of bridges changes. Previously, Tor would not re-compute the
5852 status of its directory information when bridges changed, and
5853 therefore would not realize that it was no longer able to build
5854 circuits. Fixes part of bug 29875.
5855 - Do not count previously configured working bridges towards our
5856 total of working bridges. Previously, when Tor's list of bridges
5857 changed, it would think that the old bridges were still usable,
5858 and delay fetching router descriptors for the new ones. Fixes part
5859 of bug 29875; bugfix on 0.3.0.1-alpha.
5861 o Major bugfixes (flow control, SENDME):
5862 - Decrement the stream-level package window after packaging a cell.
5863 Previously, it was done inside a log_debug() call, meaning that if
5864 debug logs were not enabled, the decrement would never happen, and
5865 thus the window would be out of sync with the other end point.
5866 Fixes bug 30628; bugfix on 0.4.1.1-alpha.
5868 o Major bugfixes (onion service reachability):
5869 - Properly clean up the introduction point map and associated state
5870 when circuits change purpose from onion service circuits to
5871 pathbias, measurement, or other circuit types. This may fix some
5872 instances of introduction point failure. Fixes bug 29034; bugfix
5875 o Minor features (authenticated SENDME):
5876 - Ensure that there is enough randomness on every circuit to prevent
5877 an attacker from successfully predicting the hashes they will need
5878 to include in authenticated SENDME cells. At a random interval, if
5879 we have not sent randomness already, we now leave some extra space
5880 at the end of a cell that we can fill with random bytes. Closes
5883 o Minor features (continuous integration):
5884 - When running coverage builds on Travis, we now set
5885 TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
5888 o Minor features (maintenance):
5889 - Add a new "make autostyle" target that developers can use to apply
5890 all automatic Tor style and consistency conversions to the
5891 codebase. Closes ticket 30539.
5893 o Minor features (testing):
5894 - The circuitpadding tests now use a reproducible RNG implementation,
5895 so that if a test fails, we can learn why. Part of ticket 28878.
5896 - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
5897 to set the RNG seed for tests that use a reproducible RNG. Part of
5899 - When running tests in coverage mode, take additional care to make
5900 our coverage deterministic, so that we can accurately track
5901 changes in code coverage. Closes ticket 30519.
5903 o Minor bugfixes (configuration, proxies):
5904 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5905 want authentication along with configured (but unused!)
5906 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5908 o Minor bugfixes (controller):
5909 - POSTDESCRIPTOR requests should work again. Previously, they were
5910 broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
5912 - Repair the HSFETCH command so that it works again. Previously, it
5913 expected a body when it shouldn't have. Fixes bug 30646; bugfix
5916 o Minor bugfixes (developer tooling):
5917 - Fix pre-push hook to allow fixup and squash commits when pushing
5918 to non-upstream git remote. Fixes bug 30286; bugfix
5921 o Minor bugfixes (directory authority):
5922 - Move the "bandwidth-file-headers" line in directory authority
5923 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5926 o Minor bugfixes (NetBSD):
5927 - Fix usage of minherit() on NetBSD and other platforms that define
5928 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
5929 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
5931 o Minor bugfixes (out-of-memory handler):
5932 - When purging the DNS cache because of an out-of-memory condition,
5933 try purging just the older entries at first. Previously, we would
5934 always purge the whole thing. Fixes bug 29617; bugfix
5937 o Minor bugfixes (portability):
5938 - Avoid crashing in our tor_vasprintf() implementation on systems
5939 that define neither vasprintf() nor _vscprintf(). (This bug has
5940 been here long enough that we question whether people are running
5941 Tor on such systems, but we're applying the fix out of caution.)
5942 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5945 o Minor bugfixes (shutdown, libevent, memory safety):
5946 - Avoid use-after-free bugs when shutting down, by making sure that
5947 we shut down libevent only after shutting down all of its users.
5948 We believe these are harmless in practice, since they only occur
5949 on the shutdown path, and do not involve any attacker-controlled
5950 data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
5952 o Minor bugfixes (static analysis):
5953 - Fix several spurious Coverity warnings about the unit tests, to
5954 lower our chances of missing real warnings in the future. Fixes
5955 bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
5958 - Specify torrc paths (with empty files) when launching tor in
5959 integration tests; refrain from reading user and system torrcs.
5960 Resolves issue 29702.
5963 Changes in version 0.4.1.1-alpha - 2019-05-22
5964 This is the first alpha in the 0.4.1.x series. It introduces
5965 lightweight circuit padding to make some onion-service circuits harder
5966 to distinguish, includes a new "authenticated SENDME" feature to make
5967 certain denial-of-service attacks more difficult, and improves
5968 performance in several areas.
5970 o Major features (circuit padding):
5971 - Onion service clients now add padding cells at the start of their
5972 INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
5973 look more like general purpose Exit traffic. The overhead for this
5974 is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
5975 extra upstream cell and 10 downstream cells for INTRODUCE
5976 circuits. This feature is only enabled when also supported by the
5977 circuit's middle node. (Clients may specify fixed middle nodes
5978 with the MiddleNodes option, and may force-disable this feature
5979 with the CircuitPadding option.) Closes ticket 28634.
5981 o Major features (code organization):
5982 - Tor now includes a generic publish-subscribe message-passing
5983 subsystem that we can use to organize intermodule dependencies. We
5984 hope to use this to reduce dependencies between modules that don't
5985 need to be related, and to generally simplify our codebase. Closes
5988 o Major features (controller protocol):
5989 - Controller commands are now parsed using a generalized parsing
5990 subsystem. Previously, each controller command was responsible for
5991 parsing its own input, which led to strange inconsistencies.
5992 Closes ticket 30091.
5994 o Major features (flow control):
5995 - Implement authenticated SENDMEs as detailed in proposal 289. A
5996 SENDME cell now includes the digest of the traffic that it
5997 acknowledges, so that once an end point receives the SENDME, it
5998 can confirm the other side's knowledge of the previous cells that
5999 were sent, and prevent certain types of denial-of-service attacks.
6000 This behavior is controlled by two new consensus parameters: see
6001 the proposal for more details. Fixes ticket 26288.
6003 o Major features (performance):
6004 - Our node selection algorithm now excludes nodes in linear time.
6005 Previously, the algorithm was quadratic, which could slow down
6006 heavily used onion services. Closes ticket 30307.
6008 o Major features (performance, RNG):
6009 - Tor now constructs a fast secure pseudorandom number generator for
6010 each thread, to use when performance is critical. This PRNG is
6011 based on AES-CTR, using a buffering construction similar to
6012 libottery and the (newer) OpenBSD arc4random() code. It
6013 outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
6014 small outputs. Although we believe it to be cryptographically
6015 strong, we are only using it when necessary for performance.
6016 Implements tickets 29023 and 29536.
6018 o Major bugfixes (onion service v3):
6019 - Fix an unreachable bug in which an introduction point could try to
6020 send an INTRODUCE_ACK with a status code that Trunnel would refuse
6021 to encode, leading the relay to assert(). We've consolidated the
6022 ABI values into Trunnel now. Fixes bug 30454; bugfix
6024 - Clients can now handle unknown status codes from INTRODUCE_ACK
6025 cells. (The NACK behavior will stay the same.) This will allow us
6026 to extend status codes in the future without breaking the normal
6027 client behavior. Fixes another part of bug 30454; bugfix
6030 o Minor features (circuit padding):
6031 - We now use a fast PRNG when scheduling circuit padding. Part of
6033 - Allow the padding machine designer to pick the edges of their
6034 histogram instead of trying to compute them automatically using an
6035 exponential formula. Resolves some undefined behavior in the case
6036 of small histograms and allows greater flexibility on machine
6037 design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
6038 - Allow circuit padding machines to hold a circuit open until they
6039 are done padding it. Closes ticket 28780.
6041 o Minor features (compile-time modules):
6042 - Add a "--list-modules" command to print a list of which compile-
6043 time modules are enabled. Closes ticket 30452.
6045 o Minor features (continuous integration):
6046 - Remove sudo configuration lines from .travis.yml as they are no
6047 longer needed with current Travis build environment. Resolves
6049 - In Travis, show stem's tor log after failure. Closes ticket 30234.
6051 o Minor features (controller):
6052 - Add onion service version 3 support to the HSFETCH command.
6053 Previously, only version 2 onion services were supported. Closes
6054 ticket 25417. Patch by Neel Chauhan.
6056 o Minor features (debugging):
6057 - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
6058 logging of additional information during assert failure. Now we
6059 can use format strings to include information for trouble
6060 shooting. Resolves ticket 29662.
6062 o Minor features (defense in depth):
6063 - In smartlist_remove_keeporder(), set unused pointers to NULL, in
6064 case a bug causes them to be used later. Closes ticket 30176.
6065 Patch from Tobias Stoeckmann.
6066 - Tor now uses a cryptographically strong PRNG even for decisions
6067 that we do not believe are security-sensitive. Previously, for
6068 performance reasons, we had used a trivially predictable linear
6069 congruential generator algorithm for certain load-balancing and
6070 statistical sampling decisions. Now we use our fast RNG in those
6071 cases. Closes ticket 29542.
6073 o Minor features (developer tools):
6074 - Tor's "practracker" test script now checks for files and functions
6075 that seem too long and complicated. Existing overlong functions
6076 and files are accepted for now, but should eventually be
6077 refactored. Closes ticket 29221.
6078 - Add some scripts used for git maintenance to scripts/git. Closes
6080 - Call practracker from pre-push and pre-commit git hooks to let
6081 developers know if they made any code style violations. Closes
6083 - Add a script to check that each header has a well-formed and
6084 unique guard macro. Closes ticket 29756.
6086 o Minor features (geoip):
6087 - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
6088 Country database. Closes ticket 30522.
6090 o Minor features (HTTP tunnel):
6091 - Return an informative web page when the HTTPTunnelPort is used as
6092 an HTTP proxy. Closes ticket 27821, patch by "eighthave".
6094 o Minor features (IPv6, v3 onion services):
6095 - Make v3 onion services put IPv6 addresses in service descriptors.
6096 Before this change, service descriptors only contained IPv4
6097 addresses. Implements 26992.
6099 o Minor features (modularity):
6100 - The "--disable-module-dirauth" compile-time option now disables
6101 even more dirauth-only code. Closes ticket 30345.
6103 o Minor features (performance):
6104 - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
6105 1.1.1 and later), since they tend to be faster than tiny-keccak.
6106 Closes ticket 28837.
6108 o Minor features (testing):
6109 - Tor's unit test code now contains helper functions to replace the
6110 PRNG with a deterministic or reproducible version for testing.
6111 Previously, various tests implemented this in various ways.
6112 Implements ticket 29732.
6113 - We now have a script, cov-test-determinism.sh, to identify places
6114 where our unit test coverage has become nondeterministic. Closes
6116 - Check that representative subsets of values of `int` and `unsigned
6117 int` can be represented by `void *`. Resolves issue 29537.
6119 o Minor bugfixes (bridge authority):
6120 - Bridge authorities now set bridges as running or non-running when
6121 about to dump their status to a file. Previously, they set bridges
6122 as running in response to a GETINFO command, but those shouldn't
6123 modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
6124 Patch by Neel Chauhan.
6126 o Minor bugfixes (channel padding statistics):
6127 - Channel padding write totals and padding-enabled totals are now
6128 counted properly in relay extrainfo descriptors. Fixes bug 29231;
6129 bugfix on 0.3.1.1-alpha.
6131 o Minor bugfixes (circuit padding):
6132 - Add a "CircuitPadding" torrc option to disable circuit padding.
6133 Fixes bug 28693; bugfix on 0.4.0.1-alpha.
6134 - Allow circuit padding machines to specify that they do not
6135 contribute much overhead, and provide consensus flags and torrc
6136 options to force clients to only use these low overhead machines.
6137 Fixes bug 29203; bugfix on 0.4.0.1-alpha.
6138 - Provide a consensus parameter to fully disable circuit padding, to
6139 be used in emergency network overload situations. Fixes bug 30173;
6140 bugfix on 0.4.0.1-alpha.
6141 - The circuit padding subsystem will no longer schedule padding if
6142 dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
6143 - Inspect a circuit-level cell queue before sending padding, to
6144 avoid sending padding while too much data is already queued. Fixes
6145 bug 29204; bugfix on 0.4.0.1-alpha.
6146 - Avoid calling monotime_absolute_usec() in circuit padding machines
6147 that do not use token removal or circuit RTT estimation. Fixes bug
6148 29085; bugfix on 0.4.0.1-alpha.
6150 o Minor bugfixes (compilation, unusual configurations):
6151 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
6152 due to missing declarations of abort(), and prevent other such
6153 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
6155 o Minor bugfixes (controller protocol):
6156 - Teach the controller parser to distinguish an object preceded by
6157 an argument list from one without. Previously, it couldn't
6158 distinguish an argument list from the first line of a multiline
6159 object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
6161 o Minor bugfixes (directory authority, ipv6):
6162 - Directory authorities with IPv6 support now always mark themselves
6163 as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
6164 Patch by Neel Chauhan.
6166 o Minor bugfixes (documentation):
6167 - Improve the documentation for using MapAddress with ".exit". Fixes
6168 bug 30109; bugfix on 0.1.0.1-rc.
6169 - Improve the monotonic time module and function documentation to
6170 explain what "monotonic" actually means, and document some results
6171 that have surprised people. Fixes bug 29640; bugfix
6173 - Use proper formatting when providing an example on quoting options
6174 that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
6176 o Minor bugfixes (logging):
6177 - Do not log a warning when running with an OpenSSL version other
6178 than the one Tor was compiled with, if the two versions should be
6179 compatible. Previously, we would warn whenever the version was
6180 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
6181 - Warn operators when the MyFamily option is set but ContactInfo is
6182 missing, as the latter should be set too. Fixes bug 25110; bugfix
6185 o Minor bugfixes (memory leak):
6186 - Avoid a minor memory leak that could occur on relays when failing
6187 to create a "keys" directory. Fixes bug 30148; bugfix
6190 o Minor bugfixes (onion services):
6191 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
6192 implemenation) when failing to load an onion service client
6193 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
6194 - When refusing to launch a controller's HSFETCH request because of
6195 rate-limiting, respond to the controller with a new response,
6196 "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
6197 this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
6199 - When relaunching a circuit to a rendezvous service, mark the
6200 circuit as needing high-uptime routers as appropriate. Fixes bug
6201 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
6202 - Stop ignoring IPv6 link specifiers sent to v3 onion services.
6203 (IPv6 support for v3 onion services is still incomplete: see
6204 ticket 23493 for details.) Fixes bug 23588; bugfix on
6205 0.3.2.1-alpha. Patch by Neel Chauhan.
6207 o Minor bugfixes (onion services, performance):
6208 - When building circuits to onion services, call tor_addr_parse()
6209 less often. Previously, we called tor_addr_parse() in
6210 circuit_is_acceptable() even if its output wasn't used. This
6211 change should improve performance when building circuits. Fixes
6212 bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
6214 o Minor bugfixes (performance):
6215 - When checking whether a node is a bridge, use a fast check to make
6216 sure that its identity is set. Previously, we used a constant-time
6217 check, which is not necessary in this case. Fixes bug 30308;
6218 bugfix on 0.3.5.1-alpha.
6220 o Minor bugfixes (pluggable transports):
6221 - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
6222 well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
6224 o Minor bugfixes (probability distributions):
6225 - Refactor and improve parts of the probability distribution code
6226 that made Coverity complain. Fixes bug 29805; bugfix
6229 o Minor bugfixes (python):
6230 - Stop assuming that /usr/bin/python3 exists. For scripts that work
6231 with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
6232 python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
6234 o Minor bugfixes (relay):
6235 - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
6236 is auto, act as if ExitRelay is 1. Previously, we would ignore
6237 IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
6238 0.3.5.1-alpha. Patch by Neel Chauhan.
6240 o Minor bugfixes (stats):
6241 - When ExtraInfoStatistics is 0, stop including bandwidth usage
6242 statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
6243 bridge statistics by country in extra-info documents. Fixes bug
6244 29018; bugfix on 0.2.4.1-alpha.
6246 o Minor bugfixes (testing):
6247 - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
6248 we used `ulimit -c` in test_bt.sh, which violates POSIX shell
6249 compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
6250 - Fix some incorrect code in the v3 onion service unit tests. Fixes
6251 bug 29243; bugfix on 0.3.2.1-alpha.
6252 - In the "routerkeys/*" tests, check the return values of mkdir()
6253 for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
6254 Found by Coverity as CID 1444254.
6255 - Split test_utils_general() into several smaller test functions.
6256 This makes it easier to perform resource deallocation on assert
6257 failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
6258 Fixes bug 29823; bugfix on 0.2.9.1-alpha.
6260 o Minor bugfixes (tor-resolve):
6261 - Fix a memory leak in tor-resolve that could happen if Tor gave it
6262 a malformed SOCKS response. (Memory leaks in tor-resolve don't
6263 actually matter, but it's good to fix them anyway.) Fixes bug
6264 30151; bugfix on 0.4.0.1-alpha.
6266 o Code simplification and refactoring:
6267 - Abstract out the low-level formatting of replies on the control
6268 port. Implements ticket 30007.
6269 - Add several assertions in an attempt to fix some Coverity
6270 warnings. Closes ticket 30149.
6271 - Introduce a connection_dir_buf_add() helper function that checks
6272 for compress_state of dir_connection_t and automatically writes a
6273 string to directory connection with or without compression.
6274 Resolves issue 28816.
6275 - Make the base32_decode() API return the number of bytes written,
6276 for consistency with base64_decode(). Closes ticket 28913.
6277 - Move most relay-only periodic events out of mainloop.c into the
6278 relay subsystem. Closes ticket 30414.
6279 - Refactor and encapsulate parts of the codebase that manipulate
6280 crypt_path_t objects. Resolves issue 30236.
6281 - Refactor several places in our code that Coverity incorrectly
6282 believed might have memory leaks. Closes ticket 30147.
6283 - Remove redundant return values in crypto_format, and the
6284 associated return value checks elsewhere in the code. Make the
6285 implementations in crypto_format consistent, and remove redundant
6286 code. Resolves ticket 29660.
6287 - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
6288 it is not a constant-time function. Closes ticket 30309.
6289 - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
6290 all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
6291 bugfix on 0.3.2.1-alpha.
6292 - Simplify v3 onion service link specifier handling code. Fixes bug
6293 23576; bugfix on 0.3.2.1-alpha.
6294 - Split crypto_digest.c into NSS code, OpenSSL code, and shared
6295 code. Resolves ticket 29108.
6296 - Split control.c into several submodules, in preparation for
6297 distributing its current responsibilities throughout the codebase.
6298 Closes ticket 29894.
6299 - Start to move responsibility for knowing about periodic events to
6300 the appropriate subsystems, so that the mainloop doesn't need to
6301 know all the periodic events in the rest of the codebase.
6302 Implements tickets 30293 and 30294.
6305 - Document how to find git commits and tags for bug fixes in
6306 CodingStandards.md. Update some file documentation. Closes
6310 - Remove the linux-tor-prio.sh script from contrib/operator-tools
6311 directory. Resolves issue 29434.
6312 - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
6313 - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
6316 o Code simplification and refactoring (shell scripts):
6317 - Clean up many of our shell scripts to fix shellcheck warnings.
6318 These include autogen.sh (ticket 26069), test_keygen.sh (ticket
6319 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
6320 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
6321 (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
6322 fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
6323 nagios-check-tor-authority-cert (ticket 29071),
6324 src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
6325 (ticket 29060), test_key_expiration.sh (ticket 30002),
6326 zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
6329 o Testing (chutney):
6330 - In "make test-network-all", test IPv6-only v3 single onion
6331 services, using the chutney network single-onion-v23-ipv6-md.
6332 Closes ticket 27251.
6335 Changes in version 0.4.0.5 - 2019-05-02
6336 This is the first stable release in the 0.4.0.x series. It contains
6337 improvements for power management and bootstrap reporting, as well as
6338 preliminary backend support for circuit padding to prevent some kinds
6339 of traffic analysis. It also continues our work in refactoring Tor for
6340 long-term maintainability.
6342 Per our support policy, we will support the 0.4.0.x series for nine
6343 months, or until three months after the release of a stable 0.4.1.x:
6344 whichever is longer. If you need longer-term support, please stick
6345 with 0.3.5.x, which will we plan to support until Feb 2022.
6347 Below are the changes since 0.4.0.4-rc. For a complete list of changes
6348 since 0.3.5.7, see the ReleaseNotes file.
6350 o Minor features (continuous integration):
6351 - In Travis, tell timelimit to use stem's backtrace signals, and
6352 launch python directly from timelimit, so python receives the
6353 signals from timelimit, rather than make. Closes ticket 30117.
6355 o Minor features (diagnostic):
6356 - Add more diagnostic log messages in an attempt to solve the issue
6357 of NUL bytes appearing in a microdescriptor cache. Related to
6360 o Minor features (testing):
6361 - Use the approx_time() function when setting the "Expires" header
6362 in directory replies, to make them more testable. Needed for
6365 o Minor bugfixes (rust):
6366 - Abort on panic in all build profiles, instead of potentially
6367 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
6369 o Minor bugfixes (shellcheck):
6370 - Look for scripts in their correct locations during "make
6371 shellcheck". Previously we had looked in the wrong place during
6372 out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
6374 o Minor bugfixes (testing):
6375 - Check the time in the "Expires" header using approx_time(). Fixes
6376 bug 30001; bugfix on 0.4.0.4-rc.
6378 o Minor bugfixes (UI):
6379 - Lower log level of unlink() errors during bootstrap. Fixes bug
6380 29930; bugfix on 0.4.0.1-alpha.
6383 Changes in version 0.4.0.4-rc - 2019-04-11
6384 Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
6385 several bugs from earlier versions, including some that had affected
6386 stability, and one that prevented relays from working with NSS.
6388 o Major bugfixes (NSS, relay):
6389 - When running with NSS, disable TLS 1.2 ciphersuites that use
6390 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
6391 these ciphersuites don't work -- which caused relays to fail to
6392 handshake with one another when these ciphersuites were enabled.
6393 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
6395 o Minor features (bandwidth authority):
6396 - Make bandwidth authorities ignore relays that are reported in the
6397 bandwidth file with the flag "vote=0". This change allows us to
6398 report unmeasured relays for diagnostic reasons without including
6399 their bandwidth in the bandwidth authorities' vote. Closes
6401 - When a directory authority is using a bandwidth file to obtain the
6402 bandwidth values that will be included in the next vote, serve
6403 this bandwidth file at /tor/status-vote/next/bandwidth. Closes
6406 o Minor features (circuit padding):
6407 - Stop warning about undefined behavior in the probability
6408 distribution tests. Float division by zero may technically be
6409 undefined behavior in C, but it's well defined in IEEE 754.
6410 Partial backport of 29298. Closes ticket 29527; bugfix
6413 o Minor features (continuous integration):
6414 - On Travis Rust builds, cleanup Rust registry and refrain from
6415 caching the "target/" directory to speed up builds. Resolves
6418 o Minor features (dormant mode):
6419 - Add a DormantCanceledByStartup option to tell Tor that it should
6420 treat a startup event as cancelling any previous dormant state.
6421 Integrators should use this option with caution: it should only be
6422 used if Tor is being started because of something that the user
6423 did, and not if Tor is being automatically started in the
6424 background. Closes ticket 29357.
6426 o Minor features (geoip):
6427 - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
6428 Country database. Closes ticket 29992.
6430 o Minor features (NSS, diagnostic):
6431 - Try to log an error from NSS (if there is any) and a more useful
6432 description of our situation if we are using NSS and a call to
6433 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
6435 o Minor bugfixes (security):
6436 - Fix a potential double free bug when reading huge bandwidth files.
6437 The issue is not exploitable in the current Tor network because
6438 the vulnerable code is only reached when directory authorities
6439 read bandwidth files, but bandwidth files come from a trusted
6440 source (usually the authorities themselves). Furthermore, the
6441 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
6442 which are not used by any of the current authorities. Fixes bug
6443 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
6445 - Verify in more places that we are not about to create a buffer
6446 with more than INT_MAX bytes, to avoid possible OOB access in the
6447 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
6448 fixed by Tobias Stoeckmann.
6450 o Minor bugfix (continuous integration):
6451 - Reset coverage state on disk after Travis CI has finished. This
6452 should prevent future coverage merge errors from causing the test
6453 suite for the "process" subsystem to fail. The process subsystem
6454 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
6456 - Terminate test-stem if it takes more than 9.5 minutes to run.
6457 (Travis terminates the job after 10 minutes of no output.)
6458 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
6460 o Minor bugfixes (bootstrap reporting):
6461 - During bootstrap reporting, correctly distinguish pluggable
6462 transports from plain proxies. Fixes bug 28925; bugfix
6465 o Minor bugfixes (C correctness):
6466 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
6467 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
6470 o Minor bugfixes (circuitpadding testing):
6471 - Minor tweaks to avoid rare test failures related to timers and
6472 monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
6474 o Minor bugfixes (directory authorities):
6475 - Actually include the bandwidth-file-digest line in directory
6476 authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
6478 o Minor bugfixes (logging):
6479 - On Windows, when errors cause us to reload a consensus from disk,
6480 tell the user that we are retrying at log level "notice".
6481 Previously we only logged this information at "info", which was
6482 confusing because the errors themselves were logged at "warning".
6483 Improves previous fix for 28614. Fixes bug 30004; bugfix
6486 o Minor bugfixes (pluggable transports):
6487 - Restore old behavior when it comes to discovering the path of a
6488 given Pluggable Transport executable file. A change in
6489 0.4.0.1-alpha had broken this behavior on paths containing a
6490 space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
6492 o Minor bugfixes (testing):
6493 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
6494 recent test-network.sh to use new chutney features in CI. Fixes
6495 bug 29703; bugfix on 0.2.9.1-alpha.
6496 - Fix a test failure on Windows caused by an unexpected "BUG"
6497 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
6500 o Minor bugfixes (TLS protocol):
6501 - When classifying a client's selection of TLS ciphers, if the
6502 client ciphers are not yet available, do not cache the result.
6503 Previously, we had cached the unavailability of the cipher list
6504 and never looked again, which in turn led us to assume that the
6505 client only supported the ancient V1 link protocol. This, in turn,
6506 was causing Stem integration tests to stall in some cases. Fixes
6507 bug 30021; bugfix on 0.2.4.8-alpha.
6509 o Code simplification and refactoring:
6510 - Introduce a connection_dir_buf_add() helper function that detects
6511 whether compression is in use, and adds a string accordingly.
6512 Resolves issue 28816.
6513 - Refactor handle_get_next_bandwidth() to use
6514 connection_dir_buf_add(). Implements ticket 29897.
6517 - Clarify that Tor performs stream isolation among *Port listeners
6518 by default. Resolves issue 29121.
6521 Changes in version 0.4.0.3-alpha - 2019-03-22
6522 Tor 0.4.0.3-alpha is the third in its series; it fixes several small
6523 bugs from earlier versions.
6525 o Minor features (address selection):
6526 - Treat the subnet 100.64.0.0/10 as public for some purposes;
6527 private for others. This subnet is the RFC 6598 (Carrier Grade
6528 NAT) IP range, and is deployed by many ISPs as an alternative to
6529 RFC 1918 that does not break existing internal networks. Tor now
6530 blocks SOCKS and control ports on these addresses and warns users
6531 if client ports or ExtORPorts are listening on a RFC 6598 address.
6532 Closes ticket 28525. Patch by Neel Chauhan.
6534 o Minor features (geoip):
6535 - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
6536 Country database. Closes ticket 29666.
6538 o Minor bugfixes (circuitpadding):
6539 - Inspect the circuit-level cell queue before sending padding, to
6540 avoid sending padding when too much data is queued. Fixes bug
6541 29204; bugfix on 0.4.0.1-alpha.
6543 o Minor bugfixes (logging):
6544 - Correct a misleading error message when IPv4Only or IPv6Only is
6545 used but the resolved address can not be interpreted as an address
6546 of the specified IP version. Fixes bug 13221; bugfix on
6547 0.2.3.9-alpha. Patch from Kris Katterjohn.
6548 - Log the correct port number for listening sockets when "auto" is
6549 used to let Tor pick the port number. Previously, port 0 was
6550 logged instead of the actual port number. Fixes bug 29144; bugfix
6551 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
6552 - Stop logging a BUG() warning when Tor is waiting for exit
6553 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
6555 o Minor bugfixes (memory management):
6556 - Refactor the shared random state's memory management so that it
6557 actually takes ownership of the shared random value pointers.
6558 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
6560 o Minor bugfixes (memory management, testing):
6561 - Stop leaking parts of the shared random state in the shared-random
6562 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
6564 o Minor bugfixes (pluggable transports):
6565 - Fix an assertion failure crash bug when a pluggable transport is
6566 terminated during the bootstrap phase. Fixes bug 29562; bugfix
6569 o Minor bugfixes (Rust, protover):
6570 - Add a missing "Padding" value to the Rust implementation of
6571 protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
6573 o Minor bugfixes (single onion services):
6574 - Allow connections to single onion services to remain idle without
6575 being disconnected. Previously, relays acting as rendezvous points
6576 for single onion services were mistakenly closing idle rendezvous
6577 circuits after 60 seconds, thinking that they were unused
6578 directory-fetching circuits that had served their purpose. Fixes
6579 bug 29665; bugfix on 0.2.1.26.
6581 o Minor bugfixes (stats):
6582 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
6583 relay and bridge extra-info documents. Fixes bug 29017; bugfix
6586 o Minor bugfixes (testing):
6587 - Downgrade some LOG_ERR messages in the address/* tests to
6588 warnings. The LOG_ERR messages were occurring when we had no
6589 configured network. We were failing the unit tests, because we
6590 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
6591 29530; bugfix on 0.3.5.8.
6592 - Fix our gcov wrapper script to look for object files at the
6593 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
6594 - Decrease the false positive rate of stochastic probability
6595 distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
6597 o Minor bugfixes (Windows, CI):
6598 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
6599 Windows Server 2012 R2 job. The remaining 2 jobs still provide
6600 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
6601 fast_finish, so failed jobs terminate the build immediately. Fixes
6602 bug 29601; bugfix on 0.3.5.4-alpha.
6605 Changes in version 0.3.5.8 - 2019-02-21
6606 Tor 0.3.5.8 backports several fixes from later releases, including fixes
6607 for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
6610 It also includes a fix for a medium-severity security bug affecting Tor
6611 0.3.2.1-alpha and later. All Tor instances running an affected release
6612 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
6614 o Major bugfixes (cell scheduler, KIST, security):
6615 - Make KIST consider the outbuf length when computing what it can
6616 put in the outbuf. Previously, KIST acted as though the outbuf
6617 were empty, which could lead to the outbuf becoming too full. It
6618 is possible that an attacker could exploit this bug to cause a Tor
6619 client or relay to run out of memory and crash. Fixes bug 29168;
6620 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
6621 TROVE-2019-001 and CVE-2019-8955.
6623 o Major bugfixes (networking, backport from 0.4.0.2-alpha):
6624 - Gracefully handle empty username/password fields in SOCKS5
6625 username/password auth message and allow SOCKS5 handshake to
6626 continue. Previously, we had rejected these handshakes, breaking
6627 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
6629 o Minor features (compilation, backport from 0.4.0.2-alpha):
6630 - Compile correctly when OpenSSL is built with engine support
6631 disabled, or with deprecated APIs disabled. Closes ticket 29026.
6632 Patches from "Mangix".
6634 o Minor features (geoip):
6635 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
6636 Country database. Closes ticket 29478.
6638 o Minor features (testing, backport from 0.4.0.2-alpha):
6639 - Treat all unexpected ERR and BUG messages as test failures. Closes
6642 o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
6643 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
6644 connection waiting for a descriptor that we actually have in the
6645 cache. It turns out that this can actually happen, though it is
6646 rare. Now, tor will recover and retry the descriptor. Fixes bug
6647 28669; bugfix on 0.3.2.4-alpha.
6649 o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
6650 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
6651 IPv6 socket was bound using an address family of AF_INET instead
6652 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
6655 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
6656 - Update Cargo.lock file to match the version made by the latest
6657 version of Rust, so that "make distcheck" will pass again. Fixes
6658 bug 29244; bugfix on 0.3.3.4-alpha.
6660 o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
6661 - Select guards even if the consensus has expired, as long as the
6662 consensus is still reasonably live. Fixes bug 24661; bugfix
6665 o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
6666 - Compile correctly on OpenBSD; previously, we were missing some
6667 headers required in order to detect it properly. Fixes bug 28938;
6668 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
6670 o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
6671 - Describe the contents of the v3 onion service client authorization
6672 files correctly: They hold public keys, not private keys. Fixes
6673 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
6675 o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
6676 - Rework rep_hist_log_link_protocol_counts() to iterate through all
6677 link protocol versions when logging incoming/outgoing connection
6678 counts. Tor no longer skips version 5, and we won't have to
6679 remember to update this function when new link protocol version is
6680 developed. Fixes bug 28920; bugfix on 0.2.6.10.
6682 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
6683 - Log more information at "warning" level when unable to read a
6684 private key; log more information at "info" level when unable to
6685 read a public key. We had warnings here before, but they were lost
6686 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
6688 o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
6689 - The amount of total available physical memory is now determined
6690 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
6691 when it is defined and a 64-bit variant is not available. Fixes
6692 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
6694 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
6695 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
6696 than one private key for a hidden service. Fixes bug 29040; bugfix
6698 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
6699 "debug" level. Tor used to log it as a warning, which caused very
6700 long log lines to appear for some users. Fixes bug 29135; bugfix
6702 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6703 as a warning. Instead, log it as a protocol warning, because there
6704 is nothing that relay operators can do to fix it. Fixes bug 29029;
6705 bugfix on 0.2.5.7-rc.
6707 o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
6708 - Mark outdated dirservers when Tor only has a reasonably live
6709 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
6711 o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
6712 - Detect and suppress "bug" warnings from the util/time test on
6713 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
6714 - Do not log an error-level message if we fail to find an IPv6
6715 network interface from the unit tests. Fixes bug 29160; bugfix
6718 o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
6719 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
6720 Some users took this phrasing to mean that the mentioned guard was
6721 under their control or responsibility, which it is not. Fixes bug
6722 28895; bugfix on Tor 0.3.0.1-alpha.
6725 Changes in version 0.3.4.11 - 2019-02-21
6726 Tor 0.3.4.11 is the third stable release in its series. It includes
6727 a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
6728 later. All Tor instances running an affected release should upgrade to
6729 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
6731 o Major bugfixes (cell scheduler, KIST, security):
6732 - Make KIST consider the outbuf length when computing what it can
6733 put in the outbuf. Previously, KIST acted as though the outbuf
6734 were empty, which could lead to the outbuf becoming too full. It
6735 is possible that an attacker could exploit this bug to cause a Tor
6736 client or relay to run out of memory and crash. Fixes bug 29168;
6737 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
6738 TROVE-2019-001 and CVE-2019-8955.
6740 o Minor features (geoip):
6741 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
6742 Country database. Closes ticket 29478.
6744 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
6745 - Update Cargo.lock file to match the version made by the latest
6746 version of Rust, so that "make distcheck" will pass again. Fixes
6747 bug 29244; bugfix on 0.3.3.4-alpha.
6749 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
6750 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6751 as a warning. Instead, log it as a protocol warning, because there
6752 is nothing that relay operators can do to fix it. Fixes bug 29029;
6753 bugfix on 0.2.5.7-rc.
6756 Changes in version 0.3.3.12 - 2019-02-21
6757 Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
6758 0.3.2.1-alpha and later. All Tor instances running an affected release
6759 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
6761 This release marks the end of support for the Tor 0.3.3.x series. We
6762 recommend that users switch to either the Tor 0.3.4 series (supported
6763 until at least 10 June 2019), or the Tor 0.3.5 series, which will
6764 receive long-term support until at least 1 Feb 2022.
6766 o Major bugfixes (cell scheduler, KIST, security):
6767 - Make KIST consider the outbuf length when computing what it can
6768 put in the outbuf. Previously, KIST acted as though the outbuf
6769 were empty, which could lead to the outbuf becoming too full. It
6770 is possible that an attacker could exploit this bug to cause a Tor
6771 client or relay to run out of memory and crash. Fixes bug 29168;
6772 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
6773 TROVE-2019-001 and CVE-2019-8955.
6775 o Minor features (geoip):
6776 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
6777 Country database. Closes ticket 29478.
6779 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
6780 - Update Cargo.lock file to match the version made by the latest
6781 version of Rust, so that "make distcheck" will pass again. Fixes
6782 bug 29244; bugfix on 0.3.3.4-alpha.
6784 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
6785 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6786 as a warning. Instead, log it as a protocol warning, because there
6787 is nothing that relay operators can do to fix it. Fixes bug 29029;
6788 bugfix on 0.2.5.7-rc.
6791 Changes in version 0.4.0.2-alpha - 2019-02-21
6792 Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
6793 bugs from earlier versions, including several that had broken
6794 backward compatibility.
6796 It also includes a fix for a medium-severity security bug affecting Tor
6797 0.3.2.1-alpha and later. All Tor instances running an affected release
6798 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
6800 o Major bugfixes (cell scheduler, KIST, security):
6801 - Make KIST consider the outbuf length when computing what it can
6802 put in the outbuf. Previously, KIST acted as though the outbuf
6803 were empty, which could lead to the outbuf becoming too full. It
6804 is possible that an attacker could exploit this bug to cause a Tor
6805 client or relay to run out of memory and crash. Fixes bug 29168;
6806 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
6807 TROVE-2019-001 and CVE-2019-8955.
6809 o Major bugfixes (networking):
6810 - Gracefully handle empty username/password fields in SOCKS5
6811 username/password auth messsage and allow SOCKS5 handshake to
6812 continue. Previously, we had rejected these handshakes, breaking
6813 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
6815 o Major bugfixes (windows, startup):
6816 - When reading a consensus file from disk, detect whether it was
6817 written in text mode, and re-read it in text mode if so. Always
6818 write consensus files in binary mode so that we can map them into
6819 memory later. Previously, we had written in text mode, which
6820 confused us when we tried to map the file on windows. Fixes bug
6821 28614; bugfix on 0.4.0.1-alpha.
6823 o Minor features (compilation):
6824 - Compile correctly when OpenSSL is built with engine support
6825 disabled, or with deprecated APIs disabled. Closes ticket 29026.
6826 Patches from "Mangix".
6828 o Minor features (developer tooling):
6829 - Check that bugfix versions in changes files look like Tor versions
6830 from the versions spec. Warn when bugfixes claim to be on a future
6831 release. Closes ticket 27761.
6832 - Provide a git pre-commit hook that disallows committing if we have
6833 any failures in our code and changelog formatting checks. It is
6834 now available in scripts/maint/pre-commit.git-hook. Implements
6837 o Minor features (directory authority):
6838 - When a directory authority is using a bandwidth file to obtain
6839 bandwidth values, include the digest of that file in the vote.
6840 Closes ticket 26698.
6842 o Minor features (geoip):
6843 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
6844 Country database. Closes ticket 29478.
6846 o Minor features (testing):
6847 - Treat all unexpected ERR and BUG messages as test failures. Closes
6850 o Minor bugfixes (build, compatibility, rust):
6851 - Update Cargo.lock file to match the version made by the latest
6852 version of Rust, so that "make distcheck" will pass again. Fixes
6853 bug 29244; bugfix on 0.3.3.4-alpha.
6855 o Minor bugfixes (compilation):
6856 - Fix compilation warnings in test_circuitpadding.c. Fixes bug
6857 29169; bugfix on 0.4.0.1-alpha.
6858 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
6859 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
6861 o Minor bugfixes (documentation):
6862 - Describe the contents of the v3 onion service client authorization
6863 files correctly: They hold public keys, not private keys. Fixes
6864 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
6866 o Minor bugfixes (linux seccomp sandbox):
6867 - Fix startup crash when experimental sandbox support is enabled.
6868 Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
6870 o Minor bugfixes (logging):
6871 - Avoid logging that we are relaxing a circuit timeout when that
6872 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
6873 - Log more information at "warning" level when unable to read a
6874 private key; log more information at "info" level when unable to
6875 read a public key. We had warnings here before, but they were lost
6876 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
6878 o Minor bugfixes (misc):
6879 - The amount of total available physical memory is now determined
6880 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
6881 when it is defined and a 64-bit variant is not available. Fixes
6882 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
6884 o Minor bugfixes (onion services):
6885 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
6886 than one private key for a hidden service. Fixes bug 29040; bugfix
6888 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
6889 "debug" level. Tor used to log it as a warning, which caused very
6890 long log lines to appear for some users. Fixes bug 29135; bugfix
6892 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6893 as a warning. Instead, log it as a protocol warning, because there
6894 is nothing that relay operators can do to fix it. Fixes bug 29029;
6895 bugfix on 0.2.5.7-rc.
6897 o Minor bugfixes (scheduler):
6898 - When re-adding channels to the pending list, check the correct
6899 channel's sched_heap_idx. This issue has had no effect in mainline
6900 Tor, but could have led to bugs down the road in improved versions
6901 of our circuit scheduling code. Fixes bug 29508; bugfix
6904 o Minor bugfixes (tests):
6905 - Fix intermittent failures on an adaptive padding test. Fixes one
6906 case of bug 29122; bugfix on 0.4.0.1-alpha.
6907 - Disable an unstable circuit-padding test that was failing
6908 intermittently because of an ill-defined small histogram. Such
6909 histograms will be allowed again after 29298 is implemented. Fixes
6910 a second case of bug 29122; bugfix on 0.4.0.1-alpha.
6911 - Detect and suppress "bug" warnings from the util/time test on
6912 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
6913 - Do not log an error-level message if we fail to find an IPv6
6914 network interface from the unit tests. Fixes bug 29160; bugfix
6918 - In the manpage entry describing MapAddress torrc setting, use
6919 example IP addresses from ranges specified for use in documentation
6920 by RFC 5737. Resolves issue 28623.
6923 - Remove the old check-tor script. Resolves issue 29072.
6926 Changes in version 0.4.0.1-alpha - 2019-01-18
6927 Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
6928 introduces improved features for power and bandwidth conservation,
6929 more accurate reporting of bootstrap progress for user interfaces, and
6930 an experimental backend for an exciting new adaptive padding feature.
6931 There is also the usual assortment of bugfixes and minor features, all
6934 o Major features (battery management, client, dormant mode):
6935 - When Tor is running as a client, and it is unused for a long time,
6936 it can now enter a "dormant" state. When Tor is dormant, it avoids
6937 network and CPU activity until it is reawoken either by a user
6938 request or by a controller command. For more information, see the
6939 configuration options starting with "Dormant". Implements tickets
6941 - The client's memory of whether it is "dormant", and how long it
6942 has spent idle, persists across invocations. Implements
6944 - There is a DormantOnFirstStartup option that integrators can use
6945 if they expect that in many cases, Tor will be installed but
6948 o Major features (bootstrap reporting):
6949 - When reporting bootstrap progress, report the first connection
6950 uniformly, regardless of whether it's a connection for building
6951 application circuits. This allows finer-grained reporting of early
6952 progress than previously possible, with the improvements of ticket
6953 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
6954 - When reporting bootstrap progress, treat connecting to a proxy or
6955 pluggable transport as separate from having successfully used that
6956 proxy or pluggable transport to connect to a relay. Closes tickets
6959 o Major features (circuit padding):
6960 - Implement preliminary support for the circuit padding portion of
6961 Proposal 254. The implementation supports Adaptive Padding (aka
6962 WTF-PAD) state machines for use between experimental clients and
6963 relays. Support is also provided for APE-style state machines that
6964 use probability distributions instead of histograms to specify
6965 inter-packet delay. At the moment, Tor does not provide any
6966 padding state machines that are used in normal operation: for now,
6967 this feature exists solely for experimentation. Closes
6970 o Major features (refactoring):
6971 - Tor now uses an explicit list of its own subsystems when
6972 initializing and shutting down. Previously, these systems were
6973 managed implicitly in various places throughout the codebase.
6974 (There may still be some subsystems using the old system.) Closes
6977 o Minor features (bootstrap reporting):
6978 - When reporting bootstrap progress, stop distinguishing between
6979 situations where only internal paths are available and situations
6980 where external paths are available. Previously, Tor would often
6981 erroneously report that it had only internal paths. Closes
6984 o Minor features (continuous integration):
6985 - Log Python version during each Travis CI job. Resolves
6988 o Minor features (controller):
6989 - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
6990 Implements ticket 28843.
6992 o Minor features (developer tooling):
6993 - Provide a git hook script to prevent "fixup!" and "squash!"
6994 commits from ending up in the master branch, as scripts/main/pre-
6995 push.git-hook. Closes ticket 27993.
6997 o Minor features (directory authority):
6998 - Directory authorities support a new consensus algorithm, under
6999 which the family lines in microdescriptors are encoded in a
7000 canonical form. This change makes family lines more compressible
7001 in transit, and on the client. Closes ticket 28266; implements
7004 o Minor features (directory authority, relay):
7005 - Authorities now vote on a "StaleDesc" flag to indicate that a
7006 relay's descriptor is so old that the relay should upload again
7007 soon. Relays treat this flag as a signal to upload a new
7008 descriptor. This flag will eventually let us remove the
7009 'published' date from routerstatus entries, and make our consensus
7010 diffs much smaller. Closes ticket 26770; implements proposal 293.
7012 o Minor features (fallback directory mirrors):
7013 - Update the fallback whitelist based on operator opt-ins and opt-
7014 outs. Closes ticket 24805, patch by Phoul.
7016 o Minor features (FreeBSD):
7017 - On FreeBSD-based systems, warn relay operators if the
7018 "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
7019 Closes ticket 28518.
7021 o Minor features (HTTP standards compliance):
7022 - Stop sending the header "Content-type: application/octet-stream"
7023 along with transparently compressed documents: this confused
7024 browsers. Closes ticket 28100.
7026 o Minor features (IPv6):
7027 - We add an option ClientAutoIPv6ORPort, to make clients randomly
7028 prefer a node's IPv4 or IPv6 ORPort. The random preference is set
7029 every time a node is loaded from a new consensus or bridge config.
7030 We expect that this option will enable clients to bootstrap more
7031 quickly without having to determine whether they support IPv4,
7032 IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
7033 - When using addrs_in_same_network_family(), avoid choosing circuit
7034 paths that pass through the same IPv6 subnet more than once.
7035 Previously, we only checked IPv4 subnets. Closes ticket 24393.
7036 Patch by Neel Chauhan.
7038 o Minor features (log messages):
7039 - Improve log message in v3 onion services that could print out
7040 negative revision counters. Closes ticket 27707. Patch
7043 o Minor features (memory usage):
7044 - Save memory by storing microdescriptor family lists with a more
7045 compact representation. Closes ticket 27359.
7046 - Tor clients now use mmap() to read consensus files from disk, so
7047 that they no longer need keep the full text of a consensus in
7048 memory when parsing it or applying a diff. Closes ticket 27244.
7050 o Minor features (parsing):
7051 - Directory authorities now validate that router descriptors and
7052 ExtraInfo documents are in a valid subset of UTF-8, and reject
7053 them if they are not. Closes ticket 27367.
7055 o Minor features (performance):
7056 - Cache the results of summarize_protocol_flags(), so that we don't
7057 have to parse the same protocol-versions string over and over.
7058 This should save us a huge number of malloc calls on startup, and
7059 may reduce memory fragmentation with some allocators. Closes
7061 - Remove a needless memset() call from get_token_arguments, thereby
7062 speeding up the tokenization of directory objects by about 20%.
7063 Closes ticket 28852.
7064 - Replace parse_short_policy() with a faster implementation, to
7065 improve microdescriptor parsing time. Closes ticket 28853.
7066 - Speed up directory parsing a little by avoiding use of the non-
7067 inlined strcmp_len() function. Closes ticket 28856.
7068 - Speed up microdescriptor parsing by about 30%, to help improve
7069 startup time. Closes ticket 28839.
7071 o Minor features (pluggable transports):
7072 - Add support for emitting STATUS updates to Tor's control port from
7073 a pluggable transport process. Closes ticket 28846.
7074 - Add support for logging to Tor's logging subsystem from a
7075 pluggable transport process. Closes ticket 28180.
7077 o Minor features (process management):
7078 - Add a new process API for handling child processes. This new API
7079 allows Tor to have bi-directional communication with child
7080 processes on both Unix and Windows. Closes ticket 28179.
7081 - Use the subsystem manager to initialize and shut down the process
7082 module. Closes ticket 28847.
7084 o Minor features (relay):
7085 - When listing relay families, list them in canonical form including
7086 the relay's own identity, and try to give a more useful set of
7087 warnings. Part of ticket 28266 and proposal 298.
7089 o Minor features (required protocols):
7090 - Before exiting because of a missing required protocol, Tor will
7091 now check the publication time of the consensus, and not exit
7092 unless the consensus is newer than the Tor program's own release
7093 date. Previously, Tor would not check the consensus publication
7094 time, and so might exit because of a missing protocol that might
7095 no longer be required in a current consensus. Implements proposal
7096 297; closes ticket 27735.
7098 o Minor features (testing):
7099 - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
7100 networks. Closes ticket 28840. Patch by Rob Jansen.
7102 o Minor bugfixes (client, clock skew):
7103 - Bootstrap successfully even when Tor's clock is behind the clocks
7104 on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
7105 - Select guards even if the consensus has expired, as long as the
7106 consensus is still reasonably live. Fixes bug 24661; bugfix
7109 o Minor bugfixes (compilation):
7110 - Compile correctly on OpenBSD; previously, we were missing some
7111 headers required in order to detect it properly. Fixes bug 28938;
7112 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7114 o Minor bugfixes (directory clients):
7115 - Mark outdated dirservers when Tor only has a reasonably live
7116 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
7118 o Minor bugfixes (directory mirrors):
7119 - Even when a directory mirror's clock is behind the clocks on the
7120 authorities, we now allow the mirror to serve "future"
7121 consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
7123 o Minor bugfixes (DNS):
7124 - Gracefully handle an empty or absent resolve.conf file by falling
7125 back to using "localhost" as a DNS server (and hoping it works).
7126 Previously, we would just stop running as an exit. Fixes bug
7127 21900; bugfix on 0.2.1.10-alpha.
7129 o Minor bugfixes (guards):
7130 - In count_acceptable_nodes(), the minimum number is now one bridge
7131 or guard node, and two non-guard nodes for a circuit. Previously,
7132 we had added up the sum of all nodes with a descriptor, but that
7133 could cause us to build failing circuits when we had either too
7134 many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
7135 0.2.3.1-alpha. Patch by Neel Chauhan.
7137 o Minor bugfixes (IPv6):
7138 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
7139 IPv6 socket was bound using an address family of AF_INET instead
7140 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
7143 o Minor bugfixes (logging):
7144 - Rework rep_hist_log_link_protocol_counts() to iterate through all
7145 link protocol versions when logging incoming/outgoing connection
7146 counts. Tor no longer skips version 5, and we won't have to
7147 remember to update this function when new link protocol version is
7148 developed. Fixes bug 28920; bugfix on 0.2.6.10.
7150 o Minor bugfixes (networking):
7151 - Introduce additional checks into tor_addr_parse() to reject
7152 certain incorrect inputs that previously were not detected. Fixes
7153 bug 23082; bugfix on 0.2.0.10-alpha.
7155 o Minor bugfixes (onion service v3, client):
7156 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
7157 connection waiting for a descriptor that we actually have in the
7158 cache. It turns out that this can actually happen, though it is
7159 rare. Now, tor will recover and retry the descriptor. Fixes bug
7160 28669; bugfix on 0.3.2.4-alpha.
7162 o Minor bugfixes (periodic events):
7163 - Refrain from calling routerlist_remove_old_routers() from
7164 check_descriptor_callback(). Instead, create a new hourly periodic
7165 event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
7167 o Minor bugfixes (pluggable transports):
7168 - Make sure that data is continously read from standard output and
7169 standard error pipes of a pluggable transport child-process, to
7170 avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
7171 bugfix on 0.2.3.6-alpha.
7173 o Minor bugfixes (unit tests):
7174 - Instead of relying on hs_free_all() to clean up all onion service
7175 objects in test_build_descriptors(), we now deallocate them one by
7176 one. This lets Coverity know that we are not leaking memory there
7177 and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
7179 o Minor bugfixes (usability):
7180 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
7181 Some users took this phrasing to mean that the mentioned guard was
7182 under their control or responsibility, which it is not. Fixes bug
7183 28895; bugfix on Tor 0.3.0.1-alpha.
7185 o Code simplification and refactoring:
7186 - Reimplement NETINFO cell parsing and generation to rely on
7187 trunnel-generated wire format handling code. Closes ticket 27325.
7188 - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
7190 - Rework SOCKS wire format handling to rely on trunnel-generated
7191 parsing/generation code. Resolves ticket 27620.
7192 - Split out bootstrap progress reporting from control.c into a
7193 separate file. Part of ticket 27402.
7194 - The .may_include files that we use to describe our directory-by-
7195 directory dependency structure now describe a noncircular
7196 dependency graph over the directories that they cover. Our
7197 checkIncludes.py tool now enforces this noncircularity. Closes
7201 - Mention that you cannot add a new onion service if Tor is already
7202 running with Sandbox enabled. Closes ticket 28560.
7203 - Improve ControlPort documentation. Mention that it accepts
7204 address:port pairs, and can be used multiple times. Closes
7206 - Document the exact output of "tor --version". Closes ticket 28889.
7209 - Stop responding to the 'GETINFO status/version/num-concurring' and
7210 'GETINFO status/version/num-versioning' control port commands, as
7211 those were deprecated back in 0.2.0.30. Also stop listing them in
7212 output of 'GETINFO info/names'. Resolves ticket 28757.
7213 - The scripts used to generate and maintain the list of fallback
7214 directories have been extracted into a new "fallback-scripts"
7215 repository. Closes ticket 27914.
7218 - Run shellcheck for scripts in the in scripts/ directory. Closes
7220 - Add unit tests for tokenize_string() and get_next_token()
7221 functions. Resolves ticket 27625.
7223 o Code simplification and refactoring (onion service v3):
7224 - Consolidate the authorized client descriptor cookie computation
7225 code from client and service into one function. Closes
7228 o Code simplification and refactoring (shell scripts):
7229 - Cleanup scan-build.sh to silence shellcheck warnings. Closes
7231 - Fix issues that shellcheck found in chutney-git-bisect.sh.
7232 Resolves ticket 28006.
7233 - Fix issues that shellcheck found in updateRustDependencies.sh.
7234 Resolves ticket 28012.
7235 - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
7236 - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
7237 - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
7238 - Fix shellcheck warnings in scripts/test/coverage. Resolves
7242 Changes in version 0.3.3.11 - 2019-01-07
7243 Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
7244 numerous fixes, including an important fix for anyone using OpenSSL
7245 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
7246 to this version, or to a later series.
7248 As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
7249 We anticipate that this will be the last release of Tor 0.3.3, unless
7250 some major bug is before then. Some time between now and then, users
7251 should switch to either the Tor 0.3.4 series (supported until at least
7252 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
7253 support until at least 1 Feb 2022.
7255 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
7256 - Fix our usage of named groups when running as a TLS 1.3 client in
7257 OpenSSL 1.1.1. Previously, we only initialized EC groups when
7258 running as a relay, which caused clients to fail to negotiate TLS
7259 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
7262 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
7263 - Fix a use-after-free error that could be caused by passing Tor an
7264 impossible set of options that would fail during options_act().
7265 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
7267 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
7268 - Only run one online rust build in Travis, to reduce network
7269 errors. Skip offline rust builds on Travis for Linux gcc, because
7270 they're redundant. Implements ticket 27252.
7271 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
7272 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
7273 Linux with default settings, because all the non-default builds
7274 use gcc on Linux. Implements ticket 27252.
7276 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
7277 - Use the Travis Homebrew addon to install packages on macOS during
7278 Travis CI. The package list is the same, but the Homebrew addon
7279 does not do a `brew update` by default. Implements ticket 27738.
7281 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
7282 - Replace the 150 fallbacks originally introduced in Tor
7283 0.3.3.1-alpha in January 2018 (of which ~115 were still
7284 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
7285 removed) generated in December 2018. Closes ticket 24803.
7287 o Minor features (geoip):
7288 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
7289 Country database. Closes ticket 29012.
7291 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
7292 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
7293 key export function from handling long labels. When this bug is
7294 detected, Tor will disable TLS 1.3. We recommend upgrading to a
7295 version of OpenSSL without this bug when it becomes available.
7296 Closes ticket 28973.
7298 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
7299 - Update relay descriptor on bandwidth changes only when the uptime
7300 is smaller than 24h, in order to reduce the efficiency of guard
7301 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
7303 o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
7304 - Avoid undefined behavior in an end-of-string check when parsing
7305 the BEGIN line in a directory object. Fixes bug 28202; bugfix
7308 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
7309 - Rewrite our assertion macros so that they no longer suppress the
7310 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
7312 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
7313 - Initialize a variable unconditionally in aes_new_cipher(), since
7314 some compilers cannot tell that we always initialize it before
7315 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
7317 o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
7318 - Log additional info when we get a relay that shares an ed25519 ID
7319 with a different relay, instead making a BUG() warning. Fixes bug
7320 27800; bugfix on 0.3.2.1-alpha.
7322 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
7323 - When a user requests a group-readable DataDirectory, give it to
7324 them. Previously, when the DataDirectory and the CacheDirectory
7325 were the same, the default setting (0) for
7326 CacheDirectoryGroupReadable would override the setting for
7327 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
7330 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
7331 - When the onion service directory can't be created or has the wrong
7332 permissions, do not log a stack trace. Fixes bug 27335; bugfix
7335 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
7336 - Close all SOCKS request (for the same .onion) if the newly fetched
7337 descriptor is unusable. Before that, we would close only the first
7338 one leaving the other hanging and let to time out by themselves.
7339 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
7341 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
7342 - Don't warn so loudly when Tor is unable to decode an onion
7343 descriptor. This can now happen as a normal use case if a client
7344 gets a descriptor with client authorization but the client is not
7345 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
7347 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
7348 - When deleting an ephemeral onion service (DEL_ONION), do not close
7349 any rendezvous circuits in order to let the existing client
7350 connections finish by themselves or closed by the application. The
7351 HS v2 is doing that already so now we have the same behavior for
7352 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
7354 o Minor bugfixes (HTTP tunnel):
7355 - Fix a bug warning when closing an HTTP tunnel connection due to
7356 an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
7359 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
7360 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
7361 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
7363 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
7364 - Ensure circuitmux queues are empty before scheduling or sending
7365 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
7367 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
7368 - Reject protocol names containing bytes other than alphanumeric
7369 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
7372 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
7373 - Compute protover votes correctly in the rust version of the
7374 protover code. Previously, the protover rewrite in 24031 allowed
7375 repeated votes from the same voter for the same protocol version
7376 to be counted multiple times in protover_compute_vote(). Fixes bug
7377 27649; bugfix on 0.3.3.5-rc.
7378 - Reject protover names that contain invalid characters. Fixes bug
7379 27687; bugfix on 0.3.3.1-alpha.
7381 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
7382 - protover_all_supported() would attempt to allocate up to 16GB on
7383 some inputs, leading to a potential memory DoS. Fixes bug 27206;
7384 bugfix on 0.3.3.5-rc.
7386 o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
7387 - Fix a potential null dereference in protover_all_supported(). Add
7388 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
7389 - Return a string that can be safely freed by C code, not one
7390 created by the rust allocator, in protover_all_supported(). Fixes
7391 bug 27740; bugfix on 0.3.3.1-alpha.
7392 - Fix an API mismatch in the rust implementation of
7393 protover_compute_vote(). This bug could have caused crashes on any
7394 directory authorities running Tor with Rust (which we do not yet
7395 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
7397 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
7398 - If a unit test running in a subprocess exits abnormally or with a
7399 nonzero status code, treat the test as having failed, even if the
7400 test reported success. Without this fix, memory leaks don't cause
7401 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
7402 bugfix on 0.2.2.4-alpha.
7404 o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
7405 - Treat backtrace test failures as expected on BSD-derived systems
7406 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
7407 (FreeBSD failures have been treated as expected since 18204 in
7408 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
7410 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
7411 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
7412 bugfix on 0.3.0.1-alpha.
7415 Changes in version 0.3.4.10 - 2019-01-07
7416 Tor 0.3.4.9 is the second stable release in its series; it backports
7417 numerous fixes, including an important fix for relays, and for anyone
7418 using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
7421 As a reminder, the Tor 0.3.4 series will be supported until 10 June
7422 2019. Some time between now and then, users should switch to the Tor
7423 0.3.5 series, which will receive long-term support until at least 1
7426 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
7427 - Fix our usage of named groups when running as a TLS 1.3 client in
7428 OpenSSL 1.1.1. Previously, we only initialized EC groups when
7429 running as a relay, which caused clients to fail to negotiate TLS
7430 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
7433 o Major bugfixes (relay, directory, backport from 0.3.5.7):
7434 - Always reactivate linked connections in the main loop so long as
7435 any linked connection has been active. Previously, connections
7436 serving directory information wouldn't get reactivated after the
7437 first chunk of data was sent (usually 32KB), which would prevent
7438 clients from bootstrapping. Fixes bug 28912; bugfix on
7439 0.3.4.1-alpha. Patch by "cypherpunks3".
7441 o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
7442 - Always show the configure and test logs, and upload them as build
7443 artifacts, when building for Windows using Appveyor CI.
7446 o Minor features (controller, backport from 0.3.5.1-alpha):
7447 - For purposes of CIRC_BW-based dropped cell detection, track half-
7448 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
7449 bias check cells to arrive without counting it as dropped until
7450 either the END arrives, or the windows are empty. Closes
7453 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
7454 - Replace the 150 fallbacks originally introduced in Tor
7455 0.3.3.1-alpha in January 2018 (of which ~115 were still
7456 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
7457 removed) generated in December 2018. Closes ticket 24803.
7459 o Minor features (geoip):
7460 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
7461 Country database. Closes ticket 28395.
7463 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
7464 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
7465 key export function from handling long labels. When this bug is
7466 detected, Tor will disable TLS 1.3. We recommend upgrading to a
7467 version of OpenSSL without this bug when it becomes available.
7468 Closes ticket 28973.
7470 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
7471 - Initialize a variable unconditionally in aes_new_cipher(), since
7472 some compilers cannot tell that we always initialize it before
7473 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
7475 o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
7476 - Avoid a logging a BUG() stacktrace when closing connection held
7477 open because the write side is rate limited but not the read side.
7478 Now, the connection read side is simply shut down until Tor is
7479 able to flush the connection and close it. Fixes bug 27750; bugfix
7482 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
7483 - Manually configure the zstd compiler options, when building using
7484 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
7485 not come with a pkg-config file. Fixes bug 28454; bugfix
7487 - Stop using an external OpenSSL install, and stop installing MSYS2
7488 packages, when building using mingw on Appveyor Windows CI. Fixes
7489 bug 28399; bugfix on 0.3.4.1-alpha.
7491 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
7492 - Explicitly specify the path to the OpenSSL library and do not
7493 download OpenSSL from Pacman, but instead use the library that is
7494 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
7496 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
7497 - When a user requests a group-readable DataDirectory, give it to
7498 them. Previously, when the DataDirectory and the CacheDirectory
7499 were the same, the default setting (0) for
7500 CacheDirectoryGroupReadable would override the setting for
7501 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
7504 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
7505 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
7506 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
7508 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
7509 - Don't warn so loudly when Tor is unable to decode an onion
7510 descriptor. This can now happen as a normal use case if a client
7511 gets a descriptor with client authorization but the client is not
7512 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
7514 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
7515 - When deleting an ephemeral onion service (DEL_ONION), do not close
7516 any rendezvous circuits in order to let the existing client
7517 connections finish by themselves or closed by the application. The
7518 HS v2 is doing that already so now we have the same behavior for
7519 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
7521 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
7522 - Update relay descriptor on bandwidth changes only when the uptime
7523 is smaller than 24h, in order to reduce the efficiency of guard
7524 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
7526 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
7527 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
7528 bugfix on 0.3.0.1-alpha.
7531 Changes in version 0.3.5.7 - 2019-01-07
7532 Tor 0.3.5.7 is the first stable release in its series; it includes
7533 compilation and portability fixes, and a fix for a severe problem
7534 affecting directory caches.
7536 The Tor 0.3.5 series includes several new features and performance
7537 improvements, including client authorization for v3 onion services,
7538 cleanups to bootstrap reporting, support for improved bandwidth-
7539 measurement tools, experimental support for NSS in place of OpenSSL,
7540 and much more. It also begins a full reorganization of Tor's code
7541 layout, for improved modularity and maintainability in the future.
7542 Finally, there is the usual set of performance improvements and
7543 bugfixes that we try to do in every release series.
7545 There are a couple of changes in the 0.3.5 that may affect
7546 compatibility. First, the default version for newly created onion
7547 services is now v3. Use the HiddenServiceVersion option if you want to
7548 override this. Second, some log messages related to bootstrapping have
7549 changed; if you use stem, you may need to update to the latest version
7550 so it will recognize them.
7552 We have designated 0.3.5 as a "long-term support" (LTS) series: we
7553 will continue to patch major bugs in typical configurations of 0.3.5
7554 until at least 1 Feb 2022. (We do not plan to provide long-term
7555 support for embedding, Rust support, NSS support, running a directory
7556 authority, or unsupported platforms. For these, you will need to stick
7557 with the latest stable release.)
7559 Below are the changes since 0.3.5.6-rc. For a complete list of changes
7560 since 0.3.4.9, see the ReleaseNotes file.
7562 o Major bugfixes (relay, directory):
7563 - Always reactivate linked connections in the main loop so long as
7564 any linked connection has been active. Previously, connections
7565 serving directory information wouldn't get reactivated after the
7566 first chunk of data was sent (usually 32KB), which would prevent
7567 clients from bootstrapping. Fixes bug 28912; bugfix on
7568 0.3.4.1-alpha. Patch by "cypherpunks3".
7570 o Minor features (compilation):
7571 - When possible, place our warning flags in a separate file, to
7572 avoid flooding verbose build logs. Closes ticket 28924.
7574 o Minor features (geoip):
7575 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
7576 Country database. Closes ticket 29012.
7578 o Minor features (OpenSSL bug workaround):
7579 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
7580 key export function from handling long labels. When this bug is
7581 detected, Tor will disable TLS 1.3. We recommend upgrading to a
7582 version of OpenSSL without this bug when it becomes available.
7583 Closes ticket 28973.
7585 o Minor features (performance):
7586 - Remove about 96% of the work from the function that we run at
7587 startup to test our curve25519_basepoint implementation. Since
7588 this function has yet to find an actual failure, we now only run
7589 it for 8 iterations instead of 200. Based on our profile
7590 information, this change should save around 8% of our startup time
7591 on typical desktops, and may have a similar effect on other
7592 platforms. Closes ticket 28838.
7593 - Stop re-validating our hardcoded Diffie-Hellman parameters on
7594 every startup. Doing this wasted time and cycles, especially on
7595 low-powered devices. Closes ticket 28851.
7597 o Minor bugfixes (compilation):
7598 - Fix compilation for Android by adding a missing header to
7599 freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
7601 o Minor bugfixes (correctness):
7602 - Fix an unreached code path where we checked the value of
7603 "hostname" inside send_resolved_hostname_cell(). Previously, we
7604 used it before checking it; now we check it first. Fixes bug
7605 28879; bugfix on 0.1.2.7-alpha.
7607 o Minor bugfixes (testing):
7608 - Make sure that test_rebind.py actually obeys its timeout, even
7609 when it receives a large number of log messages. Fixes bug 28883;
7610 bugfix on 0.3.5.4-alpha.
7611 - Stop running stem's unit tests as part of "make test-stem", but
7612 continue to run stem's unit and online tests during "make test-
7613 stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
7615 o Minor bugfixes (windows services):
7616 - Make Tor start correctly as an NT service again: previously it was
7617 broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
7619 o Code simplification and refactoring:
7620 - When parsing a port configuration, make it more obvious to static
7621 analyzer tools that we always initialize the address. Closes
7625 Changes in version 0.3.5.6-rc - 2018-12-18
7626 Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
7627 It is the first release candidate in the 0.3.5.x series; if no further
7628 huge bugs are found, our next release may be the stable 0.3.5.x.
7630 o Minor features (continuous integration, Windows):
7631 - Always show the configure and test logs, and upload them as build
7632 artifacts, when building for Windows using Appveyor CI.
7635 o Minor features (fallback directory list):
7636 - Replace the 150 fallbacks originally introduced in Tor
7637 0.3.3.1-alpha in January 2018 (of which ~115 were still
7638 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
7639 removed) generated in December 2018. Closes ticket 24803.
7641 o Minor features (geoip):
7642 - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
7643 Country database. Closes ticket 28744.
7645 o Minor bugfixes (compilation):
7646 - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
7647 cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
7649 o Minor bugfixes (continuous integration, Windows):
7650 - Explicitly specify the path to the OpenSSL library and do not
7651 download OpenSSL from Pacman, but instead use the library that is
7652 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
7654 o Minor bugfixes (onion service v3):
7655 - When deleting an ephemeral onion service (DEL_ONION), do not close
7656 any rendezvous circuits in order to let the existing client
7657 connections finish by themselves or closed by the application. The
7658 HS v2 is doing that already so now we have the same behavior for
7659 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
7661 o Minor bugfixes (restart-in-process, boostrap):
7662 - Add missing resets of bootstrap tracking state when shutting down
7663 (regression caused by ticket 27169). Fixes bug 28524; bugfix
7666 o Minor bugfixes (testing):
7667 - Use a separate DataDirectory for the test_rebind script.
7668 Previously, this script would run using the default DataDirectory,
7669 and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
7670 Patch from Taylor R Campbell.
7671 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
7672 bugfix on 0.3.0.1-alpha.
7674 o Minor bugfixes (Windows):
7675 - Correctly identify Windows 8.1, Windows 10, and Windows Server
7676 2008 and later from their NT versions. Fixes bug 28096; bugfix on
7677 0.2.2.34; reported by Keifer Bly.
7678 - On recent Windows versions, the GetVersionEx() function may report
7679 an earlier Windows version than the running OS. To avoid user
7680 confusion, add "[or later]" to Tor's version string on affected
7681 versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
7683 - Remove Windows versions that were never supported by the
7684 GetVersionEx() function. Stop duplicating the latest Windows
7685 version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
7686 reported by Keifer Bly.
7689 - Increase logging and tag all log entries with timestamps in
7690 test_rebind.py. Provides diagnostics for issue 28229.
7692 o Code simplification and refactoring (shared random, dirauth):
7693 - Change many tor_assert() to use BUG() instead. The idea is to not
7694 crash a dirauth but rather scream loudly with a stacktrace and let
7695 it continue run. The shared random subsystem is very resilient and
7696 if anything wrong happens with it, at worst a non coherent value
7697 will be put in the vote and discarded by the other authorities.
7698 Closes ticket 19566.
7700 o Documentation (onion services):
7701 - Document in the man page that changing ClientOnionAuthDir value or
7702 adding a new file in the directory will not work at runtime upon
7703 sending a HUP if Sandbox 1. Closes ticket 28128.
7704 - Note in the man page that the only real way to fully revoke an
7705 onion service v3 client authorization is by restarting the tor
7706 process. Closes ticket 28275.
7709 Changes in version 0.3.5.5-alpha - 2018-11-16
7710 Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
7711 including several that we hope to backport to older release series in
7714 o Major bugfixes (OpenSSL, portability):
7715 - Fix our usage of named groups when running as a TLS 1.3 client in
7716 OpenSSL 1.1.1. Previously, we only initialized EC groups when
7717 running as a relay, which caused clients to fail to negotiate TLS
7718 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
7721 o Minor features (geoip):
7722 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
7723 Country database. Closes ticket 28395.
7725 o Minor bugfixes (compilation):
7726 - Initialize a variable unconditionally in aes_new_cipher(), since
7727 some compilers cannot tell that we always initialize it before
7728 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
7730 o Minor bugfixes (connection, relay):
7731 - Avoid a logging a BUG() stacktrace when closing connection held
7732 open because the write side is rate limited but not the read side.
7733 Now, the connection read side is simply shut down until Tor is
7734 able to flush the connection and close it. Fixes bug 27750; bugfix
7737 o Minor bugfixes (continuous integration, Windows):
7738 - Manually configure the zstd compiler options, when building using
7739 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
7740 not come with a pkg-config file. Fixes bug 28454; bugfix
7742 - Stop using an external OpenSSL install, and stop installing MSYS2
7743 packages, when building using mingw on Appveyor Windows CI. Fixes
7744 bug 28399; bugfix on 0.3.4.1-alpha.
7746 o Minor bugfixes (documentation):
7747 - Make Doxygen work again after the code movement in the 0.3.5
7748 source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
7750 o Minor bugfixes (Linux seccomp2 sandbox):
7751 - Permit the "shutdown()" system call, which is apparently used by
7752 OpenSSL under some circumstances. Fixes bug 28183; bugfix
7755 o Minor bugfixes (logging):
7756 - Stop talking about the Named flag in log messages. Clients have
7757 ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
7760 o Minor bugfixes (memory leaks):
7761 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
7762 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
7764 o Minor bugfixes (onion services):
7765 - On an intro point for a version 3 onion service, stop closing
7766 introduction circuits on an NACK. This lets the client decide
7767 whether to reuse the circuit or discard it. Previously, we closed
7768 intro circuits when sending NACKs. Fixes bug 27841; bugfix on
7769 0.3.2.1-alpha. Patch by Neel Chaunan.
7770 - When replacing a descriptor in the client cache, make sure to
7771 close all client introduction circuits for the old descriptor, so
7772 we don't end up with unusable leftover circuits. Fixes bug 27471;
7773 bugfix on 0.3.2.1-alpha.
7776 Changes in version 0.3.5.4-alpha - 2018-11-08
7777 Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
7778 improves our continuous integration support. It continues our attempts
7779 to stabilize this alpha branch and build it into a foundation for an
7780 acceptable long-term-support release.
7782 o Major bugfixes (compilation, rust):
7783 - Rust tests can now build and run successfully with the
7784 --enable-fragile-hardening option enabled. Doing this currently
7785 requires the rust beta channel; it will be possible with stable
7786 rust once Rust version 1.31 is released. Patch from Alex Crichton.
7787 Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
7789 o Major bugfixes (embedding, main loop):
7790 - When DisableNetwork becomes set, actually disable periodic events
7791 that are already enabled. (Previously, we would refrain from
7792 enabling new ones, but we would leave the old ones turned on.)
7793 Fixes bug 28348; bugfix on 0.3.4.1-alpha.
7795 o Minor features (continuous integration):
7796 - Add a Travis CI build for --enable-nss on Linux gcc. Closes
7798 - Add new CI job to Travis configuration to run stem-based
7799 integration tests. Closes ticket 27913.
7801 o Minor features (Windows, continuous integration):
7802 - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
7803 Appveyor's CI. Closes ticket 28318.
7805 o Minor bugfixes (C correctness, also in 0.3.4.9):
7806 - Avoid undefined behavior in an end-of-string check when parsing
7807 the BEGIN line in a directory object. Fixes bug 28202; bugfix
7810 o Minor bugfixes (compilation):
7811 - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
7812 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7814 o Minor bugfixes (compilation, OpenSolaris):
7815 - Fix compilation on OpenSolaris and its descendants by adding a
7816 missing include to compat_pthreads.c. Fixes bug 27963; bugfix
7819 o Minor bugfixes (configuration):
7820 - Refuse to start with relative file paths and RunAsDaemon set
7821 (regression from the fix for bug 22731). Fixes bug 28298; bugfix
7824 o Minor bugfixes (directory authority, also in 0.3.4.9):
7825 - Log additional info when we get a relay that shares an ed25519 ID
7826 with a different relay, instead of a BUG() warning with a
7827 backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
7829 o Minor bugfixes (onion service v3):
7830 - Build the service descriptor's signing key certificate before
7831 uploading, so we always have a fresh one: leaving no chances for
7832 it to expire service side. Fixes bug 27838; bugfix
7835 o Minor bugfixes (onion service v3, client authorization):
7836 - Fix an assert() when adding a client authorization for the first
7837 time and then sending a HUP signal to the service. Before that,
7838 Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
7840 o Minor bugfixes (onion services):
7841 - Unless we have explicitly set HiddenServiceVersion, detect the
7842 onion service version and then look for invalid options.
7843 Previously, we did the reverse, but that broke existing configs
7844 which were pointed to a v2 service and had options like
7845 HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
7846 0.3.5.1-alpha. Patch by Neel Chauhan.
7848 o Minor bugfixes (portability):
7849 - Make the OPE code (which is used for v3 onion services) run
7850 correctly on big-endian platforms. Fixes bug 28115; bugfix
7853 o Minor bugfixes (protover, rust):
7854 - Reject extra commas in version strings. Fixes bug 27197; bugfix
7857 o Minor bugfixes (relay shutdown, systemd):
7858 - Notify systemd of ShutdownWaitLength so it can be set to longer
7859 than systemd's TimeoutStopSec. In Tor's systemd service file, set
7860 TimeoutSec to 60 seconds to allow Tor some time to shut down.
7861 Fixes bug 28113; bugfix on 0.2.6.2-alpha.
7863 o Minor bugfixes (rust, also in 0.3.4.9):
7864 - Fix a potential null dereference in protover_all_supported(). Add
7865 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
7866 - Return a string that can be safely freed by C code, not one
7867 created by the rust allocator, in protover_all_supported(). Fixes
7868 bug 27740; bugfix on 0.3.3.1-alpha.
7870 o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
7871 - Fix an API mismatch in the rust implementation of
7872 protover_compute_vote(). This bug could have caused crashes on any
7873 directory authorities running Tor with Rust (which we do not yet
7874 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
7876 o Minor bugfixes (testing):
7877 - Avoid hangs and race conditions in test_rebind.py. Fixes bug
7878 27968; bugfix on 0.3.5.1-alpha.
7880 o Minor bugfixes (testing, also in 0.3.4.9):
7881 - Treat backtrace test failures as expected on BSD-derived systems
7882 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
7883 (FreeBSD failures have been treated as expected since 18204 in
7884 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
7886 o Documentation (onion service manpage):
7887 - Improve HSv3 client authorization by making some options more
7888 explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
7891 Changes in version 0.3.4.9 - 2018-11-02
7892 Tor 0.3.4.9 is the second stable release in its series; it backports
7893 numerous fixes, including a fix for a bandwidth management bug that
7894 was causing memory exhaustion on relays. Anyone running an earlier
7895 version of Tor 0.3.4.9 should upgrade.
7897 o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
7898 - Fix compilation on ARM (and other less-used CPUs) when compiling
7899 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
7901 o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
7902 - Make sure Tor bootstraps and works properly if only the
7903 ControlPort is set. Prior to this fix, Tor would only bootstrap
7904 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
7905 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
7907 o Major bugfixes (relay, backport from 0.3.5.3-alpha):
7908 - When our write bandwidth limit is exhausted, stop writing on the
7909 connection. Previously, we had a typo in the code that would make
7910 us stop reading instead, leading to relay connections being stuck
7911 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
7914 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
7915 - Fix a use-after-free error that could be caused by passing Tor an
7916 impossible set of options that would fail during options_act().
7917 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
7919 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
7920 - Don't do a distcheck with --disable-module-dirauth in Travis.
7921 Implements ticket 27252.
7922 - Only run one online rust build in Travis, to reduce network
7923 errors. Skip offline rust builds on Travis for Linux gcc, because
7924 they're redundant. Implements ticket 27252.
7925 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
7926 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
7927 Linux with default settings, because all the non-default builds
7928 use gcc on Linux. Implements ticket 27252.
7930 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
7931 - Use the Travis Homebrew addon to install packages on macOS during
7932 Travis CI. The package list is the same, but the Homebrew addon
7933 does not do a `brew update` by default. Implements ticket 27738.
7935 o Minor features (geoip):
7936 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
7937 Country database. Closes ticket 27991.
7939 o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
7940 - Fix an integer overflow bug in our optimized 32-bit millisecond-
7941 difference algorithm for 32-bit Apple platforms. Previously, it
7942 would overflow when calculating the difference between two times
7943 more than 47 days apart. Fixes part of bug 27139; bugfix
7945 - Improve the precision of our 32-bit millisecond difference
7946 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
7947 bugfix on 0.3.4.1-alpha.
7948 - Relax the tolerance on the mainloop/update_time_jumps test when
7949 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
7952 o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
7953 - Avoid undefined behavior in an end-of-string check when parsing
7954 the BEGIN line in a directory object. Fixes bug 28202; bugfix
7957 o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
7958 - Only install the necessary mingw packages during our appveyor
7959 builds. This change makes the build a little faster, and prevents
7960 a conflict with a preinstalled mingw openssl that appveyor now
7961 ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
7963 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
7964 - Rewrite our assertion macros so that they no longer suppress the
7965 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
7967 o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
7968 - Stop reinstalling identical packages in our Windows CI. Fixes bug
7969 27464; bugfix on 0.3.4.1-alpha.
7971 o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
7972 - Log additional info when we get a relay that shares an ed25519 ID
7973 with a different relay, instead making a BUG() warning. Fixes bug
7974 27800; bugfix on 0.3.2.1-alpha.
7976 o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
7977 - Avoid a double-close when shutting down a stalled directory
7978 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
7980 o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
7981 - Fix a bug warning when closing an HTTP tunnel connection due to an
7982 HTTP request we couldn't handle. Fixes bug 26470; bugfix
7985 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
7986 - Ensure circuitmux queues are empty before scheduling or sending
7987 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
7989 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
7990 - When the onion service directory can't be created or has the wrong
7991 permissions, do not log a stack trace. Fixes bug 27335; bugfix
7994 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
7995 - Close all SOCKS request (for the same .onion) if the newly fetched
7996 descriptor is unusable. Before that, we would close only the first
7997 one leaving the other hanging and let to time out by themselves.
7998 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8000 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8001 - When selecting a v3 rendezvous point, don't only look at the
8002 protover, but also check whether the curve25519 onion key is
8003 present. This way we avoid picking a relay that supports the v3
8004 rendezvous but for which we don't have the microdescriptor. Fixes
8005 bug 27797; bugfix on 0.3.2.1-alpha.
8007 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
8008 - Reject protocol names containing bytes other than alphanumeric
8009 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8012 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
8013 - Compute protover votes correctly in the rust version of the
8014 protover code. Previously, the protover rewrite in 24031 allowed
8015 repeated votes from the same voter for the same protocol version
8016 to be counted multiple times in protover_compute_vote(). Fixes bug
8017 27649; bugfix on 0.3.3.5-rc.
8018 - Reject protover names that contain invalid characters. Fixes bug
8019 27687; bugfix on 0.3.3.1-alpha.
8021 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
8022 - protover_all_supported() would attempt to allocate up to 16GB on
8023 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8024 bugfix on 0.3.3.5-rc.
8026 o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
8027 - Fix an API mismatch in the rust implementation of
8028 protover_compute_vote(). This bug could have caused crashes on any
8029 directory authorities running Tor with Rust (which we do not yet
8030 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8032 o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
8033 - Fix a potential null dereference in protover_all_supported(). Add
8034 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8035 - Return a string that can be safely freed by C code, not one
8036 created by the rust allocator, in protover_all_supported(). Fixes
8037 bug 27740; bugfix on 0.3.3.1-alpha.
8039 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
8040 - If a unit test running in a subprocess exits abnormally or with a
8041 nonzero status code, treat the test as having failed, even if the
8042 test reported success. Without this fix, memory leaks don't cause
8043 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
8044 bugfix on 0.2.2.4-alpha.
8046 o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
8047 - Make the hs_service tests use the same time source when creating
8048 the introduction point and when testing it. Now tests work better
8049 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
8052 o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
8053 - Treat backtrace test failures as expected on BSD-derived systems
8054 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8055 (FreeBSD failures have been treated as expected since 18204 in
8056 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8059 Changes in version 0.3.5.3-alpha - 2018-10-17
8060 Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
8061 versions. One important fix for relays addresses a problem with rate-
8062 limiting code from back in 0.3.4.x: If the fix works out, we'll be
8063 backporting it soon. This release is still an alpha, but we hope it's
8064 getting closer and closer to stability.
8066 o Major features (onion services):
8067 - Version 3 onion services can now use the per-service
8068 HiddenServiceExportCircuitID option to differentiate client
8069 circuits. It communicates with the service by using the HAProxy
8070 protocol to assign virtual IP addresses to inbound client
8071 circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
8073 o Major bugfixes (compilation):
8074 - Fix compilation on ARM (and other less-used CPUs) when compiling
8075 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
8077 o Major bugfixes (initialization, crash):
8078 - Fix an assertion crash that would stop Tor from starting up if it
8079 tried to activate a periodic event too early. Fixes bug 27861;
8080 bugfix on 0.3.5.1-alpha.
8082 o Major bugfixes (mainloop, bootstrap):
8083 - Make sure Tor bootstraps and works properly if only the
8084 ControlPort is set. Prior to this fix, Tor would only bootstrap
8085 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
8086 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
8088 o Major bugfixes (relay):
8089 - When our write bandwidth limit is exhausted, stop writing on the
8090 connection. Previously, we had a typo in the code that would make
8091 us stop reading instead, leading to relay connections being stuck
8092 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
8095 o Minor features (continuous integration):
8096 - Use the Travis Homebrew addon to install packages on macOS during
8097 Travis CI. The package list is the same, but the Homebrew addon
8098 does not do a `brew update` by default. Implements ticket 27738.
8099 - Report what program produced the mysterious core file that we
8100 occasionally see on Travis CI during make distcheck. Closes
8103 o Minor features (geoip):
8104 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
8105 Country database. Closes ticket 27991.
8107 o Minor bugfixes (code safety):
8108 - Rewrite our assertion macros so that they no longer suppress the
8109 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8112 o Minor bugfixes (compilation):
8113 - Compile the ed25519-donna code with a correct declaration of
8114 crypto_strongest_rand(). Previously, we built it with one type,
8115 but linked it against another in the unit tests, which caused
8116 compilation failures with LTO enabled. This could have caused
8117 other undefined behavior in the tests. Fixes bug 27728; bugfix
8120 o Minor bugfixes (compilation, netbsd):
8121 - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
8124 o Minor bugfixes (continuous integration, appveyor):
8125 - Install only the necessary mingw packages during our appveyor
8126 builds. This change makes the build a little faster, and prevents
8127 a conflict with a preinstalled mingw openssl that appveyor now
8128 ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
8130 o Minor bugfixes (directory permissions):
8131 - When a user requests a group-readable DataDirectory, give it to
8132 them. Previously, when the DataDirectory and the CacheDirectory
8133 were the same, the default setting (0) for
8134 CacheDirectoryGroupReadable would override the setting for
8135 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8138 o Minor bugfixes (memory leaks):
8139 - Fix a small memory leak when calling Tor with --dump-config. Fixes
8140 bug 27893; bugfix on 0.3.2.1-alpha.
8142 o Minor bugfixes (networking):
8143 - In retry_listeners_ports(), make sure that we're removing a member
8144 of old_conns smartlist at most once. Fixes bug 27808; bugfix
8146 - Refrain from attempting socket rebinding when old and new
8147 listeners are in different address families. Fixes bug 27928;
8148 bugfix on 0.3.5.1-alpha.
8150 o Minor bugfixes (onion service v3):
8151 - Stop dumping a stack trace when trying to connect to an intro
8152 point without having a descriptor for it. Fixes bug 27774; bugfix
8154 - Don't warn so loudly when Tor is unable to decode an onion
8155 descriptor. This can now happen as a normal use case if a client
8156 gets a descriptor with client authorization but the client is not
8157 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8158 - When selecting a v3 rendezvous point, don't only look at the
8159 protover, but also check whether the curve25519 onion key is
8160 present. This way we avoid picking a relay that supports the v3
8161 rendezvous but for which we don't have the microdescriptor. Fixes
8162 bug 27797; bugfix on 0.3.2.1-alpha.
8164 o Minor bugfixes (protover):
8165 - Reject protocol names containing bytes other than alphanumeric
8166 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8169 o Minor bugfixes (testing):
8170 - Make the hs_service tests use the same time source when creating
8171 the introduction point and when testing it. Now tests work better
8172 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
8174 - In test_rebind.py, check if the Python version is in the supported
8175 range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
8177 o Code simplification and refactoring:
8178 - Divide more large Tor source files -- especially ones that span
8179 multiple areas of functionality -- into smaller parts, including
8180 onion.c and main.c. Closes ticket 26747.
8181 - Divide the "routerparse.c" module into separate modules for each
8182 group of parsed objects. Closes ticket 27924.
8183 - Move protover_rust.c to the same place protover.c was moved to.
8184 Closes ticket 27814.
8185 - Split directory.c into separate pieces for client, server, and
8186 common functionality. Closes ticket 26744.
8187 - Split the non-statistics-related parts from the rephist.c and
8188 geoip.c modules. Closes ticket 27892.
8189 - Split the router.c file into relay-only and shared components, to
8190 help with future modularization. Closes ticket 27864.
8193 - In the tor-resolve(1) manpage, fix the reference to socks-
8194 extensions.txt by adding a web URL. Resolves ticket 27853.
8195 - Mention that we require Python to be 2.7 or newer for some
8196 integration tests that we ship with Tor. Resolves ticket 27677.
8199 Changes in version 0.3.5.2-alpha - 2018-09-21
8200 Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
8201 that made Tor think it had run out of sockets. Anybody running a relay
8202 or an onion service on 0.3.5.1-alpha should upgrade.
8204 o Major bugfixes (relay bandwidth statistics):
8205 - When we close relayed circuits, report the data in the circuit
8206 queues as being written in our relay bandwidth stats. This
8207 mitigates guard discovery and other attacks that close circuits
8208 for the explicit purpose of noticing this discrepancy in
8209 statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
8211 o Major bugfixes (socket accounting):
8212 - In our socket accounting code, count a socket as closed even when
8213 it is closed indirectly by the TLS layer. Previously, we would
8214 count these sockets as still in use, and incorrectly believe that
8215 we had run out of sockets. Fixes bug 27795; bugfix
8218 o Minor bugfixes (32-bit OSX and iOS, timing):
8219 - Fix an integer overflow bug in our optimized 32-bit millisecond-
8220 difference algorithm for 32-bit Apple platforms. Previously, it
8221 would overflow when calculating the difference between two times
8222 more than 47 days apart. Fixes part of bug 27139; bugfix
8224 - Improve the precision of our 32-bit millisecond difference
8225 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
8226 bugfix on 0.3.4.1-alpha.
8227 - Relax the tolerance on the mainloop/update_time_jumps test when
8228 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
8231 o Minor bugfixes (onion service v3):
8232 - Close all SOCKS request (for the same .onion) if the newly fetched
8233 descriptor is unusable. Before that, we would close only the first
8234 one leaving the other hanging and let to time out by themselves.
8235 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8237 o Minor bugfixes (memory leak):
8238 - Fix an unlikely memory leak when trying to read a private key from
8239 a ridiculously large file. Fixes bug 27764; bugfix on
8240 0.3.5.1-alpha. This is CID 1439488.
8242 o Minor bugfixes (NSS):
8243 - Correctly detect failure to open a dummy TCP socket when stealing
8244 ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
8247 o Minor bugfixes (rust):
8248 - protover_all_supported() would attempt to allocate up to 16GB on
8249 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8250 bugfix on 0.3.3.5-rc.
8252 o Minor bugfixes (testing):
8253 - Revise the "conditionvar_timeout" test so that it succeeds even on
8254 heavily loaded systems where the test threads are not scheduled
8255 within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
8257 o Code simplification and refactoring:
8258 - Divide the routerlist.c and dirserv.c modules into smaller parts.
8259 Closes ticket 27799.
8262 Changes in version 0.3.5.1-alpha - 2018-09-18
8263 Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
8264 client authorization for modern (v3) onion services, improves
8265 bootstrap reporting, begins reorganizing Tor's codebase, adds optional
8266 support for NSS in place of OpenSSL, and much more.
8268 o Major features (onion services, UI change):
8269 - For a newly created onion service, the default version is now 3.
8270 Tor still supports existing version 2 services, but the operator
8271 now needs to set "HiddenServiceVersion 2" in order to create a new
8272 version 2 service. For existing services, Tor now learns the
8273 version by reading the key file. Closes ticket 27215.
8275 o Major features (relay, UI change):
8276 - Relays no longer run as exits by default. If the "ExitRelay"
8277 option is auto (or unset), and no exit policy is specified with
8278 ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
8279 Previously in this case, we allowed exit traffic and logged a
8280 warning message. Closes ticket 21530. Patch by Neel Chauhan.
8281 - Tor now validates that the ContactInfo config option is valid UTF-
8282 8 when parsing torrc. Closes ticket 27428.
8284 o Major features (bootstrap):
8285 - Don't report directory progress until after a connection to a
8286 relay or bridge has succeeded. Previously, we'd report 80%
8287 progress based on cached directory information when we couldn't
8288 even connect to the network. Closes ticket 27169.
8290 o Major features (new code layout):
8291 - Nearly all of Tor's source code has been moved around into more
8292 logical places. The "common" directory is now divided into a set
8293 of libraries in "lib", and files in the "or" directory have been
8294 split into "core" (logic absolutely needed for onion routing),
8295 "feature" (independent modules in Tor), and "app" (to configure
8296 and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
8297 more information. Closes ticket 26481.
8299 This refactoring is not complete: although the libraries have been
8300 refactored to be acyclic, the main body of Tor is still too
8301 interconnected. We will attempt to improve this in the future.
8303 o Major features (onion services v3):
8304 - Implement onion service client authorization at the descriptor
8305 level: only authorized clients can decrypt a service's descriptor
8306 to find out how to contact it. A new torrc option was added to
8307 control this client side: ClientOnionAuthDir <path>. On the
8308 service side, if the "authorized_clients/" directory exists in the
8309 onion service directory path, client configurations are read from
8310 the files within. See the manpage for more details. Closes ticket
8311 27547. Patch done by Suphanat Chunhapanya (haxxpop).
8312 - Improve revision counter generation in next-gen onion services.
8313 Onion services can now scale by hosting multiple instances on
8314 different hosts without synchronization between them, which was
8315 previously impossible because descriptors would get rejected by
8316 HSDirs. Addresses ticket 25552.
8318 o Major features (portability, cryptography, experimental, TLS):
8319 - Tor now has the option to compile with the NSS library instead of
8320 OpenSSL. This feature is experimental, and we expect that bugs may
8321 remain. It is mainly intended for environments where Tor's
8322 performance is not CPU-bound, and where NSS is already known to be
8323 installed. To try it out, configure Tor with the --enable-nss
8324 flag. Closes tickets 26631, 26815, and 26816.
8326 If you are experimenting with this option and using an old cached
8327 consensus, Tor may fail to start. To solve this, delete your
8328 "cached-consensus" and "cached-microdesc-consensus" files,
8329 (if present), and restart Tor.
8331 o Major bugfixes (directory authority):
8332 - Actually check that the address we get from DirAuthority
8333 configuration line is valid IPv4. Explicitly disallow DirAuthority
8334 address to be a DNS hostname. Fixes bug 26488; bugfix
8337 o Major bugfixes (restart-in-process):
8338 - Fix a use-after-free error that could be caused by passing Tor an
8339 impossible set of options that would fail during options_act().
8340 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
8342 o Minor features (admin tools):
8343 - Add a new --key-expiration option to print the expiration date of
8344 the signing cert in an ed25519_signing_cert file. Resolves
8347 o Minor features (build):
8348 - If you pass the "--enable-pic" option to configure, Tor will try
8349 to tell the compiler to build position-independent code suitable
8350 to link into a dynamic library. (The default remains -fPIE, for
8351 code suitable for a relocatable executable.) Closes ticket 23846.
8353 o Minor features (code correctness, testing):
8354 - Tor's build process now includes a "check-includes" make target to
8355 verify that no module of Tor relies on any headers from a higher-
8356 level module. We hope to use this feature over time to help
8357 refactor our codebase. Closes ticket 26447.
8359 o Minor features (code layout):
8360 - We have a new "lowest-level" error-handling API for use by code
8361 invoked from within the logging module. With this interface, the
8362 logging code is no longer at risk of calling into itself if a
8363 failure occurs while it is trying to log something. Closes
8366 o Minor features (compilation):
8367 - Tor's configure script now supports a --with-malloc= option to
8368 select your malloc implementation. Supported options are
8369 "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
8370 default). Addresses part of ticket 20424. Based on a patch from
8373 o Minor features (config):
8374 - The "auto" keyword in torrc is now case-insensitive. Closes
8377 o Minor features (continuous integration):
8378 - Don't do a distcheck with --disable-module-dirauth in Travis.
8379 Implements ticket 27252.
8380 - Install libcap-dev and libseccomp2-dev so these optional
8381 dependencies get tested on Travis CI. Closes ticket 26560.
8382 - Only run one online rust build in Travis, to reduce network
8383 errors. Skip offline rust builds on Travis for Linux gcc, because
8384 they're redundant. Implements ticket 27252.
8385 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
8386 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
8387 Linux with default settings, because all the non-default builds
8388 use gcc on Linux. Implements ticket 27252.
8390 o Minor features (controller):
8391 - Emit CIRC_BW events as soon as we detect that we processed an
8392 invalid or otherwise dropped cell on a circuit. This allows
8393 vanguards and other controllers to react more quickly to dropped
8394 cells. Closes ticket 27678.
8395 - For purposes of CIRC_BW-based dropped cell detection, track half-
8396 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
8397 bias check cells to arrive without counting it as dropped until
8398 either the END arrives, or the windows are empty. Closes
8400 - Implement a 'GETINFO md/all' controller command to enable getting
8401 all known microdescriptors. Closes ticket 8323.
8402 - The GETINFO command now support an "uptime" argument, to return
8403 Tor's uptime in seconds. Closes ticket 25132.
8405 o Minor features (denial-of-service avoidance):
8406 - Make our OOM handler aware of the DNS cache so that it doesn't
8407 fill up the memory. This check is important for our DoS mitigation
8408 subsystem. Closes ticket 18642. Patch by Neel Chauhan.
8410 o Minor features (development):
8411 - Tor's makefile now supports running the "clippy" Rust style tool
8412 on our Rust code. Closes ticket 22156.
8414 o Minor features (directory authority):
8415 - There is no longer an artificial upper limit on the length of
8416 bandwidth lines. Closes ticket 26223.
8417 - When a bandwidth file is used to obtain the bandwidth measurements,
8418 include this bandwidth file headers in the votes. Closes
8420 - Improved support for networks with only a single authority or a
8421 single fallback directory. Patch from Gabriel Somlo. Closes
8424 o Minor features (embedding API):
8425 - The Tor controller API now supports a function to launch Tor with
8426 a preconstructed owning controller FD, so that embedding
8427 applications don't need to manage controller ports and
8428 authentication. Closes ticket 24204.
8429 - The Tor controller API now has a function that returns the name
8430 and version of the backend implementing the API. Closes
8433 o Minor features (geoip):
8434 - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
8435 Country database. Closes ticket 27631.
8437 o Minor features (memory management):
8438 - Get Libevent to use the same memory allocator as Tor, by calling
8439 event_set_mem_functions() during initialization. Resolves
8442 o Minor features (memory usage):
8443 - When not using them, store legacy TAP public onion keys in DER-
8444 encoded format, rather than as expanded public keys. This should
8445 save several megabytes on typical clients. Closes ticket 27246.
8447 o Minor features (OpenSSL):
8448 - When possible, use RFC5869 HKDF implementation from OpenSSL rather
8449 than our own. Resolves ticket 19979.
8451 o Minor features (Rust, code quality):
8452 - Improve rust code quality in the rust protover implementation by
8453 making it more idiomatic. Includes changing an internal API to
8454 take &str instead of &String. Closes ticket 26492.
8456 o Minor features (testing):
8457 - Add scripts/test/chutney-git-bisect.sh, for bisecting using
8458 chutney. Implements ticket 27211.
8460 o Minor features (tor-resolve):
8461 - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
8462 Side-effect of the refactoring for ticket 26526.
8464 o Minor features (UI):
8465 - Log each included configuration file or directory as we read it,
8466 to provide more visibility about where Tor is reading from. Patch
8467 from Unto Sten; closes ticket 27186.
8468 - Lower log level of "Scheduler type KIST has been enabled" to INFO.
8469 Closes ticket 26703.
8471 o Minor bugfixes (bootstrap):
8472 - Try harder to get descriptors in non-exit test networks, by using
8473 the mid weight for the third hop when there are no exits. Fixes
8474 bug 27237; bugfix on 0.2.6.2-alpha.
8476 o Minor bugfixes (C correctness):
8477 - Avoid casting smartlist index to int implicitly, as it may trigger
8478 a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
8479 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
8480 - Use time_t for all values in
8481 predicted_ports_prediction_time_remaining(). Rework the code that
8482 computes difference between durations/timestamps. Fixes bug 27165;
8483 bugfix on 0.3.1.1-alpha.
8485 o Minor bugfixes (client, memory usage):
8486 - When not running as a directory cache, there is no need to store
8487 the text of the current consensus networkstatus in RAM.
8488 Previously, however, clients would store it anyway, at a cost of
8489 over 5 MB. Now, they do not. Fixes bug 27247; bugfix
8492 o Minor bugfixes (client, reachableaddresses):
8493 - Instead of adding a "reject *:*" line to ReachableAddresses when
8494 loading the configuration, add one to the policy after parsing it
8495 in parse_reachable_addresses(). This prevents extra "reject *.*"
8496 lines from accumulating on reloads. Fixes bug 20874; bugfix on
8497 0.1.1.5-alpha. Patch by Neel Chauhan.
8499 o Minor bugfixes (code quality):
8500 - Rename sandbox_getaddrinfo() and other functions to no longer
8501 misleadingly suggest that they are sandbox-only. Fixes bug 26525;
8502 bugfix on 0.2.7.1-alpha.
8504 o Minor bugfixes (configuration, Onion Services):
8505 - In rend_service_parse_port_config(), disallow any input to remain
8506 after address-port pair was parsed. This will catch address and
8507 port being whitespace-separated by mistake of the user. Fixes bug
8508 27044; bugfix on 0.2.9.10.
8510 o Minor bugfixes (continuous integration):
8511 - Stop reinstalling identical packages in our Windows CI. Fixes bug
8512 27464; bugfix on 0.3.4.1-alpha.
8514 o Minor bugfixes (controller):
8515 - Consider all routerinfo errors other than "not a server" to be
8516 transient for the purpose of "GETINFO exit-policy/*" controller
8517 request. Print stacktrace in the unlikely case of failing to
8518 recompute routerinfo digest. Fixes bug 27034; bugfix
8521 o Minor bugfixes (directory connection shutdown):
8522 - Avoid a double-close when shutting down a stalled directory
8523 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
8525 o Minor bugfixes (HTTP tunnel):
8526 - Fix a bug warning when closing an HTTP tunnel connection due to an
8527 HTTP request we couldn't handle. Fixes bug 26470; bugfix
8530 o Minor bugfixes (ipv6):
8531 - In addrs_in_same_network_family(), we choose the subnet size based
8532 on the IP version (IPv4 or IPv6). Previously, we chose a fixed
8533 subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
8534 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
8536 o Minor bugfixes (logging):
8537 - As a precaution, do an early return from log_addr_has_changed() if
8538 Tor is running as client. Also, log a stack trace for debugging as
8539 this function should only be called when Tor runs as server. Fixes
8540 bug 26892; bugfix on 0.1.1.9-alpha.
8541 - Refrain from mentioning bug 21018 in the logs, as it is already
8542 fixed. Fixes bug 25477; bugfix on 0.2.9.8.
8544 o Minor bugfixes (logging, documentation):
8545 - When SafeLogging is enabled, scrub IP address in
8546 channel_tls_process_netinfo_cell(). Also, add a note to manpage
8547 that scrubbing is not guaranteed on loglevels below Notice. Fixes
8548 bug 26882; bugfix on 0.2.4.10-alpha.
8550 o Minor bugfixes (netflow padding):
8551 - Ensure circuitmux queues are empty before scheduling or sending
8552 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
8554 o Minor bugfixes (onion service v2):
8555 - Log at level "info", not "warning", in the case that we do not
8556 have a consensus when a .onion request comes in. This can happen
8557 normally while bootstrapping. Fixes bug 27040; bugfix
8560 o Minor bugfixes (onion service v3):
8561 - When the onion service directory can't be created or has the wrong
8562 permissions, do not log a stack trace. Fixes bug 27335; bugfix
8565 o Minor bugfixes (OS compatibility):
8566 - Properly handle configuration changes that move a listener to/from
8567 wildcard IP address. If the first attempt to bind a socket fails,
8568 close the old listener and try binding the socket again. Fixes bug
8569 17873; bugfix on 0.0.8pre-1.
8571 o Minor bugfixes (performance)::
8572 - Rework node_is_a_configured_bridge() to no longer call
8573 node_get_all_orports(), which was performing too many memory
8574 allocations. Fixes bug 27224; bugfix on 0.2.3.9.
8576 o Minor bugfixes (relay statistics):
8577 - Update relay descriptor on bandwidth changes only when the uptime
8578 is smaller than 24h, in order to reduce the efficiency of guard
8579 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8581 o Minor bugfixes (relays):
8582 - Consider the fact that we'll be making direct connections to our
8583 entry and guard nodes when computing the fraction of nodes that
8584 have their descriptors. Also, if we are using bridges and there is
8585 at least one bridge with a full descriptor, treat the fraction of
8586 guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
8587 Patch by Neel Chauhan.
8588 - Update the message logged on relays when DirCache is disabled.
8589 Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
8590 Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
8592 o Minor bugfixes (rust, protover):
8593 - Compute protover votes correctly in the rust version of the
8594 protover code. Previously, the protover rewrite in 24031 allowed
8595 repeated votes from the same voter for the same protocol version
8596 to be counted multiple times in protover_compute_vote(). Fixes bug
8597 27649; bugfix on 0.3.3.5-rc.
8598 - Reject protover names that contain invalid characters. Fixes bug
8599 27687; bugfix on 0.3.3.1-alpha.
8601 o Minor bugfixes (testing):
8602 - Fix two unit tests to work when HOME environment variable is not
8603 set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
8604 - If a unit test running in a subprocess exits abnormally or with a
8605 nonzero status code, treat the test as having failed, even if the
8606 test reported success. Without this fix, memory leaks don't cause
8607 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
8608 bugfix on 0.2.2.4-alpha.
8609 - When logging a version mismatch in our openssl_version tests,
8610 report the actual offending version strings. Fixes bug 26152;
8611 bugfix on 0.2.9.1-alpha.
8612 - Fix forking tests on Windows when there is a space somewhere in
8613 the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
8615 o Code simplification and refactoring:
8616 - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
8617 longer needed. Closes ticket 26502.
8618 - Include paths to header files within Tor are now qualified by
8619 directory within the top-level src directory.
8620 - Many structures have been removed from the centralized "or.h"
8621 header, and moved into their own headers. This will allow us to
8622 reduce the number of places in the code that rely on each
8623 structure's contents and layout. Closes ticket 26383.
8624 - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
8625 - Remove GetAdaptersAddresses_fn_t. The code that used it was
8626 removed as part of the 26481 refactor. Closes ticket 27467.
8627 - Rework Tor SOCKS server code to use Trunnel and benefit from
8628 autogenerated functions for parsing and generating SOCKS wire
8629 format. New implementation is cleaner, more maintainable and
8630 should be less prone to heartbleed-style vulnerabilities.
8631 Implements a significant fraction of ticket 3569.
8632 - Split sampled_guards_update_from_consensus() and
8633 select_entry_guard_for_circuit() into subfunctions. In
8634 entry_guards_update_primary() unite three smartlist enumerations
8635 into one and move smartlist comparison code out of the function.
8636 Closes ticket 21349.
8637 - Tor now assumes that you have standards-conformant stdint.h and
8638 inttypes.h headers when compiling. Closes ticket 26626.
8639 - Unify our bloom filter logic. Previously we had two copies of this
8640 code: one for routerlist filtering, and one for address set
8641 calculations. Closes ticket 26510.
8642 - Use the simpler strcmpstart() helper in
8643 rend_parse_v2_service_descriptor instead of strncmp(). Closes
8645 - Utility functions that can perform a DNS lookup are now wholly
8646 separated from those that can't, in separate headers and C
8647 modules. Closes ticket 26526.
8650 - Copy paragraph and URL to Tor's code of conduct document from
8651 CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
8652 - Remove old instructions from INSTALL document. Closes ticket 26588.
8653 - Warn users that they should not include MyFamily line(s) in their
8654 torrc when running Tor bridge. Closes ticket 26908.
8657 - Tor no longer supports building with the dmalloc library. For
8658 debugging memory issues, we suggest using gperftools or msan
8659 instead. Closes ticket 26426.
8660 - Tor no longer attempts to run on Windows environments without the
8661 GetAdaptersAddresses() function. This function has existed since
8662 Windows XP, which is itself already older than we support.
8663 - Remove Tor2web functionality for version 2 onion services. The
8664 Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
8665 (This feature was never shipped in vanilla Tor and it was only
8666 possible to use this feature by building the support at compile
8667 time. Tor2webMode is not implemented for version 3 onion services.)
8668 Closes ticket 26367.
8671 Changes in version 0.2.9.17 - 2018-09-10
8672 Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
8674 o Minor features (compatibility, backport from 0.3.4.8):
8675 - Tell OpenSSL to maintain backward compatibility with previous
8676 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8677 ciphers are disabled by default. Closes ticket 27344.
8679 o Minor features (continuous integration, backport from 0.3.4.7-rc):
8680 - Enable macOS builds in our Travis CI configuration. Closes
8682 - Install libcap-dev and libseccomp2-dev so these optional
8683 dependencies get tested on Travis CI. Closes ticket 26560.
8684 - Run asciidoc during Travis CI. Implements ticket 27087.
8685 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8687 o Minor features (geoip):
8688 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8689 Country database. Closes ticket 27089.
8691 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
8692 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8693 tell the compiler not to include the system malloc implementation.
8694 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8696 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
8697 - Silence a spurious compiler warning on the GetAdaptersAddresses
8698 function pointer cast. This issue is already fixed by 26481 in
8699 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8700 bugfix on 0.2.3.11-alpha.
8701 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8702 supported, and always fails. Some compilers warn about the
8703 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8706 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
8707 - Don't link or search for pthreads when building for Windows, even
8708 if we are using build environment (like mingw) that provides a
8709 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8711 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
8712 - Skip a pair of unreliable key generation tests on Windows, until
8713 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8714 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8716 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
8717 - Pass the module flags to distcheck configure, and log the flags
8718 before running configure. (Backported to 0.2.9 and later as a
8719 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8721 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
8722 - When a Travis build fails, and showing a log fails, keep trying to
8723 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8724 - When we use echo in Travis, don't pass a --flag as the first
8725 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8727 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
8728 - When voting for recommended versions, make sure that all of the
8729 versions are well-formed and parsable. Fixes bug 26485; bugfix
8732 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
8733 - Fix a bug in out sandboxing rules for the openat() syscall.
8734 Previously, no openat() call would be permitted, which would break
8735 filesystem operations on recent glibc versions. Fixes bug 25440;
8736 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
8738 o Minor bugfixes (onion services, backport from 0.3.4.8):
8739 - Silence a spurious compiler warning in
8740 rend_client_send_introduction(). Fixes bug 27463; bugfix
8743 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
8744 - Log a protocol warning when single onion services or Tor2web clients
8745 fail to authenticate direct connections to relays.
8746 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
8748 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
8749 - Disable core dumps in test_bt.sh, to avoid failures in "make
8750 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
8752 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
8753 - Before running make test-network-all, delete old logs and test
8754 result files, to avoid spurious failures. Fixes bug 27295; bugfix
8757 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
8758 - Our "tortls/cert_matches_key" unit test no longer relies on
8759 OpenSSL internals. Previously, it relied on unsupported OpenSSL
8760 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
8761 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
8763 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
8764 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
8765 27185; bugfix on 0.2.2.2-alpha.
8768 Changes in version 0.3.2.12 - 2018-09-10
8769 Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
8771 o Minor features (compatibility, backport from 0.3.4.8):
8772 - Tell OpenSSL to maintain backward compatibility with previous
8773 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8774 ciphers are disabled by default. Closes ticket 27344.
8776 o Minor features (continuous integration, backport from 0.3.4.7-rc):
8777 - Enable macOS builds in our Travis CI configuration. Closes
8779 - Install libcap-dev and libseccomp2-dev so these optional
8780 dependencies get tested on Travis CI. Closes ticket 26560.
8781 - Run asciidoc during Travis CI. Implements ticket 27087.
8782 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8784 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
8785 - Use cargo cache in our Travis CI configuration. Closes
8788 o Minor features (controller, backport from 0.3.4.6-rc):
8789 - The control port now exposes the list of HTTPTunnelPorts and
8790 ExtOrPorts via GETINFO net/listeners/httptunnel and
8791 net/listeners/extor respectively. Closes ticket 26647.
8793 o Minor features (directory authorities, backport from 0.3.4.7-rc):
8794 - Authorities no longer vote to make the subprotocol version
8795 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
8796 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
8798 o Minor features (geoip):
8799 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8800 Country database. Closes ticket 27089.
8802 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
8803 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8804 tell the compiler not to include the system malloc implementation.
8805 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8806 - Don't try to use a pragma to temporarily disable the
8807 -Wunused-const-variable warning if the compiler doesn't support
8808 it. Fixes bug 26785; bugfix on 0.3.2.11.
8810 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
8811 - Silence a spurious compiler warning on the GetAdaptersAddresses
8812 function pointer cast. This issue is already fixed by 26481 in
8813 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8814 bugfix on 0.2.3.11-alpha.
8815 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8816 supported, and always fails. Some compilers warn about the
8817 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8820 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
8821 - Don't link or search for pthreads when building for Windows, even
8822 if we are using build environment (like mingw) that provides a
8823 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8825 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
8826 - Skip a pair of unreliable key generation tests on Windows, until
8827 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8828 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8830 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
8831 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
8832 - Pass the module flags to distcheck configure, and log the flags
8833 before running configure. (Backported to 0.2.9 and later as a
8834 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8836 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
8837 - When a Travis build fails, and showing a log fails, keep trying to
8838 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8839 - When we use echo in Travis, don't pass a --flag as the first
8840 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8842 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
8843 - When voting for recommended versions, make sure that all of the
8844 versions are well-formed and parsable. Fixes bug 26485; bugfix
8847 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
8848 - Fix a bug in out sandboxing rules for the openat() syscall.
8849 Previously, no openat() call would be permitted, which would break
8850 filesystem operations on recent glibc versions. Fixes bug 25440;
8851 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
8853 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
8854 - Improve the log message when connection initiators fail to
8855 authenticate direct connections to relays. Fixes bug 26927; bugfix
8858 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
8859 - Fix bug that causes services to not ever rotate their descriptors
8860 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
8863 o Minor bugfixes (onion services, backport from 0.3.4.8):
8864 - Silence a spurious compiler warning in
8865 rend_client_send_introduction(). Fixes bug 27463; bugfix
8868 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
8869 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
8871 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
8872 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
8873 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
8874 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
8876 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
8877 - Log a protocol warning when single onion services or Tor2web clients
8878 fail to authenticate direct connections to relays.
8879 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
8881 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
8882 - Disable core dumps in test_bt.sh, to avoid failures in "make
8883 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
8885 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
8886 - When running make test-network-all, use the mixed+hs-v2 network.
8887 (A previous fix to chutney removed v3 onion services from the
8888 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
8889 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
8890 - Before running make test-network-all, delete old logs and test
8891 result files, to avoid spurious failures. Fixes bug 27295; bugfix
8894 o Minor bugfixes (testing, openssl compatibility):
8895 - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
8896 internals. Previously, it relied on unsupported OpenSSL behavior in
8897 a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
8898 bugfix on 0.2.5.1-alpha.
8900 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
8901 - Our "tortls/cert_matches_key" unit test no longer relies on
8902 OpenSSL internals. Previously, it relied on unsupported OpenSSL
8903 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
8904 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
8906 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
8907 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
8908 27185; bugfix on 0.2.2.2-alpha.
8911 Changes in version 0.3.3.10 - 2018-09-10
8912 Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
8914 o Minor features (bug workaround, backport from 0.3.4.7-rc):
8915 - Compile correctly on systems that provide the C11 stdatomic.h
8916 header, but where C11 atomic functions don't actually compile.
8917 Closes ticket 26779; workaround for Debian issue 903709.
8919 o Minor features (compatibility, backport from 0.3.4.8):
8920 - Tell OpenSSL to maintain backward compatibility with previous
8921 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8922 ciphers are disabled by default. Closes ticket 27344.
8924 o Minor features (continuous integration, backport from 0.3.4.7-rc):
8925 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
8926 - Enable macOS builds in our Travis CI configuration. Closes
8928 - Install libcap-dev and libseccomp2-dev so these optional
8929 dependencies get tested on Travis CI. Closes ticket 26560.
8930 - Run asciidoc during Travis CI. Implements ticket 27087.
8931 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8933 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
8934 - Use cargo cache in our Travis CI configuration. Closes
8937 o Minor features (controller, backport from 0.3.4.6-rc):
8938 - The control port now exposes the list of HTTPTunnelPorts and
8939 ExtOrPorts via GETINFO net/listeners/httptunnel and
8940 net/listeners/extor respectively. Closes ticket 26647.
8942 o Minor features (directory authorities, backport from 0.3.4.7-rc):
8943 - Authorities no longer vote to make the subprotocol version
8944 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
8945 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
8947 o Minor features (geoip):
8948 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8949 Country database. Closes ticket 27089.
8951 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
8952 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8953 tell the compiler not to include the system malloc implementation.
8954 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8955 - Don't try to use a pragma to temporarily disable the
8956 -Wunused-const-variable warning if the compiler doesn't support
8957 it. Fixes bug 26785; bugfix on 0.3.2.11.
8959 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
8960 - Silence a spurious compiler warning on the GetAdaptersAddresses
8961 function pointer cast. This issue is already fixed by 26481 in
8962 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8963 bugfix on 0.2.3.11-alpha.
8964 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8965 supported, and always fails. Some compilers warn about the
8966 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8969 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
8970 - Don't link or search for pthreads when building for Windows, even
8971 if we are using build environment (like mingw) that provides a
8972 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8974 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
8975 - Skip a pair of unreliable key generation tests on Windows, until
8976 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8977 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8979 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
8980 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
8981 - Pass the module flags to distcheck configure, and log the flags
8982 before running configure. (Backported to 0.2.9 and later as a
8983 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8985 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
8986 - When a Travis build fails, and showing a log fails, keep trying to
8987 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8988 - When we use echo in Travis, don't pass a --flag as the first
8989 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8991 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
8992 - When voting for recommended versions, make sure that all of the
8993 versions are well-formed and parsable. Fixes bug 26485; bugfix
8996 o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
8997 - Always call tor_free_all() when leaving tor_run_main(). When we
8998 did not, restarting tor in-process would cause an assertion
8999 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
9001 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9002 - Fix a bug in our sandboxing rules for the openat() syscall.
9003 Previously, no openat() call would be permitted, which would break
9004 filesystem operations on recent glibc versions. Fixes bug 25440;
9005 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9007 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
9008 - Improve the log message when connection initiators fail to
9009 authenticate direct connections to relays. Fixes bug 26927; bugfix
9012 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
9013 - Fix bug that causes services to not ever rotate their descriptors
9014 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
9017 o Minor bugfixes (onion services, backport from 0.3.4.8):
9018 - Silence a spurious compiler warning in
9019 rend_client_send_introduction(). Fixes bug 27463; bugfix
9022 o Minor bugfixes (portability, backport from 0.3.4.6-rc):
9023 - Work around two different bugs in the OS X 10.10 and later SDKs
9024 that would prevent us from successfully targeting earlier versions
9025 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
9027 o Minor bugfixes (portability, backport from 0.3.4.7-rc):
9028 - Fix compilation of the unit tests on GNU/Hurd, which does not
9029 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
9032 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
9033 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
9035 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
9036 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
9037 - Protover parsing was accepting the presence of whitespace in
9038 version strings, which the C implementation would choke on, e.g.
9039 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
9040 - Protover parsing was ignoring a 2nd hyphen and everything after
9041 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
9043 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
9044 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
9045 - cd to ${abs_top_builddir}/src/rust before running cargo in
9046 src/test/test_rust.sh. This makes the working directory consistent
9047 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
9049 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9050 - Log a protocol warning when single onion services or Tor2web clients
9051 fail to authenticate direct connections to relays.
9052 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9054 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9055 - Disable core dumps in test_bt.sh, to avoid failures in "make
9056 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9058 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9059 - When running make test-network-all, use the mixed+hs-v2 network.
9060 (A previous fix to chutney removed v3 onion services from the
9061 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
9062 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
9063 - Before running make test-network-all, delete old logs and test
9064 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9067 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9068 - Our "tortls/cert_matches_key" unit test no longer relies on
9069 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9070 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9071 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9073 o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
9074 - Stop sending ed25519 link specifiers in v3 onion service introduce
9075 cells and descriptors, when the rendezvous or introduction point
9076 doesn't support ed25519 link authentication. Fixes bug 26627;
9077 bugfix on 0.3.2.4-alpha.
9079 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9080 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9081 27185; bugfix on 0.2.2.2-alpha.
9084 Changes in version 0.3.4.8 - 2018-09-10
9085 Tor 0.3.4.8 is the first stable release in its series; it includes
9086 compilation and portability fixes.
9088 The Tor 0.3.4 series includes improvements for running Tor in
9089 low-power and embedded environments, which should help performance in
9090 general. We've begun work on better modularity, and included preliminary
9091 changes on the directory authority side to accommodate a new bandwidth
9092 measurement system. We've also integrated more continuous-integration
9093 systems into our development process, and made corresponding changes to
9094 Tor's testing infrastructure. Finally, we've continued to refine
9095 our anti-denial-of-service code.
9097 Below are the changes since 0.3.4.7-rc. For a complete list of changes
9098 since 0.3.3.9, see the ReleaseNotes file.
9100 o Minor features (compatibility):
9101 - Tell OpenSSL to maintain backward compatibility with previous
9102 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9103 ciphers are disabled by default. Closes ticket 27344.
9105 o Minor features (continuous integration):
9106 - Log the compiler path and version during Appveyor builds.
9107 Implements ticket 27449.
9108 - Show config.log and test-suite.log after failed Appveyor builds.
9109 Also upload the zipped full logs as a build artifact. Implements
9112 o Minor bugfixes (compilation):
9113 - Silence a spurious compiler warning on the GetAdaptersAddresses
9114 function pointer cast. This issue is already fixed by 26481 in
9115 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9116 bugfix on 0.2.3.11-alpha.
9117 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9118 supported, and always fails. Some compilers warn about the
9119 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9122 o Minor bugfixes (continuous integration):
9123 - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
9124 August 29 2018, Appveyor images come with gcc 8.2.0 by default.
9125 Executables compiled for 64-bit Windows with this version of gcc
9126 crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
9127 27460; bugfix on 0.3.4.1-alpha.
9128 - When a Travis build fails, and showing a log fails, keep trying to
9129 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9130 - When we use echo in Travis, don't pass a --flag as the first
9131 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9133 o Minor bugfixes (onion services):
9134 - Silence a spurious compiler warning in
9135 rend_client_send_introduction(). Fixes bug 27463; bugfix
9138 o Minor bugfixes (testing, chutney):
9139 - When running make test-network-all, use the mixed+hs-v2 network.
9140 (A previous fix to chutney removed v3 onion services from the
9141 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
9142 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
9143 - Before running make test-network-all, delete old logs and test
9144 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9147 Changes in version 0.3.4.7-rc - 2018-08-24
9148 Tor 0.3.4.7-rc fixes several small compilation, portability, and
9149 correctness issues in previous versions of Tor. This version is a
9150 release candidate: if no serious bugs are found, we expect that the
9151 stable 0.3.4 release will be (almost) the same as this release.
9153 o Minor features (bug workaround):
9154 - Compile correctly on systems that provide the C11 stdatomic.h
9155 header, but where C11 atomic functions don't actually compile.
9156 Closes ticket 26779; workaround for Debian issue 903709.
9158 o Minor features (continuous integration):
9159 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
9160 - Enable macOS builds in our Travis CI configuration. Closes
9162 - Install libcap-dev and libseccomp2-dev so these optional
9163 dependencies get tested on Travis CI. Closes ticket 26560.
9164 - Only post Appveyor IRC notifications when the build fails.
9165 Implements ticket 27275.
9166 - Run asciidoc during Travis CI. Implements ticket 27087.
9167 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9169 o Minor features (continuous integration, rust):
9170 - Use cargo cache in our Travis CI configuration. Closes
9173 o Minor features (directory authorities):
9174 - Authorities no longer vote to make the subprotocol version
9175 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
9176 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
9178 o Minor features (geoip):
9179 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9180 Country database. Closes ticket 27089.
9182 o Minor bugfixes (compilation, windows):
9183 - Don't link or search for pthreads when building for Windows, even
9184 if we are using build environment (like mingw) that provides a
9185 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9187 o Minor bugfixes (continuous integration):
9188 - Improve Appveyor CI IRC logging. Generate correct branches and
9189 URLs for pull requests and tags. Use unambiguous short commits.
9190 Fixes bug 26979; bugfix on master.
9191 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
9192 - Pass the module flags to distcheck configure, and log the flags
9193 before running configure. (Backported to 0.2.9 and later as a
9194 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9196 o Minor bugfixes (in-process restart):
9197 - Always call tor_free_all() when leaving tor_run_main(). When we
9198 did not, restarting tor in-process would cause an assertion
9199 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
9201 o Minor bugfixes (linux seccomp2 sandbox):
9202 - Fix a bug in out sandboxing rules for the openat() syscall.
9203 Previously, no openat() call would be permitted, which would break
9204 filesystem operations on recent glibc versions. Fixes bug 25440;
9205 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9207 o Minor bugfixes (onion services):
9208 - Fix bug that causes services to not ever rotate their descriptors
9209 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
9212 o Minor bugfixes (portability):
9213 - Fix compilation of the unit tests on GNU/Hurd, which does not
9214 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
9217 o Minor bugfixes (rust):
9218 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
9220 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
9221 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
9222 - Protover parsing was accepting the presence of whitespace in
9223 version strings, which the C implementation would choke on, e.g.
9224 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
9225 - Protover parsing was ignoring a 2nd hyphen and everything after
9226 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
9228 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
9229 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
9230 - cd to ${abs_top_builddir}/src/rust before running cargo in
9231 src/test/test_rust.sh. This makes the working directory consistent
9232 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
9234 o Minor bugfixes (testing, bootstrap):
9235 - When calculating bootstrap progress, check exit policies and the
9236 exit flag. Previously, Tor would only check the exit flag, which
9237 caused race conditions in small and fast networks like chutney.
9238 Fixes bug 27236; bugfix on 0.2.6.3-alpha.
9240 o Minor bugfixes (testing, openssl compatibility):
9241 - Our "tortls/cert_matches_key" unit test no longer relies on
9242 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9243 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9244 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9246 o Minor bugfixes (Windows, compilation):
9247 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9248 27185; bugfix on 0.2.2.2-alpha.
9251 Changes in version 0.3.4.6-rc - 2018-08-06
9252 Tor 0.3.4.6-rc fixes several small compilation, portability, and
9253 correctness issues in previous versions of Tor. This version is a
9254 release candidate: if no serious bugs are found, we expect that the
9255 stable 0.3.4 release will be (almost) the same as this release.
9257 o Major bugfixes (event scheduler):
9258 - When we enable a periodic event, schedule it in the event loop
9259 rather than running it immediately. Previously, we would re-run
9260 periodic events immediately in the middle of (for example)
9261 changing our options, with unpredictable effects. Fixes bug 27003;
9262 bugfix on 0.3.4.1-alpha.
9264 o Minor features (compilation):
9265 - When building Tor, prefer to use Python 3 over Python 2, and more
9266 recent (contemplated) versions over older ones. Closes
9268 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9269 tell the compiler not to include the system malloc implementation.
9270 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9271 - Don't try to use a pragma to temporarily disable the
9272 -Wunused-const-variable warning if the compiler doesn't support
9273 it. Fixes bug 26785; bugfix on 0.3.2.11.
9275 o Minor bugfixes (continuous integration):
9276 - Skip a pair of unreliable key generation tests on Windows, until
9277 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9278 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9280 o Minor features (controller):
9281 - The control port now exposes the list of HTTPTunnelPorts and
9282 ExtOrPorts via GETINFO net/listeners/httptunnel and
9283 net/listeners/extor respectively. Closes ticket 26647.
9285 o Minor bugfixes (directory authority):
9286 - When voting for recommended versions, make sure that all of the
9287 versions are well-formed and parsable. Fixes bug 26485; bugfix
9290 o Minor features (geoip):
9291 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
9292 Country database. Closes ticket 26674.
9294 o Minor features (Rust, portability):
9295 - Rust cross-compilation is now supported. Closes ticket 25895.
9297 o Minor bugfixes (compilation):
9298 - Update build system so that tor builds again with --disable-unittests
9299 after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
9300 - Fix a compilation warning on some versions of GCC when building
9301 code that calls routerinfo_get_my_routerinfo() twice, assuming
9302 that the second call will succeed if the first one did. Fixes bug
9303 26269; bugfix on 0.2.8.2-alpha.
9305 o Minor bugfixes (controller):
9306 - Report the port correctly when a port is configured to bind to
9307 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
9308 - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
9309 Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
9310 on 0.3.3.1-alpha. Patch by "akwizgran".
9312 o Minor bugfixes (correctness, flow control):
9313 - Upon receiving a stream-level SENDME cell, verify that our window
9314 has not grown too large. Fixes bug 26214; bugfix on svn
9317 o Minor bugfixes (memory, correctness):
9318 - Fix a number of small memory leaks identified by coverity. Fixes
9319 bug 26467; bugfix on numerous Tor versions.
9321 o Minor bugfixes (logging):
9322 - Improve the log message when connection initiators fail to
9323 authenticate direct connections to relays. Fixes bug 26927; bugfix
9326 o Minor bugfixes (portability):
9327 - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
9328 26994; bugfix on 0.3.4.1-alpha.
9329 - Work around two different bugs in the OS X 10.10 and later SDKs
9330 that would prevent us from successfully targeting earlier versions
9331 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
9333 o Minor bugfixes (single onion services, Tor2web):
9334 - Log a protocol warning when single onion services or Tor2web
9335 clients fail to authenticate direct connections to relays. Fixes
9336 bug 26924; bugfix on 0.2.9.1-alpha.
9338 o Minor bugfixes (testing):
9339 - Disable core dumps in test_bt.sh, to avoid failures in "make
9340 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9342 o Minor bugfixes (testing, compatibility):
9343 - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
9344 only to pass strings (rather than "bytes" objects) to the Python
9345 subprocess module. Python 3 on Windows seems to require this.
9346 Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
9347 0.3.1.1-alpha (for hs_ntor_ref.py).
9349 o Minor bugfixes (v3 onion services):
9350 - Stop sending ed25519 link specifiers in v3 onion service introduce
9351 cells and descriptors, when the rendezvous or introduction point
9352 doesn't support ed25519 link authentication. Fixes bug 26627;
9353 bugfix on 0.3.2.4-alpha.
9356 Changes in version 0.3.4.5-rc - 2018-07-13
9357 Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
9358 bridge relays should upgrade.
9360 o Directory authority changes:
9361 - The "Bifroest" bridge authority has been retired; the new bridge
9362 authority is "Serge", and it is operated by George from the
9363 TorBSD project. Closes ticket 26771.
9366 Changes in version 0.3.3.9 - 2018-07-13
9367 Tor 0.3.3.9 moves to a new bridge authority, meaning people running
9368 bridge relays should upgrade.
9370 o Directory authority changes:
9371 - The "Bifroest" bridge authority has been retired; the new bridge
9372 authority is "Serge", and it is operated by George from the
9373 TorBSD project. Closes ticket 26771.
9376 Changes in version 0.3.2.11 - 2018-07-13
9377 Tor 0.3.2.11 moves to a new bridge authority, meaning people running
9378 bridge relays should upgrade. We also take this opportunity to backport
9381 o Directory authority changes:
9382 - The "Bifroest" bridge authority has been retired; the new bridge
9383 authority is "Serge", and it is operated by George from the
9384 TorBSD project. Closes ticket 26771.
9386 o Directory authority changes (backport from 0.3.3.7):
9387 - Add an IPv6 address for the "dannenberg" directory authority.
9388 Closes ticket 26343.
9390 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
9391 - When directory authorities read a zero-byte bandwidth file, they
9392 would previously log a warning with the contents of an
9393 uninitialised buffer. They now log a warning about the empty file
9394 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
9396 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
9397 - Correctly detect when onion services get disabled after HUP. Fixes
9398 bug 25761; bugfix on 0.3.2.1.
9400 o Minor features (sandbox, backport from 0.3.3.4-alpha):
9401 - Explicitly permit the poll() system call when the Linux
9402 seccomp2-based sandbox is enabled: apparently, some versions of
9403 libc use poll() when calling getpwnam(). Closes ticket 25313.
9405 o Minor feature (continuous integration, backport from 0.3.3.5-rc):
9406 - Update the Travis CI configuration to use the stable Rust channel,
9407 now that we have decided to require that. Closes ticket 25714.
9409 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
9410 - Our .travis.yml configuration now includes support for testing the
9411 results of "make distcheck". (It's not uncommon for "make check"
9412 to pass but "make distcheck" to fail.) Closes ticket 25814.
9413 - Our Travis CI configuration now integrates with the Coveralls
9414 coverage analysis tool. Closes ticket 25818.
9416 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
9417 - Add several checks to detect whether Tor relays are uploading
9418 their descriptors without specifying why they regenerated them.
9419 Diagnostic for ticket 25686.
9421 o Minor features (compilation, backport from 0.3.4.4-rc):
9422 - When building Tor, prefer to use Python 3 over Python 2, and more
9423 recent (contemplated) versions over older ones. Closes
9426 o Minor features (geoip):
9427 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
9428 Country database. Closes ticket 26674.
9430 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
9431 - Upon receiving a malformed connected cell, stop processing the
9432 cell immediately. Previously we would mark the connection for
9433 close, but continue processing the cell as if the connection were
9434 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
9436 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
9437 - Allow the nanosleep() system call, which glibc uses to implement
9438 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
9440 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
9441 - When running the hs_ntor_ref.py test, make sure only to pass
9442 strings (rather than "bytes" objects) to the Python subprocess
9443 module. Python 3 on Windows seems to require this. Fixes bug
9444 26535; bugfix on 0.3.1.1-alpha.
9445 - When running the ntor_ref.py test, make sure only to pass strings
9446 (rather than "bytes" objects) to the Python subprocess module.
9447 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
9450 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
9451 - Work around a change in OpenSSL 1.1.1 where return values that
9452 would previously indicate "no password" now indicate an empty
9453 password. Without this workaround, Tor instances running with
9454 OpenSSL 1.1.1 would accept descriptors that other Tor instances
9455 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
9457 o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
9458 - Document that the PerConnBW{Rate,Burst} options will fall back to
9459 their corresponding consensus parameters only if those parameters
9460 are set. Previously we had claimed that these values would always
9461 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
9463 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
9464 - Fix a compilation warning on some versions of GCC when building
9465 code that calls routerinfo_get_my_routerinfo() twice, assuming
9466 that the second call will succeed if the first one did. Fixes bug
9467 26269; bugfix on 0.2.8.2-alpha.
9469 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
9470 - Don't consider Tor running as a client if the ControlPort is open,
9471 but no actual client ports are open. Fixes bug 26062; bugfix
9474 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
9475 - Prevent a possible out-of-bounds smartlist read in
9476 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
9478 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
9479 - Fix a very unlikely (impossible, we believe) null pointer
9480 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
9481 Coverity; this is CID 1430932.
9483 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
9484 - Fix a memory leak when a v3 onion service is configured and gets a
9485 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
9486 - When parsing the descriptor signature, look for the token plus an
9487 extra white-space at the end. This is more correct but also will
9488 allow us to support new fields that might start with "signature".
9489 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
9491 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
9492 - Relays now correctly block attempts to re-extend to the previous
9493 relay by Ed25519 identity. Previously they would warn in this
9494 case, but not actually reject the attempt. Fixes bug 26158; bugfix
9497 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
9498 - Avoid a crash when running with DirPort set but ORPort turned off.
9499 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
9501 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
9502 - Silence unused-const-variable warnings in zstd.h with some GCC
9503 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
9505 o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
9506 - Avoid intermittent test failures due to a test that had relied on
9507 onion service introduction point creation finishing within 5
9508 seconds of real clock time. Fixes bug 25450; bugfix
9511 o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
9512 - Fix a C99 compliance issue in our configuration script that caused
9513 compilation issues when compiling Tor with certain versions of
9514 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
9516 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
9517 - Fix a number of small memory leaks identified by coverity. Fixes
9518 bug 26467; bugfix on numerous Tor versions.
9520 o Code simplification and refactoring (backport from 0.3.3.5-rc):
9521 - Move the list of default directory authorities to its own file.
9522 Closes ticket 24854. Patch by "beastr0".
9525 Changes in version 0.2.9.16 - 2018-07-13
9526 Tor 0.2.9.16 moves to a new bridge authority, meaning people running
9527 bridge relays should upgrade. We also take this opportunity to backport
9530 o Directory authority changes:
9531 - The "Bifroest" bridge authority has been retired; the new bridge
9532 authority is "Serge", and it is operated by George from the
9533 TorBSD project. Closes ticket 26771.
9535 o Directory authority changes (backport from 0.3.3.7):
9536 - Add an IPv6 address for the "dannenberg" directory authority.
9537 Closes ticket 26343.
9539 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
9540 - When directory authorities read a zero-byte bandwidth file, they
9541 would previously log a warning with the contents of an
9542 uninitialised buffer. They now log a warning about the empty file
9543 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
9545 o Minor features (sandbox, backport from 0.3.3.4-alpha):
9546 - Explicitly permit the poll() system call when the Linux
9547 seccomp2-based sandbox is enabled: apparently, some versions of
9548 libc use poll() when calling getpwnam(). Closes ticket 25313.
9550 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
9551 - Our .travis.yml configuration now includes support for testing the
9552 results of "make distcheck". (It's not uncommon for "make check"
9553 to pass but "make distcheck" to fail.) Closes ticket 25814.
9554 - Our Travis CI configuration now integrates with the Coveralls
9555 coverage analysis tool. Closes ticket 25818.
9557 o Minor features (compilation, backport from 0.3.4.4-rc):
9558 - When building Tor, prefer to use Python 3 over Python 2, and more
9559 recent (contemplated) versions over older ones. Closes
9562 o Minor features (geoip):
9563 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
9564 Country database. Closes ticket 26674.
9566 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
9567 - Upon receiving a malformed connected cell, stop processing the
9568 cell immediately. Previously we would mark the connection for
9569 close, but continue processing the cell as if the connection were
9570 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
9572 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
9573 - Allow the nanosleep() system call, which glibc uses to implement
9574 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
9576 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
9577 - When running the ntor_ref.py test, make sure only to pass strings
9578 (rather than "bytes" objects) to the Python subprocess module.
9579 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
9582 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
9583 - Work around a change in OpenSSL 1.1.1 where return values that
9584 would previously indicate "no password" now indicate an empty
9585 password. Without this workaround, Tor instances running with
9586 OpenSSL 1.1.1 would accept descriptors that other Tor instances
9587 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
9589 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
9590 - Fix a compilation warning on some versions of GCC when building
9591 code that calls routerinfo_get_my_routerinfo() twice, assuming
9592 that the second call will succeed if the first one did. Fixes bug
9593 26269; bugfix on 0.2.8.2-alpha.
9595 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
9596 - Don't consider Tor running as a client if the ControlPort is open,
9597 but no actual client ports are open. Fixes bug 26062; bugfix
9600 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
9601 - Prevent a possible out-of-bounds smartlist read in
9602 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
9604 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
9605 - Fix a very unlikely (impossible, we believe) null pointer
9606 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
9607 Coverity; this is CID 1430932.
9609 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
9610 - Fix a number of small memory leaks identified by coverity. Fixes
9611 bug 26467; bugfix on numerous Tor versions.
9613 o Code simplification and refactoring (backport from 0.3.3.5-rc):
9614 - Move the list of default directory authorities to its own file.
9615 Closes ticket 24854. Patch by "beastr0".
9618 Changes in version 0.3.4.4-rc - 2018-07-09
9619 Tor 0.3.4.4-rc fixes several small compilation, portability, and
9620 correctness issues in previous versions of Tor. This version is a
9621 release candidate: if no serious bugs are found, we expect that the
9622 stable 0.3.4 release will be (almost) the same as this release.
9624 o Minor features (compilation):
9625 - When building Tor, prefer to use Python 3 over Python 2, and more
9626 recent (contemplated) versions over older ones. Closes
9629 o Minor features (geoip):
9630 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
9631 Country database. Closes ticket 26674.
9633 o Minor features (Rust, portability):
9634 - Rust cross-compilation is now supported. Closes ticket 25895.
9636 o Minor bugfixes (compilation):
9637 - Fix a compilation warning on some versions of GCC when building
9638 code that calls routerinfo_get_my_routerinfo() twice, assuming
9639 that the second call will succeed if the first one did. Fixes bug
9640 26269; bugfix on 0.2.8.2-alpha.
9642 o Minor bugfixes (control port):
9643 - Report the port correctly when a port is configured to bind to
9644 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
9645 - Handle the HSADDRESS= argument to the HSPOST command properly.
9646 (Previously, this argument was misparsed and thus ignored.) Fixes
9647 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
9649 o Minor bugfixes (correctness, flow control):
9650 - Upon receiving a stream-level SENDME cell, verify that our window
9651 has not grown too large. Fixes bug 26214; bugfix on svn
9654 o Minor bugfixes (memory, correctness):
9655 - Fix a number of small memory leaks identified by coverity. Fixes
9656 bug 26467; bugfix on numerous Tor versions.
9658 o Minor bugfixes (testing, compatibility):
9659 - When running the hs_ntor_ref.py test, make sure only to pass
9660 strings (rather than "bytes" objects) to the Python subprocess
9661 module. Python 3 on Windows seems to require this. Fixes bug
9662 26535; bugfix on 0.3.1.1-alpha.
9663 - When running the ntor_ref.py test, make sure only to pass strings
9664 (rather than "bytes" objects) to the Python subprocess module.
9665 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
9669 Changes in version 0.3.3.8 - 2018-07-09
9670 Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
9671 fixes for a memory leak affecting directory authorities.
9673 o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
9674 - Stop leaking memory on directory authorities when planning to
9675 vote. This bug was crashing authorities by exhausting their
9676 memory. Fixes bug 26435; bugfix on 0.3.3.6.
9678 o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
9679 - Make sure that failing tests in Rust will actually cause the build
9680 to fail: previously, they were ignored. Fixes bug 26258; bugfix
9683 o Minor features (compilation, backport from 0.3.4.4-rc):
9684 - When building Tor, prefer to use Python 3 over Python 2, and more
9685 recent (contemplated) versions over older ones. Closes
9688 o Minor features (geoip):
9689 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
9690 Country database. Closes ticket 26674.
9692 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
9693 - Add several checks to detect whether Tor relays are uploading
9694 their descriptors without specifying why they regenerated them.
9695 Diagnostic for ticket 25686.
9697 o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
9698 - Don't count path selection failures as circuit build failures.
9699 This change should eliminate cases where Tor blames its guard or
9700 the network for situations like insufficient microdescriptors
9701 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
9704 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
9705 - Fix a compilation warning on some versions of GCC when building
9706 code that calls routerinfo_get_my_routerinfo() twice, assuming
9707 that the second call will succeed if the first one did. Fixes bug
9708 26269; bugfix on 0.2.8.2-alpha.
9710 o Minor bugfixes (control port, backport from 0.3.4.4-rc):
9711 - Handle the HSADDRESS= argument to the HSPOST command properly.
9712 (Previously, this argument was misparsed and thus ignored.) Fixes
9713 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
9715 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
9716 - Fix a number of small memory leaks identified by coverity. Fixes
9717 bug 26467; bugfix on numerous Tor versions.
9719 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
9720 - Relays now correctly block attempts to re-extend to the previous
9721 relay by Ed25519 identity. Previously they would warn in this
9722 case, but not actually reject the attempt. Fixes bug 26158; bugfix
9725 o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
9726 - When shutting down, Tor now clears all the flags in the control.c
9727 module. This should prevent a bug where authentication cookies are
9728 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
9730 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
9731 - When running the hs_ntor_ref.py test, make sure only to pass
9732 strings (rather than "bytes" objects) to the Python subprocess
9733 module. Python 3 on Windows seems to require this. Fixes bug
9734 26535; bugfix on 0.3.1.1-alpha.
9735 - When running the ntor_ref.py test, make sure only to pass strings
9736 (rather than "bytes" objects) to the Python subprocess module.
9737 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
9741 Changes in version 0.3.4.3-alpha - 2018-06-26
9742 Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
9743 one that was causing stability issues on directory authorities.
9745 o Major bugfixes (directory authority):
9746 - Stop leaking memory on directory authorities when planning to
9747 vote. This bug was crashing authorities by exhausting their
9748 memory. Fixes bug 26435; bugfix on 0.3.3.6.
9750 o Major bugfixes (rust, testing):
9751 - Make sure that failing tests in Rust will actually cause the build
9752 to fail: previously, they were ignored. Fixes bug 26258; bugfix
9755 o Minor feature (directory authorities):
9756 - Stop warning about incomplete bw lines before the first complete
9757 bw line has been found, so that additional header lines can be
9758 ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
9760 o Minor features (relay, diagnostic):
9761 - Add several checks to detect whether Tor relays are uploading
9762 their descriptors without specifying why they regenerated them.
9763 Diagnostic for ticket 25686.
9765 o Minor features (unit tests):
9766 - Test complete bandwidth measurements files, and test that
9767 incomplete bandwidth lines only give warnings when the end of the
9768 header has not been detected. Fixes bug 25947; bugfix
9771 o Minor bugfixes (compilation):
9772 - Refrain from compiling unit testing related object files when
9773 --disable-unittests is set to configure script. Fixes bug 24891;
9774 bugfix on 0.2.5.1-alpha.
9775 - When linking the libtor_testing.a library, only include the
9776 dirauth object files once. Previously, they were getting added
9777 twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
9778 - The --enable-fatal-warnings flag now affects Rust code as well.
9779 Closes ticket 26245.
9781 o Minor bugfixes (onion services):
9782 - Recompute some consensus information after detecting a clock jump,
9783 or after transitioning from a non-live consensus to a live
9784 consensus. We do this to avoid having an outdated state, and
9785 miscalculating the index for next-generation onion services. Fixes
9786 bug 24977; bugfix on 0.3.2.1-alpha.
9788 o Minor bugfixes (relay):
9789 - Relays now correctly block attempts to re-extend to the previous
9790 relay by Ed25519 identity. Previously they would warn in this
9791 case, but not actually reject the attempt. Fixes bug 26158; bugfix
9794 o Minor bugfixes (testing):
9795 - Fix compilation of the doctests in the Rust crypto crate. Fixes
9796 bug 26415; bugfix on 0.3.4.1-alpha.
9797 - Instead of trying to read the geoip configuration files from
9798 within the unit tests, instead create our own ersatz files with
9799 just enough geoip data in the format we expect. Trying to read
9800 from the source directory created problems on Windows with mingw,
9801 where the build system's paths are not the same as the platform's
9802 paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
9803 - Refrain from trying to get an item from an empty smartlist in
9804 test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
9805 to catch improper smartlist usage. Furthermore, enable
9806 DEBUG_SMARTLIST globally when build is configured with fragile
9807 hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
9810 Changes in version 0.3.3.7 - 2018-06-12
9811 Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
9812 fixes for bugs affecting compatibility and stability.
9814 o Directory authority changes:
9815 - Add an IPv6 address for the "dannenberg" directory authority.
9816 Closes ticket 26343.
9818 o Minor features (geoip):
9819 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
9820 Country database. Closes ticket 26351.
9822 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
9823 - Work around a change in OpenSSL 1.1.1 where return values that
9824 would previously indicate "no password" now indicate an empty
9825 password. Without this workaround, Tor instances running with
9826 OpenSSL 1.1.1 would accept descriptors that other Tor instances
9827 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
9829 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
9830 - Silence unused-const-variable warnings in zstd.h with some GCC
9831 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
9833 o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
9834 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
9835 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
9836 miscounting the total number of circuits for these field values.)
9837 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
9839 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
9840 - Prevent a possible out-of-bounds smartlist read in
9841 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
9843 o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
9844 - Only select relays when they have the descriptors we prefer to use
9845 for them. This change fixes a bug where we could select a relay
9846 because it had _some_ descriptor, but reject it later with a
9847 nonfatal assertion error because it didn't have the exact one we
9848 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
9851 Changes in version 0.3.4.2-alpha - 2018-06-12
9852 Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
9853 release, and forward-ports an authority-only security fix from 0.3.3.6.
9855 o Directory authority changes:
9856 - Add an IPv6 address for the "dannenberg" directory authority.
9857 Closes ticket 26343.
9859 o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
9860 - Fix a bug that could have allowed an attacker to force a directory
9861 authority to use up all its RAM by passing it a maliciously
9862 crafted protocol versions string. Fixes bug 25517; bugfix on
9863 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
9865 o Minor features (continuous integration):
9866 - Add the necessary configuration files for continuous integration
9867 testing on Windows, via the Appveyor platform. Closes ticket
9868 25549. Patches from Marcin Cieślak and Isis Lovecruft.
9870 o Minor features (geoip):
9871 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
9872 Country database. Closes ticket 26351.
9874 o Minor bugfixes (compatibility, openssl):
9875 - Work around a change in OpenSSL 1.1.1 where return values that
9876 would previously indicate "no password" now indicate an empty
9877 password. Without this workaround, Tor instances running with
9878 OpenSSL 1.1.1 would accept descriptors that other Tor instances
9879 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
9881 o Minor bugfixes (compilation):
9882 - Silence unused-const-variable warnings in zstd.h with some GCC
9883 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
9884 - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
9885 flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
9886 - Avoid a compiler warning when casting the return value of
9887 smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
9888 26283; bugfix on 0.2.4.10-alpha.
9890 o Minor bugfixes (control port):
9891 - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
9892 CIRC_BW events. Previously, such cells were counted entirely in
9893 the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
9896 o Minor bugfixes (controller):
9897 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
9898 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
9899 miscounting the total number of circuits for these field values.)
9900 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
9902 o Minor bugfixes (hardening):
9903 - Prevent a possible out-of-bounds smartlist read in
9904 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
9906 o Minor bugfixes (onion services):
9907 - Fix a bug that blocked the creation of ephemeral v3 onion
9908 services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
9910 o Minor bugfixes (test coverage tools):
9911 - Update our "cov-diff" script to handle output from the latest
9912 version of gcov, and to remove extraneous timestamp information
9913 from its output. Fixes bugs 26101 and 26102; bugfix
9917 Changes in version 0.3.3.6 - 2018-05-22
9918 Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
9919 backports several important fixes from the 0.3.4.1-alpha.
9921 The Tor 0.3.3 series includes controller support and other
9922 improvements for v3 onion services, official support for embedding Tor
9923 within other applications, and our first non-trivial module written in
9924 the Rust programming language. (Rust is still not enabled by default
9925 when building Tor.) And as usual, there are numerous other smaller
9926 bugfixes, features, and improvements.
9928 Below are the changes since 0.3.3.5-rc. For a list of all changes
9929 since 0.3.2.10, see the ReleaseNotes file.
9931 o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
9932 - When directory authorities read a zero-byte bandwidth file, they
9933 would previously log a warning with the contents of an
9934 uninitialised buffer. They now log a warning about the empty file
9935 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
9937 o Major bugfixes (security, directory authority, denial-of-service):
9938 - Fix a bug that could have allowed an attacker to force a directory
9939 authority to use up all its RAM by passing it a maliciously
9940 crafted protocol versions string. Fixes bug 25517; bugfix on
9941 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
9943 o Major bugfixes (crash, backport from 0.3.4.1-alpha):
9944 - Avoid a rare assertion failure in the circuit build timeout code
9945 if we fail to allow any circuits to actually complete. Fixes bug
9946 25733; bugfix on 0.2.2.2-alpha.
9948 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
9949 - Avoid a crash when testing router reachability on a router that
9950 could have an ed25519 ID, but which does not. Fixes bug 25415;
9951 bugfix on 0.3.3.2-alpha.
9953 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
9954 - Correctly detect when onion services get disabled after HUP. Fixes
9955 bug 25761; bugfix on 0.3.2.1.
9957 o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
9958 - Impose a limit on circuit cell queue size. The limit can be
9959 controlled by a consensus parameter. Fixes bug 25226; bugfix
9962 o Minor features (compatibility, backport from 0.3.4.1-alpha):
9963 - Avoid some compilation warnings with recent versions of LibreSSL.
9964 Closes ticket 26006.
9966 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
9967 - Our .travis.yml configuration now includes support for testing the
9968 results of "make distcheck". (It's not uncommon for "make check"
9969 to pass but "make distcheck" to fail.) Closes ticket 25814.
9970 - Our Travis CI configuration now integrates with the Coveralls
9971 coverage analysis tool. Closes ticket 25818.
9973 o Minor features (geoip):
9974 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
9975 database. Closes ticket 26104.
9977 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
9978 - Don't consider Tor running as a client if the ControlPort is open,
9979 but no actual client ports are open. Fixes bug 26062; bugfix
9982 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
9983 - Upon receiving a malformed connected cell, stop processing the
9984 cell immediately. Previously we would mark the connection for
9985 close, but continue processing the cell as if the connection were
9986 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
9988 o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
9989 - Stop saying in the manual that clients cache ipv4 dns answers from
9990 exit relays. We haven't used them since 0.2.6.3-alpha, and in
9991 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
9992 we forgot to say so in the man page. Fixes bug 26052; bugfix
9995 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
9996 - Allow the nanosleep() system call, which glibc uses to implement
9997 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
9999 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
10000 - Fix a memory leak when a v3 onion service is configured and gets a
10001 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
10002 - When parsing the descriptor signature, look for the token plus an
10003 extra white-space at the end. This is more correct but also will
10004 allow us to support new fields that might start with "signature".
10005 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
10007 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
10008 - Avoid a crash when running with DirPort set but ORPort turned off.
10009 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
10011 o Documentation (backport from 0.3.4.1-alpha):
10012 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
10013 ticket 25857. Patch from "CTassisF".
10016 Changes in version 0.3.4.1-alpha - 2018-05-17
10017 Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
10018 includes refactoring to begin reducing Tor's binary size and idle CPU
10019 usage on mobile, along with prep work for new bandwidth scanners,
10020 improvements to the experimental "vanguards" feature, and numerous
10021 other small features and bugfixes.
10023 o New system requirements:
10024 - Tor no longer tries to support old operating systems without
10025 mmap() or some local equivalent. Apparently, compilation on such
10026 systems has been broken for some time, without anybody noticing or
10027 complaining. Closes ticket 25398.
10029 o Major feature (directory authority, modularization):
10030 - The directory authority subsystem has been modularized. The code
10031 is now located in src/or/dirauth/, and is compiled in by default.
10032 To disable the module, the configure option
10033 --disable-module-dirauth has been added. This module may be
10034 disabled by default in some future release. Closes ticket 25610.
10036 o Major features (main loop, CPU usage):
10037 - When Tor is disabled (via DisableNetwork or via hibernation), it
10038 no longer needs to run any per-second events. This change should
10039 make it easier for mobile applications to disable Tor while the
10040 device is sleeping, or Tor is not running. Closes ticket 26063.
10041 - Tor no longer enables all of its periodic events by default.
10042 Previously, Tor would enable all possible main loop events,
10043 regardless of whether it needed them. Furthermore, many of these
10044 events are now disabled with Tor is hibernating or DisableNetwork
10045 is set. This is a big step towards reducing client CPU usage by
10046 reducing the amount of wake-ups the daemon does. Closes ticket
10048 - The bandwidth-limitation logic has been refactored so that
10049 bandwidth calculations are performed on-demand, rather than every
10050 TokenBucketRefillInterval milliseconds. This change should improve
10051 the granularity of our bandwidth calculations, and limit the
10052 number of times that the Tor process needs to wake up when it is
10053 idle. Closes ticket 25373.
10054 - Move responsibility for many operations from a once-per-second
10055 callback to a callback that is only scheduled as needed. Moving
10056 this functionality has allowed us to disable the callback when
10057 Tor's network is disabled. Once enough items are removed from our
10058 once-per-second callback, we can eliminate it entirely to conserve
10059 CPU when idle. The functionality removed includes: closing
10060 connections, circuits, and channels (ticket 25932); consensus
10061 voting (25937); flushing log callbacks (25951); honoring delayed
10062 SIGNEWNYM requests (25949); rescanning the consensus cache
10063 (25931); saving the state file to disk (25948); warning relay
10064 operators about unreachable ports (25952); and keeping track of
10065 Tor's uptime (26009).
10067 o Major bugfixes (directory authorities, security):
10068 - When directory authorities read a zero-byte bandwidth file, they
10069 would previously log a warning with the contents of an
10070 uninitialised buffer. They now log a warning about the empty file
10071 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10073 o Major bugfixes (crash):
10074 - Avoid a rare assertion failure in the circuit build timeout code
10075 if we fail to allow any circuits to actually complete. Fixes bug
10076 25733; bugfix on 0.2.2.2-alpha.
10078 o Major bugfixes (directory authority):
10079 - Avoid a crash when testing router reachability on a router that
10080 could have an ed25519 ID, but which does not. Fixes bug 25415;
10081 bugfix on 0.3.3.2-alpha.
10083 o Major bugfixes (onion service):
10084 - Correctly detect when onion services get disabled after HUP. Fixes
10085 bug 25761; bugfix on 0.3.2.1.
10087 o Major bugfixes (protover, voting):
10088 - Revise Rust implementation of protover to use a more memory-
10089 efficient voting algorithm and corresponding data structures, thus
10090 avoiding a potential (but small impact) DoS attack where specially
10091 crafted protocol strings would expand to several potential
10092 megabytes in memory. In the process, several portions of code were
10093 revised to be methods on new, custom types, rather than functions
10094 taking interchangeable types, thus increasing type safety of the
10095 module. Custom error types and handling were added as well, in
10096 order to facilitate better error dismissal/handling in outside
10097 crates and avoid mistakenly passing an internal error string to C
10098 over the FFI boundary. Many tests were added, and some previous
10099 differences between the C and Rust implementations have been
10100 remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
10102 o Major bugfixes (relay, denial of service):
10103 - Impose a limit on circuit cell queue size. The limit can be
10104 controlled by a consensus parameter. Fixes bug 25226; bugfix
10107 o Minor features (accounting):
10108 - When Tor becomes dormant, it now uses a scheduled event to wake up
10109 at the right time. Previously, we would use the per-second timer
10110 to check whether to wake up, but we no longer have any per-second
10111 timers enabled when the network is disabled. Closes ticket 26064.
10113 o Minor features (code quality):
10114 - Add optional spell-checking for the Tor codebase, using the
10115 "misspell" program. To use this feature, run "make check-typos".
10116 Closes ticket 25024.
10118 o Minor features (compatibility):
10119 - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
10120 the no-deprecated option, and builds correctly with them. Closes
10121 tickets 19429, 19981, and 25353.
10122 - Avoid some compilation warnings with recent versions of LibreSSL.
10123 Closes ticket 26006.
10125 o Minor features (compression, zstd):
10126 - When running with zstd, Tor now considers using advanced functions
10127 that the zstd maintainers have labeled as potentially unstable. To
10128 prevent breakage, Tor will only use this functionality when the
10129 runtime version of the zstd library matches the version with which
10130 Tor was compiled. Closes ticket 25162.
10132 o Minor features (configuration):
10133 - The "DownloadSchedule" options have been renamed to end with
10134 "DownloadInitialDelay". The old names are still allowed, but will
10135 produce a warning. Comma-separated lists are still permitted for
10136 these options, but all values after the first are ignored (as they
10137 have been since 0.2.9). Closes ticket 23354.
10139 o Minor features (continuous integration):
10140 - Our .travis.yml configuration now includes support for testing the
10141 results of "make distcheck". (It's not uncommon for "make check"
10142 to pass but "make distcheck" to fail.) Closes ticket 25814.
10143 - Our Travis CI configuration now integrates with the Coveralls
10144 coverage analysis tool. Closes ticket 25818.
10146 o Minor features (control port):
10147 - Introduce GETINFO "current-time/{local,utc}" to return the local
10148 and UTC times respectively in ISO format. This helps a controller
10149 like Tor Browser detect a time-related error. Closes ticket 25511.
10150 Patch by Neel Chauhan.
10151 - Introduce new fields to the CIRC_BW event. There are two new
10152 fields in each of the read and written directions. The DELIVERED
10153 fields report the total valid data on the circuit, as measured by
10154 the payload sizes of verified and error-checked relay command
10155 cells. The OVERHEAD fields report the total unused bytes in each
10156 of these cells. Closes ticket 25903.
10158 o Minor features (directory authority):
10159 - Directory authorities now open their key-pinning files as O_SYNC,
10160 to limit their chances of accidentally writing partial lines.
10161 Closes ticket 23909.
10163 o Minor features (directory authority, forward compatibility):
10164 - Make the lines of the measured bandwidth file able to contain
10165 their entries in any order. Previously, the node_id entry needed
10166 to come first. Closes ticket 26004.
10168 o Minor features (entry guards):
10169 - Introduce a new torrc option NumPrimaryGuards for controlling the
10170 number of primary guards. Closes ticket 25843.
10172 o Minor features (geoip):
10173 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
10174 database. Closes ticket 26104.
10176 o Minor features (performance):
10177 - Avoid a needless call to malloc() when processing an incoming
10178 relay cell. Closes ticket 24914.
10179 - Make our timing-wheel code run a tiny bit faster on 32-bit
10180 platforms, by preferring 32-bit math to 64-bit. Closes
10182 - Avoid a needless malloc()/free() pair every time we handle an ntor
10183 handshake. Closes ticket 25150.
10185 o Minor features (testing):
10186 - Add a unit test for voting_schedule_get_start_of_next_interval().
10187 Closes ticket 26014, and helps make unit test coverage
10188 more deterministic.
10189 - A new unittests module specifically for testing the functions in
10190 the (new-ish) bridges.c module has been created with new
10191 unittests, raising the code coverage percentages. Closes 25425.
10192 - We now have improved testing for addressmap_get_virtual_address()
10193 function. This should improve our test coverage, and make our test
10194 coverage more deterministic. Closes ticket 25993.
10196 o Minor features (timekeeping, circuit scheduling):
10197 - When keeping track of how busy each circuit have been recently on
10198 a given connection, use coarse-grained monotonic timers rather
10199 than gettimeofday(). This change should marginally increase
10200 accuracy and performance. Implements part of ticket 25927.
10202 o Minor bugfixes (bandwidth management):
10203 - Consider ourselves "low on write bandwidth" if we have exhausted
10204 our write bandwidth some time in the last second. This was the
10205 documented behavior before, but the actual behavior was to change
10206 this value every TokenBucketRefillInterval. Fixes bug 25828;
10207 bugfix on 0.2.3.5-alpha.
10209 o Minor bugfixes (C correctness):
10210 - Add a missing lock acquisition in the shutdown code of the control
10211 subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
10212 Coverity; this is CID 1433643.
10214 o Minor bugfixes (circuit path selection):
10215 - Don't count path selection failures as circuit build failures.
10216 This change should eliminate cases where Tor blames its guard or
10217 the network for situations like insufficient microdescriptors
10218 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
10221 o Minor bugfixes (client):
10222 - Don't consider Tor running as a client if the ControlPort is open,
10223 but no actual client ports are open. Fixes bug 26062; bugfix
10226 o Minor bugfixes (code style):
10227 - Fixed multiple includes of transports.h in src/or/connection.c
10228 Fixes bug 25261; bugfix on 0.2.5.1-alpha.
10229 - Remove the unused variable n_possible from the function
10230 channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
10232 o Minor bugfixes (control interface):
10233 - Respond with more human-readable error messages to GETINFO exit-
10234 policy/* requests. Also, let controller know if an error is
10235 transient (response code 551) or not (response code 552). Fixes
10236 bug 25852; bugfix on 0.2.8.1-alpha.
10238 o Minor bugfixes (controller):
10239 - Make CIRC_BW event reflect the total of all data sent on a
10240 circuit, including padding and dropped cells. Also fix a mis-
10241 counting bug when STREAM_BW events were enabled. Fixes bug 25400;
10242 bugfix on 0.2.5.2-alpha.
10244 o Minor bugfixes (correctness, client):
10245 - Upon receiving a malformed connected cell, stop processing the cell
10246 immediately. Previously we would mark the connection for close, but
10247 continue processing the cell as if the connection were open. Fixes bug
10248 26072; bugfix on 0.2.4.7-alpha.
10250 o Minor bugfixes (directory client):
10251 - When unverified-consensus is verified, rename it to cached-
10252 consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
10253 - Fixed launching a certificate fetch always during the scheduled
10254 periodic consensus fetch by fetching only in those cases when
10255 consensus are waiting for certs. Fixes bug 24740; bugfix
10258 o Minor bugfixes (documentation):
10259 - Stop saying in the manual that clients cache ipv4 dns answers from
10260 exit relays. We haven't used them since 0.2.6.3-alpha, and in
10261 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
10262 we forgot to say so in the man page. Fixes bug 26052; bugfix
10265 o Minor bugfixes (error reporting):
10266 - Improve tolerance for directory authorities with skewed clocks.
10267 Previously, an authority with a clock more than 60 seconds ahead
10268 could cause a client with a correct clock to warn that the
10269 client's clock was behind. Now the clocks of a majority of
10270 directory authorities have to be ahead of the client before this
10271 warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
10273 o Minor bugfixes (Linux seccomp2 sandbox):
10274 - Allow the nanosleep() system call, which glibc uses to implement
10275 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10277 o Minor bugfixes (onion service):
10278 - Fix a memory leak when a v3 onion service is configured and gets a
10279 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
10280 - When parsing the descriptor signature, look for the token plus an
10281 extra white-space at the end. This is more correct but also will
10282 allow us to support new fields that might start with "signature".
10283 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
10285 o Minor bugfixes (path selection):
10286 - Only select relays when they have the descriptors we prefer to use
10287 for them. This change fixes a bug where we could select a relay
10288 because it had _some_ descriptor, but reject it later with a
10289 nonfatal assertion error because it didn't have the exact one we
10290 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
10292 o Minor bugfixes (portability):
10293 - Do not align mmap length, as it is not required by POSIX, and the
10294 getpagesize function is deprecated. Fixes bug 25399; bugfix
10297 o Minor bugfixes (portability, FreeBSD):
10298 - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
10299 does not stringify on FreeBSD, so we switch to tor_asprintf().
10300 Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
10302 o Minor bugfixes (relay statistics):
10303 - When a relay is collecting internal statistics about how many
10304 create cell requests it has seen of each type, accurately count
10305 the requests from relays that temporarily fall out of the
10306 consensus. (To be extra conservative, we were already ignoring
10307 requests from clients in our counts, and we continue ignoring them
10308 here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
10310 o Minor bugfixes (relay, crash):
10311 - Avoid a crash when running with DirPort set but ORPort turned off.
10312 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
10314 o Minor bugfixes (restart-in-process):
10315 - When shutting down, Tor now clears all the flags in the control.c
10316 module. This should prevent a bug where authentication cookies are
10317 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
10319 o Minor bugfixes (testing):
10320 - When testing workqueue event-cancellation, make sure that we
10321 actually cancel an event, and that cancel each event with equal
10322 probability. (It was previously possible, though extremely
10323 unlikely, for our event-canceling test not to cancel any events.)
10324 Fixes bug 26008; bugfix on 0.2.6.3-alpha.
10325 - Repeat part of the test in test_client_pick_intro() a number of
10326 times, to give it consistent coverage. Fixes bug 25996; bugfix
10328 - Remove randomness from the hs_common/responsible_hsdirs test, so
10329 that it always takes the same path through the function it tests.
10330 Fixes bug 25997; bugfix on 0.3.2.1-alpha.
10331 - Change the behavior of the "channel/outbound" test so that it
10332 never causes a 10-second rollover for the EWMA circuitmux code.
10333 Previously, this behavior would happen randomly, and result in
10334 fluctuating test coverage. Fixes bug 25994; bugfix
10336 - Use X509_new() to allocate certificates that will be freed later
10337 with X509_free(). Previously, some parts of the unit tests had
10338 used tor_malloc_zero(), which is incorrect, and which caused test
10339 failures on Windows when they were built with extra hardening.
10340 Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
10342 - While running the circuit_timeout test, fix the PRNG to a
10343 deterministic AES stream, so that the test coverage from this test
10344 will itself be deterministic. Fixes bug 25995; bugfix
10347 o Minor bugfixes (vanguards):
10348 - Allow the last hop in a vanguard circuit to be the same as our
10349 first, to prevent the adversary from influencing guard node choice
10350 by choice of last hop. Also prevent the creation of A - B - A
10351 paths, or A - A paths, which are forbidden by relays. Fixes bug
10352 25870; bugfix on 0.3.3.1-alpha.
10354 o Code simplification and refactoring:
10355 - Remove duplicate code in parse_{c,s}method_line and bootstrap
10356 their functionalities into a single function. Fixes bug 6236;
10357 bugfix on 0.2.3.6-alpha.
10358 - We remove the PortForwarding and PortForwardingHelper options,
10359 related functions, and the port_forwarding tests. These options
10360 were used by the now-deprecated Vidalia to help ordinary users
10361 become Tor relays or bridges. Closes ticket 25409. Patch by
10363 - In order to make the OR and dir checking function in router.c less
10364 confusing we renamed some functions and
10365 consider_testing_reachability() has been split into
10366 router_should_check_reachability() and
10367 router_do_reachability_checks(). Also we improved the documentation
10368 in some functions. Closes ticket 18918.
10369 - Initial work to isolate Libevent usage to a handful of modules in
10370 our codebase, to simplify our call structure, and so that we can
10371 more easily change event loops in the future if needed. Closes
10373 - Introduce a function to call getsockname() and return tor_addr_t,
10374 to save a little complexity throughout the codebase. Closes
10376 - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
10377 as hsdir_index is always present. Also, we move hsdir_index_t into
10378 or.h. Closes ticket 23094. Patch by Neel Chauhan.
10379 - Merge functions used for describing nodes and suppress the
10380 functions that do not allocate memory for the output buffer
10381 string. NODE_DESC_BUF_LEN constant and format_node_description()
10382 function cannot be used externally from router.c module anymore.
10383 Closes ticket 25432. Patch by valentecaio.
10384 - Our main loop has been simplified so that all important operations
10385 happen inside events. Previously, some operations had to happen
10386 outside the event loop, to prevent infinite sequences of event
10387 activations. Closes ticket 25374.
10388 - Put a SHA1 public key digest in hs_service_intro_point_t, and use
10389 it in register_intro_circ() and service_intro_point_new(). This
10390 prevents the digest from being re-calculated each time. Closes
10391 ticket 23107. Patch by Neel Chauhan.
10392 - Refactor token-bucket implementations to use a common backend.
10393 Closes ticket 25766.
10394 - Remove extern declaration of stats_n_seconds_working variable from
10395 main, protecting its accesses with get_uptime() and reset_uptime()
10396 functions. Closes ticket 25081, patch by “valentecaio”.
10397 - Remove our previous logic for "cached gettimeofday()" -- our
10398 coarse monotonic timers are fast enough for this purpose, and far
10399 less error-prone. Implements part of ticket 25927.
10400 - Remove the return value for fascist_firewall_choose_address_base(),
10401 and sister functions such as fascist_firewall_choose_address_node()
10402 and fascist_firewall_choose_address_rs(). Also, while we're here,
10403 initialize the ap argument as leaving it uninitialized can pose a
10404 security hazard. Closes ticket 24734. Patch by Neel Chauhan.
10405 - Rename two fields of connection_t struct. timestamp_lastwritten is
10406 renamed to timestamp_last_write_allowed and timestamp_lastread is
10407 renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
10409 - Since Tor requires C99, remove our old workaround code for libc
10410 implementations where free(NULL) doesn't work. Closes ticket 24484.
10411 - Use our standard rate-limiting code to deal with excessive
10412 libevent failures, rather than the hand-rolled logic we had
10413 before. Closes ticket 26016.
10414 - We remove the return value of node_get_prim_orport() and
10415 node_get_prim_dirport(), and introduce node_get_prim_orport() in
10416 node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
10417 check for a null address. Closes ticket 23873. Patch by
10419 - We switch to should_record_bridge_info() in
10420 geoip_note_client_seen() and options_need_geoip_info() instead of
10421 accessing the configuration values directly. Fixes bug 25290;
10422 bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
10424 o Deprecated features:
10425 - As we are not recommending 0.2.5 anymore, we require relays that
10426 once had an ed25519 key associated with their RSA key to always
10427 have that key, instead of allowing them to drop back to a version
10428 that didn't support ed25519. This means they need to use a new RSA
10429 key if they want to downgrade to an older version of tor without
10430 ed25519. Closes ticket 20522.
10433 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
10434 ticket 25857. Patch from "CTassisF".
10436 o Removed features:
10437 - Directory authorities will no longer support voting according to
10438 any consensus method before consensus method 25. This keeps
10439 authorities compatible with all authorities running 0.2.9.8 and
10440 later, and does not break any clients or relays. Implements ticket
10441 24378 and proposal 290.
10442 - The PortForwarding and PortForwardingHelper features have been
10443 removed. The reasoning is, given that implementations of NAT
10444 traversal protocols within common consumer grade routers are
10445 frequently buggy, and that the target audience for a NAT punching
10446 feature is a perhaps less-technically-inclined relay operator,
10447 when the helper fails to setup traversal the problems are usually
10448 deep, ugly, and very router specific, making them horrendously
10449 impossible for technical support to reliable assist with, and thus
10450 resulting in frustration all around. Unfortunately, relay
10451 operators who would like to run relays behind NATs will need to
10452 become more familiar with the port forwarding configurations on
10453 their local router. Closes 25409.
10454 - The TestingEnableTbEmptyEvent option has been removed. It was used
10455 in testing simulations to measure how often connection buckets
10456 were emptied, in order to improve our scheduling, but it has not
10457 been actively used in years. Closes ticket 25760.
10458 - The old "round-robin" circuit multiplexer (circuitmux)
10459 implementation has been removed, along with a fairly large set of
10460 code that existed to support it. It has not been the default
10461 circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
10462 but it still required an unreasonable amount of memory and CPU.
10463 Closes ticket 25268.
10466 Changes in version 0.3.3.5-rc - 2018-04-15
10467 Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
10468 including some that could affect reliability or correctness.
10470 This is the first release candidate in the 0.3.3 series. If we find no
10471 new bugs or regression here, then the first stable 0.3.3 release will
10472 be nearly identical to this one.
10474 o Major bugfixes (security, protover, voting):
10475 - Revise Rust implementation of protover to use a more memory-
10476 efficient voting algorithm and corresponding data structures, thus
10477 avoiding a potential memory-based DoS attack where specially
10478 crafted protocol strings would expand to fill available memory.
10479 Fixes bug 24031; bugfix on 0.3.3.1-alpha.
10481 o Major bugfixes (performance, load balancing):
10482 - Directory authorities no longer vote in favor of the Guard flag
10483 for relays without directory support. Starting in Tor
10484 0.3.0.1-alpha, clients have been avoiding using such relays in the
10485 Guard position, leading to increasingly broken load balancing for
10486 the 5%-or-so of Guards that don't advertise directory support.
10487 Fixes bug 22310; bugfix on 0.3.0.6.
10489 o Minor feature (continuous integration):
10490 - Update the Travis CI configuration to use the stable Rust channel,
10491 now that we have decided to require that. Closes ticket 25714.
10493 o Minor features (config options):
10494 - Change the way the default value for MaxMemInQueues is calculated.
10495 We now use 40% of the hardware RAM if the system has 8 GB RAM or
10496 more. Otherwise we use the former value of 75%. Closes
10499 o Minor features (geoip):
10500 - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
10501 Country database. Closes ticket 25718.
10503 o Minor bugfixes (client):
10504 - When using a listed relay as a bridge, and also using
10505 microdescriptors, and considering that relay as a non-bridge in a
10506 circuit, treat its microdescriptor as a valid source of
10507 information about that relay. This change should prevent a non-
10508 fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
10510 o Minor bugfixes (controller):
10511 - Restore the correct operation of the RESOLVE command, which had
10512 been broken since we added the ability to enable/disable DNS on
10513 specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
10515 o Minor bugfixes (distribution, compilation, rust):
10516 - Build correctly when the rust dependencies submodule is loaded,
10517 but the TOR_RUST_DEPENDENCIES environment variable is not set.
10518 Fixes bug 25679; bugfix on 0.3.3.1-alpha.
10519 - Actually include all of our Rust source in our source
10520 distributions. (Previously, a few of the files were accidentally
10521 omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
10523 o Minor bugfixes (documentation):
10524 - Document that the PerConnBW{Rate,Burst} options will fall back to
10525 their corresponding consensus parameters only if those parameters
10526 are set. Previously we had claimed that these values would always
10527 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
10528 - Revert a misformatting issue in the ExitPolicy documentation.
10529 Fixes bug 25582; bugfix on 0.3.3.1-alpha.
10531 o Minor bugfixes (exit relay DNS retries):
10532 - Re-attempt timed-out DNS queries 3 times before failure, since our
10533 timeout is 5 seconds for them, but clients wait 10-15. Also allow
10534 slightly more timeouts per resolver when an exit has multiple
10535 resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
10537 o Minor bugfixes (onion services):
10538 - Re-instate counting the client HSDir fetch circuits against the
10539 MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
10541 - Remove underscores from the _HSLayer{2,3}Nodes options. This
10542 expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
10543 Fixes bug 25581; bugfix on 0.3.3.1-alpha
10545 o Code simplification and refactoring:
10546 - Move the list of default directory authorities to its own file.
10547 Closes ticket 24854. Patch by "beastr0".
10549 o Documentation (manpage, denial of service):
10550 - Provide more detail about the denial-of-service options, by
10551 listing each mitigation and explaining how they relate. Closes
10555 Changes in version 0.3.3.4-alpha - 2018-03-29
10556 Tor 0.3.3.4-alpha includes various bugfixes for issues found during
10557 the alpha testing of earlier releases in its series. We are
10558 approaching a stable 0.3.3.4-alpha release: more testing is welcome!
10560 o New system requirements:
10561 - When built with Rust, Tor now depends on version 0.2.39 of the
10562 libc crate. Closes tickets 25310 and 25664.
10564 o Major bugfixes (relay, connection):
10565 - If we have failed to connect to a relay and received a connection
10566 refused, timeout, or similar error (at the TCP level), do not try
10567 that same address/port again for 60 seconds after the failure has
10568 occurred. Fixes bug 24767; bugfix on 0.0.6.
10570 o Minor features (geoip):
10571 - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
10572 Country database. Closes ticket 25469.
10574 o Minor features (log messages):
10575 - Improve log message in the out-of-memory handler to include
10576 information about memory usage from the different compression
10577 backends. Closes ticket 25372.
10579 o Minor features (sandbox):
10580 - Explicitly permit the poll() system call when the Linux
10581 seccomp2-based sandbox is enabled: apparently, some versions of
10582 libc use poll() when calling getpwnam(). Closes ticket 25313.
10584 o Minor bugfixes (C correctness):
10585 - Fix a very unlikely (impossible, we believe) null pointer
10586 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10587 Coverity; this is CID 1430932.
10589 o Minor bugfixes (channel, client):
10590 - Better identify client connection when reporting to the geoip
10591 client cache. Fixes bug 24904; bugfix on 0.3.1.7.
10593 o Minor bugfixes (compilation):
10594 - Fix a C99 compliance issue in our configuration script that caused
10595 compilation issues when compiling Tor with certain versions of
10596 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
10598 o Minor bugfixes (controller, reliability):
10599 - Avoid a (nonfatal) assertion failure when extending a one-hop
10600 circuit from the controller to become a multihop circuit. Fixes
10601 bug 24903; bugfix on 0.2.5.2-alpha.
10603 o Major bugfixes (networking):
10604 - Tor will no longer reject IPv6 address strings from Tor Browser
10605 when they are passed as hostnames in SOCKS5 requests. Fixes bug
10606 25036, bugfix on Tor 0.3.1.2.
10608 o Minor bugfixes (networking):
10609 - string_is_valid_hostname() will not consider IP strings to be
10610 valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
10612 o Minor bugfixes (onion service v3):
10613 - Avoid an assertion failure when the next onion service
10614 descriptor rotation type is out of sync with the consensus's
10615 valid-after time. Instead, log a warning message with extra
10616 information, so we can better hunt down the cause of this
10617 assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
10619 o Minor bugfixes (testing):
10620 - Avoid intermittent test failures due to a test that had relied on
10621 onion service introduction point creation finishing within 5
10622 seconds of real clock time. Fixes bug 25450; bugfix
10624 - Rust crates are now automatically detected and tested. Previously,
10625 some crates were not tested by `make test-rust` due to a static
10626 string in the `src/test/test_rust.sh` script specifying which
10627 crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
10629 o Minor bugfixes (testing, benchmarks):
10630 - Fix a crash when running benchmark tests on win32 systems. The
10631 crash was due to a mutex that wasn't initialized before logging
10632 and options were initialized. Fixes bug 25479; bugfix
10635 o Minor bugfixes (warnings, ipv6):
10636 - Avoid a bug warning that could occur when trying to connect to a
10637 relay over IPv6. This warning would occur on a Tor instance that
10638 downloads router descriptors, but prefers to use microdescriptors.
10639 Fixes bug 25213; bugfix on 0.3.3.1-alpha.
10641 o Code simplification and refactoring:
10642 - Remove the old (deterministic) directory retry logic entirely:
10643 We've used exponential backoff exclusively for some time. Closes
10647 - Improved the documentation of AccountingStart parameter. Closes
10649 - Update the documentation for "Log" to include the current list of
10650 logging domains. Closes ticket 25378.
10653 Changes in version 0.3.1.10 - 2018-03-03
10654 Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
10657 It includes an important security fix for a remote crash attack
10658 against directory authorities, tracked as TROVE-2018-001.
10660 This release also backports our new system for improved resistance to
10661 denial-of-service attacks against relays.
10663 This release also fixes several minor bugs and annoyances from
10666 All directory authorities should upgrade to one of the versions
10667 released today. Relays running 0.3.1.x may wish to update to one of
10668 the versions released today, for the DoS mitigations.
10670 Please note: according to our release calendar, Tor 0.3.1 will no
10671 longer be supported after 1 July 2018. If you will be running Tor
10672 after that date, you should make sure to plan to upgrade to the latest
10673 stable version, or downgrade to 0.2.9 (which will receive long-term
10676 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
10677 - Fix a protocol-list handling bug that could be used to remotely crash
10678 directory authorities with a null-pointer exception. Fixes bug 25074;
10679 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
10682 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
10683 - Give relays some defenses against the recent network overload. We
10684 start with three defenses (default parameters in parentheses).
10685 First: if a single client address makes too many concurrent
10686 connections (>100), hang up on further connections. Second: if a
10687 single client address makes circuits too quickly (more than 3 per
10688 second, with an allowed burst of 90) while also having too many
10689 connections open (3), refuse new create cells for the next while
10690 (1-2 hours). Third: if a client asks to establish a rendezvous
10691 point to you directly, ignore the request. These defenses can be
10692 manually controlled by new torrc options, but relays will also
10693 take guidance from consensus parameters, so there's no need to
10694 configure anything manually. Implements ticket 24902.
10696 o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
10697 - Update the sandbox rules so that they should now work correctly
10698 with Glibc 2.26. Closes ticket 24315.
10700 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
10701 - Fix an "off by 2" error in counting rendezvous failures on the
10702 onion service side. While we thought we would stop the rendezvous
10703 attempt after one failed circuit, we were actually making three
10704 circuit attempts before giving up. Now switch to a default of 2,
10705 and allow the consensus parameter "hs_service_max_rdv_failures" to
10706 override. Fixes bug 24895; bugfix on 0.0.6.
10708 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
10709 - Add Link protocol version 5 to the supported protocols list. Fixes
10710 bug 25070; bugfix on 0.3.1.1-alpha.
10712 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
10713 - Fix a set of false positives where relays would consider
10714 connections to other relays as being client-only connections (and
10715 thus e.g. deserving different link padding schemes) if those
10716 relays fell out of the consensus briefly. Now we look only at the
10717 initial handshake and whether the connection authenticated as a
10718 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
10720 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
10721 - Make our OOM handler aware of the geoip client history cache so it
10722 doesn't fill up the memory. This check is important for IPv6 and
10723 our DoS mitigation subsystem. Closes ticket 25122.
10725 o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
10726 - Change relay bandwidth reporting stats interval from 4 hours to 24
10727 hours in order to reduce the efficiency of guard discovery
10728 attacks. Fixes ticket 23856.
10730 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
10731 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
10732 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
10733 since they neither disabled TLS 1.3 nor enabled any of the
10734 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
10735 Closes ticket 24978.
10737 o Minor features (fallback directory mirrors, backport from 0.3.2.9):
10738 - The fallback directory list has been re-generated based on the
10739 current status of the network. Tor uses fallback directories to
10740 bootstrap when it doesn't yet have up-to-date directory
10741 information. Closes ticket 24801.
10742 - Make the default DirAuthorityFallbackRate 0.1, so that clients
10743 prefer to bootstrap from fallback directory mirrors. This is a
10744 follow-up to 24679, which removed weights from the default
10745 fallbacks. Implements ticket 24681.
10747 o Minor features (geoip):
10748 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
10751 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
10752 - Use the actual observed address of an incoming relay connection,
10753 not the canonical address of the relay from its descriptor, when
10754 making decisions about how to handle the incoming connection.
10755 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
10757 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
10758 - Directory authorities, when refusing a descriptor from a rejected
10759 relay, now explicitly tell the relay (in its logs) to set a valid
10760 ContactInfo address and contact the bad-relays@ mailing list.
10761 Fixes bug 25170; bugfix on 0.2.9.1.
10763 o Minor bugfixes (address selection, backport from 0.3.2.9):
10764 - When the fascist_firewall_choose_address_ functions don't find a
10765 reachable address, set the returned address to the null address
10766 and port. This is a precautionary measure, because some callers do
10767 not check the return value. Fixes bug 24736; bugfix
10770 o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
10771 - Fetch descriptors aggressively whenever we lack enough to build
10772 circuits, regardless of how many descriptors we are missing.
10773 Previously, we would delay launching the fetch when we had fewer
10774 than 15 missing descriptors, even if some of those descriptors
10775 were blocking circuits from building. Fixes bug 23985; bugfix on
10776 0.1.1.11-alpha. The effects of this bug became worse in
10777 0.3.0.3-alpha, when we began treating missing descriptors from our
10778 primary guards as a reason to delay circuits.
10779 - Don't try fetching microdescriptors from relays that have failed
10780 to deliver them in the past. Fixes bug 23817; bugfix
10783 o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
10784 - Fix a signed/unsigned comparison warning introduced by our fix to
10785 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
10787 o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
10788 - Avoid a crash when attempting to use the seccomp2 sandbox together
10789 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
10792 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
10793 - Fix a possible crash on malformed consensus. If a consensus had
10794 contained an unparseable protocol line, it could have made clients
10795 and relays crash with a null-pointer exception. To exploit this
10796 issue, however, an attacker would need to be able to subvert the
10797 directory authority system. Fixes bug 25251; bugfix on
10798 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
10800 o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
10801 - Recover better from empty or corrupt files in the consensus cache
10802 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
10803 - When a consensus diff calculation is only partially successful,
10804 only record the successful parts as having succeeded. Partial
10805 success can happen if (for example) one compression method fails
10806 but the others succeed. Previously we misrecorded all the
10807 calculations as having succeeded, which would later cause a
10808 nonfatal assertion failure. Fixes bug 24086; bugfix
10811 o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
10812 - Tor now updates its guard state when it reads a consensus
10813 regardless of whether it's missing descriptors. That makes tor use
10814 its primary guards to fetch descriptors in some edge cases where
10815 it would previously have used fallback directories. Fixes bug
10816 23862; bugfix on 0.3.0.1-alpha.
10818 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
10819 - Don't treat inability to store a cached consensus object as a bug:
10820 it can happen normally when we are out of disk space. Fixes bug
10821 24859; bugfix on 0.3.1.1-alpha.
10823 o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
10824 - When queuing DESTROY cells on a channel, only queue the circuit-id
10825 and reason fields: not the entire 514-byte cell. This fix should
10826 help mitigate any bugs or attacks that fill up these queues, and
10827 free more RAM for other uses. Fixes bug 24666; bugfix
10830 o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
10831 - When closing a connection via close_connection_immediately(), we
10832 mark it as "not blocked on bandwidth", to prevent later calls from
10833 trying to unblock it, and give it permission to read. This fixes a
10834 backtrace warning that can happen on relays under various
10835 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
10837 o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
10838 - When selecting relays by bandwidth, avoid a rounding error that
10839 could sometimes cause load to be imbalanced incorrectly.
10840 Previously, we would always round upwards; now, we round towards
10841 the nearest integer. This had the biggest effect when a relay's
10842 weight adjustments should have given it weight 0, but it got
10843 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
10844 - When calculating the fraction of nodes that have descriptors, and
10845 all nodes in the network have zero bandwidths, count the number of
10846 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
10847 - Actually log the total bandwidth in compute_weighted_bandwidths().
10848 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
10850 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
10851 - Improve the performance of our consensus-diff application code
10852 when Tor is built with the --enable-fragile-hardening option set.
10853 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
10855 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
10856 - Don't exit the Tor process if setrlimit() fails to change the file
10857 limit (which can happen sometimes on some versions of OSX). Fixes
10858 bug 21074; bugfix on 0.0.9pre5.
10860 o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
10861 - Fix a bug in the bit-counting parts of our timing-wheel code on
10862 MSVC. (Note that MSVC is still not a supported build platform, due
10863 to cyptographic timing channel risks.) Fixes bug 24633; bugfix
10866 o Minor bugfixes (relay, partial backport):
10867 - Make the internal channel_is_client() function look at what sort
10868 of connection handshake the other side used, rather than whether
10869 the other side ever sent a create_fast cell to us. Backports part
10870 of the fixes from bugs 22805 and 24898.
10872 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
10873 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
10875 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
10876 bugfix on 0.2.9.4-alpha.
10878 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
10879 - Update the "rust dependencies" submodule to be a project-level
10880 repository, rather than a user repository. Closes ticket 25323.
10883 Changes in version 0.2.9.15 - 2018-03-03
10884 Tor 0.2.9.15 backports important security and stability bugfixes from
10885 later Tor releases.
10887 It includes an important security fix for a remote crash attack
10888 against directory authorities, tracked as TROVE-2018-001.
10890 This release also backports our new system for improved resistance to
10891 denial-of-service attacks against relays.
10893 This release also fixes several minor bugs and annoyances from
10896 All directory authorities should upgrade to one of the versions
10897 released today. Relays running 0.2.9.x may wish to update to one of
10898 the versions released today, for the DoS mitigations.
10900 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
10901 - Fix a protocol-list handling bug that could be used to remotely crash
10902 directory authorities with a null-pointer exception. Fixes bug 25074;
10903 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
10906 o Major features (denial-of-service mitigation):
10907 - Give relays some defenses against the recent network overload. We
10908 start with three defenses (default parameters in parentheses).
10909 First: if a single client address makes too many concurrent
10910 connections (>100), hang up on further connections. Second: if a
10911 single client address makes circuits too quickly (more than 3 per
10912 second, with an allowed burst of 90) while also having too many
10913 connections open (3), refuse new create cells for the next while
10914 (1-2 hours). Third: if a client asks to establish a rendezvous
10915 point to you directly, ignore the request. These defenses can be
10916 manually controlled by new torrc options, but relays will also
10917 take guidance from consensus parameters, so there's no need to
10918 configure anything manually. Implements ticket 24902.
10920 o Major bugfixes (bootstrapping):
10921 - Fetch descriptors aggressively whenever we lack enough to build
10922 circuits, regardless of how many descriptors we are missing.
10923 Previously, we would delay launching the fetch when we had fewer
10924 than 15 missing descriptors, even if some of those descriptors
10925 were blocking circuits from building. Fixes bug 23985; bugfix on
10926 0.1.1.11-alpha. The effects of this bug became worse in
10927 0.3.0.3-alpha, when we began treating missing descriptors from our
10928 primary guards as a reason to delay circuits.
10930 o Major bugfixes (onion services, retry behavior):
10931 - Fix an "off by 2" error in counting rendezvous failures on the
10932 onion service side. While we thought we would stop the rendezvous
10933 attempt after one failed circuit, we were actually making three
10934 circuit attempts before giving up. Now switch to a default of 2,
10935 and allow the consensus parameter "hs_service_max_rdv_failures" to
10936 override. Fixes bug 24895; bugfix on 0.0.6.
10938 o Minor feature (relay statistics):
10939 - Change relay bandwidth reporting stats interval from 4 hours to 24
10940 hours in order to reduce the efficiency of guard discovery
10941 attacks. Fixes ticket 23856.
10943 o Minor features (compatibility, OpenSSL):
10944 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
10945 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
10946 since they neither disabled TLS 1.3 nor enabled any of the
10947 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
10948 Closes ticket 24978.
10950 o Minor features (denial-of-service avoidance):
10951 - Make our OOM handler aware of the geoip client history cache so it
10952 doesn't fill up the memory. This check is important for IPv6 and
10953 our DoS mitigation subsystem. Closes ticket 25122.
10955 o Minor features (fallback directory mirrors):
10956 - The fallback directory list has been re-generated based on the
10957 current status of the network. Tor uses fallback directories to
10958 bootstrap when it doesn't yet have up-to-date directory
10959 information. Closes ticket 24801.
10960 - Make the default DirAuthorityFallbackRate 0.1, so that clients
10961 prefer to bootstrap from fallback directory mirrors. This is a
10962 follow-up to 24679, which removed weights from the default
10963 fallbacks. Implements ticket 24681.
10965 o Minor features (geoip):
10966 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
10969 o Minor features (linux seccomp2 sandbox):
10970 - Update the sandbox rules so that they should now work correctly
10971 with Glibc 2.26. Closes ticket 24315.
10973 o Minor bugfix (channel connection):
10974 - Use the actual observed address of an incoming relay connection,
10975 not the canonical address of the relay from its descriptor, when
10976 making decisions about how to handle the incoming connection.
10977 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
10979 o Minor bugfix (directory authority):
10980 - Directory authorities, when refusing a descriptor from a rejected
10981 relay, now explicitly tell the relay (in its logs) to set a valid
10982 ContactInfo address and contact the bad-relays@ mailing list.
10983 Fixes bug 25170; bugfix on 0.2.9.1.
10985 o Minor bugfixes (address selection):
10986 - When the fascist_firewall_choose_address_ functions don't find a
10987 reachable address, set the returned address to the null address
10988 and port. This is a precautionary measure, because some callers do
10989 not check the return value. Fixes bug 24736; bugfix
10992 o Minor bugfixes (compilation):
10993 - Fix a signed/unsigned comparison warning introduced by our fix to
10994 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
10996 o Minor bugfixes (control port, linux seccomp2 sandbox):
10997 - Avoid a crash when attempting to use the seccomp2 sandbox together
10998 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
11001 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
11002 - Fix a possible crash on malformed consensus. If a consensus had
11003 contained an unparseable protocol line, it could have made clients
11004 and relays crash with a null-pointer exception. To exploit this
11005 issue, however, an attacker would need to be able to subvert the
11006 directory authority system. Fixes bug 25251; bugfix on
11007 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11009 o Minor bugfixes (memory usage):
11010 - When queuing DESTROY cells on a channel, only queue the circuit-id
11011 and reason fields: not the entire 514-byte cell. This fix should
11012 help mitigate any bugs or attacks that fill up these queues, and
11013 free more RAM for other uses. Fixes bug 24666; bugfix
11016 o Minor bugfixes (network layer):
11017 - When closing a connection via close_connection_immediately(), we
11018 mark it as "not blocked on bandwidth", to prevent later calls from
11019 trying to unblock it, and give it permission to read. This fixes a
11020 backtrace warning that can happen on relays under various
11021 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
11023 o Minor bugfixes (OSX):
11024 - Don't exit the Tor process if setrlimit() fails to change the file
11025 limit (which can happen sometimes on some versions of OSX). Fixes
11026 bug 21074; bugfix on 0.0.9pre5.
11028 o Minor bugfixes (path selection):
11029 - When selecting relays by bandwidth, avoid a rounding error that
11030 could sometimes cause load to be imbalanced incorrectly.
11031 Previously, we would always round upwards; now, we round towards
11032 the nearest integer. This had the biggest effect when a relay's
11033 weight adjustments should have given it weight 0, but it got
11034 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
11035 - When calculating the fraction of nodes that have descriptors, and
11036 all nodes in the network have zero bandwidths, count the number of
11037 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
11038 - Actually log the total bandwidth in compute_weighted_bandwidths().
11039 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
11041 o Minor bugfixes (portability, msvc):
11042 - Fix a bug in the bit-counting parts of our timing-wheel code on
11043 MSVC. (Note that MSVC is still not a supported build platform, due
11044 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
11047 o Minor bugfixes (relay):
11048 - Make the internal channel_is_client() function look at what sort
11049 of connection handshake the other side used, rather than whether
11050 the other side ever sent a create_fast cell to us. Backports part
11051 of the fixes from bugs 22805 and 24898.
11053 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
11054 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11056 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11057 bugfix on 0.2.9.4-alpha.
11060 Changes in version 0.3.2.10 - 2018-03-03
11061 Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
11062 backports a number of bugfixes, including important fixes for security
11065 It includes an important security fix for a remote crash attack
11066 against directory authorities, tracked as TROVE-2018-001.
11068 Additionally, it backports a fix for a bug whose severity we have
11069 upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
11070 triggered in order to crash relays with a use-after-free pattern. As
11071 such, we are now tracking that bug as TROVE-2018-002 and
11072 CVE-2018-0491, and backporting it to earlier releases. This bug
11073 affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
11076 This release also backports our new system for improved resistance to
11077 denial-of-service attacks against relays.
11079 This release also fixes several minor bugs and annoyances from
11082 Relays running 0.3.2.x SHOULD upgrade to one of the versions released
11083 today, for the fix to TROVE-2018-002. Directory authorities should
11084 also upgrade. (Relays on earlier versions might want to update too for
11085 the DoS mitigations.)
11087 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11088 - Fix a protocol-list handling bug that could be used to remotely crash
11089 directory authorities with a null-pointer exception. Fixes bug 25074;
11090 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11093 o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
11094 - Avoid adding the same channel twice in the KIST scheduler pending
11095 list, which could lead to remote denial-of-service use-after-free
11096 attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
11098 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
11099 - Give relays some defenses against the recent network overload. We
11100 start with three defenses (default parameters in parentheses).
11101 First: if a single client address makes too many concurrent
11102 connections (>100), hang up on further connections. Second: if a
11103 single client address makes circuits too quickly (more than 3 per
11104 second, with an allowed burst of 90) while also having too many
11105 connections open (3), refuse new create cells for the next while
11106 (1-2 hours). Third: if a client asks to establish a rendezvous
11107 point to you directly, ignore the request. These defenses can be
11108 manually controlled by new torrc options, but relays will also
11109 take guidance from consensus parameters, so there's no need to
11110 configure anything manually. Implements ticket 24902.
11112 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
11113 - Fix an "off by 2" error in counting rendezvous failures on the
11114 onion service side. While we thought we would stop the rendezvous
11115 attempt after one failed circuit, we were actually making three
11116 circuit attempts before giving up. Now switch to a default of 2,
11117 and allow the consensus parameter "hs_service_max_rdv_failures" to
11118 override. Fixes bug 24895; bugfix on 0.0.6.
11119 - New-style (v3) onion services now obey the "max rendezvous circuit
11120 attempts" logic. Previously they would make as many rendezvous
11121 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
11122 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
11124 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
11125 - Add Link protocol version 5 to the supported protocols list. Fixes
11126 bug 25070; bugfix on 0.3.1.1-alpha.
11128 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
11129 - Fix a set of false positives where relays would consider
11130 connections to other relays as being client-only connections (and
11131 thus e.g. deserving different link padding schemes) if those
11132 relays fell out of the consensus briefly. Now we look only at the
11133 initial handshake and whether the connection authenticated as a
11134 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
11136 o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
11137 - The scheduler subsystem was failing to promptly notice changes in
11138 consensus parameters, making it harder to switch schedulers
11139 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
11141 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
11142 - Make our OOM handler aware of the geoip client history cache so it
11143 doesn't fill up the memory. This check is important for IPv6 and
11144 our DoS mitigation subsystem. Closes ticket 25122.
11146 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
11147 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11148 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11149 since they neither disabled TLS 1.3 nor enabled any of the
11150 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11151 Closes ticket 24978.
11153 o Minor features (geoip):
11154 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11157 o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
11158 - When logging a failure to create an onion service's descriptor,
11159 also log what the problem with the descriptor was. Diagnostic
11162 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
11163 - Use the actual observed address of an incoming relay connection,
11164 not the canonical address of the relay from its descriptor, when
11165 making decisions about how to handle the incoming connection.
11166 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11168 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
11169 - Fix a possible crash on malformed consensus. If a consensus had
11170 contained an unparseable protocol line, it could have made clients
11171 and relays crash with a null-pointer exception. To exploit this
11172 issue, however, an attacker would need to be able to subvert the
11173 directory authority system. Fixes bug 25251; bugfix on
11174 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11176 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
11177 - Directory authorities, when refusing a descriptor from a rejected
11178 relay, now explicitly tell the relay (in its logs) to set a valid
11179 ContactInfo address and contact the bad-relays@ mailing list.
11180 Fixes bug 25170; bugfix on 0.2.9.1.
11182 o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
11183 - When building with Rust on OSX, link against libresolv, to work
11184 around the issue at https://github.com/rust-lang/rust/issues/46797.
11185 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
11187 o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
11188 - Remove a BUG() statement when a client fetches an onion descriptor
11189 that has a lower revision counter than the one in its cache. This
11190 can happen in normal circumstances due to HSDir desync. Fixes bug
11191 24976; bugfix on 0.3.2.1-alpha.
11193 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
11194 - Don't treat inability to store a cached consensus object as a bug:
11195 it can happen normally when we are out of disk space. Fixes bug
11196 24859; bugfix on 0.3.1.1-alpha.
11198 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
11199 - Improve the performance of our consensus-diff application code
11200 when Tor is built with the --enable-fragile-hardening option set.
11201 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
11203 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
11204 - Don't exit the Tor process if setrlimit() fails to change the file
11205 limit (which can happen sometimes on some versions of OSX). Fixes
11206 bug 21074; bugfix on 0.0.9pre5.
11208 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
11209 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11211 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11212 bugfix on 0.2.9.4-alpha.
11214 o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
11215 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
11216 25005; bugfix on 0.3.2.7-rc.
11218 o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
11219 - Look at the "HSRend" protocol version, not the "HSDir" protocol
11220 version, when deciding whether a consensus entry can support the
11221 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
11222 bugfix on 0.3.2.1-alpha.
11224 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
11225 - Update the "rust dependencies" submodule to be a project-level
11226 repository, rather than a user repository. Closes ticket 25323.
11228 o Documentation (backport from 0.3.3.1-alpha)
11229 - Document that operators who run more than one relay or bridge are
11230 expected to set MyFamily and ContactInfo correctly. Closes
11234 Changes in version 0.3.3.3-alpha - 2018-03-03
11235 Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
11236 It includes an important security fix for a remote crash attack
11237 against directory authorities tracked as TROVE-2018-001.
11239 Additionally, with this release, we are upgrading the severity of a
11240 bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
11241 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
11242 a use-after-free pattern. As such, we are now tracking that bug as
11243 TROVE-2018-002 and CVE-2018-0491. This bug affected versions
11244 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
11246 This release also fixes several minor bugs and annoyances from
11249 Relays running 0.3.2.x should upgrade to one of the versions released
11250 today, for the fix to TROVE-2018-002. Directory authorities should
11251 also upgrade. (Relays on earlier versions might want to update too for
11252 the DoS mitigations.)
11254 o Major bugfixes (denial-of-service, directory authority):
11255 - Fix a protocol-list handling bug that could be used to remotely crash
11256 directory authorities with a null-pointer exception. Fixes bug 25074;
11257 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11260 o Minor features (compatibility, OpenSSL):
11261 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11262 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11263 since they neither disabled TLS 1.3 nor enabled any of the
11264 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11265 Closes ticket 24978.
11267 o Minor features (logging):
11268 - Clarify the log messages produced when getrandom() or a related
11269 entropy-generation mechanism gives an error. Closes ticket 25120.
11271 o Minor features (testing):
11272 - Add a "make test-rust" target to run the rust tests only. Closes
11275 o Minor bugfixes (denial-of-service):
11276 - Fix a possible crash on malformed consensus. If a consensus had
11277 contained an unparseable protocol line, it could have made clients
11278 and relays crash with a null-pointer exception. To exploit this
11279 issue, however, an attacker would need to be able to subvert the
11280 directory authority system. Fixes bug 25251; bugfix on
11281 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11283 o Minor bugfixes (DoS mitigation):
11284 - Add extra safety checks when refilling the circuit creation bucket
11285 to ensure we never set a value above the allowed maximum burst.
11286 Fixes bug 25202; bugfix on 0.3.3.2-alpha.
11287 - When a new consensus arrives, don't update our DoS-mitigation
11288 parameters if we aren't a public relay. Fixes bug 25223; bugfix
11291 o Minor bugfixes (man page, SocksPort):
11292 - Remove dead code from the old "SocksSocket" option, and rename
11293 SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
11294 still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
11296 o Minor bugfixes (performance):
11297 - Reduce the number of circuits that will be opened at once during
11298 the circuit build timeout phase. This is done by increasing the
11299 idle timeout to 3 minutes, and lowering the maximum number of
11300 concurrent learning circuits to 10. Fixes bug 24769; bugfix
11303 o Minor bugfixes (spec conformance):
11304 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11306 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11307 bugfix on 0.2.9.4-alpha.
11309 o Minor bugfixes (spec conformance, rust):
11310 - Resolve a denial-of-service issue caused by an infinite loop in
11311 the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
11312 Also tracked as TROVE-2018-003.
11314 o Code simplification and refactoring:
11315 - Update the "rust dependencies" submodule to be a project-level
11316 repository, rather than a user repository. Closes ticket 25323.
11319 Changes in version 0.3.3.2-alpha - 2018-02-10
11320 Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
11321 introduces a mechanism to handle the high loads that many relay
11322 operators have been reporting recently. It also fixes several bugs in
11323 older releases. If this new code proves reliable, we plan to backport
11324 it to older supported release series.
11326 o Major features (denial-of-service mitigation):
11327 - Give relays some defenses against the recent network overload. We
11328 start with three defenses (default parameters in parentheses).
11329 First: if a single client address makes too many concurrent
11330 connections (>100), hang up on further connections. Second: if a
11331 single client address makes circuits too quickly (more than 3 per
11332 second, with an allowed burst of 90) while also having too many
11333 connections open (3), refuse new create cells for the next while
11334 (1-2 hours). Third: if a client asks to establish a rendezvous
11335 point to you directly, ignore the request. These defenses can be
11336 manually controlled by new torrc options, but relays will also
11337 take guidance from consensus parameters, so there's no need to
11338 configure anything manually. Implements ticket 24902.
11340 o Major bugfixes (netflow padding):
11341 - Stop adding unneeded channel padding right after we finish
11342 flushing to a connection that has been trying to flush for many
11343 seconds. Instead, treat all partial or complete flushes as
11344 activity on the channel, which will defer the time until we need
11345 to add padding. This fix should resolve confusing and scary log
11346 messages like "Channel padding timeout scheduled 221453ms in the
11347 past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
11349 o Major bugfixes (protocol versions):
11350 - Add Link protocol version 5 to the supported protocols list. Fixes
11351 bug 25070; bugfix on 0.3.1.1-alpha.
11353 o Major bugfixes (scheduler, consensus):
11354 - The scheduler subsystem was failing to promptly notice changes in
11355 consensus parameters, making it harder to switch schedulers
11356 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
11358 o Minor features (denial-of-service avoidance):
11359 - Make our OOM handler aware of the geoip client history cache so it
11360 doesn't fill up the memory. This check is important for IPv6 and
11361 our DoS mitigation subsystem. Closes ticket 25122.
11363 o Minor features (directory authority):
11364 - When directory authorities are unable to add signatures to a
11365 pending consensus, log the reason why. Closes ticket 24849.
11367 o Minor features (geoip):
11368 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11371 o Minor features (logging, diagnostic):
11372 - When logging a failure to create an onion service's descriptor,
11373 also log what the problem with the descriptor was. Diagnostic for
11376 o Minor bugfix (channel connection):
11377 - Use the actual observed address of an incoming relay connection,
11378 not the canonical address of the relay from its descriptor, when
11379 making decisions about how to handle the incoming connection.
11380 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11382 o Minor bugfix (directory authority):
11383 - Directory authorities, when refusing a descriptor from a rejected
11384 relay, now explicitly tell the relay (in its logs) to set a valid
11385 ContactInfo address and contact the bad-relays@ mailing list.
11386 Fixes bug 25170; bugfix on 0.2.9.1.
11388 o Minor bugfixes (all versions of Tor):
11389 - Use the "misspell" tool to detect and fix typos throughout the
11390 source code. Fixes bug 23650; bugfix on various versions of Tor.
11391 Patch from Deepesh Pathak.
11393 o Minor bugfixes (circuit, cannibalization):
11394 - Don't cannibalize preemptively-built circuits if we no longer
11395 recognize their first hop. This situation can happen if our Guard
11396 relay went off the consensus after the circuit was created. Fixes
11397 bug 24469; bugfix on 0.0.6.
11399 o Minor bugfixes (correctness):
11400 - Remove a nonworking, unnecessary check to see whether a circuit
11401 hop's identity digest was set when the circuit failed. Fixes bug
11402 24927; bugfix on 0.2.4.4-alpha.
11404 o Minor bugfixes (logging):
11405 - Don't treat inability to store a cached consensus object as a bug:
11406 it can happen normally when we are out of disk space. Fixes bug
11407 24859; bugfix on 0.3.1.1-alpha.
11408 - Fix a (mostly harmless) race condition when invoking
11409 LOG_PROTOCOL_WARN message from a subthread while the torrc options
11410 are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
11412 o Minor bugfixes (onion services):
11413 - Remove a BUG() statement when a client fetches an onion descriptor
11414 that has a lower revision counter than the one in its cache. This
11415 can happen in normal circumstances due to HSDir desync. Fixes bug
11416 24976; bugfix on 0.3.2.1-alpha.
11417 - If we are configured to offer a single onion service, don't log
11418 long-term established one hop rendezvous points in the heartbeat.
11419 Fixes bug 25116; bugfix on 0.2.9.6-rc.
11421 o Minor bugfixes (performance):
11422 - Avoid calling protocol_list_supports_protocol() from inside tight
11423 loops when running with cached routerinfo_t objects. Instead,
11424 summarize the relevant protocols as flags in the routerinfo_t, as
11425 we do for routerstatus_t objects. This change simplifies our code
11426 a little, and saves a large amount of short-term memory allocation
11427 operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
11429 o Minor bugfixes (Rust FFI):
11430 - Fix a minor memory leak which would happen whenever the C code
11431 would call the Rust implementation of
11432 protover_get_supported_protocols(). This was due to the C version
11433 returning a static string, whereas the Rust version newly allocated
11434 a CString to pass across the FFI boundary. Consequently, the C
11435 code was not expecting to need to free() what it was given. Fixes
11436 bug 25127; bugfix on 0.3.2.1-alpha.
11438 o Minor bugfixes (scheduler, KIST):
11439 - Avoid adding the same channel twice in the KIST scheduler pending
11440 list, which would waste CPU cycles. Fixes bug 24700; bugfix
11443 o Minor bugfixes (unit test, monotonic time):
11444 - Increase a constant (1msec to 10msec) in the monotonic time test
11445 that makes sure the nsec/usec/msec times read are synchronized.
11446 This change was needed to accommodate slow systems like armel or
11447 when the clock_gettime() is not a VDSO on the running kernel.
11448 Fixes bug 25113; bugfix on 0.2.9.1.
11450 o Minor bugfixes (v3 onion services):
11451 - Look at the "HSRend" protocol version, not the "HSDir" protocol
11452 version, when deciding whether a consensus entry can support the
11453 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
11454 bugfix on 0.3.2.1-alpha.
11456 o Code simplification and refactoring:
11457 - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
11459 - Remove a series of counters used to track circuit extend attempts
11460 and connection status but that in reality we aren't using for
11461 anything other than stats logged by a SIGUSR1 signal. Closes
11464 o Documentation (man page):
11465 - The HiddenServiceVersion torrc option accepts only one number:
11466 either version 2 or 3. Closes ticket 25026; bugfix
11470 Changes in version 0.3.3.1-alpha - 2018-01-25
11471 Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
11472 several new features to Tor, including several improvements to
11473 bootstrapping, and support for an experimental "vanguards" feature to
11474 resist guard discovery attacks. This series also includes better
11475 support for applications that need to embed Tor or manage v3
11478 o Major features (embedding):
11479 - There is now a documented stable API for programs that need to
11480 embed Tor. See tor_api.h for full documentation and known bugs.
11481 Closes ticket 23684.
11482 - Tor now has support for restarting in the same process.
11483 Controllers that run Tor using the "tor_api.h" interface can now
11484 restart Tor after Tor has exited. This support is incomplete,
11485 however: we fixed crash bugs that prevented it from working at
11486 all, but many bugs probably remain, including a possibility of
11487 security issues. Implements ticket 24581.
11489 o Major features (IPv6, directory documents):
11490 - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
11491 consensus. This information makes it easier for IPv6 clients to
11492 bootstrap and choose reachable entry guards. Implements ticket 23826.
11493 - Add consensus method 28, which removes IPv6 ORPorts from
11494 microdescriptors. Now that the consensus contains IPv6 ORPorts, they
11495 are redundant in microdescs. This change will be used by Tor clients
11496 on 0.2.8.x and later. (That is to say, with all Tor clients that
11497 have IPv6 bootstrap and guard support.) Implements ticket 23828.
11498 - Expand the documentation for AuthDirHasIPv6Connectivity when it is
11499 set by different numbers of authorities. Fixes 23870
11502 o Major features (onion service v3, control port):
11503 - The control port now supports commands and events for v3 onion
11504 services. It is now possible to create ephemeral v3 services using
11505 ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
11506 CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
11507 DEL_ONION) have been extended to support v3 onion services. Closes
11508 ticket 20699; implements proposal 284.
11510 o Major features (onion services):
11511 - Provide torrc options to pin the second and third hops of onion
11512 service circuits to a list of nodes. The option HSLayer2Guards
11513 pins the second hop, and the option HSLayer3Guards pins the third
11514 hop. These options are for use in conjunction with experiments
11515 with "vanguards" for preventing guard enumeration attacks. Closes
11518 o Major features (rust, portability, experimental):
11519 - Tor now ships with an optional implementation of one of its
11520 smaller modules (protover.c) in the Rust programming language. To
11521 try it out, install a Rust build environment, and configure Tor
11522 with "--enable-rust --enable-cargo-online-mode". This should not
11523 cause any user-visible changes, but should help us gain more
11524 experience with Rust, and plan future Rust integration work.
11525 Implementation by Chelsea Komlo. Closes ticket 22840.
11527 o Minor features (storage, configuration):
11528 - Users can store cached directory documents somewhere other than
11529 the DataDirectory by using the CacheDirectory option. Similarly,
11530 the storage location for relay's keys can be overridden with the
11531 KeyDirectory option. Closes ticket 22703.
11533 o Major features (v3 onion services, ipv6):
11534 - When v3 onion service clients send introduce cells, they now
11535 include the IPv6 address of the rendezvous point, if it has one.
11536 Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
11537 in future Tor versions, IPv6-only v3 single onion services will be
11538 able to use IPv6 addresses to connect directly to the rendezvous
11539 point. Closes ticket 23577. Patch by Neel Chauhan.
11541 o Major bugfixes (onion services, retry behavior):
11542 - Fix an "off by 2" error in counting rendezvous failures on the
11543 onion service side. While we thought we would stop the rendezvous
11544 attempt after one failed circuit, we were actually making three
11545 circuit attempts before giving up. Now switch to a default of 2,
11546 and allow the consensus parameter "hs_service_max_rdv_failures" to
11547 override. Fixes bug 24895; bugfix on 0.0.6.
11548 - New-style (v3) onion services now obey the "max rendezvous circuit
11549 attempts" logic. Previously they would make as many rendezvous
11550 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
11551 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
11553 o Major bugfixes (relays):
11554 - Fix a set of false positives where relays would consider
11555 connections to other relays as being client-only connections (and
11556 thus e.g. deserving different link padding schemes) if those
11557 relays fell out of the consensus briefly. Now we look only at the
11558 initial handshake and whether the connection authenticated as a
11559 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
11561 o Minor feature (IPv6):
11562 - Make IPv6-only clients wait for microdescs for relays, even if we
11563 were previously using descriptors (or were using them as a bridge)
11564 and have a cached descriptor for them. Implements ticket 23827.
11565 - When a consensus has IPv6 ORPorts, make IPv6-only clients use
11566 them, rather than waiting to download microdescriptors.
11567 Implements ticket 23827.
11569 o Minor features (cleanup):
11570 - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
11571 when it stops. Closes ticket 23271.
11573 o Minor features (defensive programming):
11574 - Most of the functions in Tor that free objects have been replaced
11575 with macros that free the objects and set the corresponding
11576 pointers to NULL. This change should help prevent a large class of
11577 dangling pointer bugs. Closes ticket 24337.
11578 - Where possible, the tor_free() macro now only evaluates its input
11579 once. Part of ticket 24337.
11580 - Check that microdesc ed25519 ids are non-zero in
11581 node_get_ed25519_id() before returning them. Implements ticket
11582 24001, patch by "aruna1234".
11584 o Minor features (embedding):
11585 - Tor can now start with a preauthenticated control connection
11586 created by the process that launched it. This feature is meant for
11587 use by programs that want to launch and manage a Tor process
11588 without allowing other programs to manage it as well. For more
11589 information, see the __OwningControllerFD option documented in
11590 control-spec.txt. Closes ticket 23900.
11591 - On most errors that would cause Tor to exit, it now tries to
11592 return from the tor_main() function, rather than calling the
11593 system exit() function. Most users won't notice a difference here,
11594 but it should be significant for programs that run Tor inside
11595 a separate thread: they should now be able to survive Tor's exit
11596 conditions rather than having Tor shut down the entire process.
11597 Closes ticket 23848.
11598 - Applications that want to embed Tor can now tell Tor not to
11599 register any of its own POSIX signal handlers, using the
11600 __DisableSignalHandlers option. Closes ticket 24588.
11602 o Minor features (fallback directory list):
11603 - Avoid selecting fallbacks that change their IP addresses too
11604 often. Select more fallbacks by ignoring the Guard flag, and
11605 allowing lower cutoffs for the Running and V2Dir flags. Also allow
11606 a lower bandwidth, and a higher number of fallbacks per operator
11607 (5% of the list). Implements ticket 24785.
11608 - Update the fallback whitelist and blacklist based on opt-ins and
11609 relay changes. Closes tickets 22321, 24678, 22527, 24135,
11612 o Minor features (fallback directory mirror configuration):
11613 - Add a nickname to each fallback in a C comment. This makes it
11614 easier for operators to find their relays, and allows stem to use
11615 nicknames to identify fallbacks. Implements ticket 24600.
11616 - Add a type and version header to the fallback directory mirror
11617 file. Also add a delimiter to the end of each fallback entry. This
11618 helps external parsers like stem and Relay Search. Implements
11620 - Add an extrainfo cache flag for each fallback in a C comment. This
11621 allows stem to use fallbacks to fetch extra-info documents, rather
11622 than using authorities. Implements ticket 22759.
11623 - Add the generateFallbackDirLine.py script for automatically
11624 generating fallback directory mirror lines from relay fingerprints.
11625 No more typos! Add the lookupFallbackDirContact.py script for
11626 automatically looking up operator contact info from relay
11627 fingerprints. Implements ticket 24706, patch by teor and atagar.
11628 - Reject any fallback directory mirror that serves an expired
11629 consensus. Implements ticket 20942, patch by "minik".
11630 - Remove commas and equals signs from external string inputs to the
11631 fallback list. This avoids format confusion attacks. Implements
11633 - Remove the "weight=10" line from fallback directory mirror
11634 entries. Ticket 24681 will maintain the current fallback weights
11635 by changing Tor's default fallback weight to 10. Implements
11637 - Stop logging excessive information about fallback netblocks.
11638 Implements ticket 24791.
11640 o Minor features (forward-compatibility):
11641 - If a relay supports some link authentication protocol that we do
11642 not recognize, then include that relay's ed25519 key when telling
11643 other relays to extend to it. Previously, we treated future
11644 versions as if they were too old to support ed25519 link
11645 authentication. Closes ticket 20895.
11647 o Minor features (heartbeat):
11648 - Add onion service information to our heartbeat logs, displaying
11649 stats about the activity of configured onion services. Closes
11652 o Minor features (instrumentation, development):
11653 - Add the MainloopStats option to allow developers to get
11654 instrumentation information from the main event loop via the
11655 heartbeat messages. We hope to use this to improve Tor's behavior
11656 when it's trying to sleep. Closes ticket 24605.
11658 o Minor features (log messages):
11659 - Improve a warning message that happens when we fail to re-parse an
11660 old router because of an expired certificate. Closes ticket 20020.
11661 - Make the log more quantitative when we hit MaxMemInQueues
11662 threshold exposing some values. Closes ticket 24501.
11664 o Minor features (logging, android):
11665 - Added support for the Android logging subsystem. Closes
11668 o Minor features (performance):
11669 - Support predictive circuit building for onion service circuits
11670 with multiple layers of guards. Closes ticket 23101.
11671 - Use stdatomic.h where available, rather than mutexes, to implement
11672 atomic_counter_t. Closes ticket 23953.
11674 o Minor features (performance, 32-bit):
11675 - Improve performance on 32-bit systems by avoiding 64-bit division
11676 when calculating the timestamp in milliseconds for channel padding
11677 computations. Implements ticket 24613.
11678 - Improve performance on 32-bit systems by avoiding 64-bit division
11679 when timestamping cells and buffer chunks for OOM calculations.
11680 Implements ticket 24374.
11682 o Minor features (performance, OSX, iOS):
11683 - Use the mach_approximate_time() function (when available) to
11684 implement coarse monotonic time. Having a coarse time function
11685 should avoid a large number of system calls, and improve
11686 performance slightly, especially under load. Closes ticket 24427.
11688 o Minor features (performance, windows):
11689 - Improve performance on Windows Vista and Windows 7 by adjusting
11690 TCP send window size according to the recommendation from
11691 SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
11694 o Major features (relay):
11695 - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
11696 operator to use a more reasonable ("reduced") exit policy, rather
11697 than the default one. If you want to run an exit node without
11698 thinking too hard about which ports to allow, this one is for you.
11699 Closes ticket 13605. Patch from Neel Chauhan.
11701 o Minor features (testing, debugging, embedding):
11702 - For development purposes, Tor now has a mode in which it runs for
11703 a few seconds, then stops, and starts again without exiting the
11704 process. This mode is meant to help us debug various issues with
11705 ticket 23847. To use this feature, compile with
11706 --enable-restart-debugging, and set the TOR_DEBUG_RESTART
11707 environment variable. This is expected to crash a lot, and is
11708 really meant for developers only. It will likely be removed in a
11709 future release. Implements ticket 24583.
11711 o Minor bugfix (network IPv6 test):
11712 - Tor's test scripts now check if "ping -6 ::1" works when the user
11713 runs "make test-network-all". Fixes bug 24677; bugfix on
11714 0.2.9.3-alpha. Patch by "ffmancera".
11716 o Minor bugfixes (build, rust):
11717 - Fix output of autoconf checks to display success messages for Rust
11718 dependencies and a suitable rustc compiler version. Fixes bug
11719 24612; bugfix on 0.3.1.3-alpha.
11720 - When building with Rust on OSX, link against libresolv, to work
11721 around the issue at https://github.com/rust-lang/rust/issues/46797.
11722 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
11723 - Don't pass the --quiet option to cargo: it seems to suppress some
11724 errors, which is not what we want to do when building. Fixes bug
11725 24518; bugfix on 0.3.1.7.
11726 - Build correctly when building from outside Tor's source tree with
11727 the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
11730 o Minor bugfixes (directory authorities, IPv6):
11731 - When creating a routerstatus (vote) from a routerinfo (descriptor),
11732 set the IPv6 address to the unspecified IPv6 address, and
11733 explicitly initialize the port to zero. Fixes bug 24488; bugfix
11736 o Minor bugfixes (fallback directory mirrors):
11737 - Make updateFallbackDirs.py search harder for python. (Some OSs
11738 don't put it in /usr/bin.) Fixes bug 24708; bugfix
11741 o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
11742 - When hibernating, close connections normally and allow them to
11743 flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
11745 - Do not attempt to launch self-reachability tests when entering
11746 hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
11747 - Resolve several bugs related to descriptor fetching on bridge
11748 clients with bandwidth accounting enabled. (This combination is
11749 not recommended!) Fixes a case of bug 12062; bugfix
11751 - When hibernating, do not attempt to launch DNS checks. Fixes a
11752 case of bug 12062; bugfix on 0.1.2.2-alpha.
11753 - When hibernating, do not try to upload or download descriptors.
11754 Fixes a case of bug 12062; bugfix on 0.0.9pre5.
11756 o Minor bugfixes (IPv6, bridges):
11757 - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
11758 bugfix on 0.2.8.2-alpha.
11759 - Tor now sets IPv6 address in the routerstatus as well as in the
11760 router descriptors when updating addresses for a bridge. Closes
11761 ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
11763 o Minor bugfixes (linux seccomp2 sandbox):
11764 - When running with the sandbox enabled, reload configuration files
11765 correctly even when %include was used. Previously we would crash.
11766 Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
11768 o Minor bugfixes (memory leaks):
11769 - Avoid possible at-exit memory leaks related to use of Libevent's
11770 event_base_once() function. (This function tends to leak memory if
11771 the event_base is closed before the event fires.) Fixes bug 24584;
11772 bugfix on 0.2.8.1-alpha.
11773 - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
11776 o Minor bugfixes (OSX):
11777 - Don't exit the Tor process if setrlimit() fails to change the file
11778 limit (which can happen sometimes on some versions of OSX). Fixes
11779 bug 21074; bugfix on 0.0.9pre5.
11781 o Minor bugfixes (performance, fragile-hardening):
11782 - Improve the performance of our consensus-diff application code
11783 when Tor is built with the --enable-fragile-hardening option set.
11784 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
11786 o Minor bugfixes (performance, timeouts):
11787 - Consider circuits for timeout as soon as they complete a hop. This
11788 is more accurate than applying the timeout in
11789 circuit_expire_building() because that function is only called
11790 once per second, which is now too slow for typical timeouts on the
11791 current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
11792 - Use onion service circuits (and other circuits longer than 3 hops)
11793 to calculate a circuit build timeout. Previously, Tor only
11794 calculated its build timeout based on circuits that planned to be
11795 exactly 3 hops long. With this change, we include measurements
11796 from all circuits at the point where they complete their third
11797 hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
11799 o Minor bugfixes (testing):
11800 - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
11801 bugfix on 0.2.3.1-alpha.
11802 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
11803 25005; bugfix on 0.3.2.7-rc.
11805 o Code simplification and refactoring:
11806 - Remove /usr/athena from search path in configure.ac. Closes
11808 - Remove duplicate code in node_has_curve25519_onion_key() and
11809 node_get_curve25519_onion_key(), and add a check for a zero
11810 microdesc curve25519 onion key. Closes ticket 23966, patch by
11811 "aruna1234" and teor.
11812 - Rewrite channel_rsa_id_group_set_badness to reduce temporary
11813 memory allocations with large numbers of OR connections (e.g.
11814 relays). Closes ticket 24119.
11815 - Separate the function that deletes ephemeral files when Tor
11817 - Small changes to Tor's buf_t API to make it suitable for use as a
11818 general-purpose safe string constructor. Closes ticket 22342.
11819 - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
11820 avoid source code identifier confusion. Closes ticket 24467.
11821 - The tor_git_revision[] constant no longer needs to be redeclared
11822 by everything that links against the rest of Tor. Done as part of
11823 ticket 23845, to simplify our external API.
11824 - We make extend_info_from_node() use node_get_curve25519_onion_key()
11825 introduced in ticket 23577 to access the curve25519 public keys
11826 rather than accessing it directly. Closes ticket 23760. Patch by
11828 - Add a function to log channels' scheduler state changes to aid
11829 debugging efforts. Closes ticket 24531.
11832 - Add documentation on how to build tor with Rust dependencies
11833 without having to be online. Closes ticket 22907; bugfix
11835 - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
11836 traffic. Closes ticket 24318.
11837 - Document that OutboundBindAddress doesn't apply to DNS requests.
11838 Closes ticket 22145. Patch from Aruna Maurya.
11839 - Document that operators who run more than one relay or bridge are
11840 expected to set MyFamily and ContactInfo correctly. Closes
11843 o Code simplification and refactoring (channels):
11844 - Remove the incoming and outgoing channel queues. These were never
11845 used, but still took up a step in our fast path.
11846 - The majority of the channel unit tests have been rewritten and the
11847 code coverage has now been raised to 83.6% for channel.c. Closes
11849 - Remove other dead code from the channel subsystem: All together,
11850 this cleanup has removed more than 1500 lines of code overall and
11851 adding very little except for unit test.
11853 o Code simplification and refactoring (circuit rendezvous):
11854 - Split the client-side rendezvous circuit lookup into two
11855 functions: one that returns only established circuits and another
11856 that returns all kinds of circuits. Closes ticket 23459.
11858 o Code simplification and refactoring (controller):
11859 - Make most of the variables in networkstatus_getinfo_by_purpose()
11860 const. Implements ticket 24489.
11863 Changes in version 0.3.2.9 - 2018-01-09
11864 Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
11866 The 0.3.2 series includes our long-anticipated new onion service
11867 design, with numerous security features. (For more information, see
11868 our blog post at https://blog.torproject.org/fall-harvest.) We also
11869 have a new circuit scheduler algorithm for improved performance on
11870 relays everywhere (see https://blog.torproject.org/kist-and-tell),
11871 along with many smaller features and bugfixes.
11873 Per our stable release policy, we plan to support each stable release
11874 series for at least the next nine months, or for three months after
11875 the first stable release of the next series: whichever is longer. If
11876 you need a release with long-term support, we recommend that you stay
11877 with the 0.2.9 series.
11879 Below is a list of the changes since 0.3.2.8-rc. For a list of all
11880 changes since 0.3.1, see the ReleaseNotes file.
11882 o Minor features (fallback directory mirrors):
11883 - The fallback directory list has been re-generated based on the
11884 current status of the network. Tor uses fallback directories to
11885 bootstrap when it doesn't yet have up-to-date directory
11886 information. Closes ticket 24801.
11887 - Make the default DirAuthorityFallbackRate 0.1, so that clients
11888 prefer to bootstrap from fallback directory mirrors. This is a
11889 follow-up to 24679, which removed weights from the default
11890 fallbacks. Implements ticket 24681.
11892 o Minor features (geoip):
11893 - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
11896 o Minor bugfixes (address selection):
11897 - When the fascist_firewall_choose_address_ functions don't find a
11898 reachable address, set the returned address to the null address
11899 and port. This is a precautionary measure, because some callers do
11900 not check the return value. Fixes bug 24736; bugfix
11903 o Minor bugfixes (compilation):
11904 - Resolve a few shadowed-variable warnings in the onion service
11905 code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
11907 o Minor bugfixes (portability, msvc):
11908 - Fix a bug in the bit-counting parts of our timing-wheel code on
11909 MSVC. (Note that MSVC is still not a supported build platform, due
11910 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
11914 Changes in version 0.3.2.8-rc - 2017-12-21
11915 Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
11916 schedulers that had led servers under heavy load to overload their
11917 outgoing connections. All relay operators running earlier 0.3.2.x
11918 versions should upgrade. This version also includes a mitigation for
11919 over-full DESTROY queues leading to out-of-memory conditions: if it
11920 works, we will soon backport it to earlier release series.
11922 This is the second release candidate in the 0.3.2 series. If we find
11923 no new bugs or regression here, then the first stable 0.3.2 release
11924 will be nearly identical to this.
11926 o Major bugfixes (KIST, scheduler):
11927 - The KIST scheduler did not correctly account for data already
11928 enqueued in each connection's send socket buffer, particularly in
11929 cases when the TCP/IP congestion window was reduced between
11930 scheduler calls. This situation lead to excessive per-connection
11931 buffering in the kernel, and a potential memory DoS. Fixes bug
11932 24665; bugfix on 0.3.2.1-alpha.
11934 o Minor features (geoip):
11935 - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
11938 o Minor bugfixes (hidden service v3):
11939 - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
11940 the probability of reaching a service for a client missing
11941 microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
11943 o Minor bugfixes (memory usage):
11944 - When queuing DESTROY cells on a channel, only queue the circuit-id
11945 and reason fields: not the entire 514-byte cell. This fix should
11946 help mitigate any bugs or attacks that fill up these queues, and
11947 free more RAM for other uses. Fixes bug 24666; bugfix
11950 o Minor bugfixes (scheduler, KIST):
11951 - Use a sane write limit for KISTLite when writing onto a connection
11952 buffer instead of using INT_MAX and shoving as much as it can.
11953 Because the OOM handler cleans up circuit queues, we are better
11954 off at keeping them in that queue instead of the connection's
11955 buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
11958 Changes in version 0.3.2.7-rc - 2017-12-14
11959 Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
11960 including some that could affect reliability or correctness.
11962 This is the first release candidate in the 0.3.2 series. If we find no
11963 new bugs or regression here, then the first stable 0.3.2. release will
11964 be nearly identical to this.
11966 o Major bugfixes (circuit prediction):
11967 - Fix circuit prediction logic so that a client doesn't treat a port
11968 as being "handled" by a circuit if that circuit already has
11969 isolation settings on it. This change should make Tor clients more
11970 responsive by improving their chances of having a pre-created
11971 circuit ready for use when a request arrives. Fixes bug 18859;
11972 bugfix on 0.2.3.3-alpha.
11974 o Minor features (logging):
11975 - Provide better warnings when the getrandom() syscall fails. Closes
11978 o Minor features (portability):
11979 - Tor now compiles correctly on arm64 with libseccomp-dev installed.
11980 (It doesn't yet work with the sandbox enabled.) Closes
11983 o Minor bugfixes (bridge clients, bootstrap):
11984 - Retry directory downloads when we get our first bridge descriptor
11985 during bootstrap or while reconnecting to the network. Keep
11986 retrying every time we get a bridge descriptor, until we have a
11987 reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
11988 - Stop delaying bridge descriptor fetches when we have cached bridge
11989 descriptors. Instead, only delay bridge descriptor fetches when we
11990 have at least one reachable bridge. Fixes part of bug 24367;
11991 bugfix on 0.2.0.3-alpha.
11992 - Stop delaying directory fetches when we have cached bridge
11993 descriptors. Instead, only delay bridge descriptor fetches when
11994 all our bridges are definitely unreachable. Fixes part of bug
11995 24367; bugfix on 0.2.0.3-alpha.
11997 o Minor bugfixes (compilation):
11998 - Fix a signed/unsigned comparison warning introduced by our fix to
11999 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
12001 o Minor bugfixes (correctness):
12002 - Fix several places in our codebase where a C compiler would be
12003 likely to eliminate a check, based on assuming that undefined
12004 behavior had not happened elsewhere in the code. These cases are
12005 usually a sign of redundant checking or dubious arithmetic. Found
12006 by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
12007 Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
12010 o Minor bugfixes (onion service v3):
12011 - Fix a race where an onion service would launch a new intro circuit
12012 after closing an old one, but fail to register it before freeing
12013 the previously closed circuit. This bug was making the service
12014 unable to find the established intro circuit and thus not upload
12015 its descriptor, thus making a service unavailable for up to 24
12016 hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
12018 o Minor bugfixes (scheduler, KIST):
12019 - Properly set the scheduler state of an unopened channel in the
12020 KIST scheduler main loop. This prevents a harmless but annoying
12021 log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
12022 - Avoid a possible integer overflow when computing the available
12023 space on the TCP buffer of a channel. This had no security
12024 implications; but could make KIST allow too many cells on a
12025 saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
12026 - Downgrade to "info" a harmless warning about the monotonic time
12027 moving backwards: This can happen on platform not supporting
12028 monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
12031 Changes in version 0.3.2.6-alpha - 2017-12-01
12032 This version of Tor is the latest in the 0.3.2 alpha series. It
12033 includes fixes for several important security issues. All Tor users
12034 should upgrade to this release, or to one of the other releases coming
12037 o Major bugfixes (security):
12038 - Fix a denial of service bug where an attacker could use a
12039 malformed directory object to cause a Tor instance to pause while
12040 OpenSSL would try to read a passphrase from the terminal. (Tor
12041 instances run without a terminal, which is the case for most Tor
12042 packages, are not impacted.) Fixes bug 24246; bugfix on every
12043 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12044 Found by OSS-Fuzz as testcase 6360145429790720.
12045 - Fix a denial of service issue where an attacker could crash a
12046 directory authority using a malformed router descriptor. Fixes bug
12047 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
12049 - When checking for replays in the INTRODUCE1 cell data for a
12050 (legacy) onion service, correctly detect replays in the RSA-
12051 encrypted part of the cell. We were previously checking for
12052 replays on the entire cell, but those can be circumvented due to
12053 the malleability of Tor's legacy hybrid encryption. This fix helps
12054 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12055 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12058 o Major bugfixes (security, onion service v2):
12059 - Fix a use-after-free error that could crash v2 Tor onion services
12060 when they failed to open circuits while expiring introduction
12061 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12062 also tracked as TROVE-2017-013 and CVE-2017-8823.
12064 o Major bugfixes (security, relay):
12065 - When running as a relay, make sure that we never build a path
12066 through ourselves, even in the case where we have somehow lost the
12067 version of our descriptor appearing in the consensus. Fixes part
12068 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12069 as TROVE-2017-012 and CVE-2017-8822.
12070 - When running as a relay, make sure that we never choose ourselves
12071 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
12072 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
12074 o Minor feature (relay statistics):
12075 - Change relay bandwidth reporting stats interval from 4 hours to 24
12076 hours in order to reduce the efficiency of guard discovery
12077 attacks. Fixes ticket 23856.
12079 o Minor features (directory authority):
12080 - Add an IPv6 address for the "bastet" directory authority. Closes
12083 o Minor bugfixes (client):
12084 - By default, do not enable storage of client-side DNS values. These
12085 values were unused by default previously, but they should not have
12086 been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
12089 Changes in version 0.3.1.9 - 2017-12-01:
12090 Tor 0.3.1.9 backports important security and stability fixes from the
12091 0.3.2 development series. All Tor users should upgrade to this
12092 release, or to another of the releases coming out today.
12094 o Major bugfixes (security, backport from 0.3.2.6-alpha):
12095 - Fix a denial of service bug where an attacker could use a
12096 malformed directory object to cause a Tor instance to pause while
12097 OpenSSL would try to read a passphrase from the terminal. (Tor
12098 instances run without a terminal, which is the case for most Tor
12099 packages, are not impacted.) Fixes bug 24246; bugfix on every
12100 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12101 Found by OSS-Fuzz as testcase 6360145429790720.
12102 - Fix a denial of service issue where an attacker could crash a
12103 directory authority using a malformed router descriptor. Fixes bug
12104 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
12106 - When checking for replays in the INTRODUCE1 cell data for a
12107 (legacy) onion service, correctly detect replays in the RSA-
12108 encrypted part of the cell. We were previously checking for
12109 replays on the entire cell, but those can be circumvented due to
12110 the malleability of Tor's legacy hybrid encryption. This fix helps
12111 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12112 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12115 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
12116 - Fix a use-after-free error that could crash v2 Tor onion services
12117 when they failed to open circuits while expiring introduction
12118 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12119 also tracked as TROVE-2017-013 and CVE-2017-8823.
12121 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
12122 - When running as a relay, make sure that we never build a path
12123 through ourselves, even in the case where we have somehow lost the
12124 version of our descriptor appearing in the consensus. Fixes part
12125 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12126 as TROVE-2017-012 and CVE-2017-8822.
12127 - When running as a relay, make sure that we never choose ourselves
12128 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
12129 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
12131 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
12132 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
12133 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
12134 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
12135 identifying and finding a workaround to this bug and to Moritz,
12136 Arthur Edelstein, and Roger for helping to track it down and
12139 o Minor features (bridge):
12140 - Bridges now include notice in their descriptors that they are
12141 bridges, and notice of their distribution status, based on their
12142 publication settings. Implements ticket 18329. For more fine-
12143 grained control of how a bridge is distributed, upgrade to 0.3.2.x
12146 o Minor features (directory authority, backport from 0.3.2.6-alpha):
12147 - Add an IPv6 address for the "bastet" directory authority. Closes
12150 o Minor features (geoip):
12151 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12154 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
12155 - Avoid unnecessary calls to directory_fetches_from_authorities() on
12156 relays, to prevent spurious address resolutions and descriptor
12157 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
12158 bugfix on in 0.2.8.1-alpha.
12160 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
12161 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
12162 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
12164 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
12165 - When a circuit is marked for close, do not attempt to package any
12166 cells for channels on that circuit. Previously, we would detect
12167 this condition lower in the call stack, when we noticed that the
12168 circuit had no attached channel, and log an annoying message.
12169 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
12171 o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
12172 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
12173 so it matches dir-spec.txt. Fixes bug 24262; bugfix
12176 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
12177 - Avoid a crash when transitioning from client mode to bridge mode.
12178 Previously, we would launch the worker threads whenever our
12179 "public server" mode changed, but not when our "server" mode
12180 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
12183 Changes in version 0.3.0.13 - 2017-12-01
12184 Tor 0.3.0.13 backports important security and stability bugfixes from
12185 later Tor releases. All Tor users should upgrade to this release, or
12186 to another of the releases coming out today.
12188 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
12189 2018. If you need a release with long-term support, please stick with
12190 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12192 o Major bugfixes (security, backport from 0.3.2.6-alpha):
12193 - Fix a denial of service bug where an attacker could use a
12194 malformed directory object to cause a Tor instance to pause while
12195 OpenSSL would try to read a passphrase from the terminal. (Tor
12196 instances run without a terminal, which is the case for most Tor
12197 packages, are not impacted.) Fixes bug 24246; bugfix on every
12198 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12199 Found by OSS-Fuzz as testcase 6360145429790720.
12200 - Fix a denial of service issue where an attacker could crash a
12201 directory authority using a malformed router descriptor. Fixes bug
12202 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
12204 - When checking for replays in the INTRODUCE1 cell data for a
12205 (legacy) onion service, correctly detect replays in the RSA-
12206 encrypted part of the cell. We were previously checking for
12207 replays on the entire cell, but those can be circumvented due to
12208 the malleability of Tor's legacy hybrid encryption. This fix helps
12209 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12210 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12213 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
12214 - Fix a use-after-free error that could crash v2 Tor onion services
12215 when they failed to open circuits while expiring introduction
12216 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12217 also tracked as TROVE-2017-013 and CVE-2017-8823.
12219 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
12220 - When running as a relay, make sure that we never build a path
12221 through ourselves, even in the case where we have somehow lost the
12222 version of our descriptor appearing in the consensus. Fixes part
12223 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12224 as TROVE-2017-012 and CVE-2017-8822.
12225 - When running as a relay, make sure that we never choose ourselves
12226 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
12227 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
12229 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
12230 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
12231 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
12232 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
12233 identifying and finding a workaround to this bug and to Moritz,
12234 Arthur Edelstein, and Roger for helping to track it down and
12237 o Minor features (security, windows, backport from 0.3.1.1-alpha):
12238 - Enable a couple of pieces of Windows hardening: one
12239 (HeapEnableTerminationOnCorruption) that has been on-by-default
12240 since Windows 8, and unavailable before Windows 7; and one
12241 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
12242 affect us, but shouldn't do any harm. Closes ticket 21953.
12244 o Minor features (bridge, backport from 0.3.1.9):
12245 - Bridges now include notice in their descriptors that they are
12246 bridges, and notice of their distribution status, based on their
12247 publication settings. Implements ticket 18329. For more fine-
12248 grained control of how a bridge is distributed, upgrade to 0.3.2.x
12251 o Minor features (directory authority, backport from 0.3.2.6-alpha):
12252 - Add an IPv6 address for the "bastet" directory authority. Closes
12255 o Minor features (geoip):
12256 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12259 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
12260 - Avoid unnecessary calls to directory_fetches_from_authorities() on
12261 relays, to prevent spurious address resolutions and descriptor
12262 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
12263 bugfix on in 0.2.8.1-alpha.
12265 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
12266 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
12267 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
12269 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
12270 - When a circuit is marked for close, do not attempt to package any
12271 cells for channels on that circuit. Previously, we would detect
12272 this condition lower in the call stack, when we noticed that the
12273 circuit had no attached channel, and log an annoying message.
12274 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
12276 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
12277 - Avoid a crash when transitioning from client mode to bridge mode.
12278 Previously, we would launch the worker threads whenever our
12279 "public server" mode changed, but not when our "server" mode
12280 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
12282 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
12283 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
12284 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
12287 Changes in version 0.2.9.14 - 2017-12-01
12288 Tor 0.3.0.13 backports important security and stability bugfixes from
12289 later Tor releases. All Tor users should upgrade to this release, or
12290 to another of the releases coming out today.
12292 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
12293 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
12294 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
12295 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
12296 identifying and finding a workaround to this bug and to Moritz,
12297 Arthur Edelstein, and Roger for helping to track it down and
12300 o Major bugfixes (security, backport from 0.3.2.6-alpha):
12301 - Fix a denial of service bug where an attacker could use a
12302 malformed directory object to cause a Tor instance to pause while
12303 OpenSSL would try to read a passphrase from the terminal. (Tor
12304 instances run without a terminal, which is the case for most Tor
12305 packages, are not impacted.) Fixes bug 24246; bugfix on every
12306 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12307 Found by OSS-Fuzz as testcase 6360145429790720.
12308 - Fix a denial of service issue where an attacker could crash a
12309 directory authority using a malformed router descriptor. Fixes bug
12310 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
12312 - When checking for replays in the INTRODUCE1 cell data for a
12313 (legacy) onion service, correctly detect replays in the RSA-
12314 encrypted part of the cell. We were previously checking for
12315 replays on the entire cell, but those can be circumvented due to
12316 the malleability of Tor's legacy hybrid encryption. This fix helps
12317 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12318 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12321 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
12322 - Fix a use-after-free error that could crash v2 Tor onion services
12323 when they failed to open circuits while expiring introduction
12324 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12325 also tracked as TROVE-2017-013 and CVE-2017-8823.
12327 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
12328 - When running as a relay, make sure that we never build a path
12329 through ourselves, even in the case where we have somehow lost the
12330 version of our descriptor appearing in the consensus. Fixes part
12331 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12332 as TROVE-2017-012 and CVE-2017-8822.
12334 o Minor features (bridge, backport from 0.3.1.9):
12335 - Bridges now include notice in their descriptors that they are
12336 bridges, and notice of their distribution status, based on their
12337 publication settings. Implements ticket 18329. For more fine-
12338 grained control of how a bridge is distributed, upgrade to 0.3.2.x
12341 o Minor features (directory authority, backport from 0.3.2.6-alpha):
12342 - Add an IPv6 address for the "bastet" directory authority. Closes
12345 o Minor features (geoip):
12346 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12349 o Minor features (security, windows, backport from 0.3.1.1-alpha):
12350 - Enable a couple of pieces of Windows hardening: one
12351 (HeapEnableTerminationOnCorruption) that has been on-by-default
12352 since Windows 8, and unavailable before Windows 7; and one
12353 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
12354 affect us, but shouldn't do any harm. Closes ticket 21953.
12356 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
12357 - Avoid unnecessary calls to directory_fetches_from_authorities() on
12358 relays, to prevent spurious address resolutions and descriptor
12359 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
12360 bugfix on in 0.2.8.1-alpha.
12362 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
12363 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
12364 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
12366 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
12367 - When a circuit is marked for close, do not attempt to package any
12368 cells for channels on that circuit. Previously, we would detect
12369 this condition lower in the call stack, when we noticed that the
12370 circuit had no attached channel, and log an annoying message.
12371 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
12373 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
12374 - Avoid a crash when transitioning from client mode to bridge mode.
12375 Previously, we would launch the worker threads whenever our
12376 "public server" mode changed, but not when our "server" mode
12377 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
12379 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
12380 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
12381 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
12384 Changes in version 0.2.8.17 - 2017-12-01
12385 Tor 0.2.8.17 backports important security and stability bugfixes from
12386 later Tor releases. All Tor users should upgrade to this release, or
12387 to another of the releases coming out today.
12389 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
12390 2018. If you need a release with long-term support, please upgrade with
12391 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12393 o Major bugfixes (security, backport from 0.3.2.6-alpha):
12394 - Fix a denial of service bug where an attacker could use a
12395 malformed directory object to cause a Tor instance to pause while
12396 OpenSSL would try to read a passphrase from the terminal. (Tor
12397 instances run without a terminal, which is the case for most Tor
12398 packages, are not impacted.) Fixes bug 24246; bugfix on every
12399 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12400 Found by OSS-Fuzz as testcase 6360145429790720.
12401 - When checking for replays in the INTRODUCE1 cell data for a
12402 (legacy) onion service, correctly detect replays in the RSA-
12403 encrypted part of the cell. We were previously checking for
12404 replays on the entire cell, but those can be circumvented due to
12405 the malleability of Tor's legacy hybrid encryption. This fix helps
12406 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12407 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12410 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
12411 - Fix a use-after-free error that could crash v2 Tor onion services
12412 when they failed to open circuits while expiring introduction
12413 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12414 also tracked as TROVE-2017-013 and CVE-2017-8823.
12416 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
12417 - When running as a relay, make sure that we never build a path through
12418 ourselves, even in the case where we have somehow lost the version of
12419 our descriptor appearing in the consensus. Fixes part of bug 21534;
12420 bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
12423 o Minor features (bridge, backport from 0.3.1.9):
12424 - Bridges now include notice in their descriptors that they are
12425 bridges, and notice of their distribution status, based on their
12426 publication settings. Implements ticket 18329. For more fine-
12427 grained control of how a bridge is distributed, upgrade to 0.3.2.x
12430 o Minor features (directory authority, backport from 0.3.2.6-alpha):
12431 - Add an IPv6 address for the "bastet" directory authority. Closes
12434 o Minor features (geoip):
12435 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12438 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
12439 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
12440 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
12443 Changes in version 0.2.5.16 - 2017-12-01
12444 Tor 0.2.5.13 backports important security and stability bugfixes from
12445 later Tor releases. All Tor users should upgrade to this release, or
12446 to another of the releases coming out today.
12448 Note: the Tor 0.2.5 series will no longer be supported after 1 May
12449 2018. If you need a release with long-term support, please upgrade to
12450 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12452 o Major bugfixes (security, backport from 0.3.2.6-alpha):
12453 - Fix a denial of service bug where an attacker could use a
12454 malformed directory object to cause a Tor instance to pause while
12455 OpenSSL would try to read a passphrase from the terminal. (Tor
12456 instances run without a terminal, which is the case for most Tor
12457 packages, are not impacted.) Fixes bug 24246; bugfix on every
12458 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12459 Found by OSS-Fuzz as testcase 6360145429790720.
12460 - When checking for replays in the INTRODUCE1 cell data for a
12461 (legacy) onion service, correctly detect replays in the RSA-
12462 encrypted part of the cell. We were previously checking for
12463 replays on the entire cell, but those can be circumvented due to
12464 the malleability of Tor's legacy hybrid encryption. This fix helps
12465 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12466 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12469 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
12470 - When running as a relay, make sure that we never build a path
12471 through ourselves, even in the case where we have somehow lost the
12472 version of our descriptor appearing in the consensus. Fixes part
12473 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12474 as TROVE-2017-012 and CVE-2017-8822.
12476 o Minor features (bridge, backport from 0.3.1.9):
12477 - Bridges now include notice in their descriptors that they are
12478 bridges, and notice of their distribution status, based on their
12479 publication settings. Implements ticket 18329. For more fine-
12480 grained control of how a bridge is distributed, upgrade to 0.3.2.x
12483 o Minor features (geoip):
12484 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12488 Changes in version 0.3.2.5-alpha - 2017-11-22
12489 Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
12490 fixes several stability and reliability bugs, including a fix for
12491 intermittent bootstrapping failures that some people have been seeing
12492 since the 0.3.0.x series.
12494 Please test this alpha out -- many of these fixes will soon be
12495 backported to stable Tor versions if no additional bugs are found
12498 o Major bugfixes (bootstrapping):
12499 - Fetch descriptors aggressively whenever we lack enough to build
12500 circuits, regardless of how many descriptors we are missing.
12501 Previously, we would delay launching the fetch when we had fewer
12502 than 15 missing descriptors, even if some of those descriptors
12503 were blocking circuits from building. Fixes bug 23985; bugfix on
12504 0.1.1.11-alpha. The effects of this bug became worse in
12505 0.3.0.3-alpha, when we began treating missing descriptors from our
12506 primary guards as a reason to delay circuits.
12507 - Don't try fetching microdescriptors from relays that have failed
12508 to deliver them in the past. Fixes bug 23817; bugfix
12511 o Minor features (directory authority):
12512 - Make the "Exit" flag assignment only depend on whether the exit
12513 policy allows connections to ports 80 and 443. Previously relays
12514 would get the Exit flag if they allowed connections to one of
12515 these ports and also port 6667. Resolves ticket 23637.
12517 o Minor features (geoip):
12518 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12521 o Minor features (linux seccomp2 sandbox):
12522 - Update the sandbox rules so that they should now work correctly
12523 with Glibc 2.26. Closes ticket 24315.
12525 o Minor features (logging):
12526 - Downgrade a pair of log messages that could occur when an exit's
12527 resolver gave us an unusual (but not forbidden) response. Closes
12529 - Improve the message we log when re-enabling circuit build timeouts
12530 after having received a consensus. Closes ticket 20963.
12532 o Minor bugfixes (compilation):
12533 - Fix a memory leak warning in one of the libevent-related
12534 configuration tests that could occur when manually specifying
12535 -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
12536 Found and patched by Alex Xu.
12537 - When detecting OpenSSL on Windows from our configure script, make
12538 sure to try linking with the ws2_32 library. Fixes bug 23783;
12539 bugfix on 0.3.2.2-alpha.
12541 o Minor bugfixes (control port, linux seccomp2 sandbox):
12542 - Avoid a crash when attempting to use the seccomp2 sandbox together
12543 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
12546 o Minor bugfixes (control port, onion services):
12547 - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
12548 HS_DESC event when a service is not able to upload a descriptor.
12549 Fixes bug 24230; bugfix on 0.2.7.1-alpha.
12551 o Minor bugfixes (directory cache):
12552 - Recover better from empty or corrupt files in the consensus cache
12553 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
12554 - When a consensus diff calculation is only partially successful,
12555 only record the successful parts as having succeeded. Partial
12556 success can happen if (for example) one compression method fails
12557 but the others succeed. Previously we misrecorded all the
12558 calculations as having succeeded, which would later cause a
12559 nonfatal assertion failure. Fixes bug 24086; bugfix
12562 o Minor bugfixes (logging):
12563 - Only log once if we notice that KIST support is gone. Fixes bug
12564 24158; bugfix on 0.3.2.1-alpha.
12565 - Suppress a log notice when relay descriptors arrive. We already
12566 have a bootstrap progress for this so no need to log notice
12567 everytime tor receives relay descriptors. Microdescriptors behave
12568 the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
12570 o Minor bugfixes (network layer):
12571 - When closing a connection via close_connection_immediately(), we
12572 mark it as "not blocked on bandwidth", to prevent later calls from
12573 trying to unblock it, and give it permission to read. This fixes a
12574 backtrace warning that can happen on relays under various
12575 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
12577 o Minor bugfixes (onion services):
12578 - The introduction circuit was being timed out too quickly while
12579 waiting for the rendezvous circuit to complete. Keep the intro
12580 circuit around longer instead of timing out and reopening new ones
12581 constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
12582 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
12583 so it matches dir-spec.txt. Fixes bug 24262; bugfix
12585 - Silence a warning about failed v3 onion descriptor uploads that
12586 can happen naturally under certain edge cases. Fixes part of bug
12587 23662; bugfix on 0.3.2.1-alpha.
12589 o Minor bugfixes (tests):
12590 - Fix a memory leak in one of the bridge-distribution test cases.
12591 Fixes bug 24345; bugfix on 0.3.2.3-alpha.
12592 - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
12593 to correctly handle cases where a caller gives it an RSA key of
12594 under 160 bits. (This is not actually a bug in Tor itself, but
12595 rather in our fuzzing code.) Fixes bug 24247; bugfix on
12596 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
12599 - Add notes in man page regarding OS support for the various
12600 scheduler types. Attempt to use less jargon in the scheduler
12601 section. Closes ticket 24254.
12604 Changes in version 0.3.2.4-alpha - 2017-11-08
12605 Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
12606 It fixes several stability and reliability bugs, especially including
12607 a major reliability issue that has been plaguing fast exit relays in
12610 o Major bugfixes (exit relays, DNS):
12611 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
12612 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
12613 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
12614 identifying and finding a workaround to this bug and to Moritz,
12615 Arthur Edelstein, and Roger for helping to track it down and
12618 o Major bugfixes (scheduler, channel):
12619 - Stop processing scheduled channels if they closed while flushing
12620 cells. This can happen if the write on the connection fails
12621 leading to the channel being closed while in the scheduler loop.
12622 Fixes bug 23751; bugfix on 0.3.2.1-alpha.
12624 o Minor features (logging, scheduler):
12625 - Introduce a SCHED_BUG() function to log extra information about
12626 the scheduler state if we ever catch a bug in the scheduler.
12627 Closes ticket 23753.
12629 o Minor features (removed deprecations):
12630 - The ClientDNSRejectInternalAddresses flag can once again be set in
12631 non-testing Tor networks, so long as they do not use the default
12632 directory authorities. This change also removes the deprecation of
12633 this flag from 0.2.9.2-alpha. Closes ticket 21031.
12635 o Minor features (testing):
12636 - Our fuzzing tests now test the encrypted portions of v3 onion
12637 service descriptors. Implements more of 21509.
12639 o Minor bugfixes (directory client):
12640 - On failure to download directory information, delay retry attempts
12641 by a random amount based on the "decorrelated jitter" algorithm.
12642 Our previous delay algorithm tended to produce extra-long delays
12643 too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
12645 o Minor bugfixes (IPv6, v3 single onion services):
12646 - Remove buggy code for IPv6-only v3 single onion services, and
12647 reject attempts to configure them. This release supports IPv4,
12648 dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
12649 stack v3 single onion services. Fixes bug 23820; bugfix
12652 o Minor bugfixes (logging, relay):
12653 - Give only a protocol warning when the ed25519 key is not
12654 consistent between the descriptor and microdescriptor of a relay.
12655 This can happen, for instance, if the relay has been flagged
12656 NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
12658 o Minor bugfixes (manpage, onion service):
12659 - Document that the HiddenServiceNumIntroductionPoints option is
12660 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
12661 bugfix on 0.3.2.1-alpha.
12663 o Minor bugfixes (memory leaks):
12664 - Fix a minor memory leak at exit in the KIST scheduler. This bug
12665 should have no user-visible impact. Fixes bug 23774; bugfix
12667 - Fix a memory leak when decrypting a badly formatted v3 onion
12668 service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
12669 Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
12671 o Minor bugfixes (onion services):
12672 - Cache some needed onion service client information instead of
12673 constantly computing it over and over again. Fixes bug 23623;
12674 bugfix on 0.3.2.1-alpha.
12675 - Properly retry HSv3 descriptor fetches when missing required
12676 directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
12678 o Minor bugfixes (path selection):
12679 - When selecting relays by bandwidth, avoid a rounding error that
12680 could sometimes cause load to be imbalanced incorrectly.
12681 Previously, we would always round upwards; now, we round towards
12682 the nearest integer. This had the biggest effect when a relay's
12683 weight adjustments should have given it weight 0, but it got
12684 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
12685 - When calculating the fraction of nodes that have descriptors, and
12686 all nodes in the network have zero bandwidths, count the number of
12687 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
12688 - Actually log the total bandwidth in compute_weighted_bandwidths().
12689 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
12691 o Minor bugfixes (relay, crash):
12692 - Avoid a crash when transitioning from client mode to bridge mode.
12693 Previously, we would launch the worker threads whenever our
12694 "public server" mode changed, but not when our "server" mode
12695 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
12697 o Minor bugfixes (testing):
12698 - Fix a spurious fuzzing-only use of an uninitialized value. Found
12699 by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
12700 - Test that IPv6-only clients can use microdescriptors when running
12701 "make test-network-all". Requires chutney master 61c28b9 or later.
12702 Closes ticket 24109.
12705 Changes in version 0.3.2.3-alpha - 2017-10-27
12706 Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
12707 numerous small bugs in earlier versions of 0.3.2.x, and adds a new
12708 directory authority, Bastet.
12710 o Directory authority changes:
12711 - Add "Bastet" as a ninth directory authority to the default list.
12712 Closes ticket 23910.
12713 - The directory authority "Longclaw" has changed its IP address.
12714 Closes ticket 23592.
12716 o Minor features (bridge):
12717 - Bridge relays can now set the BridgeDistribution config option to
12718 add a "bridge-distribution-request" line to their bridge
12719 descriptor, which tells BridgeDB how they'd like their bridge
12720 address to be given out. (Note that as of Oct 2017, BridgeDB does
12721 not yet implement this feature.) As a side benefit, this feature
12722 provides a way to distinguish bridge descriptors from non-bridge
12723 descriptors. Implements tickets 18329.
12725 o Minor features (client, entry guards):
12726 - Improve log messages when missing descriptors for primary guards.
12727 Resolves ticket 23670.
12729 o Minor features (geoip):
12730 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12733 o Minor bugfixes (bridge):
12734 - Overwrite the bridge address earlier in the process of retrieving
12735 its descriptor, to make sure we reach it on the configured
12736 address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
12738 o Minor bugfixes (documentation):
12739 - Document better how to read gcov, and what our gcov postprocessing
12740 scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
12742 o Minor bugfixes (entry guards):
12743 - Tor now updates its guard state when it reads a consensus
12744 regardless of whether it's missing descriptors. That makes tor use
12745 its primary guards to fetch descriptors in some edge cases where
12746 it would previously have used fallback directories. Fixes bug
12747 23862; bugfix on 0.3.0.1-alpha.
12749 o Minor bugfixes (hidden service client):
12750 - When handling multiple SOCKS request for the same .onion address,
12751 only fetch the service descriptor once.
12752 - When a descriptor fetch fails with a non-recoverable error, close
12753 all pending SOCKS requests for that .onion. Fixes bug 23653;
12754 bugfix on 0.3.2.1-alpha.
12756 o Minor bugfixes (hidden service):
12757 - Always regenerate missing hidden service public key files. Prior
12758 to this, if the public key was deleted from disk, it wouldn't get
12759 recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
12761 - Make sure that we have a usable ed25519 key when the intro point
12762 relay supports ed25519 link authentication. Fixes bug 24002;
12763 bugfix on 0.3.2.1-alpha.
12765 o Minor bugfixes (hidden service, v2):
12766 - When reloading configured hidden services, copy all information
12767 from the old service object. Previously, some data was omitted,
12768 causing delays in descriptor upload, and other bugs. Fixes bug
12769 23790; bugfix on 0.2.1.9-alpha.
12771 o Minor bugfixes (memory safety, defensive programming):
12772 - Clear the target address when node_get_prim_orport() returns
12773 early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12775 o Minor bugfixes (relay):
12776 - Avoid a BUG warning when receiving a dubious CREATE cell while an
12777 option transition is in progress. Fixes bug 23952; bugfix
12780 o Minor bugfixes (testing):
12781 - Adjust the GitLab CI configuration to more closely match that of
12782 Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
12783 - Prevent scripts/test/coverage from attempting to move gcov output
12784 to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
12785 - When running unit tests as root, skip a test that would fail
12786 because it expects a permissions error. This affects some
12787 continuous integration setups. Fixes bug 23758; bugfix
12789 - Stop unconditionally mirroring the tor repository in GitLab CI.
12790 This prevented developers from enabling GitLab CI on master. Fixes
12791 bug 23755; bugfix on 0.3.2.2-alpha.
12792 - Fix the hidden service v3 descriptor decoding fuzzing to use the
12793 latest decoding API correctly. Fixes bug 21509; bugfix
12796 o Minor bugfixes (warnings):
12797 - When we get an HTTP request on a SOCKS port, tell the user about
12798 the new HTTPTunnelPort option. Previously, we would give a "Tor is
12799 not an HTTP Proxy" message, which stopped being true when
12800 HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
12804 Changes in version 0.2.5.15 - 2017-10-25
12805 Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
12806 series. It also adds a new directory authority, Bastet.
12808 Note: the Tor 0.2.5 series will no longer be supported after 1 May
12809 2018. If you need a release with long-term support, please upgrade to
12810 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12812 o Directory authority changes:
12813 - Add "Bastet" as a ninth directory authority to the default list.
12814 Closes ticket 23910.
12815 - The directory authority "Longclaw" has changed its IP address.
12816 Closes ticket 23592.
12818 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
12819 - Avoid an assertion failure bug affecting our implementation of
12820 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
12821 handling of "0xx" differs from what we had expected. Fixes bug
12822 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
12824 o Minor features (geoip):
12825 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12828 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
12829 - Fix a memset() off the end of an array when packing cells. This
12830 bug should be harmless in practice, since the corrupted bytes are
12831 still in the same structure, and are always padding bytes,
12832 ignored, or immediately overwritten, depending on compiler
12833 behavior. Nevertheless, because the memset()'s purpose is to make
12834 sure that any other cell-handling bugs can't expose bytes to the
12835 network, we need to fix it. Fixes bug 22737; bugfix on
12836 0.2.4.11-alpha. Fixes CID 1401591.
12838 o Build features (backport from 0.3.1.5-alpha):
12839 - Tor's repository now includes a Travis Continuous Integration (CI)
12840 configuration file (.travis.yml). This is meant to help new
12841 developers and contributors who fork Tor to a Github repository be
12842 better able to test their changes, and understand what we expect
12843 to pass. To use this new build feature, you must fork Tor to your
12844 Github account, then go into the "Integrations" menu in the
12845 repository settings for your fork and enable Travis, then push
12846 your changes. Closes ticket 22636.
12849 Changes in version 0.2.8.16 - 2017-10-25
12850 Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
12851 series, including a bugfix for a crash issue that had affected relays
12852 under memory pressure. It also adds a new directory authority, Bastet.
12854 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
12855 2018. If you need a release with long-term support, please stick with
12856 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12858 o Directory authority changes:
12859 - Add "Bastet" as a ninth directory authority to the default list.
12860 Closes ticket 23910.
12861 - The directory authority "Longclaw" has changed its IP address.
12862 Closes ticket 23592.
12864 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12865 - Fix a timing-based assertion failure that could occur when the
12866 circuit out-of-memory handler freed a connection's output buffer.
12867 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12869 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12870 - Remove longclaw's IPv6 address, as it will soon change. Authority
12871 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12872 3/8 directory authorities with IPv6 addresses, but there are also
12873 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12875 o Minor features (geoip):
12876 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12880 Changes in version 0.2.9.13 - 2017-10-25
12881 Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
12882 series, including a bugfix for a crash issue that had affected relays
12883 under memory pressure. It also adds a new directory authority, Bastet.
12885 o Directory authority changes:
12886 - Add "Bastet" as a ninth directory authority to the default list.
12887 Closes ticket 23910.
12888 - The directory authority "Longclaw" has changed its IP address.
12889 Closes ticket 23592.
12891 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12892 - Fix a timing-based assertion failure that could occur when the
12893 circuit out-of-memory handler freed a connection's output buffer.
12894 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12896 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12897 - Remove longclaw's IPv6 address, as it will soon change. Authority
12898 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12899 3/8 directory authorities with IPv6 addresses, but there are also
12900 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12902 o Minor features (geoip):
12903 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12906 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
12907 - When a directory authority rejects a descriptor or extrainfo with
12908 a given digest, mark that digest as undownloadable, so that we do
12909 not attempt to download it again over and over. We previously
12910 tried to avoid downloading such descriptors by other means, but we
12911 didn't notice if we accidentally downloaded one anyway. This
12912 behavior became problematic in 0.2.7.2-alpha, when authorities
12913 began pinning Ed25519 keys. Fixes bug 22349; bugfix
12916 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
12917 - Clear the address when node_get_prim_orport() returns early.
12918 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12920 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
12921 - When running as a Windows service, set the ID of the main thread
12922 correctly. Failure to do so made us fail to send log messages to
12923 the controller in 0.2.1.16-rc, slowed down controller event
12924 delivery in 0.2.7.3-rc and later, and crash with an assertion
12925 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
12926 Patch and diagnosis from "Vort".
12929 Changes in version 0.3.0.12 - 2017-10-25
12930 Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
12931 series, including a bugfix for a crash issue that had affected relays
12932 under memory pressure. It also adds a new directory authority, Bastet.
12934 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
12935 2018. If you need a release with long-term support, please stick with
12936 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12938 o Directory authority changes:
12939 - Add "Bastet" as a ninth directory authority to the default list.
12940 Closes ticket 23910.
12941 - The directory authority "Longclaw" has changed its IP address.
12942 Closes ticket 23592.
12944 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12945 - Fix a timing-based assertion failure that could occur when the
12946 circuit out-of-memory handler freed a connection's output buffer.
12947 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12949 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12950 - Remove longclaw's IPv6 address, as it will soon change. Authority
12951 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12952 3/8 directory authorities with IPv6 addresses, but there are also
12953 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12955 o Minor features (geoip):
12956 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12959 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
12960 - When a directory authority rejects a descriptor or extrainfo with
12961 a given digest, mark that digest as undownloadable, so that we do
12962 not attempt to download it again over and over. We previously
12963 tried to avoid downloading such descriptors by other means, but we
12964 didn't notice if we accidentally downloaded one anyway. This
12965 behavior became problematic in 0.2.7.2-alpha, when authorities
12966 began pinning Ed25519 keys. Fixes bug 22349; bugfix
12969 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
12970 - Avoid a possible double close of a circuit by the intro point on
12971 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
12972 bugfix on 0.3.0.1-alpha.
12974 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
12975 - Clear the address when node_get_prim_orport() returns early.
12976 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12978 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
12979 - When running as a Windows service, set the ID of the main thread
12980 correctly. Failure to do so made us fail to send log messages to
12981 the controller in 0.2.1.16-rc, slowed down controller event
12982 delivery in 0.2.7.3-rc and later, and crash with an assertion
12983 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
12984 Patch and diagnosis from "Vort".
12987 Changes in version 0.3.1.8 - 2017-10-25
12988 Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
12989 It includes several bugfixes, including a bugfix for a crash issue
12990 that had affected relays under memory pressure. It also adds
12991 a new directory authority, Bastet.
12993 o Directory authority changes:
12994 - Add "Bastet" as a ninth directory authority to the default list.
12995 Closes ticket 23910.
12996 - The directory authority "Longclaw" has changed its IP address.
12997 Closes ticket 23592.
12999 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13000 - Fix a timing-based assertion failure that could occur when the
13001 circuit out-of-memory handler freed a connection's output buffer.
13002 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13004 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13005 - Remove longclaw's IPv6 address, as it will soon change. Authority
13006 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13007 3/8 directory authorities with IPv6 addresses, but there are also
13008 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13010 o Minor features (geoip):
13011 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13014 o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
13015 - Fix a compilation warning when building with zstd support on
13016 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
13017 and fixed by Andreas Stieger.
13019 o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
13020 - Handle a pathological case when decompressing Zstandard data when
13021 the output buffer size is zero. Fixes bug 23551; bugfix
13024 o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
13025 - Remove the length limit on HTTP status lines that authorities can
13026 send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
13028 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
13029 - Avoid a possible double close of a circuit by the intro point on
13030 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
13031 bugfix on 0.3.0.1-alpha.
13033 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
13034 - Clear the address when node_get_prim_orport() returns early.
13035 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13037 o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
13038 - Fix additional channelpadding unit test failures by using mocked
13039 time instead of actual time for all tests. Fixes bug 23608; bugfix
13043 Changes in version 0.3.2.2-alpha - 2017-09-29
13044 Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
13045 release fixes several minor bugs in the new scheduler and next-
13046 generation onion services; both features were newly added in the 0.3.2
13047 series. Other fixes in this alpha include several fixes for non-fatal
13048 tracebacks which would appear in logs.
13050 With the aim to stabilise the 0.3.2 series by 15 December 2017, this
13051 alpha does not contain any substantial new features. Minor features
13052 include better testing and logging.
13054 The following comprises the complete list of changes included
13057 o Major bugfixes (relay, crash, assertion failure):
13058 - Fix a timing-based assertion failure that could occur when the
13059 circuit out-of-memory handler freed a connection's output buffer.
13060 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13062 o Major bugfixes (scheduler):
13063 - If a channel is put into the scheduler's pending list, then it
13064 starts closing, and then if the scheduler runs before it finishes
13065 closing, the scheduler will get stuck trying to flush its cells
13066 while the lower layers refuse to cooperate. Fix that race
13067 condition by giving the scheduler an escape method. Fixes bug
13068 23676; bugfix on 0.3.2.1-alpha.
13070 o Minor features (build, compilation):
13071 - The "check-changes" feature is now part of the "make check" tests;
13072 we'll use it to try to prevent misformed changes files from
13073 accumulating. Closes ticket 23564.
13074 - Tor builds should now fail if there are any mismatches between the
13075 C type representing a configuration variable and the C type the
13076 data-driven parser uses to store a value there. Previously, we
13077 needed to check these by hand, which sometimes led to mistakes.
13078 Closes ticket 23643.
13080 o Minor features (directory authorities):
13081 - Remove longclaw's IPv6 address, as it will soon change. Authority
13082 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13083 3/8 directory authorities with IPv6 addresses, but there are also
13084 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13086 o Minor features (hidden service, circuit, logging):
13087 - Improve logging of many callsite in the circuit subsystem to print
13088 the circuit identifier(s).
13089 - Log when we cleanup an intro point from a service so we know when
13090 and for what reason it happened. Closes ticket 23604.
13092 o Minor features (logging):
13093 - Log more circuit information whenever we are about to try to
13094 package a relay cell on a circuit with a nonexistent n_chan.
13095 Attempt to diagnose ticket 8185.
13096 - Improve info-level log identification of particular circuits, to
13097 help with debugging. Closes ticket 23645.
13099 o Minor features (relay):
13100 - When choosing which circuits can be expired as unused, consider
13101 circuits from clients even if those clients used regular CREATE
13102 cells to make them; and do not consider circuits from relays even
13103 if they were made with CREATE_FAST. Part of ticket 22805.
13105 o Minor features (robustness):
13106 - Change several fatal assertions when flushing buffers into non-
13107 fatal assertions, to prevent any recurrence of 23690.
13109 o Minor features (spec conformance, bridge, diagnostic):
13110 - When handling the USERADDR command on an ExtOrPort, warn when the
13111 transports provides a USERADDR with no port. In a future version,
13112 USERADDR commands of this format may be rejected. Detects problems
13113 related to ticket 23080.
13115 o Minor features (testing):
13116 - Add a unit test to make sure that our own generated platform
13117 string will be accepted by directory authorities. Closes
13120 o Minor bugfixes (bootstrapping):
13121 - When warning about state file clock skew, report the correct
13122 direction for the detected skew. Fixes bug 23606; bugfix
13124 - Avoid an assertion failure when logging a state file clock skew
13125 very early in bootstrapping. Fixes bug 23607; bugfix
13128 o Minor bugfixes (build, compilation):
13129 - Fix a compilation warning when building with zstd support on
13130 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
13131 and fixed by Andreas Stieger.
13132 - When searching for OpenSSL, don't accept any OpenSSL library that
13133 lacks TLSv1_1_method(): Tor doesn't build with those versions.
13134 Additionally, look in /usr/local/opt/openssl, if it's present.
13135 These changes together repair the default build on OSX systems
13136 with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
13138 o Minor bugfixes (compression):
13139 - Handle a pathological case when decompressing Zstandard data when
13140 the output buffer size is zero. Fixes bug 23551; bugfix
13143 o Minor bugfixes (documentation):
13144 - Fix manpage to not refer to the obsolete (and misspelled)
13145 UseEntryGuardsAsDirectoryGuards parameter in the description of
13146 NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
13148 o Minor bugfixes (hidden service v3):
13149 - Don't log an assertion failure when we can't find the right
13150 information to extend to an introduction point. In rare cases,
13151 this could happen, causing a warning, even though tor would
13152 recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
13153 - Pad RENDEZVOUS cell up to the size of the legacy cell which is
13154 much bigger so the rendezvous point can't distinguish which hidden
13155 service protocol is being used. Fixes bug 23420; bugfix
13158 o Minor bugfixes (hidden service, relay):
13159 - Avoid a possible double close of a circuit by the intro point on
13160 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
13161 bugfix on 0.3.0.1-alpha.
13163 o Minor bugfixes (logging, relay shutdown, annoyance):
13164 - When a circuit is marked for close, do not attempt to package any
13165 cells for channels on that circuit. Previously, we would detect
13166 this condition lower in the call stack, when we noticed that the
13167 circuit had no attached channel, and log an annoying message.
13168 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13170 o Minor bugfixes (scheduler):
13171 - When switching schedulers due to a consensus change, we didn't
13172 give the new scheduler a chance to react to the consensus. Fix
13173 that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
13174 - Make the KISTSchedRunInterval option a non negative value. With
13175 this, the way to disable KIST through the consensus is to set it
13176 to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
13177 - Only notice log the selected scheduler when we switch scheduler
13178 types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
13179 - Avoid a compilation warning on macOS in scheduler_ev_add() caused
13180 by a different tv_usec data type. Fixes bug 23575; bugfix
13182 - Make a hard exit if tor is unable to pick a scheduler which can
13183 happen if the user specifies a scheduler type that is not
13184 supported and not other types in Schedulers. Fixes bug 23581;
13185 bugfix on 0.3.2.1-alpha.
13186 - Properly initialize the scheduler last run time counter so it is
13187 not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
13189 o Minor bugfixes (testing):
13190 - Capture and detect several "Result does not fit" warnings in unit
13191 tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
13193 - Fix additional channelpadding unit test failures by using mocked
13194 time instead of actual time for all tests. Fixes bug 23608; bugfix
13196 - The removal of some old scheduler options caused some tests to
13197 fail on BSD systems. Assume current behavior is correct and make
13198 the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
13200 o Code simplification and refactoring:
13201 - Remove various ways of testing circuits and connections for
13202 "clientness"; instead, favor channel_is_client(). Part of
13205 o Deprecated features:
13206 - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
13207 now deprecated; they do not apply to relays, and they have had no
13208 effect on clients since 0.2.8.x. Closes ticket 19704.
13211 - HiddenServiceVersion man page entry wasn't mentioning the now
13212 supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
13213 - Clarify that the Address option is entirely about setting an
13214 advertised IPv4 address. Closes ticket 18891.
13215 - Clarify the manpage's use of the term "address" to clarify what
13216 kind of address is intended. Closes ticket 21405.
13217 - Document that onion service subdomains are allowed, and ignored.
13218 Closes ticket 18736.
13221 Changes in version 0.3.2.1-alpha - 2017-09-18
13222 Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
13223 includes support for our next-generation ("v3") onion service
13224 protocol, and adds a new circuit scheduler for more responsive
13225 forwarding decisions from relays. There are also numerous other small
13226 features and bugfixes here.
13228 Below are the changes since Tor 0.3.1.7.
13230 o Major feature (scheduler, channel):
13231 - Tor now uses new schedulers to decide which circuits should
13232 deliver cells first, in order to improve congestion at relays. The
13233 first type is called "KIST" ("Kernel Informed Socket Transport"),
13234 and is only available on Linux-like systems: it uses feedback from
13235 the kernel to prevent the kernel's TCP buffers from growing too
13236 full. The second new scheduler type is called "KISTLite": it
13237 behaves the same as KIST, but runs on systems without kernel
13238 support for inspecting TCP implementation details. The old
13239 scheduler is still available, under the name "Vanilla". To change
13240 the default scheduler preference order, use the new "Schedulers"
13241 option. (The default preference order is "KIST,KISTLite,Vanilla".)
13243 Matt Traudt implemented KIST, based on research by Rob Jansen,
13244 John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
13245 more information, see the design paper at
13246 http://www.robgjansen.com/publications/kist-sec2014.pdf and the
13247 followup implementation paper at https://arxiv.org/abs/1709.01044.
13248 Closes ticket 12541.
13250 o Major features (next-generation onion services):
13251 - Tor now supports the next-generation onion services protocol for
13252 clients and services! As part of this release, the core of
13253 proposal 224 has been implemented and is available for
13254 experimentation and testing by our users. This newer version of
13255 onion services ("v3") features many improvements over the legacy
13258 a) Better crypto (replaced SHA1/DH/RSA1024
13259 with SHA3/ed25519/curve25519)
13261 b) Improved directory protocol, leaking much less information to
13264 c) Improved directory protocol, with smaller surface for
13267 d) Better onion address security against impersonation.
13269 e) More extensible introduction/rendezvous protocol.
13271 f) A cleaner and more modular codebase.
13273 You can identify a next-generation onion address by its length:
13274 they are 56 characters long, as in
13275 "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
13277 In the future, we will release more options and features for v3
13278 onion services, but we first need a testing period, so that the
13279 current codebase matures and becomes more robust. Planned features
13280 include: offline keys, advanced client authorization, improved
13281 guard algorithms, and statistics. For full details, see
13284 Legacy ("v2") onion services will still work for the foreseeable
13285 future, and will remain the default until this new codebase gets
13286 tested and hardened. Service operators who want to experiment with
13287 the new system can use the 'HiddenServiceVersion 3' torrc
13288 directive along with the regular onion service configuration
13289 options. We will publish a blog post about this new feature
13292 o Major bugfixes (usability, control port):
13293 - Report trusted clock skew indications as bootstrap errors, so
13294 controllers can more easily alert users when their clocks are
13295 wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
13297 o Minor features (bug detection):
13298 - Log a warning message with a stack trace for any attempt to call
13299 get_options() during option validation. This pattern has caused
13300 subtle bugs in the past. Closes ticket 22281.
13302 o Minor features (client):
13303 - You can now use Tor as a tunneled HTTP proxy: use the new
13304 HTTPTunnelPort option to open a port that accepts HTTP CONNECT
13305 requests. Closes ticket 22407.
13306 - Add an extra check to make sure that we always use the newer guard
13307 selection code for picking our guards. Closes ticket 22779.
13308 - When downloading (micro)descriptors, don't split the list into
13309 multiple requests unless we want at least 32 descriptors.
13310 Previously, we split at 4, not 32, which led to significant
13311 overhead in HTTP request size and degradation in compression
13312 performance. Closes ticket 23220.
13314 o Minor features (command line):
13315 - Add a new commandline option, --key-expiration, which prints when
13316 the current signing key is going to expire. Implements ticket
13317 17639; patch by Isis Lovecruft.
13319 o Minor features (control port):
13320 - If an application tries to use the control port as an HTTP proxy,
13321 respond with a meaningful "This is the Tor control port" message,
13322 and log the event. Closes ticket 1667. Patch from Ravi
13324 - Provide better error message for GETINFO desc/(id|name) when not
13325 fetching router descriptors. Closes ticket 5847. Patch by
13327 - Add GETINFO "{desc,md}/download-enabled", to inform the controller
13328 whether Tor will try to download router descriptors and
13329 microdescriptors respectively. Closes ticket 22684.
13330 - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
13331 so controllers can tell whether the geoip databases are loaded.
13332 Closes ticket 23237.
13333 - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
13334 events. Closes ticket 19254. Patch by "DonnchaC".
13336 o Minor features (development support):
13337 - Developers can now generate a call-graph for Tor using the
13338 "calltool" python program, which post-processes object dumps. It
13339 should work okay on many Linux and OSX platforms, and might work
13340 elsewhere too. To run it, install calltool from
13341 https://gitweb.torproject.org/user/nickm/calltool.git and run
13342 "make callgraph". Closes ticket 19307.
13344 o Minor features (ed25519):
13345 - Add validation function to checks for torsion components in
13346 ed25519 public keys, used by prop224 client-side code. Closes
13347 ticket 22006. Math help by Ian Goldberg.
13349 o Minor features (exit relay, DNS):
13350 - Improve the clarity and safety of the log message from evdns when
13351 receiving an apparently spoofed DNS reply. Closes ticket 3056.
13353 o Minor features (integration, hardening):
13354 - Add a new NoExec option to prevent Tor from running other
13355 programs. When this option is set to 1, Tor will never try to run
13356 another program, regardless of the settings of
13357 PortForwardingHelper, ClientTransportPlugin, or
13358 ServerTransportPlugin. Once NoExec is set, it cannot be disabled
13359 without restarting Tor. Closes ticket 22976.
13361 o Minor features (logging):
13362 - Improve the warning message for specifying a relay by nickname.
13363 The previous message implied that nickname registration was still
13364 part of the Tor network design, which it isn't. Closes
13366 - If the sandbox filter fails to load, suggest to the user that
13367 their kernel might not support seccomp2. Closes ticket 23090.
13369 o Minor features (portability):
13370 - Check at configure time whether uint8_t is the same type as
13371 unsigned char. Lots of existing code already makes this
13372 assumption, and there could be strict aliasing issues if the
13373 assumption is violated. Closes ticket 22410.
13375 o Minor features (relay, configuration):
13376 - Reject attempts to use relative file paths when RunAsDaemon is
13377 set. Previously, Tor would accept these, but the directory-
13378 changing step of RunAsDaemon would give strange and/or confusing
13379 results. Closes ticket 22731.
13381 o Minor features (startup, safety):
13382 - When configured to write a PID file, Tor now exits if it is unable
13383 to do so. Previously, it would warn and continue. Closes
13386 o Minor features (static analysis):
13387 - The BUG() macro has been changed slightly so that Coverity no
13388 longer complains about dead code if the bug is impossible. Closes
13391 o Minor features (testing):
13392 - The default chutney network tests now include tests for the v3
13393 hidden service design. Make sure you have the latest version of
13394 chutney if you want to run these. Closes ticket 22437.
13395 - Add a unit test to verify that we can parse a hardcoded v2 hidden
13396 service descriptor. Closes ticket 15554.
13398 o Minor bugfixes (certificate handling):
13399 - Fix a time handling bug in Tor certificates set to expire after
13400 the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
13401 Coverity as CID 1415728.
13403 o Minor bugfixes (client, usability):
13404 - Refrain from needlessly rejecting SOCKS5-with-hostnames and
13405 SOCKS4a requests that contain IP address strings, even when
13406 SafeSocks in enabled, as this prevents user from connecting to
13407 known IP addresses without relying on DNS for resolving. SafeSocks
13408 still rejects SOCKS connections that connect to IP addresses when
13409 those addresses are _not_ encoded as hostnames. Fixes bug 22461;
13410 bugfix on Tor 0.2.6.2-alpha.
13412 o Minor bugfixes (code correctness):
13413 - Call htons() in extend_cell_format() for encoding a 16-bit value.
13414 Previously we used ntohs(), which happens to behave the same on
13415 all the platforms we support, but which isn't really correct.
13416 Fixes bug 23106; bugfix on 0.2.4.8-alpha.
13417 - For defense-in-depth, make the controller's write_escaped_data()
13418 function robust to extremely long inputs. Fixes bug 19281; bugfix
13419 on 0.1.1.1-alpha. Reported by Guido Vranken.
13421 o Minor bugfixes (compilation):
13422 - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
13423 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13425 o Minor bugfixes (consensus expiry):
13426 - Check for adequate directory information correctly. Previously, Tor
13427 would reconsider whether it had sufficient directory information
13428 every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
13430 o Minor bugfixes (directory protocol):
13431 - Directory servers now include a "Date:" http header for response
13432 codes other than 200. Clients starting with a skewed clock and a
13433 recent consensus were getting "304 Not modified" responses from
13434 directory authorities, so without the Date header, the client
13435 would never hear about a wrong clock. Fixes bug 23499; bugfix
13437 - Make clients wait for 6 seconds before trying to download a
13438 consensus from an authority. Fixes bug 17750; bugfix
13441 o Minor bugfixes (DoS-resistance):
13442 - If future code asks if there are any running bridges, without
13443 checking if bridges are enabled, log a BUG warning rather than
13444 crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
13446 o Minor bugfixes (format strictness):
13447 - Restrict several data formats to decimal. Previously, the
13448 BuildTimeHistogram entries in the state file, the "bw=" entries in
13449 the bandwidth authority file, and the process IDs passed to the
13450 __OwningControllerProcess option could all be specified in hex or
13451 octal as well as in decimal. This was not an intentional feature.
13452 Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
13455 o Minor bugfixes (heartbeat):
13456 - If we fail to write a heartbeat message, schedule a retry for the
13457 minimum heartbeat interval number of seconds in the future. Fixes
13458 bug 19476; bugfix on 0.2.3.1-alpha.
13460 o Minor bugfixes (linux seccomp2 sandbox, logging):
13461 - Fix some messages on unexpected errors from the seccomp2 library.
13462 Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
13464 o Minor bugfixes (logging):
13465 - Remove duplicate log messages regarding opening non-local
13466 SocksPorts upon parsing config and opening listeners at startup.
13467 Fixes bug 4019; bugfix on 0.2.3.3-alpha.
13468 - Use a more comprehensible log message when telling the user
13469 they've excluded every running exit node. Fixes bug 7890; bugfix
13471 - When logging the number of descriptors we intend to download per
13472 directory request, do not log a number higher than then the number
13473 of descriptors we're fetching in total. Fixes bug 19648; bugfix
13475 - When warning about a directory owned by the wrong user, log the
13476 actual name of the user owning the directory. Previously, we'd log
13477 the name of the process owner twice. Fixes bug 23487; bugfix
13479 - The tor specification says hop counts are 1-based, so fix two log
13480 messages that mistakenly logged 0-based hop counts. Fixes bug
13481 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
13482 Credit to Xiaofan Li for reporting this issue.
13484 o Minor bugfixes (portability):
13485 - Stop using the PATH_MAX variable, which is not defined on GNU
13486 Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
13488 o Minor bugfixes (relay):
13489 - When uploading our descriptor for the first time after startup,
13490 report the reason for uploading as "Tor just started" rather than
13491 leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
13492 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13493 relays, to prevent spurious address resolutions and descriptor
13494 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13495 bugfix on in 0.2.8.1-alpha.
13497 o Minor bugfixes (tests):
13498 - Fix a broken unit test for the OutboundAddress option: the parsing
13499 function was never returning an error on failure. Fixes bug 23366;
13500 bugfix on 0.3.0.3-alpha.
13501 - Fix a signed-integer overflow in the unit tests for
13502 dir/download_status_random_backoff, which was untriggered until we
13503 fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
13505 o Minor bugfixes (usability, control port):
13506 - Stop making an unnecessary routerlist check in NETINFO clock skew
13507 detection; this was preventing clients from reporting NETINFO clock
13508 skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
13510 o Code simplification and refactoring:
13511 - Extract the code for handling newly-open channels into a separate
13512 function from the general code to handle channel state
13513 transitions. This change simplifies our callgraph, reducing the
13514 size of the largest strongly connected component by roughly a
13515 factor of two. Closes ticket 22608.
13516 - Remove dead code for largely unused statistics on the number of
13517 times we've attempted various public key operations. Fixes bug
13518 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
13519 - Remove several now-obsolete functions for asking about old
13520 variants directory authority status. Closes ticket 22311; patch
13522 - Remove some of the code that once supported "Named" and "Unnamed"
13523 routers. Authorities no longer vote for these flags. Closes
13525 - Rename the obsolete malleable hybrid_encrypt functions used in TAP
13526 and old hidden services, to indicate that they aren't suitable for
13527 new protocols or formats. Closes ticket 23026.
13528 - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
13529 22521. Patch from Neel Chauhan.
13530 - Split the enormous circuit_send_next_onion_skin() function into
13531 multiple subfunctions. Closes ticket 22804.
13532 - Split the portions of the buffer.c module that handle particular
13533 protocols into separate modules. Part of ticket 23149.
13534 - Use our test macros more consistently, to produce more useful
13535 error messages when our unit tests fail. Add coccinelle patches to
13536 allow us to re-check for test macro uses. Closes ticket 22497.
13538 o Deprecated features:
13539 - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
13540 only applies to direct unencrypted HTTP connections to your
13541 directory server, which your Tor probably isn't using. Closes
13545 - Clarify in the manual that "Sandbox 1" is only supported on Linux
13546 kernels. Closes ticket 22677.
13547 - Document all values of PublishServerDescriptor in the manpage.
13548 Closes ticket 15645.
13549 - Improve the documentation for the directory port part of the
13550 DirAuthority line. Closes ticket 20152.
13551 - Restore documentation for the authorities' "approved-routers"
13552 file. Closes ticket 21148.
13554 o Removed features:
13555 - The AllowDotExit option has been removed as unsafe. It has been
13556 deprecated since 0.2.9.2-alpha. Closes ticket 23426.
13557 - The ClientDNSRejectInternalAddresses flag can no longer be set on
13558 non-testing networks. It has been deprecated since 0.2.9.2-alpha.
13559 Closes ticket 21031.
13560 - The controller API no longer includes an AUTHDIR_NEWDESCS event:
13561 nobody was using it any longer. Closes ticket 22377.
13564 Changes in version 0.2.8.15 - 2017-09-18
13565 Tor 0.2.8.15 backports a collection of bugfixes from later
13568 Most significantly, it includes a fix for TROVE-2017-008, a
13569 security bug that affects hidden services running with the
13570 SafeLogging option disabled. For more information, see
13571 https://trac.torproject.org/projects/tor/ticket/23490
13573 Note that Tor 0.2.8.x will no longer be supported after 1 Jan
13574 2018. We suggest that you upgrade to the latest stable release if
13575 possible. If you can't, we recommend that you upgrade at least to
13576 0.2.9, which will be supported until 2020.
13578 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13579 - Avoid an assertion failure bug affecting our implementation of
13580 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13581 handling of "0xx" differs from what we had expected. Fixes bug
13582 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13585 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13588 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
13589 - Backport a fix for an "unused variable" warning that appeared
13590 in some versions of mingw. Fixes bug 22838; bugfix on
13593 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
13594 - Fix a memset() off the end of an array when packing cells. This
13595 bug should be harmless in practice, since the corrupted bytes are
13596 still in the same structure, and are always padding bytes,
13597 ignored, or immediately overwritten, depending on compiler
13598 behavior. Nevertheless, because the memset()'s purpose is to make
13599 sure that any other cell-handling bugs can't expose bytes to the
13600 network, we need to fix it. Fixes bug 22737; bugfix on
13601 0.2.4.11-alpha. Fixes CID 1401591.
13603 o Build features (backport from 0.3.1.5-alpha):
13604 - Tor's repository now includes a Travis Continuous Integration (CI)
13605 configuration file (.travis.yml). This is meant to help new
13606 developers and contributors who fork Tor to a Github repository be
13607 better able to test their changes, and understand what we expect
13608 to pass. To use this new build feature, you must fork Tor to your
13609 Github account, then go into the "Integrations" menu in the
13610 repository settings for your fork and enable Travis, then push
13611 your changes. Closes ticket 22636.
13614 Changes in version 0.2.9.12 - 2017-09-18
13615 Tor 0.2.9.12 backports a collection of bugfixes from later
13618 Most significantly, it includes a fix for TROVE-2017-008, a
13619 security bug that affects hidden services running with the
13620 SafeLogging option disabled. For more information, see
13621 https://trac.torproject.org/projects/tor/ticket/23490
13623 o Major features (security, backport from 0.3.0.2-alpha):
13624 - Change the algorithm used to decide DNS TTLs on client and server
13625 side, to better resist DNS-based correlation attacks like the
13626 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
13627 Feamster. Now relays only return one of two possible DNS TTL
13628 values, and clients are willing to believe DNS TTL values up to 3
13629 hours long. Closes ticket 19769.
13631 o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
13632 - Fix a rare crash when sending a begin cell on a circuit whose
13633 linked directory connection had already been closed. Fixes bug
13634 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
13636 o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
13637 - Fix a bug that prevented exit nodes from caching DNS records for
13638 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
13640 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
13641 - Fix a typo that had prevented TPROXY-based transparent proxying
13642 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
13643 Patch from "d4fq0fQAgoJ".
13645 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13646 - Avoid an assertion failure bug affecting our implementation of
13647 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13648 handling of "0xx" differs from what we had expected. Fixes bug
13649 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13651 o Minor features (code style, backport from 0.3.1.3-alpha):
13652 - Add "Falls through" comments to our codebase, in order to silence
13653 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
13654 Stieger. Closes ticket 22446.
13656 o Minor features (geoip):
13657 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13660 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
13661 - Roll over monthly accounting at the configured hour and minute,
13662 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
13663 Found by Andrey Karpov with PVS-Studio.
13665 o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
13666 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
13667 bugfix on 0.2.8.1-alpha.
13668 - Fix warnings when building with libscrypt and openssl scrypt support
13669 on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
13670 - When building with certain versions the mingw C header files, avoid
13671 float-conversion warnings when calling the C functions isfinite(),
13672 isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
13674 o Minor bugfixes (compilation, backport from 0.3.1.7):
13675 - Avoid compiler warnings in the unit tests for running tor_sscanf()
13676 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
13678 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
13679 - Backport a fix for an "unused variable" warning that appeared
13680 in some versions of mingw. Fixes bug 22838; bugfix on
13683 o Minor bugfixes (controller, backport from 0.3.1.7):
13684 - Do not crash when receiving a HSPOST command with an empty body.
13685 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
13686 - Do not crash when receiving a POSTDESCRIPTOR command with an
13687 empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
13689 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
13690 - Avoid Coverity build warnings related to our BUG() macro. By
13691 default, Coverity treats BUG() as the Linux kernel does: an
13692 instant abort(). We need to override that so our BUG() macro
13693 doesn't prevent Coverity from analyzing functions that use it.
13694 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
13696 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
13697 - Fix a memset() off the end of an array when packing cells. This
13698 bug should be harmless in practice, since the corrupted bytes are
13699 still in the same structure, and are always padding bytes,
13700 ignored, or immediately overwritten, depending on compiler
13701 behavior. Nevertheless, because the memset()'s purpose is to make
13702 sure that any other cell-handling bugs can't expose bytes to the
13703 network, we need to fix it. Fixes bug 22737; bugfix on
13704 0.2.4.11-alpha. Fixes CID 1401591.
13706 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
13707 - When setting the maximum number of connections allowed by the OS,
13708 always allow some extra file descriptors for other files. Fixes
13709 bug 22797; bugfix on 0.2.0.10-alpha.
13711 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
13712 - Avoid a sandbox failure when trying to re-bind to a socket and
13713 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
13715 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
13716 - Permit the fchmod system call, to avoid crashing on startup when
13717 starting with the seccomp2 sandbox and an unexpected set of
13718 permissions on the data directory or its contents. Fixes bug
13719 22516; bugfix on 0.2.5.4-alpha.
13721 o Minor bugfixes (relay, backport from 0.3.0.5-rc):
13722 - Avoid a double-marked-circuit warning that could happen when we
13723 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
13726 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
13727 - Reject version numbers with non-numeric prefixes (such as +, -, or
13728 whitespace). Disallowing whitespace prevents differential version
13729 parsing between POSIX-based and Windows platforms. Fixes bug 21507
13730 and part of 21508; bugfix on 0.0.8pre1.
13732 o Build features (backport from 0.3.1.5-alpha):
13733 - Tor's repository now includes a Travis Continuous Integration (CI)
13734 configuration file (.travis.yml). This is meant to help new
13735 developers and contributors who fork Tor to a Github repository be
13736 better able to test their changes, and understand what we expect
13737 to pass. To use this new build feature, you must fork Tor to your
13738 Github account, then go into the "Integrations" menu in the
13739 repository settings for your fork and enable Travis, then push
13740 your changes. Closes ticket 22636.
13743 Changes in version 0.3.0.11 - 2017-09-18
13744 Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
13747 Most significantly, it includes a fix for TROVE-2017-008, a
13748 security bug that affects hidden services running with the
13749 SafeLogging option disabled. For more information, see
13750 https://trac.torproject.org/projects/tor/ticket/23490
13752 o Minor features (code style, backport from 0.3.1.7):
13753 - Add "Falls through" comments to our codebase, in order to silence
13754 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
13755 Stieger. Closes ticket 22446.
13758 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13761 o Minor bugfixes (compilation, backport from 0.3.1.7):
13762 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
13763 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
13765 o Minor bugfixes (controller, backport from 0.3.1.7):
13766 - Do not crash when receiving a HSPOST command with an empty body.
13767 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
13768 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
13769 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
13771 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
13772 - When setting the maximum number of connections allowed by the OS,
13773 always allow some extra file descriptors for other files. Fixes
13774 bug 22797; bugfix on 0.2.0.10-alpha.
13776 o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
13777 - Remove a forgotten debugging message when an introduction point
13778 successfully establishes a hidden service prop224 circuit with
13780 - Change three other log_warn() for an introduction point to
13781 protocol warnings, because they can be failure from the network
13782 and are not relevant to the operator. Fixes bug 23078; bugfix on
13783 0.3.0.1-alpha and 0.3.0.2-alpha.
13786 Changes in version 0.3.1.7 - 2017-09-18
13787 Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
13789 With the 0.3.1 series, Tor now serves and downloads directory
13790 information in more compact formats, to save on bandwidth overhead. It
13791 also contains a new padding system to resist netflow-based traffic
13792 analysis, and experimental support for building parts of Tor in Rust
13793 (though no parts of Tor are in Rust yet). There are also numerous
13794 small features, bugfixes on earlier release series, and groundwork for
13795 the hidden services revamp of 0.3.2.
13797 This release also includes a fix for TROVE-2017-008, a security bug
13798 that affects hidden services running with the SafeLogging option
13799 disabled. For more information, see
13800 https://trac.torproject.org/projects/tor/ticket/23490
13802 Per our stable release policy, we plan to support each stable release
13803 series for at least the next nine months, or for three months after
13804 the first stable release of the next series: whichever is longer. If
13805 you need a release with long-term support, we recommend that you stay
13806 with the 0.2.9 series.
13808 Below is a list of the changes since 0.3.1.6-rc. For a list of all
13809 changes since 0.3.0, see the ReleaseNotes file.
13811 o Major bugfixes (security, hidden services, loggging):
13812 - Fix a bug where we could log uninitialized stack when a certain
13813 hidden service error occurred while SafeLogging was disabled.
13814 Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
13815 TROVE-2017-008 and CVE-2017-0380.
13817 o Minor features (defensive programming):
13818 - Create a pair of consensus parameters, nf_pad_tor2web and
13819 nf_pad_single_onion, to disable netflow padding in the consensus
13820 for non-anonymous connections in case the overhead is high. Closes
13823 o Minor features (diagnostic):
13824 - Add a stack trace to the bug warnings that can be logged when
13825 trying to send an outgoing relay cell with n_chan == 0. Diagnostic
13826 attempt for bug 23105.
13828 o Minor features (geoip):
13829 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13832 o Minor bugfixes (compilation):
13833 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
13834 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
13836 o Minor bugfixes (controller):
13837 - Do not crash when receiving a HSPOST command with an empty body.
13838 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
13839 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
13840 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
13842 o Minor bugfixes (relay):
13843 - Inform the geoip and rephist modules about all requests, even on
13844 relays that are only fetching microdescriptors. Fixes a bug
13845 related to 21585; bugfix on 0.3.0.1-alpha.
13847 o Minor bugfixes (unit tests):
13848 - Fix a channelpadding unit test failure on slow systems by using
13849 mocked time instead of actual time. Fixes bug 23077; bugfix
13853 Changes in version 0.3.1.6-rc - 2017-09-05
13854 Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
13855 release series, including a bug that produced weird behavior on
13856 Windows directory caches.
13858 This is the first release candidate in the Tor 0.3.1 series. If we
13859 find no new bugs or regressions here, the first stable 0.3.1 release
13860 will be nearly identical to it.
13862 o Major bugfixes (windows, directory cache):
13863 - On Windows, do not try to delete cached consensus documents and
13864 diffs before they are unmapped from memory--Windows won't allow
13865 that. Instead, allow the consensus cache directory to grow larger,
13866 to hold files that might need to stay around longer. Fixes bug
13867 22752; bugfix on 0.3.1.1-alpha.
13869 o Minor features (directory authority):
13870 - Improve the message that authorities report to relays that present
13871 RSA/Ed25519 keypairs that conflict with previously pinned keys.
13872 Closes ticket 22348.
13874 o Minor features (geoip):
13875 - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
13878 o Minor features (testing):
13879 - Add more tests for compression backend initialization. Closes
13882 o Minor bugfixes (directory cache):
13883 - Fix a memory leak when recovering space in the consensus cache.
13884 Fixes bug 23139; bugfix on 0.3.1.1-alpha.
13886 o Minor bugfixes (hidden service):
13887 - Increase the number of circuits that a service is allowed to
13888 open over a specific period of time. The value was lower than it
13889 should be (8 vs 12) in the normal case of 3 introduction points.
13890 Fixes bug 22159; bugfix on 0.3.0.5-rc.
13891 - Fix a BUG warning during HSv3 descriptor decoding that could be
13892 cause by a specially crafted descriptor. Fixes bug 23233; bugfix
13893 on 0.3.0.1-alpha. Bug found by "haxxpop".
13894 - Rate-limit the log messages if we exceed the maximum number of
13895 allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
13897 o Minor bugfixes (logging, relay):
13898 - Remove a forgotten debugging message when an introduction point
13899 successfully establishes a hidden service prop224 circuit with
13901 - Change three other log_warn() for an introduction point to
13902 protocol warnings, because they can be failure from the network
13903 and are not relevant to the operator. Fixes bug 23078; bugfix on
13904 0.3.0.1-alpha and 0.3.0.2-alpha.
13906 o Minor bugfixes (relay):
13907 - When a relay is not running as a directory cache, it will no
13908 longer generate compressed consensuses and consensus diff
13909 information. Previously, this was a waste of disk and CPU. Fixes
13910 bug 23275; bugfix on 0.3.1.1-alpha.
13912 o Minor bugfixes (robustness, error handling):
13913 - Improve our handling of the cases where OpenSSL encounters a
13914 memory error while encoding keys and certificates. We haven't
13915 observed these errors in the wild, but if they do happen, we now
13916 detect and respond better. Fixes bug 19418; bugfix on all versions
13917 of Tor. Reported by Guido Vranken.
13919 o Minor bugfixes (stability):
13920 - Avoid crashing on a double-free when unable to load or process an
13921 included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
13922 with the clang static analyzer.
13924 o Minor bugfixes (testing):
13925 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13926 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13927 - Port the hs_ntor handshake test to work correctly with recent
13928 versions of the pysha3 module. Fixes bug 23071; bugfix
13931 o Minor bugfixes (Windows service):
13932 - When running as a Windows service, set the ID of the main thread
13933 correctly. Failure to do so made us fail to send log messages to
13934 the controller in 0.2.1.16-rc, slowed down controller event
13935 delivery in 0.2.7.3-rc and later, and crash with an assertion
13936 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
13937 Patch and diagnosis from "Vort".
13940 Changes in version 0.3.0.10 - 2017-08-02
13941 Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
13942 from the current Tor alpha series. OpenBSD users and TPROXY users
13943 should upgrade; others are probably okay sticking with 0.3.0.9.
13945 o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
13946 - Tor's repository now includes a Travis Continuous Integration (CI)
13947 configuration file (.travis.yml). This is meant to help new
13948 developers and contributors who fork Tor to a Github repository be
13949 better able to test their changes, and understand what we expect
13950 to pass. To use this new build feature, you must fork Tor to your
13951 Github account, then go into the "Integrations" menu in the
13952 repository settings for your fork and enable Travis, then push
13953 your changes. Closes ticket 22636.
13955 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
13956 - Fix a typo that had prevented TPROXY-based transparent proxying
13957 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
13958 Patch from "d4fq0fQAgoJ".
13960 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13961 - Avoid an assertion failure bug affecting our implementation of
13962 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13963 handling of "0xbar" differs from what we had expected. Fixes bug
13964 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13966 o Minor features (backport from 0.3.1.5-alpha):
13967 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
13970 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
13971 - Roll over monthly accounting at the configured hour and minute,
13972 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
13973 Found by Andrey Karpov with PVS-Studio.
13975 o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
13976 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
13977 bugfix on 0.2.8.1-alpha.
13978 - Fix warnings when building with libscrypt and openssl scrypt
13979 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
13980 - When building with certain versions of the mingw C header files,
13981 avoid float-conversion warnings when calling the C functions
13982 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
13985 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
13986 - Backport a fix for an "unused variable" warning that appeared
13987 in some versions of mingw. Fixes bug 22838; bugfix on
13990 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
13991 - Avoid Coverity build warnings related to our BUG() macro. By
13992 default, Coverity treats BUG() as the Linux kernel does: an
13993 instant abort(). We need to override that so our BUG() macro
13994 doesn't prevent Coverity from analyzing functions that use it.
13995 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
13997 o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
13998 - When rejecting a router descriptor for running an obsolete version
13999 of Tor without ntor support, warn about the obsolete tor version,
14000 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
14002 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
14003 - Avoid a sandbox failure when trying to re-bind to a socket and
14004 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14006 o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
14007 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
14008 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
14011 Changes in version 0.3.1.5-alpha - 2017-08-01
14012 Tor 0.3.1.5-alpha improves the performance of consensus diff
14013 calculation, fixes a crash bug on older versions of OpenBSD, and fixes
14014 several other bugs. If no serious bugs are found in this version, the
14015 next version will be a release candidate.
14017 This release also marks the end of support for the Tor 0.2.4.x,
14018 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
14019 further bug or security fixes. Anyone still running or distributing
14020 one of those versions should upgrade.
14022 o Major features (build system, continuous integration):
14023 - Tor's repository now includes a Travis Continuous Integration (CI)
14024 configuration file (.travis.yml). This is meant to help new
14025 developers and contributors who fork Tor to a Github repository be
14026 better able to test their changes, and understand what we expect
14027 to pass. To use this new build feature, you must fork Tor to your
14028 Github account, then go into the "Integrations" menu in the
14029 repository settings for your fork and enable Travis, then push
14030 your changes. Closes ticket 22636.
14032 o Major bugfixes (openbsd, denial-of-service):
14033 - Avoid an assertion failure bug affecting our implementation of
14034 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14035 handling of "0xbar" differs from what we had expected. Fixes bug
14036 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14038 o Major bugfixes (relay, performance):
14039 - Perform circuit handshake operations at a higher priority than we
14040 use for consensus diff creation and compression. This should
14041 prevent circuits from starving when a relay or bridge receives a
14042 new consensus, especially on lower-powered machines. Fixes bug
14043 22883; bugfix on 0.3.1.1-alpha.
14045 o Minor features (bridge authority):
14046 - Add "fingerprint" lines to the networkstatus-bridges file produced
14047 by bridge authorities. Closes ticket 22207.
14049 o Minor features (directory cache, consensus diff):
14050 - Add a new MaxConsensusAgeForDiffs option to allow directory cache
14051 operators with low-resource environments to adjust the number of
14052 consensuses they'll store and generate diffs from. Most cache
14053 operators should leave it unchanged. Helps to work around
14056 o Minor features (geoip):
14057 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
14060 o Minor features (relay, performance):
14061 - Always start relays with at least two worker threads, to prevent
14062 priority inversion on slow tasks. Part of the fix for bug 22883.
14063 - Allow background work to be queued with different priorities, so
14064 that a big pile of slow low-priority jobs will not starve out
14065 higher priority jobs. This lays the groundwork for a fix for
14068 o Minor bugfixes (build system, rust):
14069 - Fix a problem where Rust toolchains were not being found when
14070 building without --enable-cargo-online-mode, due to setting the
14071 $HOME environment variable instead of $CARGO_HOME. Fixes bug
14072 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
14074 o Minor bugfixes (compatibility, zstd):
14075 - Write zstd epilogues correctly when the epilogue requires
14076 reallocation of the output buffer, even with zstd 1.3.0.
14077 (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
14078 22927; bugfix on 0.3.1.1-alpha.
14080 o Minor bugfixes (compilation warnings):
14081 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
14082 22915; bugfix on 0.2.8.1-alpha.
14083 - Fix warnings when building with libscrypt and openssl scrypt
14084 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
14085 - Compile correctly when both openssl 1.1.0 and libscrypt are
14086 detected. Previously this would cause an error. Fixes bug 22892;
14087 bugfix on 0.3.1.1-alpha.
14088 - When building with certain versions of the mingw C header files,
14089 avoid float-conversion warnings when calling the C functions
14090 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
14093 o Minor bugfixes (coverity build support):
14094 - Avoid Coverity build warnings related to our BUG() macro. By
14095 default, Coverity treats BUG() as the Linux kernel does: an
14096 instant abort(). We need to override that so our BUG() macro
14097 doesn't prevent Coverity from analyzing functions that use it.
14098 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
14100 o Minor bugfixes (directory authority):
14101 - When a directory authority rejects a descriptor or extrainfo with
14102 a given digest, mark that digest as undownloadable, so that we do
14103 not attempt to download it again over and over. We previously
14104 tried to avoid downloading such descriptors by other means, but we
14105 didn't notice if we accidentally downloaded one anyway. This
14106 behavior became problematic in 0.2.7.2-alpha, when authorities
14107 began pinning Ed25519 keys. Fixes bug 22349; bugfix
14110 o Minor bugfixes (error reporting, windows):
14111 - When formatting Windows error messages, use the English format to
14112 avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
14115 o Minor bugfixes (file limits, osx):
14116 - When setting the maximum number of connections allowed by the OS,
14117 always allow some extra file descriptors for other files. Fixes
14118 bug 22797; bugfix on 0.2.0.10-alpha.
14120 o Minor bugfixes (linux seccomp2 sandbox):
14121 - Avoid a sandbox failure when trying to re-bind to a socket and
14122 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14124 o Minor bugfixes (memory leaks):
14125 - Fix a small memory leak when validating a configuration that uses
14126 two or more AF_UNIX sockets for the same port type. Fixes bug
14127 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
14129 o Minor bugfixes (unit tests):
14130 - test_consdiff_base64cmp would fail on OS X because while OS X
14131 follows the standard of (less than zero/zero/greater than zero),
14132 it doesn't follow the convention of (-1/0/+1). Make the test
14133 comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
14134 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
14135 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
14138 Changes in version 0.3.1.4-alpha - 2017-06-29
14139 Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
14140 to use a guard that was in the same network family as a chosen exit
14141 relay. This is a security regression; all clients running earlier
14142 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
14145 This release also fixes several other bugs introduced in 0.3.0.x
14146 and 0.3.1.x, including others that can affect bandwidth usage
14149 o New dependencies:
14150 - To build with zstd and lzma support, Tor now requires the
14151 pkg-config tool at build time. (This requirement was new in
14152 0.3.1.1-alpha, but was not noted at the time. Noting it here to
14153 close ticket 22623.)
14155 o Major bugfixes (path selection, security):
14156 - When choosing which guard to use for a circuit, avoid the exit's
14157 family along with the exit itself. Previously, the new guard
14158 selection logic avoided the exit, but did not consider its family.
14159 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
14160 006 and CVE-2017-0377.
14162 o Major bugfixes (compression, zstd):
14163 - Correctly detect a full buffer when decompressing a large zstd-
14164 compressed input. Previously, we would sometimes treat a full
14165 buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
14167 o Major bugfixes (directory protocol):
14168 - Ensure that we send "304 Not modified" as HTTP status code when a
14169 client is attempting to fetch a consensus or consensus diff, and
14170 the best one we can send them is one they already have. Fixes bug
14171 22702; bugfix on 0.3.1.1-alpha.
14173 o Major bugfixes (entry guards):
14174 - When starting with an old consensus, do not add new entry guards
14175 unless the consensus is "reasonably live" (under 1 day old). Fixes
14176 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
14178 o Minor features (bug mitigation, diagnostics, logging):
14179 - Avoid an assertion failure, and log a better error message, when
14180 unable to remove a file from the consensus cache on Windows.
14181 Attempts to mitigate and diagnose bug 22752.
14183 o Minor features (geoip):
14184 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
14187 o Minor bugfixes (compression):
14188 - When compressing or decompressing a buffer, check for a failure to
14189 create a compression object. Fixes bug 22626; bugfix
14191 - When decompressing a buffer, check for extra data after the end of
14192 the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
14193 - When decompressing an object received over an anonymous directory
14194 connection, if we have already decompressed it using an acceptable
14195 compression method, do not reject it for looking like an
14196 unacceptable compression method. Fixes part of bug 22670; bugfix
14198 - When serving directory votes compressed with zlib, do not claim to
14199 have compressed them with zstd. Fixes bug 22669; bugfix
14201 - When spooling compressed data to an output buffer, don't try to
14202 spool more data when there is no more data to spool and we are not
14203 trying to flush the input. Previously, we would sometimes launch
14204 compression requests with nothing to do, which interferes with our
14205 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
14207 o Minor bugfixes (defensive programming):
14208 - Detect and break out of infinite loops in our compression code. We
14209 don't think that any such loops exist now, but it's best to be
14210 safe. Closes ticket 22672.
14211 - Fix a memset() off the end of an array when packing cells. This
14212 bug should be harmless in practice, since the corrupted bytes are
14213 still in the same structure, and are always padding bytes,
14214 ignored, or immediately overwritten, depending on compiler
14215 behavior. Nevertheless, because the memset()'s purpose is to make
14216 sure that any other cell-handling bugs can't expose bytes to the
14217 network, we need to fix it. Fixes bug 22737; bugfix on
14218 0.2.4.11-alpha. Fixes CID 1401591.
14220 o Minor bugfixes (linux seccomp2 sandbox):
14221 - Permit the fchmod system call, to avoid crashing on startup when
14222 starting with the seccomp2 sandbox and an unexpected set of
14223 permissions on the data directory or its contents. Fixes bug
14224 22516; bugfix on 0.2.5.4-alpha.
14225 - Fix a crash in the LZMA module, when the sandbox was enabled, and
14226 liblzma would allocate more than 16 MB of memory. We solve this by
14227 bumping the mprotect() limit in the sandbox module from 16 MB to
14228 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
14230 o Minor bugfixes (logging):
14231 - When decompressing, do not warn if we fail to decompress using a
14232 compression method that we merely guessed. Fixes part of bug
14233 22670; bugfix on 0.1.1.14-alpha.
14234 - When decompressing, treat mismatch between content-encoding and
14235 actual compression type as a protocol warning. Fixes part of bug
14236 22670; bugfix on 0.1.1.9-alpha.
14237 - Downgrade "assigned_to_cpuworker failed" message to info-level
14238 severity. In every case that can reach it, either a better warning
14239 has already been logged, or no warning is warranted. Fixes bug
14240 22356; bugfix on 0.2.6.3-alpha.
14241 - Demote a warn that was caused by libevent delays to info if
14242 netflow padding is less than 4.5 seconds late, or to notice
14243 if it is more (4.5 seconds is the amount of time that a netflow
14244 record might be emitted after, if we chose the maximum timeout).
14245 Fixes bug 22212; bugfix on 0.3.1.1-alpha.
14247 o Minor bugfixes (process behavior):
14248 - When exiting because of an error, always exit with a nonzero exit
14249 status. Previously, we would fail to report an error in our exit
14250 status in cases related to __OwningControllerProcess failure,
14251 lockfile contention, and Ed25519 key initialization. Fixes bug
14252 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
14253 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
14257 - Add a manpage description for the key-pinning-journal file. Closes
14259 - Correctly note that bandwidth accounting values are stored in the
14260 state file, and the bw_accounting file is now obsolete. Closes
14262 - Document more of the files in the Tor data directory, including
14263 cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
14264 approved-routers, sr-random, and diff-cache. Found while fixing
14268 Changes in version 0.3.0.9 - 2017-06-29
14269 Tor 0.3.0.9 fixes a path selection bug that would allow a client
14270 to use a guard that was in the same network family as a chosen exit
14271 relay. This is a security regression; all clients running earlier
14272 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
14275 This release also backports several other bugfixes from the 0.3.1.x
14278 o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
14279 - When choosing which guard to use for a circuit, avoid the exit's
14280 family along with the exit itself. Previously, the new guard
14281 selection logic avoided the exit, but did not consider its family.
14282 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
14283 006 and CVE-2017-0377.
14285 o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
14286 - Don't block bootstrapping when a primary bridge is offline and we
14287 can't get its descriptor. Fixes bug 22325; fixes one case of bug
14288 21969; bugfix on 0.3.0.3-alpha.
14290 o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
14291 - When starting with an old consensus, do not add new entry guards
14292 unless the consensus is "reasonably live" (under 1 day old). Fixes
14293 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
14295 o Minor features (geoip):
14296 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
14299 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
14300 - Reject version numbers with non-numeric prefixes (such as +, -, or
14301 whitespace). Disallowing whitespace prevents differential version
14302 parsing between POSIX-based and Windows platforms. Fixes bug 21507
14303 and part of 21508; bugfix on 0.0.8pre1.
14305 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
14306 - Permit the fchmod system call, to avoid crashing on startup when
14307 starting with the seccomp2 sandbox and an unexpected set of
14308 permissions on the data directory or its contents. Fixes bug
14309 22516; bugfix on 0.2.5.4-alpha.
14311 o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
14312 - Fix a memset() off the end of an array when packing cells. This
14313 bug should be harmless in practice, since the corrupted bytes are
14314 still in the same structure, and are always padding bytes,
14315 ignored, or immediately overwritten, depending on compiler
14316 behavior. Nevertheless, because the memset()'s purpose is to make
14317 sure that any other cell-handling bugs can't expose bytes to the
14318 network, we need to fix it. Fixes bug 22737; bugfix on
14319 0.2.4.11-alpha. Fixes CID 1401591.
14322 Changes in version 0.3.1.3-alpha - 2017-06-08
14323 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
14324 remotely crash a hidden service with an assertion failure. Anyone
14325 running a hidden service should upgrade to this version, or to some
14326 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
14328 Tor 0.3.1.3-alpha also includes fixes for several key management bugs
14329 that sometimes made relays unreliable, as well as several other
14330 bugfixes described below.
14332 o Major bugfixes (hidden service, relay, security):
14333 - Fix a remotely triggerable assertion failure when a hidden service
14334 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
14335 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
14336 - Fix a remotely triggerable assertion failure caused by receiving a
14337 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14338 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14341 o Major bugfixes (relay, link handshake):
14342 - When performing the v3 link handshake on a TLS connection, report
14343 that we have the x509 certificate that we actually used on that
14344 connection, even if we have changed certificates since that
14345 connection was first opened. Previously, we would claim to have
14346 used our most recent x509 link certificate, which would sometimes
14347 make the link handshake fail. Fixes one case of bug 22460; bugfix
14350 o Major bugfixes (relays, key management):
14351 - Regenerate link and authentication certificates whenever the key
14352 that signs them changes; also, regenerate link certificates
14353 whenever the signed key changes. Previously, these processes were
14354 only weakly coupled, and we relays could (for minutes to hours)
14355 wind up with an inconsistent set of keys and certificates, which
14356 other relays would not accept. Fixes two cases of bug 22460;
14357 bugfix on 0.3.0.1-alpha.
14358 - When sending an Ed25519 signing->link certificate in a CERTS cell,
14359 send the certificate that matches the x509 certificate that we
14360 used on the TLS connection. Previously, there was a race condition
14361 if the TLS context rotated after we began the TLS handshake but
14362 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
14365 o Major bugfixes (torrc, crash):
14366 - Fix a crash bug when using %include in torrc. Fixes bug 22417;
14367 bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
14369 o Minor features (code style):
14370 - Add "Falls through" comments to our codebase, in order to silence
14371 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
14372 Stieger. Closes ticket 22446.
14374 o Minor features (diagnostic):
14375 - Add logging messages to try to diagnose a rare bug that seems to
14376 generate RSA->Ed25519 cross-certificates dated in the 1970s. We
14377 think this is happening because of incorrect system clocks, but
14378 we'd like to know for certain. Diagnostic for bug 22466.
14380 o Minor bugfixes (correctness):
14381 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14382 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14384 o Minor bugfixes (directory protocol):
14385 - Check for libzstd >= 1.1, because older versions lack the
14386 necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
14388 o Minor bugfixes (link handshake):
14389 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
14390 months, and regenerate it when it is within one month of expiring.
14391 Previously, we had generated this certificate at startup with a
14392 ten-year lifetime, but that could lead to weird behavior when Tor
14393 was started with a grossly inaccurate clock. Mitigates bug 22466;
14394 mitigation on 0.3.0.1-alpha.
14396 o Minor bugfixes (storage directories):
14397 - Always check for underflows in the cached storage directory usage.
14398 If the usage does underflow, re-calculate it. Also, avoid a
14399 separate underflow when the usage is not known. Fixes bug 22424;
14400 bugfix on 0.3.1.1-alpha.
14402 o Minor bugfixes (unit tests):
14403 - The unit tests now pass on systems where localhost is misconfigured
14404 to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
14408 - Clarify the manpage for the (deprecated) torify script. Closes
14411 Changes in version 0.3.0.8 - 2017-06-08
14412 Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
14413 remotely crash a hidden service with an assertion failure. Anyone
14414 running a hidden service should upgrade to this version, or to some
14415 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
14417 Tor 0.3.0.8 also includes fixes for several key management bugs
14418 that sometimes made relays unreliable, as well as several other
14419 bugfixes described below.
14421 o Major bugfixes (hidden service, relay, security, backport
14422 from 0.3.1.3-alpha):
14423 - Fix a remotely triggerable assertion failure when a hidden service
14424 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
14425 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
14426 - Fix a remotely triggerable assertion failure caused by receiving a
14427 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14428 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14431 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
14432 - When performing the v3 link handshake on a TLS connection, report
14433 that we have the x509 certificate that we actually used on that
14434 connection, even if we have changed certificates since that
14435 connection was first opened. Previously, we would claim to have
14436 used our most recent x509 link certificate, which would sometimes
14437 make the link handshake fail. Fixes one case of bug 22460; bugfix
14440 o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
14441 - Regenerate link and authentication certificates whenever the key
14442 that signs them changes; also, regenerate link certificates
14443 whenever the signed key changes. Previously, these processes were
14444 only weakly coupled, and we relays could (for minutes to hours)
14445 wind up with an inconsistent set of keys and certificates, which
14446 other relays would not accept. Fixes two cases of bug 22460;
14447 bugfix on 0.3.0.1-alpha.
14448 - When sending an Ed25519 signing->link certificate in a CERTS cell,
14449 send the certificate that matches the x509 certificate that we
14450 used on the TLS connection. Previously, there was a race condition
14451 if the TLS context rotated after we began the TLS handshake but
14452 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
14455 o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
14456 - Stop rejecting v3 hidden service descriptors because their size
14457 did not match an old padding rule. Fixes bug 22447; bugfix on
14460 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
14461 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
14462 December 2016 (of which ~126 were still functional) with a list of
14463 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
14464 2017. Resolves ticket 21564.
14466 o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
14467 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
14468 bug 22252; bugfix on 0.2.9.3-alpha.
14470 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
14471 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14472 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14474 o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
14475 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
14476 months, and regenerate it when it is within one month of expiring.
14477 Previously, we had generated this certificate at startup with a
14478 ten-year lifetime, but that could lead to weird behavior when Tor
14479 was started with a grossly inaccurate clock. Mitigates bug 22466;
14480 mitigation on 0.3.0.1-alpha.
14482 o Minor bugfixes (memory leak, directory authority, backport from
14484 - When directory authorities reject a router descriptor due to
14485 keypinning, free the router descriptor rather than leaking the
14486 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
14489 Changes in version 0.2.9.11 - 2017-06-08
14490 Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
14491 remotely crash a hidden service with an assertion failure. Anyone
14492 running a hidden service should upgrade to this version, or to some
14493 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14494 are not affected by TROVE-2017-004.)
14496 Tor 0.2.9.11 also backports fixes for several key management bugs
14497 that sometimes made relays unreliable, as well as several other
14498 bugfixes described below.
14500 o Major bugfixes (hidden service, relay, security, backport
14501 from 0.3.1.3-alpha):
14502 - Fix a remotely triggerable assertion failure caused by receiving a
14503 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14504 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14507 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
14508 - When performing the v3 link handshake on a TLS connection, report
14509 that we have the x509 certificate that we actually used on that
14510 connection, even if we have changed certificates since that
14511 connection was first opened. Previously, we would claim to have
14512 used our most recent x509 link certificate, which would sometimes
14513 make the link handshake fail. Fixes one case of bug 22460; bugfix
14516 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
14517 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
14518 December 2016 (of which ~126 were still functional) with a list of
14519 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
14520 2017. Resolves ticket 21564.
14522 o Minor features (future-proofing, backport from 0.3.0.7):
14523 - Tor no longer refuses to download microdescriptors or descriptors if
14524 they are listed as "published in the future". This change will
14525 eventually allow us to stop listing meaningful "published" dates
14526 in microdescriptor consensuses, and thereby allow us to reduce the
14527 resources required to download consensus diffs by over 50%.
14528 Implements part of ticket 21642; implements part of proposal 275.
14530 o Minor features (directory authorities, backport from 0.3.0.4-rc)
14531 - Directory authorities now reject relays running versions
14532 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
14533 suffer from bug 20499 and don't keep their consensus cache
14534 up-to-date. Resolves ticket 20509.
14536 o Minor features (geoip):
14537 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14540 o Minor bugfixes (control port, backport from 0.3.0.6):
14541 - The GETINFO extra-info/digest/<digest> command was broken because
14542 of a wrong base16 decode return value check, introduced when
14543 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
14545 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
14546 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14547 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14549 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
14550 - The getpid() system call is now permitted under the Linux seccomp2
14551 sandbox, to avoid crashing with versions of OpenSSL (and other
14552 libraries) that attempt to learn the process's PID by using the
14553 syscall rather than the VDSO code. Fixes bug 21943; bugfix
14556 o Minor bugfixes (memory leak, directory authority, backport
14557 from 0.3.1.2-alpha):
14558 - When directory authorities reject a router descriptor due to
14559 keypinning, free the router descriptor rather than leaking the
14560 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
14562 Changes in version 0.2.8.14 - 2017-06-08
14563 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
14564 remotely crash a hidden service with an assertion failure. Anyone
14565 running a hidden service should upgrade to this version, or to some
14566 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14567 are not affected by TROVE-2017-004.)
14569 o Major bugfixes (hidden service, relay, security):
14570 - Fix a remotely triggerable assertion failure caused by receiving a
14571 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14572 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14575 o Minor features (geoip):
14576 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14579 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
14580 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
14581 December 2016 (of which ~126 were still functional) with a list of
14582 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
14583 2017. Resolves ticket 21564.
14585 o Minor bugfixes (correctness):
14586 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14587 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14589 Changes in version 0.2.7.8 - 2017-06-08
14590 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
14591 remotely crash a hidden service with an assertion failure. Anyone
14592 running a hidden service should upgrade to this version, or to some
14593 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14594 are not affected by TROVE-2017-004.)
14596 o Major bugfixes (hidden service, relay, security):
14597 - Fix a remotely triggerable assertion failure caused by receiving a
14598 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14599 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14602 o Minor features (geoip):
14603 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14606 o Minor bugfixes (correctness):
14607 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14608 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14611 Changes in version 0.2.6.12 - 2017-06-08
14612 Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
14613 remotely crash a hidden service with an assertion failure. Anyone
14614 running a hidden service should upgrade to this version, or to some
14615 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14616 are not affected by TROVE-2017-004.)
14618 o Major bugfixes (hidden service, relay, security):
14619 - Fix a remotely triggerable assertion failure caused by receiving a
14620 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14621 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14624 o Minor features (geoip):
14625 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14628 o Minor bugfixes (correctness):
14629 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14630 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14632 Changes in version 0.2.5.14 - 2017-06-08
14633 Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
14634 remotely crash a hidden service with an assertion failure. Anyone
14635 running a hidden service should upgrade to this version, or to some
14636 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14637 are not affected by TROVE-2017-004.)
14639 o Major bugfixes (hidden service, relay, security):
14640 - Fix a remotely triggerable assertion failure caused by receiving a
14641 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14642 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14645 o Minor features (geoip):
14646 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14649 o Minor bugfixes (correctness):
14650 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14651 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14653 Changes in version 0.2.4.29 - 2017-06-08
14654 Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
14655 remotely crash a hidden service with an assertion failure. Anyone
14656 running a hidden service should upgrade to this version, or to some
14657 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14658 are not affected by TROVE-2017-004.)
14660 o Major bugfixes (hidden service, relay, security):
14661 - Fix a remotely triggerable assertion failure caused by receiving a
14662 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14663 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14666 o Minor features (geoip):
14667 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14670 o Minor bugfixes (correctness):
14671 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14672 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14675 Changes in version 0.3.1.2-alpha - 2017-05-26
14676 Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
14677 fixes a few bugs found while testing 0.3.1.1-alpha, including a
14678 memory corruption bug that affected relay stability.
14680 o Major bugfixes (crash, relay):
14681 - Fix a memory-corruption bug in relays that set MyFamily.
14682 Previously, they would double-free MyFamily elements when making
14683 the next descriptor or when changing their configuration. Fixes
14684 bug 22368; bugfix on 0.3.1.1-alpha.
14686 o Minor bugfixes (logging):
14687 - Log a better message when a directory authority replies to an
14688 upload with an unexpected status code. Fixes bug 11121; bugfix
14691 o Minor bugfixes (memory leak, directory authority):
14692 - When directory authorities reject a router descriptor due to
14693 keypinning, free the router descriptor rather than leaking the
14694 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
14697 Changes in version 0.3.1.1-alpha - 2017-05-22
14698 Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
14699 reduces the bandwidth usage for Tor's directory protocol, adds some
14700 basic padding to resist netflow-based traffic analysis and to serve as
14701 the basis of other padding in the future, and adds rust support to the
14704 It also contains numerous other small features and improvements to
14705 security, correctness, and performance.
14707 Below are the changes since 0.3.0.7.
14709 o Major features (directory protocol):
14710 - Tor relays and authorities can now serve clients an abbreviated
14711 version of the consensus document, containing only the changes
14712 since an older consensus document that the client holds. Clients
14713 now request these documents when available. When both client and
14714 server use this new protocol, they will use far less bandwidth (up
14715 to 94% less) to keep the client's consensus up-to-date. Implements
14716 proposal 140; closes ticket 13339. Based on work by Daniel Martí.
14717 - Tor can now compress directory traffic with lzma or with zstd
14718 compression algorithms, which can deliver better bandwidth
14719 performance. Because lzma is computationally expensive, it's only
14720 used for documents that can be compressed once and served many
14721 times. Support for these algorithms requires that tor is built
14722 with the libzstd and/or liblzma libraries available. Implements
14723 proposal 278; closes ticket 21662.
14724 - Relays now perform the more expensive compression operations, and
14725 consensus diff generation, in worker threads. This separation
14726 avoids delaying the main thread when a new consensus arrives.
14728 o Major features (experimental):
14729 - Tor can now build modules written in Rust. To turn this on, pass
14730 the "--enable-rust" flag to the configure script. It's not time to
14731 get excited yet: currently, there is no actual Rust functionality
14732 beyond some simple glue code, and a notice at startup to tell you
14733 that Rust is running. Still, we hope that programmers and
14734 packagers will try building Tor with Rust support, so that we can
14735 find issues and solve portability problems. Closes ticket 22106.
14737 o Major features (traffic analysis resistance):
14738 - Connections between clients and relays now send a padding cell in
14739 each direction every 1.5 to 9.5 seconds (tunable via consensus
14740 parameters). This padding will not resist specialized
14741 eavesdroppers, but it should be enough to make many ISPs' routine
14742 network flow logging less useful in traffic analysis against
14745 Padding is negotiated using Tor's link protocol, so both relays
14746 and clients must upgrade for this to take effect. Clients may
14747 still send padding despite the relay's version by setting
14748 ConnectionPadding 1 in torrc, and may disable padding by setting
14749 ConnectionPadding 0 in torrc. Padding may be minimized for mobile
14750 users with the torrc option ReducedConnectionPadding. Implements
14751 Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
14752 - Relays will publish 24 hour totals of padding and non-padding cell
14753 counts to their extra-info descriptors, unless PaddingStatistics 0
14754 is set in torrc. These 24 hour totals are also rounded to
14755 multiples of 10000.
14757 o Major bugfixes (connection usage):
14758 - We use NETINFO cells to try to determine if both relays involved
14759 in a connection will agree on the canonical status of that
14760 connection. We prefer the connections where this is the case for
14761 extend cells, and try to close connections where relays disagree
14762 on their canonical status early. Also, we now prefer the oldest
14763 valid connection for extend cells. These two changes should reduce
14764 the number of long-term connections that are kept open between
14765 relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
14766 - Relays now log hourly statistics (look for
14767 "channel_check_for_duplicates" lines) on the total number of
14768 connections to other relays. If the number of connections per
14769 relay is unexpectedly large, this log message is at notice level.
14770 Otherwise it is at info.
14772 o Major bugfixes (entry guards):
14773 - Don't block bootstrapping when a primary bridge is offline and we
14774 can't get its descriptor. Fixes bug 22325; fixes one case of bug
14775 21969; bugfix on 0.3.0.3-alpha.
14777 o Major bugfixes (linux TPROXY support):
14778 - Fix a typo that had prevented TPROXY-based transparent proxying
14779 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14780 Patch from "d4fq0fQAgoJ".
14782 o Minor features (security, windows):
14783 - Enable a couple of pieces of Windows hardening: one
14784 (HeapEnableTerminationOnCorruption) that has been on-by-default
14785 since Windows 8, and unavailable before Windows 7; and one
14786 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
14787 affect us, but shouldn't do any harm. Closes ticket 21953.
14789 o Minor features (config options):
14790 - Allow "%include" directives in torrc configuration files. These
14791 directives import the settings from other files, or from all the
14792 files in a directory. Closes ticket 1922. Code by Daniel Pinto.
14793 - Make SAVECONF return an error when overwriting a torrc that has
14794 includes. Using SAVECONF with the FORCE option will allow it to
14795 overwrite torrc even if includes are used. Related to ticket 1922.
14796 - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
14797 will work without the FORCE option. Related to ticket 1922.
14799 o Minor features (controller):
14800 - Warn the first time that a controller requests data in the long-
14801 deprecated 'GETINFO network-status' format. Closes ticket 21703.
14803 o Minor features (defaults):
14804 - The default value for UseCreateFast is now 0: clients which
14805 haven't yet received a consensus document will now use a proper
14806 ntor handshake to talk to their directory servers whenever they
14807 can. Closes ticket 21407.
14808 - Onion key rotation and expiry intervals are now defined as a
14809 network consensus parameter, per proposal 274. The default
14810 lifetime of an onion key is increased from 7 to 28 days. Old onion
14811 keys will expire after 7 days by default. This change will make
14812 consensus diffs much smaller, and save significant bandwidth.
14813 Closes ticket 21641.
14815 o Minor features (fallback directory list):
14816 - Update the fallback directory mirror whitelist and blacklist based
14817 on operator emails. Closes task 21121.
14818 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
14819 December 2016 (of which ~126 were still functional) with a list of
14820 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
14821 2017. Resolves ticket 21564.
14823 o Minor features (hidden services, logging):
14824 - Log a message when a hidden service descriptor has fewer
14825 introduction points than specified in
14826 HiddenServiceNumIntroductionPoints. Closes tickets 21598.
14827 - Log a message when a hidden service reaches its introduction point
14828 circuit limit, and when that limit is reset. Follow up to ticket
14829 21594; closes ticket 21622.
14830 - Warn user if multiple entries in EntryNodes and at least one
14831 HiddenService are used together. Pinning EntryNodes along with a
14832 hidden service can be possibly harmful; for instance see ticket
14833 14917 or 21155. Closes ticket 21155.
14835 o Minor features (linux seccomp2 sandbox):
14836 - We now have a document storage backend compatible with the Linux
14837 seccomp2 sandbox. This backend is used for consensus documents and
14838 diffs between them; in the long term, we'd like to use it for
14839 unparseable directory material too. Closes ticket 21645
14840 - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
14841 from 1MB to 16MB. This was necessary with the glibc allocator in
14842 order to allow worker threads to allocate more memory -- which in
14843 turn is necessary because of our new use of worker threads for
14844 compression. Closes ticket 22096.
14846 o Minor features (logging):
14847 - Log files are no longer created world-readable by default.
14848 (Previously, most distributors would store the logs in a non-
14849 world-readable location to prevent inappropriate access. This
14850 change is an extra precaution.) Closes ticket 21729; patch
14853 o Minor features (performance):
14854 - Our Keccak (SHA-3) implementation now accesses memory more
14855 efficiently, especially on little-endian systems. Closes
14857 - Add an O(1) implementation of channel_find_by_global_id(), to
14858 speed some controller functions.
14860 o Minor features (relay, configuration):
14861 - The MyFamily option may now be repeated as many times as desired,
14862 for relays that want to configure large families. Closes ticket
14863 4998; patch by Daniel Pinto.
14865 o Minor features (safety):
14866 - Add an explicit check to extrainfo_parse_entry_from_string() for
14867 NULL inputs. We don't believe this can actually happen, but it may
14868 help silence a warning from the Clang analyzer. Closes
14871 o Minor features (testing):
14872 - Add a "--disable-memory-sentinels" feature to help with fuzzing.
14873 When Tor is compiled with this option, we disable a number of
14874 redundant memory-safety failsafes that are intended to stop bugs
14875 from becoming security issues. This makes it easier to hunt for
14876 bugs that would be security issues without the failsafes turned
14877 on. Closes ticket 21439.
14878 - Add a general event-tracing instrumentation support to Tor. This
14879 subsystem will enable developers and researchers to add fine-
14880 grained instrumentation to their Tor instances, for use when
14881 examining Tor network performance issues. There are no trace
14882 events yet, and event-tracing is off by default unless enabled at
14883 compile time. Implements ticket 13802.
14884 - Improve our version parsing tests: add tests for typical version
14885 components, add tests for invalid versions, including numeric
14886 range and non-numeric prefixes. Unit tests 21278, 21450, and
14887 21507. Partially implements 21470.
14889 o Minor bugfixes (bandwidth accounting):
14890 - Roll over monthly accounting at the configured hour and minute,
14891 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
14892 Found by Andrey Karpov with PVS-Studio.
14894 o Minor bugfixes (code correctness):
14895 - Accurately identify client connections by their lack of peer
14896 authentication. This means that we bail out earlier if asked to
14897 extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
14900 o Minor bugfixes (configuration):
14901 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
14902 bug 22252; bugfix on 0.2.9.3-alpha.
14904 o Minor bugfixes (connection lifespan):
14905 - Allow more control over how long TLS connections are kept open:
14906 unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
14907 single option called CircuitsAvailableTimeout. Also, allow the
14908 consensus to control the default values for both this preference
14909 and the lifespan of relay-to-relay connections. Fixes bug 17592;
14910 bugfix on 0.2.5.5-alpha.
14911 - Increase the initial circuit build timeout testing frequency, to
14912 help ensure that ReducedConnectionPadding clients finish learning
14913 a timeout before their orconn would expire. The initial testing
14914 rate was set back in the days of TAP and before the Tor Browser
14915 updater, when we had to be much more careful about new clients
14916 making lots of circuits. With this change, a circuit build timeout
14917 is learned in about 15-20 minutes, instead of 100-120 minutes.
14919 o Minor bugfixes (controller):
14920 - GETINFO onions/current and onions/detached no longer respond with
14921 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
14922 - Trigger HS descriptor events on the control port when the client
14923 fails to pick a hidden service directory for a hidden service.
14924 This can happen if all the hidden service directories are in
14925 ExcludeNodes, or they have all been queried within the last 15
14926 minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
14928 o Minor bugfixes (directory authority):
14929 - When rejecting a router descriptor for running an obsolete version
14930 of Tor without ntor support, warn about the obsolete tor version,
14931 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
14932 - Prevent the shared randomness subsystem from asserting when
14933 initialized by a bridge authority with an incomplete configuration
14934 file. Fixes bug 21586; bugfix on 0.2.9.8.
14936 o Minor bugfixes (exit-side DNS):
14937 - Fix an untriggerable assertion that checked the output of a
14938 libevent DNS error, so that the assertion actually behaves as
14939 expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
14940 Karpov using PVS-Studio.
14942 o Minor bugfixes (fallback directories):
14943 - Make the usage example in updateFallbackDirs.py actually work, and
14944 explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
14945 - Decrease the guard flag average required to be a fallback. This
14946 allows us to keep relays that have their guard flag removed when
14947 they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
14948 - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
14949 bugfix on 0.2.8.1-alpha.
14950 - Make sure fallback directory mirrors have the same address, port,
14951 and relay identity key for at least 30 days before they are
14952 selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
14954 o Minor bugfixes (hidden services):
14955 - Stop printing a cryptic warning when a hidden service gets a
14956 request to connect to a virtual port that it hasn't configured.
14957 Fixes bug 16706; bugfix on 0.2.6.3-alpha.
14958 - Simplify hidden service descriptor creation by using an existing
14959 flag to check if an introduction point is established. Fixes bug
14960 21599; bugfix on 0.2.7.2-alpha.
14962 o Minor bugfixes (memory leak):
14963 - Fix a small memory leak at exit from the backtrace handler code.
14964 Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
14966 o Minor bugfixes (protocol, logging):
14967 - Downgrade a log statement about unexpected relay cells from "bug"
14968 to "protocol warning", because there is at least one use case
14969 where it can be triggered by a buggy tor implementation. Fixes bug
14970 21293; bugfix on 0.1.1.14-alpha.
14972 o Minor bugfixes (testing):
14973 - Use unbuffered I/O for utility functions around the
14974 process_handle_t type. This fixes unit test failures reported on
14975 OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
14976 - Make display of captured unit test log messages consistent. Fixes
14977 bug 21510; bugfix on 0.2.9.3-alpha.
14978 - Make test-network.sh always call chutney's test-network.sh.
14979 Previously, this only worked on systems which had bash installed,
14980 due to some bash-specific code in the script. Fixes bug 19699;
14981 bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
14983 o Minor bugfixes (voting consistency):
14984 - Reject version numbers with non-numeric prefixes (such as +, -, or
14985 whitespace). Disallowing whitespace prevents differential version
14986 parsing between POSIX-based and Windows platforms. Fixes bug 21507
14987 and part of 21508; bugfix on 0.0.8pre1.
14989 o Minor bugfixes (windows, relay):
14990 - Resolve "Failure from drain_fd: No error" warnings on Windows
14991 relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
14993 o Code simplification and refactoring:
14994 - Break up the 630-line function connection_dir_client_reached_eof()
14995 into a dozen smaller functions. This change should help
14996 maintainability and readability of the client directory code.
14997 - Isolate our use of the openssl headers so that they are only
14998 included from our crypto wrapper modules, and from tests that
14999 examine those modules' internals. Closes ticket 21841.
15000 - Simplify our API to launch directory requests, making it more
15001 extensible and less error-prone. Now it's easier to add extra
15002 headers to directory requests. Closes ticket 21646.
15003 - Our base64 decoding functions no longer overestimate the output
15004 space that they need when parsing unpadded inputs. Closes
15006 - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
15007 Resolves ticket 22213.
15008 - The logic that directory caches use to spool request to clients,
15009 serving them one part at a time so as not to allocate too much
15010 memory, has been refactored for consistency. Previously there was
15011 a separate spooling implementation per type of spoolable data. Now
15012 there is one common spooling implementation, with extensible data
15013 types. Closes ticket 21651.
15014 - Tor's compression module now supports multiple backends. Part of
15015 the implementation for proposal 278; closes ticket 21663.
15018 - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
15019 Closes ticket 21873.
15020 - Correct documentation about the default DataDirectory value.
15021 Closes ticket 21151.
15022 - Document the default behavior of NumEntryGuards and
15023 NumDirectoryGuards correctly. Fixes bug 21715; bugfix
15025 - Document key=value pluggable transport arguments for Bridge lines
15026 in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
15027 - Note that bandwidth-limiting options don't affect TCP headers or
15028 DNS. Closes ticket 17170.
15030 o Removed features (configuration options, all in ticket 22060):
15031 - These configuration options are now marked Obsolete, and no longer
15032 have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
15033 AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
15034 TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
15035 in 0.2.9.2-alpha and have now been removed. The previous default
15036 behavior is now always chosen; the previous (less secure) non-
15037 default behavior is now unavailable.
15038 - CloseHSClientCircuitsImmediatelyOnTimeout and
15039 CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
15040 0.2.9.2-alpha and now have been removed. HS circuits never close
15041 on circuit build timeout; they have a longer timeout period.
15042 - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
15043 in 0.2.9.2-alpha and now have been removed. Use the ORPort option
15044 (and others) to configure listen-only and advertise-only addresses.
15046 o Removed features (tools):
15047 - We've removed the tor-checkkey tool from src/tools. Long ago, we
15048 used it to help people detect RSA keys that were generated by
15049 versions of Debian affected by CVE-2008-0166. But those keys have
15050 been out of circulation for ages, and this tool is no longer
15051 required. Closes ticket 21842.
15054 Changes in version 0.3.0.7 - 2017-05-15
15055 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
15056 of Tor 0.3.0.x, where an attacker could cause a Tor relay process
15057 to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
15058 clients are not affected.
15060 o Major bugfixes (hidden service directory, security):
15061 - Fix an assertion failure in the hidden service directory code, which
15062 could be used by an attacker to remotely cause a Tor relay process to
15063 exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
15064 should upgrade. This security issue is tracked as TROVE-2017-002.
15065 Fixes bug 22246; bugfix on 0.3.0.1-alpha.
15068 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15071 o Minor features (future-proofing):
15072 - Tor no longer refuses to download microdescriptors or descriptors
15073 if they are listed as "published in the future". This change will
15074 eventually allow us to stop listing meaningful "published" dates
15075 in microdescriptor consensuses, and thereby allow us to reduce the
15076 resources required to download consensus diffs by over 50%.
15077 Implements part of ticket 21642; implements part of proposal 275.
15079 o Minor bugfixes (Linux seccomp2 sandbox):
15080 - The getpid() system call is now permitted under the Linux seccomp2
15081 sandbox, to avoid crashing with versions of OpenSSL (and other
15082 libraries) that attempt to learn the process's PID by using the
15083 syscall rather than the VDSO code. Fixes bug 21943; bugfix
15087 Changes in version 0.3.0.6 - 2017-04-26
15088 Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
15090 With the 0.3.0 series, clients and relays now use Ed25519 keys to
15091 authenticate their link connections to relays, rather than the old
15092 RSA1024 keys that they used before. (Circuit crypto has been
15093 Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
15094 the guard selection and replacement algorithm to behave more robustly
15095 in the presence of unreliable networks, and to resist guard-
15098 This series also includes numerous other small features and bugfixes,
15099 along with more groundwork for the upcoming hidden-services revamp.
15101 Per our stable release policy, we plan to support the Tor 0.3.0
15102 release series for at least the next nine months, or for three months
15103 after the first stable release of the 0.3.1 series: whichever is
15104 longer. If you need a release with long-term support, we recommend
15105 that you stay with the 0.2.9 series.
15107 Below are the changes since 0.3.0.5-rc. For a list of all changes
15108 since 0.2.9, see the ReleaseNotes file.
15110 o Minor features (geoip):
15111 - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
15114 o Minor bugfixes (control port):
15115 - The GETINFO extra-info/digest/<digest> command was broken because
15116 of a wrong base16 decode return value check, introduced when
15117 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
15119 o Minor bugfixes (crash prevention):
15120 - Fix a (currently untriggerable, but potentially dangerous) crash
15121 bug when base32-encoding inputs whose sizes are not a multiple of
15122 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
15125 Changes in version 0.3.0.5-rc - 2017-04-05
15126 Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
15127 0.3.0 release series.
15129 This is the second release candidate in the Tor 0.3.0 series, and has
15130 much fewer changes than the first. If we find no new bugs or
15131 regressions here, the first stable 0.3.0 release will be nearly
15134 o Major bugfixes (crash, directory connections):
15135 - Fix a rare crash when sending a begin cell on a circuit whose
15136 linked directory connection had already been closed. Fixes bug
15137 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
15139 o Major bugfixes (guard selection):
15140 - Fix a guard selection bug where Tor would refuse to bootstrap in
15141 some cases if the user swapped a bridge for another bridge in
15142 their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
15143 Reported by "torvlnt33r".
15145 o Minor features (geoip):
15146 - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
15149 o Minor bugfix (compilation):
15150 - Fix a warning when compiling hs_service.c. Previously, it had no
15151 exported symbols when compiled for libor.a, resulting in a
15152 compilation warning from clang. Fixes bug 21825; bugfix
15155 o Minor bugfixes (hidden services):
15156 - Make hidden services check for failed intro point connections,
15157 even when they have exceeded their intro point creation limit.
15158 Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
15159 - Make hidden services with 8 to 10 introduction points check for
15160 failed circuits immediately after startup. Previously, they would
15161 wait for 5 minutes before performing their first checks. Fixes bug
15162 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
15164 o Minor bugfixes (memory leaks):
15165 - Fix a memory leak when using GETCONF on a port option. Fixes bug
15166 21682; bugfix on 0.3.0.3-alpha.
15168 o Minor bugfixes (relay):
15169 - Avoid a double-marked-circuit warning that could happen when we
15170 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
15173 o Minor bugfixes (tests):
15174 - Run the entry_guard_parse_from_state_full() test with the time set
15175 to a specific date. (The guard state that this test was parsing
15176 contained guards that had expired since the test was first
15177 written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
15180 - Update the description of the directory server options in the
15181 manual page, to clarify that a relay no longer needs to set
15182 DirPort in order to be a directory cache. Closes ticket 21720.
15186 Changes in version 0.2.8.13 - 2017-03-03
15187 Tor 0.2.8.13 backports a security fix from later Tor
15188 releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
15189 this release, if for some reason they cannot upgrade to a later
15190 release series, and if they build Tor with the --enable-expensive-hardening
15193 Note that support for Tor 0.2.8.x is ending next year: we will not issue
15194 any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
15195 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
15197 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
15198 - Fix an integer underflow bug when comparing malformed Tor
15199 versions. This bug could crash Tor when built with
15200 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15201 0.2.9.8, which were built with -ftrapv by default. In other cases
15202 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15203 on 0.0.8pre1. Found by OSS-Fuzz.
15205 o Minor features (geoip):
15206 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15210 Changes in version 0.2.7.7 - 2017-03-03
15211 Tor 0.2.7.7 backports a number of security fixes from later Tor
15212 releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
15213 this release, if for some reason they cannot upgrade to a later
15216 Note that support for Tor 0.2.7.x is ending this year: we will not issue
15217 any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
15218 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
15220 o Directory authority changes (backport from 0.2.8.5-rc):
15221 - Urras is no longer a directory authority. Closes ticket 19271.
15223 o Directory authority changes (backport from 0.2.9.2-alpha):
15224 - The "Tonga" bridge authority has been retired; the new bridge
15225 authority is "Bifroest". Closes tickets 19728 and 19690.
15227 o Directory authority key updates (backport from 0.2.8.1-alpha):
15228 - Update the V3 identity key for the dannenberg directory authority:
15229 it was changed on 18 November 2015. Closes task 17906. Patch
15232 o Major bugfixes (parsing, security, backport from 0.2.9.8):
15233 - Fix a bug in parsing that could cause clients to read a single
15234 byte past the end of an allocated region. This bug could be used
15235 to cause hardened clients (built with --enable-expensive-hardening)
15236 to crash if they tried to visit a hostile hidden service. Non-
15237 hardened clients are only affected depending on the details of
15238 their platform's memory allocator. Fixes bug 21018; bugfix on
15239 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15240 2016-12-002 and as CVE-2016-1254.
15242 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
15243 - Stop a crash that could occur when a client running with DNSPort
15244 received a query with multiple address types, and the first
15245 address type was not supported. Found and fixed by Scott Dial.
15246 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
15247 - Prevent a class of security bugs caused by treating the contents
15248 of a buffer chunk as if they were a NUL-terminated string. At
15249 least one such bug seems to be present in all currently used
15250 versions of Tor, and would allow an attacker to remotely crash
15251 most Tor instances, especially those compiled with extra compiler
15252 hardening. With this defense in place, such bugs can't crash Tor,
15253 though we should still fix them as they occur. Closes ticket
15254 20384 (TROVE-2016-10-001).
15256 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
15257 - Avoid a difficult-to-trigger heap corruption attack when extending
15258 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
15259 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
15260 Reported by Guido Vranken.
15262 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
15263 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
15264 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
15266 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
15267 - If OpenSSL fails to generate an RSA key, do not retain a dangling
15268 pointer to the previous (uninitialized) key value. The impact here
15269 should be limited to a difficult-to-trigger crash, if OpenSSL is
15270 running an engine that makes key generation failures possible, or
15271 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
15272 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
15275 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
15276 - Fix an integer underflow bug when comparing malformed Tor
15277 versions. This bug could crash Tor when built with
15278 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15279 0.2.9.8, which were built with -ftrapv by default. In other cases
15280 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15281 on 0.0.8pre1. Found by OSS-Fuzz.
15283 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
15284 - Make memwipe() do nothing when passed a NULL pointer or buffer of
15285 zero size. Check size argument to memwipe() for underflow. Fixes
15286 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
15289 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
15290 - Make Tor survive errors involving connections without a
15291 corresponding event object. Previously we'd fail with an
15292 assertion; now we produce a log message. Related to bug 16248.
15294 o Minor features (geoip):
15295 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15299 Changes in version 0.2.6.11 - 2017-03-03
15300 Tor 0.2.6.11 backports a number of security fixes from later Tor
15301 releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
15302 this release, if for some reason they cannot upgrade to a later
15305 Note that support for Tor 0.2.6.x is ending this year: we will not issue
15306 any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
15307 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
15309 o Directory authority changes (backport from 0.2.8.5-rc):
15310 - Urras is no longer a directory authority. Closes ticket 19271.
15312 o Directory authority changes (backport from 0.2.9.2-alpha):
15313 - The "Tonga" bridge authority has been retired; the new bridge
15314 authority is "Bifroest". Closes tickets 19728 and 19690.
15316 o Directory authority key updates (backport from 0.2.8.1-alpha):
15317 - Update the V3 identity key for the dannenberg directory authority:
15318 it was changed on 18 November 2015. Closes task 17906. Patch
15321 o Major features (security fixes, backport from 0.2.9.4-alpha):
15322 - Prevent a class of security bugs caused by treating the contents
15323 of a buffer chunk as if they were a NUL-terminated string. At
15324 least one such bug seems to be present in all currently used
15325 versions of Tor, and would allow an attacker to remotely crash
15326 most Tor instances, especially those compiled with extra compiler
15327 hardening. With this defense in place, such bugs can't crash Tor,
15328 though we should still fix them as they occur. Closes ticket
15329 20384 (TROVE-2016-10-001).
15331 o Major bugfixes (parsing, security, backport from 0.2.9.8):
15332 - Fix a bug in parsing that could cause clients to read a single
15333 byte past the end of an allocated region. This bug could be used
15334 to cause hardened clients (built with --enable-expensive-hardening)
15335 to crash if they tried to visit a hostile hidden service. Non-
15336 hardened clients are only affected depending on the details of
15337 their platform's memory allocator. Fixes bug 21018; bugfix on
15338 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15339 2016-12-002 and as CVE-2016-1254.
15341 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
15342 - Stop a crash that could occur when a client running with DNSPort
15343 received a query with multiple address types, and the first
15344 address type was not supported. Found and fixed by Scott Dial.
15345 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
15347 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
15348 - Fix an error that could cause us to read 4 bytes before the
15349 beginning of an openssl string. This bug could be used to cause
15350 Tor to crash on systems with unusual malloc implementations, or
15351 systems with unusual hardening installed. Fixes bug 17404; bugfix
15354 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
15355 - Avoid a difficult-to-trigger heap corruption attack when extending
15356 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
15357 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
15358 Reported by Guido Vranken.
15360 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
15361 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
15362 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
15364 o Major bugfixes (guard selection, backport from 0.2.7.6):
15365 - Actually look at the Guard flag when selecting a new directory
15366 guard. When we implemented the directory guard design, we
15367 accidentally started treating all relays as if they have the Guard
15368 flag during guard selection, leading to weaker anonymity and worse
15369 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
15372 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
15373 - If OpenSSL fails to generate an RSA key, do not retain a dangling
15374 pointer to the previous (uninitialized) key value. The impact here
15375 should be limited to a difficult-to-trigger crash, if OpenSSL is
15376 running an engine that makes key generation failures possible, or
15377 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
15378 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
15381 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
15382 - Fix an integer underflow bug when comparing malformed Tor
15383 versions. This bug could crash Tor when built with
15384 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15385 0.2.9.8, which were built with -ftrapv by default. In other cases
15386 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15387 on 0.0.8pre1. Found by OSS-Fuzz.
15389 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
15390 - Make memwipe() do nothing when passed a NULL pointer or buffer of
15391 zero size. Check size argument to memwipe() for underflow. Fixes
15392 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
15395 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
15396 - Make Tor survive errors involving connections without a
15397 corresponding event object. Previously we'd fail with an
15398 assertion; now we produce a log message. Related to bug 16248.
15400 o Minor features (geoip):
15401 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15404 o Minor bugfixes (compilation, backport from 0.2.7.6):
15405 - Fix a compilation warning with Clang 3.6: Do not check the
15406 presence of an address which can never be NULL. Fixes bug 17781.
15409 Changes in version 0.2.5.13 - 2017-03-03
15410 Tor 0.2.5.13 backports a number of security fixes from later Tor
15411 releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
15412 this release, if for some reason they cannot upgrade to a later
15415 Note that support for Tor 0.2.5.x is ending next year: we will not issue
15416 any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
15417 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
15419 o Directory authority changes (backport from 0.2.8.5-rc):
15420 - Urras is no longer a directory authority. Closes ticket 19271.
15422 o Directory authority changes (backport from 0.2.9.2-alpha):
15423 - The "Tonga" bridge authority has been retired; the new bridge
15424 authority is "Bifroest". Closes tickets 19728 and 19690.
15426 o Directory authority key updates (backport from 0.2.8.1-alpha):
15427 - Update the V3 identity key for the dannenberg directory authority:
15428 it was changed on 18 November 2015. Closes task 17906. Patch
15431 o Major features (security fixes, backport from 0.2.9.4-alpha):
15432 - Prevent a class of security bugs caused by treating the contents
15433 of a buffer chunk as if they were a NUL-terminated string. At
15434 least one such bug seems to be present in all currently used
15435 versions of Tor, and would allow an attacker to remotely crash
15436 most Tor instances, especially those compiled with extra compiler
15437 hardening. With this defense in place, such bugs can't crash Tor,
15438 though we should still fix them as they occur. Closes ticket
15439 20384 (TROVE-2016-10-001).
15441 o Major bugfixes (parsing, security, backport from 0.2.9.8):
15442 - Fix a bug in parsing that could cause clients to read a single
15443 byte past the end of an allocated region. This bug could be used
15444 to cause hardened clients (built with --enable-expensive-hardening)
15445 to crash if they tried to visit a hostile hidden service. Non-
15446 hardened clients are only affected depending on the details of
15447 their platform's memory allocator. Fixes bug 21018; bugfix on
15448 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15449 2016-12-002 and as CVE-2016-1254.
15451 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
15452 - Stop a crash that could occur when a client running with DNSPort
15453 received a query with multiple address types, and the first
15454 address type was not supported. Found and fixed by Scott Dial.
15455 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
15457 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
15458 - Fix an error that could cause us to read 4 bytes before the
15459 beginning of an openssl string. This bug could be used to cause
15460 Tor to crash on systems with unusual malloc implementations, or
15461 systems with unusual hardening installed. Fixes bug 17404; bugfix
15464 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
15465 - Avoid a difficult-to-trigger heap corruption attack when extending
15466 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
15467 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
15468 Reported by Guido Vranken.
15470 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
15471 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
15472 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
15474 o Major bugfixes (guard selection, backport from 0.2.7.6):
15475 - Actually look at the Guard flag when selecting a new directory
15476 guard. When we implemented the directory guard design, we
15477 accidentally started treating all relays as if they have the Guard
15478 flag during guard selection, leading to weaker anonymity and worse
15479 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
15482 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
15483 - If OpenSSL fails to generate an RSA key, do not retain a dangling
15484 pointer to the previous (uninitialized) key value. The impact here
15485 should be limited to a difficult-to-trigger crash, if OpenSSL is
15486 running an engine that makes key generation failures possible, or
15487 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
15488 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
15491 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
15492 - Fix an integer underflow bug when comparing malformed Tor
15493 versions. This bug could crash Tor when built with
15494 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15495 0.2.9.8, which were built with -ftrapv by default. In other cases
15496 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15497 on 0.0.8pre1. Found by OSS-Fuzz.
15499 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
15500 - Make memwipe() do nothing when passed a NULL pointer or buffer of
15501 zero size. Check size argument to memwipe() for underflow. Fixes
15502 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
15505 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
15506 - Make Tor survive errors involving connections without a
15507 corresponding event object. Previously we'd fail with an
15508 assertion; now we produce a log message. Related to bug 16248.
15510 o Minor features (geoip):
15511 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15514 o Minor bugfixes (compilation, backport from 0.2.7.6):
15515 - Fix a compilation warning with Clang 3.6: Do not check the
15516 presence of an address which can never be NULL. Fixes bug 17781.
15518 o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
15519 - Check for failures from crypto_early_init, and refuse to continue.
15520 A previous typo meant that we could keep going with an
15521 uninitialized crypto library, and would have OpenSSL initialize
15522 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
15523 when implementing ticket 4900. Patch by "teor".
15525 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
15526 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
15527 a client authorized hidden service. Fixes bug 15823; bugfix
15531 Changes in version 0.2.4.28 - 2017-03-03
15532 Tor 0.2.4.28 backports a number of security fixes from later Tor
15533 releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
15534 this release, if for some reason they cannot upgrade to a later
15537 Note that support for Tor 0.2.4.x is ending soon: we will not issue
15538 any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
15539 a Tor release series with long-term support, we recommend Tor 0.2.9.x.
15541 o Directory authority changes (backport from 0.2.8.5-rc):
15542 - Urras is no longer a directory authority. Closes ticket 19271.
15544 o Directory authority changes (backport from 0.2.9.2-alpha):
15545 - The "Tonga" bridge authority has been retired; the new bridge
15546 authority is "Bifroest". Closes tickets 19728 and 19690.
15548 o Directory authority key updates (backport from 0.2.8.1-alpha):
15549 - Update the V3 identity key for the dannenberg directory authority:
15550 it was changed on 18 November 2015. Closes task 17906. Patch
15553 o Major features (security fixes, backport from 0.2.9.4-alpha):
15554 - Prevent a class of security bugs caused by treating the contents
15555 of a buffer chunk as if they were a NUL-terminated string. At
15556 least one such bug seems to be present in all currently used
15557 versions of Tor, and would allow an attacker to remotely crash
15558 most Tor instances, especially those compiled with extra compiler
15559 hardening. With this defense in place, such bugs can't crash Tor,
15560 though we should still fix them as they occur. Closes ticket
15561 20384 (TROVE-2016-10-001).
15563 o Major bugfixes (parsing, security, backport from 0.2.9.8):
15564 - Fix a bug in parsing that could cause clients to read a single
15565 byte past the end of an allocated region. This bug could be used
15566 to cause hardened clients (built with --enable-expensive-hardening)
15567 to crash if they tried to visit a hostile hidden service. Non-
15568 hardened clients are only affected depending on the details of
15569 their platform's memory allocator. Fixes bug 21018; bugfix on
15570 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15571 2016-12-002 and as CVE-2016-1254.
15573 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
15574 - Fix an error that could cause us to read 4 bytes before the
15575 beginning of an openssl string. This bug could be used to cause
15576 Tor to crash on systems with unusual malloc implementations, or
15577 systems with unusual hardening installed. Fixes bug 17404; bugfix
15580 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
15581 - Avoid a difficult-to-trigger heap corruption attack when extending
15582 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
15583 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
15584 Reported by Guido Vranken.
15586 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
15587 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
15588 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
15590 o Major bugfixes (guard selection, backport from 0.2.7.6):
15591 - Actually look at the Guard flag when selecting a new directory
15592 guard. When we implemented the directory guard design, we
15593 accidentally started treating all relays as if they have the Guard
15594 flag during guard selection, leading to weaker anonymity and worse
15595 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
15598 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
15599 - If OpenSSL fails to generate an RSA key, do not retain a dangling
15600 pointer to the previous (uninitialized) key value. The impact here
15601 should be limited to a difficult-to-trigger crash, if OpenSSL is
15602 running an engine that makes key generation failures possible, or
15603 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
15604 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
15607 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
15608 - Fix an integer underflow bug when comparing malformed Tor
15609 versions. This bug could crash Tor when built with
15610 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15611 0.2.9.8, which were built with -ftrapv by default. In other cases
15612 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15613 on 0.0.8pre1. Found by OSS-Fuzz.
15615 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
15616 - Make memwipe() do nothing when passed a NULL pointer or buffer of
15617 zero size. Check size argument to memwipe() for underflow. Fixes
15618 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
15621 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
15622 - Make Tor survive errors involving connections without a
15623 corresponding event object. Previously we'd fail with an
15624 assertion; now we produce a log message. Related to bug 16248.
15626 o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
15627 - Make it harder for attackers to overload hidden services with
15628 introductions, by blocking multiple introduction requests on the
15629 same circuit. Resolves ticket 15515.
15631 o Minor features (geoip):
15632 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15635 o Minor bugfixes (compilation, backport from 0.2.7.6):
15636 - Fix a compilation warning with Clang 3.6: Do not check the
15637 presence of an address which can never be NULL. Fixes bug 17781.
15639 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
15640 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
15641 a client authorized hidden service. Fixes bug 15823; bugfix
15645 Changes in version 0.3.0.4-rc - 2017-03-01
15646 Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
15647 0.3.0 release series, and introduces a few reliability features to
15648 keep them from coming back.
15650 This is the first release candidate in the Tor 0.3.0 series. If we
15651 find no new bugs or regressions here, the first stable 0.3.0 release
15652 will be nearly identical to it.
15654 o Major bugfixes (bridges):
15655 - When the same bridge is configured multiple times with the same
15656 identity, but at different address:port combinations, treat those
15657 bridge instances as separate guards. This fix restores the ability
15658 of clients to configure the same bridge with multiple pluggable
15659 transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
15661 o Major bugfixes (hidden service directory v3):
15662 - Stop crashing on a failed v3 hidden service descriptor lookup
15663 failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
15665 o Major bugfixes (parsing):
15666 - When parsing a malformed content-length field from an HTTP
15667 message, do not read off the end of the buffer. This bug was a
15668 potential remote denial-of-service attack against Tor clients and
15669 relays. A workaround was released in October 2016, to prevent this
15670 bug from crashing Tor. This is a fix for the underlying issue,
15671 which should no longer matter (if you applied the earlier patch).
15672 Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
15673 using AFL (http://lcamtuf.coredump.cx/afl/).
15674 - Fix an integer underflow bug when comparing malformed Tor
15675 versions. This bug could crash Tor when built with
15676 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15677 0.2.9.8, which were built with -ftrapv by default. In other cases
15678 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15679 on 0.0.8pre1. Found by OSS-Fuzz.
15681 o Minor feature (protocol versioning):
15682 - Add new protocol version for proposal 224. HSIntro now advertises
15683 version "3-4" and HSDir version "1-2". Fixes ticket 20656.
15685 o Minor features (directory authorities):
15686 - Directory authorities now reject descriptors that claim to be
15687 malformed versions of Tor. Helps prevent exploitation of
15689 - Reject version numbers with components that exceed INT32_MAX.
15690 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
15691 Fixes bug 21450; bugfix on 0.0.8pre1.
15692 - Directory authorities now reject relays running versions
15693 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
15694 suffer from bug 20499 and don't keep their consensus cache
15695 up-to-date. Resolves ticket 20509.
15697 o Minor features (geoip):
15698 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15701 o Minor features (reliability, crash):
15702 - Try better to detect problems in buffers where they might grow (or
15703 think they have grown) over 2 GB in size. Diagnostic for
15706 o Minor features (testing):
15707 - During 'make test-network-all', if tor logs any warnings, ask
15708 chutney to output them. Requires a recent version of chutney with
15709 the 21572 patch. Implements 21570.
15711 o Minor bugfixes (certificate expiration time):
15712 - Avoid using link certificates that don't become valid till some
15713 time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
15715 o Minor bugfixes (code correctness):
15716 - Repair a couple of (unreachable or harmless) cases of the risky
15717 comparison-by-subtraction pattern that caused bug 21278.
15718 - Remove a redundant check for the UseEntryGuards option from the
15719 options_transition_affects_guards() function. Fixes bug 21492;
15720 bugfix on 0.3.0.1-alpha.
15722 o Minor bugfixes (directory mirrors):
15723 - Allow relays to use directory mirrors without a DirPort: these
15724 relays need to be contacted over their ORPorts using a begindir
15725 connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
15726 - Clarify the message logged when a remote relay is unexpectedly
15727 missing an ORPort or DirPort: users were confusing this with a
15728 local port. Fixes another case of bug 20711; bugfix
15731 o Minor bugfixes (guards):
15732 - Don't warn about a missing guard state on timeout-measurement
15733 circuits: they aren't supposed to be using guards. Fixes an
15734 instance of bug 21007; bugfix on 0.3.0.1-alpha.
15735 - Silence a BUG() warning when attempting to use a guard whose
15736 descriptor we don't know, and make this scenario less likely to
15737 happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
15739 o Minor bugfixes (hidden service):
15740 - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
15741 cells. Previously, we were using sizeof() on a pointer, instead of
15742 the real destination buffer. Fortunately, that value was only used
15743 to double-check that there was enough room--which was already
15744 enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
15746 o Minor bugfixes (testing):
15747 - Fix Raspbian build issues related to missing socket errno in
15748 test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
15750 - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
15751 actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
15752 - Use bash in src/test/test-network.sh. This ensures we reliably
15753 call chutney's newer tools/test-network.sh when available. Fixes
15754 bug 21562; bugfix on 0.2.9.1-alpha.
15757 - Small fixes to the fuzzing documentation. Closes ticket 21472.
15760 Changes in version 0.2.9.10 - 2017-03-01
15761 Tor 0.2.9.10 backports a security fix from later Tor release. It also
15762 includes fixes for some major issues affecting directory authorities,
15763 LibreSSL compatibility, and IPv6 correctness.
15765 The Tor 0.2.9.x release series is now marked as a long-term-support
15766 series. We intend to backport security fixes to 0.2.9.x until at
15767 least January of 2020.
15769 o Major bugfixes (directory authority, 0.3.0.3-alpha):
15770 - During voting, when marking a relay as a probable sybil, do not
15771 clear its BadExit flag: sybils can still be bad in other ways
15772 too. (We still clear the other flags.) Fixes bug 21108; bugfix
15775 o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
15776 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
15777 any IPv6 addresses. Instead, only reject a port over IPv6 if the
15778 exit policy rejects that port on more than an IPv6 /16 of
15779 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
15780 which rejected a relay's own IPv6 address by default. Fixes bug
15781 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
15783 o Major bugfixes (parsing, also in 0.3.0.4-rc):
15784 - Fix an integer underflow bug when comparing malformed Tor
15785 versions. This bug could crash Tor when built with
15786 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15787 0.2.9.8, which were built with -ftrapv by default. In other cases
15788 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15789 on 0.0.8pre1. Found by OSS-Fuzz.
15791 o Minor features (directory authorities, also in 0.3.0.4-rc):
15792 - Directory authorities now reject descriptors that claim to be
15793 malformed versions of Tor. Helps prevent exploitation of
15795 - Reject version numbers with components that exceed INT32_MAX.
15796 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
15797 Fixes bug 21450; bugfix on 0.0.8pre1.
15799 o Minor features (geoip):
15800 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15803 o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
15804 - Autoconf now checks to determine if OpenSSL structures are opaque,
15805 instead of explicitly checking for OpenSSL version numbers. Part
15807 - Support building with recent LibreSSL code that uses opaque
15808 structures. Closes ticket 21359.
15810 o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
15811 - Repair a couple of (unreachable or harmless) cases of the risky
15812 comparison-by-subtraction pattern that caused bug 21278.
15814 o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
15815 - The tor-resolve command line tool now rejects hostnames over 255
15816 characters in length. Previously, it would silently truncate them,
15817 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
15818 Patch by "junglefowl".
15821 Changes in version 0.3.0.3-alpha - 2017-02-03
15822 Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
15823 0.3.0.x development series, including some that could cause
15824 authorities to behave badly. There is also a fix for a longstanding
15825 bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
15826 includes some smaller features and bugfixes.
15828 The Tor 0.3.0.x release series is now in patch-freeze: no additional
15829 features will be considered for inclusion in 0.3.0.x. We suspect that
15830 some bugs will probably remain, however, and we encourage people to
15833 o Major bugfixes (directory authority):
15834 - During voting, when marking a relay as a probable sybil, do not
15835 clear its BadExit flag: sybils can still be bad in other ways
15836 too. (We still clear the other flags.) Fixes bug 21108; bugfix
15838 - When deciding whether we have just found a router to be reachable,
15839 do not penalize it for not having performed an Ed25519 link
15840 handshake if it does not claim to support an Ed25519 handshake.
15841 Previously, we would treat such relays as non-running. Fixes bug
15842 21107; bugfix on 0.3.0.1-alpha.
15844 o Major bugfixes (entry guards):
15845 - Stop trying to build circuits through entry guards for which we
15846 have no descriptor. Also, stop crashing in the case that we *do*
15847 accidentally try to build a circuit in such a state. Fixes bug
15848 21242; bugfix on 0.3.0.1-alpha.
15850 o Major bugfixes (IPv6 Exits):
15851 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
15852 any IPv6 addresses. Instead, only reject a port over IPv6 if the
15853 exit policy rejects that port on more than an IPv6 /16 of
15854 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
15855 which rejected a relay's own IPv6 address by default. Fixes bug
15856 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
15858 o Minor feature (client):
15859 - Enable IPv6 traffic on the SocksPort by default. To disable this,
15860 a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
15862 o Minor feature (fallback scripts):
15863 - Add a check_existing mode to updateFallbackDirs.py, which checks
15864 if fallbacks in the hard-coded list are working. Closes ticket
15865 20174. Patch by haxxpop.
15867 o Minor features (ciphersuite selection):
15868 - Clients now advertise a list of ciphersuites closer to the ones
15869 preferred by Firefox. Closes part of ticket 15426.
15870 - Allow relays to accept a wider range of ciphersuites, including
15871 chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
15873 o Minor features (controller, configuration):
15874 - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
15875 and so on, now comes with a __*Port variant that will not be saved
15876 to the torrc file by the controller's SAVECONF command. This
15877 change allows TorBrowser to set up a single-use domain socket for
15878 each time it launches Tor. Closes ticket 20956.
15879 - The GETCONF command can now query options that may only be
15880 meaningful in context-sensitive lists. This allows the controller
15881 to query the mixed SocksPort/__SocksPort style options introduced
15882 in feature 20956. Implements ticket 21300.
15884 o Minor features (portability, compilation):
15885 - Autoconf now checks to determine if OpenSSL structures are opaque,
15886 instead of explicitly checking for OpenSSL version numbers. Part
15888 - Support building with recent LibreSSL code that uses opaque
15889 structures. Closes ticket 21359.
15891 o Minor features (relay):
15892 - We now allow separation of exit and relay traffic to different
15893 source IP addresses, using the OutboundBindAddressExit and
15894 OutboundBindAddressOR options respectively. Closes ticket 17975.
15895 Written by Michael Sonntag.
15897 o Minor bugfix (logging):
15898 - Don't recommend the use of Tor2web in non-anonymous mode.
15899 Recommending Tor2web is a bad idea because the client loses all
15900 anonymity. Tor2web should only be used in specific cases by users
15901 who *know* and understand the issues. Fixes bug 21294; bugfix
15904 o Minor bugfixes (client):
15905 - Always recover from failures in extend_info_from_node(), in an
15906 attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
15907 bugfix on 0.2.3.1-alpha.
15909 o Minor bugfixes (client, entry guards):
15910 - Fix a bug warning (with backtrace) when we fail a channel that
15911 circuits to fallback directories on it. Fixes bug 21128; bugfix
15913 - Fix a spurious bug warning (with backtrace) when removing an
15914 expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
15915 - Fix a bug of the new guard algorithm where tor could stall for up
15916 to 10 minutes before retrying a guard after a long period of no
15917 network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
15918 - Do not try to build circuits until we have descriptors for our
15919 primary entry guards. Related to fix for bug 21242.
15921 o Minor bugfixes (configure, autoconf):
15922 - Rename the configure option --enable-expensive-hardening to
15923 --enable-fragile-hardening. Expensive hardening makes the tor
15924 daemon abort when some kinds of issues are detected. Thus, it
15925 makes tor more at risk of remote crashes but safer against RCE or
15926 heartbleed bug category. We now try to explain this issue in a
15927 message from the configure script. Fixes bug 21290; bugfix
15930 o Minor bugfixes (controller):
15931 - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
15932 20824; bugfix on 0.3.0.1-alpha.
15934 o Minor bugfixes (hidden service):
15935 - Clean up the code for expiring intro points with no associated
15936 circuits. It was causing, rarely, a service with some expiring
15937 introduction points to not open enough additional introduction
15938 points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
15939 - Stop setting the torrc option HiddenServiceStatistics to "0" just
15940 because we're not a bridge or relay. Instead, we preserve whatever
15941 value the user set (or didn't set). Fixes bug 21150; bugfix
15943 - Resolve two possible underflows which could lead to creating and
15944 closing a lot of introduction point circuits in a non-stop loop.
15945 Fixes bug 21302; bugfix on 0.2.7.2-alpha.
15947 o Minor bugfixes (portability):
15948 - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
15949 It is supported by OpenBSD itself, and also by most OpenBSD
15950 variants (such as Bitrig). Fixes bug 20980; bugfix
15952 - When mapping a file of length greater than SIZE_MAX, do not
15953 silently truncate its contents. This issue could occur on 32 bit
15954 systems with large file support and files which are larger than 4
15955 GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
15957 o Minor bugfixes (tor-resolve):
15958 - The tor-resolve command line tool now rejects hostnames over 255
15959 characters in length. Previously, it would silently truncate them,
15960 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
15961 Patch by "junglefowl".
15963 o Minor bugfixes (Windows services):
15964 - Be sure to initialize the monotonic time subsystem before using
15965 it, even when running as an NT service. Fixes bug 21356; bugfix
15969 Changes in version 0.3.0.2-alpha - 2017-01-23
15970 Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
15971 cause relays and clients to crash, even if they were not built with
15972 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
15973 versions, and also affects 0.3.0.1-alpha: all relays running an affected
15974 version should upgrade.
15976 Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
15977 time-to-live values, makes directory authorities enforce the 1-to-1
15978 mapping of relay RSA identity keys to ED25519 identity keys, fixes a
15979 client-side onion service reachability bug, does better at selecting
15980 the set of fallback directories, and more.
15982 o Major bugfixes (security, also in 0.2.9.9):
15983 - Downgrade the "-ftrapv" option from "always on" to "only on when
15984 --enable-expensive-hardening is provided." This hardening option, like
15985 others, can turn survivable bugs into crashes--and having it on by
15986 default made a (relatively harmless) integer overflow bug into a
15987 denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
15990 o Major features (security):
15991 - Change the algorithm used to decide DNS TTLs on client and server
15992 side, to better resist DNS-based correlation attacks like the
15993 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
15994 Feamster. Now relays only return one of two possible DNS TTL
15995 values, and clients are willing to believe DNS TTL values up to 3
15996 hours long. Closes ticket 19769.
15998 o Major features (directory authority, security):
15999 - The default for AuthDirPinKeys is now 1: directory authorities
16000 will reject relays where the RSA identity key matches a previously
16001 seen value, but the Ed25519 key has changed. Closes ticket 18319.
16003 o Major bugfixes (client, guard, crash):
16004 - In circuit_get_global_origin_list(), return the actual list of
16005 origin circuits. The previous version of this code returned the
16006 list of all the circuits, and could have caused strange bugs,
16007 including possible crashes. Fixes bug 21118; bugfix
16010 o Major bugfixes (client, onion service, also in 0.2.9.9):
16011 - Fix a client-side onion service reachability bug, where multiple
16012 socks requests to an onion service (or a single slow request)
16013 could cause us to mistakenly mark some of the service's
16014 introduction points as failed, and we cache that failure so
16015 eventually we run out and can't reach the service. Also resolves a
16016 mysterious "Remote server sent bogus reason code 65021" log
16017 warning. The bug was introduced in ticket 17218, where we tried to
16018 remember the circuit end reason as a uint16_t, which mangled
16019 negative values. Partially fixes bug 21056 and fixes bug 20307;
16020 bugfix on 0.2.8.1-alpha.
16022 o Major bugfixes (DNS):
16023 - Fix a bug that prevented exit nodes from caching DNS records for
16024 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
16026 o Minor features (controller):
16027 - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
16028 shared-random values to the controller. Closes ticket 19925.
16030 o Minor features (entry guards):
16031 - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
16032 break regression tests.
16033 - Require UseEntryGuards when UseBridges is set, in order to make
16034 sure bridges aren't bypassed. Resolves ticket 20502.
16036 o Minor features (fallback directories):
16037 - Select 200 fallback directories for each release. Closes
16039 - Allow 3 fallback relays per operator, which is safe now that we
16040 are choosing 200 fallback relays. Closes ticket 20912.
16041 - Exclude relays affected by bug 20499 from the fallback list.
16042 Exclude relays from the fallback list if they are running versions
16043 known to be affected by bug 20499, or if in our tests they deliver
16044 a stale consensus (i.e. one that expired more than 24 hours ago).
16045 Closes ticket 20539.
16046 - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
16048 - Require fallback directories to have the same address and port for
16049 7 days (now that we have enough relays with this stability).
16050 Relays whose OnionOO stability timer is reset on restart by bug
16051 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
16052 this issue. Closes ticket 20880; maintains short-term fix
16054 - Require fallbacks to have flags for 90% of the time (weighted
16055 decaying average), rather than 95%. This allows at least 73% of
16056 clients to bootstrap in the first 5 seconds without contacting an
16057 authority. Part of ticket 18828.
16058 - Annotate updateFallbackDirs.py with the bandwidth and consensus
16059 weight for each candidate fallback. Closes ticket 20878.
16060 - Make it easier to change the output sort order of fallbacks.
16061 Closes ticket 20822.
16062 - Display the relay fingerprint when downloading consensuses from
16063 fallbacks. Closes ticket 20908.
16065 o Minor features (geoip, also in 0.2.9.9):
16066 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
16069 o Minor features (next-gen onion service directories):
16070 - Remove the "EnableOnionServicesV3" consensus parameter that we
16071 introduced in 0.3.0.1-alpha: relays are now always willing to act
16072 as v3 onion service directories. Resolves ticket 19899.
16074 o Minor features (linting):
16075 - Enhance the changes file linter to warn on Tor versions that are
16076 prefixed with "tor-". Closes ticket 21096.
16078 o Minor features (logging):
16079 - In several places, describe unset ed25519 keys as "<unset>",
16080 rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
16082 o Minor bugfix (control protocol):
16083 - The reply to a "GETINFO config/names" request via the control
16084 protocol now spells the type "Dependent" correctly. This is a
16085 breaking change in the control protocol. (The field seems to be
16086 ignored by the most common known controllers.) Fixes bug 18146;
16087 bugfix on 0.1.1.4-alpha.
16089 o Minor bugfixes (bug resilience):
16090 - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
16091 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
16092 Hans Jerry Illikainen.
16094 o Minor bugfixes (build):
16095 - Replace obsolete Autoconf macros with their modern equivalent and
16096 prevent similar issues in the future. Fixes bug 20990; bugfix
16099 o Minor bugfixes (client, guards):
16100 - Fix bug where Tor would think that there are circuits waiting for
16101 better guards even though those circuits have been freed. Fixes
16102 bug 21142; bugfix on 0.3.0.1-alpha.
16104 o Minor bugfixes (config):
16105 - Don't assert on startup when trying to get the options list and
16106 LearnCircuitBuildTimeout is set to 0: we are currently parsing the
16107 options so of course they aren't ready yet. Fixes bug 21062;
16108 bugfix on 0.2.9.3-alpha.
16110 o Minor bugfixes (controller):
16111 - Make the GETINFO interface for inquiring about entry guards
16112 support the new guards backend. Fixes bug 20823; bugfix
16115 o Minor bugfixes (dead code):
16116 - Remove a redundant check for PidFile changes at runtime in
16117 options_transition_allowed(): this check is already performed
16118 regardless of whether the sandbox is active. Fixes bug 21123;
16119 bugfix on 0.2.5.4-alpha.
16121 o Minor bugfixes (documentation):
16122 - Update the tor manual page to document every option that can not
16123 be changed while tor is running. Fixes bug 21122.
16125 o Minor bugfixes (fallback directories):
16126 - Stop failing when a relay has no uptime data in
16127 updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
16128 - Avoid checking fallback candidates' DirPorts if they are down in
16129 OnionOO. When a relay operator has multiple relays, this
16130 prioritizes relays that are up over relays that are down. Fixes
16131 bug 20926; bugfix on 0.2.8.3-alpha.
16132 - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
16133 Fixes bug 20877; bugfix on 0.2.8.3-alpha.
16135 o Minor bugfixes (guards, bootstrapping):
16136 - When connecting to a directory guard during bootstrap, do not mark
16137 the guard as successful until we receive a good-looking directory
16138 response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
16140 o Minor bugfixes (onion services):
16141 - Fix the config reload pruning of old vs new services so it
16142 actually works when both ephemeral and non-ephemeral services are
16143 configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
16144 - Allow the number of introduction points to be as low as 0, rather
16145 than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
16147 o Minor bugfixes (IPv6):
16148 - Make IPv6-using clients try harder to find an IPv6 directory
16149 server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
16150 - When IPv6 addresses have not been downloaded yet (microdesc
16151 consensus documents don't list relay IPv6 addresses), use hard-
16152 coded addresses for authorities, fallbacks, and configured
16153 bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
16154 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
16156 o Minor bugfixes (memory leaks):
16157 - Fix a memory leak when configuring hidden services. Fixes bug
16158 20987; bugfix on 0.3.0.1-alpha.
16160 o Minor bugfixes (portability, also in 0.2.9.9):
16161 - Avoid crashing when Tor is built using headers that contain
16162 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
16163 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
16165 - Fix Libevent detection on platforms without Libevent 1 headers
16166 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
16168 o Minor bugfixes (relay):
16169 - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
16170 initializing the keys would reset the DataDirectory to 0700
16171 instead of 0750 even if DataDirectoryGroupReadable was set to 1.
16172 Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
16174 o Minor bugfixes (testing):
16175 - Remove undefined behavior from the backtrace generator by removing
16176 its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
16178 o Minor bugfixes (unit tests):
16179 - Allow the unit tests to pass even when DNS lookups of bogus
16180 addresses do not fail as expected. Fixes bug 20862 and 20863;
16181 bugfix on unit tests introduced in 0.2.8.1-alpha
16182 through 0.2.9.4-alpha.
16184 o Code simplification and refactoring:
16185 - Refactor code to manipulate global_origin_circuit_list into
16186 separate functions. Closes ticket 20921.
16188 o Documentation (formatting):
16189 - Clean up formatting of tor.1 man page and HTML doc, where <pre>
16190 blocks were incorrectly appearing. Closes ticket 20885.
16192 o Documentation (man page):
16193 - Clarify many options in tor.1 and add some min/max values for
16194 HiddenService options. Closes ticket 21058.
16197 Changes in version 0.2.9.9 - 2017-01-23
16198 Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
16199 cause relays and clients to crash, even if they were not built with
16200 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
16201 versions, and also affects 0.3.0.1-alpha: all relays running an affected
16202 version should upgrade.
16204 This release also resolves a client-side onion service reachability
16205 bug, and resolves a pair of small portability issues.
16207 o Major bugfixes (security):
16208 - Downgrade the "-ftrapv" option from "always on" to "only on when
16209 --enable-expensive-hardening is provided." This hardening option,
16210 like others, can turn survivable bugs into crashes -- and having
16211 it on by default made a (relatively harmless) integer overflow bug
16212 into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
16213 bugfix on 0.2.9.1-alpha.
16215 o Major bugfixes (client, onion service):
16216 - Fix a client-side onion service reachability bug, where multiple
16217 socks requests to an onion service (or a single slow request)
16218 could cause us to mistakenly mark some of the service's
16219 introduction points as failed, and we cache that failure so
16220 eventually we run out and can't reach the service. Also resolves a
16221 mysterious "Remote server sent bogus reason code 65021" log
16222 warning. The bug was introduced in ticket 17218, where we tried to
16223 remember the circuit end reason as a uint16_t, which mangled
16224 negative values. Partially fixes bug 21056 and fixes bug 20307;
16225 bugfix on 0.2.8.1-alpha.
16227 o Minor features (geoip):
16228 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
16231 o Minor bugfixes (portability):
16232 - Avoid crashing when Tor is built using headers that contain
16233 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
16234 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
16236 - Fix Libevent detection on platforms without Libevent 1 headers
16237 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
16240 Changes in version 0.3.0.1-alpha - 2016-12-19
16241 Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
16242 series. It strengthens Tor's link and circuit handshakes by
16243 identifying relays by their Ed25519 keys, improves the algorithm that
16244 clients use to choose and maintain their list of guards, and includes
16245 additional backend support for the next-generation hidden service
16246 design. It also contains numerous other small features and
16247 improvements to security, correctness, and performance.
16249 Below are the changes since 0.2.9.8.
16251 o Major features (guard selection algorithm):
16252 - Tor's guard selection algorithm has been redesigned from the
16253 ground up, to better support unreliable networks and restrictive
16254 sets of entry nodes, and to better resist guard-capture attacks by
16255 hostile local networks. Implements proposal 271; closes
16258 o Major features (next-generation hidden services):
16259 - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
16260 prop224 aka "Next Generation Hidden Services". Service and clients
16261 don't use this functionality yet. Closes ticket 19043. Based on
16262 initial code by Alec Heifetz.
16263 - Relays now support the HSDir version 3 protocol, so that they can
16264 can store and serve v3 descriptors. This is part of the next-
16265 generation onion service work detailed in proposal 224. Closes
16268 o Major features (protocol, ed25519 identity keys):
16269 - Relays now use Ed25519 to prove their Ed25519 identities and to
16270 one another, and to clients. This algorithm is faster and more
16271 secure than the RSA-based handshake we've been doing until now.
16272 Implements the second big part of proposal 220; Closes
16274 - Clients now support including Ed25519 identity keys in the EXTEND2
16275 cells they generate. By default, this is controlled by a consensus
16276 parameter, currently disabled. You can turn this feature on for
16277 testing by setting ExtendByEd25519ID in your configuration. This
16278 might make your traffic appear different than the traffic
16279 generated by other users, however. Implements part of ticket
16280 15056; part of proposal 220.
16281 - Relays now understand requests to extend to other relays by their
16282 Ed25519 identity keys. When an Ed25519 identity key is included in
16283 an EXTEND2 cell, the relay will only extend the circuit if the
16284 other relay can prove ownership of that identity. Implements part
16285 of ticket 15056; part of proposal 220.
16287 o Major bugfixes (scheduler):
16288 - Actually compare circuit policies in ewma_cmp_cmux(). This bug
16289 caused the channel scheduler to behave more or less randomly,
16290 rather than preferring channels with higher-priority circuits.
16291 Fixes bug 20459; bugfix on 0.2.6.2-alpha.
16293 o Minor features (controller):
16294 - When HSFETCH arguments cannot be parsed, say "Invalid argument"
16295 rather than "unrecognized." Closes ticket 20389; patch from
16298 o Minor features (diagnostic, directory client):
16299 - Warn when we find an unexpected inconsistency in directory
16300 download status objects. Prevents some negative consequences of
16303 o Minor features (directory authority):
16304 - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
16305 default) to control whether authorities should try to probe relays
16306 by their Ed25519 link keys. This option will go away in a few
16307 releases--unless we encounter major trouble in our ed25519 link
16308 protocol rollout, in which case it will serve as a safety option.
16310 o Minor features (directory cache):
16311 - Relays and bridges will now refuse to serve the consensus they
16312 have if they know it is too old for a client to use. Closes
16315 o Minor features (ed25519 link handshake):
16316 - Advertise support for the ed25519 link handshake using the
16317 subprotocol-versions mechanism, so that clients can tell which
16318 relays can identity themselves by Ed25519 ID. Closes ticket 20552.
16320 o Minor features (fingerprinting resistance, authentication):
16321 - Extend the length of RSA keys used for TLS link authentication to
16322 2048 bits. (These weren't used for forward secrecy; for forward
16323 secrecy, we used P256.) Closes ticket 13752.
16325 o Minor features (infrastructure):
16326 - Implement smartlist_add_strdup() function. Replaces the use of
16327 smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
16329 o Minor bugfixes (client):
16330 - When clients that use bridges start up with a cached consensus on
16331 disk, they were ignoring it and downloading a new one. Now they
16332 use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
16334 o Minor bugfixes (configuration):
16335 - Accept non-space whitespace characters after the severity level in
16336 the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
16337 - Support "TByte" and "TBytes" units in options given in bytes.
16338 "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
16339 supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
16341 o Minor bugfixes (consensus weight):
16342 - Add new consensus method that initializes bw weights to 1 instead
16343 of 0. This prevents a zero weight from making it all the way to
16344 the end (happens in small testing networks) and causing an error.
16345 Fixes bug 14881; bugfix on 0.2.2.17-alpha.
16347 o Minor bugfixes (descriptors):
16348 - Correctly recognise downloaded full descriptors as valid, even
16349 when using microdescriptors as circuits. This affects clients with
16350 FetchUselessDescriptors set, and may affect directory authorities.
16351 Fixes bug 20839; bugfix on 0.2.3.2-alpha.
16353 o Minor bugfixes (directory system):
16354 - Download all consensus flavors, descriptors, and authority
16355 certificates when FetchUselessDescriptors is set, regardless of
16356 whether tor is a directory cache or not. Fixes bug 20667; bugfix
16357 on all recent tor versions.
16358 - Bridges and relays now use microdescriptors (like clients do)
16359 rather than old-style router descriptors. Now bridges will blend
16360 in with clients in terms of the circuits they build. Fixes bug
16361 6769; bugfix on 0.2.3.2-alpha.
16363 o Minor bugfixes (ed25519 certificates):
16364 - Correctly interpret ed25519 certificates that would expire some
16365 time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
16367 o Minor bugfixes (hidden services):
16368 - Stop ignoring misconfigured hidden services. Instead, refuse to
16369 start tor until the misconfigurations have been corrected. Fixes
16370 bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
16373 o Minor bugfixes (memory leak at exit):
16374 - Fix a small harmless memory leak at exit of the previously unused
16375 RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
16378 o Minor bugfixes (util):
16379 - When finishing writing a file to disk, if we were about to replace
16380 the file with the temporary file created before and we fail to
16381 replace it, remove the temporary file so it doesn't stay on disk.
16382 Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
16384 o Minor bugfixes (Windows):
16385 - Check for getpagesize before using it to mmap files. This fixes
16386 compilation in some MinGW environments. Fixes bug 20530; bugfix on
16387 0.1.2.1-alpha. Reported by "ice".
16389 o Code simplification and refactoring:
16390 - Abolish all global guard context in entrynodes.c; replace with new
16391 guard_selection_t structure as preparation for proposal 271.
16392 Closes ticket 19858.
16393 - Introduce rend_service_is_ephemeral() that tells if given onion
16394 service is ephemeral. Replace unclear NULL-checkings for service
16395 directory with this function. Closes ticket 20526.
16396 - Extract magic numbers in circuituse.c into defined variables.
16397 - Refactor circuit_is_available_for_use to remove unnecessary check.
16398 - Refactor circuit_predict_and_launch_new for readability and
16399 testability. Closes ticket 18873.
16400 - Refactor large if statement in purpose_needs_anonymity to use
16401 switch statement instead. Closes part of ticket 20077.
16402 - Refactor the hashing API to return negative values for errors, as
16403 is done as throughout the codebase. Closes ticket 20717.
16404 - Remove data structures that were used to index or_connection
16405 objects by their RSA identity digests. These structures are fully
16406 redundant with the similar structures used in the
16407 channel abstraction.
16408 - Remove duplicate code in the channel_write_*cell() functions.
16409 Closes ticket 13827; patch from Pingl.
16410 - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
16411 use only purpose_needs_anonymity. Closes part of ticket 20077.
16412 - The code to generate and parse EXTEND and EXTEND2 cells has been
16413 replaced with code automatically generated by the
16417 - Include the "TBits" unit in Tor's man page. Fixes part of bug
16418 20622; bugfix on 0.2.5.1-alpha.
16419 - Change '1' to 'weight_scale' in consensus bw weights calculation
16420 comments, as that is reality. Closes ticket 20273. Patch
16422 - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
16423 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
16425 - Stop the man page from incorrectly stating that HiddenServiceDir
16426 must already exist. Fixes 20486.
16427 - Clarify that when ClientRejectInternalAddresses is enabled (which
16428 is the default), multicast DNS hostnames for machines on the local
16429 network (of the form *.local) are also rejected. Closes
16432 o Removed features:
16433 - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
16434 limit for relays running on a single IP applies to authority IP
16435 addresses as well as to non-authority IP addresses. Closes
16437 - The UseDirectoryGuards torrc option no longer exists: all users
16438 that use entry guards will also use directory guards. Related to
16439 proposal 271; implements part of ticket 20831.
16442 - New unit tests for tor_htonll(). Closes ticket 19563. Patch
16443 from "overcaffeinated".
16444 - Perform the coding style checks when running the tests and fail
16445 when coding style violations are found. Closes ticket 5500.
16446 - Add tests for networkstatus_compute_bw_weights_v10.
16447 - Add unit tests circuit_predict_and_launch_new.
16448 - Extract dummy_origin_circuit_new so it can be used by other
16452 Changes in version 0.2.8.12 - 2016-12-19
16453 Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
16454 below) where Tor clients could crash when attempting to visit a
16455 hostile hidden service. Clients are recommended to upgrade as packages
16456 become available for their systems.
16458 It also includes an updated list of fallback directories, backported
16461 Now that the Tor 0.2.9 series is stable, only major bugfixes will be
16462 backported to 0.2.8 in the future.
16464 o Major bugfixes (parsing, security, backported from 0.2.9.8):
16465 - Fix a bug in parsing that could cause clients to read a single
16466 byte past the end of an allocated region. This bug could be used
16467 to cause hardened clients (built with --enable-expensive-hardening)
16468 to crash if they tried to visit a hostile hidden service. Non-
16469 hardened clients are only affected depending on the details of
16470 their platform's memory allocator. Fixes bug 21018; bugfix on
16471 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16472 2016-12-002 and as CVE-2016-1254.
16474 o Minor features (fallback directory list, backported from 0.2.9.8):
16475 - Replace the 81 remaining fallbacks of the 100 originally
16476 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
16477 fallbacks (123 new, 54 existing, 27 removed) generated in December
16478 2016. Resolves ticket 20170.
16480 o Minor features (geoip, backported from 0.2.9.7-rc):
16481 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
16485 Changes in version 0.2.9.8 - 2016-12-19
16486 Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
16488 The Tor 0.2.9 series makes mandatory a number of security features
16489 that were formerly optional. It includes support for a new shared-
16490 randomness protocol that will form the basis for next generation
16491 hidden services, includes a single-hop hidden service mode for
16492 optimizing .onion services that don't actually want to be hidden,
16493 tries harder not to overload the directory authorities with excessive
16494 downloads, and supports a better protocol versioning scheme for
16495 improved compatibility with other implementations of the Tor protocol.
16497 And of course, there are numerous other bugfixes and improvements.
16499 This release also includes a fix for a medium-severity issue (bug
16500 21018 below) where Tor clients could crash when attempting to visit a
16501 hostile hidden service. Clients are recommended to upgrade as packages
16502 become available for their systems.
16504 Below are the changes since 0.2.9.7-rc. For a list of all changes
16505 since 0.2.8, see the ReleaseNotes file.
16507 o Major bugfixes (parsing, security):
16508 - Fix a bug in parsing that could cause clients to read a single
16509 byte past the end of an allocated region. This bug could be used
16510 to cause hardened clients (built with --enable-expensive-hardening)
16511 to crash if they tried to visit a hostile hidden service. Non-
16512 hardened clients are only affected depending on the details of
16513 their platform's memory allocator. Fixes bug 21018; bugfix on
16514 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16515 2016-12-002 and as CVE-2016-1254.
16517 o Minor features (fallback directory list):
16518 - Replace the 81 remaining fallbacks of the 100 originally
16519 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
16520 fallbacks (123 new, 54 existing, 27 removed) generated in December
16521 2016. Resolves ticket 20170.
16524 Changes in version 0.2.9.7-rc - 2016-12-12
16525 Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
16526 including a few that had prevented tests from passing on
16529 o Minor features (geoip):
16530 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
16533 o Minor bugfix (build):
16534 - The current Git revision when building from a local repository is
16535 now detected correctly when using git worktrees. Fixes bug 20492;
16536 bugfix on 0.2.3.9-alpha.
16538 o Minor bugfixes (directory authority):
16539 - When computing old Tor protocol line version in protover, we were
16540 looking at 0.2.7.5 twice instead of a specific case for
16541 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
16543 o Minor bugfixes (download scheduling):
16544 - Resolve a "bug" warning when considering a download schedule whose
16545 delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
16547 o Minor bugfixes (logging):
16548 - Downgrade a harmless log message about the
16549 pending_entry_connections list from "warn" to "info". Mitigates
16552 o Minor bugfixes (memory leak):
16553 - Fix a small memory leak when receiving AF_UNIX connections on a
16554 SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
16555 - When moving a signed descriptor object from a source to an
16556 existing destination, free the allocated memory inside that
16557 destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
16559 o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
16560 - Fix a memory leak and use-after-free error when removing entries
16561 from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
16562 0.2.5.5-alpha. Patch from "cypherpunks".
16564 o Minor bugfixes (portability):
16565 - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
16566 Fixes bug 20935; bugfix on 0.2.9.6-rc.
16568 o Minor bugfixes (unit tests):
16569 - Stop expecting NetBSD unit tests to report success for ipfw. Part
16570 of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
16571 - Fix tolerances in unit tests for monotonic time comparisons
16572 between nanoseconds and microseconds. Previously, we accepted a 10
16573 us difference only, which is not realistic on every platform's
16574 clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
16575 - Remove a double-free in the single onion service unit test. Stop
16576 ignoring a return value. Make future changes less error-prone.
16577 Fixes bug 20864; bugfix on 0.2.9.6-rc.
16580 Changes in version 0.2.8.11 - 2016-12-08
16581 Tor 0.2.8.11 backports fixes for additional portability issues that
16582 could prevent Tor from building correctly on OSX Sierra, or with
16583 OpenSSL 1.1. Affected users should upgrade; others can safely stay
16586 o Minor bugfixes (portability):
16587 - Avoid compilation errors when building on OSX Sierra. Sierra began
16588 to support the getentropy() and clock_gettime() APIs, but created
16589 a few problems in doing so. Tor 0.2.9 has a more thorough set of
16590 workarounds; in 0.2.8, we are just using the /dev/urandom and mach
16591 monotonic time interfaces. Fixes bug 20865. Bugfix
16594 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
16595 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
16596 architectures. Closes ticket 20588.
16599 Changes in version 0.2.8.10 - 2016-12-02
16600 Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
16601 unusable after they left standby mode. It also backports fixes for
16602 a few portability issues and a small but problematic memory leak.
16604 o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
16605 - When Tor leaves standby because of a new application request, open
16606 circuits as needed to serve that request. Previously, we would
16607 potentially wait a very long time. Fixes part of bug 19969; bugfix
16610 o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
16611 - Clients now respond to new application stream requests immediately
16612 when they arrive, rather than waiting up to one second before
16613 starting to handle them. Fixes part of bug 19969; bugfix
16616 o Minor bugfixes (portability, backport from 0.2.9.6-rc):
16617 - Work around a bug in the OSX 10.12 SDK that would prevent us from
16618 successfully targeting earlier versions of OSX. Resolves
16621 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
16622 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
16623 20551; bugfix on 0.2.1.1-alpha.
16625 o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
16626 - Work around a memory leak in OpenSSL 1.1 when encoding public
16627 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
16629 o Minor features (geoip):
16630 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
16633 Changes in version 0.2.9.6-rc - 2016-12-02
16634 Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
16635 version. We hope that it will be ready to become stable soon, and we
16636 encourage everyone to test this release. If no showstopper bugs are
16637 found here, the next 0.2.9 release will be stable.
16639 o Major bugfixes (relay, resolver, logging):
16640 - For relays that don't know their own address, avoid attempting a
16641 local hostname resolve for each descriptor we download. This
16642 will cut down on the number of "Success: chose address 'x.x.x.x'"
16643 log lines, and also avoid confusing clock jumps if the resolver
16644 is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
16646 o Minor bugfixes (client, fascistfirewall):
16647 - Avoid spurious warnings when ReachableAddresses or FascistFirewall
16648 is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
16650 o Minor bugfixes (hidden services):
16651 - Stop ignoring the anonymity status of saved keys for hidden
16652 services and single onion services when first starting tor.
16653 Instead, refuse to start tor if any hidden service key has been
16654 used in a different hidden service anonymity mode. Fixes bug
16655 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
16657 o Minor bugfixes (portability):
16658 - Work around a bug in the OSX 10.12 SDK that would prevent us from
16659 successfully targeting earlier versions of OSX. Resolves
16661 - Run correctly when built on Windows build environments that
16662 require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
16664 o Minor bugfixes (single onion services, Tor2web):
16665 - Stop complaining about long-term one-hop circuits deliberately
16666 created by single onion services and Tor2web. These log messages
16667 are intended to diagnose issue 8387, which relates to circuits
16668 hanging around forever for no reason. Fixes bug 20613; bugfix on
16669 0.2.9.1-alpha. Reported by "pastly".
16671 o Minor bugfixes (unit tests):
16672 - Stop spurious failures in the local interface address discovery
16673 unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
16677 - Correct the minimum bandwidth value in torrc.sample, and queue a
16678 corresponding change for torrc.minimal. Closes ticket 20085.
16681 Changes in version 0.2.9.5-alpha - 2016-11-08
16682 Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
16683 version. We believe one or two probably remain, and we encourage
16684 everyone to test this release.
16686 o Major bugfixes (client performance):
16687 - Clients now respond to new application stream requests immediately
16688 when they arrive, rather than waiting up to one second before
16689 starting to handle them. Fixes part of bug 19969; bugfix
16692 o Major bugfixes (client reliability):
16693 - When Tor leaves standby because of a new application request, open
16694 circuits as needed to serve that request. Previously, we would
16695 potentially wait a very long time. Fixes part of bug 19969; bugfix
16698 o Major bugfixes (download scheduling):
16699 - When using an exponential backoff schedule, do not give up on
16700 downloading just because we have failed a bunch of times. Since
16701 each delay is longer than the last, retrying indefinitely won't
16702 hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
16703 - If a consensus expires while we are waiting for certificates to
16704 download, stop waiting for certificates.
16705 - If we stop waiting for certificates less than a minute after we
16706 started downloading them, do not consider the certificate download
16707 failure a separate failure. Fixes bug 20533; bugfix
16709 - Remove the maximum delay on exponential-backoff scheduling. Since
16710 we now allow an infinite number of failures (see ticket 20536), we
16711 must now allow the time to grow longer on each failure. Fixes part
16712 of bug 20534; bugfix on 0.2.9.1-alpha.
16713 - Make our initial download delays closer to those from 0.2.8. Fixes
16714 another part of bug 20534; bugfix on 0.2.9.1-alpha.
16715 - When determining when to download a directory object, handle times
16716 after 2038 if the operating system supports them. (Someday this
16717 will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
16718 - When using exponential backoff in test networks, use a lower
16719 exponent, so the delays do not vary as much. This helps test
16720 networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
16722 o Minor features (geoip):
16723 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
16726 o Minor bugfixes (client directory scheduling):
16727 - Treat "relay too busy to answer request" as a failed request and a
16728 reason to back off on our retry frequency. This is safe now that
16729 exponential backoffs retry indefinitely, and avoids a bug where we
16730 would reset our download schedule erroneously. Fixes bug 20593;
16731 bugfix on 0.2.9.1-alpha.
16733 o Minor bugfixes (client, logging):
16734 - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
16735 assume all nodes support EXTEND2. Use ntor whenever a key is
16736 available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
16737 - On DNSPort, stop logging a BUG warning on a failed hostname
16738 lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
16740 o Minor bugfixes (hidden services):
16741 - When configuring hidden services, check every hidden service
16742 directory's permissions. Previously, we only checked the last
16743 hidden service. Fixes bug 20529; bugfix the work to fix 13942
16746 o Minor bugfixes (portability):
16747 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
16748 architectures. Closes ticket 20588.
16749 - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
16750 removed the ECDH ciphers which caused the tests to fail on
16751 platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
16752 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
16753 20551; bugfix on 0.2.1.1-alpha.
16755 o Minor bugfixes (relay bootstrap):
16756 - Ensure relays don't make multiple connections during bootstrap.
16757 Fixes bug 20591; bugfix on 0.2.8.1-alpha.
16759 o Minor bugfixes (relay):
16760 - Work around a memory leak in OpenSSL 1.1 when encoding public
16761 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
16762 - Avoid a small memory leak when informing worker threads about
16763 rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
16764 - Do not try to parallelize workers more than 16x without the user
16765 explicitly configuring us to do so, even if we do detect more than
16766 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
16768 o Minor bugfixes (single onion services):
16769 - Start correctly when creating a single onion service in a
16770 directory that did not previously exist. Fixes bug 20484; bugfix
16773 o Minor bugfixes (testing):
16774 - Avoid a unit test failure on systems with over 16 detectable CPU
16775 cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
16778 - Clarify that setting HiddenServiceNonAnonymousMode requires you to
16779 also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
16780 - Module-level documentation for several more modules. Closes
16781 tickets 19287 and 19290.
16784 Changes in version 0.2.8.9 - 2016-10-17
16785 Tor 0.2.8.9 backports a fix for a security hole in previous versions
16786 of Tor that would allow a remote attacker to crash a Tor client,
16787 hidden service, relay, or authority. All Tor users should upgrade to
16788 this version, or to 0.2.9.4-alpha. Patches will be released for older
16791 o Major features (security fixes, also in 0.2.9.4-alpha):
16792 - Prevent a class of security bugs caused by treating the contents
16793 of a buffer chunk as if they were a NUL-terminated string. At
16794 least one such bug seems to be present in all currently used
16795 versions of Tor, and would allow an attacker to remotely crash
16796 most Tor instances, especially those compiled with extra compiler
16797 hardening. With this defense in place, such bugs can't crash Tor,
16798 though we should still fix them as they occur. Closes ticket
16799 20384 (TROVE-2016-10-001).
16801 o Minor features (geoip):
16802 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
16806 Changes in version 0.2.9.4-alpha - 2016-10-17
16807 Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
16808 that would allow a remote attacker to crash a Tor client, hidden
16809 service, relay, or authority. All Tor users should upgrade to this
16810 version, or to 0.2.8.9. Patches will be released for older versions
16813 Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
16814 previous versions of Tor, including the implementation of a feature to
16815 future- proof the Tor ecosystem against protocol changes, some bug
16816 fixes necessary for Tor Browser to use unix domain sockets correctly,
16817 and several portability improvements. We anticipate that this will be
16818 the last alpha in the Tor 0.2.9 series, and that the next release will
16819 be a release candidate.
16821 o Major features (security fixes):
16822 - Prevent a class of security bugs caused by treating the contents
16823 of a buffer chunk as if they were a NUL-terminated string. At
16824 least one such bug seems to be present in all currently used
16825 versions of Tor, and would allow an attacker to remotely crash
16826 most Tor instances, especially those compiled with extra compiler
16827 hardening. With this defense in place, such bugs can't crash Tor,
16828 though we should still fix them as they occur. Closes ticket
16829 20384 (TROVE-2016-10-001).
16831 o Major features (subprotocol versions):
16832 - Tor directory authorities now vote on a set of recommended
16833 subprotocol versions, and on a set of required subprotocol
16834 versions. Clients and relays that lack support for a _required_
16835 subprotocol version will not start; those that lack support for a
16836 _recommended_ subprotocol version will warn the user to upgrade.
16837 Closes ticket 19958; implements part of proposal 264.
16838 - Tor now uses "subprotocol versions" to indicate compatibility.
16839 Previously, versions of Tor looked at the declared Tor version of
16840 a relay to tell whether they could use a given feature. Now, they
16841 should be able to rely on its declared subprotocol versions. This
16842 change allows compatible implementations of the Tor protocol(s) to
16843 exist without pretending to be 100% bug-compatible with particular
16844 releases of Tor itself. Closes ticket 19958; implements part of
16847 o Minor feature (fallback directories):
16848 - Remove broken fallbacks from the hard-coded fallback directory
16849 list. Closes ticket 20190; patch by teor.
16851 o Minor features (client, directory):
16852 - Since authorities now omit all routers that lack the Running and
16853 Valid flags, we assume that any relay listed in the consensus must
16854 have those flags. Closes ticket 20001; implements part of
16857 o Minor features (compilation, portability):
16858 - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
16861 o Minor features (development tools, etags):
16862 - Teach the "make tags" Makefile target how to correctly find
16863 "MOCK_IMPL" function definitions. Patch from nherring; closes
16866 o Minor features (geoip):
16867 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
16870 o Minor features (unix domain sockets):
16871 - When configuring a unix domain socket for a SocksPort,
16872 ControlPort, or Hidden service, you can now wrap the address in
16873 quotes, using C-style escapes inside the quotes. This allows unix
16874 domain socket paths to contain spaces.
16876 o Minor features (virtual addresses):
16877 - Increase the maximum number of bits for the IPv6 virtual network
16878 prefix from 16 to 104. In this way, the condition for address
16879 allocation is less restrictive. Closes ticket 20151; feature
16882 o Minor bugfixes (address discovery):
16883 - Stop reordering IP addresses returned by the OS. This makes it
16884 more likely that Tor will guess the same relay IP address every
16885 time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
16886 Reported by René Mayrhofer, patch by "cypherpunks".
16888 o Minor bugfixes (client, unix domain sockets):
16889 - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
16890 the client address is meaningless. Fixes bug 20261; bugfix
16893 o Minor bugfixes (compilation, OpenBSD):
16894 - Detect Libevent2 functions correctly on systems that provide
16895 libevent2, but where libevent1 is linked with -levent. Fixes bug
16896 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
16898 o Minor bugfixes (configuration):
16899 - When parsing quoted configuration values from the torrc file,
16900 handle windows line endings correctly. Fixes bug 19167; bugfix on
16901 0.2.0.16-alpha. Patch from "Pingl".
16903 o Minor bugfixes (getpass):
16904 - Defensively fix a non-triggerable heap corruption at do_getpass()
16905 to protect ourselves from mistakes in the future. Fixes bug
16906 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
16909 o Minor bugfixes (hidden service):
16910 - Allow hidden services to run on IPv6 addresses even when the
16911 IPv6Exit option is not set. Fixes bug 18357; bugfix
16915 - Add module-level internal documentation for 36 C files that
16916 previously didn't have a high-level overview. Closes ticket #20385.
16918 o Required libraries:
16919 - When building with OpenSSL, Tor now requires version 1.0.1 or
16920 later. OpenSSL 1.0.0 and earlier are no longer supported by the
16921 OpenSSL team, and should not be used. Closes ticket 20303.
16924 Changes in version 0.2.9.3-alpha - 2016-09-23
16925 Tor 0.2.9.3-alpha adds improved support for entities that want to make
16926 high-performance services available through the Tor .onion mechanism
16927 without themselves receiving anonymity as they host those services. It
16928 also tries harder to ensure that all steps on a circuit are using the
16929 strongest crypto possible, strengthens some TLS properties, and
16930 resolves several bugs -- including a pair of crash bugs from the 0.2.8
16931 series. Anybody running an earlier version of 0.2.9.x should upgrade.
16933 o Major bugfixes (crash, also in 0.2.8.8):
16934 - Fix a complicated crash bug that could affect Tor clients
16935 configured to use bridges when replacing a networkstatus consensus
16936 in which one of their bridges was mentioned. OpenBSD users saw
16937 more crashes here, but all platforms were potentially affected.
16938 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
16940 o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
16941 - Fix a timing-dependent assertion failure that could occur when we
16942 tried to flush from a circuit after having freed its cells because
16943 of an out-of-memory condition. Fixes bug 20203; bugfix on
16944 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
16947 o Major features (circuit building, security):
16948 - Authorities, relays and clients now require ntor keys in all
16949 descriptors, for all hops (except for rare hidden service protocol
16950 cases), for all circuits, and for all other roles. Part of
16952 - Tor authorities, relays, and clients only use ntor, except for
16953 rare cases in the hidden service protocol. Part of ticket 19163.
16955 o Major features (single-hop "hidden" services):
16956 - Add experimental HiddenServiceSingleHopMode and
16957 HiddenServiceNonAnonymousMode options. When both are set to 1,
16958 every hidden service on a Tor instance becomes a non-anonymous
16959 Single Onion Service. Single Onions make one-hop (direct)
16960 connections to their introduction and rendezvous points. One-hop
16961 circuits make Single Onion servers easily locatable, but clients
16962 remain location-anonymous. This is compatible with the existing
16963 hidden service implementation, and works on the current tor
16964 network without any changes to older relays or clients. Implements
16965 proposal 260, completes ticket 17178. Patch by teor and asn.
16967 o Major features (resource management):
16968 - Tor can now notice it is about to run out of sockets, and
16969 preemptively close connections of lower priority. (This feature is
16970 off by default for now, since the current prioritizing method is
16971 yet not mature enough. You can enable it by setting
16972 "DisableOOSCheck 0", but watch out: it might close some sockets
16973 you would rather have it keep.) Closes ticket 18640.
16975 o Major bugfixes (circuit building):
16976 - Hidden service client-to-intro-point and service-to-rendezvous-
16977 point circuits use the TAP key supplied by the protocol, to avoid
16978 epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
16980 o Major bugfixes (compilation, OpenBSD):
16981 - Fix a Libevent-detection bug in our autoconf script that would
16982 prevent Tor from linking successfully on OpenBSD. Patch from
16983 rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
16985 o Major bugfixes (hidden services):
16986 - Clients now require hidden services to include the TAP keys for
16987 their intro points in the hidden service descriptor. This prevents
16988 an inadvertent upgrade to ntor, which a malicious hidden service
16989 could use to distinguish clients by consensus version. Fixes bug
16990 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
16992 o Minor features (security, TLS):
16993 - Servers no longer support clients that without AES ciphersuites.
16994 (3DES is no longer considered an acceptable cipher.) We believe
16995 that no such Tor clients currently exist, since Tor has required
16996 OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
16998 o Minor feature (fallback directories):
16999 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
17000 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
17001 2016. Closes ticket 20190; patch by teor.
17003 o Minor features (geoip, also in 0.2.8.8):
17004 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
17007 o Minor feature (port flags):
17008 - Add new flags to the *Port options to finer control over which
17009 requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
17010 and the synthetic flag OnionTrafficOnly, which is equivalent to
17011 NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
17012 18693; patch by "teor".
17014 o Minor features (directory authority):
17015 - After voting, if the authorities decide that a relay is not
17016 "Valid", they no longer include it in the consensus at all. Closes
17017 ticket 20002; implements part of proposal 272.
17019 o Minor features (testing):
17020 - Disable memory protections on OpenBSD when performing our unit
17021 tests for memwipe(). The test deliberately invokes undefined
17022 behavior, and the OpenBSD protections interfere with this. Patch
17023 from "rubiate". Closes ticket 20066.
17025 o Minor features (testing, ipv6):
17026 - Add the single-onion and single-onion-ipv6 chutney targets to
17027 "make test-network-all". This requires a recent chutney version
17028 with the single onion network flavours (git c72a652 or later).
17029 Closes ticket 20072; patch by teor.
17030 - Add the hs-ipv6 chutney target to make test-network-all's IPv6
17031 tests. Remove bridges+hs, as it's somewhat redundant. This
17032 requires a recent chutney version that supports IPv6 clients,
17033 relays, and authorities. Closes ticket 20069; patch by teor.
17035 o Minor features (Tor2web):
17036 - Make Tor2web clients respect ReachableAddresses. This feature was
17037 inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
17038 0.2.8.7. Implements feature 20034. Patch by teor.
17040 o Minor features (unit tests):
17041 - We've done significant work to make the unit tests run faster.
17042 - Our link-handshake unit tests now check that when invalid
17043 handshakes fail, they fail with the error messages we expected.
17044 - Our unit testing code that captures log messages no longer
17045 prevents them from being written out if the user asked for them
17046 (by passing --debug or --info or or --notice --warn to the "test"
17047 binary). This change prevents us from missing unexpected log
17048 messages simply because we were looking for others. Related to
17050 - The unit tests now log all warning messages with the "BUG" flag.
17051 Previously, they only logged errors by default. This change will
17052 help us make our testing code more correct, and make sure that we
17053 only hit this code when we mean to. In the meantime, however,
17054 there will be more warnings in the unit test logs than before.
17055 This is preparatory work for ticket 19999.
17056 - The unit tests now treat any failure of a "tor_assert_nonfatal()"
17057 assertion as a test failure.
17059 o Minor bug fixes (circuits):
17060 - Use the CircuitBuildTimeout option whenever
17061 LearnCircuitBuildTimeout is disabled. Previously, we would respect
17062 the option when a user disabled it, but not when it was disabled
17063 because some other option was set. Fixes bug 20073; bugfix on
17064 0.2.4.12-alpha. Patch by teor.
17066 o Minor bugfixes (allocation):
17067 - Change how we allocate memory for large chunks on buffers, to
17068 avoid a (currently impossible) integer overflow, and to waste less
17069 space when allocating unusually large chunks. Fixes bug 20081;
17070 bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
17071 - Always include orconfig.h before including any other C headers.
17072 Sometimes, it includes macros that affect the behavior of the
17073 standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
17074 first version to use AC_USE_SYSTEM_EXTENSIONS).
17075 - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
17076 compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
17077 Patch from Gisle Vanem.
17078 - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
17079 They apparently require a set of annotations that we aren't
17080 currently using, and they create false positives in our pthreads
17081 wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
17083 o Minor bugfixes (directory authority):
17084 - Die with a more useful error when the operator forgets to place
17085 the authority_signing_key file into the keys directory. This
17086 avoids an uninformative assert & traceback about having an invalid
17087 key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
17088 - When allowing private addresses, mark Exits that only exit to
17089 private locations as such. Fixes bug 20064; bugfix
17092 o Minor bugfixes (documentation):
17093 - Document the default PathsNeededToBuildCircuits value that's used
17094 by clients when the directory authorities don't set
17095 min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
17096 in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
17097 - Fix manual for the User option: it takes a username, not a UID.
17098 Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
17101 o Minor bugfixes (hidden services):
17102 - Stop logging intro point details to the client log on certain
17103 error conditions. Fixed as part of bug 20012; bugfix on
17104 0.2.4.8-alpha. Patch by teor.
17106 o Minor bugfixes (IPv6, testing):
17107 - Check for IPv6 correctly on Linux when running test networks.
17108 Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
17110 o Minor bugfixes (Linux seccomp2 sandbox):
17111 - Add permission to run the sched_yield() and sigaltstack() system
17112 calls, in order to support versions of Tor compiled with asan or
17113 ubsan code that use these calls. Now "sandbox 1" and
17114 "--enable-expensive-hardening" should be compatible on more
17115 systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
17117 o Minor bugfixes (logging):
17118 - When logging a message from the BUG() macro, be explicit about
17119 what we were asserting. Previously we were confusing what we were
17120 asserting with what the bug was. Fixes bug 20093; bugfix
17122 - When we are unable to remove the bw_accounting file, do not warn
17123 if the reason we couldn't remove it was that it didn't exist.
17124 Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
17126 o Minor bugfixes (option parsing):
17127 - Count unix sockets when counting client listeners (SOCKS, Trans,
17128 NATD, and DNS). This has no user-visible behaviour changes: these
17129 options are set once, and never read. Required for correct
17130 behaviour in ticket 17178. Fixes bug 19677; bugfix on
17131 0.2.6.3-alpha. Patch by teor.
17133 o Minor bugfixes (options):
17134 - Check the consistency of UseEntryGuards and EntryNodes more
17135 reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
17137 - Stop changing the configured value of UseEntryGuards on
17138 authorities and Tor2web clients. Fixes bug 20074; bugfix on
17139 commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
17142 o Minor bugfixes (Tor2web):
17143 - Prevent Tor2web clients running hidden services, these services
17144 are not anonymous due to the one-hop client paths. Fixes bug
17145 19678. Patch by teor.
17147 o Minor bugfixes (unit tests):
17148 - Fix a shared-random unit test that was failing on big endian
17149 architectures due to internal representation of a integer copied
17150 to a buffer. The test is changed to take a full 32 bytes of data
17151 and use the output of a python script that make the COMMIT and
17152 REVEAL calculation according to the spec. Fixes bug 19977; bugfix
17154 - The tor_tls_server_info_callback unit test no longer crashes when
17155 debug-level logging is turned on. Fixes bug 20041; bugfix
17159 Changes in version 0.2.8.8 - 2016-09-23
17160 Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
17161 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
17162 who select public relays as their bridges.
17164 o Major bugfixes (crash):
17165 - Fix a complicated crash bug that could affect Tor clients
17166 configured to use bridges when replacing a networkstatus consensus
17167 in which one of their bridges was mentioned. OpenBSD users saw
17168 more crashes here, but all platforms were potentially affected.
17169 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
17171 o Major bugfixes (relay, OOM handler):
17172 - Fix a timing-dependent assertion failure that could occur when we
17173 tried to flush from a circuit after having freed its cells because
17174 of an out-of-memory condition. Fixes bug 20203; bugfix on
17175 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
17178 o Minor feature (fallback directories):
17179 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
17180 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
17181 2016. Closes ticket 20190; patch by teor.
17183 o Minor features (geoip):
17184 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
17188 Changes in version 0.2.9.2-alpha - 2016-08-24
17189 Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
17190 several new features and bugfixes. It also includes an important
17191 authority update and an important bugfix from 0.2.8.7. Everyone who
17192 sets the ReachableAddresses option, and all bridges, are strongly
17193 encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
17195 o Directory authority changes (also in 0.2.8.7):
17196 - The "Tonga" bridge authority has been retired; the new bridge
17197 authority is "Bifroest". Closes tickets 19728 and 19690.
17199 o Major bugfixes (client, security, also in 0.2.8.7):
17200 - Only use the ReachableAddresses option to restrict the first hop
17201 in a path. In earlier versions of 0.2.8.x, it would apply to
17202 every hop in the path, with a possible degradation in anonymity
17203 for anyone using an uncommon ReachableAddress setting. Fixes bug
17204 19973; bugfix on 0.2.8.2-alpha.
17206 o Major features (user interface):
17207 - Tor now supports the ability to declare options deprecated, so
17208 that we can recommend that people stop using them. Previously,
17209 this was done in an ad-hoc way. Closes ticket 19820.
17211 o Major bugfixes (directory downloads):
17212 - Avoid resetting download status for consensuses hourly, since we
17213 already have another, smarter retry mechanism. Fixes bug 8625;
17214 bugfix on 0.2.0.9-alpha.
17216 o Minor features (config):
17217 - Warn users when descriptor and port addresses are inconsistent.
17218 Mitigates bug 13953; patch by teor.
17220 o Minor features (geoip):
17221 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
17224 o Minor features (user interface):
17225 - There is a new --list-deprecated-options command-line option to
17226 list all of the deprecated options. Implemented as part of
17229 o Minor bugfixes (code style):
17230 - Fix an integer signedness conversion issue in the case conversion
17231 tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
17233 o Minor bugfixes (compilation):
17234 - Build correctly on versions of libevent2 without support for
17235 evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
17237 - Fix a compilation warning on GCC versions before 4.6. Our
17238 ENABLE_GCC_WARNING macro used the word "warning" as an argument,
17239 when it is also required as an argument to the compiler pragma.
17240 Fixes bug 19901; bugfix on 0.2.9.1-alpha.
17242 o Minor bugfixes (compilation, also in 0.2.8.7):
17243 - Remove an inappropriate "inline" in tortls.c that was causing
17244 warnings on older versions of GCC. Fixes bug 19903; bugfix
17247 o Minor bugfixes (fallback directories, also in 0.2.8.7):
17248 - Avoid logging a NULL string pointer when loading fallback
17249 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
17250 and 0.2.8.1-alpha. Report and patch by "rubiate".
17252 o Minor bugfixes (logging):
17253 - Log a more accurate message when we fail to dump a microdescriptor.
17254 Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
17256 o Minor bugfixes (memory leak):
17257 - Fix a series of slow memory leaks related to parsing torrc files
17258 and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
17260 o Deprecated features:
17261 - A number of DNS-cache-related sub-options for client ports are now
17262 deprecated for security reasons, and may be removed in a future
17263 version of Tor. (We believe that client-side DNS caching is a bad
17264 idea for anonymity, and you should not turn it on.) The options
17265 are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
17266 UseIPv4Cache, and UseIPv6Cache.
17267 - A number of options are deprecated for security reasons, and may
17268 be removed in a future version of Tor. The options are:
17269 AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
17270 AllowSingleHopExits, ClientDNSRejectInternalAddresses,
17271 CloseHSClientCircuitsImmediatelyOnTimeout,
17272 CloseHSServiceRendCircuitsImmediatelyOnTimeout,
17273 ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
17274 UseNTorHandshake, and WarnUnsafeSocks.
17275 - The *ListenAddress options are now deprecated as unnecessary: the
17276 corresponding *Port options should be used instead. These options
17277 may someday be removed. The affected options are:
17278 ControlListenAddress, DNSListenAddress, DirListenAddress,
17279 NATDListenAddress, ORListenAddress, SocksListenAddress,
17280 and TransListenAddress.
17283 - Correct the IPv6 syntax in our documentation for the
17284 VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
17287 - We no longer include the (dead, deprecated) bufferevent code in
17288 Tor. Closes ticket 19450. Based on a patch from U+039b.
17291 Changes in version 0.2.8.7 - 2016-08-24
17292 Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
17293 option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
17294 who sets the ReachableAddresses option, and all bridges, are strongly
17295 encouraged to upgrade.
17297 o Directory authority changes:
17298 - The "Tonga" bridge authority has been retired; the new bridge
17299 authority is "Bifroest". Closes tickets 19728 and 19690.
17301 o Major bugfixes (client, security):
17302 - Only use the ReachableAddresses option to restrict the first hop
17303 in a path. In earlier versions of 0.2.8.x, it would apply to
17304 every hop in the path, with a possible degradation in anonymity
17305 for anyone using an uncommon ReachableAddress setting. Fixes bug
17306 19973; bugfix on 0.2.8.2-alpha.
17308 o Minor features (geoip):
17309 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
17312 o Minor bugfixes (compilation):
17313 - Remove an inappropriate "inline" in tortls.c that was causing
17314 warnings on older versions of GCC. Fixes bug 19903; bugfix
17317 o Minor bugfixes (fallback directories):
17318 - Avoid logging a NULL string pointer when loading fallback
17319 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
17320 and 0.2.8.1-alpha. Report and patch by "rubiate".
17323 Changes in version 0.2.9.1-alpha - 2016-08-08
17324 Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
17325 series. It improves our support for hardened builds and compiler
17326 warnings, deploys some critical infrastructure for improvements to
17327 hidden services, includes a new timing backend that we hope to use for
17328 better support for traffic padding, makes it easier for programmers to
17329 log unexpected events, and contains other small improvements to
17330 security, correctness, and performance.
17332 Below are the changes since 0.2.8.6.
17334 o New system requirements:
17335 - Tor now requires Libevent version 2.0.10-stable or later. Older
17336 versions of Libevent have less efficient backends for several
17337 platforms, and lack the DNS code that we use for our server-side
17338 DNS support. This implements ticket 19554.
17339 - Tor now requires zlib version 1.2 or later, for security,
17340 efficiency, and (eventually) gzip support. (Back when we started,
17341 zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
17342 released in 2003. We recommend the latest version.)
17344 o Major features (build, hardening):
17345 - Tor now builds with -ftrapv by default on compilers that support
17346 it. This option detects signed integer overflow (which C forbids),
17347 and turns it into a hard-failure. We do not apply this option to
17348 code that needs to run in constant time to avoid side-channels;
17349 instead, we use -fwrapv in that code. Closes ticket 17983.
17350 - When --enable-expensive-hardening is selected, stop applying the
17351 clang/gcc sanitizers to code that needs to run in constant time.
17352 Although we are aware of no introduced side-channels, we are not
17353 able to prove that there are none. Related to ticket 17983.
17355 o Major features (compilation):
17356 - Our big list of extra GCC warnings is now enabled by default when
17357 building with GCC (or with anything like Clang that claims to be
17358 GCC-compatible). To make all warnings into fatal compilation
17359 errors, pass --enable-fatal-warnings to configure. Closes
17361 - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
17362 turn on C and POSIX extensions. (Previously, we attempted to do
17363 this on an ad hoc basis.) Closes ticket 19139.
17365 o Major features (directory authorities, hidden services):
17366 - Directory authorities can now perform the shared randomness
17367 protocol specified by proposal 250. Using this protocol, directory
17368 authorities generate a global fresh random value every day. In the
17369 future, this value will be used by hidden services to select
17370 HSDirs. This release implements the directory authority feature;
17371 the hidden service side will be implemented in the future as part
17372 of proposal 224. Resolves ticket 16943; implements proposal 250.
17374 o Major features (downloading, random exponential backoff):
17375 - When we fail to download an object from a directory service, wait
17376 for an (exponentially increasing) randomized amount of time before
17377 retrying, rather than a fixed interval as we did before. This
17378 prevents a group of Tor instances from becoming too synchronized,
17379 or a single Tor instance from becoming too predictable, in its
17380 download schedule. Closes ticket 15942.
17382 o Major bugfixes (exit policies):
17383 - Avoid disclosing exit outbound bind addresses, configured port
17384 bind addresses, and local interface addresses in relay descriptors
17385 by default under ExitPolicyRejectPrivate. Instead, only reject
17386 these (otherwise unlisted) addresses if
17387 ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
17388 0.2.7.2-alpha. Patch by teor.
17390 o Major bugfixes (hidden service client):
17391 - Allow Tor clients with appropriate controllers to work with
17392 FetchHidServDescriptors set to 0. Previously, this option also
17393 disabled descriptor cache lookup, thus breaking hidden services
17394 entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
17396 o Minor features (build, hardening):
17397 - Detect and work around a libclang_rt problem that would prevent
17398 clang from finding __mulodi4() on some 32-bit platforms, and thus
17399 keep -ftrapv from linking on those systems. Closes ticket 19079.
17400 - When building on a system without runtime support for the runtime
17401 hardening options, try to log a useful warning at configuration
17402 time, rather than an incomprehensible warning at link time. If
17403 expensive hardening was requested, this warning becomes an error.
17404 Closes ticket 18895.
17406 o Minor features (code safety):
17407 - In our integer-parsing functions, ensure that maxiumum value we
17408 give is no smaller than the minimum value. Closes ticket 19063;
17411 o Minor features (controller):
17412 - Implement new GETINFO queries for all downloads that use
17413 download_status_t to schedule retries. This allows controllers to
17414 examine the schedule for pending downloads. Closes ticket 19323.
17415 - Allow controllers to configure basic client authorization on
17416 hidden services when they create them with the ADD_ONION control
17417 command. Implements ticket 15588. Patch by "special".
17418 - Fire a STATUS_SERVER controller event whenever the hibernation
17419 status changes between "awake"/"soft"/"hard". Closes ticket 18685.
17421 o Minor features (directory authority):
17422 - Directory authorities now only give the Guard flag to a relay if
17423 they are also giving it the Stable flag. This change allows us to
17424 simplify path selection for clients. It should have minimal effect
17425 in practice, since >99% of Guards already have the Stable flag.
17426 Implements ticket 18624.
17427 - Directory authorities now write their v3-status-votes file out to
17428 disk earlier in the consensus process, so we have a record of the
17429 votes even if we abort the consensus process. Resolves
17432 o Minor features (hidden service):
17433 - Stop being so strict about the payload length of "rendezvous1"
17434 cells. We used to be locked in to the "TAP" handshake length, and
17435 now we can handle better handshakes like "ntor". Resolves
17438 o Minor features (infrastructure, time):
17439 - Tor now uses the operating system's monotonic timers (where
17440 available) for internal fine-grained timing. Previously we would
17441 look at the system clock, and then attempt to compensate for the
17442 clock running backwards. Closes ticket 18908.
17443 - Tor now includes an improved timer backend, so that we can
17444 efficiently support tens or hundreds of thousands of concurrent
17445 timers, as will be needed for some of our planned anti-traffic-
17446 analysis work. This code is based on William Ahern's "timeout.c"
17447 project, which implements a "tickless hierarchical timing wheel".
17448 Closes ticket 18365.
17450 o Minor features (logging):
17451 - Provide a more useful warning message when configured with an
17452 invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
17453 - When dumping unparseable router descriptors, optionally store them
17454 in separate files, named by digest, up to a configurable size
17455 limit. You can change the size limit by setting the
17456 MaxUnparseableDescSizeToLog option, and disable this feature by
17457 setting that option to 0. Closes ticket 18322.
17458 - Add a set of macros to check nonfatal assertions, for internal
17459 use. Migrating more of our checks to these should help us avoid
17460 needless crash bugs. Closes ticket 18613.
17462 o Minor features (performance):
17463 - Change the "optimistic data" extension from "off by default" to
17464 "on by default". The default was ordinarily overridden by a
17465 consensus option, but when clients were bootstrapping for the
17466 first time, they would not have a consensus to get the option
17467 from. Changing this default saves a round-trip during startup.
17468 Closes ticket 18815.
17470 o Minor features (relay, usability):
17471 - When the directory authorities refuse a bad relay's descriptor,
17472 encourage the relay operator to contact us. Many relay operators
17473 won't notice this line in their logs, but it's a win if even a few
17474 learn why we don't like what their relay was doing. Resolves
17477 o Minor features (testing):
17478 - Let backtrace tests work correctly under AddressSanitizer. Fixes
17479 part of bug 18934; bugfix on 0.2.5.2-alpha.
17480 - Move the test-network.sh script to chutney, and modify tor's test-
17481 network.sh to call the (newer) chutney version when available.
17482 Resolves ticket 19116. Patch by teor.
17483 - Use the lcov convention for marking lines as unreachable, so that
17484 we don't count them when we're generating test coverage data.
17485 Update our coverage tools to understand this convention. Closes
17488 o Minor bugfixes (bootstrap):
17489 - Remember the directory we fetched the consensus or previous
17490 certificates from, and use it to fetch future authority
17491 certificates. This change improves bootstrapping performance.
17492 Fixes bug 18963; bugfix on 0.2.8.1-alpha.
17494 o Minor bugfixes (build):
17495 - The test-stem and test-network makefile targets now depend only on
17496 the tor binary that they are testing. Previously, they depended on
17497 "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
17498 patch from "cypherpunks".
17500 o Minor bugfixes (circuits):
17501 - Make sure extend_info_from_router() is only called on servers.
17502 Fixes bug 19639; bugfix on 0.2.8.1-alpha.
17504 o Minor bugfixes (compilation):
17505 - When building with Clang, use a full set of GCC warnings.
17506 (Previously, we included only a subset, because of the way we
17507 detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
17509 o Minor bugfixes (directory authority):
17510 - Authorities now sort the "package" lines in their votes, for ease
17511 of debugging. (They are already sorted in consensus documents.)
17512 Fixes bug 18840; bugfix on 0.2.6.3-alpha.
17513 - When parsing a detached signature, make sure we use the length of
17514 the digest algorithm instead of an hardcoded DIGEST256_LEN in
17515 order to avoid comparing bytes out-of-bounds with a smaller digest
17516 length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
17518 o Minor bugfixes (documentation):
17519 - Document the --passphrase-fd option in the tor manpage. Fixes bug
17520 19504; bugfix on 0.2.7.3-rc.
17521 - Fix the description of the --passphrase-fd option in the
17522 tor-gencert manpage. The option is used to pass the number of a
17523 file descriptor to read the passphrase from, not to read the file
17524 descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
17526 o Minor bugfixes (ephemeral hidden service):
17527 - When deleting an ephemeral hidden service, close its intro points
17528 even if they are not completely open. Fixes bug 18604; bugfix
17531 o Minor bugfixes (guard selection):
17532 - Use a single entry guard even if the NumEntryGuards consensus
17533 parameter is not provided. Fixes bug 17688; bugfix
17535 - Don't mark guards as unreachable if connection_connect() fails.
17536 That function fails for local reasons, so it shouldn't reveal
17537 anything about the status of the guard. Fixes bug 14334; bugfix
17540 o Minor bugfixes (hidden service client):
17541 - Increase the minimum number of internal circuits we preemptively
17542 build from 2 to 3, so a circuit is available when a client
17543 connects to another onion service. Fixes bug 13239; bugfix
17546 o Minor bugfixes (logging):
17547 - When logging a directory ownership mismatch, log the owning
17548 username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
17550 o Minor bugfixes (memory leaks):
17551 - Fix a small, uncommon memory leak that could occur when reading a
17552 truncated ed25519 key file. Fixes bug 18956; bugfix
17555 o Minor bugfixes (testing):
17556 - Allow clients to retry HSDirs much faster in test networks. Fixes
17557 bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
17558 - Disable ASAN's detection of segmentation faults while running
17559 test_bt.sh, so that we can make sure that our own backtrace
17560 generation code works. Fixes another aspect of bug 18934; bugfix
17561 on 0.2.5.2-alpha. Patch from "cypherpunks".
17562 - Fix the test-network-all target on out-of-tree builds by using the
17563 correct path to the test driver script. Fixes bug 19421; bugfix
17566 o Minor bugfixes (time):
17567 - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
17568 bugfix on all released tor versions.
17569 - When computing the difference between two times in milliseconds,
17570 we now round to the nearest millisecond correctly. Previously, we
17571 could sometimes round in the wrong direction. Fixes bug 19428;
17572 bugfix on 0.2.2.2-alpha.
17574 o Minor bugfixes (user interface):
17575 - Display a more accurate number of suppressed messages in the log
17576 rate-limiter. Previously, there was a potential integer overflow
17577 in the counter. Now, if the number of messages hits a maximum, the
17578 rate-limiter doesn't count any further. Fixes bug 19435; bugfix
17580 - Fix a typo in the passphrase prompt for the ed25519 identity key.
17581 Fixes bug 19503; bugfix on 0.2.7.2-alpha.
17583 o Code simplification and refactoring:
17584 - Remove redundant declarations of the MIN macro. Closes
17586 - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
17587 Closes ticket 18462; patch from "icanhasaccount".
17588 - Split the 600-line directory_handle_command_get function into
17589 separate functions for different URL types. Closes ticket 16698.
17592 - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
17593 ticket 19153. Patch from "U+039b".
17595 o Removed features:
17596 - Remove support for "GET /tor/bytes.txt" DirPort request, and
17597 "GETINFO dir-usage" controller request, which were only available
17598 via a compile-time option in Tor anyway. Feature was added in
17599 0.2.2.1-alpha. Resolves ticket 19035.
17600 - There is no longer a compile-time option to disable support for
17601 TransPort. (If you don't want TransPort; just don't use it.) Patch
17602 from "U+039b". Closes ticket 19449.
17605 - Run more workqueue tests as part of "make check". These had
17606 previously been implemented, but you needed to know special
17607 command-line options to enable them.
17608 - We now have unit tests for our code to reject zlib "compression
17609 bombs". (Fortunately, the code works fine.)
17612 Changes in version 0.2.8.6 - 2016-08-02
17614 Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
17616 The Tor 0.2.8 series improves client bootstrapping performance,
17617 completes the authority-side implementation of improved identity
17618 keys for relays, and includes numerous bugfixes and performance
17619 improvements throughout the program. This release continues to
17620 improve the coverage of Tor's test suite. For a full list of
17621 changes since Tor 0.2.7, see the ReleaseNotes file.
17623 Changes since 0.2.8.5-rc:
17625 o Minor features (geoip):
17626 - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
17629 o Minor bugfixes (compilation):
17630 - Fix a compilation warning in the unit tests on systems where char
17631 is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
17633 o Minor bugfixes (fallback directories):
17634 - Remove 1 fallback that was on the hardcoded list, then opted-out,
17635 leaving 89 of the 100 fallbacks originally introduced in Tor
17636 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
17638 o Minor bugfixes (Linux seccomp2 sandbox):
17639 - Allow more syscalls when running with "Sandbox 1" enabled:
17640 sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
17641 some systems, these are required for Tor to start. Fixes bug
17642 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
17643 - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
17644 so that get_interface_address6_via_udp_socket_hack() can work.
17645 Fixes bug 19660; bugfix on 0.2.5.1-alpha.
17648 Changes in version 0.2.8.5-rc - 2016-07-07
17649 Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
17650 series. If we find no new bugs or regressions here, the first stable
17651 0.2.8 release will be identical to it. It has a few small bugfixes
17652 against previous versions.
17654 o Directory authority changes:
17655 - Urras is no longer a directory authority. Closes ticket 19271.
17657 o Major bugfixes (heartbeat):
17658 - Fix a regression that would crash Tor when the periodic
17659 "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
17660 0.2.8.1-alpha. Reported by "kubaku".
17662 o Minor features (build):
17663 - Tor now again builds with the recent OpenSSL 1.1 development
17664 branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
17665 - When building manual pages, set the timezone to "UTC", so that the
17666 output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
17667 Patch from intrigeri.
17669 o Minor bugfixes (fallback directory selection):
17670 - Avoid errors during fallback selection if there are no eligible
17671 fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
17674 o Minor bugfixes (IPv6, microdescriptors):
17675 - Don't check node addresses when we only have a routerstatus. This
17676 allows IPv6-only clients to bootstrap by fetching microdescriptors
17677 from fallback directory mirrors. (The microdescriptor consensus
17678 has no IPv6 addresses in it.) Fixes bug 19608; bugfix
17681 o Minor bugfixes (logging):
17682 - Reduce pointlessly verbose log messages when directory servers
17683 can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
17684 0.2.8.1-alpha. Patch by teor.
17685 - When a fallback directory changes its fingerprint from the hard-
17686 coded fingerprint, log a less severe, more explanatory log
17687 message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
17689 o Minor bugfixes (Linux seccomp2 sandboxing):
17690 - Allow statistics to be written to disk when "Sandbox 1" is
17691 enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
17692 0.2.6.1-alpha respectively.
17694 o Minor bugfixes (user interface):
17695 - Remove a warning message "Service [scrubbed] not found after
17696 descriptor upload". This message appears when one uses HSPOST
17697 control command to upload a service descriptor. Since there is
17698 only a descriptor and no service, showing this message is
17699 pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
17701 o Fallback directory list:
17702 - Add a comment to the generated fallback directory list that
17703 explains how to comment out unsuitable fallbacks in a way that's
17704 compatible with the stem fallback parser.
17705 - Update fallback whitelist and blacklist based on relay operator
17706 emails. Blacklist unsuitable (non-working, over-volatile)
17707 fallbacks. Resolves ticket 19071. Patch by teor.
17708 - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
17709 originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
17710 ticket 19071; patch by teor.
17713 Changes in version 0.2.8.4-rc - 2016-06-15
17714 Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
17715 If we find no new bugs or regressions here, the first stable 0.2.8
17716 release will be identical to it. It has a few small bugfixes against
17719 o Major bugfixes (user interface):
17720 - Correctly give a warning in the cases where a relay is specified
17721 by nickname, and one such relay is found, but it is not officially
17722 Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
17724 o Minor features (build):
17725 - Tor now builds once again with the recent OpenSSL 1.1 development
17726 branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
17728 o Minor features (geoip):
17729 - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
17732 o Minor bugfixes (compilation):
17733 - Cause the unit tests to compile correctly on mingw64 versions that
17734 lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
17736 o Minor bugfixes (downloading):
17737 - Predict more correctly whether we'll be downloading over HTTP when
17738 we determine the maximum length of a URL. This should avoid a
17739 "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
17743 Changes in version 0.2.8.3-alpha - 2016-05-26
17744 Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
17745 the course of the 0.2.8 development cycle. It improves the behavior of
17746 directory clients, fixes several crash bugs, fixes a gap in compiler
17747 hardening, and allows the full integration test suite to run on
17750 o Major bugfixes (security, client, DNS proxy):
17751 - Stop a crash that could occur when a client running with DNSPort
17752 received a query with multiple address types, and the first
17753 address type was not supported. Found and fixed by Scott Dial.
17754 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
17756 o Major bugfixes (security, compilation):
17757 - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
17758 is predefined. Previously, our use of -D_FORTIFY_SOURCE would
17759 cause a compiler warning, thereby making other checks fail, and
17760 needlessly disabling compiler-hardening support. Fixes one case of
17761 bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
17763 o Major bugfixes (security, directory authorities):
17764 - Fix a crash and out-of-bounds write during authority voting, when
17765 the list of relays includes duplicate ed25519 identity keys. Fixes
17766 bug 19032; bugfix on 0.2.8.2-alpha.
17768 o Major bugfixes (client, bootstrapping):
17769 - Check if bootstrap consensus downloads are still needed when the
17770 linked connection attaches. This prevents tor making unnecessary
17771 begindir-style connections, which are the only directory
17772 connections tor clients make since the fix for 18483 was merged.
17773 - Fix some edge cases where consensus download connections may not
17774 have been closed, even though they were not needed. Related to fix
17776 - Make relays retry consensus downloads the correct number of times,
17777 rather than the more aggressive client retry count. Fixes part of
17779 - Stop downloading consensuses when we have a consensus, even if we
17780 don't have all the certificates for it yet. Fixes bug 18809;
17781 bugfix on 0.2.8.1-alpha. Patches by arma and teor.
17783 o Major bugfixes (directory mirrors):
17784 - Decide whether to advertise begindir support in the the same way
17785 we decide whether to advertise our DirPort. Allowing these
17786 decisions to become out-of-sync led to surprising behavior like
17787 advertising begindir support when hibernation made us not
17788 advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
17791 o Major bugfixes (IPv6 bridges, client):
17792 - Actually use IPv6 addresses when selecting directory addresses for
17793 IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
17796 o Major bugfixes (key management):
17797 - If OpenSSL fails to generate an RSA key, do not retain a dangling
17798 pointer to the previous (uninitialized) key value. The impact here
17799 should be limited to a difficult-to-trigger crash, if OpenSSL is
17800 running an engine that makes key generation failures possible, or
17801 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
17802 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
17805 o Major bugfixes (testing):
17806 - Fix a bug that would block 'make test-network-all' on systems where
17807 IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
17808 - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
17809 bugfix on 0.2.8.1-alpha.
17811 o Minor features (clients):
17812 - Make clients, onion services, and bridge relays always use an
17813 encrypted begindir connection for directory requests. Resolves
17814 ticket 18483. Patch by "teor".
17816 o Minor features (fallback directory mirrors):
17817 - Give each fallback the same weight for client selection; restrict
17818 fallbacks to one per operator; report fallback directory detail
17819 changes when rebuilding list; add new fallback directory mirrors
17820 to the whitelist; and many other minor simplifications and fixes.
17821 Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
17822 0.2.8.1-alpha; patch by "teor".
17823 - Replace the 21 fallbacks generated in January 2016 and included in
17824 Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
17825 2016. Closes task 17158; patch by "teor".
17827 o Minor features (geoip):
17828 - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
17831 o Minor bugfixes (assert, portability):
17832 - Fix an assertion failure in memarea.c on systems where "long" is
17833 shorter than the size of a pointer. Fixes bug 18716; bugfix
17836 o Minor bugfixes (bootstrap):
17837 - Consistently use the consensus download schedule for authority
17838 certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
17840 o Minor bugfixes (build):
17841 - Remove a pair of redundant AM_CONDITIONAL declarations from
17842 configure.ac. Fixes one final case of bug 17744; bugfix
17844 - Resolve warnings when building on systems that are concerned with
17845 signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
17847 - When libscrypt.h is found, but no libscrypt library can be linked,
17848 treat libscrypt as absent. Fixes bug 19161; bugfix
17851 o Minor bugfixes (client):
17852 - Turn all TestingClientBootstrap* into non-testing torrc options.
17853 This changes simply renames them by removing "Testing" in front of
17854 them and they do not require TestingTorNetwork to be enabled
17855 anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
17856 - Make directory node selection more reliable, mainly for IPv6-only
17857 clients and clients with few reachable addresses. Fixes bug 18929;
17858 bugfix on 0.2.8.1-alpha. Patch by "teor".
17860 o Minor bugfixes (controller, microdescriptors):
17861 - Make GETINFO dir/status-vote/current/consensus conform to the
17862 control specification by returning "551 Could not open cached
17863 consensus..." when not caching consensuses. Fixes bug 18920;
17864 bugfix on 0.2.2.6-alpha.
17866 o Minor bugfixes (crypto, portability):
17867 - The SHA3 and SHAKE routines now produce the correct output on Big
17868 Endian systems. No code calls either algorithm yet, so this is
17869 primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
17870 - Tor now builds again with the recent OpenSSL 1.1 development
17871 branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
17874 o Minor bugfixes (directories):
17875 - When fetching extrainfo documents, compare their SHA256 digests
17876 and Ed25519 signing key certificates with the routerinfo that led
17877 us to fetch them, rather than with the most recent routerinfo.
17878 Otherwise we generate many spurious warnings about mismatches.
17879 Fixes bug 17150; bugfix on 0.2.7.2-alpha.
17881 o Minor bugfixes (logging):
17882 - When we can't generate a signing key because OfflineMasterKey is
17883 set, do not imply that we should have been able to load it. Fixes
17884 bug 18133; bugfix on 0.2.7.2-alpha.
17885 - Stop periodic_event_dispatch() from blasting twelve lines per
17886 second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
17887 - When rejecting a misformed INTRODUCE2 cell, only log at
17888 PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
17890 o Minor bugfixes (pluggable transports):
17891 - Avoid reporting a spurious error when we decide that we don't need
17892 to terminate a pluggable transport because it has already exited.
17893 Fixes bug 18686; bugfix on 0.2.5.5-alpha.
17895 o Minor bugfixes (pointer arithmetic):
17896 - Fix a bug in memarea_alloc() that could have resulted in remote
17897 heap write access, if Tor had ever passed an unchecked size to
17898 memarea_alloc(). Fortunately, all the sizes we pass to
17899 memarea_alloc() are pre-checked to be less than 128 kilobytes.
17900 Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
17903 o Minor bugfixes (relays):
17904 - Consider more config options when relays decide whether to
17905 regenerate their descriptor. Fixes more of bug 12538; bugfix
17907 - Resolve some edge cases where we might launch an ORPort
17908 reachability check even when DisableNetwork is set. Noticed while
17909 fixing bug 18616; bugfix on 0.2.3.9-alpha.
17911 o Minor bugfixes (statistics):
17912 - We now include consensus downloads via IPv6 in our directory-
17913 request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
17915 o Minor bugfixes (testing):
17916 - Allow directories in small networks to bootstrap by skipping
17917 DirPort checks when the consensus has no exits. Fixes bug 19003;
17918 bugfix on 0.2.8.1-alpha. Patch by teor.
17919 - Fix a small memory leak that would occur when the
17920 TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
17921 bugfix on 0.2.5.2-alpha.
17923 o Minor bugfixes (time handling):
17924 - When correcting a corrupt 'struct tm' value, fill in the tm_wday
17925 field. Otherwise, our unit tests crash on Windows. Fixes bug
17926 18977; bugfix on 0.2.2.25-alpha.
17929 - Document the contents of the 'datadir/keys' subdirectory in the
17930 manual page. Closes ticket 17621.
17931 - Stop recommending use of nicknames to identify relays in our
17932 MapAddress documentation. Closes ticket 18312.
17935 Changes in version 0.2.8.2-alpha - 2016-03-28
17936 Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
17937 bugs in earlier versions of Tor, including some that prevented
17938 authorities using Tor 0.2.7.x from running correctly. IPv6 and
17939 directory support should also be much improved.
17941 o New system requirements:
17942 - Tor no longer supports versions of OpenSSL with a broken
17943 implementation of counter mode. (This bug was present in OpenSSL
17944 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
17945 longer runs with, these versions.
17946 - Tor no longer attempts to support platforms where the "time_t"
17947 type is unsigned. (To the best of our knowledge, only OpenVMS does
17948 this, and Tor has never actually built on OpenVMS.) Closes
17950 - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
17951 later (released in 2008 and 2009 respectively). If you are
17952 building Tor from the git repository instead of from the source
17953 distribution, and your tools are older than this, you will need to
17954 upgrade. Closes ticket 17732.
17956 o Major bugfixes (security, pointers):
17957 - Avoid a difficult-to-trigger heap corruption attack when extending
17958 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
17959 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
17960 Reported by Guido Vranken.
17962 o Major bugfixes (bridges, pluggable transports):
17963 - Modify the check for OR connections to private addresses. Allow
17964 bridges on private addresses, including pluggable transports that
17965 ignore the (potentially private) address in the bridge line. Fixes
17966 bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
17968 o Major bugfixes (compilation):
17969 - Repair hardened builds under the clang compiler. Previously, our
17970 use of _FORTIFY_SOURCE would conflict with clang's address
17971 sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
17973 o Major bugfixes (crash on shutdown):
17974 - Correctly handle detaching circuits from muxes when shutting down.
17975 Fixes bug 18116; bugfix on 0.2.8.1-alpha.
17976 - Fix an assert-on-exit bug related to counting memory usage in
17977 rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
17979 o Major bugfixes (crash on startup):
17980 - Fix a segfault during startup: If a Unix domain socket was
17981 configured as listener (such as a ControlSocket or a SocksPort
17982 "unix:" socket), and tor was started as root but not configured to
17983 switch to another user, tor would segfault while trying to string
17984 compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
17987 o Major bugfixes (dns proxy mode, crash):
17988 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
17989 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
17991 o Major bugfixes (relays, bridge clients):
17992 - Ensure relays always allow IPv4 OR and Dir connections. Ensure
17993 bridge clients use the address configured in the bridge line.
17994 Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
17997 o Major bugfixes (voting):
17998 - Actually enable support for authorities to match routers by their
17999 Ed25519 identities. Previously, the code had been written, but
18000 some debugging code that had accidentally been left in the
18001 codebase made it stay turned off. Fixes bug 17702; bugfix
18003 - When collating votes by Ed25519 identities, authorities now
18004 include a "NoEdConsensus" flag if the ed25519 value (or lack
18005 thereof) for a server does not reflect the majority consensus.
18006 Related to bug 17668; bugfix on 0.2.7.2-alpha.
18007 - When generating a vote with keypinning disabled, never include two
18008 entries for the same ed25519 identity. This bug was causing
18009 authorities to generate votes that they could not parse when a
18010 router violated key pinning by changing its RSA identity but
18011 keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
18012 18318. Bugfix on 0.2.7.2-alpha.
18014 o Minor features (security, win32):
18015 - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
18016 attack. Fixes bug 18123; bugfix on all tor versions. Patch
18019 o Minor features (bug-resistance):
18020 - Make Tor survive errors involving connections without a
18021 corresponding event object. Previously we'd fail with an
18022 assertion; now we produce a log message. Related to bug 16248.
18024 o Minor features (build):
18025 - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
18026 as having possible IPFW support. Closes ticket 18448. Patch from
18027 Steven Chamberlain.
18029 o Minor features (code hardening):
18030 - Use tor_snprintf() and tor_vsnprintf() even in external and low-
18031 level code, to harden against accidental failures to NUL-
18032 terminate. Part of ticket 17852. Patch from jsturgix. Found
18035 o Minor features (crypto):
18036 - Validate the hard-coded Diffie-Hellman parameters and ensure that
18037 p is a safe prime, and g is a suitable generator. Closes
18040 o Minor features (geoip):
18041 - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
18044 o Minor features (hidden service directory):
18045 - Streamline relay-side hsdir handling: when relays consider whether
18046 to accept an uploaded hidden service descriptor, they no longer
18047 check whether they are one of the relays in the network that is
18048 "supposed" to handle that descriptor. Implements ticket 18332.
18050 o Minor features (IPv6):
18051 - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
18052 to 1, tor prefers IPv6 directory addresses.
18053 - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
18054 avoids using IPv4 for client OR and directory connections.
18055 - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
18056 "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
18057 "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
18059 o Minor features (linux seccomp2 sandbox):
18060 - Reject attempts to change our Address with "Sandbox 1" enabled.
18061 Changing Address with Sandbox turned on would never actually work,
18062 but previously it would fail in strange and confusing ways. Found
18063 while fixing 18548.
18065 o Minor features (robustness):
18066 - Exit immediately with an error message if the code attempts to use
18067 Libevent without having initialized it. This should resolve some
18068 frequently-made mistakes in our unit tests. Closes ticket 18241.
18070 o Minor features (unix domain sockets):
18071 - Add a new per-socket option, RelaxDirModeCheck, to allow creating
18072 Unix domain sockets without checking the permissions on the parent
18073 directory. (Tor checks permissions by default because some
18074 operating systems only check permissions on the parent directory.
18075 However, some operating systems do look at permissions on the
18076 socket, and tor's default check is unneeded.) Closes ticket 18458.
18079 o Minor bugfixes (exit policies, security):
18080 - Refresh an exit relay's exit policy when interface addresses
18081 change. Previously, tor only refreshed the exit policy when the
18082 configured external address changed. Fixes bug 18208; bugfix on
18083 0.2.7.3-rc. Patch by teor.
18085 o Minor bugfixes (security, hidden services):
18086 - Prevent hidden services connecting to client-supplied rendezvous
18087 addresses that are reserved as internal or multicast. Fixes bug
18088 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
18090 o Minor bugfixes (build):
18091 - Do not link the unit tests against both the testing and non-
18092 testing versions of the static libraries. Fixes bug 18490; bugfix
18094 - Avoid spurious failures from configure files related to calling
18095 exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
18096 0.2.0.1-alpha. Patch from "cypherpunks".
18097 - Silence spurious clang-scan warnings in the ed25519_donna code by
18098 explicitly initializing some objects. Fixes bug 18384; bugfix on
18099 0.2.7.2-alpha. Patch by teor.
18101 o Minor bugfixes (client, bootstrap):
18102 - Count receipt of new microdescriptors as progress towards
18103 bootstrapping. Previously, with EntryNodes set, Tor might not
18104 successfully repopulate the guard set on bootstrapping. Fixes bug
18105 16825; bugfix on 0.2.3.1-alpha.
18107 o Minor bugfixes (code correctness):
18108 - Update to the latest version of Trunnel, which tries harder to
18109 avoid generating code that can invoke memcpy(p,NULL,0). Bug found
18110 by clang address sanitizer. Fixes bug 18373; bugfix
18113 o Minor bugfixes (configuration):
18114 - Fix a tiny memory leak when parsing a port configuration ending in
18115 ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
18117 o Minor bugfixes (containers):
18118 - If we somehow attempt to construct a heap with more than
18119 1073741822 elements, avoid an integer overflow when maintaining
18120 the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
18122 o Minor bugfixes (correctness):
18123 - Fix a bad memory handling bug that would occur if we had queued a
18124 cell on a channel's incoming queue. Fortunately, we can't actually
18125 queue a cell like that as our code is constructed today, but it's
18126 best to avoid this kind of error, even if there isn't any code
18127 that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
18129 o Minor bugfixes (directory):
18130 - When generating a URL for a directory server on an IPv6 address,
18131 wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
18132 on 0.2.3.9-alpha. Patch from Malek.
18134 o Minor bugfixes (fallback directory mirrors):
18135 - When requesting extrainfo descriptors from a trusted directory
18136 server, check whether it is an authority or a fallback directory
18137 which supports extrainfo descriptors. Fixes bug 18489; bugfix on
18138 0.2.4.7-alpha. Reported by atagar, patch by teor.
18140 o Minor bugfixes (hidden service, client):
18141 - Handle the case where the user makes several fast consecutive
18142 requests to the same .onion address. Previously, the first six
18143 requests would each trigger a descriptor fetch, each picking a
18144 directory (there are 6 overall) and the seventh one would fail
18145 because no directories were left, thereby triggering a close on
18146 all current directory connections asking for the hidden service.
18147 The solution here is to not close the connections if we have
18148 pending directory fetches. Fixes bug 15937; bugfix
18151 o Minor bugfixes (hidden service, control port):
18152 - Add the onion address to the HS_DESC event for the UPLOADED action
18153 both on success or failure. It was previously hardcoded with
18154 UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
18156 o Minor bugfixes (hidden service, directory):
18157 - Bridges now refuse "rendezvous2" (hidden service descriptor)
18158 publish attempts. Suggested by ticket 18332.
18160 o Minor bugfixes (linux seccomp2 sandbox):
18161 - Allow the setrlimit syscall, and the prlimit and prlimit64
18162 syscalls, which some libc implementations use under the hood.
18163 Fixes bug 15221; bugfix on 0.2.5.1-alpha.
18164 - Avoid a 10-second delay when starting as a client with "Sandbox 1"
18165 enabled and no DNS resolvers configured. This should help TAILS
18166 start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
18167 - Fix the sandbox's interoperability with unix domain sockets under
18168 setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
18170 o Minor bugfixes (logging):
18171 - When logging information about an unparsable networkstatus vote or
18172 consensus, do not say "vote" when we mean consensus. Fixes bug
18173 18368; bugfix on 0.2.0.8-alpha.
18174 - Scrub service name in "unrecognized service ID" log messages.
18175 Fixes bug 18600; bugfix on 0.2.4.11-alpha.
18176 - Downgrade logs and backtraces about IP versions to info-level.
18177 Only log backtraces once each time tor runs. Assists in diagnosing
18178 bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
18179 Christian, patch by teor.
18181 o Minor bugfixes (memory safety):
18182 - Avoid freeing an uninitialized pointer when opening a socket fails
18183 in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
18184 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
18186 - Correctly duplicate addresses in get_interface_address6_list().
18187 Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
18188 patch by "cypherpunks".
18189 - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
18191 - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
18192 18672; bugfix on 0.2.5.1-alpha.
18194 o Minor bugfixes (private directory):
18195 - Prevent a race condition when creating private directories. Fixes
18196 part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
18197 Patch from jsturgix. Found with Flawfinder.
18199 o Minor bugfixes (test networks, IPv6):
18200 - Allow internal IPv6 addresses in descriptors in test networks.
18201 Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
18204 o Minor bugfixes (testing):
18205 - We no longer disable assertions in the unit tests when coverage is
18206 enabled. Instead, we require you to say --disable-asserts-in-tests
18207 to the configure script if you need assertions disabled in the
18208 unit tests (for example, if you want to perform branch coverage).
18209 Fixes bug 18242; bugfix on 0.2.7.1-alpha.
18211 o Minor bugfixes (time parsing):
18212 - Avoid overflow in tor_timegm when parsing dates in and after 2038
18213 on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
18214 0.0.2pre14. Patch by teor.
18216 o Minor bugfixes (tor-gencert):
18217 - Correctly handle the case where an authority operator enters a
18218 passphrase but sends an EOF before sending a newline. Fixes bug
18219 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
18221 o Code simplification and refactoring:
18222 - Quote all the string interpolations in configure.ac -- even those
18223 which we are pretty sure can't contain spaces. Closes ticket
18224 17744. Patch from zerosion.
18225 - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
18226 inplace, so there's no need to have a separate implementation for
18227 the non-inplace code. Closes ticket 18258. Patch from Malek.
18228 - Simplify return types for some crypto functions that can't
18229 actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
18232 - Change build messages to refer to "Fedora" instead of "Fedora
18233 Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
18234 Patches from "icanhasaccount" and "cypherpunks".
18236 o Removed features:
18237 - We no longer maintain an internal freelist in memarea.c.
18238 Allocators should be good enough to make this code unnecessary,
18239 and it's doubtful that it ever had any performance benefit.
18242 - Fix several warnings from clang's address sanitizer produced in
18244 - Treat backtrace test failures as expected on FreeBSD until we
18245 solve bug 17808. Closes ticket 18204.
18248 Changes in version 0.2.8.1-alpha - 2016-02-04
18249 Tor 0.2.8.1-alpha is the first alpha release in its series. It
18250 includes numerous small features and bugfixes against previous Tor
18251 versions, and numerous small infrastructure improvements. The most
18252 notable features are a set of improvements to the directory subsystem.
18254 o Major features (security, Linux):
18255 - When Tor starts as root on Linux and is told to switch user ID, it
18256 can now retain the capability to bind to low ports. By default,
18257 Tor will do this only when it's switching user ID and some low
18258 ports have been configured. You can change this behavior with the
18259 new option KeepBindCapabilities. Closes ticket 8195.
18261 o Major features (directory system):
18262 - When bootstrapping multiple consensus downloads at a time, use the
18263 first one that starts downloading, and close the rest. This
18264 reduces failures when authorities or fallback directories are slow
18265 or down. Together with the code for feature 15775, this feature
18266 should reduces failures due to fallback churn. Implements ticket
18267 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
18268 "mikeperry" and "teor".
18269 - Include a trial list of 21 default fallback directories, generated
18270 in January 2016, based on an opt-in survey of suitable relays.
18271 Doing this should make clients bootstrap more quickly and reliably,
18272 and reduce the load on the directory authorities. Closes ticket
18273 15775. Patch by "teor".
18274 Candidates identified using an OnionOO script by "weasel", "teor",
18275 "gsathya", and "karsten".
18276 - Previously only relays that explicitly opened a directory port
18277 (DirPort) accepted directory requests from clients. Now all
18278 relays, with and without a DirPort, accept and serve tunneled
18279 directory requests that they receive through their ORPort. You can
18280 disable this behavior using the new DirCache option. Closes
18283 o Major key updates:
18284 - Update the V3 identity key for the dannenberg directory authority:
18285 it was changed on 18 November 2015. Closes task 17906. Patch
18288 o Minor features (security, clock):
18289 - Warn when the system clock appears to move back in time (when the
18290 state file was last written in the future). Tor doesn't know that
18291 consensuses have expired if the clock is in the past. Patch by
18292 "teor". Implements ticket 17188.
18294 o Minor features (security, exit policies):
18295 - ExitPolicyRejectPrivate now rejects more private addresses by
18296 default. Specifically, it now rejects the relay's outbound bind
18297 addresses (if configured), and the relay's configured port
18298 addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
18299 0.2.0.11-alpha. Patch by "teor".
18301 o Minor features (security, memory erasure):
18302 - Set the unused entries in a smartlist to NULL. This helped catch
18303 a (harmless) bug, and shouldn't affect performance too much.
18304 Implements ticket 17026.
18305 - Use SecureMemoryWipe() function to securely clean memory on
18306 Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
18307 Implements feature 17986.
18308 - Use explicit_bzero or memset_s when present. Previously, we'd use
18309 OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
18310 from <logan@hackers.mu> and <selven@hackers.mu>.
18311 - Make memwipe() do nothing when passed a NULL pointer or buffer of
18312 zero size. Check size argument to memwipe() for underflow. Fixes
18313 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
18316 o Minor features (security, RNG):
18317 - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
18318 positively are not allowed to fail. Previously we depended on
18319 internal details of OpenSSL's behavior. Closes ticket 17686.
18320 - Never use the system entropy output directly for anything besides
18321 seeding the PRNG. When we want to generate important keys, instead
18322 of using system entropy directly, we now hash it with the PRNG
18323 stream. This may help resist certain attacks based on broken OS
18324 entropy implementations. Closes part of ticket 17694.
18325 - Use modern system calls (like getentropy() or getrandom()) to
18326 generate strong entropy on platforms that have them. Closes
18329 o Minor features (accounting):
18330 - Added two modes to the AccountingRule option: One for limiting
18331 only the number of bytes sent ("AccountingRule out"), and one for
18332 limiting only the number of bytes received ("AccountingRule in").
18333 Closes ticket 15989; patch from "unixninja92".
18335 o Minor features (build):
18336 - Since our build process now uses "make distcheck", we no longer
18337 force "make dist" to depend on "make check". Closes ticket 17893;
18338 patch from "cypherpunks."
18339 - Tor now builds successfully with the recent OpenSSL 1.1
18340 development branch, and with the latest LibreSSL. Closes tickets
18341 17549, 17921, and 17984.
18343 o Minor features (controller):
18344 - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
18345 tickets 16774 and 17817. Patch by George Tankersley.
18346 - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
18347 service descriptor from a service's local hidden service
18348 descriptor cache. Closes ticket 14846.
18349 - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
18350 controllers can examine the the reject rules added by
18351 ExitPolicyRejectPrivate. This makes it easier for stem to display
18354 o Minor features (crypto):
18355 - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
18357 - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
18358 - When allocating a digest state object, allocate no more space than
18359 we actually need. Previously, we would allocate as much space as
18360 the state for the largest algorithm would need. This change saves
18361 up to 672 bytes per circuit. Closes ticket 17796.
18362 - Improve performance when hashing non-multiple of 8 sized buffers,
18363 based on Andrew Moon's public domain SipHash-2-4 implementation.
18364 Fixes bug 17544; bugfix on 0.2.5.3-alpha.
18366 o Minor features (directory downloads):
18367 - Wait for busy authorities and fallback directories to become non-
18368 busy when bootstrapping. (A similar change was made in 6c443e987d
18369 for directory caches chosen from the consensus.) Closes ticket
18370 17864; patch by "teor".
18371 - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
18372 directory mirrors. The default is 1; set it to 0 to disable
18373 fallbacks. Implements ticket 17576. Patch by "teor".
18375 o Minor features (geoip):
18376 - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
18379 o Minor features (IPv6):
18380 - Add an argument 'ipv6=address:orport' to the DirAuthority and
18381 FallbackDir torrc options, to specify an IPv6 address for an
18382 authority or fallback directory. Add hard-coded ipv6 addresses for
18383 directory authorities that have them. Closes ticket 17327; patch
18384 from Nick Mathewson and "teor".
18385 - Add address policy assume_action support for IPv6 addresses.
18386 - Limit IPv6 mask bits to 128.
18387 - Warn when comparing against an AF_UNSPEC address in a policy, it's
18388 almost always a bug. Closes ticket 17863; patch by "teor".
18389 - Allow users to configure directory authorities and fallback
18390 directory servers with IPv6 addresses and ORPorts. Resolves
18392 - routerset_parse now accepts IPv6 literal addresses. Fixes bug
18393 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
18394 - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
18395 17638; bugfix on 0.0.2pre8. Patch by "teor".
18397 o Minor features (logging):
18398 - When logging to syslog, allow a tag to be added to the syslog
18399 identity (the string prepended to every log message). The tag can
18400 be configured with SyslogIdentityTag and defaults to none. Setting
18401 it to "foo" will cause logs to be tagged as "Tor-foo". Closes
18404 o Minor features (portability):
18405 - Use timingsafe_memcmp() where available. Closes ticket 17944;
18406 patch from <logan@hackers.mu>.
18408 o Minor features (relay, address discovery):
18409 - Add a family argument to get_interface_addresses_raw() and
18410 subfunctions to make network interface address interogation more
18411 efficient. Now Tor can specifically ask for IPv4, IPv6 or both
18412 types of interfaces from the operating system. Resolves
18414 - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
18415 fails to enumerate interface addresses using the platform-specific
18416 API, have it rely on the UDP socket fallback technique to try and
18417 find out what IP addresses (both IPv4 and IPv6) our machine has.
18418 Resolves ticket 17951.
18420 o Minor features (replay cache):
18421 - The replay cache now uses SHA256 instead of SHA1. Implements
18422 feature 8961. Patch by "teor", issue reported by "rransom".
18424 o Minor features (unix file permissions):
18425 - Defer creation of Unix sockets until after setuid. This avoids
18426 needing CAP_CHOWN and CAP_FOWNER when using systemd's
18427 CapabilityBoundingSet, or chown and fowner when using SELinux.
18428 Implements part of ticket 17562. Patch from Jamie Nguyen.
18429 - If any directory created by Tor is marked as group readable, the
18430 filesystem group is allowed to be either the default GID or the
18431 root user. Allowing root to read the DataDirectory prevents the
18432 need for CAP_READ_SEARCH when using systemd's
18433 CapabilityBoundingSet, or dac_read_search when using SELinux.
18434 Implements part of ticket 17562. Patch from Jamie Nguyen.
18435 - Introduce a new DataDirectoryGroupReadable option. If it is set to
18436 1, the DataDirectory will be made readable by the default GID.
18437 Implements part of ticket 17562. Patch from Jamie Nguyen.
18439 o Minor bugfixes (accounting):
18440 - The max bandwidth when using 'AccountRule sum' is now correctly
18441 logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
18442 from "unixninja92".
18444 o Minor bugfixes (code correctness):
18445 - When closing an entry connection, generate a warning if we should
18446 have sent an end cell for it but we haven't. Fixes bug 17876;
18447 bugfix on 0.2.3.2-alpha.
18448 - Assert that allocated memory held by the reputation code is freed
18449 according to its internal counters. Fixes bug 17753; bugfix
18451 - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
18454 o Minor bugfixes (compilation):
18455 - Mark all object files that include micro-revision.i as depending
18456 on it, so as to make parallel builds more reliable. Fixes bug
18457 17826; bugfix on 0.2.5.1-alpha.
18458 - Don't try to use the pthread_condattr_setclock() function unless
18459 it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
18460 17819; bugfix on 0.2.6.3-alpha.
18461 - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
18463 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
18464 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
18465 - Fix search for libevent libraries on OpenBSD (and other systems
18466 that install libevent 1 and libevent 2 in parallel). Fixes bug
18467 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
18468 - Isolate environment variables meant for tests from the rest of the
18469 build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
18470 - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
18472 - Remove config.log only from make distclean, not from make clean.
18473 Fixes bug 17924; bugfix on 0.2.4.1-alpha.
18475 o Minor bugfixes (crypto):
18476 - Check the return value of HMAC() and assert on failure. Fixes bug
18477 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
18479 o Minor bugfixes (fallback directories):
18480 - Mark fallbacks as "too busy" when they return a 503 response,
18481 rather than just marking authorities. Fixes bug 17572; bugfix on
18482 0.2.4.7-alpha. Patch by "teor".
18484 o Minor bugfixes (IPv6):
18485 - Update the limits in max_dl_per_request for IPv6 address length.
18486 Fixes bug 17573; bugfix on 0.2.1.5-alpha.
18488 o Minor bugfixes (linux seccomp2 sandbox):
18489 - Fix a crash when using offline master ed25519 keys with the Linux
18490 seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
18492 o Minor bugfixes (logging):
18493 - In log messages that include a function name, use __FUNCTION__
18494 instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
18495 with clang __PRETTY_FUNCTION__ has extra information we don't
18496 need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
18498 - Remove needless quotes from a log message about unparseable
18499 addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
18501 o Minor bugfixes (portability):
18502 - Remove an #endif from configure.ac so that we correctly detect the
18503 presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
18506 o Minor bugfixes (relays):
18507 - Check that both the ORPort and DirPort (if present) are reachable
18508 before publishing a relay descriptor. Otherwise, relays publish a
18509 descriptor with DirPort 0 when the DirPort reachability test takes
18510 longer than the ORPort reachability test. Fixes bug 18050; bugfix
18511 on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
18513 o Minor bugfixes (relays, hidden services):
18514 - Refuse connection requests to private OR addresses unless
18515 ExtendAllowPrivateAddresses is set. Previously, tor would connect,
18516 then refuse to send any cells to a private address. Fixes bugs
18517 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
18519 o Minor bugfixes (safe logging):
18520 - When logging a malformed hostname received through socks4, scrub
18521 it if SafeLogging says we should. Fixes bug 17419; bugfix
18524 o Minor bugfixes (statistics code):
18525 - Consistently check for overflow in round_*_to_next_multiple_of
18526 functions, and add unit tests with additional and maximal values.
18527 Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
18528 - Handle edge cases in the laplace functions: avoid division by
18529 zero, avoid taking the log of zero, and silence clang type
18530 conversion warnings using round and trunc. Add unit tests for edge
18531 cases with maximal values. Fixes part of bug 13192; bugfix
18534 o Minor bugfixes (testing):
18535 - The test for log_heartbeat was incorrectly failing in timezones
18536 with non-integer offsets. Instead of comparing the end of the time
18537 string against a constant, compare it to the output of
18538 format_local_iso_time when given the correct input. Fixes bug
18539 18039; bugfix on 0.2.5.4-alpha.
18540 - Make unit tests pass on IPv6-only systems, and systems without
18541 localhost addresses (like some FreeBSD jails). Fixes bug 17632;
18542 bugfix on 0.2.7.3-rc. Patch by "teor".
18543 - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
18545 - Check the full results of SHA256 and SHA512 digests in the unit
18546 tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
18548 o Code simplification and refactoring:
18549 - Move logging of redundant policy entries in
18550 policies_parse_exit_policy_internal into its own function. Closes
18551 ticket 17608; patch from "juce".
18552 - Extract the more complicated parts of circuit_mark_for_close()
18553 into a new function that we run periodically before circuits are
18554 freed. This change removes more than half of the functions
18555 currently in the "blob". Closes ticket 17218.
18556 - Clean up a little duplicated code in
18557 crypto_expand_key_material_TAP(). Closes ticket 17587; patch
18559 - Decouple the list of streams waiting to be attached to circuits
18560 from the overall connection list. This change makes it possible to
18561 attach streams quickly while simplifying Tor's callgraph and
18562 avoiding O(N) scans of the entire connection list. Closes
18564 - When a direct directory request fails immediately on launch,
18565 instead of relaunching that request from inside the code that
18566 launches it, instead mark the connection for teardown. This change
18567 simplifies Tor's callback and prevents the directory-request
18568 launching code from invoking itself recursively. Closes
18570 - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
18571 use them. Closes ticket 17926.
18574 - Add a description of the correct use of the '--keygen' command-
18575 line option. Closes ticket 17583; based on text by 's7r'.
18576 - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
18577 - Explain actual minima for BandwidthRate. Closes ticket 16382.
18578 - Fix a minor formatting typo in the manpage. Closes ticket 17791.
18579 - Mention torspec URL in the manpage and point the reader to it
18580 whenever we mention a document that belongs in torspce. Fixes
18583 o Removed features:
18584 - Remove client-side support for connecting to Tor relays running
18585 versions of Tor before 0.2.3.6-alpha. These relays didn't support
18586 the v3 TLS handshake protocol, and are no longer allowed on the
18587 Tor network. Implements the client side of ticket 11150. Based on
18588 patches by Tom van der Woerdt.
18591 - Add unit tests to check for common RNG failure modes, such as
18592 returning all zeroes, identical values, or incrementing values
18593 (OpenSSL's rand_predictable feature). Patch by "teor".
18594 - Log more information when the backtrace tests fail. Closes ticket
18595 17892. Patch from "cypherpunks."
18596 - Always test both ed25519 backends, so that we can be sure that our
18597 batch-open replacement code works. Part of ticket 16794.
18598 - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
18599 portion of ticket 16831.
18600 - More unit tests for compat_libevent.c, procmon.c, tortls.c,
18601 util_format.c, directory.c, and options_validate.c. Closes tickets
18602 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
18604 - Unit tests for directory_handle_command_get. Closes ticket 17004.
18605 Patch from Reinaldo de Souza Jr.
18608 Changes in version 0.2.7.6 - 2015-12-10
18609 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
18610 well as a minor bug in hidden service reliability.
18612 o Major bugfixes (guard selection):
18613 - Actually look at the Guard flag when selecting a new directory
18614 guard. When we implemented the directory guard design, we
18615 accidentally started treating all relays as if they have the Guard
18616 flag during guard selection, leading to weaker anonymity and worse
18617 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
18620 o Minor features (geoip):
18621 - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
18624 o Minor bugfixes (compilation):
18625 - When checking for net/pfvar.h, include netinet/in.h if possible.
18626 This fixes transparent proxy detection on OpenBSD. Fixes bug
18627 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
18628 - Fix a compilation warning with Clang 3.6: Do not check the
18629 presence of an address which can never be NULL. Fixes bug 17781.
18631 o Minor bugfixes (correctness):
18632 - When displaying an IPv6 exit policy, include the mask bits
18633 correctly even when the number is greater than 31. Fixes bug
18634 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
18635 - The wrong list was used when looking up expired intro points in a
18636 rend service object, causing what we think could be reachability
18637 issues for hidden services, and triggering a BUG log. Fixes bug
18638 16702; bugfix on 0.2.7.2-alpha.
18639 - Fix undefined behavior in the tor_cert_checksig function. Fixes
18640 bug 17722; bugfix on 0.2.7.2-alpha.
18643 Changes in version 0.2.7.5 - 2015-11-20
18644 The Tor 0.2.7 release series is dedicated to the memory of Tor user
18645 and privacy advocate Caspar Bowden (1961-2015). Caspar worked
18646 tirelessly to advocate human rights regardless of national borders,
18647 and oppose the encroachments of mass surveillance. He opposed national
18648 exceptionalism, he brought clarity to legal and policy debates, he
18649 understood and predicted the impact of mass surveillance on the world,
18650 and he laid the groundwork for resisting it. While serving on the Tor
18651 Project's board of directors, he brought us his uncompromising focus
18652 on technical excellence in the service of humankind. Caspar was an
18653 inimitable force for good and a wonderful friend. He was kind,
18654 humorous, generous, gallant, and believed we should protect one
18655 another without exception. We honor him here for his ideals, his
18656 efforts, and his accomplishments. Please honor his memory with works
18657 that would make him proud.
18659 Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
18661 The 0.2.7 series adds a more secure identity key type for relays,
18662 improves cryptography performance, resolves several longstanding
18663 hidden-service performance issues, improves controller support for
18664 hidden services, and includes small bugfixes and performance
18665 improvements throughout the program. This release series also includes
18666 more tests than before, and significant simplifications to which parts
18667 of Tor invoke which others.
18669 (This release contains no code changes since 0.2.7.4-rc.)
18672 Changes in version 0.2.7.4-rc - 2015-10-21
18673 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
18674 fixes some important memory leaks, and a scary-looking (but mostly
18675 harmless in practice) invalid-read bug. It also has a few small
18676 bugfixes, notably fixes for compilation and portability on different
18677 platforms. If no further significant bounds are found, the next
18678 release will the the official stable release.
18680 o Major bugfixes (security, correctness):
18681 - Fix an error that could cause us to read 4 bytes before the
18682 beginning of an openssl string. This bug could be used to cause
18683 Tor to crash on systems with unusual malloc implementations, or
18684 systems with unusual hardening installed. Fixes bug 17404; bugfix
18687 o Major bugfixes (correctness):
18688 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
18689 bug 17401; bugfix on 0.2.7.3-rc.
18691 o Major bugfixes (memory leaks):
18692 - Fix a memory leak in ed25519 batch signature checking. Fixes bug
18693 17398; bugfix on 0.2.6.1-alpha.
18694 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
18695 17402; bugfix on 0.2.7.3-rc.
18696 - Fix a memory leak when reading an expired signing key from disk.
18697 Fixes bug 17403; bugfix on 0.2.7.2-rc.
18699 o Minor features (geoIP):
18700 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
18703 o Minor bugfixes (compilation):
18704 - Repair compilation with the most recent (unreleased, alpha)
18705 vesions of OpenSSL 1.1. Fixes part of ticket 17237.
18706 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
18707 17251; bugfix on 0.2.7.2-alpha.
18708 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
18709 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
18711 o Minor bugfixes (portability):
18712 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
18713 part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
18716 o Minor bugfixes (sandbox):
18717 - Add the "hidserv-stats" filename to our sandbox filter for the
18718 HiddenServiceStatistics option to work properly. Fixes bug 17354;
18719 bugfix on 0.2.6.2-alpha. Patch from David Goulet.
18721 o Minor bugfixes (testing):
18722 - Add unit tests for get_interface_address* failure cases. Fixes bug
18723 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
18724 - Fix breakage when running 'make check' with BSD make. Fixes bug
18725 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
18726 - Make the get_ifaddrs_* unit tests more tolerant of different
18727 network configurations. (Don't assume every test box has an IPv4
18728 address, and don't assume every test box has a non-localhost
18729 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
18730 - Skip backtrace tests when backtrace support is not compiled in.
18731 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
18735 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
18736 - Note that HiddenServicePorts can take a unix domain socket. Closes
18740 Changes in version 0.2.7.3-rc - 2015-09-25
18741 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
18742 contains numerous usability fixes for Ed25519 keys, safeguards against
18743 several misconfiguration problems, significant simplifications to
18744 Tor's callgraph, and numerous bugfixes and small features.
18746 This is the most tested release of Tor to date. The unit tests cover
18747 39.40% of the code, and the integration tests (accessible with "make
18748 test-full-online", requiring stem and chutney and a network
18749 connection) raise the coverage to 64.49%.
18751 o Major features (security, hidden services):
18752 - Hidden services, if using the EntryNodes option, are required to
18753 use more than one EntryNode, in order to avoid a guard discovery
18754 attack. (This would only affect people who had configured hidden
18755 services and manually specified the EntryNodes option with a
18756 single entry-node. The impact was that it would be easy to
18757 remotely identify the guard node used by such a hidden service.
18758 See ticket for more information.) Fixes ticket 14917.
18760 o Major features (Ed25519 keys, keypinning):
18761 - The key-pinning option on directory authorities is now advisory-
18762 only by default. In a future version, or when the AuthDirPinKeys
18763 option is set, pins are enforced again. Disabling key-pinning
18764 seemed like a good idea so that we can survive the fallout of any
18765 usability problems associated with Ed25519 keys. Closes
18768 o Major features (Ed25519 performance):
18769 - Improve the speed of Ed25519 operations and Curve25519 keypair
18770 generation when built targeting 32 bit x86 platforms with SSE2
18771 available. Implements ticket 16535.
18772 - Improve the runtime speed of Ed25519 signature verification by
18773 using Ed25519-donna's batch verification support. Implements
18776 o Major features (performance testing):
18777 - The test-network.sh script now supports performance testing.
18778 Requires corresponding chutney performance testing changes. Patch
18779 by "teor". Closes ticket 14175.
18781 o Major features (relay, Ed25519):
18782 - Significant usability improvements for Ed25519 key management. Log
18783 messages are better, and the code can recover from far more
18784 failure conditions. Thanks to "s7r" for reporting and diagnosing
18786 - Add a new OfflineMasterKey option to tell Tor never to try loading
18787 or generating a secret Ed25519 identity key. You can use this in
18788 combination with tor --keygen to manage offline and/or encrypted
18789 Ed25519 keys. Implements ticket 16944.
18790 - Add a --newpass option to allow changing or removing the
18791 passphrase of an encrypted key with tor --keygen. Implements part
18793 - On receiving a HUP signal, check to see whether the Ed25519
18794 signing key has changed, and reload it if so. Closes ticket 16790.
18796 o Major bugfixes (relay, Ed25519):
18797 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
18798 0.2.7.2-alpha. Reported by "s7r".
18799 - Improve handling of expired signing keys with offline master keys.
18800 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
18802 o Minor features (client-side privacy):
18803 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
18804 lifespan when IsolateSOCKSAuth and streams with SOCKS
18805 authentication are attached to the circuit. This allows
18806 applications like TorBrowser to manage circuit lifetime on their
18807 own. Implements feature 15482.
18808 - When logging malformed hostnames from SOCKS5 requests, respect
18809 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
18811 o Minor features (compilation):
18812 - Give a warning as early as possible when trying to build with an
18813 unsupported OpenSSL version. Closes ticket 16901.
18814 - Fail during configure if we're trying to build against an OpenSSL
18815 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
18816 which started requiring ECC.
18818 o Minor features (geoip):
18819 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
18822 o Minor features (hidden services):
18823 - Relays need to have the Fast flag to get the HSDir flag. As this
18824 is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
18825 drop. This change should make some attacks against the hidden
18826 service directory system harder. Fixes ticket 15963.
18827 - Turn on hidden service statistics collection by setting the torrc
18828 option HiddenServiceStatistics to "1" by default. (This keeps
18829 track only of the fraction of traffic used by hidden services, and
18830 the total number of hidden services in existence.) Closes
18832 - Client now uses an introduction point failure cache to know when
18833 to fetch or keep a descriptor in their cache. Previously, failures
18834 were recorded implicitly, but not explicitly remembered. Closes
18837 o Minor features (testing, authorities, documentation):
18838 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
18839 explicitly manage consensus flags in testing networks. Patch by
18840 "robgjansen", modified by "teor". Implements part of ticket 14882.
18842 o Minor bugfixes (security, exit policies):
18843 - ExitPolicyRejectPrivate now also rejects the relay's published
18844 IPv6 address (if any), and any publicly routable IPv4 or IPv6
18845 addresses on any local interfaces. ticket 17027. Patch by "teor".
18846 Fixes bug 17027; bugfix on 0.2.0.11-alpha.
18848 o Minor bug fixes (torrc exit policies):
18849 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
18850 produce IPv6 wildcard addresses. Previously they would produce
18851 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
18852 of bug 16069; bugfix on 0.2.4.7-alpha.
18853 - When parsing torrc ExitPolicies, we now warn for a number of cases
18854 where the user's intent is likely to differ from Tor's actual
18855 behavior. These include: using an IPv4 address with an accept6 or
18856 reject6 line; using "private" on an accept6 or reject6 line; and
18857 including any ExitPolicy lines after accept *:* or reject *:*.
18858 Related to ticket 16069.
18859 - When parsing torrc ExitPolicies, we now issue an info-level
18860 message when expanding an "accept/reject *" line to include both
18861 IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
18862 - In each instance above, usage advice is provided to avoid the
18863 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
18864 16069; bugfix on 0.2.4.7-alpha.
18866 o Minor bugfixes (authority):
18867 - Don't assign "HSDir" to a router if it isn't Valid and Running.
18868 Fixes bug 16524; bugfix on 0.2.7.2-alpha.
18869 - Downgrade log messages about Ed25519 key issues if they are in old
18870 cached router descriptors. Fixes part of bug 16286; bugfix
18872 - When we find an Ed25519 key issue in a cached descriptor, stop
18873 saying the descriptor was just "uploaded". Fixes another part of
18874 bug 16286; bugfix on 0.2.7.2-alpha.
18876 o Minor bugfixes (control port):
18877 - Repair a warning and a spurious result when getting the maximum
18878 number of file descriptors from the controller. Fixes bug 16697;
18879 bugfix on 0.2.7.2-alpha.
18881 o Minor bugfixes (correctness):
18882 - When calling channel_free_list(), avoid calling smartlist_remove()
18883 while inside a FOREACH loop. This partially reverts commit
18884 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
18885 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
18887 o Minor bugfixes (documentation):
18888 - Advise users on how to configure separate IPv4 and IPv6 exit
18889 policies in the manpage and sample torrcs. Related to ticket 16069.
18890 - Fix the usage message of tor-resolve(1) so that it no longer lists
18891 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
18892 - Fix an error in the manual page and comments for
18893 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
18894 required "ORPort connectivity". While this is true, it is in no
18895 way unique to the HSDir flag. Of all the flags, only HSDirs need a
18896 DirPort configured in order for the authorities to assign that
18897 particular flag. Patch by "teor". Fixed as part of 14882; bugfix
18900 o Minor bugfixes (Ed25519):
18901 - Fix a memory leak when reading router descriptors with expired
18902 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
18904 o Minor bugfixes (linux seccomp2 sandbox):
18905 - Allow bridge authorities to run correctly under the seccomp2
18906 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
18907 - Allow routers with ed25519 keys to run correctly under the
18908 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
18910 o Minor bugfixes (open file limit):
18911 - Fix set_max_file_descriptors() to set by default the max open file
18912 limit to the current limit when setrlimit() fails. Fixes bug
18913 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
18915 o Minor bugfixes (portability):
18916 - Try harder to normalize the exit status of the Tor process to the
18917 standard-provided range. Fixes bug 16975; bugfix on every version
18919 - Check correctly for Windows socket errors in the workqueue
18920 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
18921 - Fix the behavior of crypto_rand_time_range() when told to consider
18922 times before 1970. (These times were possible when running in a
18923 simulated network environment where time()'s output starts at
18924 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
18925 - Restore correct operation of TLS client-cipher detection on
18926 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
18928 o Minor bugfixes (relay):
18929 - Ensure that worker threads actually exit when a fatal error or
18930 shutdown is indicated. This fix doesn't currently affect the
18931 behavior of Tor, because Tor workers never indicates fatal error
18932 or shutdown except in the unit tests. Fixes bug 16868; bugfix
18934 - Unblock threads before releasing the work queue mutex to ensure
18935 predictable scheduling behavior. Fixes bug 16644; bugfix
18938 o Code simplification and refactoring:
18939 - Change the function that's called when we need to retry all
18940 downloads so that it only reschedules the downloads to happen
18941 immediately, rather than launching them all at once itself. This
18942 further simplifies Tor's callgraph.
18943 - Move some format-parsing functions out of crypto.c and
18944 crypto_curve25519.c into crypto_format.c and/or util_format.c.
18945 - Move the client-only parts of init_keys() into a separate
18946 function. Closes ticket 16763.
18947 - Simplify the microdesc_free() implementation so that it no longer
18948 appears (to code analysis tools) to potentially invoke a huge
18949 suite of other microdesc functions.
18950 - Simply the control graph further by deferring the inner body of
18951 directory_all_unreachable() into a callback. Closes ticket 16762.
18952 - Treat the loss of an owning controller as equivalent to a SIGTERM
18953 signal. This removes a tiny amount of duplicated code, and
18954 simplifies our callgraph. Closes ticket 16788.
18955 - When generating an event to send to the controller, we no longer
18956 put the event over the network immediately. Instead, we queue
18957 these events, and use a Libevent callback to deliver them. This
18958 change simplifies Tor's callgraph by reducing the number of
18959 functions from which all other Tor functions are reachable. Closes
18961 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
18962 that try to scan or compile every file on Unix won't decide that
18964 - Remove the unused "nulterminate" argument from buf_pullup().
18967 - Recommend a 40 GB example AccountingMax in torrc.sample rather
18968 than a 4 GB max. Closes ticket 16742.
18969 - Include the TUNING document in our source tarball. It is referred
18970 to in the ChangeLog and an error message. Fixes bug 16929; bugfix
18974 - The internal pure-C tor-fw-helper tool is now removed from the Tor
18975 distribution, in favor of the pure-Go clone available from
18976 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
18977 used by the C tor-fw-helper are not, in our opinion, very
18978 confidence- inspiring in their secure-programming techniques.
18979 Closes ticket 13338.
18980 - Remove the code that would try to aggressively flush controller
18981 connections while writing to them. This code was introduced in
18982 0.1.2.7-alpha, in order to keep output buffers from exceeding
18983 their limits. But there is no longer a maximum output buffer size,
18984 and flushing data in this way caused some undesirable recursions
18985 in our call graph. Closes ticket 16480.
18988 - Make "bridges+hs" the default test network. This tests almost all
18989 tor functionality during make test-network, while allowing tests
18990 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
18991 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
18992 (chutney). Patches by "teor".
18993 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
18994 by-side in the same parent directory. Closes ticket 16903. Patch
18996 - Use environment variables rather than autoconf substitutions to
18997 send variables from the build system to the test scripts. This
18998 change should be easier to maintain, and cause 'make distcheck' to
18999 work better than before. Fixes bug 17148.
19000 - Add a new set of callgraph analysis scripts that use clang to
19001 produce a list of which Tor functions are reachable from which
19002 other Tor functions. We're planning to use these to help simplify
19003 our code structure by identifying illogical dependencies.
19004 - Add new 'test-full' and 'test-full-online' targets to run all
19005 tests, including integration tests with stem and chutney.
19006 - Make the test-workqueue test work on Windows by initializing the
19007 network before we begin.
19008 - New make target (make test-network-all) to run multiple applicable
19009 chutney test cases. Patch from Teor; closes 16953.
19010 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
19011 functions in dns.c. Implements a portion of ticket 16831.
19012 - When building Tor with testing coverage enabled, run Chutney tests
19013 (if any) using the 'tor-cov' coverage binary.
19014 - When running test-network or test-stem, check for the absence of
19015 stem/chutney before doing any build operations.
19018 Changes in version 0.2.7.2-alpha - 2015-07-27
19019 This, the second alpha in the Tor 0.2.7 series, has a number of new
19020 features, including a way to manually pick the number of introduction
19021 points for hidden services, and the much stronger Ed25519 signing key
19022 algorithm for regular Tor relays (including support for encrypted
19023 offline identity keys in the new algorithm).
19025 Support for Ed25519 on relays is currently limited to signing router
19026 descriptors; later alphas in this series will extend Ed25519 key
19027 support to more parts of the Tor protocol.
19029 o Major features (Ed25519 identity keys, Proposal 220):
19030 - All relays now maintain a stronger identity key, using the Ed25519
19031 elliptic curve signature format. This master key is designed so
19032 that it can be kept offline. Relays also generate an online
19033 signing key, and a set of other Ed25519 keys and certificates.
19034 These are all automatically regenerated and rotated as needed.
19035 Implements part of ticket 12498.
19036 - Directory authorities now vote on Ed25519 identity keys along with
19037 RSA1024 keys. Implements part of ticket 12498.
19038 - Directory authorities track which Ed25519 identity keys have been
19039 used with which RSA1024 identity keys, and do not allow them to
19040 vary freely. Implements part of ticket 12498.
19041 - Microdescriptors now include Ed25519 identity keys. Implements
19042 part of ticket 12498.
19043 - Add support for offline encrypted Ed25519 master keys. To use this
19044 feature on your tor relay, run "tor --keygen" to make a new master
19045 key (or to make a new signing key if you already have a master
19046 key). Closes ticket 13642.
19048 o Major features (Hidden services):
19049 - Add the torrc option HiddenServiceNumIntroductionPoints, to
19050 specify a fixed number of introduction points. Its maximum value
19051 is 10 and default is 3. Using this option can increase a hidden
19052 service's reliability under load, at the cost of making it more
19053 visible that the hidden service is facing extra load. Closes
19055 - Remove the adaptive algorithm for choosing the number of
19056 introduction points, which used to change the number of
19057 introduction points (poorly) depending on the number of
19058 connections the HS sees. Closes ticket 4862.
19060 o Major features (onion key cross-certification):
19061 - Relay descriptors now include signatures of their own identity
19062 keys, made using the TAP and ntor onion keys. These signatures
19063 allow relays to prove ownership of their own onion keys. Because
19064 of this change, microdescriptors will no longer need to include
19065 RSA identity keys. Implements proposal 228; closes ticket 12499.
19067 o Major features (performance):
19068 - Improve the runtime speed of Ed25519 operations by using the
19069 public-domain Ed25519-donna by Andrew M. ("floodyberry").
19070 Implements ticket 16467.
19071 - Improve the runtime speed of the ntor handshake by using an
19072 optimized curve25519 basepoint scalarmult implementation from the
19073 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
19074 ideas by Adam Langley. Implements ticket 9663.
19076 o Major bugfixes (client-side privacy, also in 0.2.6.9):
19077 - Properly separate out each SOCKSPort when applying stream
19078 isolation. The error occurred because each port's session group
19079 was being overwritten by a default value when the listener
19080 connection was initialized. Fixes bug 16247; bugfix on
19081 0.2.6.3-alpha. Patch by "jojelino".
19083 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
19084 - Stop refusing to store updated hidden service descriptors on a
19085 client. This reverts commit 9407040c59218 (which indeed fixed bug
19086 14219, but introduced a major hidden service reachability
19087 regression detailed in bug 16381). This is a temporary fix since
19088 we can live with the minor issue in bug 14219 (it just results in
19089 some load on the network) but the regression of 16381 is too much
19090 of a setback. First-round fix for bug 16381; bugfix
19093 o Major bugfixes (hidden services):
19094 - When cannibalizing a circuit for an introduction point, always
19095 extend to the chosen exit node (creating a 4 hop circuit).
19096 Previously Tor would use the current circuit exit node, which
19097 changed the original choice of introduction point, and could cause
19098 the hidden service to skip excluded introduction points or
19099 reconnect to a skipped introduction point. Fixes bug 16260; bugfix
19102 o Major bugfixes (open file limit):
19103 - The open file limit wasn't checked before calling
19104 tor_accept_socket_nonblocking(), which would make Tor exceed the
19105 limit. Now, before opening a new socket, Tor validates the open
19106 file limit just before, and if the max has been reached, return an
19107 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
19109 o Major bugfixes (stability, also in 0.2.6.10):
19110 - Stop crashing with an assertion failure when parsing certain kinds
19111 of malformed or truncated microdescriptors. Fixes bug 16400;
19112 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
19113 by "cypherpunks_backup".
19114 - Stop random client-side assertion failures that could occur when
19115 connecting to a busy hidden service, or connecting to a hidden
19116 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
19119 o Minor features (directory authorities, security, also in 0.2.6.9):
19120 - The HSDir flag given by authorities now requires the Stable flag.
19121 For the current network, this results in going from 2887 to 2806
19122 HSDirs. Also, it makes it harder for an attacker to launch a sybil
19123 attack by raising the effort for a relay to become Stable to
19124 require at the very least 7 days, while maintaining the 96 hours
19125 uptime requirement for HSDir. Implements ticket 8243.
19127 o Minor features (client):
19128 - Relax the validation of hostnames in SOCKS5 requests, allowing the
19129 character '_' to appear, in order to cope with domains observed in
19130 the wild that are serving non-RFC compliant records. Resolves
19132 - Relax the validation done to hostnames in SOCKS5 requests, and
19133 allow a single trailing '.' to cope with clients that pass FQDNs
19134 using that syntax to explicitly indicate that the domain name is
19135 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
19136 - Add GroupWritable and WorldWritable options to unix-socket based
19137 SocksPort and ControlPort options. These options apply to a single
19138 socket, and override {Control,Socks}SocketsGroupWritable. Closes
19141 o Minor features (control protocol):
19142 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
19143 the control protocol. Resolves ticket 15358.
19145 o Minor features (directory authorities):
19146 - Directory authorities no longer vote against the "Fast", "Stable",
19147 and "HSDir" flags just because they were going to vote against
19148 "Running": if the consensus turns out to be that the router was
19149 running, then the authority's vote should count. Patch from Peter
19150 Retzlaff; closes issue 8712.
19152 o Minor features (geoip, also in 0.2.6.10):
19153 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
19154 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
19156 o Minor features (hidden services):
19157 - Add the new options "HiddenServiceMaxStreams" and
19158 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
19159 limit the maximum number of simultaneous streams per circuit, and
19160 optionally tear down the circuit when the limit is exceeded. Part
19163 o Minor features (portability):
19164 - Use C99 variadic macros when the compiler is not GCC. This avoids
19165 failing compilations on MSVC, and fixes a log-file-based race
19166 condition in our old workarounds. Original patch from Gisle Vanem.
19168 o Minor bugfixes (compilation, also in 0.2.6.9):
19169 - Build with --enable-systemd correctly when libsystemd is
19170 installed, but systemd is not. Fixes bug 16164; bugfix on
19171 0.2.6.3-alpha. Patch from Peter Palfrader.
19173 o Minor bugfixes (controller):
19174 - Add the descriptor ID in each HS_DESC control event. It was
19175 missing, but specified in control-spec.txt. Fixes bug 15881;
19176 bugfix on 0.2.5.2-alpha.
19178 o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
19179 - Check for failures from crypto_early_init, and refuse to continue.
19180 A previous typo meant that we could keep going with an
19181 uninitialized crypto library, and would have OpenSSL initialize
19182 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
19183 when implementing ticket 4900. Patch by "teor".
19185 o Minor bugfixes (hidden services):
19186 - Fix a crash when reloading configuration while at least one
19187 configured and one ephemeral hidden service exists. Fixes bug
19188 16060; bugfix on 0.2.7.1-alpha.
19189 - Avoid crashing with a double-free bug when we create an ephemeral
19190 hidden service but adding it fails for some reason. Fixes bug
19191 16228; bugfix on 0.2.7.1-alpha.
19193 o Minor bugfixes (Linux seccomp2 sandbox):
19194 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
19195 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
19197 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
19198 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
19199 these when eventfd2() support is missing. Fixes bug 16363; bugfix
19200 on 0.2.6.3-alpha. Patch from "teor".
19202 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
19203 - Fix sandboxing to work when running as a relay, by allowing the
19204 renaming of secret_id_key, and allowing the eventfd2 and futex
19205 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
19207 - Allow systemd connections to work with the Linux seccomp2 sandbox
19208 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
19211 o Minor bugfixes (relay):
19212 - Fix a rarely-encountered memory leak when failing to initialize
19213 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
19214 from "cypherpunks".
19216 o Minor bugfixes (systemd):
19217 - Fix an accidental formatting error that broke the systemd
19218 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
19219 - Tor's systemd unit file no longer contains extraneous spaces.
19220 These spaces would sometimes confuse tools like deb-systemd-
19221 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
19223 o Minor bugfixes (tests):
19224 - Use the configured Python executable when running test-stem-full.
19225 Fixes bug 16470; bugfix on 0.2.7.1-alpha.
19227 o Minor bugfixes (tests, also in 0.2.6.9):
19228 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
19229 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
19231 o Minor bugfixes (threads, comments):
19232 - Always initialize return value in compute_desc_id in rendcommon.c
19233 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
19234 - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
19235 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
19236 - Remove undefined directive-in-macro in test_util_writepid clang
19237 3.7 complains that using a preprocessor directive inside a macro
19238 invocation in test_util_writepid in test_util.c is undefined.
19239 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
19241 o Code simplification and refactoring:
19242 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
19243 to ensure they remain consistent and visible everywhere.
19244 - Remove some vestigial workarounds for the MSVC6 compiler. We
19245 haven't supported that in ages.
19246 - The link authentication code has been refactored for better
19247 testability and reliability. It now uses code generated with the
19248 "trunnel" binary encoding generator, to reduce the risk of bugs
19249 due to programmer error. Done as part of ticket 12498.
19252 - Include a specific and (hopefully) accurate documentation of the
19253 torrc file's meta-format in doc/torrc_format.txt. This is mainly
19254 of interest to people writing programs to parse or generate torrc
19255 files. This document is not a commitment to long-term
19256 compatibility; some aspects of the current format are a bit
19257 ridiculous. Closes ticket 2325.
19259 o Removed features:
19260 - Tor no longer supports copies of OpenSSL that are missing support
19261 for Elliptic Curve Cryptography. (We began using ECC when
19262 available in 0.2.4.8-alpha, for more safe and efficient key
19263 negotiation.) In particular, support for at least one of P256 or
19264 P224 is now required, with manual configuration needed if only
19265 P224 is available. Resolves ticket 16140.
19266 - Tor no longer supports versions of OpenSSL before 1.0. (If you are
19267 on an operating system that has not upgraded to OpenSSL 1.0 or
19268 later, and you compile Tor from source, you will need to install a
19269 more recent OpenSSL to link Tor against.) These versions of
19270 OpenSSL are still supported by the OpenSSL, but the numerous
19271 cryptographic improvements in later OpenSSL releases makes them a
19272 clear choice. Resolves ticket 16034.
19273 - Remove the HidServDirectoryV2 option. Now all relays offer to
19274 store hidden service descriptors. Related to 16543.
19275 - Remove the VoteOnHidServDirectoriesV2 option, since all
19276 authorities have long set it to 1. Closes ticket 16543.
19279 - Document use of coverity, clang static analyzer, and clang dynamic
19280 undefined behavior and address sanitizers in doc/HACKING. Include
19281 detailed usage instructions in the blacklist. Patch by "teor".
19282 Closes ticket 15817.
19283 - The link authentication protocol code now has extensive tests.
19284 - The relay descriptor signature testing code now has
19286 - The test_workqueue program now runs faster, and is enabled by
19287 default as a part of "make check".
19288 - Now that OpenSSL has its own scrypt implementation, add an unit
19289 test that checks for interoperability between libscrypt_scrypt()
19290 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
19291 and rely on EVP_PBE_scrypt() whenever possible. Resolves
19295 Changes in version 0.2.6.10 - 2015-07-12
19296 Tor version 0.2.6.10 fixes some significant stability and hidden
19297 service client bugs, bulletproofs the cryptography init process, and
19298 fixes a bug when using the sandbox code with some older versions of
19299 Linux. Everyone running an older version, especially an older version
19300 of 0.2.6, should upgrade.
19302 o Major bugfixes (hidden service clients, stability):
19303 - Stop refusing to store updated hidden service descriptors on a
19304 client. This reverts commit 9407040c59218 (which indeed fixed bug
19305 14219, but introduced a major hidden service reachability
19306 regression detailed in bug 16381). This is a temporary fix since
19307 we can live with the minor issue in bug 14219 (it just results in
19308 some load on the network) but the regression of 16381 is too much
19309 of a setback. First-round fix for bug 16381; bugfix
19312 o Major bugfixes (stability):
19313 - Stop crashing with an assertion failure when parsing certain kinds
19314 of malformed or truncated microdescriptors. Fixes bug 16400;
19315 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
19316 by "cypherpunks_backup".
19317 - Stop random client-side assertion failures that could occur when
19318 connecting to a busy hidden service, or connecting to a hidden
19319 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
19322 o Minor features (geoip):
19323 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
19324 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
19326 o Minor bugfixes (crypto error-handling):
19327 - Check for failures from crypto_early_init, and refuse to continue.
19328 A previous typo meant that we could keep going with an
19329 uninitialized crypto library, and would have OpenSSL initialize
19330 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
19331 when implementing ticket 4900. Patch by "teor".
19333 o Minor bugfixes (Linux seccomp2 sandbox):
19334 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
19335 these when eventfd2() support is missing. Fixes bug 16363; bugfix
19336 on 0.2.6.3-alpha. Patch from "teor".
19339 Changes in version 0.2.6.9 - 2015-06-11
19340 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
19341 requirements for receiving an HSDir flag, and addresses some other small
19342 bugs in the systemd and sandbox code. Clients using circuit isolation
19343 should upgrade; all directory authorities should upgrade.
19345 o Major bugfixes (client-side privacy):
19346 - Properly separate out each SOCKSPort when applying stream
19347 isolation. The error occurred because each port's session group was
19348 being overwritten by a default value when the listener connection
19349 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
19352 o Minor feature (directory authorities, security):
19353 - The HSDir flag given by authorities now requires the Stable flag.
19354 For the current network, this results in going from 2887 to 2806
19355 HSDirs. Also, it makes it harder for an attacker to launch a sybil
19356 attack by raising the effort for a relay to become Stable which
19357 takes at the very least 7 days to do so and by keeping the 96
19358 hours uptime requirement for HSDir. Implements ticket 8243.
19360 o Minor bugfixes (compilation):
19361 - Build with --enable-systemd correctly when libsystemd is
19362 installed, but systemd is not. Fixes bug 16164; bugfix on
19363 0.2.6.3-alpha. Patch from Peter Palfrader.
19365 o Minor bugfixes (Linux seccomp2 sandbox):
19366 - Fix sandboxing to work when running as a relaymby renaming of
19367 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
19368 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
19369 - Allow systemd connections to work with the Linux seccomp2 sandbox
19370 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
19373 o Minor bugfixes (tests):
19374 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
19375 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
19378 Changes in version 0.2.6.8 - 2015-05-21
19379 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
19380 fixes an authority-side bug in assigning the HSDir flag. All directory
19381 authorities should upgrade.
19383 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
19384 - Revert commit that made directory authorities assign the HSDir
19385 flag to relays without a DirPort; this was bad because such relays
19386 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
19389 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
19390 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
19391 a client authorized hidden service. Fixes bug 15823; bugfix
19394 o Minor features (geoip):
19395 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
19396 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
19400 Changes in version 0.2.7.1-alpha - 2015-05-12
19401 Tor 0.2.7.1-alpha is the first alpha release in its series. It
19402 includes numerous small features and bugfixes against previous Tor
19403 versions, and numerous small infrastructure improvements. The most
19404 notable features are several new ways for controllers to interact with
19405 the hidden services subsystem.
19407 o New system requirements:
19408 - Tor no longer includes workarounds to support Libevent versions
19409 before 1.3e. Libevent 2.0 or later is recommended. Closes
19412 o Major features (controller):
19413 - Add the ADD_ONION and DEL_ONION commands that allow the creation
19414 and management of hidden services via the controller. Closes
19416 - New "GETINFO onions/current" and "GETINFO onions/detached"
19417 commands to get information about hidden services created via the
19418 controller. Part of ticket 6411.
19419 - New HSFETCH command to launch a request for a hidden service
19420 descriptor. Closes ticket 14847.
19421 - New HSPOST command to upload a hidden service descriptor. Closes
19422 ticket 3523. Patch by "DonnchaC".
19424 o Major bugfixes (hidden services):
19425 - Revert commit that made directory authorities assign the HSDir
19426 flag to relays without a DirPort; this was bad because such relays
19427 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
19430 o Minor features (clock-jump tolerance):
19431 - Recover better when our clock jumps back many hours, like might
19432 happen for Tails or Whonix users who start with a very wrong
19433 hardware clock, use Tor to discover a more accurate time, and then
19434 fix their clock. Resolves part of ticket 8766.
19436 o Minor features (command-line interface):
19437 - Make --hash-password imply --hush to prevent unnecessary noise.
19438 Closes ticket 15542. Patch from "cypherpunks".
19439 - Print a warning whenever we find a relative file path being used
19440 as torrc option. Resolves issue 14018.
19442 o Minor features (controller):
19443 - Add DirAuthority lines for default directory authorities to the
19444 output of the "GETINFO config/defaults" command if not already
19445 present. Implements ticket 14840.
19446 - Controllers can now use "GETINFO hs/client/desc/id/..." to
19447 retrieve items from the client's hidden service descriptor cache.
19448 Closes ticket 14845.
19449 - Implement a new controller command "GETINFO status/fresh-relay-
19450 descs" to fetch a descriptor/extrainfo pair that was generated on
19451 demand just for the controller's use. Implements ticket 14784.
19453 o Minor features (DoS-resistance):
19454 - Make it harder for attackers to overload hidden services with
19455 introductions, by blocking multiple introduction requests on the
19456 same circuit. Resolves ticket 15515.
19458 o Minor features (geoip):
19459 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
19460 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
19463 o Minor features (HS popularity countermeasure):
19464 - To avoid leaking HS popularity, don't cycle the introduction point
19465 when we've handled a fixed number of INTRODUCE2 cells but instead
19466 cycle it when a random number of introductions is reached, thus
19467 making it more difficult for an attacker to find out the amount of
19468 clients that have used the introduction point for a specific HS.
19469 Closes ticket 15745.
19471 o Minor features (logging):
19472 - Include the Tor version in all LD_BUG log messages, since people
19473 tend to cut and paste those into the bugtracker. Implements
19476 o Minor features (pluggable transports):
19477 - When launching managed pluggable transports on Linux systems,
19478 attempt to have the kernel deliver a SIGTERM on tor exit if the
19479 pluggable transport process is still running. Resolves
19481 - When launching managed pluggable transports, setup a valid open
19482 stdin in the child process that can be used to detect if tor has
19483 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
19484 can be used by implementations to detect this new behavior.
19485 Resolves ticket 15435.
19487 o Minor features (testing):
19488 - Add a test to verify that the compiler does not eliminate our
19489 memwipe() implementation. Closes ticket 15377.
19490 - Add make rule `check-changes` to verify the format of changes
19491 files. Closes ticket 15180.
19492 - Add unit tests for control_event_is_interesting(). Add a compile-
19493 time check that the number of events doesn't exceed the capacity
19494 of control_event_t.event_mask. Closes ticket 15431, checks for
19495 bugs similar to 13085. Patch by "teor".
19496 - Command-line argument tests moved to Stem. Resolves ticket 14806.
19497 - Integrate the ntor, backtrace, and zero-length keys tests into the
19498 automake test suite. Closes ticket 15344.
19499 - Remove assertions during builds to determine Tor's test coverage.
19500 We don't want to trigger these even in assertions, so including
19501 them artificially makes our branch coverage look worse than it is.
19502 This patch provides the new test-stem-full and coverage-html-full
19503 configure options. Implements ticket 15400.
19505 o Minor bugfixes (build):
19506 - Improve out-of-tree builds by making non-standard rules work and
19507 clean up additional files and directories. Fixes bug 15053; bugfix
19510 o Minor bugfixes (command-line interface):
19511 - When "--quiet" is provided along with "--validate-config", do not
19512 write anything to stdout on success. Fixes bug 14994; bugfix
19514 - When complaining about bad arguments to "--dump-config", use
19515 stderr, not stdout.
19517 o Minor bugfixes (configuration, unit tests):
19518 - Only add the default fallback directories when the DirAuthorities,
19519 AlternateDirAuthority, and FallbackDir directory config options
19520 are set to their defaults. The default fallback directory list is
19521 currently empty, this fix will only change tor's behavior when it
19522 has default fallback directories. Includes unit tests for
19523 consider_adding_dir_servers(). Fixes bug 15642; bugfix on
19524 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
19526 o Minor bugfixes (correctness):
19527 - For correctness, avoid modifying a constant string in
19528 handle_control_postdescriptor. Fixes bug 15546; bugfix
19530 - Remove side-effects from tor_assert() calls. This was harmless,
19531 because we never disable assertions, but it is bad style and
19532 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
19535 o Minor bugfixes (hidden service):
19536 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
19537 a client authorized hidden service. Fixes bug 15823; bugfix
19539 - Remove an extraneous newline character from the end of hidden
19540 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
19542 o Minor bugfixes (interface):
19543 - Print usage information for --dump-config when it is used without
19544 an argument. Also, fix the error message to use different wording
19545 and add newline at the end. Fixes bug 15541; bugfix
19548 o Minor bugfixes (logs):
19549 - When building Tor under Clang, do not include an extra set of
19550 parentheses in log messages that include function names. Fixes bug
19551 15269; bugfix on every released version of Tor when compiled with
19552 recent enough Clang.
19554 o Minor bugfixes (network):
19555 - When attempting to use fallback technique for network interface
19556 lookup, disregard loopback and multicast addresses since they are
19557 unsuitable for public communications.
19559 o Minor bugfixes (statistics):
19560 - Disregard the ConnDirectionStatistics torrc options when Tor is
19561 not a relay since in that mode of operation no sensible data is
19562 being collected and because Tor might run into measurement hiccups
19563 when running as a client for some time, then becoming a relay.
19564 Fixes bug 15604; bugfix on 0.2.2.35.
19566 o Minor bugfixes (test networks):
19567 - When self-testing reachability, use ExtendAllowPrivateAddresses to
19568 determine if local/private addresses imply reachability. The
19569 previous fix used TestingTorNetwork, which implies
19570 ExtendAllowPrivateAddresses, but this excluded rare configurations
19571 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
19572 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
19573 issue discovered by CJ Ess.
19575 o Minor bugfixes (testing):
19576 - Check for matching value in server response in ntor_ref.py. Fixes
19577 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
19579 - Set the severity correctly when testing
19580 get_interface_addresses_ifaddrs() and
19581 get_interface_addresses_win32(), so that the tests fail gracefully
19582 instead of triggering an assertion. Fixes bug 15759; bugfix on
19583 0.2.6.3-alpha. Reported by Nicolas Derive.
19585 o Code simplification and refactoring:
19586 - Move the hacky fallback code out of get_interface_address6() into
19587 separate function and get it covered with unit-tests. Resolves
19589 - Refactor hidden service client-side cache lookup to intelligently
19590 report its various failure cases, and disentangle failure cases
19591 involving a lack of introduction points. Closes ticket 14391.
19592 - Use our own Base64 encoder instead of OpenSSL's, to allow more
19593 control over the output. Part of ticket 15652.
19596 - Improve the descriptions of statistics-related torrc options in
19597 the manpage to describe rationale and possible uses cases. Fixes
19599 - Improve the layout and formatting of ./configure --help messages.
19600 Closes ticket 15024. Patch from "cypherpunks".
19601 - Standardize on the term "server descriptor" in the manual page.
19602 Previously, we had used "router descriptor", "server descriptor",
19603 and "relay descriptor" interchangeably. Part of ticket 14987.
19606 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
19607 and always use the internal Base64 decoder. The internal decoder
19608 has been part of tor since 0.2.0.10-alpha, and no one should
19609 be using the OpenSSL one. Part of ticket 15652.
19610 - Remove the 'tor_strclear()' function; use memwipe() instead.
19611 Closes ticket 14922.
19613 o Removed features:
19614 - Remove the (seldom-used) DynamicDHGroups feature. For anti-
19615 fingerprinting we now recommend pluggable transports; for forward-
19616 secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
19617 - Remove the undocumented "--digests" command-line option. It
19618 complicated our build process, caused subtle build issues on
19619 multiple platforms, and is now redundant since we started
19620 including git version identifiers. Closes ticket 14742.
19621 - Tor no longer contains checks for ancient directory cache versions
19622 that didn't know about microdescriptors.
19623 - Tor no longer contains workarounds for stat files generated by
19624 super-old versions of Tor that didn't choose guards sensibly.
19627 Changes in version 0.2.4.27 - 2015-04-06
19628 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
19629 could be used by an attacker to crash hidden services, or crash clients
19630 visiting hidden services. Hidden services should upgrade as soon as
19631 possible; clients should upgrade whenever packages become available.
19633 This release also backports a simple improvement to make hidden
19634 services a bit less vulnerable to denial-of-service attacks.
19636 o Major bugfixes (security, hidden service):
19637 - Fix an issue that would allow a malicious client to trigger an
19638 assertion failure and halt a hidden service. Fixes bug 15600;
19639 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
19640 - Fix a bug that could cause a client to crash with an assertion
19641 failure when parsing a malformed hidden service descriptor. Fixes
19642 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
19644 o Minor features (DoS-resistance, hidden service):
19645 - Introduction points no longer allow multiple INTRODUCE1 cells to
19646 arrive on the same circuit. This should make it more expensive for
19647 attackers to overwhelm hidden services with introductions.
19648 Resolves ticket 15515.
19651 Changes in version 0.2.5.12 - 2015-04-06
19652 Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
19653 could be used by an attacker to crash hidden services, or crash clients
19654 visiting hidden services. Hidden services should upgrade as soon as
19655 possible; clients should upgrade whenever packages become available.
19657 This release also backports a simple improvement to make hidden
19658 services a bit less vulnerable to denial-of-service attacks.
19660 o Major bugfixes (security, hidden service):
19661 - Fix an issue that would allow a malicious client to trigger an
19662 assertion failure and halt a hidden service. Fixes bug 15600;
19663 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
19664 - Fix a bug that could cause a client to crash with an assertion
19665 failure when parsing a malformed hidden service descriptor. Fixes
19666 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
19668 o Minor features (DoS-resistance, hidden service):
19669 - Introduction points no longer allow multiple INTRODUCE1 cells to
19670 arrive on the same circuit. This should make it more expensive for
19671 attackers to overwhelm hidden services with introductions.
19672 Resolves ticket 15515.
19675 Changes in version 0.2.6.7 - 2015-04-06
19676 Tor 0.2.6.7 fixes two security issues that could be used by an
19677 attacker to crash hidden services, or crash clients visiting hidden
19678 services. Hidden services should upgrade as soon as possible; clients
19679 should upgrade whenever packages become available.
19681 This release also contains two simple improvements to make hidden
19682 services a bit less vulnerable to denial-of-service attacks.
19684 o Major bugfixes (security, hidden service):
19685 - Fix an issue that would allow a malicious client to trigger an
19686 assertion failure and halt a hidden service. Fixes bug 15600;
19687 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
19688 - Fix a bug that could cause a client to crash with an assertion
19689 failure when parsing a malformed hidden service descriptor. Fixes
19690 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
19692 o Minor features (DoS-resistance, hidden service):
19693 - Introduction points no longer allow multiple INTRODUCE1 cells to
19694 arrive on the same circuit. This should make it more expensive for
19695 attackers to overwhelm hidden services with introductions.
19696 Resolves ticket 15515.
19697 - Decrease the amount of reattempts that a hidden service performs
19698 when its rendezvous circuits fail. This reduces the computational
19699 cost for running a hidden service under heavy load. Resolves
19703 Changes in version 0.2.6.6 - 2015-03-24
19704 Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
19706 It adds numerous safety, security, correctness, and performance
19707 improvements. Client programs can be configured to use more kinds of
19708 sockets, AutomapHosts works better, the multithreading backend is
19709 improved, cell transmission is refactored, test coverage is much
19710 higher, more denial-of-service attacks are handled, guard selection is
19711 improved to handle long-term guards better, pluggable transports
19712 should work a bit better, and some annoying hidden service performance
19713 bugs should be addressed.
19715 o Minor bugfixes (portability):
19716 - Use the correct datatype in the SipHash-2-4 function to prevent
19717 compilers from assuming any sort of alignment. Fixes bug 15436;
19718 bugfix on 0.2.5.3-alpha.
19720 Changes in version 0.2.6.5-rc - 2015-03-18
19721 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
19722 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
19724 o Major bugfixes (client):
19725 - Avoid crashing when making certain configuration option changes on
19726 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
19729 o Major bugfixes (pluggable transports):
19730 - Initialize the extended OR Port authentication cookie before
19731 launching pluggable transports. This prevents a race condition
19732 that occurred when server-side pluggable transports would cache the
19733 authentication cookie before it has been (re)generated. Fixes bug
19734 15240; bugfix on 0.2.5.1-alpha.
19736 o Major bugfixes (portability):
19737 - Do not crash on startup when running on Solaris. Fixes a bug
19738 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
19741 o Minor features (heartbeat):
19742 - On relays, report how many connections we negotiated using each
19743 version of the Tor link protocols. This information will let us
19744 know if removing support for very old versions of the Tor
19745 protocols is harming the network. Closes ticket 15212.
19747 o Code simplification and refactoring:
19748 - Refactor main loop to extract the 'loop' part. This makes it
19749 easier to run Tor under Shadow. Closes ticket 15176.
19752 Changes in version 0.2.5.11 - 2015-03-17
19753 Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
19755 It backports several bugfixes from the 0.2.6 branch, including a
19756 couple of medium-level security fixes for relays and exit nodes.
19757 It also updates the list of directory authorities.
19759 o Directory authority changes:
19760 - Remove turtles as a directory authority.
19761 - Add longclaw as a new (v3) directory authority. This implements
19762 ticket 13296. This keeps the directory authority count at 9.
19763 - The directory authority Faravahar has a new IP address. This
19764 closes ticket 14487.
19766 o Major bugfixes (crash, OSX, security):
19767 - Fix a remote denial-of-service opportunity caused by a bug in
19768 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
19771 o Major bugfixes (relay, stability, possible security):
19772 - Fix a bug that could lead to a relay crashing with an assertion
19773 failure if a buffer of exactly the wrong layout was passed to
19774 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
19775 0.2.0.10-alpha. Patch from 'cypherpunks'.
19776 - Do not assert if the 'data' pointer on a buffer is advanced to the
19777 very end of the buffer; log a BUG message instead. Only assert if
19778 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
19780 o Major bugfixes (exit node stability):
19781 - Fix an assertion failure that could occur under high DNS load.
19782 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
19783 diagnosed and fixed by "cypherpunks".
19785 o Major bugfixes (Linux seccomp2 sandbox):
19786 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
19787 crash during attempts to call wait4. Fixes bug 15088; bugfix on
19788 0.2.5.1-alpha. Patch from "sanic".
19790 o Minor features (controller):
19791 - New "GETINFO bw-event-cache" to get information about recent
19792 bandwidth events. Closes ticket 14128. Useful for controllers to
19793 get recent bandwidth history after the fix for ticket 13988.
19795 o Minor features (geoip):
19796 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
19797 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
19800 o Minor bugfixes (client, automapping):
19801 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
19802 no value follows the option. Fixes bug 14142; bugfix on
19803 0.2.4.7-alpha. Patch by "teor".
19804 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
19805 14195; bugfix on 0.1.0.1-rc.
19807 o Minor bugfixes (compilation):
19808 - Build without warnings with the stock OpenSSL srtp.h header, which
19809 has a duplicate declaration of SSL_get_selected_srtp_profile().
19810 Fixes bug 14220; this is OpenSSL's bug, not ours.
19812 o Minor bugfixes (directory authority):
19813 - Allow directory authorities to fetch more data from one another if
19814 they find themselves missing lots of votes. Previously, they had
19815 been bumping against the 10 MB queued data limit. Fixes bug 14261;
19816 bugfix on 0.1.2.5-alpha.
19817 - Enlarge the buffer to read bwauth generated files to avoid an
19818 issue when parsing the file in dirserv_read_measured_bandwidths().
19819 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
19821 o Minor bugfixes (statistics):
19822 - Increase period over which bandwidth observations are aggregated
19823 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
19825 o Minor bugfixes (preventative security, C safety):
19826 - When reading a hexadecimal, base-32, or base-64 encoded value from
19827 a string, always overwrite the whole output buffer. This prevents
19828 some bugs where we would look at (but fortunately, not reveal)
19829 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
19833 Changes in version 0.2.4.26 - 2015-03-17
19834 Tor 0.2.4.26 includes an updated list of directory authorities. It
19835 also backports a couple of stability and security bugfixes from 0.2.5
19838 o Directory authority changes:
19839 - Remove turtles as a directory authority.
19840 - Add longclaw as a new (v3) directory authority. This implements
19841 ticket 13296. This keeps the directory authority count at 9.
19842 - The directory authority Faravahar has a new IP address. This
19843 closes ticket 14487.
19845 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
19846 - Fix an assertion failure that could occur under high DNS load.
19847 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
19848 diagnosed and fixed by "cypherpunks".
19850 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
19851 - Fix a bug that could lead to a relay crashing with an assertion
19852 failure if a buffer of exactly the wrong layout was passed to
19853 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
19854 0.2.0.10-alpha. Patch from 'cypherpunks'.
19855 - Do not assert if the 'data' pointer on a buffer is advanced to the
19856 very end of the buffer; log a BUG message instead. Only assert if
19857 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
19859 o Minor features (geoip):
19860 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
19861 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
19864 Changes in version 0.2.6.4-rc - 2015-03-09
19865 Tor 0.2.6.4-alpha fixes an issue in the directory code that an
19866 attacker might be able to use in order to crash certain Tor
19867 directories. It also resolves some minor issues left over from, or
19868 introduced in, Tor 0.2.6.3-alpha or earlier.
19870 o Major bugfixes (crash, OSX, security):
19871 - Fix a remote denial-of-service opportunity caused by a bug in
19872 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
19875 o Major bugfixes (relay, stability, possible security):
19876 - Fix a bug that could lead to a relay crashing with an assertion
19877 failure if a buffer of exactly the wrong layout is passed to
19878 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
19879 0.2.0.10-alpha. Patch from "cypherpunks".
19880 - Do not assert if the 'data' pointer on a buffer is advanced to the
19881 very end of the buffer; log a BUG message instead. Only assert if
19882 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
19884 o Major bugfixes (FreeBSD IPFW transparent proxy):
19885 - Fix address detection with FreeBSD transparent proxies, when
19886 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
19889 o Major bugfixes (Linux seccomp2 sandbox):
19890 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
19891 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
19893 - Allow AF_UNIX hidden services to be used with the seccomp2
19894 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
19895 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
19896 crash during attempts to call wait4. Fixes bug 15088; bugfix on
19897 0.2.5.1-alpha. Patch from "sanic".
19899 o Minor features (controller):
19900 - Messages about problems in the bootstrap process now include
19901 information about the server we were trying to connect to when we
19902 noticed the problem. Closes ticket 15006.
19904 o Minor features (geoip):
19905 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
19906 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
19909 o Minor features (logs):
19910 - Quiet some log messages in the heartbeat and at startup. Closes
19913 o Minor bugfixes (certificate handling):
19914 - If an authority operator accidentally makes a signing certificate
19915 with a future publication time, do not discard its real signing
19916 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
19917 - Remove any old authority certificates that have been superseded
19918 for at least two days. Previously, we would keep superseded
19919 certificates until they expired, if they were published close in
19920 time to the certificate that superseded them. Fixes bug 11454;
19921 bugfix on 0.2.1.8-alpha.
19923 o Minor bugfixes (compilation):
19924 - Fix a compilation warning on s390. Fixes bug 14988; bugfix
19926 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
19929 o Minor bugfixes (testing):
19930 - Fix endianness issues in unit test for resolve_my_address() to
19931 have it pass on big endian systems. Fixes bug 14980; bugfix on
19933 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
19934 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
19935 - When running the new 'make test-stem' target, use the configured
19936 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
19937 from "cypherpunks".
19938 - When running the zero-length-keys tests, do not use the default
19939 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
19942 o Directory authority IP change:
19943 - The directory authority Faravahar has a new IP address. This
19944 closes ticket 14487.
19947 - Remove some lingering dead code that once supported mempools.
19948 Mempools were disabled by default in 0.2.5, and removed entirely
19949 in 0.2.6.3-alpha. Closes more of ticket 14848; patch
19953 Changes in version 0.2.6.3-alpha - 2015-02-19
19954 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
19955 the 0.2.6.x series. It introduces support for more kinds of sockets,
19956 makes it harder to accidentally run an exit, improves our
19957 multithreading backend, incorporates several fixes for the
19958 AutomapHostsOnResolve option, and fixes numerous other bugs besides.
19960 If no major regressions or security holes are found in this version,
19961 the next version will be a release candidate.
19963 o Deprecated versions:
19964 - Tor relays older than 0.2.4.18-rc are no longer allowed to
19965 advertise themselves on the network. Closes ticket 13555.
19967 o Major features (security, unix domain sockets):
19968 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
19969 applications can reach Tor without having to create AF_INET or
19970 AF_INET6 sockets, meaning they can completely disable their
19971 ability to make non-Tor network connections. To create a socket of
19972 this type, use "SocksPort unix:/path/to/socket". Implements
19974 - Support mapping hidden service virtual ports to AF_UNIX sockets.
19975 The syntax is "HiddenServicePort 80 unix:/path/to/socket".
19976 Implements ticket 11485.
19978 o Major features (changed defaults):
19979 - Prevent relay operators from unintentionally running exits: When a
19980 relay is configured as an exit node, we now warn the user unless
19981 the "ExitRelay" option is set to 1. We warn even more loudly if
19982 the relay is configured with the default exit policy, since this
19983 can indicate accidental misconfiguration. Setting "ExitRelay 0"
19984 stops Tor from running as an exit relay. Closes ticket 10067.
19986 o Major features (directory system):
19987 - When downloading server- or microdescriptors from a directory
19988 server, we no longer launch multiple simultaneous requests to the
19989 same server. This reduces load on the directory servers,
19990 especially when directory guards are in use. Closes ticket 9969.
19991 - When downloading server- or microdescriptors over a tunneled
19992 connection, do not limit the length of our requests to what the
19993 Squid proxy is willing to handle. Part of ticket 9969.
19994 - Authorities can now vote on the correct digests and latest
19995 versions for different software packages. This allows packages
19996 that include Tor to use the Tor authority system as a way to get
19997 notified of updates and their correct digests. Implements proposal
19998 227. Closes ticket 10395.
20000 o Major features (guards):
20001 - Introduce the Guardfraction feature to improves load balancing on
20002 guard nodes. Specifically, it aims to reduce the traffic gap that
20003 guard nodes experience when they first get the Guard flag. This is
20004 a required step if we want to increase the guard lifetime to 9
20005 months or greater. Closes ticket 9321.
20007 o Major features (performance):
20008 - Make the CPU worker implementation more efficient by avoiding the
20009 kernel and lengthening pipelines. The original implementation used
20010 sockets to transfer data from the main thread to the workers, and
20011 didn't allow any thread to be assigned more than a single piece of
20012 work at once. The new implementation avoids communications
20013 overhead by making requests in shared memory, avoiding kernel IO
20014 where possible, and keeping more requests in flight at once.
20015 Implements ticket 9682.
20017 o Major features (relay):
20018 - Raise the minimum acceptable configured bandwidth rate for bridges
20019 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
20020 20 KiB/sec.) Closes ticket 13822.
20022 o Major bugfixes (exit node stability):
20023 - Fix an assertion failure that could occur under high DNS load.
20024 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20025 diagnosed and fixed by "cypherpunks".
20027 o Major bugfixes (mixed relay-client operation):
20028 - When running as a relay and client at the same time (not
20029 recommended), if we decide not to use a new guard because we want
20030 to retry older guards, only close the locally-originating circuits
20031 passing through that guard. Previously we would close all the
20032 circuits through that guard. Fixes bug 9819; bugfix on
20033 0.2.1.1-alpha. Reported by "skruffy".
20035 o Minor features (build):
20036 - New --disable-system-torrc compile-time option to prevent Tor from
20037 looking for the system-wide torrc or torrc-defaults files.
20038 Resolves ticket 13037.
20040 o Minor features (controller):
20041 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
20042 events so controllers can observe circuit isolation inputs. Closes
20044 - ControlPort now supports the unix:/path/to/socket syntax as an
20045 alternative to the ControlSocket option, for consistency with
20046 SocksPort and HiddenServicePort. Closes ticket 14451.
20047 - New "GETINFO bw-event-cache" to get information about recent
20048 bandwidth events. Closes ticket 14128. Useful for controllers to
20049 get recent bandwidth history after the fix for ticket 13988.
20051 o Minor features (Denial of service resistance):
20052 - Count the total number of bytes used storing hidden service
20053 descriptors against the value of MaxMemInQueues. If we're low on
20054 memory, and more than 20% of our memory is used holding hidden
20055 service descriptors, free them until no more than 10% of our
20056 memory holds hidden service descriptors. Free the least recently
20057 fetched descriptors first. Resolves ticket 13806.
20058 - When we have recently been under memory pressure (over 3/4 of
20059 MaxMemInQueues is allocated), then allocate smaller zlib objects
20060 for small requests. Closes ticket 11791.
20062 o Minor features (geoip):
20063 - Update geoip and geoip6 files to the January 7 2015 Maxmind
20064 GeoLite2 Country database.
20066 o Minor features (guard nodes):
20067 - Reduce the time delay before saving guard status to disk from 10
20068 minutes to 30 seconds (or from one hour to 10 minutes if
20069 AvoidDiskWrites is set). Closes ticket 12485.
20071 o Minor features (hidden service):
20072 - Make Sybil attacks against hidden services harder by changing the
20073 minimum time required to get the HSDir flag from 25 hours up to 96
20074 hours. Addresses ticket 14149.
20075 - New option "HiddenServiceAllowUnknownPorts" to allow hidden
20076 services to disable the anti-scanning feature introduced in
20077 0.2.6.2-alpha. With this option not set, a connection to an
20078 unlisted port closes the circuit. With this option set, only a
20079 RELAY_DONE cell is sent. Closes ticket 14084.
20081 o Minor features (interface):
20082 - Implement "-f -" command-line option to read torrc configuration
20083 from standard input, if you don't want to store the torrc file in
20084 the file system. Implements feature 13865.
20086 o Minor features (logging):
20087 - Add a count of unique clients to the bridge heartbeat message.
20088 Resolves ticket 6852.
20089 - Suppress "router info incompatible with extra info" message when
20090 reading extrainfo documents from cache. (This message got loud
20091 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
20093 - Elevate hidden service authorized-client message from DEBUG to
20094 INFO. Closes ticket 14015.
20096 o Minor features (stability):
20097 - Add assertions in our hash-table iteration code to check for
20098 corrupted values that could cause infinite loops. Closes
20101 o Minor features (systemd):
20102 - Various improvements and modernizations in systemd hardening
20103 support. Closes ticket 13805. Patch from Craig Andrews.
20105 o Minor features (testing networks):
20106 - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
20107 and the default on a testing network to 2 minutes. Drop the
20108 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
20109 keep the default on a testing network at 30 seconds. This reduces
20110 HS bootstrap time to around 25 seconds. Also, change the default
20111 time in test-network.sh to match. Closes ticket 13401. Patch
20113 - Create TestingDirAuthVoteHSDir to correspond to
20114 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
20115 HSDir flag for the listed relays regardless of uptime or ORPort
20116 connectivity. Respects the value of VoteOnHidServDirectoriesV2.
20117 Partial implementation for ticket 14067. Patch by "teor".
20119 o Minor features (tor2web mode):
20120 - Introduce the config option Tor2webRendezvousPoints, which allows
20121 clients in Tor2webMode to select a specific Rendezvous Point to be
20122 used in HS circuits. This might allow better performance for
20123 Tor2Web nodes. Implements ticket 12844.
20125 o Minor bugfixes (client DNS):
20126 - Report the correct cached DNS expiration times on SOCKS port or in
20127 DNS replies. Previously, we would report everything as "never
20128 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
20129 - Avoid a small memory leak when we find a cached answer for a
20130 reverse DNS lookup in a client-side DNS cache. (Remember, client-
20131 side DNS caching is off by default, and is not recommended.) Fixes
20132 bug 14259; bugfix on 0.2.0.1-alpha.
20134 o Minor bugfixes (client, automapping):
20135 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
20136 no value follows the option. Fixes bug 14142; bugfix on
20137 0.2.4.7-alpha. Patch by "teor".
20138 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
20139 14195; bugfix on 0.1.0.1-rc.
20140 - Prevent changes to other options from removing the wildcard value
20141 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
20143 - Allow MapAddress and AutomapHostsOnResolve to work together when
20144 an address is mapped into another address type (like .onion) that
20145 must be automapped at resolve time. Fixes bug 7555; bugfix
20148 o Minor bugfixes (client, bridges):
20149 - When we are using bridges and we had a network connectivity
20150 problem, only retry connecting to our currently configured
20151 bridges, not all bridges we know about and remember using. Fixes
20152 bug 14216; bugfix on 0.2.2.17-alpha.
20154 o Minor bugfixes (client, IPv6):
20155 - Reject socks requests to literal IPv6 addresses when IPv6Traffic
20156 flag is not set; and not because the NoIPv4Traffic flag was set.
20157 Previously we'd looked at the NoIPv4Traffic flag for both types of
20158 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
20160 o Minor bugfixes (compilation):
20161 - The address of an array in the middle of a structure will always
20162 be non-NULL. clang recognises this and complains. Disable the
20163 tautologous and redundant check to silence this warning. Fixes bug
20164 14001; bugfix on 0.2.1.2-alpha.
20165 - Avoid warnings when building with systemd 209 or later. Fixes bug
20166 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
20167 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
20168 Addresses ticket 14188.
20169 - Build without warnings with the stock OpenSSL srtp.h header, which
20170 has a duplicate declaration of SSL_get_selected_srtp_profile().
20171 Fixes bug 14220; this is OpenSSL's bug, not ours.
20172 - Do not compile any code related to Tor2Web mode when Tor2Web mode
20173 is not enabled at compile time. Previously, this code was included
20174 in a disabled state. See discussion on ticket 12844.
20175 - Remove the --disable-threads configure option again. It was
20176 accidentally partially reintroduced in 29ac883606d6d. Fixes bug
20177 14819; bugfix on 0.2.6.2-alpha.
20179 o Minor bugfixes (controller):
20180 - Report "down" in response to the "GETINFO entry-guards" command
20181 when relays are down with an unreachable_since value. Previously,
20182 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
20183 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
20184 14116; bugfix on 0.2.2.9-alpha.
20185 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
20186 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
20188 o Minor bugfixes (directory authority):
20189 - Allow directory authorities to fetch more data from one another if
20190 they find themselves missing lots of votes. Previously, they had
20191 been bumping against the 10 MB queued data limit. Fixes bug 14261;
20192 bugfix on 0.1.2.5-alpha.
20193 - Do not attempt to download extrainfo documents which we will be
20194 unable to validate with a matching server descriptor. Fixes bug
20195 13762; bugfix on 0.2.0.1-alpha.
20196 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
20197 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
20198 - Enlarge the buffer to read bwauth generated files to avoid an
20199 issue when parsing the file in dirserv_read_measured_bandwidths().
20200 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
20202 o Minor bugfixes (file handling):
20203 - Stop failing when key files are zero-length. Instead, generate new
20204 keys, and overwrite the empty key files. Fixes bug 13111; bugfix
20205 on all versions of Tor. Patch by "teor".
20206 - Stop generating a fresh .old RSA onion key file when the .old file
20207 is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
20208 - Avoid overwriting .old key files with empty key files.
20209 - Skip loading zero-length extrainfo store, router store, stats,
20210 state, and key files.
20211 - Avoid crashing when trying to reload a torrc specified as a
20212 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
20215 o Minor bugfixes (hidden services):
20216 - Close the introduction circuit when we have no more usable intro
20217 points, instead of waiting for it to time out. This also ensures
20218 that no follow-up HS descriptor fetch is triggered when the
20219 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
20220 - When fetching a hidden service descriptor for a down service that
20221 was recently up, do not keep refetching until we try the same
20222 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
20223 - Successfully launch Tor with a nonexistent hidden service
20224 directory. Our fix for bug 13942 didn't catch this case. Fixes bug
20225 14106; bugfix on 0.2.6.2-alpha.
20227 o Minor bugfixes (logging):
20228 - Avoid crashing when there are more log domains than entries in
20229 domain_list. Bugfix on 0.2.3.1-alpha.
20230 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
20232 - Don't log messages to stdout twice when starting up. Fixes bug
20233 13993; bugfix on 0.2.6.1-alpha.
20235 o Minor bugfixes (parsing):
20236 - Stop accepting milliseconds (or other junk) at the end of
20237 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
20238 - Support two-number and three-number version numbers correctly, in
20239 case we change the Tor versioning system in the future. Fixes bug
20240 13661; bugfix on 0.0.8pre1.
20242 o Minor bugfixes (path counting):
20243 - When deciding whether the consensus lists any exit nodes, count
20244 the number listed in the consensus, not the number we have
20245 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
20246 - When deciding whether we have any exit nodes, only examine
20247 ExitNodes when the ExitNodes option is actually set. Fixes part of
20248 bug 14918; bugfix on 0.2.6.2-alpha.
20249 - Get rid of redundant and possibly scary warnings that we are
20250 missing directory information while we bootstrap. Fixes part of
20251 bug 14918; bugfix on 0.2.6.2-alpha.
20253 o Minor bugfixes (portability):
20254 - Fix the ioctl()-based network interface lookup code so that it
20255 will work on systems that have variable-length struct ifreq, for
20257 - Fix scheduler compilation on targets where char is unsigned. Fixes
20258 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
20260 o Minor bugfixes (sandbox):
20261 - Allow glibc fatal errors to be sent to stderr before Tor exits.
20262 Previously, glibc would try to write them to /dev/tty, and the
20263 sandbox would trap the call and make Tor exit prematurely. Fixes
20264 bug 14759; bugfix on 0.2.5.1-alpha.
20266 o Minor bugfixes (shutdown):
20267 - When shutting down, always call event_del() on lingering read or
20268 write events before freeing them. Otherwise, we risk double-frees
20269 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
20272 o Minor bugfixes (small memory leaks):
20273 - Avoid leaking memory when using IPv6 virtual address mappings.
20274 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
20277 o Minor bugfixes (statistics):
20278 - Increase period over which bandwidth observations are aggregated
20279 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
20281 o Minor bugfixes (systemd support):
20282 - Fix detection and operation of systemd watchdog. Fixes part of bug
20283 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
20284 - Run correctly under systemd with the RunAsDaemon option set. Fixes
20285 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
20286 - Inform the systemd supervisor about more changes in the Tor
20287 process status. Implements part of ticket 14141. Patch from
20289 - Cause the "--disable-systemd" option to actually disable systemd
20290 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
20293 o Minor bugfixes (TLS):
20294 - Check more thoroughly throughout the TLS code for possible
20295 unlogged TLS errors. Possible diagnostic or fix for bug 13319.
20297 o Minor bugfixes (transparent proxy):
20298 - Use getsockname, not getsockopt, to retrieve the address for a
20299 TPROXY-redirected connection. Fixes bug 13796; bugfix
20302 o Code simplification and refactoring:
20303 - Move fields related to isolating and configuring client ports into
20304 a shared structure. Previously, they were duplicated across
20305 port_cfg_t, listener_connection_t, and edge_connection_t. Failure
20306 to copy them correctly had been the cause of at least one bug in
20307 the past. Closes ticket 8546.
20308 - Refactor the get_interface_addresses_raw() doom-function into
20309 multiple smaller and simpler subfunctions. Cover the resulting
20310 subfunctions with unit-tests. Fixes a significant portion of
20312 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
20313 only for version <= 0.2.2.24 which is now deprecated. Closes
20315 - Remove a test for a long-defunct broken version-one
20319 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
20320 for writing the OpenBSD-specific tips. Resolves ticket 13702.
20321 - Make the tor-resolve documentation match its help string and its
20322 options. Resolves part of ticket 14325.
20323 - Log a more useful error message from tor-resolve when failing to
20324 look up a hidden service address. Resolves part of ticket 14325.
20326 o Downgraded warnings:
20327 - Don't warn when we've attempted to contact a relay using the wrong
20328 ntor onion key. Closes ticket 9635.
20330 o Removed features:
20331 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
20332 longer silently accepted as an alias for "ExitNodes".
20333 - The --enable-mempool and --enable-buf-freelists options, which
20334 were originally created to work around bad malloc implementations,
20335 no longer exist. They were off-by-default in 0.2.5. Closes
20339 - Make the checkdir/perms test complete successfully even if the
20340 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
20341 - Test that tor does not fail when key files are zero-length. Check
20342 that tor generates new keys, and overwrites the empty key files.
20343 - Test that tor generates new keys when keys are missing
20344 (existing behavior).
20345 - Test that tor does not overwrite key files that already contain
20346 data (existing behavior). Tests bug 13111. Patch by "teor".
20347 - New "make test-stem" target to run stem integration tests.
20348 Requires that the "STEM_SOURCE_DIR" environment variable be set.
20349 Closes ticket 14107.
20350 - Make the test_cmdline_args.py script work correctly on Windows.
20351 Patch from Gisle Vanem.
20352 - Move the slower unit tests into a new "./src/test/test-slow"
20353 binary that can be run independently of the other tests. Closes
20355 - Avoid undefined behavior when sampling huge values from the
20356 Laplace distribution. This made unittests fail on Raspberry Pi.
20357 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
20360 Changes in version 0.2.6.2-alpha - 2014-12-31
20361 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
20362 It introduces a major new backend for deciding when to send cells on
20363 channels, which should lead down the road to big performance
20364 increases. It contains security and statistics features for better
20365 work on hidden services, and numerous bugfixes.
20367 This release contains many new unit tests, along with major
20368 performance improvements for running testing networks using Chutney.
20369 Thanks to a series of patches contributed by "teor", testing networks
20370 should now bootstrap in seconds, rather than minutes.
20372 o Major features (relay, infrastructure):
20373 - Complete revision of the code that relays use to decide which cell
20374 to send next. Formerly, we selected the best circuit to write on
20375 each channel, but we didn't select among channels in any
20376 sophisticated way. Now, we choose the best circuits globally from
20377 among those whose channels are ready to deliver traffic.
20379 This patch implements a new inter-cmux comparison API, a global
20380 high/low watermark mechanism and a global scheduler loop for
20381 transmission prioritization across all channels as well as among
20382 circuits on one channel. This schedule is currently tuned to
20383 (tolerantly) avoid making changes in network performance, but it
20384 should form the basis for major circuit performance increases in
20385 the future. Code by Andrea; tuning by Rob Jansen; implements
20388 o Major features (hidden services):
20389 - Make HS port scanning more difficult by immediately closing the
20390 circuit when a user attempts to connect to a nonexistent port.
20391 Closes ticket 13667.
20392 - Add a HiddenServiceStatistics option that allows Tor relays to
20393 gather and publish statistics about the overall size and volume of
20394 hidden service usage. Specifically, when this option is turned on,
20395 an HSDir will publish an approximate number of hidden services
20396 that have published descriptors to it the past 24 hours. Also, if
20397 a relay has acted as a hidden service rendezvous point, it will
20398 publish the approximate amount of rendezvous cells it has relayed
20399 the past 24 hours. The statistics themselves are obfuscated so
20400 that the exact values cannot be derived. For more details see
20401 proposal 238, "Better hidden service stats from Tor relays". This
20402 feature is currently disabled by default. Implements feature 13192.
20404 o Major bugfixes (client, automap):
20405 - Repair automapping with IPv6 addresses. This automapping should
20406 have worked previously, but one piece of debugging code that we
20407 inserted to detect a regression actually caused the regression to
20408 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
20409 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
20412 o Major bugfixes (hidden services):
20413 - When closing an introduction circuit that was opened in parallel
20414 with others, don't mark the introduction point as unreachable.
20415 Previously, the first successful connection to an introduction
20416 point would make the other introduction points get marked as
20417 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
20419 o Directory authority changes:
20420 - Remove turtles as a directory authority.
20421 - Add longclaw as a new (v3) directory authority. This implements
20422 ticket 13296. This keeps the directory authority count at 9.
20424 o Major removed features:
20425 - Tor clients no longer support connecting to hidden services
20426 running on Tor 0.2.2.x and earlier; the Support022HiddenServices
20427 option has been removed. (There shouldn't be any hidden services
20428 running these versions on the network.) Closes ticket 7803.
20430 o Minor features (client):
20431 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
20432 is enabled, reject requests with IP addresses as hostnames.
20433 Resolves ticket 13315.
20435 o Minor features (controller):
20436 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
20437 write an unscheduled heartbeat message to the log. Implements
20440 o Minor features (geoip):
20441 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
20444 o Minor features (hidden services):
20445 - When re-enabling the network, don't try to build introduction
20446 circuits until we have successfully built a circuit. This makes
20447 hidden services come up faster when the network is re-enabled.
20448 Patch from "akwizgran". Closes ticket 13447.
20449 - When we fail to retrieve a hidden service descriptor, send the
20450 controller an "HS_DESC FAILED" controller event. Implements
20452 - New HiddenServiceDirGroupReadable option to cause hidden service
20453 directories and hostname files to be created group-readable. Patch
20454 from "anon", David Stainton, and "meejah". Closes ticket 11291.
20456 o Minor features (systemd):
20457 - Where supported, when running with systemd, report successful
20458 startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
20459 - When running with systemd, support systemd watchdog messages. Part
20460 of ticket 11016. Patch by Michael Scherer.
20462 o Minor features (transparent proxy):
20463 - Update the transparent proxy option checks to allow for both ipfw
20464 and pf on OS X. Closes ticket 14002.
20465 - Use the correct option when using IPv6 with transparent proxy
20466 support on Linux. Resolves 13808. Patch by Francisco Blas
20469 o Minor bugfixes (preventative security, C safety):
20470 - When reading a hexadecimal, base-32, or base-64 encoded value from
20471 a string, always overwrite the whole output buffer. This prevents
20472 some bugs where we would look at (but fortunately, not reveal)
20473 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
20475 - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
20476 just the part that's used. This makes it harder for data leak bugs
20477 to occur in the event of other programming failures. Resolves
20480 o Minor bugfixes (client, microdescriptors):
20481 - Use a full 256 bits of the SHA256 digest of a microdescriptor when
20482 computing which microdescriptors to download. This keeps us from
20483 erroneous download behavior if two microdescriptor digests ever
20484 have the same first 160 bits. Fixes part of bug 13399; bugfix
20486 - Reset a router's status if its microdescriptor digest changes,
20487 even if the first 160 bits remain the same. Fixes part of bug
20488 13399; bugfix on 0.2.3.1-alpha.
20490 o Minor bugfixes (compilation):
20491 - Silence clang warnings under --enable-expensive-hardening,
20492 including implicit truncation of 64 bit values to 32 bit, const
20493 char assignment to self, tautological compare, and additional
20494 parentheses around equality tests. Fixes bug 13577; bugfix
20496 - Fix a clang warning about checking whether an address in the
20497 middle of a structure is NULL. Fixes bug 14001; bugfix
20500 o Minor bugfixes (hidden services):
20501 - Correctly send a controller event when we find that a rendezvous
20502 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
20503 - Pre-check directory permissions for new hidden-services to avoid
20504 at least one case of "Bug: Acting on config options left us in a
20505 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
20506 - When adding a new hidden service (for example, via SETCONF), Tor
20507 no longer congratulates the user for running a relay. Fixes bug
20508 13941; bugfix on 0.2.6.1-alpha.
20509 - When fetching hidden service descriptors, we now check not only
20510 for whether we got the hidden service we had in mind, but also
20511 whether we got the particular descriptors we wanted. This prevents
20512 a class of inefficient but annoying DoS attacks by hidden service
20513 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
20516 o Minor bugfixes (Linux seccomp2 sandbox):
20517 - Make transparent proxy support work along with the seccomp2
20518 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
20519 by Francisco Blas Izquierdo Riera.
20520 - Fix a memory leak in tor-resolve when running with the sandbox
20521 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
20523 o Minor bugfixes (logging):
20524 - Downgrade warnings about RSA signature failures to info log level.
20525 Emit a warning when an extra info document is found incompatible
20526 with a corresponding router descriptor. Fixes bug 9812; bugfix
20528 - Make connection_ap_handshake_attach_circuit() log the circuit ID
20529 correctly. Fixes bug 13701; bugfix on 0.0.6.
20531 o Minor bugfixes (misc):
20532 - Stop allowing invalid address patterns like "*/24" that contain
20533 both a wildcard address and a bit prefix length. This affects all
20534 our address-range parsing code. Fixes bug 7484; bugfix
20537 o Minor bugfixes (testing networks, fast startup):
20538 - Allow Tor to build circuits using a consensus with no exits. If
20539 the consensus has no exits (typical of a bootstrapping test
20540 network), allow Tor to build circuits once enough descriptors have
20541 been downloaded. This assists in bootstrapping a testing Tor
20542 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
20544 - When V3AuthVotingInterval is low, give a lower If-Modified-Since
20545 header to directory servers. This allows us to obtain consensuses
20546 promptly when the consensus interval is very short. This assists
20547 in bootstrapping a testing Tor network. Fixes parts of bugs 13718
20548 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
20549 - Stop assuming that private addresses are local when checking
20550 reachability in a TestingTorNetwork. Instead, when testing, assume
20551 all OR connections are remote. (This is necessary due to many test
20552 scenarios running all relays on localhost.) This assists in
20553 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
20554 0.1.0.1-rc. Patch by "teor".
20555 - Avoid building exit circuits from a consensus with no exits. Now
20556 thanks to our fix for 13718, we accept a no-exit network as not
20557 wholly lost, but we need to remember not to try to build exit
20558 circuits on it. Closes ticket 13814; patch by "teor".
20559 - Stop requiring exits to have non-zero bandwithcapacity in a
20560 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
20561 ignore exit bandwidthcapacity. This assists in bootstrapping a
20562 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
20563 on 0.2.0.3-alpha. Patch by "teor".
20564 - Add "internal" to some bootstrap statuses when no exits are
20565 available. If the consensus does not contain Exits, Tor will only
20566 build internal circuits. In this case, relevant statuses will
20567 contain the word "internal" as indicated in the Tor control-
20568 spec.txt. When bootstrap completes, Tor will be ready to build
20569 internal circuits. If a future consensus contains Exits, exit
20570 circuits may become available. Fixes part of bug 13718; bugfix on
20571 0.2.4.10-alpha. Patch by "teor".
20572 - Decrease minimum consensus interval to 10 seconds when
20573 TestingTorNetwork is set, or 5 seconds for the first consensus.
20574 Fix assumptions throughout the code that assume larger intervals.
20575 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
20577 - Avoid excluding guards from path building in minimal test
20578 networks, when we're in a test network and excluding guards would
20579 exclude all relays. This typically occurs in incredibly small tor
20580 networks, and those using "TestingAuthVoteGuard *". Fixes part of
20581 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
20583 o Code simplification and refactoring:
20584 - Stop using can_complete_circuits as a global variable; access it
20585 with a function instead.
20586 - Avoid using operators directly as macro arguments: this lets us
20587 apply coccinelle transformations to our codebase more directly.
20588 Closes ticket 13172.
20589 - Combine the functions used to parse ClientTransportPlugin and
20590 ServerTransportPlugin into a single function. Closes ticket 6456.
20591 - Add inline functions and convenience macros for inspecting channel
20592 state. Refactor the code to use convenience macros instead of
20593 checking channel state directly. Fixes issue 7356.
20594 - Document all members of was_router_added_t and rename
20595 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
20596 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
20597 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
20598 constant instead of hardcoded value. Fixes issue 13840.
20599 - Refactor our generic strmap and digestmap types into a single
20600 implementation, so that we can add a new digest256map
20604 - Document the bridge-authority-only 'networkstatus-bridges' file.
20605 Closes ticket 13713; patch from "tom".
20606 - Fix typo in PredictedPortsRelevanceTime option description in
20607 manpage. Resolves issue 13707.
20608 - Stop suggesting that users specify relays by nickname: it isn't a
20609 good idea. Also, properly cross-reference how to specify relays in
20610 all parts of manual documenting options that take a list of
20611 relays. Closes ticket 13381.
20612 - Clarify the HiddenServiceDir option description in manpage to make
20613 it clear that relative paths are taken with respect to the current
20614 working directory. Also clarify that this behavior is not
20615 guaranteed to remain indefinitely. Fixes issue 13913.
20618 - New tests for many parts of channel, relay, and circuitmux
20619 functionality. Code by Andrea; part of 9262.
20620 - New tests for parse_transport_line(). Part of ticket 6456.
20621 - In the unit tests, use chgrp() to change the group of the unit
20622 test temporary directory to the current user, so that the sticky
20623 bit doesn't interfere with tests that check directory groups.
20625 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
20629 Changes in version 0.2.6.1-alpha - 2014-10-30
20630 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
20631 includes numerous code cleanups and new tests, and fixes a large
20632 number of annoying bugs. Out-of-memory conditions are handled better
20633 than in 0.2.5, pluggable transports have improved proxy support, and
20634 clients now use optimistic data for contacting hidden services. Also,
20635 we are now more robust to changes in what we consider a parseable
20636 directory object, so that tightening restrictions does not have a risk
20637 of introducing infinite download loops.
20639 This is the first alpha release in a new series, so expect there to be
20640 bugs. Users who would rather test out a more stable branch should stay
20641 with 0.2.5.x for now.
20643 o New compiler and system requirements:
20644 - Tor 0.2.6.x requires that your compiler support more of the C99
20645 language standard than before. The 'configure' script now detects
20646 whether your compiler supports C99 mid-block declarations and
20647 designated initializers. If it does not, Tor will not compile.
20649 We may revisit this requirement if it turns out that a significant
20650 number of people need to build Tor with compilers that don't
20651 bother implementing a 15-year-old standard. Closes ticket 13233.
20652 - Tor no longer supports systems without threading support. When we
20653 began working on Tor, there were several systems that didn't have
20654 threads, or where the thread support wasn't able to run the
20655 threads of a single process on multiple CPUs. That no longer
20656 holds: every system where Tor needs to run well now has threading
20657 support. Resolves ticket 12439.
20659 o Removed platform support:
20660 - We no longer include special code to build on Windows CE; as far
20661 as we know, nobody has used Tor on Windows CE in a very long time.
20662 Closes ticket 11446.
20664 o Major features (bridges):
20665 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
20666 transports if they are configured via the "TOR_PT_PROXY"
20667 environment variable. Implements proposal 232. Resolves
20670 o Major features (client performance, hidden services):
20671 - Allow clients to use optimistic data when connecting to a hidden
20672 service, which should remove a round-trip from hidden service
20673 initialization. See proposal 181 for details. Implements
20676 o Major features (directory system):
20677 - Upon receiving an unparseable directory object, if its digest
20678 matches what we expected, then don't try to download it again.
20679 Previously, when we got a descriptor we didn't like, we would keep
20680 trying to download it over and over. Closes ticket 11243.
20682 o Major features (sample torrc):
20683 - Add a new, infrequently-changed "torrc.minimal". This file is
20684 similar to torrc.sample, but it will change as infrequently as
20685 possible, for the benefit of users whose systems prompt them for
20686 intervention whenever a default configuration file is changed.
20687 Making this change allows us to update torrc.sample to be a more
20688 generally useful "sample torrc".
20690 o Major bugfixes (directory authorities):
20691 - Do not assign the HSDir flag to relays if they are not Valid, or
20692 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
20694 o Major bugfixes (directory bandwidth performance):
20695 - Don't flush the zlib buffer aggressively when compressing
20696 directory information for clients. This should save about 7% of
20697 the bandwidth currently used for compressed descriptors and
20698 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
20700 o Minor features (security, memory wiping):
20701 - Ensure we securely wipe keys from memory after
20702 crypto_digest_get_digest and init_curve25519_keypair_from_file
20703 have finished using them. Resolves ticket 13477.
20705 o Minor features (security, out-of-memory handling):
20706 - When handling an out-of-memory condition, allocate less memory for
20707 temporary data structures. Fixes issue 10115.
20708 - When handling an out-of-memory condition, consider more types of
20709 buffers, including those on directory connections, and zlib
20710 buffers. Resolves ticket 11792.
20713 - When identity keypair is generated for first time, log a
20714 congratulatory message that links to the new relay lifecycle
20715 document. Implements feature 10427.
20717 o Minor features (client):
20718 - Clients are now willing to send optimistic data (before they
20719 receive a 'connected' cell) to relays of any version. (Relays
20720 without support for optimistic data are no longer supported on the
20721 Tor network.) Resolves ticket 13153.
20723 o Minor features (directory authorities):
20724 - Don't list relays with a bandwidth estimate of 0 in the consensus.
20725 Implements a feature proposed during discussion of bug 13000.
20726 - In tor-gencert, report an error if the user provides the same
20727 argument more than once.
20728 - If a directory authority can't find a best consensus method in the
20729 votes that it holds, it now falls back to its favorite consensus
20730 method. Previously, it fell back to method 1. Neither of these is
20731 likely to get enough signatures, but "fall back to favorite"
20732 doesn't require us to maintain support an obsolete consensus
20733 method. Implements part of proposal 215.
20735 o Minor features (logging):
20736 - On Unix-like systems, you can now use named pipes as the target of
20737 the Log option, and other options that try to append to files.
20738 Closes ticket 12061. Patch from "carlo von lynX".
20739 - When opening a log file at startup, send it every log message that
20740 we generated between startup and opening it. Previously, log
20741 messages that were generated before opening the log file were only
20742 logged to stdout. Closes ticket 6938.
20743 - Add a TruncateLogFile option to overwrite logs instead of
20744 appending to them. Closes ticket 5583.
20746 o Minor features (portability, Solaris):
20747 - Threads are no longer disabled by default on Solaris; we believe
20748 that the versions of Solaris with broken threading support are all
20749 obsolete by now. Resolves ticket 9495.
20751 o Minor features (relay):
20752 - Re-check our address after we detect a changed IP address from
20753 getsockname(). This ensures that the controller command "GETINFO
20754 address" will report the correct value. Resolves ticket 11582.
20756 - A new AccountingRule option lets Relays set whether they'd like
20757 AccountingMax to be applied separately to inbound and outbound
20758 traffic, or applied to the sum of inbound and outbound traffic.
20759 Resolves ticket 961. Patch by "chobe".
20761 o Minor features (testing networks):
20762 - Add the TestingDirAuthVoteExit option, which lists nodes to assign
20763 the "Exit" flag regardless of their uptime, bandwidth, or exit
20764 policy. TestingTorNetwork must be set for this option to have any
20765 effect. Previously, authorities would take up to 35 minutes to
20766 give nodes the Exit flag in a test network. Partially implements
20769 o Minor features (validation):
20770 - Check all date/time values passed to tor_timegm and
20771 parse_rfc1123_time for validity, taking leap years into account.
20772 Improves HTTP header validation. Implemented with bug 13476.
20773 - In correct_tm(), limit the range of values returned by system
20774 localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
20775 This means we don't have to deal with negative or too large dates,
20776 even if a clock is wrong. Otherwise we might fail to read a file
20777 written by us which includes such a date. Fixes bug 13476.
20779 o Minor bugfixes (bridge clients):
20780 - When configured to use a bridge without an identity digest (not
20781 recommended), avoid launching an extra channel to it when
20782 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
20784 o Minor bugfixes (bridges):
20785 - When DisableNetwork is set, do not launch pluggable transport
20786 plugins, and if any are running, terminate them. Fixes bug 13213;
20787 bugfix on 0.2.3.6-alpha.
20789 o Minor bugfixes (C correctness):
20790 - Fix several instances of possible integer overflow/underflow/NaN.
20791 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
20793 - In circuit_build_times_calculate_timeout() in circuitstats.c,
20794 avoid dividing by zero in the pareto calculations. This traps
20795 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
20797 - Fix an integer overflow in format_time_interval(). Fixes bug
20798 13393; bugfix on 0.2.0.10-alpha.
20799 - Set the correct day of year value when the system's localtime(_r)
20800 or gmtime(_r) functions fail to set struct tm. Not externally
20801 visible. Fixes bug 13476; bugfix on 0.0.2pre14.
20802 - Avoid unlikely signed integer overflow in tor_timegm on systems
20803 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
20805 o Minor bugfixes (client):
20806 - Fix smartlist_choose_node_by_bandwidth() so that relays with the
20807 BadExit flag are not considered worthy candidates. Fixes bug
20808 13066; bugfix on 0.1.2.3-alpha.
20809 - Use the consensus schedule for downloading consensuses, and not
20810 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
20811 - Handle unsupported or malformed SOCKS5 requests properly by
20812 responding with the appropriate error message before closing the
20813 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
20815 o Minor bugfixes (client, torrc):
20816 - Stop modifying the value of our DirReqStatistics torrc option just
20817 because we're not a bridge or relay. This bug was causing Tor
20818 Browser users to write "DirReqStatistics 0" in their torrc files
20819 as if they had chosen to change the config. Fixes bug 4244; bugfix
20821 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
20822 that our options have changed every time we SIGHUP. Fixes bug
20823 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
20825 o Minor bugfixes (controller):
20826 - Return an error when the second or later arguments of the
20827 "setevents" controller command are invalid events. Previously we
20828 would return success while silently skipping invalid events. Fixes
20829 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
20831 o Minor bugfixes (directory system):
20832 - Always believe that v3 directory authorities serve extra-info
20833 documents, whether they advertise "caches-extra-info" or not.
20834 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
20835 - When running as a v3 directory authority, advertise that you serve
20836 extra-info documents so that clients who want them can find them
20837 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
20838 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
20839 Previously, directories offering BRIDGE_DIRINFO and some other
20840 flag (i.e. microdescriptors or extrainfo) would be ignored when
20841 looking for bridges. Partially fixes bug 13163; bugfix
20844 o Minor bugfixes (networking):
20845 - Check for orconns and use connection_or_close_for_error() rather
20846 than connection_mark_for_close() directly in the getsockopt()
20847 failure case of connection_handle_write_impl(). Fixes bug 11302;
20848 bugfix on 0.2.4.4-alpha.
20850 o Minor bugfixes (relay):
20851 - When generating our family list, remove spaces from around the
20852 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
20853 - If our previous bandwidth estimate was 0 bytes, allow publishing a
20854 new relay descriptor immediately. Fixes bug 13000; bugfix
20857 o Minor bugfixes (testing networks):
20858 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
20859 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
20860 - Stop using the default authorities in networks which provide both
20861 AlternateDirAuthority and AlternateBridgeAuthority. Partially
20862 fixes bug 13163; bugfix on 0.2.0.13-alpha.
20864 o Minor bugfixes (testing):
20865 - Stop spawn test failures due to a race condition between the
20866 SIGCHLD handler updating the process status, and the test reading
20867 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
20869 o Minor bugfixes (testing, Windows):
20870 - Avoid passing an extra backslash when creating a temporary
20871 directory for running the unit tests on Windows. Fixes bug 12392;
20872 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
20874 o Minor bugfixes (windows):
20875 - Remove code to special-case handling of NTE_BAD_KEYSET when
20876 acquiring windows CryptoAPI context. This error can't actually
20877 occur for the parameters we're providing. Fixes bug 10816; bugfix
20880 o Minor bugfixes (zlib):
20881 - Avoid truncating a zlib stream when trying to finalize it with an
20882 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
20885 - Allow our configure script to build correctly with autoconf 2.62
20886 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
20887 - Improve the error message from ./configure to make it clear that
20888 when asciidoc has not been found, the user will have to either add
20889 --disable-asciidoc argument or install asciidoc. Resolves
20892 o Code simplification and refactoring:
20893 - Change the entry_is_live() function to take named bitfield
20894 elements instead of an unnamed list of booleans. Closes
20896 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
20897 Resolves ticket 12205.
20898 - Use calloc and reallocarray functions instead of multiply-
20899 then-malloc. This makes it less likely for us to fall victim to an
20900 integer overflow attack when allocating. Resolves ticket 12855.
20901 - Use the standard macro name SIZE_MAX, instead of our
20903 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
20904 functions which take them as arguments. Replace 0 with NO_DIRINFO
20905 in a function call for clarity. Seeks to prevent future issues
20907 - Avoid 4 null pointer errors under clang static analysis by using
20908 tor_assert() to prove that the pointers aren't null. Fixes
20910 - Rework the API of policies_parse_exit_policy() to use a bitmask to
20911 represent parsing options, instead of a confusing mess of
20912 booleans. Resolves ticket 8197.
20913 - Introduce a helper function to parse ExitPolicy in
20914 or_options_t structure.
20917 - Add a doc/TUNING document with tips for handling large numbers of
20918 TCP connections when running busy Tor relay. Update the warning
20919 message to point to this file when running out of sockets
20920 operating system is allowing to use simultaneously. Resolves
20923 o Removed features:
20924 - We no longer remind the user about configuration options that have
20925 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
20926 - Remove our old, non-weighted bandwidth-based node selection code.
20927 Previously, we used it as a fallback when we couldn't perform
20928 weighted bandwidth-based node selection. But that would only
20929 happen in the cases where we had no consensus, or when we had a
20930 consensus generated by buggy or ancient directory authorities. In
20931 either case, it's better to use the more modern, better maintained
20932 algorithm, with reasonable defaults for the weights. Closes
20934 - Remove the --disable-curve25519 configure option. Relays and
20935 clients now are required to support curve25519 and the
20937 - The old "StrictEntryNodes" and "StrictExitNodes" options, which
20938 used to be deprecated synonyms for "StrictNodes", are now marked
20939 obsolete. Resolves ticket 12226.
20940 - Clients don't understand the BadDirectory flag in the consensus
20941 anymore, and ignore it.
20944 - Refactor the function that chooses guard nodes so that it can more
20945 easily be tested; write some tests for it.
20946 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
20947 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
20948 - Create unit tests for format_time_interval(). With bug 13393.
20949 - Add unit tests for tor_timegm signed overflow, tor_timegm and
20950 parse_rfc1123_time validity checks, correct_tm year clamping. Unit
20951 tests (visible) fixes in bug 13476.
20952 - Add a "coverage-html" make target to generate HTML-visualized
20953 coverage results when building with --enable-coverage. (Requires
20954 lcov.) Patch from Kevin Murray.
20955 - Enable the backtrace handler (where supported) when running the
20957 - Revise all unit tests that used the legacy test_* macros to
20958 instead use the recommended tt_* macros. This patch was generated
20959 with coccinelle, to avoid manual errors. Closes ticket 13119.
20961 o Distribution (systemd):
20962 - systemd unit file: only allow tor to write to /var/lib/tor and
20963 /var/log/tor. The rest of the filesystem is accessible for reading
20964 only. Patch by intrigeri; resolves ticket 12751.
20965 - systemd unit file: ensure that the process and all its children
20966 can never gain new privileges. Patch by intrigeri; resolves
20968 - systemd unit file: set up /var/run/tor as writable for the Tor
20969 service. Patch by intrigeri; resolves ticket 13196.
20971 o Removed features (directory authorities):
20972 - Remove code that prevented authorities from listing Tor relays
20973 affected by CVE-2011-2769 as guards. These relays are already
20974 rejected altogether due to the minimum version requirement of
20975 0.2.3.16-alpha. Closes ticket 13152.
20976 - The "AuthDirRejectUnlisted" option no longer has any effect, as
20977 the fingerprints file (approved-routers) has been deprecated.
20978 - Directory authorities do not support being Naming dirauths anymore.
20979 The "NamingAuthoritativeDir" config option is now obsolete.
20980 - Directory authorities do not support giving out the BadDirectory
20982 - Directory authorities no longer advertise or support consensus
20983 methods 1 through 12 inclusive. These consensus methods were
20984 obsolete and/or insecure: maintaining the ability to support them
20985 served no good purpose. Implements part of proposal 215; closes
20988 o Testing (test-network.sh):
20989 - Stop using "echo -n", as some shells' built-in echo doesn't
20990 support "-n". Instead, use "/bin/echo -n". Partially fixes
20992 - Stop an apparent test-network hang when used with make -j2. Fixes
20994 - Add a --delay option to test-network.sh, which configures the
20995 delay before the chutney network tests for data transmission.
20996 Partially implements ticket 13161.
20999 Changes in version 0.2.5.10 - 2014-10-24
21000 Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
21002 It adds several new security features, including improved
21003 denial-of-service resistance for relays, new compiler hardening
21004 options, and a system-call sandbox for hardened installations on Linux
21005 (requires seccomp2). The controller protocol has several new features,
21006 resolving IPv6 addresses should work better than before, and relays
21007 should be a little more CPU-efficient. We've added support for more
21008 OpenBSD and FreeBSD transparent proxy types. We've improved the build
21009 system and testing infrastructure to allow unit testing of more parts
21010 of the Tor codebase. Finally, we've addressed several nagging pluggable
21011 transport usability issues, and included numerous other small bugfixes
21012 and features mentioned below.
21014 This release marks end-of-life for Tor 0.2.3.x; those Tor versions
21015 have accumulated many known flaws; everyone should upgrade.
21017 o Deprecated versions:
21018 - Tor 0.2.3.x has reached end-of-life; it has received no patches or
21019 attention for some while.
21022 Changes in version 0.2.5.9-rc - 2014-10-20
21023 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
21024 series. It disables SSL3 in response to the recent "POODLE" attack
21025 (even though POODLE does not affect Tor). It also works around a crash
21026 bug caused by some operating systems' response to the "POODLE" attack
21027 (which does affect Tor). It also contains a few miscellaneous fixes.
21029 o Major security fixes:
21030 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
21031 today support TLS 1.0 or later, so we can safely turn off support
21032 for this old (and insecure) protocol. Fixes bug 13426.
21034 o Major bugfixes (openssl bug workaround):
21035 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
21036 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
21037 13471. This is a workaround for an OpenSSL bug.
21040 - Disable the sandbox name resolver cache when running tor-resolve:
21041 tor-resolve doesn't use the sandbox code, and turning it on was
21042 breaking attempts to do tor-resolve on a non-default server on
21043 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
21045 o Compilation fixes:
21046 - Build and run correctly on systems like OpenBSD-current that have
21047 patched OpenSSL to remove get_cipher_by_char and/or its
21048 implementations. Fixes issue 13325.
21050 o Downgraded warnings:
21051 - Downgrade the severity of the 'unexpected sendme cell from client'
21052 from 'warn' to 'protocol warning'. Closes ticket 8093.
21055 Changes in version 0.2.4.25 - 2014-10-20
21056 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
21057 (even though POODLE does not affect Tor). It also works around a crash
21058 bug caused by some operating systems' response to the "POODLE" attack
21059 (which does affect Tor).
21061 o Major security fixes (also in 0.2.5.9-rc):
21062 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
21063 today support TLS 1.0 or later, so we can safely turn off support
21064 for this old (and insecure) protocol. Fixes bug 13426.
21066 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
21067 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
21068 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
21069 13471. This is a workaround for an OpenSSL bug.
21072 Changes in version 0.2.5.8-rc - 2014-09-22
21073 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
21074 series. It fixes a bug that affects consistency and speed when
21075 connecting to hidden services, and it updates the location of one of
21076 the directory authorities.
21079 - Clients now send the correct address for their chosen rendezvous
21080 point when trying to access a hidden service. They used to send
21081 the wrong address, which would still work some of the time because
21082 they also sent the identity digest of the rendezvous point, and if
21083 the hidden service happened to try connecting to the rendezvous
21084 point from a relay that already had a connection open to it,
21085 the relay would reuse that connection. Now connections to hidden
21086 services should be more robust and faster. Also, this bug meant
21087 that clients were leaking to the hidden service whether they were
21088 on a little-endian (common) or big-endian (rare) system, which for
21089 some users might have reduced their anonymity. Fixes bug 13151;
21090 bugfix on 0.2.1.5-alpha.
21092 o Directory authority changes:
21093 - Change IP address for gabelmoo (v3 directory authority).
21096 Changes in version 0.2.4.24 - 2014-09-22
21097 Tor 0.2.4.24 fixes a bug that affects consistency and speed when
21098 connecting to hidden services, and it updates the location of one of
21099 the directory authorities.
21102 - Clients now send the correct address for their chosen rendezvous
21103 point when trying to access a hidden service. They used to send
21104 the wrong address, which would still work some of the time because
21105 they also sent the identity digest of the rendezvous point, and if
21106 the hidden service happened to try connecting to the rendezvous
21107 point from a relay that already had a connection open to it,
21108 the relay would reuse that connection. Now connections to hidden
21109 services should be more robust and faster. Also, this bug meant
21110 that clients were leaking to the hidden service whether they were
21111 on a little-endian (common) or big-endian (rare) system, which for
21112 some users might have reduced their anonymity. Fixes bug 13151;
21113 bugfix on 0.2.1.5-alpha.
21115 o Directory authority changes:
21116 - Change IP address for gabelmoo (v3 directory authority).
21118 o Minor features (geoip):
21119 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
21123 Changes in version 0.2.5.7-rc - 2014-09-11
21124 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
21125 release series, and some long-standing bugs related to ORPort reachability
21126 testing and failure to send CREATE cells. It is the first release
21127 candidate for the Tor 0.2.5.x series.
21129 o Major bugfixes (client, startup):
21130 - Start making circuits as soon as DisabledNetwork is turned off.
21131 When Tor started with DisabledNetwork set, it would correctly
21132 conclude that it shouldn't build circuits, but it would mistakenly
21133 cache this conclusion, and continue believing it even when
21134 DisableNetwork is set to 0. Fixes the bug introduced by the fix
21135 for bug 11200; bugfix on 0.2.5.4-alpha.
21136 - Resume expanding abbreviations for command-line options. The fix
21137 for bug 4647 accidentally removed our hack from bug 586 that
21138 rewrote HashedControlPassword to __HashedControlSessionPassword
21139 when it appears on the commandline (which allowed the user to set
21140 her own HashedControlPassword in the torrc file while the
21141 controller generates a fresh session password for each run). Fixes
21142 bug 12948; bugfix on 0.2.5.1-alpha.
21143 - Warn about attempts to run hidden services and relays in the same
21144 process: that's probably not a good idea. Closes ticket 12908.
21146 o Major bugfixes (relay):
21147 - Avoid queuing or sending destroy cells for circuit ID zero when we
21148 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
21149 Found and fixed by "cypherpunks".
21150 - Fix ORPort reachability detection on relays running behind a
21151 proxy, by correctly updating the "local" mark on the controlling
21152 channel when changing the address of an or_connection_t after the
21153 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
21155 o Minor features (bridge):
21156 - Add an ExtORPortCookieAuthFileGroupReadable option to make the
21157 cookie file for the ExtORPort g+r by default.
21159 o Minor features (geoip):
21160 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
21163 o Minor bugfixes (logging):
21164 - Reduce the log severity of the "Pluggable transport proxy does not
21165 provide any needed transports and will not be launched." message,
21166 since Tor Browser includes several ClientTransportPlugin lines in
21167 its torrc-defaults file, leading every Tor Browser user who looks
21168 at her logs to see these notices and wonder if they're dangerous.
21169 Resolves bug 13124; bugfix on 0.2.5.3-alpha.
21170 - Downgrade "Unexpected onionskin length after decryption" warning
21171 to a protocol-warn, since there's nothing relay operators can do
21172 about a client that sends them a malformed create cell. Resolves
21173 bug 12996; bugfix on 0.0.6rc1.
21174 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
21175 cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
21176 - When logging information about an EXTEND2 or EXTENDED2 cell, log
21177 their names correctly. Fixes part of bug 12700; bugfix
21179 - When logging information about a relay cell whose command we don't
21180 recognize, log its command as an integer. Fixes part of bug 12700;
21181 bugfix on 0.2.1.10-alpha.
21182 - Escape all strings from the directory connection before logging
21183 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
21185 o Minor bugfixes (controller):
21186 - Restore the functionality of CookieAuthFileGroupReadable. Fixes
21187 bug 12864; bugfix on 0.2.5.1-alpha.
21188 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
21189 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
21192 o Minor bugfixes (compilation):
21193 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
21194 bugfix on 0.2.5.5-alpha.
21195 - Make the nmake make files work again. Fixes bug 13081. Bugfix on
21196 0.2.5.1-alpha. Patch from "NewEraCracker".
21197 - In routerlist_assert_ok(), don't take the address of a
21198 routerinfo's cache_info member unless that routerinfo is non-NULL.
21199 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
21200 - Fix a large number of false positive warnings from the clang
21201 analyzer static analysis tool. This should make real warnings
21202 easier for clang analyzer to find. Patch from "teor". Closes
21205 o Distribution (systemd):
21206 - Verify configuration file via ExecStartPre in the systemd unit
21207 file. Patch from intrigeri; resolves ticket 12730.
21208 - Explicitly disable RunAsDaemon in the systemd unit file. Our
21209 current systemd unit uses "Type = simple", so systemd does not
21210 expect tor to fork. If the user has "RunAsDaemon 1" in their
21211 torrc, then things won't work as expected. This is e.g. the case
21212 on Debian (and derivatives), since there we pass "--defaults-torrc
21213 /usr/share/tor/tor-service-defaults-torrc" (that contains
21214 "RunAsDaemon 1") by default. Patch by intrigeri; resolves
21218 - Adjust the URLs in the README to refer to the new locations of
21219 several documents on the website. Fixes bug 12830. Patch from
21221 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
21225 Changes in version 0.2.5.6-alpha - 2014-07-28
21226 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
21227 risk from guard rotation, and fixes a variety of other issues to get
21228 us closer to a release candidate.
21230 o Major features (also in 0.2.4.23):
21231 - Make the number of entry guards configurable via a new
21232 NumEntryGuards consensus parameter, and the number of directory
21233 guards configurable via a new NumDirectoryGuards consensus
21234 parameter. Implements ticket 12688.
21236 o Major bugfixes (also in 0.2.4.23):
21237 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
21238 implementation that caused incorrect results on 32-bit
21239 implementations when certain malformed inputs were used along with
21240 a small class of private ntor keys. This bug does not currently
21241 appear to allow an attacker to learn private keys or impersonate a
21242 Tor server, but it could provide a means to distinguish 32-bit Tor
21243 implementations from 64-bit Tor implementations. Fixes bug 12694;
21244 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
21248 - Perform circuit cleanup operations even when circuit
21249 construction operations are disabled (because the network is
21250 disabled, or because there isn't enough directory information).
21251 Previously, when we were not building predictive circuits, we
21252 were not closing expired circuits either. Fixes bug 8387; bugfix on
21253 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
21254 became more strict about when we have "enough directory information
21255 to build circuits".
21258 - Authorities now assign the Guard flag to the fastest 25% of the
21259 network (it used to be the fastest 50%). Also raise the consensus
21260 weight that guarantees the Guard flag from 250 to 2000. For the
21261 current network, this results in about 1100 guards, down from 2500.
21262 This step paves the way for moving the number of entry guards
21263 down to 1 (proposal 236) while still providing reasonable expected
21264 performance for most users. Implements ticket 12690.
21265 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
21267 - Slightly enhance the diagnostic message for bug 12184.
21269 o Minor bugfixes (also in 0.2.4.23):
21270 - Warn and drop the circuit if we receive an inbound 'relay early'
21271 cell. Those used to be normal to receive on hidden service circuits
21272 due to bug 1038, but the buggy Tor versions are long gone from
21273 the network so we can afford to resume watching for them. Resolves
21274 the rest of bug 1038; bugfix on 0.2.1.19.
21275 - Correct a confusing error message when trying to extend a circuit
21276 via the control protocol but we don't know a descriptor or
21277 microdescriptor for one of the specified relays. Fixes bug 12718;
21278 bugfix on 0.2.3.1-alpha.
21281 - Fix compilation when building with bufferevents enabled. (This
21282 configuration is still not expected to work, however.)
21283 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
21284 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
21286 - Compile correctly with builds and forks of OpenSSL (such as
21287 LibreSSL) that disable compression. Fixes bug 12602; bugfix on
21288 0.2.1.1-alpha. Patch from "dhill".
21291 Changes in version 0.2.4.23 - 2014-07-28
21292 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
21293 guard rotation, and also backports several important fixes from the
21294 Tor 0.2.5 alpha release series.
21297 - Clients now look at the "usecreatefast" consensus parameter to
21298 decide whether to use CREATE_FAST or CREATE cells for the first hop
21299 of their circuit. This approach can improve security on connections
21300 where Tor's circuit handshake is stronger than the available TLS
21301 connection security levels, but the tradeoff is more computational
21302 load on guard relays. Implements proposal 221. Resolves ticket 9386.
21303 - Make the number of entry guards configurable via a new
21304 NumEntryGuards consensus parameter, and the number of directory
21305 guards configurable via a new NumDirectoryGuards consensus
21306 parameter. Implements ticket 12688.
21309 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
21310 implementation that caused incorrect results on 32-bit
21311 implementations when certain malformed inputs were used along with
21312 a small class of private ntor keys. This bug does not currently
21313 appear to allow an attacker to learn private keys or impersonate a
21314 Tor server, but it could provide a means to distinguish 32-bit Tor
21315 implementations from 64-bit Tor implementations. Fixes bug 12694;
21316 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
21320 - Warn and drop the circuit if we receive an inbound 'relay early'
21321 cell. Those used to be normal to receive on hidden service circuits
21322 due to bug 1038, but the buggy Tor versions are long gone from
21323 the network so we can afford to resume watching for them. Resolves
21324 the rest of bug 1038; bugfix on 0.2.1.19.
21325 - Correct a confusing error message when trying to extend a circuit
21326 via the control protocol but we don't know a descriptor or
21327 microdescriptor for one of the specified relays. Fixes bug 12718;
21328 bugfix on 0.2.3.1-alpha.
21329 - Avoid an illegal read from stack when initializing the TLS
21330 module using a version of OpenSSL without all of the ciphers
21331 used by the v2 link handshake. Fixes bug 12227; bugfix on
21332 0.2.4.8-alpha. Found by "starlight".
21335 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
21339 Changes in version 0.2.5.5-alpha - 2014-06-18
21340 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
21341 0.2.5.x release series, including a couple of DoS issues, some
21342 performance regressions, a large number of bugs affecting the Linux
21343 seccomp2 sandbox code, and various other bugfixes. It also adds
21344 diagnostic bugfixes for a few tricky issues that we're trying to
21347 o Major features (security, traffic analysis resistance):
21348 - Several major improvements to the algorithm used to decide when to
21349 close TLS connections. Previous versions of Tor closed connections
21350 at a fixed interval after the last time a non-padding cell was
21351 sent over the connection, regardless of the target of the
21352 connection. Now, we randomize the intervals by adding up to 50% of
21353 their base value, we measure the length of time since connection
21354 last had at least one circuit, and we allow connections to known
21355 ORs to remain open a little longer (15 minutes instead of 3
21356 minutes minimum). These changes should improve Tor's resistance
21357 against some kinds of traffic analysis, and lower some overhead
21358 from needlessly closed connections. Fixes ticket 6799.
21359 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
21361 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
21362 - Fix a memory leak that could occur if a microdescriptor parse
21363 fails during the tokenizing step. This bug could enable a memory
21364 exhaustion attack by directory servers. Fixes bug 11649; bugfix
21367 o Major bugfixes (security, directory authorities):
21368 - Directory authorities now include a digest of each relay's
21369 identity key as a part of its microdescriptor.
21371 This is a workaround for bug 11743 (reported by "cypherpunks"),
21372 where Tor clients do not support receiving multiple
21373 microdescriptors with the same SHA256 digest in the same
21374 consensus. When clients receive a consensus like this, they only
21375 use one of the relays. Without this fix, a hostile relay could
21376 selectively disable some client use of target relays by
21377 constructing a router descriptor with a different identity and the
21378 same microdescriptor parameters and getting the authorities to
21379 list it in a microdescriptor consensus. This fix prevents an
21380 attacker from causing a microdescriptor collision, because the
21381 router's identity is not forgeable.
21383 o Major bugfixes (relay):
21384 - Use a direct dirport connection when uploading non-anonymous
21385 descriptors to the directory authorities. Previously, relays would
21386 incorrectly use tunnel connections under a fairly wide variety of
21387 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
21388 - When a circuit accidentally has the same circuit ID for its
21389 forward and reverse direction, correctly detect the direction of
21390 cells using that circuit. Previously, this bug made roughly one
21391 circuit in a million non-functional. Fixes bug 12195; this is a
21392 bugfix on every version of Tor.
21394 o Major bugfixes (client, pluggable transports):
21395 - When managing pluggable transports, use OS notification facilities
21396 to learn if they have crashed, and don't attempt to kill any
21397 process that has already exited. Fixes bug 8746; bugfix
21400 o Minor features (diagnostic):
21401 - When logging a warning because of bug 7164, additionally check the
21402 hash table for consistency (as proposed on ticket 11737). This may
21403 help diagnose bug 7164.
21404 - When we log a heartbeat, log how many one-hop circuits we have
21405 that are at least 30 minutes old, and log status information about
21406 a few of them. This is an attempt to track down bug 8387.
21407 - When encountering an unexpected CR while writing text to a file on
21408 Windows, log the name of the file. Should help diagnosing
21410 - Give more specific warnings when a client notices that an onion
21411 handshake has failed. Fixes ticket 9635.
21412 - Add significant new logging code to attempt to diagnose bug 12184,
21413 where relays seem to run out of available circuit IDs.
21414 - Improve the diagnostic log message for bug 8387 even further to
21415 try to improve our odds of figuring out why one-hop directory
21416 circuits sometimes do not get closed.
21418 o Minor features (security, memory management):
21419 - Memory allocation tricks (mempools and buffer freelists) are now
21420 disabled by default. You can turn them back on with
21421 --enable-mempools and --enable-buf-freelists respectively. We're
21422 disabling these features because malloc performance is good enough
21423 on most platforms, and a similar feature in OpenSSL exacerbated
21424 exploitation of the Heartbleed attack. Resolves ticket 11476.
21426 o Minor features (security):
21427 - Apply the secure SipHash-2-4 function to the hash table mapping
21428 circuit IDs and channels to circuits. We missed this one when we
21429 were converting all the other hash functions to use SipHash back
21430 in 0.2.5.3-alpha. Resolves ticket 11750.
21432 o Minor features (build):
21433 - The configure script has a --disable-seccomp option to turn off
21434 support for libseccomp on systems that have it, in case it (or
21435 Tor's use of it) is broken. Resolves ticket 11628.
21437 o Minor features (other):
21438 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
21441 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
21442 - When running a hidden service, do not allow TunneledDirConns 0;
21443 this will keep the hidden service from running, and also
21444 make it publish its descriptors directly over HTTP. Fixes bug 10849;
21445 bugfix on 0.2.1.1-alpha.
21447 o Minor bugfixes (performance):
21448 - Avoid a bug where every successful connection made us recompute
21449 the flag telling us whether we have sufficient information to
21450 build circuits. Previously, we would forget our cached value
21451 whenever we successfully opened a channel (or marked a router as
21452 running or not running for any other reason), regardless of
21453 whether we had previously believed the router to be running. This
21454 forced us to run an expensive update operation far too often.
21455 Fixes bug 12170; bugfix on 0.1.2.1-alpha.
21456 - Avoid using tor_memeq() for checking relay cell integrity. This
21457 removes a possible performance bottleneck. Fixes part of bug
21458 12169; bugfix on 0.2.1.31.
21460 o Minor bugfixes (compilation):
21461 - Fix compilation of test_status.c when building with MVSC. Bugfix
21462 on 0.2.5.4-alpha. Patch from Gisle Vanem.
21463 - Resolve GCC complaints on OpenBSD about discarding constness in
21464 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
21465 on 0.1.1.23. Patch from Dana Koch.
21466 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
21467 treatment of long and time_t as comparable types. Fixes part of
21468 bug 11633. Patch from Dana Koch.
21469 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
21470 11623; bugfix on 0.2.5.3-alpha.
21471 - When deciding whether to build the 64-bit curve25519
21472 implementation, detect platforms where we can compile 128-bit
21473 arithmetic but cannot link it. Fixes bug 11729; bugfix on
21474 0.2.4.8-alpha. Patch from "conradev".
21475 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
21476 bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
21477 - Fix compilation with dmalloc. Fixes bug 11605; bugfix
21480 o Minor bugfixes (Directory server):
21481 - When sending a compressed set of descriptors or microdescriptors,
21482 make sure to finalize the zlib stream. Previously, we would write
21483 all the compressed data, but if the last descriptor we wanted to
21484 send was missing or too old, we would not mark the stream as
21485 finished. This caused problems for decompression tools. Fixes bug
21486 11648; bugfix on 0.1.1.23.
21488 o Minor bugfixes (Linux seccomp sandbox):
21489 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
21490 11622; bugfix on 0.2.5.1-alpha.
21491 - Avoid crashing when re-opening listener ports with the seccomp
21492 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
21493 - Avoid crashing with the seccomp sandbox enabled along with
21494 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
21495 - When we receive a SIGHUP with the sandbox enabled, correctly
21496 support rotating our log files. Fixes bug 12032; bugfix
21498 - Avoid crash when running with sandboxing enabled and
21499 DirReqStatistics not disabled. Fixes bug 12035; bugfix
21501 - Fix a "BUG" warning when trying to write bridge-stats files with
21502 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
21504 - Prevent the sandbox from crashing on startup when run with the
21505 --enable-expensive-hardening configuration option. Fixes bug
21506 11477; bugfix on 0.2.5.4-alpha.
21507 - When running with DirPortFrontPage and sandboxing both enabled,
21508 reload the DirPortFrontPage correctly when restarting. Fixes bug
21509 12028; bugfix on 0.2.5.1-alpha.
21510 - Don't try to enable the sandbox when using the Tor binary to check
21511 its configuration, hash a passphrase, or so on. Doing so was
21512 crashing on startup for some users. Fixes bug 11609; bugfix
21514 - Avoid warnings when running with sandboxing and node statistics
21515 enabled at the same time. Fixes part of 12064; bugfix on
21516 0.2.5.1-alpha. Patch from Michael Wolf.
21517 - Avoid warnings when running with sandboxing enabled at the same
21518 time as cookie authentication, hidden services, or directory
21519 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
21520 - Do not allow options that require calls to exec to be enabled
21521 alongside the seccomp2 sandbox: they will inevitably crash. Fixes
21522 bug 12043; bugfix on 0.2.5.1-alpha.
21523 - Handle failures in getpwnam()/getpwuid() when running with the
21524 User option set and the Linux syscall sandbox enabled. Fixes bug
21525 11946; bugfix on 0.2.5.1-alpha.
21526 - Refactor the getaddrinfo workaround that the seccomp sandbox uses
21527 to avoid calling getaddrinfo() after installing the sandbox
21528 filters. Previously, it preloaded a cache with the IPv4 address
21529 for our hostname, and nothing else. Now, it loads the cache with
21530 every address that it used to initialize the Tor process. Fixes
21531 bug 11970; bugfix on 0.2.5.1-alpha.
21533 o Minor bugfixes (pluggable transports):
21534 - Enable the ExtORPortCookieAuthFile option, to allow changing the
21535 default location of the authentication token for the extended OR
21536 Port as used by sever-side pluggable transports. We had
21537 implemented this option before, but the code to make it settable
21538 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
21539 - Avoid another 60-second delay when starting Tor in a pluggable-
21540 transport-using configuration when we already have cached
21541 descriptors for our bridges. Fixes bug 11965; bugfix
21544 o Minor bugfixes (client):
21545 - Avoid "Tried to open a socket with DisableNetwork set" warnings
21546 when starting a client with bridges configured and DisableNetwork
21547 set. (Tor launcher starts Tor with DisableNetwork set the first
21548 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
21550 o Minor bugfixes (testing):
21551 - The Python parts of the test scripts now work on Python 3 as well
21552 as Python 2, so systems where '/usr/bin/python' is Python 3 will
21553 no longer have the tests break. Fixes bug 11608; bugfix
21555 - When looking for versions of python that we could run the tests
21556 with, check for "python2.7" and "python3.3"; previously we were
21557 only looking for "python", "python2", and "python3". Patch from
21558 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
21559 - Fix all valgrind warnings produced by the unit tests. There were
21560 over a thousand memory leak warnings previously, mostly produced
21561 by forgetting to free things in the unit test code. Fixes bug
21562 11618, bugfixes on many versions of Tor.
21564 o Minor bugfixes (tor-fw-helper):
21565 - Give a correct log message when tor-fw-helper fails to launch.
21566 (Previously, we would say something like "tor-fw-helper sent us a
21567 string we could not parse".) Fixes bug 9781; bugfix
21570 o Minor bugfixes (relay, threading):
21571 - Check return code on spawn_func() in cpuworker code, so that we
21572 don't think we've spawned a nonworking cpuworker and write junk to
21573 it forever. Fix related to bug 4345; bugfix on all released Tor
21574 versions. Found by "skruffy".
21575 - Use a pthread_attr to make sure that spawn_func() cannot return an
21576 error while at the same time launching a thread. Fix related to
21577 bug 4345; bugfix on all released Tor versions. Reported
21580 o Minor bugfixes (relay, oom prevention):
21581 - Correctly detect the total available system memory. We tried to do
21582 this in 0.2.5.4-alpha, but the code was set up to always return an
21583 error value, even on success. Fixes bug 11805; bugfix
21586 o Minor bugfixes (relay, other):
21587 - We now drop CREATE cells for already-existent circuit IDs and for
21588 zero-valued circuit IDs, regardless of other factors that might
21589 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
21591 - Avoid an illegal read from stack when initializing the TLS module
21592 using a version of OpenSSL without all of the ciphers used by the
21593 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
21595 - When rejecting DATA cells for stream_id zero, still count them
21596 against the circuit's deliver window so that we don't fail to send
21597 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
21599 o Minor bugfixes (logging):
21600 - Fix a misformatted log message about delayed directory fetches.
21601 Fixes bug 11654; bugfix on 0.2.5.3-alpha.
21602 - Squelch a spurious LD_BUG message "No origin circuit for
21603 successful SOCKS stream" in certain hidden service failure cases;
21607 - Include a tor.service file in contrib/dist for use with systemd.
21608 Some distributions will be able to use this file unmodified;
21609 others will need to tweak it, or write their own. Patch from Jamie
21610 Nguyen; resolves ticket 8368.
21613 - Clean up several option names in the manpage to match their real
21614 names, add the missing documentation for a couple of testing and
21615 directory authority options, remove the documentation for a
21616 V2-directory fetching option that no longer exists. Resolves
21618 - Correct the documentation so that it lists the correct directory
21619 for the stats files. (They are in a subdirectory called "stats",
21621 - In the manpage, move more authority-only options into the
21622 directory authority section so that operators of regular directory
21623 caches don't get confused.
21626 - The contrib directory has been sorted and tidied. Before, it was
21627 an unsorted dumping ground for useful and not-so-useful things.
21628 Now, it is divided based on functionality, and the items which
21629 seemed to be nonfunctional or useless have been removed. Resolves
21630 ticket 8966; based on patches from "rl1987".
21633 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
21634 and MTBF calculations, but that nobody was using. Fixes ticket 11742.
21635 - The TunnelDirConns and PreferTunnelledDirConns options no longer
21636 exist; tunneled directory connections have been available since
21637 0.1.2.5-alpha, and turning them off is not a good idea. This is a
21638 brute-force fix for 10849, where "TunnelDirConns 0" would break
21642 Changes in version 0.2.4.22 - 2014-05-16
21643 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
21644 alpha release series. These include blocking all authority signing
21645 keys that may have been affected by the OpenSSL "heartbleed" bug,
21646 choosing a far more secure set of TLS ciphersuites by default, closing
21647 a couple of memory leaks that could be used to run a target relay out
21648 of RAM, and several others.
21650 o Major features (security, backport from 0.2.5.4-alpha):
21651 - Block authority signing keys that were used on authorities
21652 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
21653 don't have any evidence that these keys _were_ compromised; we're
21654 doing this to be prudent.) Resolves ticket 11464.
21656 o Major bugfixes (security, OOM):
21657 - Fix a memory leak that could occur if a microdescriptor parse
21658 fails during the tokenizing step. This bug could enable a memory
21659 exhaustion attack by directory servers. Fixes bug 11649; bugfix
21662 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
21663 - The relay ciphersuite list is now generated automatically based on
21664 uniform criteria, and includes all OpenSSL ciphersuites with
21665 acceptable strength and forward secrecy. Previously, we had left
21666 some perfectly fine ciphersuites unsupported due to omission or
21667 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
21668 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
21669 - Relays now trust themselves to have a better view than clients of
21670 which TLS ciphersuites are better than others. (Thanks to bug
21671 11513, the relay list is now well-considered, whereas the client
21672 list has been chosen mainly for anti-fingerprinting purposes.)
21673 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
21674 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
21675 AES128. Resolves ticket 11528.
21676 - Clients now try to advertise the same list of ciphersuites as
21677 Firefox 28. This change enables selection of (fast) GCM
21678 ciphersuites, disables some strange old ciphers, and stops
21679 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
21680 Resolves ticket 11438.
21682 o Minor bugfixes (configuration, security):
21683 - When running a hidden service, do not allow TunneledDirConns 0:
21684 trying to set that option together with a hidden service would
21685 otherwise prevent the hidden service from running, and also make
21686 it publish its descriptors directly over HTTP. Fixes bug 10849;
21687 bugfix on 0.2.1.1-alpha.
21689 o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
21690 - Avoid sending a garbage value to the controller when a circuit is
21691 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
21693 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
21694 - Stop leaking memory when we successfully resolve a PTR record.
21695 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
21697 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
21698 - Avoid 60-second delays in the bootstrapping process when Tor is
21699 launching for a second time while using bridges. Fixes bug 9229;
21700 bugfix on 0.2.0.3-alpha.
21702 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
21703 - Give the correct URL in the warning message when trying to run a
21704 relay on an ancient version of Windows. Fixes bug 9393.
21706 o Minor bugfixes (compilation):
21707 - Fix a compilation error when compiling with --disable-curve25519.
21708 Fixes bug 9700; bugfix on 0.2.4.17-rc.
21711 - Downgrade the warning severity for the the "md was still
21712 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
21713 for trying to diagnose this bug, and the current warning in
21714 earlier versions of tor achieves nothing useful. Addresses warning
21717 o Minor features (log verbosity, backport from 0.2.5.4-alpha):
21718 - When we run out of usable circuit IDs on a channel, log only one
21719 warning for the whole channel, and describe how many circuits
21720 there were on the channel. Fixes part of ticket 11553.
21722 o Minor features (security, backport from 0.2.5.4-alpha):
21723 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
21724 leave the default at 8GBytes), to better support Raspberry Pi
21725 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
21727 o Documentation (backport from 0.2.5.4-alpha):
21728 - Correctly document that we search for a system torrc file before
21729 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
21733 Changes in version 0.2.5.4-alpha - 2014-04-25
21734 Tor 0.2.5.4-alpha includes several security and performance
21735 improvements for clients and relays, including blacklisting authority
21736 signing keys that were used while susceptible to the OpenSSL
21737 "heartbleed" bug, fixing two expensive functions on busy relays,
21738 improved TLS ciphersuite preference lists, support for run-time
21739 hardening on compilers that support AddressSanitizer, and more work on
21740 the Linux sandbox code.
21742 There are also several usability fixes for clients (especially clients
21743 that use bridges), two new TransPort protocols supported (one on
21744 OpenBSD, one on FreeBSD), and various other bugfixes.
21746 This release marks end-of-life for Tor 0.2.2.x; those Tor versions
21747 have accumulated many known flaws; everyone should upgrade.
21749 o Major features (security):
21750 - If you don't specify MaxMemInQueues yourself, Tor now tries to
21751 pick a good value based on your total system memory. Previously,
21752 the default was always 8 GB. You can still override the default by
21753 setting MaxMemInQueues yourself. Resolves ticket 11396.
21754 - Block authority signing keys that were used on authorities
21755 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
21756 don't have any evidence that these keys _were_ compromised; we're
21757 doing this to be prudent.) Resolves ticket 11464.
21759 o Major features (relay performance):
21760 - Speed up server-side lookups of rendezvous and introduction point
21761 circuits by using hashtables instead of linear searches. These
21762 functions previously accounted between 3 and 7% of CPU usage on
21763 some busy relays. Resolves ticket 9841.
21764 - Avoid wasting CPU when extending a circuit over a channel that is
21765 nearly out of circuit IDs. Previously, we would do a linear scan
21766 over possible circuit IDs before finding one or deciding that we
21767 had exhausted our possibilities. Now, we try at most 64 random
21768 circuit IDs before deciding that we probably won't succeed. Fixes
21769 a possible root cause of ticket 11553.
21771 o Major features (seccomp2 sandbox, Linux only):
21772 - The seccomp2 sandbox can now run a test network for multiple hours
21773 without crashing. The sandbox is still experimental, and more bugs
21774 will probably turn up. To try it, enable "Sandbox 1" on a Linux
21775 host. Resolves ticket 11351.
21776 - Strengthen sandbox code: the sandbox can now test the arguments
21777 for rename(), and blocks _sysctl() entirely. Resolves another part
21779 - When the sandbox blocks a system call, it now tries to log a stack
21780 trace before exiting. Resolves ticket 11465.
21782 o Major bugfixes (TLS cipher selection):
21783 - The relay ciphersuite list is now generated automatically based on
21784 uniform criteria, and includes all OpenSSL ciphersuites with
21785 acceptable strength and forward secrecy. Previously, we had left
21786 some perfectly fine ciphersuites unsupported due to omission or
21787 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
21788 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
21789 - Relays now trust themselves to have a better view than clients of
21790 which TLS ciphersuites are better than others. (Thanks to bug
21791 11513, the relay list is now well-considered, whereas the client
21792 list has been chosen mainly for anti-fingerprinting purposes.)
21793 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
21794 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
21795 AES128. Resolves ticket 11528.
21796 - Clients now try to advertise the same list of ciphersuites as
21797 Firefox 28. This change enables selection of (fast) GCM
21798 ciphersuites, disables some strange old ciphers, and stops
21799 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
21800 Resolves ticket 11438.
21802 o Major bugfixes (bridge client):
21803 - Avoid 60-second delays in the bootstrapping process when Tor is
21804 launching for a second time while using bridges. Fixes bug 9229;
21805 bugfix on 0.2.0.3-alpha.
21807 o Minor features (transparent proxy, *BSD):
21808 - Support FreeBSD's ipfw firewall interface for TransPort ports on
21809 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
21810 10267; patch from "yurivict".
21811 - Support OpenBSD's divert-to rules with the pf firewall for
21812 transparent proxy ports. To enable it, set "TransProxyType
21813 pf-divert". This allows Tor to run a TransPort transparent proxy
21814 port on OpenBSD 4.4 or later without root privileges. See the
21815 pf.conf(5) manual page for information on configuring pf to use
21816 divert-to rules. Closes ticket 10896; patch from Dana Koch.
21818 o Minor features (security):
21819 - New --enable-expensive-hardening option to enable security
21820 hardening options that consume nontrivial amounts of CPU and
21821 memory. Right now, this includes AddressSanitizer and UbSan, which
21822 are supported in newer versions of GCC and Clang. Closes ticket
21825 o Minor features (log verbosity):
21826 - Demote the message that we give when a flushing connection times
21827 out for too long from NOTICE to INFO. It was usually meaningless.
21828 Resolves ticket 5286.
21829 - Don't log so many notice-level bootstrapping messages at startup
21830 about downloading descriptors. Previously, we'd log a notice
21831 whenever we learned about more routers. Now, we only log a notice
21832 at every 5% of progress. Fixes bug 9963.
21833 - Warn less verbosely when receiving a malformed
21834 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
21835 - When we run out of usable circuit IDs on a channel, log only one
21836 warning for the whole channel, and describe how many circuits
21837 there were on the channel. Fixes part of ticket 11553.
21839 o Minor features (relay):
21840 - If a circuit timed out for at least 3 minutes, check if we have a
21841 new external IP address, and publish a new descriptor with the new
21842 IP address if it changed. Resolves ticket 2454.
21844 o Minor features (controller):
21845 - Make the entire exit policy available from the control port via
21846 GETINFO exit-policy/*. Implements enhancement 7952. Patch from
21848 - Because of the fix for ticket 11396, the real limit for memory
21849 usage may no longer match the configured MaxMemInQueues value. The
21850 real limit is now exposed via GETINFO limits/max-mem-in-queues.
21852 o Minor features (bridge client):
21853 - Report a more useful failure message when we can't connect to a
21854 bridge because we don't have the right pluggable transport
21855 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
21857 o Minor features (diagnostic):
21858 - Add more log messages to diagnose bug 7164, which causes
21859 intermittent "microdesc_free() called but md was still referenced"
21860 warnings. We now include more information, to figure out why we
21861 might be cleaning a microdescriptor for being too old if it's
21862 still referenced by a live node_t object.
21864 o Minor bugfixes (client, DNSPort):
21865 - When using DNSPort, try to respond to AAAA requests with AAAA
21866 answers. Previously, we hadn't looked at the request type when
21867 deciding which answer type to prefer. Fixes bug 10468; bugfix on
21869 - When receiving a DNS query for an unsupported record type, reply
21870 with no answer rather than with a NOTIMPL error. This behavior
21871 isn't correct either, but it will break fewer client programs, we
21872 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
21875 o Minor bugfixes (exit relay):
21876 - Stop leaking memory when we successfully resolve a PTR record.
21877 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
21879 o Minor bugfixes (bridge client):
21880 - Stop accepting bridge lines containing hostnames. Doing so would
21881 cause clients to perform DNS requests on the hostnames, which was
21882 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
21883 - Avoid a 60-second delay in the bootstrapping process when a Tor
21884 client with pluggable transports re-reads its configuration at
21885 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
21887 o Minor bugfixes (client, logging during bootstrap):
21888 - Warn only once if we start logging in an unsafe way. Previously,
21889 we complain as many times as we had problems. Fixes bug 9870;
21890 bugfix on 0.2.5.1-alpha.
21891 - Only report the first fatal bootstrap error on a given OR
21892 connection. This stops us from telling the controller bogus error
21893 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
21894 - Be more helpful when trying to run sandboxed on Linux without
21895 libseccomp. Instead of saying "Sandbox is not implemented on this
21896 platform", we now explain that we need to be built with
21897 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
21898 - Avoid generating spurious warnings when starting with
21899 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
21902 o Minor bugfixes (closing OR connections):
21903 - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
21904 check if it's an or_connection_t and correctly call
21905 connection_or_close_for_error() rather than
21906 connection_mark_for_close() directly. Fixes bug 11304; bugfix on
21908 - When closing all connections on setting DisableNetwork to 1, use
21909 connection_or_close_normally() rather than closing OR connections
21910 out from under the channel layer. Fixes bug 11306; bugfix on
21913 o Minor bugfixes (controller):
21914 - Avoid sending a garbage value to the controller when a circuit is
21915 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
21917 o Minor bugfixes (tor-fw-helper):
21918 - Allow tor-fw-helper to build again by adding src/ext to its
21919 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
21921 o Minor bugfixes (bridges):
21922 - Avoid potential crashes or bad behavior when launching a
21923 server-side managed proxy with ORPort or ExtORPort temporarily
21924 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
21926 o Minor bugfixes (platform-specific):
21927 - Fix compilation on Solaris, which does not have <endian.h>. Fixes
21928 bug 11426; bugfix on 0.2.5.3-alpha.
21929 - When dumping a malformed directory object to disk, save it in
21930 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
21932 - Don't report failures from make_socket_reuseable() on incoming
21933 sockets on OSX: this can happen when incoming connections close
21934 early. Fixes bug 10081.
21936 o Minor bugfixes (trivial memory leaks):
21937 - Fix a small memory leak when signing a directory object. Fixes bug
21938 11275; bugfix on 0.2.4.13-alpha.
21939 - Free placeholder entries in our circuit table at exit; fixes a
21940 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
21941 - Don't re-initialize a second set of OpenSSL mutexes when starting
21942 up. Previously, we'd make one set of mutexes, and then immediately
21943 replace them with another. Fixes bug 11726; bugfix on
21945 - Resolve some memory leaks found by coverity in the unit tests, on
21946 exit in tor-gencert, and on a failure to compute digests for our
21947 own keys when generating a v3 networkstatus vote. These leaks
21948 should never have affected anyone in practice.
21950 o Minor bugfixes (hidden service):
21951 - Only retry attempts to connect to a chosen rendezvous point 8
21952 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
21954 o Minor bugfixes (misc code correctness):
21955 - Fix various instances of undefined behavior in channeltls.c,
21956 tor_memmem(), and eventdns.c that would cause us to construct
21957 pointers to memory outside an allocated object. (These invalid
21958 pointers were not accessed, but C does not even allow them to
21959 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
21960 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
21961 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
21962 fix some miscellaneous errors in our tests and codebase. Fixes bug
21963 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
21964 - Always check return values for unlink, munmap, UnmapViewOfFile;
21965 check strftime return values more often. In some cases all we can
21966 do is report a warning, but this may help prevent deeper bugs from
21967 going unnoticed. Closes ticket 8787; bugfixes on many, many tor
21969 - Fix numerous warnings from the clang "scan-build" static analyzer.
21970 Some of these are programming style issues; some of them are false
21971 positives that indicated awkward code; some are undefined behavior
21972 cases related to constructing (but not using) invalid pointers;
21973 some are assumptions about API behavior; some are (harmlessly)
21974 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
21975 correct; and one or two are genuine bugs that weren't reachable
21976 from the rest of the program. Fixes bug 8793; bugfixes on many,
21980 - Build the torify.1 manpage again. Previously, we were only trying
21981 to build it when also building tor-fw-helper. That's why we didn't
21982 notice that we'd broken the ability to build it. Fixes bug 11321;
21983 bugfix on 0.2.5.1-alpha.
21984 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
21985 11061; bugfix on 0.2.4.7-alpha.
21986 - Correctly document that we search for a system torrc file before
21987 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
21989 - Resolve warnings from Doxygen.
21991 o Code simplifications and refactoring:
21992 - Remove is_internal_IP() function. Resolves ticket 4645.
21993 - Remove unused function circuit_dump_by_chan from circuitlist.c.
21994 Closes issue 9107; patch from "marek".
21995 - Change our use of the ENUM_BF macro to avoid declarations that
21998 o Deprecated versions:
21999 - Tor 0.2.2.x has reached end-of-life; it has received no patches or
22000 attention for some while. Directory authorities no longer accept
22001 descriptors from relays running any version of Tor prior to Tor
22002 0.2.3.16-alpha. Resolves ticket 11149.
22005 - New macros in test.h to simplify writing mock-functions for unit
22006 tests. Part of ticket 11507. Patch from Dana Koch.
22007 - Complete tests for the status.c module. Resolves ticket 11507.
22008 Patch from Dana Koch.
22011 - Remove all code for the long unused v1 directory protocol.
22012 Resolves ticket 11070.
22015 Changes in version 0.2.5.3-alpha - 2014-03-22
22016 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
22017 two new anti-DoS features for Tor relays, resolves a bug that kept
22018 SOCKS5 support for IPv6 from working, fixes several annoying usability
22019 issues for bridge users, and removes more old code for unused
22022 The Tor 0.2.5.x release series is now in patch-freeze: no feature
22023 patches not already written will be considered for inclusion in 0.2.5.x.
22025 o Major features (relay security, DoS-resistance):
22026 - When deciding whether we have run out of memory and we need to
22027 close circuits, also consider memory allocated in buffers for
22028 streams attached to each circuit.
22030 This change, which extends an anti-DoS feature introduced in
22031 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
22032 better resist more memory-based DoS attacks than before. Since the
22033 MaxMemInCellQueues option now applies to all queues, it is renamed
22034 to MaxMemInQueues. This feature fixes bug 10169.
22035 - Avoid hash-flooding denial-of-service attacks by using the secure
22036 SipHash-2-4 hash function for our hashtables. Without this
22037 feature, an attacker could degrade performance of a targeted
22038 client or server by flooding their data structures with a large
22039 number of entries to be stored at the same hash table position,
22040 thereby slowing down the Tor instance. With this feature, hash
22041 table positions are derived from a randomized cryptographic key,
22042 and an attacker cannot predict which entries will collide. Closes
22044 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
22045 the default at 8GBytes), to better support Raspberry Pi users. Fixes
22046 bug 9686; bugfix on 0.2.4.14-alpha.
22048 o Minor features (bridges, pluggable transports):
22049 - Bridges now write the SHA1 digest of their identity key
22050 fingerprint (that is, a hash of a hash of their public key) to
22051 notice-level logs, and to a new hashed-fingerprint file. This
22052 information will help bridge operators look up their bridge in
22053 Globe and similar tools. Resolves ticket 10884.
22054 - Improve the message that Tor displays when running as a bridge
22055 using pluggable transports without an Extended ORPort listener.
22056 Also, log the message in the log file too. Resolves ticket 11043.
22058 o Minor features (other):
22059 - Add a new option, PredictedPortsRelevanceTime, to control how long
22060 after having received a request to connect to a given port Tor
22061 will try to keep circuits ready in anticipation of future requests
22062 for that port. Patch from "unixninja92"; implements ticket 9176.
22063 - Generate a warning if any ports are listed in the SocksPolicy,
22064 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
22065 AuthDirBadExit options. (These options only support address
22066 ranges.) Fixes part of ticket 11108.
22067 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
22070 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
22071 - Build without warnings under clang 3.4. (We have some macros that
22072 define static functions only some of which will get used later in
22073 the module. Starting with clang 3.4, these give a warning unless the
22074 unused attribute is set on them.) Resolves ticket 10904.
22075 - Fix build warnings about missing "a2x" comment when building the
22076 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
22077 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
22079 o Minor bugfixes (client):
22080 - Improve the log message when we can't connect to a hidden service
22081 because all of the hidden service directory nodes hosting its
22082 descriptor are excluded. Improves on our fix for bug 10722, which
22083 was a bugfix on 0.2.0.10-alpha.
22084 - Raise a control port warning when we fail to connect to all of
22085 our bridges. Previously, we didn't inform the controller, and
22086 the bootstrap process would stall. Fixes bug 11069; bugfix on
22088 - Exit immediately when a process-owning controller exits.
22089 Previously, tor relays would wait for a little while after their
22090 controller exited, as if they had gotten an INT signal -- but this
22091 was problematic, since there was no feedback for the user. To do a
22092 clean shutdown, controllers should send an INT signal and give Tor
22093 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
22094 - Stop attempting to connect to bridges before our pluggable
22095 transports are configured (harmless but resulted in some erroneous
22096 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
22097 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
22098 generating incorrect SOCKS5 responses, and confusing client
22099 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
22101 o Minor bugfixes (relays and bridges):
22102 - Avoid crashing on a malformed resolv.conf file when running a
22103 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
22104 - Non-exit relays no longer launch mock DNS requests to check for
22105 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
22106 non-exit relays stopped servicing DNS requests. Fixes bug 965;
22107 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
22108 - Bridges now report complete directory request statistics. Related
22109 to bug 5824; bugfix on 0.2.2.1-alpha.
22110 - Bridges now never collect statistics that were designed for
22111 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
22112 - Stop giving annoying warning messages when we decide not to launch
22113 a pluggable transport proxy that we don't need (because there are
22114 no bridges configured to use it). Resolves ticket 5018; bugfix
22116 - Give the correct URL in the warning message when trying to run a
22117 relay on an ancient version of Windows. Fixes bug 9393.
22119 o Minor bugfixes (backtrace support):
22120 - Support automatic backtraces on more platforms by using the
22121 "-fasynchronous-unwind-tables" compiler option. This option is
22122 needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
22123 is on by default and table generation is not. This doesn't yet
22124 add Windows support; only Linux, OSX, and some BSDs are affected.
22125 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
22126 - Avoid strange behavior if two threads hit failed assertions at the
22127 same time and both try to log backtraces at once. (Previously, if
22128 this had happened, both threads would have stored their intermediate
22129 results in the same buffer, and generated junk outputs.) Reported by
22130 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
22131 - Fix a compiler warning in format_number_sigsafe(). Bugfix on
22132 0.2.5.2-alpha; patch from Nick Hopper.
22134 o Minor bugfixes (unit tests):
22135 - Fix a small bug in the unit tests that might have made the tests
22136 call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
22137 bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
22140 - Remove all remaining code related to version-0 hidden service
22141 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
22142 the rest of bug 10841.
22145 - Document in the manpage that "KBytes" may also be written as
22146 "kilobytes" or "KB", that "Kbits" may also be written as
22147 "kilobits", and so forth. Closes ticket 9222.
22148 - Document that the ClientOnly config option overrides ORPort.
22149 Our old explanation made ClientOnly sound as though it did
22150 nothing at all. Resolves bug 9059.
22151 - Explain that SocksPolicy, DirPolicy, and similar options don't
22152 take port arguments. Fixes the other part of ticket 11108.
22153 - Fix a comment about the rend_server_descriptor_t.protocols field
22154 to more accurately describe its range. Also, make that field
22155 unsigned, to more accurately reflect its usage. Fixes bug 9099;
22156 bugfix on 0.2.1.5-alpha.
22157 - Fix the manpage's description of HiddenServiceAuthorizeClient:
22158 the maximum client name length is 16, not 19. Fixes bug 11118;
22159 bugfix on 0.2.1.6-alpha.
22161 o Code simplifications and refactoring:
22162 - Get rid of router->address, since in all cases it was just the
22163 string representation of router->addr. Resolves ticket 5528.
22165 o Test infrastructure:
22166 - Update to the latest version of tinytest.
22167 - Improve the tinytest implementation of string operation tests so
22168 that comparisons with NULL strings no longer crash the tests; they
22169 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
22172 Changes in version 0.2.4.21 - 2014-02-28
22173 Tor 0.2.4.21 further improves security against potential adversaries who
22174 find breaking 1024-bit crypto doable, and backports several stability
22175 and robustness patches from the 0.2.5 branch.
22177 o Major features (client security):
22178 - When we choose a path for a 3-hop circuit, make sure it contains
22179 at least one relay that supports the NTor circuit extension
22180 handshake. Otherwise, there is a chance that we're building
22181 a circuit that's worth attacking by an adversary who finds
22182 breaking 1024-bit crypto doable, and that chance changes the game
22183 theory. Implements ticket 9777.
22186 - Do not treat streams that fail with reason
22187 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
22188 since it could also indicate an ENETUNREACH connection error. Fixes
22189 part of bug 10777; bugfix on 0.2.4.8-alpha.
22191 o Code simplification and refactoring:
22192 - Remove data structures which were introduced to implement the
22193 CellStatistics option: they are now redundant with the new timestamp
22194 field in the regular packed_cell_t data structure, which we did
22195 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
22198 - Always clear OpenSSL bignums before freeing them -- even bignums
22199 that don't contain secrets. Resolves ticket 10793. Patch by
22201 - Build without warnings under clang 3.4. (We have some macros that
22202 define static functions only some of which will get used later in
22203 the module. Starting with clang 3.4, these give a warning unless the
22204 unused attribute is set on them.) Resolves ticket 10904.
22205 - Update geoip and geoip6 files to the February 7 2014 Maxmind
22206 GeoLite2 Country database.
22209 - Set the listen() backlog limit to the largest actually supported
22210 on the system, not to the value in a header file. Fixes bug 9716;
22211 bugfix on every released Tor.
22212 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
22213 exit node as a NOROUTE error, not an INTERNAL error, since they
22214 can apparently happen when trying to connect to the wrong sort
22215 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
22216 - Fix build warnings about missing "a2x" comment when building the
22217 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
22218 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
22219 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
22220 not entirely remove it from the connection lists. Fixes bug 9602;
22221 bugfix on 0.2.4.4-alpha.
22222 - Fix a segmentation fault in our benchmark code when running with
22223 Fedora's OpenSSL package, or any other OpenSSL that provides
22224 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
22225 - Turn "circuit handshake stats since last time" log messages into a
22226 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
22228 o Documentation fixes:
22229 - Document that all but one DirPort entry must have the NoAdvertise
22230 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
22233 Changes in version 0.2.5.2-alpha - 2014-02-13
22234 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
22235 like the "poor random number generation" fix and the "building too many
22236 circuits" fix. It also further improves security against potential
22237 adversaries who find breaking 1024-bit crypto doable, and launches
22238 pluggable transports on demand (which gets us closer to integrating
22239 pluggable transport support by default -- not to be confused with Tor
22240 bundles enabling pluggable transports and bridges by default).
22242 o Major features (client security):
22243 - When we choose a path for a 3-hop circuit, make sure it contains
22244 at least one relay that supports the NTor circuit extension
22245 handshake. Otherwise, there is a chance that we're building
22246 a circuit that's worth attacking by an adversary who finds
22247 breaking 1024-bit crypto doable, and that chance changes the game
22248 theory. Implements ticket 9777.
22249 - Clients now look at the "usecreatefast" consensus parameter to
22250 decide whether to use CREATE_FAST or CREATE cells for the first hop
22251 of their circuit. This approach can improve security on connections
22252 where Tor's circuit handshake is stronger than the available TLS
22253 connection security levels, but the tradeoff is more computational
22254 load on guard relays. Implements proposal 221. Resolves ticket 9386.
22256 o Major features (bridges):
22257 - Don't launch pluggable transport proxies if we don't have any
22258 bridges configured that would use them. Now we can list many
22259 pluggable transports, and Tor will dynamically start one when it
22260 hears a bridge address that needs it. Resolves ticket 5018.
22261 - The bridge directory authority now assigns status flags (Stable,
22262 Guard, etc) to bridges based on thresholds calculated over all
22263 Running bridges. Now bridgedb can finally make use of its features
22264 to e.g. include at least one Stable bridge in its answers. Fixes
22267 o Major features (other):
22268 - Extend ORCONN controller event to include an "ID" parameter,
22269 and add four new controller event types CONN_BW, CIRC_BW,
22270 CELL_STATS, and TB_EMPTY that show connection and circuit usage.
22271 The new events are emitted in private Tor networks only, with the
22272 goal of being able to better track performance and load during
22273 full-network simulations. Implements proposal 218 and ticket 7359.
22274 - On some platforms (currently: recent OSX versions, glibc-based
22275 platforms that support the ELF format, and a few other
22276 Unix-like operating systems), Tor can now dump stack traces
22277 when a crash occurs or an assertion fails. By default, traces
22278 are dumped to stderr (if possible) and to any logs that are
22279 reporting errors. Implements ticket 9299.
22282 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
22283 not entirely remove it from the connection lists. Fixes bug 9602;
22284 bugfix on 0.2.4.4-alpha.
22285 - Do not treat streams that fail with reason
22286 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
22287 since it could also indicate an ENETUNREACH connection error. Fixes
22288 part of bug 10777; bugfix on 0.2.4.8-alpha.
22290 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
22291 - Do not allow OpenSSL engines to replace the PRNG, even when
22292 HardwareAccel is set. The only default builtin PRNG engine uses
22293 the Intel RDRAND instruction to replace the entire PRNG, and
22294 ignores all attempts to seed it with more entropy. That's
22295 cryptographically stupid: the right response to a new alleged
22296 entropy source is never to discard all previously used entropy
22297 sources. Fixes bug 10402; works around behavior introduced in
22298 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
22300 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
22301 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
22302 - Avoid launching spurious extra circuits when a stream is pending.
22303 This fixes a bug where any circuit that _wasn't_ unusable for new
22304 streams would be treated as if it were, causing extra circuits to
22305 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
22307 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
22308 - No longer stop reading or writing on cpuworker connections when
22309 our rate limiting buckets go empty. Now we should handle circuit
22310 handshake requests more promptly. Resolves bug 9731.
22311 - Stop trying to bootstrap all our directory information from
22312 only our first guard. Discovered while fixing bug 9946; bugfix
22315 o Minor features (bridges, pluggable transports):
22316 - Add threshold cutoffs to the networkstatus document created by
22317 the Bridge Authority. Fixes bug 1117.
22318 - On Windows, spawn background processes using the CREATE_NO_WINDOW
22319 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
22320 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
22321 Vidalia set this option for us.) Implements ticket 10297.
22323 o Minor features (security):
22324 - Always clear OpenSSL bignums before freeing them -- even bignums
22325 that don't contain secrets. Resolves ticket 10793. Patch by
22328 o Minor features (config options and command line):
22329 - Add an --allow-missing-torrc commandline option that tells Tor to
22330 run even if the configuration file specified by -f is not available.
22331 Implements ticket 10060.
22332 - Add support for the TPROXY transparent proxying facility on Linux.
22333 See documentation for the new TransProxyType option for more
22334 details. Implementation by "thomo". Closes ticket 10582.
22336 o Minor features (controller):
22337 - Add a new "HS_DESC" controller event that reports activities
22338 related to hidden service descriptors. Resolves ticket 8510.
22339 - New "DROPGUARDS" controller command to forget all current entry
22340 guards. Not recommended for ordinary use, since replacing guards
22341 too frequently makes several attacks easier. Resolves ticket 9934;
22344 o Minor features (build):
22345 - Assume that a user using ./configure --host wants to cross-compile,
22346 and give an error if we cannot find a properly named
22347 tool-chain. Add a --disable-tool-name-check option to proceed
22348 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
22349 - If we run ./configure and the compiler recognizes -fstack-protector
22350 but the linker rejects it, warn the user about a potentially missing
22351 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
22353 o Minor features (testing):
22354 - If Python is installed, "make check" now runs extra tests beyond
22355 the unit test scripts.
22356 - When bootstrapping a test network, sometimes very few relays get
22357 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
22358 specify a set of relays which should be voted Guard regardless of
22359 their uptime or bandwidth. Addresses ticket 9206.
22361 o Minor features (log messages):
22362 - When ServerTransportPlugin is set on a bridge, Tor can write more
22363 useful statistics about bridge use in its extrainfo descriptors,
22364 but only if the Extended ORPort ("ExtORPort") is set too. Add a
22365 log message to inform the user in this case. Resolves ticket 9651.
22366 - When receiving a new controller connection, log the origin address.
22367 Resolves ticket 9698; patch from "sigpipe".
22368 - When logging OpenSSL engine status at startup, log the status of
22369 more engines. Fixes ticket 10043; patch from Joshua Datko.
22370 - Turn "circuit handshake stats since last time" log messages into a
22371 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
22373 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
22374 - Improve the circuit queue out-of-memory handler. Previously, when
22375 we ran low on memory, we'd close whichever circuits had the most
22376 queued cells. Now, we close those that have the *oldest* queued
22377 cells, on the theory that those are most responsible for us
22378 running low on memory. Based on analysis from a forthcoming paper
22379 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
22380 - Generate bootstrapping status update events correctly when fetching
22381 microdescriptors. Fixes bug 9927.
22382 - Update to the October 2 2013 Maxmind GeoLite Country database.
22384 o Minor bugfixes (clients):
22385 - When closing a channel that has already been open, do not close
22386 pending circuits that were waiting to connect to the same relay.
22387 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
22390 o Minor bugfixes (relays):
22391 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
22392 exit node as a NOROUTE error, not an INTERNAL error, since they
22393 can apparently happen when trying to connect to the wrong sort
22394 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
22396 o Minor bugfixes (bridges):
22397 - Fix a bug where the first connection works to a bridge that uses a
22398 pluggable transport with client-side parameters, but we don't send
22399 the client-side parameters on subsequent connections. (We don't
22400 use any pluggable transports with client-side parameters yet,
22401 but ScrambleSuit will soon become the first one.) Fixes bug 9162;
22402 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
22404 o Minor bugfixes (node selection):
22405 - If ExcludeNodes is set, consider non-excluded hidden service
22406 directory servers before excluded ones. Do not consider excluded
22407 hidden service directory servers at all if StrictNodes is
22408 set. (Previously, we would sometimes decide to connect to those
22409 servers, and then realize before we initiated a connection that
22410 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
22411 Reported by "mr-4".
22412 - If we set the ExitNodes option but it doesn't include any nodes
22413 that have the Exit flag, we would choose not to bootstrap. Now we
22414 bootstrap so long as ExitNodes includes nodes which can exit to
22415 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
22417 o Minor bugfixes (controller and command-line):
22418 - If changing a config option via "setconf" fails in a recoverable
22419 way, we used to nonetheless write our new control ports to the
22420 file described by the "ControlPortWriteToFile" option. Now we only
22421 write out that file if we successfully switch to the new config
22422 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
22423 - When a command-line option such as --version or --help that
22424 ordinarily implies --hush appears on the command line along with
22425 --quiet, then actually obey --quiet. Previously, we obeyed --quiet
22426 only if it appeared later on the command line. Fixes bug 9578;
22427 bugfix on 0.2.5.1-alpha.
22429 o Minor bugfixes (code correctness):
22430 - Previously we used two temporary files when writing descriptors to
22431 disk; now we only use one. Fixes bug 1376.
22432 - Remove an erroneous (but impossible and thus harmless) pointer
22433 comparison that would have allowed compilers to skip a bounds
22434 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
22435 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
22436 - Fix an always-true assertion in pluggable transports code so it
22437 actually checks what it was trying to check. Fixes bug 10046;
22438 bugfix on 0.2.3.9-alpha. Found by "dcb".
22440 o Minor bugfixes (protocol correctness):
22441 - When receiving a VERSIONS cell with an odd number of bytes, close
22442 the connection immediately since the cell is malformed. Fixes bug
22443 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
22446 o Minor bugfixes (build):
22447 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
22448 turned off (that is, without support for v2 link handshakes). Fixes
22449 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
22450 - Fix compilation warnings and startup issues when running with
22451 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
22453 - Fix compilation on Solaris 9, which didn't like us having an
22454 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
22456 o Minor bugfixes (testing):
22457 - Fix a segmentation fault in our benchmark code when running with
22458 Fedora's OpenSSL package, or any other OpenSSL that provides
22459 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
22461 o Minor bugfixes (log messages):
22462 - Fix a bug where clients using bridges would report themselves
22463 as 50% bootstrapped even without a live consensus document.
22464 Fixes bug 9922; bugfix on 0.2.1.1-alpha.
22465 - Suppress a warning where, if there's only one directory authority
22466 in the network, we would complain that votes and signatures cannot
22467 be uploaded to other directory authorities. Fixes bug 10842;
22468 bugfix on 0.2.2.26-beta.
22469 - Report bootstrapping progress correctly when we're downloading
22470 microdescriptors. We had updated our "do we have enough microdescs
22471 to begin building circuits?" logic most recently in 0.2.4.10-alpha
22472 (see bug 5956), but we left the bootstrap status event logic at
22473 "how far through getting 1/4 of them are we?" Fixes bug 9958;
22474 bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
22476 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
22477 - Avoid a crash bug when starting with a corrupted microdescriptor
22478 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
22479 - If we fail to dump a previously cached microdescriptor to disk, avoid
22480 freeing duplicate data later on. Fixes bug 10423; bugfix on
22481 0.2.4.13-alpha. Spotted by "bobnomnom".
22483 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
22484 - Correctly log long IPv6 exit policies, instead of truncating them
22485 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
22486 - Our default TLS ecdhe groups were backwards: we meant to be using
22487 P224 for relays (for performance win) and P256 for bridges (since
22488 it is more common in the wild). Instead we had it backwards. After
22489 reconsideration, we decided that the default should be P256 on all
22490 hosts, since its security is probably better, and since P224 is
22491 reportedly used quite little in the wild. Found by "skruffy" on
22492 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
22493 - Free directory authority certificate download statuses on exit
22494 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
22496 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
22497 - If the guard we choose first doesn't answer, we would try the
22498 second guard, but once we connected to the second guard we would
22499 abandon it and retry the first one, slowing down bootstrapping.
22500 The fix is to treat all our initially chosen guards as acceptable
22501 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
22502 - Fix an assertion failure that would occur when disabling the
22503 ORPort setting on a running Tor process while accounting was
22504 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
22505 - When examining the list of network interfaces to find our address,
22506 do not consider non-running or disabled network interfaces. Fixes
22507 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
22508 - Avoid an off-by-one error when checking buffer boundaries when
22509 formatting the exit status of a pluggable transport helper.
22510 This is probably not an exploitable bug, but better safe than
22511 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
22514 o Removed code and features:
22515 - Clients now reject any directory authority certificates lacking
22516 a dir-key-crosscert element. These have been included since
22517 0.2.1.9-alpha, so there's no real reason for them to be optional
22518 any longer. Completes proposal 157. Resolves ticket 10162.
22519 - Remove all code that existed to support the v2 directory system,
22520 since there are no longer any v2 directory authorities. Resolves
22522 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
22523 options, which were used for designating authorities as "Hidden
22524 service authorities". There has been no use of hidden service
22525 authorities since 0.2.2.1-alpha, when we stopped uploading or
22526 downloading v0 hidden service descriptors. Fixes bug 10881; also
22527 part of a fix for bug 10841.
22529 o Code simplification and refactoring:
22530 - Remove some old fallback code designed to keep Tor clients working
22531 in a network with only two working relays. Elsewhere in the code we
22532 have long since stopped supporting such networks, so there wasn't
22533 much point in keeping it around. Addresses ticket 9926.
22534 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
22535 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
22536 - Remove data structures which were introduced to implement the
22537 CellStatistics option: they are now redundant with the addition
22538 of a timestamp to the regular packed_cell_t data structure, which
22539 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
22542 o Documentation (man page) fixes:
22543 - Update manpage to describe some of the files you can expect to
22544 find in Tor's DataDirectory. Addresses ticket 9839.
22545 - Document that all but one DirPort entry must have the NoAdvertise
22546 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
22548 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
22549 - Clarify the usage and risks of setting the ContactInfo torrc line
22550 for your relay or bridge. Resolves ticket 9854.
22551 - Add anchors to the manpage so we can link to the html version of
22552 the documentation for specific options. Resolves ticket 9866.
22553 - Replace remaining references to DirServer in man page and
22554 log entries. Resolves ticket 10124.
22557 - Make the "tor-gencert" tool used by directory authority operators
22558 create 2048-bit signing keys by default (rather than 1024-bit, since
22559 1024-bit is uncomfortably small these days). Addresses ticket 10324.
22562 Changes in version 0.2.4.20 - 2013-12-22
22563 Tor 0.2.4.20 fixes potentially poor random number generation for users
22564 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
22565 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
22566 and 4) have no state file in their DataDirectory (as would happen on
22567 first start). Users who generated relay or hidden service identity
22568 keys in such a situation should discard them and generate new ones.
22570 This release also fixes a logic error that caused Tor clients to build
22571 many more preemptive circuits than they actually need.
22574 - Do not allow OpenSSL engines to replace the PRNG, even when
22575 HardwareAccel is set. The only default builtin PRNG engine uses
22576 the Intel RDRAND instruction to replace the entire PRNG, and
22577 ignores all attempts to seed it with more entropy. That's
22578 cryptographically stupid: the right response to a new alleged
22579 entropy source is never to discard all previously used entropy
22580 sources. Fixes bug 10402; works around behavior introduced in
22581 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
22583 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
22584 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
22585 - Avoid launching spurious extra circuits when a stream is pending.
22586 This fixes a bug where any circuit that _wasn't_ unusable for new
22587 streams would be treated as if it were, causing extra circuits to
22588 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
22591 - Avoid a crash bug when starting with a corrupted microdescriptor
22592 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
22593 - If we fail to dump a previously cached microdescriptor to disk, avoid
22594 freeing duplicate data later on. Fixes bug 10423; bugfix on
22595 0.2.4.13-alpha. Spotted by "bobnomnom".
22598 Changes in version 0.2.4.19 - 2013-12-11
22599 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
22600 (1986-2013). Aaron worked on diverse projects including helping to guide
22601 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
22602 transparency to the U.S government's PACER documents, and contributing
22603 design and development for Tor and Tor2Web. Aaron was one of the latest
22604 martyrs in our collective fight for civil liberties and human rights,
22605 and his death is all the more painful because he was one of us.
22607 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
22608 a new circuit handshake and link encryption that use ECC to provide
22609 better security and efficiency; makes relays better manage circuit
22610 creation requests; uses "directory guards" to reduce client enumeration
22611 risks; makes bridges collect and report statistics about the pluggable
22612 transports they support; cleans up and improves our geoip database;
22613 gets much closer to IPv6 support for clients, bridges, and relays; makes
22614 directory authorities use measured bandwidths rather than advertised
22615 ones when computing flags and thresholds; disables client-side DNS
22616 caching to reduce tracking risks; and fixes a big bug in bridge
22617 reachability testing. This release introduces two new design
22618 abstractions in the code: a new "channel" abstraction between circuits
22619 and or_connections to allow for implementing alternate relay-to-relay
22620 transports, and a new "circuitmux" abstraction storing the queue of
22621 circuits for a channel. The release also includes many stability,
22622 security, and privacy fixes.
22625 Changes in version 0.2.4.18-rc - 2013-11-16
22626 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
22627 series. It takes a variety of fixes from the 0.2.5.x branch to improve
22628 stability, performance, and better handling of edge cases.
22631 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
22632 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
22633 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
22634 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
22635 them to solve bug 6033.)
22638 - No longer stop reading or writing on cpuworker connections when
22639 our rate limiting buckets go empty. Now we should handle circuit
22640 handshake requests more promptly. Resolves bug 9731.
22641 - If we are unable to save a microdescriptor to the journal, do not
22642 drop it from memory and then reattempt downloading it. Fixes bug
22643 9645; bugfix on 0.2.2.6-alpha.
22644 - Stop trying to bootstrap all our directory information from
22645 only our first guard. Discovered while fixing bug 9946; bugfix
22647 - The new channel code sometimes lost track of in-progress circuits,
22648 causing long-running clients to stop building new circuits. The
22649 fix is to always call circuit_n_chan_done(chan, 0) from
22650 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
22652 o Minor bugfixes (on 0.2.4.x):
22653 - Correctly log long IPv6 exit policies, instead of truncating them
22654 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
22655 - Our default TLS ecdhe groups were backwards: we meant to be using
22656 P224 for relays (for performance win) and P256 for bridges (since
22657 it is more common in the wild). Instead we had it backwards. After
22658 reconsideration, we decided that the default should be P256 on all
22659 hosts, since its security is probably better, and since P224 is
22660 reportedly used quite little in the wild. Found by "skruffy" on
22661 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
22662 - Free directory authority certificate download statuses on exit
22663 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
22665 o Minor bugfixes (on 0.2.3.x and earlier):
22666 - If the guard we choose first doesn't answer, we would try the
22667 second guard, but once we connected to the second guard we would
22668 abandon it and retry the first one, slowing down bootstrapping.
22669 The fix is to treat all our initially chosen guards as acceptable
22670 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
22671 - Fix an assertion failure that would occur when disabling the
22672 ORPort setting on a running Tor process while accounting was
22673 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
22674 - When examining the list of network interfaces to find our address,
22675 do not consider non-running or disabled network interfaces. Fixes
22676 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
22677 - Avoid an off-by-one error when checking buffer boundaries when
22678 formatting the exit status of a pluggable transport helper.
22679 This is probably not an exploitable bug, but better safe than
22680 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
22683 o Minor features (protecting client timestamps):
22684 - Clients no longer send timestamps in their NETINFO cells. These were
22685 not used for anything, and they provided one small way for clients
22686 to be distinguished from each other as they moved from network to
22687 network or behind NAT. Implements part of proposal 222.
22688 - Clients now round timestamps in INTRODUCE cells down to the nearest
22689 10 minutes. If a new Support022HiddenServices option is set to 0, or
22690 if it's set to "auto" and the feature is disabled in the consensus,
22691 the timestamp is sent as 0 instead. Implements part of proposal 222.
22692 - Stop sending timestamps in AUTHENTICATE cells. This is not such
22693 a big deal from a security point of view, but it achieves no actual
22694 good purpose, and isn't needed. Implements part of proposal 222.
22695 - Reduce down accuracy of timestamps in hidden service descriptors.
22696 Implements part of proposal 222.
22698 o Minor features (other):
22699 - Improve the circuit queue out-of-memory handler. Previously, when
22700 we ran low on memory, we'd close whichever circuits had the most
22701 queued cells. Now, we close those that have the *oldest* queued
22702 cells, on the theory that those are most responsible for us
22703 running low on memory. Based on analysis from a forthcoming paper
22704 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
22705 - Generate bootstrapping status update events correctly when fetching
22706 microdescriptors. Fixes bug 9927.
22707 - Update to the October 2 2013 Maxmind GeoLite Country database.
22709 o Documentation fixes:
22710 - Clarify the usage and risks of setting the ContactInfo torrc line
22711 for your relay or bridge. Resolves ticket 9854.
22712 - Add anchors to the manpage so we can link to the html version of
22713 the documentation for specific options. Resolves ticket 9866.
22714 - Replace remaining references to DirServer in man page and
22715 log entries. Resolves ticket 10124.
22718 Changes in version 0.2.5.1-alpha - 2013-10-02
22719 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
22720 on Linux, allows bridges that offer pluggable transports to report usage
22721 statistics, fixes many issues to make testing easier, and provides
22722 a pile of minor features and bugfixes that have been waiting for a
22723 release of the new branch.
22725 This is the first alpha release in a new series, so expect there to
22726 be bugs. Users who would rather test out a more stable branch should
22727 stay with 0.2.4.x for now.
22729 o Major features (security):
22730 - Use the seccomp2 syscall filtering facility on Linux to limit
22731 which system calls Tor can invoke. This is an experimental,
22732 Linux-only feature to provide defense-in-depth against unknown
22733 attacks. To try turning it on, set "Sandbox 1" in your torrc
22734 file. Please be ready to report bugs. We hope to add support
22735 for better sandboxing in the future, including more fine-grained
22736 filters, better division of responsibility, and support for more
22737 platforms. This work has been done by Cristian-Matei Toader for
22738 Google Summer of Code.
22739 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
22740 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
22741 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
22742 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
22743 them to solve bug 6033.)
22745 o Major features (other):
22746 - Add support for passing arguments to managed pluggable transport
22747 proxies. Implements ticket 3594.
22748 - Bridges now track GeoIP information and the number of their users
22749 even when pluggable transports are in use, and report usage
22750 statistics in their extra-info descriptors. Resolves tickets 4773
22752 - Make testing Tor networks bootstrap better: lower directory fetch
22753 retry schedules and maximum interval without directory requests,
22754 and raise maximum download tries. Implements ticket 6752.
22755 - Add make target 'test-network' to run tests on a Chutney network.
22756 Implements ticket 8530.
22757 - The ntor handshake is now on-by-default, no matter what the
22758 directory authorities recommend. Implements ticket 8561.
22761 - Instead of writing destroy cells directly to outgoing connection
22762 buffers, queue them and intersperse them with other outgoing cells.
22763 This can prevent a set of resource starvation conditions where too
22764 many pending destroy cells prevent data cells from actually getting
22765 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
22766 bugfix on 0.2.0.1-alpha.
22767 - If we are unable to save a microdescriptor to the journal, do not
22768 drop it from memory and then reattempt downloading it. Fixes bug
22769 9645; bugfix on 0.2.2.6-alpha.
22770 - The new channel code sometimes lost track of in-progress circuits,
22771 causing long-running clients to stop building new circuits. The
22772 fix is to always call circuit_n_chan_done(chan, 0) from
22773 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
22776 - Tor now builds each source file in two modes: a mode that avoids
22777 exposing identifiers needlessly, and another mode that exposes
22778 more identifiers for testing. This lets the compiler do better at
22779 optimizing the production code, while enabling us to take more
22780 radical measures to let the unit tests test things.
22781 - The production builds no longer include functions used only in
22782 the unit tests; all functions exposed from a module only for
22783 unit-testing are now static in production builds.
22784 - Add an --enable-coverage configuration option to make the unit
22785 tests (and a new src/or/tor-cov target) to build with gcov test
22789 - We now have rudimentary function mocking support that our unit
22790 tests can use to test functions in isolation. Function mocking
22791 lets the tests temporarily replace a function's dependencies with
22792 stub functions, so that the tests can check the function without
22793 invoking the other functions it calls.
22794 - Add more unit tests for the <circid,channel>->circuit map, and
22795 the destroy-cell-tracking code to fix bug 7912.
22796 - Unit tests for failing cases of the TAP onion handshake.
22797 - More unit tests for address-manipulation functions.
22799 o Minor features (protecting client timestamps):
22800 - Clients no longer send timestamps in their NETINFO cells. These were
22801 not used for anything, and they provided one small way for clients
22802 to be distinguished from each other as they moved from network to
22803 network or behind NAT. Implements part of proposal 222.
22804 - Clients now round timestamps in INTRODUCE cells down to the nearest
22805 10 minutes. If a new Support022HiddenServices option is set to 0, or
22806 if it's set to "auto" and the feature is disabled in the consensus,
22807 the timestamp is sent as 0 instead. Implements part of proposal 222.
22808 - Stop sending timestamps in AUTHENTICATE cells. This is not such
22809 a big deal from a security point of view, but it achieves no actual
22810 good purpose, and isn't needed. Implements part of proposal 222.
22811 - Reduce down accuracy of timestamps in hidden service descriptors.
22812 Implements part of proposal 222.
22814 o Minor features (config options):
22815 - Config (torrc) lines now handle fingerprints which are missing
22816 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
22817 - Support a --dump-config option to print some or all of the
22818 configured options. Mainly useful for debugging the command-line
22819 option parsing code. Helps resolve ticket 4647.
22820 - Raise awareness of safer logging: notify user of potentially
22821 unsafe config options, like logging more verbosely than severity
22822 "notice" or setting SafeLogging to 0. Resolves ticket 5584.
22823 - Add a new configuration option TestingV3AuthVotingStartOffset
22824 that bootstraps a network faster by changing the timing for
22825 consensus votes. Addresses ticket 8532.
22826 - Add a new torrc option "ServerTransportOptions" that allows
22827 bridge operators to pass configuration parameters to their
22828 pluggable transports. Resolves ticket 8929.
22829 - The config (torrc) file now accepts bandwidth and space limits in
22830 bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
22831 you can now say "16 kilobits", and so on.) Resolves ticket 9214.
22834 o Minor features (build):
22835 - Add support for `--library-versions` flag. Implements ticket 6384.
22836 - Return the "unexpected sendme" warnings to a warn severity, but make
22837 them rate limited, to help diagnose ticket 8093.
22838 - Detect a missing asciidoc, and warn the user about it, during
22839 configure rather than at build time. Fixes issue 6506. Patch from
22842 o Minor features (other):
22843 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
22844 sockets in a single system call. Implements ticket 5129.
22845 - Log current accounting state (bytes sent and received + remaining
22846 time for the current accounting period) in the relay's heartbeat
22847 message. Implements ticket 5526; patch from Peter Retzlaff.
22848 - Implement the TRANSPORT_LAUNCHED control port event that
22849 notifies controllers about new launched pluggable
22850 transports. Resolves ticket 5609.
22851 - If we're using the pure-C 32-bit curve25519_donna implementation
22852 of curve25519, build it with the -fomit-frame-pointer option to
22853 make it go faster on register-starved hosts. This improves our
22854 handshake performance by about 6% on i386 hosts without nacl.
22855 Closes ticket 8109.
22856 - Update to the September 4 2013 Maxmind GeoLite Country database.
22859 - Set the listen() backlog limit to the largest actually supported
22860 on the system, not to the value in a header file. Fixes bug 9716;
22861 bugfix on every released Tor.
22862 - No longer accept malformed http headers when parsing urls from
22863 headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
22864 bugfix on 0.0.6pre1.
22865 - In munge_extrainfo_into_routerinfo(), check the return value of
22866 memchr(). This would have been a serious issue if we ever passed
22867 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
22869 - On the chance that somebody manages to build Tor on a
22870 platform where time_t is unsigned, correct the way that
22871 microdesc_add_to_cache() handles negative time arguments.
22872 Fixes bug 8042; bugfix on 0.2.3.1-alpha.
22873 - Reject relative control socket paths and emit a warning. Previously,
22874 single-component control socket paths would be rejected, but Tor
22875 would not log why it could not validate the config. Fixes bug 9258;
22876 bugfix on 0.2.3.16-alpha.
22878 o Minor bugfixes (command line):
22879 - Use a single command-line parser for parsing torrc options on the
22880 command line and for finding special command-line options to avoid
22881 inconsistent behavior for torrc option arguments that have the same
22882 names as command-line options. Fixes bugs 4647 and 9578; bugfix on
22884 - No longer allow 'tor --hash-password' with no arguments. Fixes bug
22885 9573; bugfix on 0.0.9pre5.
22887 o Minor fixes (build, auxiliary programs):
22888 - Stop preprocessing the "torify" script with autoconf, since
22889 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
22891 - The tor-fw-helper program now follows the standard convention and
22892 exits with status code "0" on success. Fixes bug 9030; bugfix on
22893 0.2.3.1-alpha. Patch by Arlo Breault.
22894 - Corrected ./configure advice for what openssl dev package you should
22895 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
22897 o Minor code improvements:
22898 - Remove constants and tests for PKCS1 padding; it's insecure and
22899 shouldn't be used for anything new. Fixes bug 8792; patch
22901 - Remove instances of strcpy() from the unit tests. They weren't
22902 hurting anything, since they were only in the unit tests, but it's
22903 embarrassing to have strcpy() in the code at all, and some analysis
22904 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
22905 0.2.3.8-alpha. Patch from Arlo Breault.
22907 o Removed features:
22908 - Remove migration code from when we renamed the "cached-routers"
22909 file to "cached-descriptors" back in 0.2.0.8-alpha. This
22910 incidentally resolves ticket 6502 by cleaning up the related code
22911 a bit. Patch from Akshay Hebbar.
22913 o Code simplification and refactoring:
22914 - Extract the common duplicated code for creating a subdirectory
22915 of the data directory and writing to a file in it. Fixes ticket
22916 4282; patch from Peter Retzlaff.
22917 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
22918 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
22919 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
22920 - Add a set of accessor functions for the circuit timeout data
22921 structure. Fixes ticket 6153; patch from "piet".
22922 - Clean up exit paths from connection_listener_new(). Closes ticket
22923 8789. Patch from Arlo Breault.
22924 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
22925 and drop our own custom pkey_eq() implementation. Fixes bug 9043.
22926 - Use a doubly-linked list to implement the global circuit list.
22927 Resolves ticket 9108. Patch from Marek Majkowski.
22928 - Remove contrib/id_to_fp.c since it wasn't used anywhere.
22931 Changes in version 0.2.4.17-rc - 2013-09-05
22932 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
22933 series. It adds an emergency step to help us tolerate the massive
22934 influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
22935 circuit-level handshakes now effectively jump the queue compared to
22936 the 0.2.3 clients using "TAP" handshakes. This release also fixes a
22937 big bug hindering bridge reachability tests.
22940 - Relays now process the new "NTor" circuit-level handshake requests
22941 with higher priority than the old "TAP" circuit-level handshake
22942 requests. We still process some TAP requests to not totally starve
22943 0.2.3 clients when NTor becomes popular. A new consensus parameter
22944 "NumNTorsPerTAP" lets us tune the balance later if we need to.
22945 Implements ticket 9574.
22948 - If the circuit build timeout logic is disabled (via the consensus,
22949 or because we are an authority), then don't build testing circuits.
22950 Fixes bug 9657; bugfix on 0.2.2.14-alpha.
22951 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
22952 previously they did not, which prevented them from receiving
22953 successful connections from relays for self-test or bandwidth
22954 testing. Also, when a relay is extending a circuit to a bridge,
22955 it needs to send a NETINFO cell, even when the bridge hasn't sent
22956 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
22957 - If the time to download the next old-style networkstatus is in
22958 the future, do not decline to consider whether to download the
22959 next microdescriptor networkstatus. Fixes bug 9564; bugfix on
22963 - Avoid double-closing the listener socket in our socketpair()
22964 replacement (used on Windows) in the case where the addresses on
22965 our opened sockets don't match what we expected. Fixes bug 9400;
22966 bugfix on 0.0.2pre7. Found by Coverity.
22968 o Minor fixes (config options):
22969 - Avoid overflows when the user sets MaxCircuitDirtiness to a
22970 ridiculously high value, by imposing a (ridiculously high) 30-day
22971 maximum on MaxCircuitDirtiness.
22972 - Fix the documentation of HeartbeatPeriod to say that the heartbeat
22973 message is logged at notice, not at info.
22974 - Warn and fail if a server is configured not to advertise any
22975 ORPorts at all. (We need *something* to put in our descriptor,
22976 or we just won't work.)
22979 - Track how many "TAP" and "NTor" circuit handshake requests we get,
22980 and how many we complete, and log it every hour to help relay
22981 operators follow trends in network load. Addresses ticket 9658.
22982 - Update to the August 7 2013 Maxmind GeoLite Country database.
22985 Changes in version 0.2.4.16-rc - 2013-08-10
22986 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
22987 series. It fixes several crash bugs in the 0.2.4 branch.
22990 - Fix a bug in the voting algorithm that could yield incorrect results
22991 when a non-naming authority declared too many flags. Fixes bug 9200;
22992 bugfix on 0.2.0.3-alpha.
22993 - Fix an uninitialized read that could in some cases lead to a remote
22994 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
22995 Anybody running a hidden service on the experimental 0.2.4.x
22996 branch should upgrade. (This is, so far as we know, unrelated to
22998 - Avoid an assertion failure when processing DNS replies without the
22999 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
23000 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
23001 0.2.4.15-rc. Found by stem integration tests.
23004 - Fix an invalid memory read that occurred when a pluggable
23005 transport proxy failed its configuration protocol.
23006 Fixes bug 9288; bugfix on 0.2.4.1-alpha.
23007 - When evaluating whether to use a connection that we haven't
23008 decided is canonical using a recent link protocol version,
23009 decide that it's canonical only if it used address _does_
23010 match the desired address. Fixes bug 9309; bugfix on
23011 0.2.4.4-alpha. Reported by skruffy.
23012 - Make the default behavior of NumDirectoryGuards be to track
23013 NumEntryGuards. Now a user who changes only NumEntryGuards will get
23014 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
23015 - Fix a spurious compilation warning with some older versions of
23016 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
23019 - Update to the July 3 2013 Maxmind GeoLite Country database.
23022 Changes in version 0.2.4.15-rc - 2013-07-01
23023 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
23024 series. It fixes a few smaller bugs, but generally appears stable.
23025 Please test it and let us know whether it is!
23028 - When receiving a new configuration file via the control port's
23029 LOADCONF command, do not treat the defaults file as absent.
23030 Fixes bug 9122; bugfix on 0.2.3.9-alpha.
23033 - Issue a warning when running with the bufferevents backend enabled.
23034 It's still not stable, and people should know that they're likely
23035 to hit unexpected problems. Closes ticket 9147.
23038 Changes in version 0.2.4.14-alpha - 2013-06-18
23039 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
23040 present in 0.2.4.13-alpha.
23043 - When we have too much memory queued in circuits (according to a new
23044 MaxMemInCellQueues option), close the circuits consuming the most
23045 memory. This prevents us from running out of memory as a relay if
23046 circuits fill up faster than they can be drained. Fixes bug 9063;
23047 bugfix on the 54th commit of Tor. This bug is a further fix beyond
23048 bug 6252, whose fix was merged into 0.2.3.21-rc.
23050 This change also fixes an earlier approach taken in 0.2.4.13-alpha,
23051 where we tried to solve this issue simply by imposing an upper limit
23052 on the number of queued cells for a single circuit. That approach
23053 proved to be problematic, since there are ways to provoke clients to
23054 send a number of cells in excess of any such reasonable limit. Fixes
23055 bug 9072; bugfix on 0.2.4.13-alpha.
23057 - Limit hidden service descriptors to at most ten introduction
23058 points, to slow one kind of guard enumeration. Fixes bug 9002;
23059 bugfix on 0.1.1.11-alpha.
23062 Changes in version 0.2.4.13-alpha - 2013-06-14
23063 Tor 0.2.4.13-alpha fixes a variety of potential remote crash
23064 vulnerabilities, makes socks5 username/password circuit isolation
23065 actually actually work (this time for sure!), and cleans up a bunch
23066 of other issues in preparation for a release candidate.
23068 o Major bugfixes (robustness):
23069 - Close any circuit that has too many cells queued on it. Fixes
23070 bug 9063; bugfix on the 54th commit of Tor. This bug is a further
23071 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
23072 - Prevent the get_freelists() function from running off the end of
23073 the list of freelists if it somehow gets an unrecognized
23074 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
23076 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
23077 when an exit connection with optimistic data succeeds immediately
23078 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
23080 - Fix a directory authority crash bug when building a consensus
23081 using an older consensus as its basis. Fixes bug 8833. Bugfix
23085 - Avoid a memory leak where we would leak a consensus body when we
23086 find that a consensus which we couldn't previously verify due to
23087 missing certificates is now verifiable. Fixes bug 8719; bugfix
23089 - We used to always request authority certificates by identity digest,
23090 meaning we'd get the newest one even when we wanted one with a
23091 different signing key. Then we would complain about being given
23092 a certificate we already had, and never get the one we really
23093 wanted. Now we use the "fp-sk/" resource as well as the "fp/"
23094 resource to request the one we want. Fixes bug 5595; bugfix on
23096 - Follow the socks5 protocol when offering username/password
23097 authentication. The fix for bug 8117 exposed this bug, and it
23098 turns out real-world applications like Pidgin do care. Bugfix on
23099 0.2.3.2-alpha; fixes bug 8879.
23100 - Prevent failures on Windows Vista and later when rebuilding the
23101 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
23102 bugfix on 0.2.4.12-alpha.
23105 - Fix an impossible buffer overrun in the AES unit tests. Fixes
23106 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
23107 - If for some reason we fail to write a microdescriptor while
23108 rebuilding the cache, do not let the annotations from that
23109 microdescriptor linger in the cache file, and do not let the
23110 microdescriptor stay recorded as present in its old location.
23111 Fixes bug 9047; bugfix on 0.2.2.6-alpha.
23112 - Fix a memory leak that would occur whenever a configuration
23113 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
23114 - Paste the description for PathBias parameters from the man
23115 page into or.h, so the code documents them too. Fixes bug 7982;
23116 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
23117 - Relays now treat a changed IPv6 ORPort as sufficient reason to
23118 publish an updated descriptor. Fixes bug 6026; bugfix on
23120 - When launching a resolve request on behalf of an AF_UNIX control
23121 socket, omit the address field of the new entry connection, used in
23122 subsequent controller events, rather than letting tor_dup_addr()
23123 set it to "<unknown address type>". Fixes bug 8639; bugfix on
23126 o Minor bugfixes (log messages):
23127 - Fix a scaling issue in the path bias accounting code that
23128 resulted in "Bug:" log messages from either
23129 pathbias_scale_close_rates() or pathbias_count_build_success().
23130 This represents a bugfix on a previous bugfix: the original fix
23131 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
23133 - Give a less useless error message when the user asks for an IPv4
23134 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
23138 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
23139 to tolerate bug 8093 for now.
23140 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
23141 in directory authority votes to describe whether they have enough
23142 measured bandwidths to ignore advertised (relay descriptor)
23143 bandwidth claims. Resolves ticket 8711.
23144 - Update to the June 5 2013 Maxmind GeoLite Country database.
23146 o Removed documentation:
23147 - Remove some of the older contents of doc/ as obsolete; move others
23148 to torspec.git. Fixes bug 8965.
23150 o Code simplification and refactoring:
23151 - Avoid using character buffers when constructing most directory
23152 objects: this approach was unwieldy and error-prone. Instead,
23153 build smartlists of strings, and concatenate them when done.
23156 Changes in version 0.2.4.12-alpha - 2013-04-18
23157 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
23158 process for lengthening the guard rotation period, makes directory
23159 authority opinions in the consensus a bit less gameable, makes socks5
23160 username/password circuit isolation actually work, and fixes a wide
23161 variety of other issues.
23164 - Raise the default time that a client keeps an entry guard from
23165 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
23166 2012 paper. (We would make it even longer, but we need better client
23167 load balancing first.) Also, make the guard lifetime controllable
23168 via a new GuardLifetime torrc option and a GuardLifetime consensus
23169 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
23170 - Directory authorities now prefer using measured bandwidths to
23171 advertised ones when computing flags and thresholds. Resolves
23173 - Directory authorities that have more than a threshold number
23174 of relays with measured bandwidths now treat relays with unmeasured
23175 bandwidths as having bandwidth 0. Resolves ticket 8435.
23177 o Major bugfixes (assert / resource use):
23178 - Avoid a bug where our response to TLS renegotiation under certain
23179 network conditions could lead to a busy-loop, with 100% CPU
23180 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
23181 - Avoid an assertion when we discover that we'd like to write a cell
23182 onto a closing connection: just discard the cell. Fixes another
23183 case of bug 7350; bugfix on 0.2.4.4-alpha.
23185 o Major bugfixes (client-side privacy):
23186 - When we mark a circuit as unusable for new circuits, have it
23187 continue to be unusable for new circuits even if MaxCircuitDirtiness
23188 is increased too much at the wrong time, or the system clock jumps
23189 backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
23190 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
23191 which have resolved to internal addresses") is set, apply that
23192 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
23193 - When an exit relay rejects a stream with reason "exit policy", but
23194 we only know an exit policy summary (e.g. from the microdesc
23195 consensus) for it, do not mark the relay as useless for all exiting.
23196 Instead, mark just the circuit as unsuitable for that particular
23197 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
23198 - Allow applications to get proper stream isolation with
23199 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
23200 username/password authentication also offer "no authentication". Tor
23201 had previously preferred "no authentication", so the applications
23202 never actually sent Tor their auth details. Now Tor selects
23203 username/password authentication if it's offered. You can disable
23204 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
23205 bug 8117; bugfix on 0.2.3.3-alpha.
23207 o Major bugfixes (other):
23208 - When unable to find any working directory nodes to use as a
23209 directory guard, give up rather than adding the same non-working
23210 nodes to the directory guard list over and over. Fixes bug 8231;
23211 bugfix on 0.2.4.8-alpha.
23214 - Reject as invalid most directory objects containing a NUL.
23215 Belt-and-suspender fix for bug 8037.
23216 - In our testsuite, create temporary directories with a bit more
23217 entropy in their name to make name collisions less likely. Fixes
23219 - Add CACHED keyword to ADDRMAP events in the control protocol
23220 to indicate whether a DNS result will be cached or not. Resolves
23222 - Update to the April 3 2013 Maxmind GeoLite Country database.
23224 o Minor features (build):
23225 - Detect and reject attempts to build Tor with threading support
23226 when OpenSSL has been compiled without threading support.
23228 - Clarify that when autoconf is checking for nacl, it is checking
23229 specifically for nacl with a fast curve25519 implementation.
23231 - Warn if building on a platform with an unsigned time_t: there
23232 are too many places where Tor currently assumes that time_t can
23233 hold negative values. We'd like to fix them all, but probably
23236 o Minor bugfixes (build):
23237 - Fix some bugs in tor-fw-helper-natpmp when trying to build and
23238 run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
23239 Fixes bug 7280; bugfix on 0.2.3.1-alpha.
23240 - Add the old src/or/micro-revision.i filename to CLEANFILES.
23241 On the off chance that somebody has one, it will go away as soon
23242 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
23243 - Build Tor correctly on 32-bit platforms where the compiler can build
23244 but not run code using the "uint128_t" construction. Fixes bug 8587;
23245 bugfix on 0.2.4.8-alpha.
23246 - Fix compilation warning with some versions of clang that would
23247 prefer the -Wswitch-enum compiler flag to warn about switch
23248 statements with missing enum values, even if those switch
23249 statements have a "default:" statement. Fixes bug 8598; bugfix
23252 o Minor bugfixes (protocol):
23253 - Fix the handling of a TRUNCATE cell when it arrives while the
23254 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
23255 - Fix a misframing issue when reading the version numbers in a
23256 VERSIONS cell. Previously we would recognize [00 01 00 02] as
23257 'version 1, version 2, and version 0x100', when it should have
23258 only included versions 1 and 2. Fixes bug 8059; bugfix on
23259 0.2.0.10-alpha. Reported pseudonymously.
23260 - Make the format and order of STREAM events for DNS lookups
23261 consistent among the various ways to launch DNS lookups. Fixes
23262 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
23263 - Correct our check for which versions of Tor support the EXTEND2
23264 cell. We had been willing to send it to Tor 0.2.4.7-alpha and
23265 later, when support was really added in version 0.2.4.8-alpha.
23266 Fixes bug 8464; bugfix on 0.2.4.8-alpha.
23268 o Minor bugfixes (other):
23269 - Correctly store microdescriptors and extrainfo descriptors with
23270 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
23271 Bug reported by "cypherpunks".
23272 - Increase the width of the field used to remember a connection's
23273 link protocol version to two bytes. Harmless for now, since the
23274 only currently recognized versions are one byte long. Reported
23275 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
23276 - If the state file's path bias counts are invalid (presumably from a
23277 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
23278 additional checks and log messages to the scaling of Path Bias
23279 counts, in case there still are remaining issues with scaling.
23280 Should help resolve bug 8235.
23281 - Eliminate several instances where we use "Nickname=ID" to refer to
23282 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
23283 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
23284 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
23286 o Minor bugfixes (syscalls):
23287 - Always check the return values of functions fcntl() and
23288 setsockopt(). We don't believe these are ever actually failing in
23289 practice, but better safe than sorry. Also, checking these return
23290 values should please analysis tools like Coverity. Patch from
23291 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
23292 - Use direct writes rather than stdio when building microdescriptor
23293 caches, in an attempt to mitigate bug 8031, or at least make it
23296 o Minor bugfixes (config):
23297 - When rejecting a configuration because we were unable to parse a
23298 quoted string, log an actual error message. Fixes bug 7950; bugfix
23300 - Behave correctly when the user disables LearnCircuitBuildTimeout
23301 but doesn't tell us what they would like the timeout to be. Fixes
23302 bug 6304; bugfix on 0.2.2.14-alpha.
23303 - When autodetecting the number of CPUs, use the number of available
23304 CPUs in preference to the number of configured CPUs. Inform the
23305 user if this reduces the number of available CPUs. Fixes bug 8002;
23306 bugfix on 0.2.3.1-alpha.
23307 - Make it an error when you set EntryNodes but disable UseGuardNodes,
23308 since it will (surprisingly to some users) ignore EntryNodes. Fixes
23309 bug 8180; bugfix on 0.2.3.11-alpha.
23310 - Allow TestingTorNetworks to override the 4096-byte minimum for
23311 the Fast threshold. Otherwise they can't bootstrap until they've
23312 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
23313 - Fix some logic errors when the user manually overrides the
23314 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
23317 o Minor bugfixes (log messages to help diagnose bugs):
23318 - If we fail to free a microdescriptor because of bug 7164, log
23319 the filename and line number from which we tried to free it.
23320 - Add another diagnostic to the heartbeat message: track and log
23321 overhead that TLS is adding to the data we write. If this is
23322 high, we are sending too little data to SSL_write at a time.
23323 Diagnostic for bug 7707.
23324 - Add more detail to a log message about relaxed timeouts, to help
23326 - Warn more aggressively when flushing microdescriptors to a
23327 microdescriptor cache fails, in an attempt to mitigate bug 8031,
23328 or at least make it more diagnosable.
23329 - Improve debugging output to help track down bug 8185 ("Bug:
23330 outgoing relay cell has n_chan==NULL. Dropping.")
23331 - Log the purpose of a path-bias testing circuit correctly.
23332 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
23334 o Minor bugfixes (0.2.4.x log messages that were too noisy):
23335 - Don't attempt to relax the timeout of already opened 1-hop circuits.
23336 They might never timeout. This should eliminate some/all cases of
23337 the relaxed timeout log message.
23338 - Use circuit creation time for network liveness evaluation. This
23339 should eliminate warning log messages about liveness caused
23340 by changes in timeout evaluation. Fixes bug 6572; bugfix on
23342 - Reduce a path bias length check from notice to info. The message
23343 is triggered when creating controller circuits. Fixes bug 8196;
23344 bugfix on 0.2.4.8-alpha.
23345 - Fix a path state issue that triggered a notice during relay startup.
23346 Fixes bug 8320; bugfix on 0.2.4.10-alpha.
23347 - Reduce occurrences of warns about circuit purpose in
23348 connection_ap_expire_building(). Fixes bug 8477; bugfix on
23351 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
23352 - If we encounter a write failure on a SOCKS connection before we
23353 finish our SOCKS handshake, don't warn that we closed the
23354 connection before we could send a SOCKS reply. Fixes bug 8427;
23355 bugfix on 0.1.0.1-rc.
23356 - Correctly recognize that [::1] is a loopback address. Fixes
23357 bug 8377; bugfix on 0.2.1.3-alpha.
23358 - Fix a directory authority warn caused when we have a large amount
23359 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
23360 - Don't log inappropriate heartbeat messages when hibernating: a
23361 hibernating node is _expected_ to drop out of the consensus,
23362 decide it isn't bootstrapped, and so forth. Fixes bug 7302;
23363 bugfix on 0.2.3.1-alpha.
23364 - Don't complain about bootstrapping problems while hibernating.
23365 These complaints reflect a general code problem, but not one
23366 with any problematic effects (no connections are actually
23367 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
23369 o Documentation fixes:
23370 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
23371 names match. Fixes bug 7768.
23372 - Make the torify manpage no longer refer to tsocks; torify hasn't
23373 supported tsocks since 0.2.3.14-alpha.
23374 - Make the tor manpage no longer reference tsocks.
23375 - Fix the GeoIPExcludeUnknown documentation to refer to
23376 ExcludeExitNodes rather than the currently nonexistent
23377 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
23380 - The tor-tsocks.conf is no longer distributed or installed. We
23381 recommend that tsocks users use torsocks instead. Resolves
23385 Changes in version 0.2.4.11-alpha - 2013-03-11
23386 Tor 0.2.4.11-alpha makes relay measurement by directory authorities
23387 more robust, makes hidden service authentication work again, and
23388 resolves a DPI fingerprint for Tor's SSL transport.
23390 o Major features (directory authorities):
23391 - Directory authorities now support a new consensus method (17)
23392 where they cap the published bandwidth of servers for which
23393 insufficient bandwidth measurements exist. Fixes part of bug 2286.
23394 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
23395 serve any v2 directory information. Now we can test disabling the
23396 old deprecated v2 directory format, and see whether doing so has
23397 any effect on network load. Begins to fix bug 6783.
23398 - Directory authorities now include inside each vote a statement of
23399 the performance thresholds they used when assigning flags.
23400 Implements ticket 8151.
23402 o Major bugfixes (directory authorities):
23403 - Stop marking every relay as having been down for one hour every
23404 time we restart a directory authority. These artificial downtimes
23405 were messing with our Stable and Guard flag calculations. Fixes
23406 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
23408 o Major bugfixes (hidden services):
23409 - Allow hidden service authentication to succeed again. When we
23410 refactored the hidden service introduction code back
23411 in 0.2.4.1-alpha, we didn't update the code that checks
23412 whether authentication information is present, causing all
23413 authentication checks to return "false". Fix for bug 8207; bugfix
23414 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
23416 o Minor features (relays, bridges):
23417 - Make bridge relays check once a minute for whether their IP
23418 address has changed, rather than only every 15 minutes. Resolves
23419 bugs 1913 and 1992.
23420 - Refactor resolve_my_address() so it returns the method by which we
23421 decided our public IP address (explicitly configured, resolved from
23422 explicit hostname, guessed from interfaces, learned by gethostname).
23423 Now we can provide more helpful log messages when a relay guesses
23424 its IP address incorrectly (e.g. due to unexpected lines in
23425 /etc/hosts). Resolves ticket 2267.
23426 - Teach bridge-using clients to avoid 0.2.2 bridges when making
23427 microdescriptor-related dir requests, and only fall back to normal
23428 descriptors if none of their bridges can handle microdescriptors
23429 (as opposed to the fix in ticket 4013, which caused them to fall
23430 back to normal descriptors if *any* of their bridges preferred
23431 them). Resolves ticket 4994.
23432 - Randomize the lifetime of our SSL link certificate, so censors can't
23433 use the static value for filtering Tor flows. Resolves ticket 8443;
23434 related to ticket 4014 which was included in 0.2.2.33.
23435 - Support a new version of the link protocol that allows 4-byte circuit
23436 IDs. Previously, circuit IDs were limited to 2 bytes, which presented
23437 a possible resource exhaustion issue. Closes ticket 7351; implements
23440 o Minor features (portability):
23441 - Tweak the curve25519-donna*.c implementations to tolerate systems
23442 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
23443 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
23444 the signs of types during autoconf. This is better than our old
23445 approach, which didn't work when cross-compiling.
23446 - Detect the sign of enum values, rather than assuming that MSC is the
23447 only compiler where enum types are all signed. Fixes bug 7727;
23448 bugfix on 0.2.4.10-alpha.
23450 o Minor features (other):
23451 - Say "KBytes" rather than "KB" in the man page (for various values
23452 of K), to further reduce confusion about whether Tor counts in
23453 units of memory or fractions of units of memory. Resolves ticket 7054.
23454 - Clear the high bit on curve25519 public keys before passing them to
23455 our backend, in case we ever wind up using a backend that doesn't do
23456 so itself. If we used such a backend, and *didn't* clear the high bit,
23457 we could wind up in a situation where users with such backends would
23458 be distinguishable from users without. Fixes bug 8121; bugfix on
23460 - Update to the March 6 2013 Maxmind GeoLite Country database.
23462 o Minor bugfixes (clients):
23463 - When we receive a RELAY_END cell with the reason DONE, or with no
23464 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
23465 status as "connection refused". Previously we reported these cases
23466 as success but then immediately closed the connection. Fixes bug
23467 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
23468 - Downgrade an assertion in connection_ap_expire_beginning to an
23469 LD_BUG message. The fix for bug 8024 should prevent this message
23470 from displaying, but just in case, a warn that we can diagnose
23471 is better than more assert crashes. Fixes bug 8065; bugfix on
23473 - Lower path use bias thresholds to .80 for notice and .60 for warn.
23474 Also make the rate limiting flags for the path use bias log messages
23475 independent from the original path bias flags. Fixes bug 8161;
23476 bugfix on 0.2.4.10-alpha.
23478 o Minor bugfixes (relays):
23479 - Stop trying to resolve our hostname so often (e.g. every time we
23480 think about doing a directory fetch). Now we reuse the cached
23481 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
23482 and 2410 (bugfix on 0.1.2.2-alpha).
23483 - Stop sending a stray "(null)" in some cases for the server status
23484 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
23486 - When choosing which stream on a formerly stalled circuit to wake
23487 first, make better use of the platform's weak RNG. Previously,
23488 we had been using the % ("modulo") operator to try to generate a
23489 1/N chance of picking each stream, but this behaves badly with
23490 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
23492 - Use our own weak RNG when we need a weak RNG. Windows's rand() and
23493 Irix's random() only return 15 bits; Solaris's random() returns more
23494 bits but its RAND_MAX says it only returns 15, and so on. Motivated
23495 by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
23497 o Minor bugfixes (directory authorities):
23498 - Directory authorities now use less space when formatting identical
23499 microdescriptor lines in directory votes. Fixes bug 8158; bugfix
23502 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
23503 - Avoid leaking memory if we fail to compute a consensus signature
23504 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
23505 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
23507 - Fix a memory leak during safe-cookie controller authentication.
23508 Bugfix on 0.2.3.13-alpha.
23509 - Avoid memory leak of IPv6 policy content if we fail to format it into
23510 a router descriptor. Bugfix on 0.2.4.7-alpha.
23512 o Minor bugfixes (other code correctness issues):
23513 - Avoid a crash if we fail to generate an extrainfo descriptor.
23514 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
23515 this is CID 718634.
23516 - When detecting the largest possible file descriptor (in order to
23517 close all file descriptors when launching a new program), actually
23518 use _SC_OPEN_MAX. The old code for doing this was very, very broken.
23519 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
23521 - Fix a copy-and-paste error when adding a missing A1 to a routerset
23522 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
23523 Bugfix on 0.2.4.10-alpha.
23524 - Fix an impossible-to-trigger integer overflow when estimating how
23525 long our onionskin queue would take. (This overflow would require us
23526 to accept 4 million onionskins before processing 100 of them.) Fixes
23527 bug 8210; bugfix on 0.2.4.10-alpha.
23529 o Code simplification and refactoring:
23530 - Add a wrapper function for the common "log a message with a
23534 Changes in version 0.2.4.10-alpha - 2013-02-04
23535 Tor 0.2.4.10-alpha adds defenses at the directory authority level from
23536 certain attacks that flood the network with relays; changes the queue
23537 for circuit create requests from a sized-based limit to a time-based
23538 limit; resumes building with MSVC on Windows; and fixes a wide variety
23541 o Major bugfixes (directory authority):
23542 - When computing directory thresholds, ignore any rejected-as-sybil
23543 nodes during the computation so that they can't influence Fast,
23544 Guard, etc. (We should have done this for proposal 109.) Fixes
23546 - When marking a node as a likely sybil, reset its uptime metrics
23547 to zero, so that it cannot time towards getting marked as Guard,
23548 Stable, or HSDir. (We should have done this for proposal 109.) Fixes
23552 - When a TLS write is partially successful but incomplete, remember
23553 that the flushed part has been flushed, and notice that bytes were
23554 actually written. Reported and fixed pseudonymously. Fixes bug
23555 7708; bugfix on Tor 0.1.0.5-rc.
23556 - Reject bogus create and relay cells with 0 circuit ID or 0 stream
23557 ID: these could be used to create unexpected streams and circuits
23558 which would count as "present" to some parts of Tor but "absent"
23559 to others, leading to zombie circuits and streams or to a bandwidth
23560 denial-of-service. Fixes bug 7889; bugfix on every released version
23561 of Tor. Reported by "oftc_must_be_destroyed".
23562 - Rename all macros in our local copy of queue.h to begin with "TOR_".
23563 This change seems the only good way to permanently prevent conflicts
23564 with queue.h on various operating systems. Fixes bug 8107; bugfix
23567 o Major features (relay):
23568 - Instead of limiting the number of queued onionskins (aka circuit
23569 create requests) to a fixed, hard-to-configure number, we limit
23570 the size of the queue based on how many we expect to be able to
23571 process in a given amount of time. We estimate the time it will
23572 take to process an onionskin based on average processing time
23573 of previous onionskins. Closes ticket 7291. You'll never have to
23574 configure MaxOnionsPending again.
23576 o Major features (portability):
23577 - Resume building correctly with MSVC and Makefile.nmake. This patch
23578 resolves numerous bugs and fixes reported by ultramage, including
23579 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
23580 - Make the ntor and curve25519 code build correctly with MSVC.
23581 Fix on 0.2.4.8-alpha.
23584 - When directory authorities are computing thresholds for flags,
23585 never let the threshold for the Fast flag fall below 4096
23586 bytes. Also, do not consider nodes with extremely low bandwidths
23587 when deciding thresholds for various directory flags. This change
23588 should raise our threshold for Fast relays, possibly in turn
23589 improving overall network performance; see ticket 1854. Resolves
23591 - The Tor client now ignores sub-domain components of a .onion
23592 address. This change makes HTTP "virtual" hosting
23593 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
23594 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
23595 hosted on the same hidden service. Implements proposal 204.
23596 - We compute the overhead from passing onionskins back and forth to
23597 cpuworkers, and report it when dumping statistics in response to
23598 SIGUSR1. Supports ticket 7291.
23600 o Minor features (path selection):
23601 - When deciding whether we have enough descriptors to build circuits,
23602 instead of looking at raw relay counts, look at which fraction
23603 of (bandwidth-weighted) paths we're able to build. This approach
23604 keeps clients from building circuits if their paths are likely to
23605 stand out statistically. The default fraction of paths needed is
23606 taken from the consensus directory; you can override it with the
23607 new PathsNeededToBuildCircuits option. Fixes ticket 5956.
23608 - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
23609 and we have GeoIP information, also exclude all nodes with unknown
23610 countries "??" and "A1". This behavior is controlled by the
23611 new GeoIPExcludeUnknown option: you can make such nodes always
23612 excluded with "GeoIPExcludeUnknown 1", and disable the feature
23613 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
23614 gets you the default behavior. Implements feature 7706.
23615 - Path Use Bias: Perform separate accounting for successful circuit
23616 use. Keep separate statistics on stream attempt rates versus stream
23617 success rates for each guard. Provide configurable thresholds to
23618 determine when to emit log messages or disable use of guards that
23619 fail too many stream attempts. Resolves ticket 7802.
23621 o Minor features (log messages):
23622 - When learning a fingerprint for a bridge, log its corresponding
23623 transport type. Implements ticket 7896.
23624 - Improve the log message when "Bug/attack: unexpected sendme cell
23625 from client" occurs, to help us track bug 8093.
23628 - Remove a couple of extraneous semicolons that were upsetting the
23629 cparser library. Patch by Christian Grothoff. Fixes bug 7115;
23630 bugfix on 0.2.2.1-alpha.
23631 - Remove a source of rounding error during path bias count scaling;
23632 don't count cannibalized circuits as used for path bias until we
23633 actually try to use them; and fix a circuit_package_relay_cell()
23634 warning message about n_chan==NULL. Fixes bug 7802.
23635 - Detect nacl when its headers are in a nacl/ subdirectory. Also,
23636 actually link against nacl when we're configured to use it. Fixes
23637 bug 7972; bugfix on 0.2.4.8-alpha.
23638 - Compile correctly with the --disable-curve25519 option. Fixes
23639 bug 8153; bugfix on 0.2.4.8-alpha.
23641 o Build improvements:
23642 - Do not report status verbosely from autogen.sh unless the -v flag
23643 is specified. Fixes issue 4664. Patch from Onizuka.
23644 - Replace all calls to snprintf() outside of src/ext with
23645 tor_snprintf(). Also remove the #define to replace snprintf with
23646 _snprintf on Windows; they have different semantics, and all of
23647 our callers should be using tor_snprintf() anyway. Fixes bug 7304.
23648 - Try to detect if we are ever building on a platform where
23649 memset(...,0,...) does not set the value of a double to 0.0. Such
23650 platforms are permitted by the C standard, though in practice
23651 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
23652 currently support them, but it's better to detect them and fail
23653 than to perform erroneously.
23655 o Removed features:
23656 - Stop exporting estimates of v2 and v3 directory traffic shares
23657 in extrainfo documents. They were unneeded and sometimes inaccurate.
23658 Also stop exporting any v2 directory request statistics. Resolves
23660 - Drop support for detecting and warning about versions of Libevent
23661 before 1.3e. Nothing reasonable ships with them any longer;
23662 warning the user about them shouldn't be needed. Resolves ticket
23665 o Code simplifications and refactoring:
23666 - Rename "isin" functions to "contains", for grammar. Resolves
23668 - Rename Tor's logging function log() to tor_log(), to avoid conflicts
23669 with the natural logarithm function from the system libm. Resolves
23673 Changes in version 0.2.4.9-alpha - 2013-01-15
23674 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
23675 work more robustly.
23678 - Fix backward compatibility logic when receiving an embedded ntor
23679 handshake tunneled in a CREATE cell. This clears up the "Bug:
23680 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
23684 Changes in version 0.2.4.8-alpha - 2013-01-14
23685 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
23686 risks, adds a new stronger and faster circuit handshake, and offers
23687 stronger and faster link encryption when both sides support it.
23690 - Preliminary support for directory guards (proposal 207): when
23691 possible, clients now use their entry guards for non-anonymous
23692 directory requests. This can help prevent client enumeration. Note
23693 that this behavior only works when we have a usable consensus
23694 directory, and when options about what to download are more or less
23695 standard. In the future we should re-bootstrap from our guards,
23696 rather than re-bootstrapping from the preconfigured list of
23697 directory sources that ships with Tor. Resolves ticket 6526.
23698 - Tor relays and clients now support a better CREATE/EXTEND cell
23699 format, allowing the sender to specify multiple address, identity,
23700 and handshake types. Implements Robert Ransom's proposal 200;
23701 closes ticket 7199.
23703 o Major features (new circuit handshake):
23704 - Tor now supports a new circuit extension handshake designed by Ian
23705 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
23706 circuit extension handshake, later called "TAP", was a bit slow
23707 (especially on the relay side), had a fragile security proof, and
23708 used weaker keys than we'd now prefer. The new circuit handshake
23709 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
23710 function, making it significantly more secure than the older
23711 handshake, and significantly faster. Tor can use one of two built-in
23712 pure-C curve25519-donna implementations by Adam Langley, or it
23713 can link against the "nacl" library for a tuned version if present.
23715 The built-in version is very fast for 64-bit systems when building
23716 with GCC. The built-in 32-bit version is still faster than the
23717 old TAP protocol, but using libnacl is better on most such hosts.
23719 Clients don't currently use this protocol by default, since
23720 comparatively few clients support it so far. To try it, set
23721 UseNTorHandshake to 1.
23723 Implements proposal 216; closes ticket 7202.
23725 o Major features (better link encryption):
23726 - Relays can now enable the ECDHE TLS ciphersuites when available
23727 and appropriate. These ciphersuites let us negotiate forward-secure
23728 TLS secret keys more safely and more efficiently than with our
23729 previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
23730 public relays prefer the (faster) P224 group, and bridges prefer
23731 the (more common) P256 group; you can override this with the
23734 Enabling these ciphers was a little tricky, since for a long time,
23735 clients had been claiming to support them without actually doing
23736 so, in order to foil fingerprinting. But with the client-side
23737 implementation of proposal 198 in 0.2.3.17-beta, clients can now
23738 match the ciphers from recent Firefox versions *and* list the
23739 ciphers they actually mean, so relays can believe such clients
23740 when they advertise ECDHE support in their TLS ClientHello messages.
23742 This feature requires clients running 0.2.3.17-beta or later,
23743 and requires both sides to be running OpenSSL 1.0.0 or later
23744 with ECC support. OpenSSL 1.0.1, with the compile-time option
23745 "enable-ec_nistp_64_gcc_128", is highly recommended.
23747 Implements the relay side of proposal 198; closes ticket 7200.
23750 - Avoid crashing when, as a relay without IPv6-exit support, a
23751 client insists on getting an IPv6 address or nothing. Fixes bug
23752 7814; bugfix on 0.2.4.7-alpha.
23755 - Improve circuit build timeout handling for hidden services.
23756 In particular: adjust build timeouts more accurately depending
23757 upon the number of hop-RTTs that a particular circuit type
23758 undergoes. Additionally, launch intro circuits in parallel
23759 if they timeout, and take the first one to reply as valid.
23760 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
23761 separate error codes; or at least, don't break for that reason.
23762 Fixes bug 7935. Reported by "oftc_must_be_destroyed".
23763 - Update to the January 2 2013 Maxmind GeoLite Country database.
23765 o Minor features (testing):
23766 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
23767 (P-256) Diffie-Hellman handshakes to src/or/bench.
23768 - Add benchmark functions to test onion handshake performance.
23770 o Minor features (path bias detection):
23771 - Alter the Path Bias log messages to be more descriptive in terms
23772 of reporting timeouts and other statistics.
23773 - Create three levels of Path Bias log messages, as opposed to just
23774 two. These are configurable via consensus as well as via the torrc
23775 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
23776 The default values are 0.70, 0.50, and 0.30 respectively.
23777 - Separate the log message levels from the decision to drop guards,
23778 which also is available via torrc option PathBiasDropGuards.
23779 PathBiasDropGuards still defaults to 0 (off).
23780 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
23781 in combination with PathBiasExtremeRate.
23782 - Increase the default values for PathBiasScaleThreshold and
23783 PathBiasCircThreshold from (200, 20) to (300, 150).
23784 - Add in circuit usage accounting to path bias. If we try to use a
23785 built circuit but fail for any reason, it counts as path bias.
23786 Certain classes of circuits where the adversary gets to pick your
23787 destination node are exempt from this accounting. Usage accounting
23788 can be specifically disabled via consensus parameter or torrc.
23789 - Convert all internal path bias state to double-precision floating
23790 point, to avoid roundoff error and other issues.
23791 - Only record path bias information for circuits that have completed
23792 *two* hops. Assuming end-to-end tagging is the attack vector, this
23793 makes us more resilient to ambient circuit failure without any
23794 detection capability loss.
23796 o Minor bugfixes (log messages):
23797 - Rate-limit the "No circuits are opened. Relaxed timeout for a
23798 circuit with channel state open..." message to once per hour to
23799 keep it from filling the notice logs. Mitigates bug 7799 but does
23800 not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
23801 - Avoid spurious warnings when configuring multiple client ports of
23802 which only some are nonlocal. Previously, we had claimed that some
23803 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
23806 o Code simplifications and refactoring:
23807 - Get rid of a couple of harmless clang warnings, where we compared
23808 enums to ints. These warnings are newly introduced in clang 3.2.
23809 - Split the onion.c file into separate modules for the onion queue
23810 and the different handshakes it supports.
23811 - Remove the marshalling/unmarshalling code for sending requests to
23812 cpuworkers over a socket, and instead just send structs. The
23813 recipient will always be the same Tor binary as the sender, so
23814 any encoding is overkill.
23817 Changes in version 0.2.4.7-alpha - 2012-12-24
23818 Tor 0.2.4.7-alpha introduces a new approach to providing fallback
23819 directory mirrors for more robust bootstrapping; fixes more issues where
23820 clients with changing network conditions refuse to make any circuits;
23821 adds initial support for exiting to IPv6 addresses; resumes being able
23822 to update our GeoIP database, and includes the geoip6 file this time;
23823 turns off the client-side DNS cache by default due to privacy risks;
23824 and fixes a variety of other issues.
23826 o Major features (client resilience):
23827 - Add a new "FallbackDir" torrc option to use when we can't use
23828 a directory mirror from the consensus (either because we lack a
23829 consensus, or because they're all down). Currently, all authorities
23830 are fallbacks by default, and there are no other default fallbacks,
23831 but that will change. This option will allow us to give clients a
23832 longer list of servers to try to get a consensus from when first
23833 connecting to the Tor network, and thereby reduce load on the
23834 directory authorities. Implements proposal 206, "Preconfigured
23835 directory sources for bootstrapping". We also removed the old
23836 "FallbackNetworkstatus" option, since we never got it working well
23837 enough to use it. Closes bug 572.
23838 - If we have no circuits open, use a relaxed timeout (the
23839 95-percentile cutoff) until a circuit succeeds. This heuristic
23840 should allow Tor to succeed at building circuits even when the
23841 network connection drastically changes. Should help with bug 3443.
23843 o Major features (IPv6):
23844 - Relays can now exit to IPv6 addresses: make sure that you have IPv6
23845 connectivity, then set the IPv6Exit flag to 1. Also make sure your
23846 exit policy reads as you would like: the address * applies to all
23847 address families, whereas *4 is IPv4 address only, and *6 is IPv6
23848 addresses only. On the client side, you'll need to wait until the
23849 authorities have upgraded, wait for enough exits to support IPv6,
23850 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
23851 ticket 5547, implements proposal 117 as revised in proposal 208.
23853 We DO NOT recommend that clients with actual anonymity needs start
23854 using IPv6 over Tor yet, since not enough exits support it yet.
23856 o Major features (geoip database):
23857 - Maxmind began labelling Tor relays as being in country "A1",
23858 which breaks by-country node selection inside Tor. Now we use a
23859 script to replace "A1" ("Anonymous Proxy") entries in our geoip
23860 file with real country codes. This script fixes about 90% of "A1"
23861 entries automatically and uses manual country code assignments to
23862 fix the remaining 10%. See src/config/README.geoip for details.
23863 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
23864 Country database, as modified above.
23866 o Major bugfixes (client-side DNS):
23867 - Turn off the client-side DNS cache by default. Updating and using
23868 the DNS cache is now configurable on a per-client-port
23869 level. SOCKSPort, DNSPort, etc lines may now contain
23870 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
23871 cache these types of DNS answers when we receive them from an
23872 exit node in response to an application request on this port, and
23873 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
23874 cached DNS answers of these types, we shouldn't use them. It's
23875 potentially risky to use cached DNS answers at the client, since
23876 doing so can indicate to one exit what answers we've gotten
23877 for DNS lookups in the past. With IPv6, this becomes especially
23878 problematic. Using cached DNS answers for requests on the same
23879 circuit would present less linkability risk, since all traffic
23880 on a circuit is already linkable, but it would also provide
23881 little performance benefit: the exit node caches DNS replies
23882 too. Implements a simplified version of Proposal 205. Implements
23885 o Major bugfixes (other):
23886 - Alter circuit build timeout measurement to start at the point
23887 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
23888 initialization). This should make our timeout measurements more
23889 uniform. Previously, we were sometimes including ORconn setup time
23890 in our circuit build time measurements. Should resolve bug 3443.
23891 - Fix an assertion that could trigger in hibernate_go_dormant() when
23892 closing an or_connection_t: call channel_mark_for_close() rather
23893 than connection_mark_for_close(). Fixes bug 7267. Bugfix on
23895 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
23896 7655; bugfix on 0.2.4.6-alpha.
23899 - Add a new torrc option "ServerTransportListenAddr" to let bridge
23900 operators select the address where their pluggable transports will
23901 listen for connections. Resolves ticket 7013.
23902 - Allow an optional $ before the node identity digest in the
23903 controller command GETINFO ns/id/<identity>, for consistency with
23904 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
23905 - Log packaged cell fullness as part of the heartbeat message.
23906 Diagnosis to try to determine the extent of bug 7743.
23908 o Minor features (IPv6):
23909 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
23910 prefer to hand out virtual IPv6 addresses, since there are more of
23911 them and we can't run out. To override this behavior and make IPv4
23912 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
23913 or DNSPort you're using for resolving. Implements ticket 7571.
23914 - AutomapHostsOnResolve responses are now randomized, to avoid
23915 annoying situations where Tor is restarted and applications
23916 connect to the wrong addresses.
23917 - Never try more than 1000 times to pick a new virtual address when
23918 AutomapHostsOnResolve is set. That's good enough so long as we
23919 aren't close to handing out our entire virtual address space;
23920 if you're getting there, it's best to switch to IPv6 virtual
23924 - The ADDRMAP command can no longer generate an ill-formed error
23925 code on a failed MAPADDRESS. It now says "internal" rather than
23926 an English sentence fragment with spaces in the middle. Bugfix on
23927 Tor 0.2.0.19-alpha.
23928 - Fix log messages and comments to avoid saying "GMT" when we mean
23929 "UTC". Fixes bug 6113.
23930 - Compile on win64 using mingw64. Fixes bug 7260; patches from
23932 - Fix a crash when debugging unit tests on Windows: deallocate a
23933 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
23934 bugfix on 0.2.2.17-alpha. Reported by "ultramage".
23937 - The DirServer option is now DirAuthority, for consistency with
23938 current naming patterns. You can still use the old DirServer form.
23940 o Code simplification and refactoring:
23941 - Move the client-side address-map/virtual-address/DNS-cache code
23942 out of connection_edge.c into a new addressmap.c module.
23943 - Remove unused code for parsing v1 directories and "running routers"
23944 documents. Fixes bug 6887.
23947 Changes in version 0.2.3.25 - 2012-11-19
23948 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
23949 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
23950 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
23951 programmer, and friend. Unstinting in his dedication to the cause of
23952 freedom, he inspired and helped many of us as we began our work on
23953 anonymity, and inspires us still. Please honor his memory by writing
23954 software to protect people's freedoms, and by helping others to do so.
23956 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
23957 significantly reduced directory overhead (via microdescriptors),
23958 enormous crypto performance improvements for fast relays on new
23959 enough hardware, a new v3 TLS handshake protocol that can better
23960 resist fingerprinting, support for protocol obfuscation plugins (aka
23961 pluggable transports), better scalability for hidden services, IPv6
23962 support for bridges, performance improvements like allowing clients
23963 to skip the first round-trip on the circuit ("optimistic data") and
23964 refilling token buckets more often, a new "stream isolation" design
23965 to isolate different applications on different circuits, and many
23966 stability, security, and privacy fixes.
23969 - Tor tries to wipe potentially sensitive data after using it, so
23970 that if some subsequent security failure exposes Tor's memory,
23971 the damage will be limited. But we had a bug where the compiler
23972 was eliminating these wipe operations when it decided that the
23973 memory was no longer visible to a (correctly running) program,
23974 hence defeating our attempt at defense in depth. We fix that
23975 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
23976 is unlikely to optimize away. Future versions of Tor may use
23977 a less ridiculously heavy approach for this. Fixes bug 7352.
23978 Reported in an article by Andrey Karpov.
23981 - Fix a harmless bug when opting against publishing a relay descriptor
23982 because DisableNetwork is set. Fixes bug 7464; bugfix on
23986 Changes in version 0.2.4.6-alpha - 2012-11-13
23987 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
23988 makes our defense-in-depth memory wiping more reliable, and begins to
23989 count IPv6 addresses in bridge statistics,
23992 - Fix an assertion failure that could occur when closing a connection
23993 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
23995 - Tor tries to wipe potentially sensitive data after using it, so
23996 that if some subsequent security failure exposes Tor's memory,
23997 the damage will be limited. But we had a bug where the compiler
23998 was eliminating these wipe operations when it decided that the
23999 memory was no longer visible to a (correctly running) program,
24000 hence defeating our attempt at defense in depth. We fix that
24001 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
24002 is unlikely to optimize away. Future versions of Tor may use
24003 a less ridiculously heavy approach for this. Fixes bug 7352.
24004 Reported in an article by Andrey Karpov.
24007 - Add GeoIP database for IPv6 addresses. The new config option
24009 - Bridge statistics now count bridge clients connecting over IPv6:
24010 bridge statistics files now list "bridge-ip-versions" and
24011 extra-info documents list "geoip6-db-digest". The control protocol
24012 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
24013 implementation by "shkoo", addressing ticket 5055.
24016 - Warn when we are binding low ports when hibernation is enabled;
24017 previously we had warned when we were _advertising_ low ports with
24018 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
24019 - Fix a harmless bug when opting against publishing a relay descriptor
24020 because DisableNetwork is set. Fixes bug 7464; bugfix on
24022 - Add warning message when a managed proxy dies during configuration.
24023 Fixes bug 7195; bugfix on 0.2.4.2-alpha.
24024 - Fix a linking error when building tor-fw-helper without miniupnp.
24025 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
24026 - Check for closing an or_connection_t without going through correct
24027 channel functions; emit a warning and then call
24028 connection_or_close_for_error() so we don't assert as in bugs 7212
24030 - Compile correctly on compilers without C99 designated initializer
24031 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
24032 - Avoid a possible assert that can occur when channel_send_destroy() is
24033 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
24034 or CHANNEL_STATE_ERROR when the Tor process is resumed after being
24035 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
24036 - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
24037 Fixes bug 7422; bugfix on 0.2.4.4-alpha.
24039 o Code simplification and refactoring:
24040 - Start using OpenBSD's implementation of queue.h, so that we don't
24041 need to hand-roll our own pointer and list structures whenever we
24042 need them. (We can't rely on a sys/queue.h, since some operating
24043 systems don't have them, and the ones that do have them don't all
24044 present the same extensions.)
24047 Changes in version 0.2.4.5-alpha - 2012-10-25
24048 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
24049 two important security vulnerabilities that could lead to remotely
24050 triggerable relay crashes, fix a major bug that was preventing clients
24051 from choosing suitable exit nodes, and refactor some of our code.
24053 o Major bugfixes (security, also in 0.2.3.24-rc):
24054 - Fix a group of remotely triggerable assertion failures related to
24055 incorrect link protocol negotiation. Found, diagnosed, and fixed
24056 by "some guy from France". Fix for CVE-2012-2250; bugfix on
24058 - Fix a denial of service attack by which any directory authority
24059 could crash all the others, or by which a single v2 directory
24060 authority could crash everybody downloading v2 directory
24061 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
24063 o Major bugfixes (also in 0.2.3.24-rc):
24064 - When parsing exit policy summaries from microdescriptors, we had
24065 previously been ignoring the last character in each one, so that
24066 "accept 80,443,8080" would be treated by clients as indicating
24067 a node that allows access to ports 80, 443, and 808. That would
24068 lead to clients attempting connections that could never work,
24069 and ignoring exit nodes that would support their connections. Now
24070 clients parse these exit policy summaries correctly. Fixes bug 7192;
24071 bugfix on 0.2.3.1-alpha.
24073 o Minor bugfixes (also in 0.2.3.24-rc):
24074 - Clients now consider the ClientRejectInternalAddresses config option
24075 when using a microdescriptor consensus stanza to decide whether
24076 an exit relay would allow exiting to an internal address. Fixes
24077 bug 7190; bugfix on 0.2.3.1-alpha.
24080 - Only disable TLS session ticket support when running as a TLS
24081 server. Now clients will blend better with regular Firefox
24082 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
24084 o Code simplification and refactoring:
24085 - Start using OpenBSD's implementation of queue.h (originally by
24087 - Move the entry node code from circuitbuild.c to its own file.
24088 - Move the circuit build timeout tracking code from circuitbuild.c
24092 Changes in version 0.2.3.24-rc - 2012-10-25
24093 Tor 0.2.3.24-rc fixes two important security vulnerabilities that
24094 could lead to remotely triggerable relay crashes, and fixes
24095 a major bug that was preventing clients from choosing suitable exit
24098 o Major bugfixes (security):
24099 - Fix a group of remotely triggerable assertion failures related to
24100 incorrect link protocol negotiation. Found, diagnosed, and fixed
24101 by "some guy from France". Fix for CVE-2012-2250; bugfix on
24103 - Fix a denial of service attack by which any directory authority
24104 could crash all the others, or by which a single v2 directory
24105 authority could crash everybody downloading v2 directory
24106 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
24109 - When parsing exit policy summaries from microdescriptors, we had
24110 previously been ignoring the last character in each one, so that
24111 "accept 80,443,8080" would be treated by clients as indicating
24112 a node that allows access to ports 80, 443, and 808. That would
24113 lead to clients attempting connections that could never work,
24114 and ignoring exit nodes that would support their connections. Now
24115 clients parse these exit policy summaries correctly. Fixes bug 7192;
24116 bugfix on 0.2.3.1-alpha.
24119 - Clients now consider the ClientRejectInternalAddresses config option
24120 when using a microdescriptor consensus stanza to decide whether
24121 an exit relay would allow exiting to an internal address. Fixes
24122 bug 7190; bugfix on 0.2.3.1-alpha.
24125 Changes in version 0.2.4.4-alpha - 2012-10-20
24126 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
24127 vulnerability introduced by a change in OpenSSL, fixes a remotely
24128 triggerable assert, and adds new channel_t and circuitmux_t abstractions
24129 that will make it easier to test new connection transport and cell
24130 scheduling algorithms.
24132 o New directory authorities (also in 0.2.3.23-rc):
24133 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
24134 authority. Closes ticket 5749.
24136 o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
24137 - Disable TLS session tickets. OpenSSL's implementation was giving
24138 our TLS session keys the lifetime of our TLS context objects, when
24139 perfect forward secrecy would want us to discard anything that
24140 could decrypt a link connection as soon as the link connection
24141 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
24142 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
24143 - Discard extraneous renegotiation attempts once the V3 link
24144 protocol has been initiated. Failure to do so left us open to
24145 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
24146 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
24148 o Internal abstraction features:
24149 - Introduce new channel_t abstraction between circuits and
24150 or_connection_t to allow for implementing alternate OR-to-OR
24151 transports. A channel_t is an abstract object which can either be a
24152 cell-bearing channel, which is responsible for authenticating and
24153 handshaking with the remote OR and transmitting cells to and from
24154 it, or a listening channel, which spawns new cell-bearing channels
24155 at the request of remote ORs. Implements part of ticket 6465.
24156 - Also new is the channel_tls_t subclass of channel_t, adapting it
24157 to the existing or_connection_t code. The V2/V3 protocol handshaking
24158 code which formerly resided in command.c has been moved below the
24159 channel_t abstraction layer and may be found in channeltls.c now.
24160 Implements the rest of ticket 6465.
24161 - Introduce new circuitmux_t storing the queue of circuits for
24162 a channel; this encapsulates and abstracts the queue logic and
24163 circuit selection policy, and allows the latter to be overridden
24164 easily by switching out a policy object. The existing EWMA behavior
24165 is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
24167 o Required libraries:
24168 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
24169 strongly recommended.
24172 - Warn users who run hidden services on a Tor client with
24173 UseEntryGuards disabled that their hidden services will be
24174 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
24175 attack which motivated Tor to support entry guards in the first
24176 place). Resolves ticket 6889.
24177 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
24178 dhill. Resolves ticket 6982.
24179 - Option OutboundBindAddress can be specified multiple times and
24180 accepts IPv6 addresses. Resolves ticket 6876.
24182 o Minor bugfixes (also in 0.2.3.23-rc):
24183 - Don't serve or accept v2 hidden service descriptors over a
24184 relay's DirPort. It's never correct to do so, and disabling it
24185 might make it more annoying to exploit any bugs that turn up in the
24186 descriptor-parsing code. Fixes bug 7149.
24187 - Fix two cases in src/or/transports.c where we were calling
24188 fmt_addr() twice in a parameter list. Bug found by David
24189 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
24190 - Fix memory leaks whenever we logged any message about the "path
24191 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
24192 - When relays refuse a "create" cell because their queue of pending
24193 create cells is too big (typically because their cpu can't keep up
24194 with the arrival rate), send back reason "resource limit" rather
24195 than reason "internal", so network measurement scripts can get a
24196 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
24199 - Command-line option "--version" implies "--quiet". Fixes bug 6997.
24200 - Free some more still-in-use memory at exit, to make hunting for
24201 memory leaks easier. Resolves bug 7029.
24202 - When a Tor client gets a "truncated" relay cell, the first byte of
24203 its payload specifies why the circuit was truncated. We were
24204 ignoring this 'reason' byte when tearing down the circuit, resulting
24205 in the controller not being told why the circuit closed. Now we
24206 pass the reason from the truncated cell to the controller. Bugfix
24207 on 0.1.2.3-alpha; fixes bug 7039.
24208 - Downgrade "Failed to hand off onionskin" messages to "debug"
24209 severity, since they're typically redundant with the "Your computer
24210 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
24211 - Make clients running with IPv6 bridges connect over IPv6 again,
24212 even without setting new config options ClientUseIPv6 and
24213 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
24214 - Use square brackets around IPv6 addresses in numerous places
24215 that needed them, including log messages, HTTPS CONNECT proxy
24216 requests, TransportProxy statefile entries, and pluggable transport
24217 extra-info lines. Fixes bug 7011; patch by David Fifield.
24219 o Code refactoring and cleanup:
24220 - Source files taken from other packages now reside in src/ext;
24221 previously they were scattered around the rest of Tor.
24222 - Avoid use of reserved identifiers in our C code. The C standard
24223 doesn't like us declaring anything that starts with an
24224 underscore, so let's knock it off before we get in trouble. Fix
24225 for bug 1031; bugfix on the first Tor commit.
24228 Changes in version 0.2.3.23-rc - 2012-10-20
24229 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
24230 vulnerability introduced by a change in OpenSSL, and fixes a variety
24231 of smaller bugs in preparation for the release.
24233 o New directory authorities:
24234 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
24235 authority. Closes ticket 5749.
24237 o Major bugfixes (security/privacy):
24238 - Disable TLS session tickets. OpenSSL's implementation was giving
24239 our TLS session keys the lifetime of our TLS context objects, when
24240 perfect forward secrecy would want us to discard anything that
24241 could decrypt a link connection as soon as the link connection
24242 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
24243 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
24244 - Discard extraneous renegotiation attempts once the V3 link
24245 protocol has been initiated. Failure to do so left us open to
24246 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
24247 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
24250 - Fix a possible crash bug when checking for deactivated circuits
24251 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
24252 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
24254 o Minor bugfixes (on 0.2.3.x):
24255 - Fix two cases in src/or/transports.c where we were calling
24256 fmt_addr() twice in a parameter list. Bug found by David
24257 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
24258 - Convert an assert in the pathbias code to a log message. The assert
24259 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
24260 bugfix on 0.2.3.17-beta.
24261 - Fix memory leaks whenever we logged any message about the "path
24262 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
24264 o Minor bugfixes (on 0.2.2.x and earlier):
24265 - Don't serve or accept v2 hidden service descriptors over a relay's
24266 DirPort. It's never correct to do so, and disabling it might
24267 make it more annoying to exploit any bugs that turn up in the
24268 descriptor-parsing code. Fixes bug 7149.
24269 - When relays refuse a "create" cell because their queue of pending
24270 create cells is too big (typically because their cpu can't keep up
24271 with the arrival rate), send back reason "resource limit" rather
24272 than reason "internal", so network measurement scripts can get a
24273 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
24274 - Correct file sizes when reading binary files on Cygwin, to avoid
24275 a bug where Tor would fail to read its state file. Fixes bug 6844;
24276 bugfix on 0.1.2.7-alpha.
24277 - Avoid undefined behavior when parsing the list of supported
24278 rendezvous/introduction protocols in a hidden service descriptor.
24279 Previously, Tor would have confused (as-yet-unused) protocol version
24280 numbers greater than 32 with lower ones on many platforms. Fixes
24281 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
24283 o Documentation fixes:
24284 - Clarify that hidden services are TCP only. Fixes bug 6024.
24287 Changes in version 0.2.4.3-alpha - 2012-09-22
24288 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
24289 assertion, resumes letting relays test reachability of their DirPort,
24290 and cleans up a bunch of smaller bugs.
24293 - Fix an assertion failure in tor_timegm() that could be triggered
24294 by a badly formatted directory object. Bug found by fuzzing with
24295 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
24298 - Fix a possible crash bug when checking for deactivated circuits
24299 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
24300 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
24301 - Allow routers to detect that their own DirPorts are running. When
24302 we removed support for versions_supports_begindir, we also
24303 accidentally removed the mechanism we used to self-test our
24304 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
24305 bugfix on 0.2.4.2-alpha.
24307 o Security features:
24308 - Switch to a completely time-invariant approach for picking nodes
24309 weighted by bandwidth. Our old approach would run through the
24310 part of the loop after it had made its choice slightly slower
24311 than it ran through the part of the loop before it had made its
24312 choice. Addresses ticket 6538.
24313 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
24314 by tor2web clients allows hidden services to identify tor2web
24315 clients through their repeated selection of the same rendezvous
24316 and introduction point circuit endpoints (their guards). Resolves
24320 - Enable Tor to read configuration, state, and key information from
24321 a FIFO. Previously Tor would only read from files with a positive
24322 stat.st_size. Code from meejah; fixes bug 6044.
24325 - Correct file sizes when reading binary files on Cygwin, to avoid
24326 a bug where Tor would fail to read its state file. Fixes bug 6844;
24327 bugfix on 0.1.2.7-alpha.
24328 - Correctly handle votes with more than 31 flags. Fixes bug 6853;
24329 bugfix on 0.2.0.3-alpha.
24330 - When complaining about a client port on a public address, log
24331 which address we're complaining about. Fixes bug 4020; bugfix on
24332 0.2.3.3-alpha. Patch by Tom Fitzhenry.
24333 - Convert an assert in the pathbias code to a log message. The assert
24334 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
24335 bugfix on 0.2.3.17-beta.
24336 - Our new buildsystem was overzealous about rebuilding manpages: it
24337 would rebuild them all whenever any one of them changed. Now our
24338 dependency checking should be correct. Fixes bug 6843; bugfix on
24340 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
24341 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
24342 - Correct log printout about which address family is preferred
24343 when connecting to a bridge with both an IPv4 and IPv6 OR port.
24344 Fixes bug 6884; bugfix on 0.2.4.1-alpha.
24346 o Minor bugfixes (code cleanliness):
24347 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
24348 with large values. This situation was untriggered, but nevertheless
24349 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
24350 - Reject consensus votes with more than 64 known-flags. We aren't even
24351 close to that limit yet, and our code doesn't handle it correctly.
24352 Fixes bug 6833; bugfix on 0.2.0.1-alpha.
24353 - Avoid undefined behavior when parsing the list of supported
24354 rendezvous/introduction protocols in a hidden service descriptor.
24355 Previously, Tor would have confused (as-yet-unused) protocol version
24356 numbers greater than 32 with lower ones on many platforms. Fixes
24357 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
24358 - Fix handling of rendezvous client authorization types over 8.
24359 Fixes bug 6861; bugfix on 0.2.1.5-alpha.
24360 - Fix building with older versions of GCC (2.95, for one) that don't
24361 like preprocessor directives inside macro arguments. Found by
24362 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
24363 - Switch weighted node selection rule from using a list of doubles
24364 to using a list of int64_t. This change should make the process
24365 slightly easier to debug and maintain. Needed to finish ticket 6538.
24367 o Code simplification and refactoring:
24368 - Move the generic "config" code into a new file, and have "config.c"
24369 hold only torrc- and state-related code. Resolves ticket 6823.
24370 - Move the core of our "choose a weighted element at random" logic
24371 into its own function, and give it unit tests. Now the logic is
24372 testable, and a little less fragile too.
24373 - Removed the testing_since field of node_t, which hasn't been used
24374 for anything since 0.2.0.9-alpha.
24376 o Documentation fixes:
24377 - Clarify that hidden services are TCP only. Fixes bug 6024.
24378 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
24382 Changes in version 0.2.3.22-rc - 2012-09-11
24383 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
24387 - Fix an assertion failure in tor_timegm() that could be triggered
24388 by a badly formatted directory object. Bug found by fuzzing with
24389 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
24392 - Avoid segfault when starting up having run with an extremely old
24393 version of Tor and parsing its state file. Fixes bug 6801; bugfix
24397 Changes in version 0.2.2.39 - 2012-09-11
24398 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
24402 - Fix an assertion failure in tor_timegm() that could be triggered
24403 by a badly formatted directory object. Bug found by fuzzing with
24404 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
24405 - Do not crash when comparing an address with port value 0 to an
24406 address policy. This bug could have been used to cause a remote
24407 assertion failure by or against directory authorities, or to
24408 allow some applications to crash clients. Fixes bug 6690; bugfix
24412 Changes in version 0.2.4.2-alpha - 2012-09-10
24413 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
24414 raises the default rate limiting even more, and makes the bootstrapping
24415 log messages less noisy.
24418 - Automatically forward the TCP ports of pluggable transport
24419 proxies using tor-fw-helper if PortForwarding is enabled. Implements
24423 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
24424 to 1GB/1GB. The previous defaults were intended to be "basically
24425 infinite", but it turns out they're now limiting our 100mbit+
24426 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
24427 last time we raised it).
24430 - Detect when we're running with a version of OpenSSL other than the
24431 one we compiled with. This has occasionally given people hard-to-
24433 - Log fewer lines at level "notice" about our OpenSSL and Libevent
24434 versions and capabilities when everything is going right. Resolves
24435 part of ticket 6736.
24436 - Directory authorities no long accept descriptors for any version of
24437 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
24438 These versions are insecure, unsupported, or both. Implements
24442 - Rename the (internal-use-only) UsingTestingNetworkDefaults option
24443 to start with a triple-underscore so the controller won't touch it.
24444 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
24445 - Avoid segfault when starting up having run with an extremely old
24446 version of Tor and parsing its state file. Fixes bug 6801; bugfix
24448 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
24449 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
24450 - Don't follow the NULL pointer if microdescriptor generation fails.
24451 (This does not appear to be triggerable, but it's best to be safe.)
24452 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
24453 - Fix mis-declared dependencies on src/common/crypto.c and
24454 src/or/tor_main.c that could break out-of-tree builds under some
24455 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
24456 - Avoid a warning when building common_sha1.i out of tree. Fixes bug
24457 6778; bugfix on 0.2.4.1-alpha.
24458 - Fix a harmless (in this case) build warning for implicitly
24459 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
24461 o Removed features:
24462 - Now that all versions before 0.2.2.x are disallowed, we no longer
24463 need to work around their missing features. Thus we can remove a
24464 bunch of compatibility code.
24466 o Code refactoring:
24467 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
24468 TCP ports to forward. In the past it only accepted two ports:
24469 the ORPort and the DirPort.
24472 Changes in version 0.2.4.1-alpha - 2012-09-05
24473 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
24474 bridgedb; lets relays use IPv6 addresses and directory authorities
24475 advertise them; and switches to a cleaner build interface.
24477 This is the first alpha release in a new series, so expect there to
24478 be bugs. Users who would rather test out a more stable branch should
24479 stay with 0.2.3.x for now.
24481 o Major features (bridges):
24482 - Bridges now report the pluggable transports they support to the
24483 bridge authority, so it can pass the supported transports on to
24484 bridgedb and/or eventually do reachability testing. Implements
24487 o Major features (IPv6):
24488 - Bridge authorities now accept IPv6 bridge addresses and include
24489 them in network status documents. Implements ticket 5534.
24490 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
24491 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
24492 to happen. Implements ticket 5535.
24493 - All kind of relays, not just bridges, can now advertise an IPv6
24494 OR port. Implements ticket 6362.
24495 - Directory authorities vote on IPv6 OR ports using the new consensus
24496 method 14. Implements ticket 6363.
24498 o Major features (build):
24499 - Switch to a nonrecursive Makefile structure. Now instead of each
24500 Makefile.am invoking other Makefile.am's, there is a master
24501 Makefile.am that includes the others. This change makes our build
24502 process slightly more maintainable, and improves parallelism for
24503 building with make -j. Original patch by Stewart Smith; various
24504 fixes by Jim Meyering.
24505 - Where available, we now use automake's "silent" make rules by
24506 default, so that warnings are easier to spot. You can get the old
24507 behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
24509 o Minor features (code security and spec conformance):
24510 - Clear keys and key-derived material left on the stack in
24511 rendservice.c and rendclient.c. Check return value of
24512 crypto_pk_write_private_key_to_string() in rend_service_load_keys().
24513 These fixes should make us more forward-secure against cold-boot
24514 attacks and the like. Fixes bug 2385.
24515 - Reject EXTEND cells sent to nonexistent streams. According to the
24516 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
24517 we were only checking for stream IDs that were currently in use.
24518 Found while hunting for more instances of bug 6271. Bugfix on
24519 0.0.2pre8, which introduced incremental circuit construction.
24521 o Minor features (streamlining);
24522 - No longer include the "opt" prefix when generating routerinfos
24523 or v2 directories: it has been needless since Tor 0.1.2. Closes
24525 - Remove some now-needless code that tried to aggressively flush
24526 OR connections as data was added to them. Since 0.2.0.1-alpha, our
24527 cell queue logic has saved us from the failure mode that this code
24528 was supposed to prevent. Removing this code will limit the number
24529 of baroque control flow paths through Tor's network logic. Reported
24530 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
24532 o Minor features (controller):
24533 - Add a "GETINFO signal/names" control port command. Implements
24535 - Provide default values for all options via "GETINFO config/defaults".
24536 Implements ticket 4971.
24538 o Minor features (IPv6):
24539 - New config option "AuthDirHasIPv6Connectivity 1" that directory
24540 authorities should set if they have IPv6 connectivity and want to
24541 do reachability tests for IPv6 relays. Implements feature 5974.
24542 - A relay with an IPv6 OR port now sends that address in NETINFO
24543 cells (in addition to its other address). Implements ticket 6364.
24545 o Minor features (log messages):
24546 - Omit the first heartbeat log message, because it never has anything
24547 useful to say, and it clutters up the bootstrapping messages.
24548 Resolves ticket 6758.
24549 - Don't log about reloading the microdescriptor cache at startup. Our
24550 bootstrap warnings are supposed to tell the user when there's a
24551 problem, and our bootstrap notices say when there isn't. Resolves
24552 ticket 6759; bugfix on 0.2.2.6-alpha.
24553 - Don't log "I learned some more directory information" when we're
24554 reading cached directory information. Reserve it for when new
24555 directory information arrives in response to a fetch. Resolves
24557 - Prevent rounding error in path bias counts when scaling
24558 them down, and use the correct scale factor default. Also demote
24559 some path bias related log messages down a level and make others
24560 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
24561 - We no longer warn so much when generating manpages from their
24564 o Code simplifications and refactoring:
24565 - Enhance our internal sscanf replacement so that we can eliminate
24566 the last remaining uses of the system sscanf. (Though those uses
24567 of sscanf were safe, sscanf itself is generally error prone, so
24568 we want to eliminate when we can.) Fixes ticket 4195 and Coverity
24570 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
24571 - Move last_reachable and testing_since from routerinfo_t to node_t.
24572 Implements ticket 5529.
24573 - Add replaycache_t structure, functions and unit tests, then refactor
24574 rend_service_introduce() to be more clear to read, improve, debug,
24575 and test. Resolves bug 6177.
24576 - Finally remove support for malloc_good_size and malloc_usable_size.
24577 We had hoped that these functions would let us eke a little more
24578 memory out of our malloc implementation. Unfortunately, the only
24579 implementations that provided these functions are also ones that
24580 are already efficient about not overallocation: they never got us
24581 more than 7 or so bytes per allocation. Removing them saves us a
24582 little code complexity and a nontrivial amount of build complexity.
24584 o New requirements:
24585 - Tor maintainers now require Automake version 1.9 or later to build
24586 Tor from the Git repository. (Automake is not required when building
24587 from a source distribution.)
24590 Changes in version 0.2.3.21-rc - 2012-09-05
24591 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
24592 series. It fixes a trio of potential security bugs, fixes a bug where
24593 we were leaving some of the fast relays out of the microdescriptor
24594 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
24595 and cleans up other smaller issues.
24597 o Major bugfixes (security):
24598 - Tear down the circuit if we get an unexpected SENDME cell. Clients
24599 could use this trick to make their circuits receive cells faster
24600 than our flow control would have allowed, or to gum up the network,
24601 or possibly to do targeted memory denial-of-service attacks on
24602 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
24603 from July 2002, before the release of Tor 0.0.0. We had committed
24604 this patch previously, but we had to revert it because of bug 6271.
24605 Now that 6271 is fixed, this patch appears to work.
24606 - Reject any attempt to extend to an internal address. Without
24607 this fix, a router could be used to probe addresses on an internal
24608 network to see whether they were accepting connections. Fixes bug
24609 6710; bugfix on 0.0.8pre1.
24610 - Do not crash when comparing an address with port value 0 to an
24611 address policy. This bug could have been used to cause a remote
24612 assertion failure by or against directory authorities, or to
24613 allow some applications to crash clients. Fixes bug 6690; bugfix
24617 - Remove the upper bound on microdescriptor length. We were hitting
24618 the limit for routers with complex exit policies or family
24619 declarations, causing clients to not use them. Fixes the first
24620 piece of bug 6404; fix on 0.2.2.6-alpha.
24621 - Detect "ORPort 0" as meaning, uniformly, that we're not running
24622 as a relay. Previously, some of our code would treat the presence
24623 of any ORPort line as meaning that we should act like a relay,
24624 even though our new listener code would correctly not open any
24625 ORPorts for ORPort 0. Similar bugs in other Port options are also
24626 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
24629 - Avoid a pair of double-free and use-after-mark bugs that can
24630 occur with certain timings in canceled and re-received DNS
24631 requests. Fixes bug 6472; bugfix on 0.0.7rc1.
24632 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
24633 Fixes bug 6379. Bugfix on 0.2.0.20-rc.
24634 - Allow one-hop directory fetching circuits the full "circuit build
24635 timeout" period, rather than just half of it, before failing them
24636 and marking the relay down. This fix should help reduce cases where
24637 clients declare relays (or worse, bridges) unreachable because
24638 the TLS handshake takes a few seconds to complete. Fixes bug 6743;
24639 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
24641 - Authorities no longer include any router in their microdescriptor
24642 consensuses for which they couldn't generate or agree on a
24643 microdescriptor. Fixes the second piece of bug 6404; fix on
24645 - Detect and reject attempts to specify both "FooPort" and
24646 "FooPort 0" in the same configuration domain. (It's still okay
24647 to have a FooPort in your configuration file, and use "FooPort 0"
24648 on the command line to disable it.) Fixes the second half of bug
24649 6507; bugfix on 0.2.3.3-alpha.
24650 - Make wildcarded addresses (that is, ones beginning with "*.") work
24651 when provided via the controller's MapAddress command. Previously,
24652 they were accepted, but we never actually noticed that they were
24653 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
24654 - Avoid crashing on a malformed state file where EntryGuardPathBias
24655 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
24656 - Add a (probably redundant) memory clear between iterations of
24657 the router status voting loop, to prevent future coding errors
24658 where data might leak between iterations of the loop. Resolves
24661 o Minor bugfixes (log messages):
24662 - Downgrade "set buildtimeout to low value" messages to "info"
24663 severity; they were never an actual problem, there was never
24664 anything reasonable to do about them, and they tended to spam logs
24665 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
24666 - Downgrade path-bias warning messages to "info". We'll try to get
24667 them working better in 0.2.4. Add internal circuit construction
24668 state to protect against the noisy warn message "Unexpectedly high
24669 circuit_successes". Also add some additional rate-limited notice
24670 messages to help determine the root cause of the warn. Fixes bug
24671 6475. Bugfix against 0.2.3.17-beta.
24672 - Move log message when unable to find a microdesc in a routerstatus
24673 entry to parse time. Previously we'd spam this warning every time
24674 we tried to figure out which microdescriptors to download. Fixes
24675 the third piece of bug 6404; fix on 0.2.3.18-rc.
24678 - Consider new, removed or changed IPv6 OR ports a non-cosmetic
24679 change when the authority is deciding whether to accept a newly
24680 uploaded descriptor. Implements ticket 6423.
24681 - Add missing documentation for consensus and microdesc files.
24682 Resolves ticket 6732.
24685 Changes in version 0.2.2.38 - 2012-08-12
24686 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
24687 attack that could in theory leak path information.
24690 - Avoid an uninitialized memory read when reading a vote or consensus
24691 document that has an unrecognized flavor name. This read could
24692 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
24693 - Try to leak less information about what relays a client is
24694 choosing to a side-channel attacker. Previously, a Tor client would
24695 stop iterating through the list of available relays as soon as it
24696 had chosen one, thus finishing a little earlier when it picked
24697 a router earlier in the list. If an attacker can recover this
24698 timing information (nontrivial but not proven to be impossible),
24699 they could learn some coarse-grained information about which relays
24700 a client was picking (middle nodes in particular are likelier to
24701 be affected than exits). The timing attack might be mitigated by
24702 other factors (see bug 6537 for some discussion), but it's best
24703 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
24706 Changes in version 0.2.3.20-rc - 2012-08-05
24707 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
24708 series. It fixes a pair of code security bugs and a potential anonymity
24709 issue, updates our RPM spec files, and cleans up other smaller issues.
24712 - Avoid read-from-freed-memory and double-free bugs that could occur
24713 when a DNS request fails while launching it. Fixes bug 6480;
24714 bugfix on 0.2.0.1-alpha.
24715 - Avoid an uninitialized memory read when reading a vote or consensus
24716 document that has an unrecognized flavor name. This read could
24717 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
24718 - Try to leak less information about what relays a client is
24719 choosing to a side-channel attacker. Previously, a Tor client would
24720 stop iterating through the list of available relays as soon as it
24721 had chosen one, thus finishing a little earlier when it picked
24722 a router earlier in the list. If an attacker can recover this
24723 timing information (nontrivial but not proven to be impossible),
24724 they could learn some coarse-grained information about which relays
24725 a client was picking (middle nodes in particular are likelier to
24726 be affected than exits). The timing attack might be mitigated by
24727 other factors (see bug 6537 for some discussion), but it's best
24728 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
24731 - Try to make the warning when giving an obsolete SOCKSListenAddress
24732 a little more useful.
24733 - Terminate active server managed proxies if Tor stops being a
24734 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
24735 - Provide a better error message about possible OSX Asciidoc failure
24736 reasons. Fixes bug 6436.
24737 - Warn when Tor is configured to use accounting in a way that can
24738 link a hidden service to some other hidden service or public
24739 address. Resolves ticket 6490.
24742 - Check return value of fputs() when writing authority certificate
24743 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
24744 - Ignore ServerTransportPlugin lines when Tor is not configured as
24745 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
24746 - When disabling guards for having too high a proportion of failed
24747 circuits, make sure to look at each guard. Fixes bug 6397; bugfix
24751 - Update our default RPM spec files to work with mock and rpmbuild
24752 on RHEL/Fedora. They have an updated set of dependencies and
24753 conflicts, a fix for an ancient typo when creating the "_tor"
24754 user, and better instructions. Thanks to Ondrej Mikle for the
24755 patch series. Fixes bug 6043.
24758 - Make it possible to set the TestingTorNetwork configuration
24759 option using AlternateDirAuthority and AlternateBridgeAuthority
24760 as an alternative to setting DirServer. Addresses ticket 6377.
24763 - Clarify the documentation for the Alternate*Authority options.
24765 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
24767 o Code simplification and refactoring:
24768 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
24769 10 lines. Also, don't nest them. Doing so in the past has
24770 led to hard-to-debug code. The new style is to use the
24771 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
24774 Changes in version 0.2.3.19-rc - 2012-07-06
24775 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
24776 series. It fixes the compile on Windows, reverts to a GeoIP database
24777 that isn't as broken, and fixes a flow control bug that has been around
24778 since the beginning of Tor.
24781 - Fix a bug handling SENDME cells on nonexistent streams that could
24782 result in bizarre window values. Report and patch contributed
24783 pseudonymously. Fixes part of bug 6271. This bug was introduced
24784 before the first Tor release, in svn commit r152.
24785 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
24786 June 2012 database, Maxmind marked many Tor relays as country "A1",
24787 which will cause risky behavior for clients that set EntryNodes
24788 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
24789 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
24790 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
24793 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
24794 bugfix on 0.2.1.10-alpha.
24797 Changes in version 0.2.3.18-rc - 2012-06-28
24798 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
24799 series. It fixes a few smaller bugs, but generally appears stable.
24800 Please test it and let us know whether it is!
24803 - Allow wildcarded mapaddress targets to be specified on the
24804 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
24805 - Make our linker option detection code more robust against linkers
24806 such as on FreeBSD 8, where a bad combination of options completes
24807 successfully but makes an unrunnable binary. Fixes bug 6173;
24808 bugfix on 0.2.3.17-beta.
24810 o Minor bugfixes (on 0.2.2.x and earlier):
24811 - Avoid a false positive in the util/threads unit test by increasing
24812 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
24813 - Replace "Sending publish request" log messages with "Launching
24814 upload", so that they no longer confusingly imply that we're
24815 sending something to a directory we might not even be connected
24816 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
24817 - Make sure to set *socket_error in all error cases in
24818 connection_connect(), so it can't produce a warning about
24819 errno being zero from errno_to_orconn_end_reason(). Bugfix on
24820 0.2.1.1-alpha; resolves ticket 6028.
24821 - Downgrade "Got a certificate, but we already have it" log messages
24822 from warning to info, except when we're a dirauth. Fixes bug 5238;
24823 bugfix on 0.2.1.7-alpha.
24824 - When checking for requested signatures on the latest consensus
24825 before serving it to a client, make sure to check the right
24826 consensus flavor. Bugfix on 0.2.2.6-alpha.
24827 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
24828 Fixes bug 5932; bugfix on 0.2.2.7-alpha.
24830 o Minor bugfixes (on 0.2.3.x):
24831 - Make format_helper_exit_status() avoid unnecessary space padding
24832 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
24834 - Downgrade a message about cleaning the microdescriptor cache to
24835 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
24836 - Log a BUG message at severity INFO if we have a networkstatus with
24837 a missing entry for some microdescriptor. Continues on a patch
24839 - Improve the log message when a managed proxy fails to launch. Fixes
24840 bug 5099; bugfix on 0.2.3.6-alpha.
24841 - Don't do DNS lookups when parsing corrupted managed proxy protocol
24842 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
24843 - When formatting wildcarded address mappings for the controller,
24844 be sure to include "*." as appropriate. Partially fixes bug 6244;
24845 bugfix on 0.2.3.9-alpha.
24846 - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
24847 Bugfix on 0.2.3.13-alpha.
24848 - Stop logging messages about running with circuit timeout learning
24849 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
24850 - Disable a spurious warning about reading on a marked and flushing
24851 connection. We shouldn't be doing that, but apparently we
24852 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
24853 - Fix a bug that stopped AllowDotExit from working on addresses
24854 that had an entry in the DNS cache. Fixes bug 6211; bugfix on
24857 o Code simplification, refactoring, unit tests:
24858 - Move tor_gettimeofday_cached() into compat_libevent.c, and use
24859 Libevent's notion of cached time when possible.
24860 - Remove duplicate code for invoking getrlimit() from control.c.
24861 - Add a unit test for the environment_variable_names_equal function.
24864 - Document the --defaults-torrc option, and the new (in 0.2.3)
24865 semantics for overriding, extending, and clearing lists of
24866 options. Closes bug 4748.
24869 Changes in version 0.2.3.17-beta - 2012-06-15
24870 Tor 0.2.3.17-beta enables compiler and linker hardening by default,
24871 gets our TLS handshake back on track for being able to blend in with
24872 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
24873 with Vidalia, and otherwise continues to get us closer to a release
24877 - Enable gcc and ld hardening by default. Resolves ticket 5210.
24878 - Update TLS cipher list to match Firefox 8 and later. Resolves
24880 - Implement the client side of proposal 198: remove support for
24881 clients falsely claiming to support standard ciphersuites that
24882 they can actually provide. As of modern OpenSSL versions, it's not
24883 necessary to fake any standard ciphersuite, and doing so prevents
24884 us from using better ciphersuites in the future, since servers
24885 can't know whether an advertised ciphersuite is really supported or
24886 not. Some hosts -- notably, ones with very old versions of OpenSSL
24887 or where OpenSSL has been built with ECC disabled -- will stand
24888 out because of this change; TBB users should not be affected.
24891 - Change the default value for DynamicDHGroups (introduced in
24892 0.2.3.9-alpha) to 0. This feature can make Tor relays less
24893 identifiable by their use of the mod_ssl DH group, but at
24894 the cost of some usability (#4721) and bridge tracing (#6087)
24895 regressions. Resolves ticket 5598.
24896 - Send a CRLF at the end of each STATUS_* control protocol event. This
24897 bug tickled a bug in Vidalia which would make it freeze. Fixes
24898 bug 6094; bugfix on 0.2.3.16-alpha.
24901 - Disable writing on marked-for-close connections when they are
24902 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
24903 bug 5263; bugfix on 0.0.2pre13, where we first added a special
24904 case for flushing marked connections.
24905 - Detect SSL handshake even when the initial attempt to write the
24906 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
24907 - Change the AllowDotExit rules so they should actually work.
24908 We now enforce AllowDotExit only immediately after receiving an
24909 address via SOCKS or DNSPort: other sources are free to provide
24910 .exit addresses after the resolution occurs. Fixes bug 3940;
24911 bugfix on 0.2.2.1-alpha.
24912 - Fix a (harmless) integer overflow in cell statistics reported by
24913 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
24914 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
24915 right places and never depends on the consensus parameters or
24916 computes adaptive timeouts when it is disabled. Fixes bug 5049;
24917 bugfix on 0.2.2.14-alpha.
24918 - When building Tor on Windows with -DUNICODE (not default), ensure
24919 that error messages, filenames, and DNS server names are always
24920 NUL-terminated when we convert them to a single-byte encoding.
24921 Fixes bug 5909; bugfix on 0.2.2.16-alpha.
24922 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
24923 Fixes bug 6097; bugfix on 0.2.2.16-alpha.
24924 - Fix an edge case where TestingTorNetwork is set but the authorities
24925 and relays all have an uptime of zero, where the private Tor network
24926 could briefly lack support for hidden services. Fixes bug 3886;
24927 bugfix on 0.2.2.18-alpha.
24928 - Correct the manpage's descriptions for the default values of
24929 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
24931 - Fix the documentation for the --hush and --quiet command line
24932 options, which changed their behavior back in 0.2.3.3-alpha.
24933 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
24937 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
24938 more information to it, so that we can track it down in case it
24939 returns again. Mitigates bug 5235.
24940 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
24941 options_validate(); warn if LearnCircuitBuildTimeout is disabled and
24942 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
24943 - Warn the user when HTTPProxy, but no other proxy type, is
24944 configured. This can cause surprising behavior: it doesn't send
24945 all of Tor's traffic over the HTTPProxy -- it sends unencrypted
24946 directory traffic only. Resolves ticket 4663.
24947 - Issue a notice if a guard completes less than 40% of your circuits.
24948 Threshold is configurable by torrc option PathBiasNoticeRate and
24949 consensus parameter pb_noticepct. There is additional, off-by-
24950 default code to disable guards which fail too many circuits.
24951 Addresses ticket 5458.
24952 - Update to the June 6 2012 Maxmind GeoLite Country database.
24954 o Code simplifications and refactoring:
24955 - Remove validate_pluggable_transports_config(): its warning
24956 message is now handled by connection_or_connect().
24959 Changes in version 0.2.2.37 - 2012-06-06
24960 Tor 0.2.2.37 introduces a workaround for a critical renegotiation
24961 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
24965 - Work around a bug in OpenSSL that broke renegotiation with TLS
24966 1.1 and TLS 1.2. Without this workaround, all attempts to speak
24967 the v2 Tor connection protocol when both sides were using OpenSSL
24968 1.0.1 would fail. Resolves ticket 6033.
24969 - When waiting for a client to renegotiate, don't allow it to add
24970 any bytes to the input buffer. This fixes a potential DoS issue.
24971 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
24972 - Fix an edge case where if we fetch or publish a hidden service
24973 descriptor, we might build a 4-hop circuit and then use that circuit
24974 for exiting afterwards -- even if the new last hop doesn't obey our
24975 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
24978 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
24979 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
24982 - Tell GCC and Clang to check for any errors in format strings passed
24983 to the tor_v*(print|scan)f functions.
24986 Changes in version 0.2.3.16-alpha - 2012-06-05
24987 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
24988 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
24989 currently). It also fixes a variety of smaller bugs and other cleanups
24990 that get us closer to a release candidate.
24992 o Major bugfixes (general):
24993 - Work around a bug in OpenSSL that broke renegotiation with TLS
24994 1.1 and TLS 1.2. Without this workaround, all attempts to speak
24995 the v2 Tor connection protocol when both sides were using OpenSSL
24996 1.0.1 would fail. Resolves ticket 6033.
24997 - When waiting for a client to renegotiate, don't allow it to add
24998 any bytes to the input buffer. This fixes a potential DoS issue.
24999 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
25000 - Pass correct OR address to managed proxies (like obfsproxy),
25001 even when ORListenAddress is used. Fixes bug 4865; bugfix on
25003 - The advertised platform of a router now includes only its operating
25004 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
25005 service pack level (for Windows) or its CPU architecture (for Unix).
25006 We also no longer include the "git-XYZ" tag in the version. Resolves
25009 o Major bugfixes (clients):
25010 - If we are unable to find any exit that supports our predicted ports,
25011 stop calling them predicted, so that we don't loop and build
25012 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
25013 which introduced predicted ports.
25014 - Fix an edge case where if we fetch or publish a hidden service
25015 descriptor, we might build a 4-hop circuit and then use that circuit
25016 for exiting afterwards -- even if the new last hop doesn't obey our
25017 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
25018 - Check at each new consensus whether our entry guards were picked
25019 long enough ago that we should rotate them. Previously, we only
25020 did this check at startup, which could lead to us holding a guard
25021 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
25022 - When fetching a bridge descriptor from a bridge authority,
25023 always do so anonymously, whether we have been able to open
25024 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
25025 This behavior makes it *safer* to use UpdateBridgesFromAuthority,
25026 but we'll need to wait for bug 6010 before it's actually usable.
25028 o Major bugfixes (directory authorities):
25029 - When computing weight parameters, behave more robustly in the
25030 presence of a bad bwweightscale value. Previously, the authorities
25031 would crash if they agreed on a sufficiently broken weight_scale
25032 value: now, they use a reasonable default and carry on. Partial
25033 fix for 5786; bugfix on 0.2.2.17-alpha.
25034 - Check more thoroughly to prevent a rogue authority from
25035 double-voting on any consensus directory parameter. Previously,
25036 authorities would crash in this case if the total number of
25037 votes for any parameter exceeded the number of active voters,
25038 but would let it pass otherwise. Partial fix for bug 5786; bugfix
25042 - Rate-limit log messages when asked to connect anonymously to
25043 a private address. When these hit, they tended to hit fast and
25044 often. Also, don't bother trying to connect to addresses that we
25045 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
25046 reply makes us think we have been lied to, even when the address the
25047 client tried to connect to was "localhost." Resolves ticket 2822.
25048 - Allow packagers to insert an extra string in server descriptor
25049 platform lines by setting the preprocessor variable TOR_BUILD_TAG.
25050 Resolves the rest of ticket 2988.
25051 - Raise the threshold of server descriptors needed (75%) and exit
25052 server descriptors needed (50%) before we will declare ourselves
25053 bootstrapped. This will make clients start building circuits a
25054 little later, but makes the initially constructed circuits less
25055 skewed and less in conflict with further directory fetches. Fixes
25057 - Close any connection that sends unrecognized junk before the
25058 handshake. Solves an issue noted in bug 4369.
25059 - Improve log messages about managed transports. Resolves ticket 5070.
25060 - Tag a bridge's descriptor as "never to be sent unencrypted".
25061 This shouldn't matter, since bridges don't open non-anonymous
25062 connections to the bridge authority and don't allow unencrypted
25063 directory connections from clients, but we might as well make
25064 sure. Closes bug 5139.
25065 - Expose our view of whether we have gone dormant to the controller,
25066 via a new "GETINFO dormant" value. Torbutton and other controllers
25067 can use this to avoid doing periodic requests through Tor while
25068 it's dormant (bug 4718). Fixes bug 5954.
25069 - Tell GCC and Clang to check for any errors in format strings passed
25070 to the tor_v*(print|scan)f functions.
25071 - Update to the May 1 2012 Maxmind GeoLite Country database.
25073 o Minor bugfixes (already included in 0.2.2.36):
25074 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
25075 Fixes bug 5346; bugfix on 0.0.8pre3.
25076 - Correct parsing of certain date types in parse_http_time().
25077 Without this patch, If-Modified-Since would behave
25078 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
25079 Esteban Manchado Velázques.
25080 - Make our number-parsing functions always treat too-large values
25081 as an error, even when those values exceed the width of the
25082 underlying type. Previously, if the caller provided these
25083 functions with minima or maxima set to the extreme values of the
25084 underlying integer type, these functions would return those
25085 values on overflow rather than treating overflow as an error.
25086 Fixes part of bug 5786; bugfix on 0.0.9.
25087 - If we hit the error case where routerlist_insert() replaces an
25088 existing (old) server descriptor, make sure to remove that
25089 server descriptor from the old_routers list. Fix related to bug
25090 1776. Bugfix on 0.2.2.18-alpha.
25091 - Clarify the behavior of MaxCircuitDirtiness with hidden service
25092 circuits. Fixes issue 5259.
25094 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
25095 - Prevent a null-pointer dereference when receiving a data cell
25096 for a nonexistent stream when the circuit in question has an
25097 empty deliver window. We don't believe this is triggerable,
25098 since we don't currently allow deliver windows to become empty,
25099 but the logic is tricky enough that it's better to make the code
25100 robust. Fixes bug 5541; bugfix on 0.0.2pre14.
25101 - Fix a memory leak when trying to launch a DNS request when the
25102 network is disabled or the nameservers are unconfigurable. Fixes
25103 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
25104 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
25105 - Don't hold a Windows file handle open for every file mapping;
25106 the file mapping handle is sufficient. Fixes bug 5951; bugfix on
25108 - Avoid O(n^2) performance characteristics when parsing a large
25109 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
25110 - Format more doubles with %f, not %lf. Patch from grarpamp to make
25111 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
25113 - Make our replacement implementation of strtok_r() compatible with
25114 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
25115 bugfix on 0.2.2.1-alpha.
25116 - Fix a NULL-pointer dereference on a badly formed
25117 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
25118 bugfix on 0.2.2.9-alpha.
25119 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
25120 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
25121 - Defensively refactor rend_mid_rendezvous() so that protocol
25122 violations and length checks happen in the beginning. Fixes
25124 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
25125 that IPv6 stuff will compile on MSVC, and compilation issues
25126 will be easier to track down. Fixes bug 5861.
25128 o Minor bugfixes (correctness, on 0.2.2.x and earlier):
25129 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
25130 resource exhaustion, so that clients can adjust their load to
25131 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
25132 started using END_STREAM_REASON_RESOURCELIMIT.
25133 - Don't check for whether the address we're using for outbound
25134 connections has changed until after the outbound connection has
25135 completed. On Windows, getsockname() doesn't succeed until the
25136 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
25137 - If the configuration tries to set MyFamily on a bridge, refuse to
25138 do so, and warn about the security implications. Fixes bug 4657;
25139 bugfix on 0.2.0.3-alpha.
25140 - If the client fails to set a reasonable set of ciphersuites
25141 during its v2 handshake renegotiation, allow the renegotiation to
25142 continue nevertheless (i.e. send all the required certificates).
25143 Fixes bug 4591; bugfix on 0.2.0.20-rc.
25144 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
25145 option is set to 0 (which Vidalia version 0.2.16 now does when
25146 a SAVECONF attempt fails), perform other actions that SIGHUP
25147 usually causes (like reopening the logs). Fixes bug 5095; bugfix
25149 - If we fail to write a microdescriptor to the disk cache, do not
25150 continue replacing the old microdescriptor file. Fixes bug 2954;
25151 bugfix on 0.2.2.6-alpha.
25152 - Exit nodes don't need to fetch certificates for authorities that
25153 they don't recognize; only directory authorities, bridges,
25154 and caches need to do that. Fixes part of bug 2297; bugfix on
25156 - Correctly handle checking the permissions on the parent
25157 directory of a control socket in the root directory. Bug found
25158 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
25160 - When told to add a bridge with the same digest as a preexisting
25161 bridge but a different addr:port, change the addr:port as
25162 requested. Previously we would not notice the change. Fixes half
25163 of bug 5603; fix on 0.2.2.26-beta.
25164 - End AUTHCHALLENGE error messages (in the control protocol) with
25165 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
25167 o Minor bugfixes (on 0.2.3.x):
25168 - Turn an assertion (that the number of handshakes received as a
25169 server is not < 1) into a warning. Fixes bug 4873; bugfix on
25171 - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
25172 we had reversed them when the answer was cached.) Fixes bug
25173 5723; bugfix on 0.2.3.1-alpha.
25174 - Work correctly on Linux systems with accept4 support advertised in
25175 their headers, but without accept4 support in the kernel. Fix
25176 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
25177 - When told to add a bridge with the same addr:port as a preexisting
25178 bridge but a different transport, change the transport as
25179 requested. Previously we would not notice the change. Fixes half
25180 of bug 5603; fix on 0.2.3.2-alpha.
25181 - Avoid a "double-reply" warning when replying to a SOCKS request
25182 with a parse error. Patch from Fabian Keil. Fixes bug 4108;
25183 bugfix on 0.2.3.4-alpha.
25184 - Fix a bug where a bridge authority crashes if it has seen no
25185 directory requests when it's time to write statistics to disk.
25186 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
25188 - Don't try to open non-control listeners when DisableNetwork is set.
25189 Previously, we'd open all listeners, then immediately close them.
25190 Fixes bug 5604; bugfix on 0.2.3.9-alpha.
25191 - Don't abort the managed proxy protocol if the managed proxy
25192 sends us an unrecognized line; ignore it instead. Fixes bug
25193 5910; bugfix on 0.2.3.9-alpha.
25194 - Fix a compile warning in crypto.c when compiling with clang 3.1.
25195 Fixes bug 5969, bugfix on 0.2.3.9-alpha.
25196 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
25197 Fixes bug 5355; bugfix on 0.2.3.11-alpha.
25198 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
25199 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
25200 - Resolve numerous small warnings and build issues with MSVC. Resolves
25203 o Documentation fixes:
25204 - Improve the manual's documentation for the NT Service command-line
25205 options. Addresses ticket 3964.
25206 - Clarify SessionGroup documentation slightly; resolves ticket 5437.
25207 - Document the changes to the ORPort and DirPort options, and the
25208 fact that {OR/Dir}ListenAddress is now unnecessary (and
25209 therefore deprecated). Resolves ticket 5597.
25212 - Remove the torrc.bridge file: we don't use it for anything, and
25213 it had become badly desynchronized from torrc.sample. Resolves
25217 Changes in version 0.2.2.36 - 2012-05-24
25218 Tor 0.2.2.36 updates the addresses for two of the eight directory
25219 authorities, fixes some potential anonymity and security issues,
25220 and fixes several crash bugs.
25222 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
25223 known flaws, and nobody should be using them. You should upgrade. If
25224 you're using a Linux or BSD and its packages are obsolete, stop using
25225 those packages and upgrade anyway.
25227 o Directory authority changes:
25228 - Change IP address for maatuska (v3 directory authority).
25229 - Change IP address for ides (v3 directory authority), and rename
25233 - When building or running with any version of OpenSSL earlier
25234 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
25235 versions have a bug (CVE-2011-4576) in which their block cipher
25236 padding includes uninitialized data, potentially leaking sensitive
25237 information to any peer with whom they make a SSLv3 connection. Tor
25238 does not use SSL v3 by default, but a hostile client or server
25239 could force an SSLv3 connection in order to gain information that
25240 they shouldn't have been able to get. The best solution here is to
25241 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
25242 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
25243 to make sure that the bug can't happen.
25244 - Never use a bridge or a controller-supplied node as an exit, even
25245 if its exit policy allows it. Found by wanoskarnet. Fixes bug
25246 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
25247 and 0.2.0.3-alpha (for bridge-purpose descriptors).
25248 - Only build circuits if we have a sufficient threshold of the total
25249 descriptors that are marked in the consensus with the "Exit"
25250 flag. This mitigates an attack proposed by wanoskarnet, in which
25251 all of a client's bridges collude to restrict the exit nodes that
25252 the client knows about. Fixes bug 5343.
25253 - Provide controllers with a safer way to implement the cookie
25254 authentication mechanism. With the old method, if another locally
25255 running program could convince a controller that it was the Tor
25256 process, then that program could trick the controller into telling
25257 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
25258 authentication method uses a challenge-response approach to prevent
25259 this attack. Fixes bug 5185; implements proposal 193.
25262 - Avoid logging uninitialized data when unable to decode a hidden
25263 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
25264 - Avoid a client-side assertion failure when receiving an INTRODUCE2
25265 cell on a general purpose circuit. Fixes bug 5644; bugfix on
25267 - Fix builds when the path to sed, openssl, or sha1sum contains
25268 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
25270 - Correct our replacements for the timeradd() and timersub() functions
25271 on platforms that lack them (for example, Windows). The timersub()
25272 function is used when expiring circuits, while timeradd() is
25273 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
25274 bugfix on 0.2.2.24-alpha.
25275 - Fix the SOCKET_OK test that we use to tell when socket
25276 creation fails so that it works on Win64. Fixes part of bug 4533;
25277 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
25280 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
25281 Fixes bug 5346; bugfix on 0.0.8pre3.
25282 - Make our number-parsing functions always treat too-large values
25283 as an error, even when those values exceed the width of the
25284 underlying type. Previously, if the caller provided these
25285 functions with minima or maxima set to the extreme values of the
25286 underlying integer type, these functions would return those
25287 values on overflow rather than treating overflow as an error.
25288 Fixes part of bug 5786; bugfix on 0.0.9.
25289 - Older Linux kernels erroneously respond to strange nmap behavior
25290 by having accept() return successfully with a zero-length
25291 socket. When this happens, just close the connection. Previously,
25292 we would try harder to learn the remote address: but there was
25293 no such remote address to learn, and our method for trying to
25294 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
25295 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
25296 - Correct parsing of certain date types in parse_http_time().
25297 Without this patch, If-Modified-Since would behave
25298 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
25299 Esteban Manchado Velázques.
25300 - Change the BridgePassword feature (part of the "bridge community"
25301 design, which is not yet implemented) to use a time-independent
25302 comparison. The old behavior might have allowed an adversary
25303 to use timing to guess the BridgePassword value. Fixes bug 5543;
25304 bugfix on 0.2.0.14-alpha.
25305 - Detect and reject certain misformed escape sequences in
25306 configuration values. Previously, these values would cause us
25307 to crash if received in a torrc file or over an authenticated
25308 control port. Bug found by Esteban Manchado Velázquez, and
25309 independently by Robert Connolly from Matta Consulting who further
25310 noted that it allows a post-authentication heap overflow. Patch
25311 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
25312 bugfix on 0.2.0.16-alpha.
25313 - Fix a compile warning when using the --enable-openbsd-malloc
25314 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
25315 - During configure, detect when we're building with clang version
25316 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
25317 CFLAGS. clang doesn't support them yet.
25318 - When sending an HTTP/1.1 proxy request, include a Host header.
25319 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
25320 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
25321 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
25322 - If we hit the error case where routerlist_insert() replaces an
25323 existing (old) server descriptor, make sure to remove that
25324 server descriptor from the old_routers list. Fix related to bug
25325 1776. Bugfix on 0.2.2.18-alpha.
25327 o Minor bugfixes (documentation and log messages):
25328 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
25329 Fixes bug 4856; bugfix on Tor 0.0.6.
25330 - Update "ClientOnly" man page entry to explain that there isn't
25331 really any point to messing with it. Resolves ticket 5005.
25332 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
25333 directory authority option (introduced in Tor 0.2.2.34).
25334 - Downgrade the "We're missing a certificate" message from notice
25335 to info: people kept mistaking it for a real problem, whereas it
25336 is seldom the problem even when we are failing to bootstrap. Fixes
25337 bug 5067; bugfix on 0.2.0.10-alpha.
25338 - Correctly spell "connect" in a log message on failure to create a
25339 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
25340 - Clarify the behavior of MaxCircuitDirtiness with hidden service
25341 circuits. Fixes issue 5259.
25344 - Directory authorities now reject versions of Tor older than
25345 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
25346 inclusive. These versions accounted for only a small fraction of
25347 the Tor network, and have numerous known security issues. Resolves
25349 - Update to the May 1 2012 Maxmind GeoLite Country database.
25352 - When sending or relaying a RELAY_EARLY cell, we used to convert
25353 it to a RELAY cell if the connection was using the v1 link
25354 protocol. This was a workaround for older versions of Tor, which
25355 didn't handle RELAY_EARLY cells properly. Now that all supported
25356 versions can handle RELAY_EARLY cells, and now that we're enforcing
25357 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
25358 remove this workaround. Addresses bug 4786.
25361 Changes in version 0.2.3.15-alpha - 2012-04-30
25362 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
25363 the development branch build on Windows again.
25365 o Minor bugfixes (on 0.2.2.x and earlier):
25366 - Make sure that there are no unhandled pending TLS errors before
25367 reading from a TLS stream. We had checks in 0.1.0.3-rc, but
25368 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
25369 Bugfix on 0.1.0.5-rc; fixes bug 4528.
25370 - Fix an assert that directory authorities could trigger on sighup
25371 during some configuration state transitions. We now don't treat
25372 it as a fatal error when the new descriptor we just generated in
25373 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
25374 - After we pick a directory mirror, we would refuse to use it if
25375 it's in our ExcludeExitNodes list, resulting in mysterious failures
25376 to bootstrap for people who just wanted to avoid exiting from
25377 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
25378 - When building with --enable-static-tor on OpenBSD, do not
25379 erroneously attempt to link -lrt. Fixes bug 5103.
25381 o Minor bugfixes (on 0.2.3.x):
25382 - When Tor is built with kernel headers from a recent (last few
25383 years) Linux kernel, do not fail to run on older (pre-2.6.28
25384 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
25385 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
25386 and 0.2.3.12-alpha.
25387 - Fix compilation with miniupnpc version 1.6; patch from
25388 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
25389 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
25390 on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
25391 - Fix compilation on platforms without unistd.h, or where environ
25392 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
25395 - Directory authorities are now a little more lenient at accepting
25396 older router descriptors, or newer router descriptors that don't
25397 make big changes. This should help ameliorate past and future
25398 issues where routers think they have uploaded valid descriptors,
25399 but the authorities don't think so. Fix for ticket 2479.
25400 - Make the code that clients use to detect an address change be
25401 IPv6-aware, so that it won't fill clients' logs with error
25402 messages when trying to get the IPv4 address of an IPv6
25403 connection. Implements ticket 5537.
25405 o Removed features:
25406 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
25407 authorities needed to use it for a while to keep the network working
25408 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
25409 that was six months ago. As of now, it should no longer be needed
25413 Changes in version 0.2.3.14-alpha - 2012-04-23
25414 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
25415 candidate. It also dramatically speeds up AES: fast relays should
25416 consider switching to the newer OpenSSL library.
25418 o Directory authority changes:
25419 - Change IP address for ides (v3 directory authority), and rename
25423 - Avoid logging uninitialized data when unable to decode a hidden
25424 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
25425 - Avoid a client-side assertion failure when receiving an INTRODUCE2
25426 cell on a general purpose circuit. Fixes bug 5644; bugfix on
25428 - If authorities are unable to get a v2 consensus document from other
25429 directory authorities, they no longer fall back to fetching
25430 them from regular directory caches. Fixes bug 5635; bugfix on
25431 0.2.2.26-beta, where routers stopped downloading v2 consensus
25432 documents entirely.
25433 - When we start a Tor client with a normal consensus already cached,
25434 be willing to download a microdescriptor consensus. Fixes bug 4011;
25435 fix on 0.2.3.1-alpha.
25437 o Major features (performance):
25438 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
25439 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
25440 vectorized AES implementations as appropriate. These can be much,
25441 much faster than other AES implementations.
25443 o Minor bugfixes (0.2.2.x and earlier):
25444 - Don't launch more than 10 service-side introduction-point circuits
25445 for a hidden service in five minutes. Previously, we would consider
25446 launching more introduction-point circuits if at least one second
25447 had passed without any introduction-point circuits failing. Fixes
25448 bug 4607; bugfix on 0.0.7pre1.
25449 - Change the BridgePassword feature (part of the "bridge community"
25450 design, which is not yet implemented) to use a time-independent
25451 comparison. The old behavior might have allowed an adversary
25452 to use timing to guess the BridgePassword value. Fixes bug 5543;
25453 bugfix on 0.2.0.14-alpha.
25454 - Enforce correct return behavior of tor_vsscanf() when the '%%'
25455 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
25456 - When sending an HTTP/1.1 proxy request, include a Host header.
25457 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
25458 - Don't log that we have "decided to publish new relay descriptor"
25459 unless we are actually publishing a descriptor. Fixes bug 3942;
25460 bugfix on 0.2.2.28-beta.
25462 o Minor bugfixes (0.2.3.x):
25463 - Fix a bug where a bridge authority crashes (on a failed assert)
25464 if it has seen no directory requests when it's time to write
25465 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
25466 - Fix bug stomping on ORPort option NoListen and ignoring option
25467 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
25468 - In the testsuite, provide a large enough buffer in the tor_sscanf
25469 unit test. Otherwise we'd overrun that buffer and crash during
25470 the unit tests. Found by weasel. Fixes bug 5449; bugfix on
25472 - Make sure we create the keys directory if it doesn't exist and we're
25473 about to store the dynamic Diffie-Hellman parameters. Fixes bug
25474 5572; bugfix on 0.2.3.13-alpha.
25475 - Fix a small memory leak when trying to decode incorrect base16
25476 authenticator during SAFECOOKIE authentication. Found by
25477 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
25480 - Add more information to a log statement that might help track down
25481 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
25482 non-IP address" messages (or any Bug messages, for that matter!),
25483 please let us know about it.
25484 - Relays now understand an IPv6 address when they get one from a
25485 directory server. Resolves ticket 4875.
25486 - Resolve IPv6 addresses in bridge and entry statistics to country
25487 code "??" which means we at least count them. Resolves ticket 5053;
25488 improves on 0.2.3.9-alpha.
25489 - Update to the April 3 2012 Maxmind GeoLite Country database.
25490 - Begin a doc/state-contents.txt file to explain the contents of
25491 the Tor state file. Fixes bug 2987.
25493 o Default torrc changes:
25494 - Stop listing "socksport 9050" in torrc.sample. We open a socks
25495 port on 9050 by default anyway, so this should not change anything
25497 - Stop mentioning the deprecated *ListenAddress options in
25498 torrc.sample. Fixes bug 5438.
25499 - Document unit of bandwidth related options in sample torrc.
25502 o Removed features:
25503 - The "torify" script no longer supports the "tsocks" socksifier
25504 tool, since tsocks doesn't support DNS and UDP right for Tor.
25505 Everyone should be using torsocks instead. Fixes bugs 3530 and
25506 5180. Based on a patch by "ugh".
25508 o Code refactoring:
25509 - Change the symmetric cipher interface so that creating and
25510 initializing a stream cipher are no longer separate functions.
25511 - Remove all internal support for unpadded RSA. We never used it, and
25512 it would be a bad idea to start.
25515 Changes in version 0.2.3.13-alpha - 2012-03-26
25516 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
25517 in managed pluggable transports, as well as providing other cleanups
25518 that get us closer to a release candidate.
25520 o Directory authority changes:
25521 - Change IP address for maatuska (v3 directory authority).
25524 - Provide controllers with a safer way to implement the cookie
25525 authentication mechanism. With the old method, if another locally
25526 running program could convince a controller that it was the Tor
25527 process, then that program could trick the controller into telling
25528 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
25529 authentication method uses a challenge-response approach to prevent
25530 this attack. Fixes bug 5185, implements proposal 193.
25531 - Never use a bridge or a controller-supplied node as an exit, even
25532 if its exit policy allows it. Found by wanoskarnet. Fixes bug
25533 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
25534 and 0.2.0.3-alpha (for bridge-purpose descriptors).
25535 - Only build circuits if we have a sufficient threshold of the total
25536 descriptors that are marked in the consensus with the "Exit"
25537 flag. This mitigates an attack proposed by wanoskarnet, in which
25538 all of a client's bridges collude to restrict the exit nodes that
25539 the client knows about. Fixes bug 5343.
25541 o Major bugfixes (on Tor 0.2.3.x):
25542 - Avoid an assert when managed proxies like obfsproxy are configured,
25543 and we receive HUP signals or setconf attempts too rapidly. This
25544 situation happens most commonly when Vidalia tries to attach to
25545 Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
25546 bugfix on 0.2.3.6-alpha.
25547 - Fix a relay-side pluggable transports bug where managed proxies were
25548 unreachable from the Internet, because Tor asked them to bind on
25549 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
25550 - Stop discarding command-line arguments when TestingTorNetwork
25551 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
25552 0.2.3.9-alpha, where task 4552 added support for two layers of
25554 - Resume allowing the unit tests to run in gdb. This was accidentally
25555 made impossible when the DisableDebuggerAttachment option was
25556 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
25557 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
25558 0.2.3.11-alpha. Reported by Anthony G. Basile.
25560 o Minor bugfixes (on 0.2.2.x and earlier):
25561 - Ensure we don't cannibalize circuits that are longer than three hops
25562 already, so we don't end up making circuits with 5 or more
25563 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
25564 0.1.0.1-rc which introduced cannibalization.
25565 - Detect and reject certain misformed escape sequences in
25566 configuration values. Previously, these values would cause us
25567 to crash if received in a torrc file or over an authenticated
25568 control port. Bug found by Esteban Manchado Velázquez, and
25569 independently by Robert Connolly from Matta Consulting who further
25570 noted that it allows a post-authentication heap overflow. Patch
25571 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
25572 bugfix on 0.2.0.16-alpha.
25573 - Fix a compile warning when using the --enable-openbsd-malloc
25574 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
25575 - Directory caches no longer refuse to clean out descriptors because
25576 of missing v2 networkstatus documents, unless they're configured
25577 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
25578 0.2.2.26-beta. Patch by Daniel Bryg.
25579 - Update to the latest version of the tinytest unit testing framework.
25580 This includes a couple of bugfixes that can be relevant for
25581 running forked unit tests on Windows, and removes all reserved
25584 o Minor bugfixes (on 0.2.3.x):
25585 - On a failed pipe() call, don't leak file descriptors. Fixes bug
25586 4296; bugfix on 0.2.3.1-alpha.
25587 - Spec conformance: on a v3 handshake, do not send a NETINFO cell
25588 until after we have received a CERTS cell. Fixes bug 4361; bugfix
25589 on 0.2.3.6-alpha. Patch by "frosty".
25590 - When binding to an IPv6 address, set the IPV6_V6ONLY socket
25591 option, so that the IP stack doesn't decide to use it for IPv4
25592 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
25593 - Ensure that variables set in Tor's environment cannot override
25594 environment variables that Tor passes to a managed
25595 pluggable-transport proxy. Previously, Tor would pass every
25596 variable in its environment to managed proxies along with the new
25597 ones, in such a way that on many operating systems, the inherited
25598 environment variables would override those which Tor tried to
25599 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
25600 bugfix on 0.2.3.9-alpha for Windows.
25603 - A wide variety of new unit tests by Esteban Manchado Velázquez.
25604 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
25605 - Update to the March 6 2012 Maxmind GeoLite Country database.
25608 Changes in version 0.2.3.12-alpha - 2012-02-13
25609 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
25610 to use bridges that run Tor 0.2.2.x, and resolves several big bugs
25611 when Tor is configured to use a pluggable transport like obfsproxy.
25614 - Fix builds when the path to sed, openssl, or sha1sum contains
25615 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
25617 - Set the SO_REUSEADDR socket option before we call bind() on outgoing
25618 connections. This change should allow busy exit relays to stop
25619 running out of available sockets as quickly. Fixes bug 4950;
25620 bugfix on 0.2.2.26-beta.
25621 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
25622 would ask the bridge for microdescriptors, which are only supported
25623 in 0.2.3.x, and then fail to bootstrap when it didn't get the
25624 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
25625 - Properly set up obfsproxy's environment when in managed mode. The
25626 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
25627 and when you run your Tor as a daemon, there's no HOME. Fixes bugs
25628 5076 and 5082; bugfix on 0.2.3.6-alpha.
25631 - Use the dead_strip option when building Tor on OS X. This reduces
25632 binary size by almost 19% when linking openssl and libevent
25633 statically, which we do for Tor Browser Bundle.
25634 - Fix broken URLs in the sample torrc file, and tell readers about
25635 the OutboundBindAddress, ExitPolicyRejectPrivate, and
25636 PublishServerDescriptor options. Addresses bug 4652.
25637 - Update to the February 7 2012 Maxmind GeoLite Country database.
25640 - Downgrade the "We're missing a certificate" message from notice
25641 to info: people kept mistaking it for a real problem, whereas it
25642 is seldom the problem even when we are failing to bootstrap. Fixes
25643 bug 5067; bugfix on 0.2.0.10-alpha.
25644 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
25645 managed pluggable transport server proxy's environment.
25646 Previously, we would put it there, even though Tor doesn't
25647 implement an 'extended server port' yet, and even though Tor
25648 almost certainly isn't listening at that address. For now, we set
25649 it to an empty string to avoid crashing older obfsproxies. Bugfix
25651 - Log the heartbeat message every HeartbeatPeriod seconds, not every
25652 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
25653 0.2.3.1-alpha. Bug reported by Scott Bennett.
25654 - Calculate absolute paths correctly on Windows. Fixes bug 4973;
25655 bugfix on 0.2.3.11-alpha.
25656 - Update "ClientOnly" man page entry to explain that there isn't
25657 really any point to messing with it. Resolves ticket 5005.
25658 - Use the correct CVE number for CVE-2011-4576 in our comments and
25659 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
25662 o Code simplifications and refactoring:
25663 - Use the _WIN32 macro throughout our code to detect Windows.
25664 (Previously we had used the obsolete 'WIN32' and the idiosyncratic
25668 Changes in version 0.2.3.11-alpha - 2012-01-22
25669 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
25670 the last step of the plan to limit maximum circuit length, includes
25671 a wide variety of hidden service performance and correctness fixes,
25672 works around an OpenSSL security flaw if your distro is too stubborn
25673 to upgrade, and fixes a bunch of smaller issues.
25676 - Now that Tor 0.2.0.x is completely deprecated, enable the final
25677 part of "Proposal 110: Avoiding infinite length circuits" by
25678 refusing all circuit-extend requests that do not use a relay_early
25679 cell. This change helps Tor resist a class of denial-of-service
25680 attacks by limiting the maximum circuit length.
25681 - Adjust the number of introduction points that a hidden service
25682 will try to maintain based on how long its introduction points
25683 remain in use and how many introductions they handle. Fixes
25685 - Try to use system facilities for enumerating local interface
25686 addresses, before falling back to our old approach (which was
25687 binding a UDP socket, and calling getsockname() on it). That
25688 approach was scaring OS X users whose draconian firewall
25689 software warned about binding to UDP sockets, regardless of
25690 whether packets were sent. Now we try to use getifaddrs(),
25691 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
25692 system supports. Resolves ticket 1827.
25694 o Major security workaround:
25695 - When building or running with any version of OpenSSL earlier
25696 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
25697 versions have a bug (CVE-2011-4576) in which their block cipher
25698 padding includes uninitialized data, potentially leaking sensitive
25699 information to any peer with whom they make a SSLv3 connection. Tor
25700 does not use SSL v3 by default, but a hostile client or server
25701 could force an SSLv3 connection in order to gain information that
25702 they shouldn't have been able to get. The best solution here is to
25703 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
25704 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
25705 to make sure that the bug can't happen.
25708 - Fix the SOCKET_OK test that we use to tell when socket
25709 creation fails so that it works on Win64. Fixes part of bug 4533;
25710 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
25711 - Correct our replacements for the timeradd() and timersub() functions
25712 on platforms that lack them (for example, Windows). The timersub()
25713 function is used when expiring circuits, while timeradd() is
25714 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
25715 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
25716 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
25717 that was fixed in OpenSSL 1.0.0a. We test for the counter mode
25718 bug at runtime, not compile time, because some distributions hack
25719 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
25720 on 0.2.3.9-alpha. Found by Pascal.
25722 o Minor features (controller):
25723 - Use absolute path names when reporting the torrc filename in the
25724 control protocol, so a controller can more easily find the torrc
25725 file. Resolves bug 1101.
25726 - Extend the control protocol to report flags that control a circuit's
25727 path selection in CIRC events and in replies to 'GETINFO
25728 circuit-status'. Implements part of ticket 2411.
25729 - Extend the control protocol to report the hidden service address
25730 and current state of a hidden-service-related circuit in CIRC
25731 events and in replies to 'GETINFO circuit-status'. Implements part
25733 - When reporting the path to the cookie file to the controller,
25734 give an absolute path. Resolves ticket 4881.
25735 - Allow controllers to request an event notification whenever a
25736 circuit is cannibalized or its purpose is changed. Implements
25737 part of ticket 3457.
25738 - Include the creation time of a circuit in CIRC and CIRC2
25739 control-port events and the list produced by the 'GETINFO
25740 circuit-status' control-port command.
25742 o Minor features (directory authorities):
25743 - Directory authorities now reject versions of Tor older than
25744 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
25745 inclusive. These versions accounted for only a small fraction of
25746 the Tor network, and have numerous known security issues. Resolves
25748 - Authority operators can now vote for all relays in a given
25749 set of countries to be BadDir/BadExit/Invalid/Rejected.
25750 - Provide two consensus parameters (FastFlagMinThreshold and
25751 FastFlagMaxThreshold) to control the range of allowable bandwidths
25752 for the Fast directory flag. These allow authorities to run
25753 experiments on appropriate requirements for being a "Fast" node.
25754 The AuthDirFastGuarantee config value still applies. Implements
25756 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
25757 directory authority option (introduced in Tor 0.2.2.34).
25759 o Minor features (other):
25760 - Don't disable the DirPort when we cannot exceed our AccountingMax
25761 limit during this interval because the effective bandwidthrate is
25762 low enough. This is useful in a situation where AccountMax is only
25763 used as an additional safeguard or to provide statistics.
25764 - Prepend an informative header to generated dynamic_dh_params files.
25765 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
25766 EntryNodes will have no effect. Resolves issue 2571.
25767 - Log more useful messages when we fail to disable debugger
25769 - Log which authority we're missing votes from when we go to fetch
25770 them from the other auths.
25771 - Log (at debug level) whenever a circuit's purpose is changed.
25772 - Add missing documentation for the MaxClientCircuitsPending,
25773 UseMicrodescriptors, UserspaceIOCPBuffers, and
25774 _UseFilteringSSLBufferevents options, all introduced during
25775 the 0.2.3.x series.
25776 - Update to the January 3 2012 Maxmind GeoLite Country database.
25778 o Minor bugfixes (hidden services):
25779 - Don't close hidden service client circuits which have almost
25780 finished connecting to their destination when they reach
25781 the normal circuit-build timeout. Previously, we would close
25782 introduction circuits which are waiting for an acknowledgement
25783 from the introduction point, and rendezvous circuits which have
25784 been specified in an INTRODUCE1 cell sent to a hidden service,
25785 after the normal CBT. Now, we mark them as 'timed out', and launch
25786 another rendezvous attempt in parallel. This behavior change can
25787 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
25788 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
25789 - Don't close hidden-service-side rendezvous circuits when they
25790 reach the normal circuit-build timeout. This behavior change can
25791 be disabled using the new
25792 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
25793 remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
25794 - Make sure we never mark the wrong rendezvous circuit as having
25795 had its introduction cell acknowledged by the introduction-point
25796 relay. Previously, when we received an INTRODUCE_ACK cell on a
25797 client-side hidden-service introduction circuit, we might have
25798 marked a rendezvous circuit other than the one we specified in
25799 the INTRODUCE1 cell as INTRO_ACKED, which would have produced
25800 a warning message and interfered with the hidden service
25801 connection-establishment process. Fixes bug 4759; bugfix on
25802 0.2.3.3-alpha, when we added the stream-isolation feature which
25803 might cause Tor to open multiple rendezvous circuits for the same
25805 - Don't trigger an assertion failure when we mark a new client-side
25806 hidden-service introduction circuit for close during the process
25807 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
25810 o Minor bugfixes (log messages):
25811 - Correctly spell "connect" in a log message on failure to create a
25812 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
25814 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
25815 Fixes bug 4856; bugfix on Tor 0.0.6.
25816 - Fix the log message describing how we work around discovering
25817 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
25818 4837; bugfix on 0.2.2.9-alpha.
25819 - When logging about a disallowed .exit name, do not also call it
25820 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
25822 o Minor bugfixes (build fixes):
25823 - During configure, detect when we're building with clang version
25824 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
25825 CFLAGS. clang doesn't support them yet.
25826 - During configure, search for library containing cos function as
25827 libm lives in libcore on some platforms (BeOS/Haiku). Linking
25828 against libm was hard-coded before. Fixes the first part of bug
25829 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
25831 - Detect attempts to build Tor on (as yet hypothetical) versions
25832 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
25833 fix for bug 4533. Bugfix on 0.2.2.28-beta.
25834 - Preprocessor directives should not be put inside the arguments
25835 of a macro. This would break compilation with GCC releases prior
25836 to version 3.3. We would never recommend such an old GCC version,
25837 but it is apparently required for binary compatibility on some
25838 platforms (namely, certain builds of Haiku). Fixes the other part
25839 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
25842 o Minor bugfixes (other):
25843 - Older Linux kernels erroneously respond to strange nmap behavior
25844 by having accept() return successfully with a zero-length
25845 socket. When this happens, just close the connection. Previously,
25846 we would try harder to learn the remote address: but there was
25847 no such remote address to learn, and our method for trying to
25848 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
25849 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
25850 - Fix null-pointer access that could occur if TLS allocation failed.
25851 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
25852 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
25853 accidentally been reverted.
25854 - Fix our implementation of crypto_random_hostname() so it can't
25855 overflow on ridiculously large inputs. (No Tor version has ever
25856 provided this kind of bad inputs, but let's be correct in depth.)
25857 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
25858 - Find more places in the code that should have been testing for
25859 invalid sockets using the SOCKET_OK macro. Required for a fix
25860 for bug 4533. Bugfix on 0.2.2.28-beta.
25861 - Fix an assertion failure when, while running with bufferevents, a
25862 connection finishes connecting after it is marked for close, but
25863 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
25864 - test_util_spawn_background_ok() hardcoded the expected value
25865 for ENOENT to 2. This isn't portable as error numbers are
25866 platform specific, and particularly the hurd has ENOENT at
25867 0x40000002. Construct expected string at runtime, using the correct
25868 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
25869 - Reject attempts to disable DisableDebuggerAttachment while Tor is
25870 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
25871 - Use an appropriate-width type for sockets in tor-fw-helper on
25872 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
25875 - When sending or relaying a RELAY_EARLY cell, we used to convert
25876 it to a RELAY cell if the connection was using the v1 link
25877 protocol. This was a workaround for older versions of Tor, which
25878 didn't handle RELAY_EARLY cells properly. Now that all supported
25879 versions can handle RELAY_EARLY cells, and now that we're enforcing
25880 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
25881 remove this workaround. Addresses bug 4786.
25883 o Code simplifications and refactoring:
25884 - Use OpenSSL's built-in SSL_state_string_long() instead of our
25885 own homebrewed ssl_state_to_string() replacement. Patch from
25886 Emile Snyder. Fixes bug 4653.
25887 - Use macros to indicate OpenSSL versions, so we don't need to worry
25888 about accidental hexadecimal bit shifts.
25889 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
25891 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
25892 - Use the smartlist_add_asprintf() alias more consistently.
25893 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
25894 invalid value, rather than just -1.
25895 - Rename a handful of old identifiers, mostly related to crypto
25896 structures and crypto functions. By convention, our "create an
25897 object" functions are called "type_new()", our "free an object"
25898 functions are called "type_free()", and our types indicate that
25899 they are types only with a final "_t". But a handful of older
25900 types and functions broke these rules, with function names like
25901 "type_create" or "subsystem_op_type", or with type names like
25905 Changes in version 0.2.3.10-alpha - 2011-12-16
25906 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
25907 Tor's buffers code. Absolutely everybody should upgrade.
25909 The bug relied on an incorrect calculation when making data continuous
25910 in one of our IO buffers, if the first chunk of the buffer was
25911 misaligned by just the wrong amount. The miscalculation would allow an
25912 attacker to overflow a piece of heap-allocated memory. To mount this
25913 attack, the attacker would need to either open a SOCKS connection to
25914 Tor's SocksPort (usually restricted to localhost), or target a Tor
25915 instance configured to make its connections through a SOCKS proxy
25916 (which Tor does not do by default).
25918 Good security practice requires that all heap-overflow bugs should be
25919 presumed to be exploitable until proven otherwise, so we are treating
25920 this as a potential code execution attack. Please upgrade immediately!
25921 This bug does not affect bufferevents-based builds of Tor. Special
25922 thanks to "Vektor" for reporting this issue to us!
25924 This release also contains a few minor bugfixes for issues discovered
25928 - Fix a heap overflow bug that could occur when trying to pull
25929 data into the first chunk of a buffer, when that chunk had
25930 already had some data drained from it. Fixes CVE-2011-2778;
25931 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
25934 - If we can't attach streams to a rendezvous circuit when we
25935 finish connecting to a hidden service, clear the rendezvous
25936 circuit's stream-isolation state and try to attach streams
25937 again. Previously, we cleared rendezvous circuits' isolation
25938 state either too early (if they were freshly built) or not at all
25939 (if they had been built earlier and were cannibalized). Bugfix on
25940 0.2.3.3-alpha; fixes bug 4655.
25941 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
25942 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
25943 - Fix an assertion failure when a relay with accounting enabled
25944 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
25947 - Update to the December 6 2011 Maxmind GeoLite Country database.
25950 Changes in version 0.2.2.35 - 2011-12-16
25951 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
25952 buffers code. Absolutely everybody should upgrade.
25954 The bug relied on an incorrect calculation when making data continuous
25955 in one of our IO buffers, if the first chunk of the buffer was
25956 misaligned by just the wrong amount. The miscalculation would allow an
25957 attacker to overflow a piece of heap-allocated memory. To mount this
25958 attack, the attacker would need to either open a SOCKS connection to
25959 Tor's SocksPort (usually restricted to localhost), or target a Tor
25960 instance configured to make its connections through a SOCKS proxy
25961 (which Tor does not do by default).
25963 Good security practice requires that all heap-overflow bugs should be
25964 presumed to be exploitable until proven otherwise, so we are treating
25965 this as a potential code execution attack. Please upgrade immediately!
25966 This bug does not affect bufferevents-based builds of Tor. Special
25967 thanks to "Vektor" for reporting this issue to us!
25969 Tor 0.2.2.35 also fixes several bugs in previous versions, including
25970 crash bugs for unusual configurations, and a long-term bug that
25971 would prevent Tor from starting on Windows machines with draconian
25974 With this release, we remind everyone that 0.2.0.x has reached its
25975 formal end-of-life. Those Tor versions have many known flaws, and
25976 nobody should be using them. You should upgrade -- ideally to the
25977 0.2.2.x series. If you're using a Linux or BSD and its packages are
25978 obsolete, stop using those packages and upgrade anyway.
25980 The Tor 0.2.1.x series is also approaching its end-of-life: it will no
25981 longer receive support after some time in early 2012.
25984 - Fix a heap overflow bug that could occur when trying to pull
25985 data into the first chunk of a buffer, when that chunk had
25986 already had some data drained from it. Fixes CVE-2011-2778;
25987 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
25988 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
25989 that it doesn't attempt to allocate a socketpair. This could cause
25990 some problems on Windows systems with overzealous firewalls. Fix for
25991 bug 4457; workaround for Libevent versions 2.0.1-alpha through
25993 - If we mark an OR connection for close based on a cell we process,
25994 don't process any further cells on it. We already avoid further
25995 reads on marked-for-close connections, but now we also discard the
25996 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
25997 which was the first version where we might mark a connection for
25998 close based on processing a cell on it.
25999 - Correctly sanity-check that we don't underflow on a memory
26000 allocation (and then assert) for hidden service introduction
26001 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
26002 bugfix on 0.2.1.5-alpha.
26003 - Fix a memory leak when we check whether a hidden service
26004 descriptor has any usable introduction points left. Fixes bug
26005 4424. Bugfix on 0.2.2.25-alpha.
26006 - Don't crash when we're running as a relay and don't have a GeoIP
26007 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
26008 we've had in the 0.2.3.x branch already.
26009 - When running as a client, do not print a misleading (and plain
26010 wrong) log message that we're collecting "directory request"
26011 statistics: clients don't collect statistics. Also don't create a
26012 useless (because empty) stats file in the stats/ directory. Fixes
26013 bug 4353; bugfix on 0.2.2.34.
26016 - Detect failure to initialize Libevent. This fix provides better
26017 detection for future instances of bug 4457.
26018 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
26019 function. This was eating up hideously large amounts of time on some
26020 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
26021 - Resolve an integer overflow bug in smartlist_ensure_capacity().
26022 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
26024 - Don't warn about unused log_mutex in log.c when building with
26025 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
26026 0.1.0.6-rc which introduced --disable-threads.
26027 - When configuring, starting, or stopping an NT service, stop
26028 immediately after the service configuration attempt has succeeded
26029 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
26030 - When sending a NETINFO cell, include the original address
26031 received for the other side, not its canonical address. Found
26032 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
26033 - Fix a typo in a hibernation-related log message. Fixes bug 4331;
26034 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
26035 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
26036 occurred when a client tried to fetch a descriptor for a bridge
26037 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
26038 - Backport fixes for a pair of compilation warnings on Windows.
26039 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
26040 - If we had ever tried to call tor_addr_to_str on an address of
26041 unknown type, we would have done a strdup on an uninitialized
26042 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
26043 Reported by "troll_un".
26044 - Correctly detect and handle transient lookup failures from
26045 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
26046 Reported by "troll_un".
26047 - Fix null-pointer access that could occur if TLS allocation failed.
26048 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
26049 - Use tor_socket_t type for listener argument to accept(). Fixes bug
26050 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
26053 - Add two new config options for directory authorities:
26054 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
26055 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
26056 that is always sufficient to satisfy the bandwidth requirement for
26057 the Guard flag. Now it will be easier for researchers to simulate
26058 Tor networks with different values. Resolves ticket 4484.
26059 - When Tor ignores a hidden service specified in its configuration,
26060 include the hidden service's directory in the warning message.
26061 Previously, we would only tell the user that some hidden service
26062 was ignored. Bugfix on 0.0.6; fixes bug 4426.
26063 - Update to the December 6 2011 Maxmind GeoLite Country database.
26065 o Packaging changes:
26066 - Make it easier to automate expert package builds on Windows,
26067 by removing an absolute path from makensis.exe command.
26070 Changes in version 0.2.1.32 - 2011-12-16
26071 Tor 0.2.1.32 backports important security and privacy fixes for
26072 oldstable. This release is intended only for package maintainers and
26073 others who cannot use the 0.2.2 stable series. All others should be
26074 using Tor 0.2.2.x or newer.
26076 The Tor 0.2.1.x series will reach formal end-of-life some time in
26077 early 2012; we will stop releasing patches for it then.
26079 o Major bugfixes (also included in 0.2.2.x):
26080 - Correctly sanity-check that we don't underflow on a memory
26081 allocation (and then assert) for hidden service introduction
26082 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
26083 bugfix on 0.2.1.5-alpha.
26084 - Fix a heap overflow bug that could occur when trying to pull
26085 data into the first chunk of a buffer, when that chunk had
26086 already had some data drained from it. Fixes CVE-2011-2778;
26087 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
26090 - Update to the December 6 2011 Maxmind GeoLite Country database.
26093 Changes in version 0.2.3.9-alpha - 2011-12-08
26094 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
26095 a "DisableNetwork" security feature that bundles can use to avoid
26096 touching the network until bridges are configured, moves forward on
26097 the pluggable transport design, fixes a flaw in the hidden service
26098 design that unnecessarily prevented clients with wrong clocks from
26099 reaching hidden services, and fixes a wide variety of other issues.
26102 - Clients can now connect to private bridges over IPv6. Bridges
26103 still need at least one IPv4 address in order to connect to
26104 other relays. Note that we don't yet handle the case where the
26105 user has two bridge lines for the same bridge (one IPv4, one
26106 IPv6). Implements parts of proposal 186.
26107 - New "DisableNetwork" config option to prevent Tor from launching any
26108 connections or accepting any connections except on a control port.
26109 Bundles and controllers can set this option before letting Tor talk
26110 to the rest of the network, for example to prevent any connections
26111 to a non-bridge address. Packages like Orbot can also use this
26112 option to instruct Tor to save power when the network is off.
26113 - Clients and bridges can now be configured to use a separate
26114 "transport" proxy. This approach makes the censorship arms race
26115 easier by allowing bridges to use protocol obfuscation plugins. It
26116 implements the "managed proxy" part of proposal 180 (ticket 3472).
26117 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
26118 implementation. It makes AES_CTR about 7% faster than our old one
26119 (which was about 10% faster than the one OpenSSL used to provide).
26120 Resolves ticket 4526.
26121 - Add a "tor2web mode" for clients that want to connect to hidden
26122 services non-anonymously (and possibly more quickly). As a safety
26123 measure to try to keep users from turning this on without knowing
26124 what they are doing, tor2web mode must be explicitly enabled at
26125 compile time, and a copy of Tor compiled to run in tor2web mode
26126 cannot be used as a normal Tor client. Implements feature 2553.
26127 - Add experimental support for running on Windows with IOCP and no
26128 kernel-space socket buffers. This feature is controlled by a new
26129 "UserspaceIOCPBuffers" config option (off by default), which has
26130 no effect unless Tor has been built with support for bufferevents,
26131 is running on Windows, and has enabled IOCP. This may, in the long
26132 run, help solve or mitigate bug 98.
26133 - Use a more secure consensus parameter voting algorithm. Now at
26134 least three directory authorities or a majority of them must
26135 vote on a given parameter before it will be included in the
26136 consensus. Implements proposal 178.
26139 - Hidden services now ignore the timestamps on INTRODUCE2 cells.
26140 They used to check that the timestamp was within 30 minutes
26141 of their system clock, so they could cap the size of their
26142 replay-detection cache, but that approach unnecessarily refused
26143 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
26144 the v3 intro-point protocol (the first one which sent a timestamp
26145 field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
26146 - Only use the EVP interface when AES acceleration is enabled,
26147 to avoid a 5-7% performance regression. Resolves issue 4525;
26148 bugfix on 0.2.3.8-alpha.
26150 o Privacy/anonymity features (bridge detection):
26151 - Make bridge SSL certificates a bit more stealthy by using random
26152 serial numbers, in the same fashion as OpenSSL when generating
26153 self-signed certificates. Implements ticket 4584.
26154 - Introduce a new config option "DynamicDHGroups", enabled by
26155 default, which provides each bridge with a unique prime DH modulus
26156 to be used during SSL handshakes. This option attempts to help
26157 against censors who might use the Apache DH modulus as a static
26158 identifier for bridges. Addresses ticket 4548.
26160 o Minor features (new/different config options):
26161 - New configuration option "DisableDebuggerAttachment" (on by default)
26162 to prevent basic debugging attachment attempts by other processes.
26163 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
26164 - Allow MapAddress directives to specify matches against super-domains,
26165 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
26166 Implements issue 933.
26167 - Slightly change behavior of "list" options (that is, config
26168 options that can appear more than once) when they appear both in
26169 torrc and on the command line. Previously, the command-line options
26170 would be appended to the ones from torrc. Now, the command-line
26171 options override the torrc options entirely. This new behavior
26172 allows the user to override list options (like exit policies and
26173 ports to listen on) from the command line, rather than simply
26174 appending to the list.
26175 - You can get the old (appending) command-line behavior for "list"
26176 options by prefixing the option name with a "+".
26177 - You can remove all the values for a "list" option from the command
26178 line without adding any new ones by prefixing the option name
26180 - Add experimental support for a "defaults" torrc file to be parsed
26181 before the regular torrc. Torrc options override the defaults file's
26182 options in the same way that the command line overrides the torrc.
26183 The SAVECONF controller command saves only those options which
26184 differ between the current configuration and the defaults file. HUP
26185 reloads both files. (Note: This is an experimental feature; its
26186 behavior will probably be refined in future 0.2.3.x-alpha versions
26187 to better meet packagers' needs.) Implements task 4552.
26190 - Try to make the introductory warning message that Tor prints on
26191 startup more useful for actually finding help and information.
26192 Resolves ticket 2474.
26193 - Running "make version" now displays the version of Tor that
26194 we're about to build. Idea from katmagic; resolves issue 4400.
26195 - Expire old or over-used hidden service introduction points.
26196 Required by fix for bug 3460.
26197 - Move the replay-detection cache for the RSA-encrypted parts of
26198 INTRODUCE2 cells to the introduction point data structures.
26199 Previously, we would use one replay-detection cache per hidden
26200 service. Required by fix for bug 3460.
26201 - Reduce the lifetime of elements of hidden services' Diffie-Hellman
26202 public key replay-detection cache from 60 minutes to 5 minutes. This
26203 replay-detection cache is now used only to detect multiple
26204 INTRODUCE2 cells specifying the same rendezvous point, so we can
26205 avoid launching multiple simultaneous attempts to connect to it.
26207 o Minor bugfixes (on Tor 0.2.2.x and earlier):
26208 - Resolve an integer overflow bug in smartlist_ensure_capacity().
26209 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
26211 - Fix a minor formatting issue in one of tor-gencert's error messages.
26213 - Prevent a false positive from the check-spaces script, by disabling
26214 the "whitespace between function name and (" check for functions
26216 - Fix a log message suggesting that people contact a non-existent
26217 email address. Fixes bug 3448.
26218 - Fix null-pointer access that could occur if TLS allocation failed.
26219 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
26220 - Report a real bootstrap problem to the controller on router
26221 identity mismatch. Previously we just said "foo", which probably
26222 made a lot of sense at the time. Fixes bug 4169; bugfix on
26224 - If we had ever tried to call tor_addr_to_str() on an address of
26225 unknown type, we would have done a strdup() on an uninitialized
26226 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
26227 Reported by "troll_un".
26228 - Correctly detect and handle transient lookup failures from
26229 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
26230 Reported by "troll_un".
26231 - Use tor_socket_t type for listener argument to accept(). Fixes bug
26232 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
26233 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
26234 bug 4532; found by "troll_un".
26236 o Minor bugfixes (on Tor 0.2.3.x):
26237 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
26239 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
26240 circuit for use as a hidden service client's rendezvous point.
26241 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
26242 with help from wanoskarnet.
26243 - Restore behavior of overriding SocksPort, ORPort, and similar
26244 options from the command line. Bugfix on 0.2.3.3-alpha.
26247 - Properly handle the case where the build-tree is not the same
26248 as the source tree when generating src/common/common_sha1.i,
26249 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
26250 bugfix on 0.2.0.1-alpha.
26252 o Code simplifications, cleanups, and refactorings:
26253 - Remove the pure attribute from all functions that used it
26254 previously. In many cases we assigned it incorrectly, because the
26255 functions might assert or call impure functions, and we don't have
26256 evidence that keeping the pure attribute is worthwhile. Implements
26257 changes suggested in ticket 4421.
26258 - Remove some dead code spotted by coverity. Fixes cid 432.
26259 Bugfix on 0.2.3.1-alpha, closes bug 4637.
26262 Changes in version 0.2.3.8-alpha - 2011-11-22
26263 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
26264 socketpair-related bug that has been bothering Windows users. It adds
26265 support to serve microdescriptors to controllers, so Vidalia's network
26266 map can resume listing relays (once Vidalia implements its side),
26267 and adds better support for hardware AES acceleration. Finally, it
26268 starts the process of adjusting the bandwidth cutoff for getting the
26269 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
26270 that tiny relays harm performance more than they help network capacity.
26273 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
26274 that it doesn't attempt to allocate a socketpair. This could cause
26275 some problems on Windows systems with overzealous firewalls. Fix for
26276 bug 4457; workaround for Libevent versions 2.0.1-alpha through
26278 - Correctly sanity-check that we don't underflow on a memory
26279 allocation (and then assert) for hidden service introduction
26280 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
26281 bugfix on 0.2.1.5-alpha.
26282 - Remove the artificially low cutoff of 20KB to guarantee the Fast
26283 flag. In the past few years the average relay speed has picked
26284 up, and while the "top 7/8 of the network get the Fast flag" and
26285 "all relays with 20KB or more of capacity get the Fast flag" rules
26286 used to have the same result, now the top 7/8 of the network has
26287 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
26288 - Fix a rare assertion failure when checking whether a v0 hidden
26289 service descriptor has any usable introduction points left, and
26290 we don't have enough information to build a circuit to the first
26291 intro point named in the descriptor. The HS client code in
26292 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
26293 trigger on (and crash) v0 HS authorities. Fixes bug 4411.
26294 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
26295 - Make bridge authorities not crash when they are asked for their own
26296 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
26297 - When running as a client, do not print a misleading (and plain
26298 wrong) log message that we're collecting "directory request"
26299 statistics: clients don't collect statistics. Also don't create a
26300 useless (because empty) stats file in the stats/ directory. Fixes
26301 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
26304 - Allow Tor controllers like Vidalia to obtain the microdescriptor
26305 for a relay by identity digest or nickname. Previously,
26306 microdescriptors were only available by their own digests, so a
26307 controller would have to ask for and parse the whole microdescriptor
26308 consensus in order to look up a single relay's microdesc. Fixes
26309 bug 3832; bugfix on 0.2.3.1-alpha.
26310 - Use OpenSSL's EVP interface for AES encryption, so that all AES
26311 operations can use hardware acceleration (if present). Resolves
26314 o Minor bugfixes (on 0.2.2.x and earlier):
26315 - Detect failure to initialize Libevent. This fix provides better
26316 detection for future instances of bug 4457.
26317 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
26318 function. This was eating up hideously large amounts of time on some
26319 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
26320 - Don't warn about unused log_mutex in log.c when building with
26321 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
26322 0.1.0.6-rc which introduced --disable-threads.
26323 - Allow manual 'authenticate' commands to the controller interface
26324 from netcat (nc) as well as telnet. We were rejecting them because
26325 they didn't come with the expected whitespace at the end of the
26326 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
26327 - Fix some (not actually triggerable) buffer size checks in usage of
26328 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
26330 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
26331 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
26332 - When configuring, starting, or stopping an NT service, stop
26333 immediately after the service configuration attempt has succeeded
26334 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
26335 - When sending a NETINFO cell, include the original address
26336 received for the other side, not its canonical address. Found
26337 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
26338 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
26339 can pick them up when the tests aren't disabled. Bugfix on
26340 0.2.2.4-alpha which introduced tinytest.
26341 - Fix a memory leak when we check whether a hidden service
26342 descriptor has any usable introduction points left. Fixes bug
26343 4424. Bugfix on 0.2.2.25-alpha.
26344 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
26345 occurred when a client tried to fetch a descriptor for a bridge
26346 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
26348 o Minor bugfixes (on 0.2.3.x):
26349 - Make util unit tests build correctly with MSVC. Bugfix on
26350 0.2.3.3-alpha. Patch by Gisle Vanem.
26351 - Successfully detect AUTH_CHALLENGE cells with no recognized
26352 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
26353 Found by frosty_un.
26354 - If a relay receives an AUTH_CHALLENGE cell it can't answer,
26355 it should still send a NETINFO cell to allow the connection to
26356 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
26358 - Log less loudly when we get an invalid authentication certificate
26359 from a source other than a directory authority: it's not unusual
26360 to see invalid certs because of clock skew. Fixes bug 4370; bugfix
26362 - Tolerate servers with more clock skew in their authentication
26363 certificates than previously. Fixes bug 4371; bugfix on
26365 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
26366 on 0.2.3.4-alpha and 0.2.3.6-alpha.
26369 - Add two new config options for directory authorities:
26370 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
26371 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
26372 that is always sufficient to satisfy the bandwidth requirement for
26373 the Guard flag. Now it will be easier for researchers to simulate
26374 Tor networks with different values. Resolves ticket 4484.
26375 - When Tor ignores a hidden service specified in its configuration,
26376 include the hidden service's directory in the warning message.
26377 Previously, we would only tell the user that some hidden service
26378 was ignored. Bugfix on 0.0.6; fixes bug 4426.
26379 - When we fail to initialize Libevent, retry with IOCP disabled so we
26380 don't need to turn on multi-threading support in Libevent, which in
26381 turn requires a working socketpair(). This is a workaround for bug
26382 4457, which affects Libevent versions from 2.0.1-alpha through
26384 - Detect when we try to build on a platform that doesn't define
26385 AF_UNSPEC to 0. We don't work there, so refuse to compile.
26386 - Update to the November 1 2011 Maxmind GeoLite Country database.
26388 o Packaging changes:
26389 - Make it easier to automate expert package builds on Windows,
26390 by removing an absolute path from makensis.exe command.
26392 o Code simplifications and refactoring:
26393 - Remove some redundant #include directives throughout the code.
26394 Patch from Andrea Gelmini.
26395 - Unconditionally use OpenSSL's AES implementation instead of our
26396 old built-in one. OpenSSL's AES has been better for a while, and
26397 relatively few servers should still be on any version of OpenSSL
26398 that doesn't have good optimized assembly AES.
26399 - Use the name "CERTS" consistently to refer to the new cell type;
26400 we were calling it CERT in some places and CERTS in others.
26403 - Numerous new unit tests for functions in util.c and address.c by
26405 - The long-disabled benchmark tests are now split into their own
26406 ./src/test/bench binary.
26407 - The benchmark tests can now use more accurate timers than
26408 gettimeofday() when such timers are available.
26411 Changes in version 0.2.3.7-alpha - 2011-10-30
26412 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
26413 the new v3 handshake. It also resolves yet another bridge address
26417 - If we mark an OR connection for close based on a cell we process,
26418 don't process any further cells on it. We already avoid further
26419 reads on marked-for-close connections, but now we also discard the
26420 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
26421 which was the first version where we might mark a connection for
26422 close based on processing a cell on it.
26423 - Fix a double-free bug that would occur when we received an invalid
26424 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
26425 bugfix on 0.2.3.6-alpha.
26426 - Bridges no longer include their address in NETINFO cells on outgoing
26427 OR connections, to allow them to blend in better with clients.
26428 Removes another avenue for enumerating bridges. Reported by
26429 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
26430 cells were introduced.
26433 - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
26434 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
26437 Changes in version 0.2.3.6-alpha - 2011-10-26
26438 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
26439 anonymity vulnerability where an attacker can deanonymize Tor
26440 users. Everybody should upgrade.
26442 This release also features support for a new v3 connection handshake
26443 protocol, and fixes to make hidden service connections more robust.
26446 - Implement a new handshake protocol (v3) for authenticating Tors to
26447 each other over TLS. It should be more resistant to fingerprinting
26448 than previous protocols, and should require less TLS hacking for
26449 future Tor implementations. Implements proposal 176.
26450 - Allow variable-length padding cells to disguise the length of
26451 Tor's TLS records. Implements part of proposal 184.
26453 o Privacy/anonymity fixes (clients):
26454 - Clients and bridges no longer send TLS certificate chains on
26455 outgoing OR connections. Previously, each client or bridge would
26456 use the same cert chain for all outgoing OR connections until
26457 its IP address changes, which allowed any relay that the client
26458 or bridge contacted to determine which entry guards it is using.
26459 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
26460 - If a relay receives a CREATE_FAST cell on a TLS connection, it
26461 no longer considers that connection as suitable for satisfying a
26462 circuit EXTEND request. Now relays can protect clients from the
26463 CVE-2011-2768 issue even if the clients haven't upgraded yet.
26464 - Directory authorities no longer assign the Guard flag to relays
26465 that haven't upgraded to the above "refuse EXTEND requests
26466 to client connections" fix. Now directory authorities can
26467 protect clients from the CVE-2011-2768 issue even if neither
26468 the clients nor the relays have upgraded yet. There's a new
26469 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
26470 to let us transition smoothly, else tomorrow there would be no
26473 o Major bugfixes (hidden services):
26474 - Improve hidden service robustness: when an attempt to connect to
26475 a hidden service ends, be willing to refetch its hidden service
26476 descriptors from each of the HSDir relays responsible for them
26477 immediately. Previously, we would not consider refetching the
26478 service's descriptors from each HSDir for 15 minutes after the last
26479 fetch, which was inconvenient if the hidden service was not running
26480 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
26481 - When one of a hidden service's introduction points appears to be
26482 unreachable, stop trying it. Previously, we would keep trying
26483 to build circuits to the introduction point until we lost the
26484 descriptor, usually because the user gave up and restarted Tor.
26485 Partly fixes bug 3825.
26486 - Don't launch a useless circuit after failing to use one of a
26487 hidden service's introduction points. Previously, we would
26488 launch a new introduction circuit, but not set the hidden service
26489 which that circuit was intended to connect to, so it would never
26490 actually be used. A different piece of code would then create a
26491 new introduction circuit correctly. Bug reported by katmagic and
26492 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
26494 o Major bugfixes (other):
26495 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
26496 that they initiated. Relays could distinguish incoming bridge
26497 connections from client connections, creating another avenue for
26498 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
26499 Found by "frosty_un".
26500 - Don't update the AccountingSoftLimitHitAt state file entry whenever
26501 tor gets started. This prevents a wrong average bandwidth
26502 estimate, which would cause relays to always start a new accounting
26503 interval at the earliest possible moment. Fixes bug 2003; bugfix
26504 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
26505 immensely in tracking this bug down.
26506 - Fix a crash bug when changing node restrictions while a DNS lookup
26507 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
26510 o Minor bugfixes (on 0.2.2.x and earlier):
26511 - When a hidden service turns an extra service-side introduction
26512 circuit into a general-purpose circuit, free the rend_data and
26513 intro_key fields first, so we won't leak memory if the circuit
26514 is cannibalized for use as another service-side introduction
26515 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
26516 - Rephrase the log message emitted if the TestSocks check is
26517 successful. Patch from Fabian Keil; fixes bug 4094.
26518 - Bridges now skip DNS self-tests, to act a little more stealthily.
26519 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
26520 bridges. Patch by "warms0x".
26521 - Remove a confusing dollar sign from the example fingerprint in the
26522 man page, and also make the example fingerprint a valid one. Fixes
26523 bug 4309; bugfix on 0.2.1.3-alpha.
26524 - Fix internal bug-checking logic that was supposed to catch
26525 failures in digest generation so that it will fail more robustly
26526 if we ask for a nonexistent algorithm. Found by Coverity Scan.
26527 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
26528 - Report any failure in init_keys() calls launched because our
26529 IP address has changed. Spotted by Coverity Scan. Bugfix on
26530 0.1.1.4-alpha; fixes CID 484.
26532 o Minor bugfixes (on 0.2.3.x):
26533 - Fix a bug in configure.in that kept it from building a configure
26534 script with autoconf versions earlier than 2.61. Fixes bug 2430;
26535 bugfix on 0.2.3.1-alpha.
26536 - Don't warn users that they are exposing a client port to the
26537 Internet if they have specified an RFC1918 address. Previously,
26538 we would warn if the user had specified any non-loopback
26539 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
26540 - Fix memory leaks in the failing cases of the new SocksPort and
26541 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
26542 fixes coverity CIDs 485, 486, and 487.
26545 - When a hidden service's introduction point times out, consider
26546 trying it again during the next attempt to connect to the
26547 HS. Previously, we would not try it again unless a newly fetched
26548 descriptor contained it. Required by fixes for bugs 1297 and 3825.
26549 - The next version of Windows will be called Windows 8, and it has
26550 a major version of 6, minor version of 2. Correctly identify that
26551 version instead of calling it "Very recent version". Resolves
26552 ticket 4153; reported by funkstar.
26553 - The Bridge Authority now writes statistics on how many bridge
26554 descriptors it gave out in total, and how many unique descriptors
26555 it gave out. It also lists how often the most and least commonly
26556 fetched descriptors were given out, as well as the median and
26557 25th/75th percentile. Implements tickets 4200 and 4294.
26558 - Update to the October 4 2011 Maxmind GeoLite Country database.
26560 o Code simplifications and refactoring:
26561 - Remove some old code to remember statistics about which descriptors
26562 we've served as a directory mirror. The feature wasn't used and
26563 is outdated now that microdescriptors are around.
26564 - Rename Tor functions that turn strings into addresses, so that
26565 "parse" indicates that no hostname resolution occurs, and
26566 "lookup" indicates that hostname resolution may occur. This
26567 should help prevent mistakes in the future. Fixes bug 3512.
26570 Changes in version 0.2.2.34 - 2011-10-26
26571 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
26572 can deanonymize Tor users. Everybody should upgrade.
26574 The attack relies on four components: 1) Clients reuse their TLS cert
26575 when talking to different relays, so relays can recognize a user by
26576 the identity key in her cert. 2) An attacker who knows the client's
26577 identity key can probe each guard relay to see if that identity key
26578 is connected to that guard relay right now. 3) A variety of active
26579 attacks in the literature (starting from "Low-Cost Traffic Analysis
26580 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
26581 discover the guard relays that a Tor user visiting the website is using.
26582 4) Clients typically pick three guards at random, so the set of guards
26583 for a given user could well be a unique fingerprint for her. This
26584 release fixes components #1 and #2, which is enough to block the attack;
26585 the other two remain as open research problems. Special thanks to
26586 "frosty_un" for reporting the issue to us!
26588 Clients should upgrade so they are no longer recognizable by the TLS
26589 certs they present. Relays should upgrade so they no longer allow a
26590 remote attacker to probe them to test whether unpatched clients are
26591 currently connected to them.
26593 This release also fixes several vulnerabilities that allow an attacker
26594 to enumerate bridge relays. Some bridge enumeration attacks still
26595 remain; see for example proposal 188.
26597 o Privacy/anonymity fixes (clients):
26598 - Clients and bridges no longer send TLS certificate chains on
26599 outgoing OR connections. Previously, each client or bridge would
26600 use the same cert chain for all outgoing OR connections until
26601 its IP address changes, which allowed any relay that the client
26602 or bridge contacted to determine which entry guards it is using.
26603 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
26604 - If a relay receives a CREATE_FAST cell on a TLS connection, it
26605 no longer considers that connection as suitable for satisfying a
26606 circuit EXTEND request. Now relays can protect clients from the
26607 CVE-2011-2768 issue even if the clients haven't upgraded yet.
26608 - Directory authorities no longer assign the Guard flag to relays
26609 that haven't upgraded to the above "refuse EXTEND requests
26610 to client connections" fix. Now directory authorities can
26611 protect clients from the CVE-2011-2768 issue even if neither
26612 the clients nor the relays have upgraded yet. There's a new
26613 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
26614 to let us transition smoothly, else tomorrow there would be no
26617 o Privacy/anonymity fixes (bridge enumeration):
26618 - Bridge relays now do their directory fetches inside Tor TLS
26619 connections, like all the other clients do, rather than connecting
26620 directly to the DirPort like public relays do. Removes another
26621 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
26622 - Bridges relays now build circuits for themselves in a more similar
26623 way to how clients build them. Removes another avenue for
26624 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
26625 when bridges were introduced.
26626 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
26627 that they initiated. Relays could distinguish incoming bridge
26628 connections from client connections, creating another avenue for
26629 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
26630 Found by "frosty_un".
26633 - Fix a crash bug when changing node restrictions while a DNS lookup
26634 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
26636 - Don't launch a useless circuit after failing to use one of a
26637 hidden service's introduction points. Previously, we would
26638 launch a new introduction circuit, but not set the hidden service
26639 which that circuit was intended to connect to, so it would never
26640 actually be used. A different piece of code would then create a
26641 new introduction circuit correctly. Bug reported by katmagic and
26642 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
26645 - Change an integer overflow check in the OpenBSD_Malloc code so
26646 that GCC is less likely to eliminate it as impossible. Patch
26647 from Mansour Moufid. Fixes bug 4059.
26648 - When a hidden service turns an extra service-side introduction
26649 circuit into a general-purpose circuit, free the rend_data and
26650 intro_key fields first, so we won't leak memory if the circuit
26651 is cannibalized for use as another service-side introduction
26652 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
26653 - Bridges now skip DNS self-tests, to act a little more stealthily.
26654 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
26655 bridges. Patch by "warms0x".
26656 - Fix internal bug-checking logic that was supposed to catch
26657 failures in digest generation so that it will fail more robustly
26658 if we ask for a nonexistent algorithm. Found by Coverity Scan.
26659 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
26660 - Report any failure in init_keys() calls launched because our
26661 IP address has changed. Spotted by Coverity Scan. Bugfix on
26662 0.1.1.4-alpha; fixes CID 484.
26664 o Minor bugfixes (log messages and documentation):
26665 - Remove a confusing dollar sign from the example fingerprint in the
26666 man page, and also make the example fingerprint a valid one. Fixes
26667 bug 4309; bugfix on 0.2.1.3-alpha.
26668 - The next version of Windows will be called Windows 8, and it has
26669 a major version of 6, minor version of 2. Correctly identify that
26670 version instead of calling it "Very recent version". Resolves
26671 ticket 4153; reported by funkstar.
26672 - Downgrade log messages about circuit timeout calibration from
26673 "notice" to "info": they don't require or suggest any human
26674 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
26675 bugfix on 0.2.2.14-alpha.
26678 - Turn on directory request statistics by default and include them in
26679 extra-info descriptors. Don't break if we have no GeoIP database.
26680 Backported from 0.2.3.1-alpha; implements ticket 3951.
26681 - Update to the October 4 2011 Maxmind GeoLite Country database.
26684 Changes in version 0.2.1.31 - 2011-10-26
26685 Tor 0.2.1.31 backports important security and privacy fixes for
26686 oldstable. This release is intended only for package maintainers and
26687 others who cannot use the 0.2.2 stable series. All others should be
26688 using Tor 0.2.2.x or newer.
26690 o Security fixes (also included in 0.2.2.x):
26691 - Replace all potentially sensitive memory comparison operations
26692 with versions whose runtime does not depend on the data being
26693 compared. This will help resist a class of attacks where an
26694 adversary can use variations in timing information to learn
26695 sensitive data. Fix for one case of bug 3122. (Safe memcmp
26696 implementation by Robert Ransom based partially on code by DJB.)
26697 - Fix an assert in parsing router descriptors containing IPv6
26698 addresses. This one took down the directory authorities when
26699 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
26701 o Privacy/anonymity fixes (also included in 0.2.2.x):
26702 - Clients and bridges no longer send TLS certificate chains on
26703 outgoing OR connections. Previously, each client or bridge would
26704 use the same cert chain for all outgoing OR connections until
26705 its IP address changes, which allowed any relay that the client
26706 or bridge contacted to determine which entry guards it is using.
26707 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
26708 - If a relay receives a CREATE_FAST cell on a TLS connection, it
26709 no longer considers that connection as suitable for satisfying a
26710 circuit EXTEND request. Now relays can protect clients from the
26711 CVE-2011-2768 issue even if the clients haven't upgraded yet.
26712 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
26713 that they initiated. Relays could distinguish incoming bridge
26714 connections from client connections, creating another avenue for
26715 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
26716 Found by "frosty_un".
26717 - When receiving a hidden service descriptor, check that it is for
26718 the hidden service we wanted. Previously, Tor would store any
26719 hidden service descriptors that a directory gave it, whether it
26720 wanted them or not. This wouldn't have let an attacker impersonate
26721 a hidden service, but it did let directories pre-seed a client
26722 with descriptors that it didn't want. Bugfix on 0.0.6.
26723 - Avoid linkability based on cached hidden service descriptors: forget
26724 all hidden service descriptors cached as a client when processing a
26725 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
26726 - Make the bridge directory authority refuse to answer directory
26727 requests for "all" descriptors. It used to include bridge
26728 descriptors in its answer, which was a major information leak.
26729 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
26730 - Don't attach new streams to old rendezvous circuits after SIGNAL
26731 NEWNYM. Previously, we would keep using an existing rendezvous
26732 circuit if it remained open (i.e. if it were kept open by a
26733 long-lived stream, or if a new stream were attached to it before
26734 Tor could notice that it was old and no longer in use). Bugfix on
26735 0.1.1.15-rc; fixes bug 3375.
26737 o Minor bugfixes (also included in 0.2.2.x):
26738 - When we restart our relay, we might get a successful connection
26739 from the outside before we've started our reachability tests,
26740 triggering a warning: "ORPort found reachable, but I have no
26741 routerinfo yet. Failing to inform controller of success." This
26742 bug was harmless unless Tor is running under a controller
26743 like Vidalia, in which case the controller would never get a
26744 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
26746 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
26747 enabled. Fixes bug 1526.
26748 - Remove undocumented option "-F" from tor-resolve: it hasn't done
26749 anything since 0.2.1.16-rc.
26750 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
26751 None of the cases where we did this before were wrong, but by making
26752 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
26753 - Fix a rare crash bug that could occur when a client was configured
26754 with a large number of bridges. Fixes bug 2629; bugfix on
26755 0.2.1.2-alpha. Bugfix by trac user "shitlei".
26756 - Correct the warning displayed when a rendezvous descriptor exceeds
26757 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
26759 - Fix an uncommon assertion failure when running with DNSPort under
26760 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
26761 - When warning about missing zlib development packages during compile,
26762 give the correct package names. Bugfix on 0.2.0.1-alpha.
26763 - Require that introduction point keys and onion keys have public
26764 exponent 65537. Bugfix on 0.2.0.10-alpha.
26765 - Do not crash when our configuration file becomes unreadable, for
26766 example due to a permissions change, between when we start up
26767 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
26769 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
26771 - Always NUL-terminate the sun_path field of a sockaddr_un before
26772 passing it to the kernel. (Not a security issue: kernels are
26773 smart enough to reject bad sockaddr_uns.) Found by Coverity;
26774 CID #428. Bugfix on Tor 0.2.0.3-alpha.
26775 - Don't stack-allocate the list of supplementary GIDs when we're
26776 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
26777 could take up to 256K, which is way too much stack. Found by
26778 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
26780 o Minor bugfixes (only in 0.2.1.x):
26781 - Resume using micro-version numbers in 0.2.1.x: our Debian packages
26782 rely on them. Bugfix on 0.2.1.30.
26783 - Use git revisions instead of svn revisions when generating our
26784 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
26786 o Minor features (also included in 0.2.2.x):
26787 - Adjust the expiration time on our SSL session certificates to
26788 better match SSL certs seen in the wild. Resolves ticket 4014.
26789 - Allow nameservers with IPv6 address. Resolves bug 2574.
26790 - Update to the October 4 2011 Maxmind GeoLite Country database.
26793 Changes in version 0.2.3.5-alpha - 2011-09-28
26794 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
26795 bridge relays; fixes an assertion error that many users started hitting
26796 today; and adds the ability to refill token buckets more often than
26797 once per second, allowing significant performance improvements.
26800 - Bridge relays now do their directory fetches inside Tor TLS
26801 connections, like all the other clients do, rather than connecting
26802 directly to the DirPort like public relays do. Removes another
26803 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
26804 - Bridges relays now build circuits for themselves in a more similar
26805 way to how clients build them. Removes another avenue for
26806 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
26807 when bridges were introduced.
26810 - Fix an "Assertion md->held_by_node == 1 failed" error that could
26811 occur when the same microdescriptor was referenced by two node_t
26812 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
26814 o Major features (networking):
26815 - Add a new TokenBucketRefillInterval option to refill token buckets
26816 more frequently than once per second. This should improve network
26817 performance, alleviate queueing problems, and make traffic less
26818 bursty. Implements proposal 183; closes ticket 3630. Design by
26819 Florian Tschorsch and Björn Scheuermann; implementation by
26823 - Change an integer overflow check in the OpenBSD_Malloc code so
26824 that GCC is less likely to eliminate it as impossible. Patch
26825 from Mansour Moufid. Fixes bug 4059.
26827 o Minor bugfixes (usability):
26828 - Downgrade log messages about circuit timeout calibration from
26829 "notice" to "info": they don't require or suggest any human
26830 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
26831 bugfix on 0.2.2.14-alpha.
26833 o Minor features (diagnostics):
26834 - When the system call to create a listener socket fails, log the
26835 error message explaining why. This may help diagnose bug 4027.
26838 Changes in version 0.2.3.4-alpha - 2011-09-13
26839 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
26840 tweak to Tor's TLS handshake that makes relays and bridges that run
26841 this new version reachable from Iran again. It also fixes a few new
26842 bugs in 0.2.3.x, and teaches relays to recognize when they're not
26843 listed in the network consensus and republish.
26845 o Major bugfixes (also part of 0.2.2.33):
26846 - Avoid an assertion failure when reloading a configuration with
26847 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
26848 3923; bugfix on 0.2.2.25-alpha.
26850 o Minor features (security, also part of 0.2.2.33):
26851 - Check for replays of the public-key encrypted portion of an
26852 INTRODUCE1 cell, in addition to the current check for replays of
26853 the g^x value. This prevents a possible class of active attacks
26854 by an attacker who controls both an introduction point and a
26855 rendezvous point, and who uses the malleability of AES-CTR to
26856 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
26857 that these attacks are infeasible (requiring the attacker to send
26858 on the order of zettabytes of altered cells in a short interval),
26859 but we'd rather block them off in case there are any classes of
26860 this attack that we missed. Reported by Willem Pinckaers.
26862 o Minor features (also part of 0.2.2.33):
26863 - Adjust the expiration time on our SSL session certificates to
26864 better match SSL certs seen in the wild. Resolves ticket 4014.
26865 - Change the default required uptime for a relay to be accepted as
26866 a HSDir (hidden service directory) from 24 hours to 25 hours.
26867 Improves on 0.2.0.10-alpha; resolves ticket 2649.
26868 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
26869 authorities to abstain from voting on assignment of the HSDir
26870 consensus flag. Related to bug 2649.
26871 - Update to the September 6 2011 Maxmind GeoLite Country database.
26873 o Minor bugfixes (also part of 0.2.2.33):
26874 - Demote the 'replay detected' log message emitted when a hidden
26875 service receives the same Diffie-Hellman public key in two different
26876 INTRODUCE2 cells to info level. A normal Tor client can cause that
26877 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
26878 fixes part of bug 2442.
26879 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
26880 level. There is nothing that a hidden service's operator can do
26881 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
26883 - Clarify a log message specifying the characters permitted in
26884 HiddenServiceAuthorizeClient client names. Previously, the log
26885 message said that "[A-Za-z0-9+-_]" were permitted; that could have
26886 given the impression that every ASCII character between "+" and "_"
26887 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
26889 o Build fixes (also part of 0.2.2.33):
26890 - Clean up some code issues that prevented Tor from building on older
26891 BSDs. Fixes bug 3894; reported by "grarpamp".
26892 - Search for a platform-specific version of "ar" when cross-compiling.
26893 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
26896 - Fix a bug where the SocksPort option (for example) would get
26897 ignored and replaced by the default if a SocksListenAddress
26898 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
26902 - Relays now try regenerating and uploading their descriptor more
26903 frequently if they are not listed in the consensus, or if the
26904 version of their descriptor listed in the consensus is too
26905 old. This fix should prevent situations where a server declines
26906 to re-publish itself because it has done so too recently, even
26907 though the authorities decided not to list its recent-enough
26908 descriptor. Fix for bug 3327.
26911 - Relays now include a reason for regenerating their descriptors
26912 in an HTTP header when uploading to the authorities. This will
26913 make it easier to debug descriptor-upload issues in the future.
26914 - When starting as root and then changing our UID via the User
26915 control option, and we have a ControlSocket configured, make sure
26916 that the ControlSocket is owned by the same account that Tor will
26917 run under. Implements ticket 3421; fix by Jérémy Bobbio.
26920 - Abort if tor_vasprintf fails in connection_printf_to_buf (a
26921 utility function used in the control-port code). This shouldn't
26922 ever happen unless Tor is completely out of memory, but if it did
26923 happen and Tor somehow recovered from it, Tor could have sent a log
26924 message to a control port in the middle of a reply to a controller
26925 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
26926 - Make 'FetchUselessDescriptors' cause all descriptor types and
26927 all consensus types (including microdescriptors) to get fetched.
26928 Fixes bug 3851; bugfix on 0.2.3.1-alpha.
26930 o Code refactoring:
26931 - Make a new "entry connection" struct as an internal subtype of "edge
26932 connection", to simplify the code and make exit connections smaller.
26935 Changes in version 0.2.2.33 - 2011-09-13
26936 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
26937 TLS handshake that makes relays and bridges that run this new version
26938 reachable from Iran again.
26941 - Avoid an assertion failure when reloading a configuration with
26942 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
26943 3923; bugfix on 0.2.2.25-alpha.
26945 o Minor features (security):
26946 - Check for replays of the public-key encrypted portion of an
26947 INTRODUCE1 cell, in addition to the current check for replays of
26948 the g^x value. This prevents a possible class of active attacks
26949 by an attacker who controls both an introduction point and a
26950 rendezvous point, and who uses the malleability of AES-CTR to
26951 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
26952 that these attacks are infeasible (requiring the attacker to send
26953 on the order of zettabytes of altered cells in a short interval),
26954 but we'd rather block them off in case there are any classes of
26955 this attack that we missed. Reported by Willem Pinckaers.
26958 - Adjust the expiration time on our SSL session certificates to
26959 better match SSL certs seen in the wild. Resolves ticket 4014.
26960 - Change the default required uptime for a relay to be accepted as
26961 a HSDir (hidden service directory) from 24 hours to 25 hours.
26962 Improves on 0.2.0.10-alpha; resolves ticket 2649.
26963 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
26964 authorities to abstain from voting on assignment of the HSDir
26965 consensus flag. Related to bug 2649.
26966 - Update to the September 6 2011 Maxmind GeoLite Country database.
26968 o Minor bugfixes (documentation and log messages):
26969 - Correct the man page to explain that HashedControlPassword and
26970 CookieAuthentication can both be set, in which case either method
26971 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
26972 when we decided to allow these config options to both be set. Issue
26973 raised by bug 3898.
26974 - Demote the 'replay detected' log message emitted when a hidden
26975 service receives the same Diffie-Hellman public key in two different
26976 INTRODUCE2 cells to info level. A normal Tor client can cause that
26977 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
26978 fixes part of bug 2442.
26979 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
26980 level. There is nothing that a hidden service's operator can do
26981 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
26983 - Clarify a log message specifying the characters permitted in
26984 HiddenServiceAuthorizeClient client names. Previously, the log
26985 message said that "[A-Za-z0-9+-_]" were permitted; that could have
26986 given the impression that every ASCII character between "+" and "_"
26987 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
26990 - Provide a substitute implementation of lround() for MSVC, which
26991 apparently lacks it. Patch from Gisle Vanem.
26992 - Clean up some code issues that prevented Tor from building on older
26993 BSDs. Fixes bug 3894; reported by "grarpamp".
26994 - Search for a platform-specific version of "ar" when cross-compiling.
26995 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
26998 Changes in version 0.2.3.3-alpha - 2011-09-01
26999 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
27000 security, and provides client-side support for the microdescriptor
27001 and optimistic data features introduced earlier in the 0.2.3.x
27002 series. It also includes numerous critical bugfixes in the (optional)
27003 bufferevent-based networking backend.
27005 o Major features (stream isolation):
27006 - You can now configure Tor so that streams from different
27007 applications are isolated on different circuits, to prevent an
27008 attacker who sees your streams as they leave an exit node from
27009 linking your sessions to one another. To do this, choose some way
27010 to distinguish the applications: have them connect to different
27011 SocksPorts, or have one of them use SOCKS4 while the other uses
27012 SOCKS5, or have them pass different authentication strings to the
27013 SOCKS proxy. Then, use the new SocksPort syntax to configure the
27014 degree of isolation you need. This implements Proposal 171.
27015 - There's a new syntax for specifying multiple client ports (such as
27016 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
27017 multiple *Port entries with full addr:port syntax on each.
27018 The old *ListenAddress format is still supported, but you can't
27019 mix it with the new *Port syntax.
27021 o Major features (other):
27022 - Enable microdescriptor fetching by default for clients. This allows
27023 clients to download a much smaller amount of directory information.
27024 To disable it (and go back to the old-style consensus and
27025 descriptors), set "UseMicrodescriptors 0" in your torrc file.
27026 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
27027 "PortForwarding" config option), now supports Windows.
27028 - When using an exit relay running 0.2.3.x, clients can now
27029 "optimistically" send data before the exit relay reports that
27030 the stream has opened. This saves a round trip when starting
27031 connections where the client speaks first (such as web browsing).
27032 This behavior is controlled by a consensus parameter (currently
27033 disabled). To turn it on or off manually, use the "OptimisticData"
27034 torrc option. Implements proposal 181; code by Ian Goldberg.
27036 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
27037 - When using IOCP on Windows, we need to enable Libevent windows
27039 - The IOCP backend now works even when the user has not specified
27040 the (internal, debugging-only) _UseFilteringSSLBufferevents option.
27041 Fixes part of bug 3752.
27042 - Correctly record the bytes we've read and written when using
27043 bufferevents, so that we can include them in our bandwidth history
27044 and advertised bandwidth. Fixes bug 3803.
27045 - Apply rate-limiting only at the bottom of a chain of filtering
27046 bufferevents. This prevents us from filling up internal read
27047 buffers and violating rate-limits when filtering bufferevents
27048 are enabled. Fixes part of bug 3804.
27049 - Add high-watermarks to the output buffers for filtered
27050 bufferevents. This prevents us from filling up internal write
27051 buffers and wasting CPU cycles when filtering bufferevents are
27052 enabled. Fixes part of bug 3804.
27053 - Correctly notice when data has been written from a bufferevent
27054 without flushing it completely. Fixes bug 3805.
27055 - Fix a bug where server-side tunneled bufferevent-based directory
27056 streams would get closed prematurely. Fixes bug 3814.
27057 - Fix a use-after-free error with per-connection rate-limiting
27058 buckets. Fixes bug 3888.
27060 o Major bugfixes (also part of 0.2.2.31-rc):
27061 - If we're configured to write our ControlPorts to disk, only write
27062 them after switching UID and creating the data directory. This way,
27063 we don't fail when starting up with a nonexistent DataDirectory
27064 and a ControlPortWriteToFile setting based on that directory. Fixes
27065 bug 3747; bugfix on Tor 0.2.2.26-beta.
27068 - Added a new CONF_CHANGED event so that controllers can be notified
27069 of any configuration changes made by other controllers, or by the
27070 user. Implements ticket 1692.
27071 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
27072 leak when using bufferevents, and lets Libevent worry about how to
27073 best copy data out of a buffer.
27074 - Replace files in stats/ rather than appending to them. Now that we
27075 include statistics in extra-info descriptors, it makes no sense to
27076 keep old statistics forever. Implements ticket 2930.
27078 o Minor features (build compatibility):
27079 - Limited, experimental support for building with nmake and MSVC.
27080 - Provide a substitute implementation of lround() for MSVC, which
27081 apparently lacks it. Patch from Gisle Vanem.
27083 o Minor features (also part of 0.2.2.31-rc):
27084 - Update to the August 2 2011 Maxmind GeoLite Country database.
27086 o Minor bugfixes (on 0.2.3.x-alpha):
27087 - Fix a spurious warning when parsing SOCKS requests with
27088 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
27089 - Get rid of a harmless warning that could happen on relays running
27090 with bufferevents. The warning was caused by someone doing an http
27091 request to a relay's orport. Also don't warn for a few related
27092 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
27094 o Minor bugfixes (on 2.2.x and earlier):
27095 - Correct the man page to explain that HashedControlPassword and
27096 CookieAuthentication can both be set, in which case either method
27097 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
27098 when we decided to allow these config options to both be set. Issue
27099 raised by bug 3898.
27100 - The "--quiet" and "--hush" options now apply not only to Tor's
27101 behavior before logs are configured, but also to Tor's behavior in
27102 the absence of configured logs. Fixes bug 3550; bugfix on
27105 o Minor bugfixes (also part of 0.2.2.31-rc):
27106 - Write several files in text mode, on OSes that distinguish text
27107 mode from binary mode (namely, Windows). These files are:
27108 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
27109 that collect those statistics; 'client_keys' and 'hostname' for
27110 hidden services that use authentication; and (in the tor-gencert
27111 utility) newly generated identity and signing keys. Previously,
27112 we wouldn't specify text mode or binary mode, leading to an
27113 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
27114 the DirRecordUsageByCountry option which would have triggered
27115 the assertion failure was added), although this assertion failure
27116 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
27117 - Selectively disable deprecation warnings on OS X because Lion
27118 started deprecating the shipped copy of openssl. Fixes bug 3643.
27119 - Remove an extra pair of quotation marks around the error
27120 message in control-port STATUS_GENERAL BUG events. Bugfix on
27121 0.1.2.6-alpha; fixes bug 3732.
27122 - When unable to format an address as a string, report its value
27123 as "???" rather than reusing the last formatted address. Bugfix
27126 o Code simplifications and refactoring:
27127 - Rewrite the listener-selection logic so that parsing which ports
27128 we want to listen on is now separate from binding to the ports
27132 - Building Tor with bufferevent support now requires Libevent
27133 2.0.13-stable or later. Previous versions of Libevent had bugs in
27134 SSL-related bufferevents and related issues that would make Tor
27135 work badly with bufferevents. Requiring 2.0.13-stable also allows
27136 Tor with bufferevents to take advantage of Libevent APIs
27137 introduced after 2.0.8-rc.
27140 Changes in version 0.2.2.32 - 2011-08-27
27141 The Tor 0.2.2 release series is dedicated to the memory of Andreas
27142 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
27143 a founder of the PETS community, a leader in our field, a mentor,
27144 and a friend. He left us with these words: "I had the possibility
27145 to contribute to this world that is not as it should be. I hope I
27146 could help in some areas to make the world a better place, and that
27147 I could also encourage other people to be engaged in improving the
27148 world. Please, stay engaged. This world needs you, your love, your
27149 initiative -- now I cannot be part of that anymore."
27151 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
27152 ready. More than two years in the making, this release features improved
27153 client performance and hidden service reliability, better compatibility
27154 for Android, correct behavior for bridges that listen on more than
27155 one address, more extensible and flexible directory object handling,
27156 better reporting of network statistics, improved code security, and
27157 many many other features and bugfixes.
27160 Changes in version 0.2.2.31-rc - 2011-08-17
27161 Tor 0.2.2.31-rc is the second and hopefully final release candidate
27162 for the Tor 0.2.2.x series.
27165 - Remove an extra pair of quotation marks around the error
27166 message in control-port STATUS_GENERAL BUG events. Bugfix on
27167 0.1.2.6-alpha; fixes bug 3732.
27168 - If we're configured to write our ControlPorts to disk, only write
27169 them after switching UID and creating the data directory. This way,
27170 we don't fail when starting up with a nonexistent DataDirectory
27171 and a ControlPortWriteToFile setting based on that directory. Fixes
27172 bug 3747; bugfix on Tor 0.2.2.26-beta.
27175 - Update to the August 2 2011 Maxmind GeoLite Country database.
27178 - Allow GETINFO fingerprint to return a fingerprint even when
27179 we have not yet built a router descriptor. Fixes bug 3577;
27180 bugfix on 0.2.0.1-alpha.
27181 - Write several files in text mode, on OSes that distinguish text
27182 mode from binary mode (namely, Windows). These files are:
27183 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
27184 that collect those statistics; 'client_keys' and 'hostname' for
27185 hidden services that use authentication; and (in the tor-gencert
27186 utility) newly generated identity and signing keys. Previously,
27187 we wouldn't specify text mode or binary mode, leading to an
27188 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
27189 the DirRecordUsageByCountry option which would have triggered
27190 the assertion failure was added), although this assertion failure
27191 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
27192 - Selectively disable deprecation warnings on OS X because Lion
27193 started deprecating the shipped copy of openssl. Fixes bug 3643.
27194 - When unable to format an address as a string, report its value
27195 as "???" rather than reusing the last formatted address. Bugfix
27199 Changes in version 0.2.3.2-alpha - 2011-07-18
27200 Tor 0.2.3.2-alpha introduces two new experimental features:
27201 microdescriptors and pluggable transports. It also continues cleaning
27202 up a variety of recently introduced features.
27205 - Clients can now use microdescriptors instead of regular descriptors
27206 to build circuits. Microdescriptors are authority-generated
27207 summaries of regular descriptors' contents, designed to change
27208 very rarely (see proposal 158 for details). This feature is
27209 designed to save bandwidth, especially for clients on slow internet
27210 connections. It's off by default for now, since nearly no caches
27211 support it, but it will be on-by-default for clients in a future
27212 version. You can use the UseMicrodescriptors option to turn it on.
27213 - Tor clients using bridges can now be configured to use a separate
27214 'transport' proxy for each bridge. This approach helps to resist
27215 censorship by allowing bridges to use protocol obfuscation
27216 plugins. It implements part of proposal 180. Implements ticket 2841.
27217 - While we're trying to bootstrap, record how many TLS connections
27218 fail in each state, and report which states saw the most failures
27219 in response to any bootstrap failures. This feature may speed up
27220 diagnosis of censorship events. Implements ticket 3116.
27222 o Major bugfixes (on 0.2.3.1-alpha):
27223 - When configuring a large set of nodes in EntryNodes (as with
27224 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
27225 random subset to be guards, and choose them in random
27226 order. Fixes bug 2798.
27227 - Tor could crash when remembering a consensus in a non-used consensus
27228 flavor without having a current consensus set. Fixes bug 3361.
27229 - Comparing an unknown address to a microdescriptor's shortened exit
27230 policy would always give a "rejected" result. Fixes bug 3599.
27231 - Using microdescriptors as a client no longer prevents Tor from
27232 uploading and downloading hidden service descriptors. Fixes
27236 - Allow nameservers with IPv6 address. Resolves bug 2574.
27237 - Accept attempts to include a password authenticator in the
27238 handshake, as supported by SOCKS5. This handles SOCKS clients that
27239 don't know how to omit a password when authenticating. Resolves
27241 - When configuring a large set of nodes in EntryNodes, and there are
27242 enough of them listed as Guard so that we don't need to consider
27243 the non-guard entries, prefer the ones listed with the Guard flag.
27244 - Check for and recover from inconsistency in the microdescriptor
27245 cache. This will make it harder for us to accidentally free a
27246 microdescriptor without removing it from the appropriate data
27247 structures. Fixes issue 3135; issue noted by "wanoskarnet".
27248 - Log SSL state transitions at log level DEBUG, log domain
27249 HANDSHAKE. This can be useful for debugging censorship events.
27250 Implements ticket 3264.
27251 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
27252 implements ticket 3439.
27254 o Minor bugfixes (on 0.2.3.1-alpha):
27255 - Do not free all general-purpose regular descriptors just
27256 because microdescriptor use is enabled. Fixes bug 3113.
27257 - Correctly link libevent_openssl when --enable-static-libevent
27258 is passed to configure. Fixes bug 3118.
27259 - Bridges should not complain during their heartbeat log messages that
27260 they are unlisted in the consensus: that's more or less the point
27261 of being a bridge. Fixes bug 3183.
27262 - Report a SIGNAL event to controllers when acting on a delayed
27263 SIGNAL NEWNYM command. Previously, we would report a SIGNAL
27264 event to the controller if we acted on a SIGNAL NEWNYM command
27265 immediately, and otherwise not report a SIGNAL event for the
27266 command at all. Fixes bug 3349.
27267 - Fix a crash when handling the SIGNAL controller command or
27268 reporting ERR-level status events with bufferevents enabled. Found
27269 by Robert Ransom. Fixes bug 3367.
27270 - Always ship the tor-fw-helper manpage in our release tarballs.
27271 Fixes bug 3389. Reported by Stephen Walker.
27272 - Fix a class of double-mark-for-close bugs when bufferevents
27273 are enabled. Fixes bug 3403.
27274 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
27275 - Add SIGNAL to the list returned by the 'GETINFO events/names'
27276 control-port command. Fixes part of bug 3465.
27277 - Prevent using negative indices during unit test runs when read_all()
27278 fails. Spotted by coverity.
27279 - Fix a rare memory leak when checking the nodelist without it being
27280 present. Found by coverity.
27281 - Only try to download a microdescriptor-flavored consensus from
27282 a directory cache that provides them.
27284 o Minor bugfixes (on 0.2.2.x and earlier):
27285 - Assert that hidden-service-related operations are not performed
27286 using single-hop circuits. Previously, Tor would assert that
27287 client-side streams are not attached to single-hop circuits,
27288 but not that other sensitive operations on the client and service
27289 side are not performed using single-hop circuits. Fixes bug 3332;
27291 - Don't publish a new relay descriptor when we reload our onion key,
27292 unless the onion key has actually changed. Fixes bug 3263 and
27293 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
27294 - Allow GETINFO fingerprint to return a fingerprint even when
27295 we have not yet built a router descriptor. Fixes bug 3577;
27296 bugfix on 0.2.0.1-alpha.
27297 - Make 'tor --digests' list hashes of all Tor source files. Bugfix
27298 on 0.2.2.4-alpha; fixes bug 3427.
27300 o Code simplification and refactoring:
27301 - Use tor_sscanf() in place of scanf() in more places through the
27302 code. This makes us a little more locale-independent, and
27303 should help shut up code-analysis tools that can't tell
27304 a safe sscanf string from a dangerous one.
27305 - Use tt_assert(), not tor_assert(), for checking for test failures.
27306 This makes the unit tests more able to go on in the event that
27308 - Split connection_about_to_close() into separate functions for each
27312 - On Windows, we now define the _WIN32_WINNT macros only if they
27313 are not already defined. This lets the person building Tor decide,
27314 if they want, to require a later version of Windows.
27317 Changes in version 0.2.2.30-rc - 2011-07-07
27318 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
27319 series. It fixes a few smaller bugs, but generally appears stable.
27320 Please test it and let us know whether it is!
27323 - Send a SUCCEEDED stream event to the controller when a reverse
27324 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
27325 discovered by katmagic.
27326 - Always NUL-terminate the sun_path field of a sockaddr_un before
27327 passing it to the kernel. (Not a security issue: kernels are
27328 smart enough to reject bad sockaddr_uns.) Found by Coverity;
27329 CID #428. Bugfix on Tor 0.2.0.3-alpha.
27330 - Don't stack-allocate the list of supplementary GIDs when we're
27331 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
27332 could take up to 256K, which is way too much stack. Found by
27333 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
27334 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
27335 events/names' control-port command. Bugfix on 0.2.2.9-alpha;
27336 fixes part of bug 3465.
27337 - Fix a memory leak when receiving a descriptor for a hidden
27338 service we didn't ask for. Found by Coverity; CID #30. Bugfix
27342 - Update to the July 1 2011 Maxmind GeoLite Country database.
27345 Changes in version 0.2.2.29-beta - 2011-06-20
27346 Tor 0.2.2.29-beta reverts an accidental behavior change for users who
27347 have bridge lines in their torrc but don't want to use them; gets
27348 us closer to having the control socket feature working on Debian;
27349 and fixes a variety of smaller bugs.
27352 - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
27353 When we changed the default behavior to "use bridges if any
27354 are listed in the torrc", we surprised users who had bridges
27355 in their torrc files but who didn't actually want to use them.
27356 Partial resolution for bug 3354.
27359 - Don't attach new streams to old rendezvous circuits after SIGNAL
27360 NEWNYM. Previously, we would keep using an existing rendezvous
27361 circuit if it remained open (i.e. if it were kept open by a
27362 long-lived stream, or if a new stream were attached to it before
27363 Tor could notice that it was old and no longer in use). Bugfix on
27364 0.1.1.15-rc; fixes bug 3375.
27367 - Fix a bug when using ControlSocketsGroupWritable with User. The
27368 directory's group would be checked against the current group, not
27369 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
27370 bugfix on 0.2.2.26-beta.
27371 - Make connection_printf_to_buf()'s behavior sane. Its callers
27372 expect it to emit a CRLF iff the format string ends with CRLF;
27373 it actually emitted a CRLF iff (a) the format string ended with
27374 CRLF or (b) the resulting string was over 1023 characters long or
27375 (c) the format string did not end with CRLF *and* the resulting
27376 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
27377 fixes part of bug 3407.
27378 - Make send_control_event_impl()'s behavior sane. Its callers
27379 expect it to always emit a CRLF at the end of the string; it
27380 might have emitted extra control characters as well. Bugfix on
27381 0.1.1.9-alpha; fixes another part of bug 3407.
27382 - Make crypto_rand_int() check the value of its input correctly.
27383 Previously, it accepted values up to UINT_MAX, but could return a
27384 negative number if given a value above INT_MAX+1. Found by George
27385 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
27386 - Avoid a segfault when reading a malformed circuit build state
27387 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
27389 - When asked about a DNS record type we don't support via a
27390 client DNSPort, reply with NOTIMPL rather than an empty
27391 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
27392 - Fix a rare memory leak during stats writing. Found by coverity.
27395 - Update to the June 1 2011 Maxmind GeoLite Country database.
27397 o Code simplifications and refactoring:
27398 - Remove some dead code as indicated by coverity.
27399 - Remove a few dead assignments during router parsing. Found by
27401 - Add some forgotten return value checks during unit tests. Found
27403 - Don't use 1-bit wide signed bit fields. Found by coverity.
27406 Changes in version 0.2.2.28-beta - 2011-06-04
27407 Tor 0.2.2.28-beta makes great progress towards a new stable release: we
27408 fixed a big bug in whether relays stay in the consensus consistently,
27409 we moved closer to handling bridges and hidden services correctly,
27410 and we started the process of better handling the dreaded "my Vidalia
27411 died, and now my Tor demands a password when I try to reconnect to it"
27415 - Don't decide to make a new descriptor when receiving a HUP signal.
27416 This bug has caused a lot of 0.2.2.x relays to disappear from the
27417 consensus periodically. Fixes the most common case of triggering
27418 bug 1810; bugfix on 0.2.2.7-alpha.
27419 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
27420 - Don't try to build descriptors if "ORPort auto" is set and we
27421 don't know our actual ORPort yet. Fix for bug 3216; bugfix on
27423 - Resolve a crash that occurred when setting BridgeRelay to 1 with
27424 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
27425 - Apply circuit timeouts to opened hidden-service-related circuits
27426 based on the correct start time. Previously, we would apply the
27427 circuit build timeout based on time since the circuit's creation;
27428 it was supposed to be applied based on time since the circuit
27429 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
27430 - Use the same circuit timeout for client-side introduction
27431 circuits as for other four-hop circuits, rather than the timeout
27432 for single-hop directory-fetch circuits; the shorter timeout may
27433 have been appropriate with the static circuit build timeout in
27434 0.2.1.x and earlier, but caused many hidden service access attempts
27435 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
27436 on 0.2.2.2-alpha; fixes another part of bug 1297.
27437 - In ticket 2511 we fixed a case where you could use an unconfigured
27438 bridge if you had configured it as a bridge the last time you ran
27439 Tor. Now fix another edge case: if you had configured it as a bridge
27440 but then switched to a different bridge via the controller, you
27441 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
27445 - Add an __OwningControllerProcess configuration option and a
27446 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
27447 that when it exits, Tor will shut down. Implements feature 3049.
27448 - If "UseBridges 1" is set and no bridges are configured, Tor will
27449 now refuse to build any circuits until some bridges are set.
27450 If "UseBridges auto" is set, Tor will use bridges if they are
27451 configured and we are not running as a server, but otherwise will
27452 make circuits as usual. The new default is "auto". Patch by anonym,
27453 so the Tails LiveCD can stop automatically revealing you as a Tor
27457 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
27458 - Remove a trailing asterisk from "exit-policy/default" in the
27459 output of the control port command "GETINFO info/names". Bugfix
27461 - Use a wide type to hold sockets when built for 64-bit Windows builds.
27463 - Warn when the user configures two HiddenServiceDir lines that point
27464 to the same directory. Bugfix on 0.0.6 (the version introducing
27465 HiddenServiceDir); fixes bug 3289.
27466 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
27467 part of bug 2748; bugfix on 0.2.0.10-alpha.
27468 - Log malformed requests for rendezvous descriptors as protocol
27469 warnings, not warnings. Also, use a more informative log message
27470 in case someone sees it at log level warning without prior
27471 info-level messages. Fixes the other part of bug 2748; bugfix
27473 - Clear the table recording the time of the last request for each
27474 hidden service descriptor from each HS directory on SIGNAL NEWNYM.
27475 Previously, we would clear our HS descriptor cache on SIGNAL
27476 NEWNYM, but if we had previously retrieved a descriptor (or tried
27477 to) from every directory responsible for it, we would refuse to
27478 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
27480 - Fix a log message that said "bits" while displaying a value in
27481 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
27483 - When checking for 1024-bit keys, check for 1024 bits, not 128
27484 bytes. This allows Tor to correctly discard keys of length 1017
27485 through 1023. Bugfix on 0.0.9pre5.
27488 - Relays now log the reason for publishing a new relay descriptor,
27489 so we have a better chance of hunting down instances of bug 1810.
27490 Resolves ticket 3252.
27491 - Revise most log messages that refer to nodes by nickname to
27492 instead use the "$key=nickname at address" format. This should be
27493 more useful, especially since nicknames are less and less likely
27494 to be unique. Resolves ticket 3045.
27495 - Log (at info level) when purging pieces of hidden-service-client
27496 state because of SIGNAL NEWNYM.
27499 - Remove undocumented option "-F" from tor-resolve: it hasn't done
27500 anything since 0.2.1.16-rc.
27503 Changes in version 0.2.2.27-beta - 2011-05-18
27504 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
27505 release, and also adds a few more general bugfixes.
27508 - Fix a crash bug when changing bridges in a running Tor process.
27509 Fixes bug 3213; bugfix on 0.2.2.26-beta.
27510 - When the controller configures a new bridge, don't wait 10 to 60
27511 seconds before trying to fetch its descriptor. Bugfix on
27512 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
27515 - Require that onion keys have exponent 65537 in microdescriptors too.
27516 Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
27517 - Tor used to limit HttpProxyAuthenticator values to 48 characters.
27518 Changed the limit to 512 characters by removing base64 newlines.
27519 Fixes bug 2752. Fix by Michael Yakubovich.
27520 - When a client starts or stops using bridges, never use a circuit
27521 that was built before the configuration change. This behavior could
27522 put at risk a user who uses bridges to ensure that her traffic
27523 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
27527 Changes in version 0.2.2.26-beta - 2011-05-17
27528 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
27529 also introduces a new "socksport auto" approach that should make it
27530 easier to run multiple Tors on the same system, and does a lot of
27531 cleanup to get us closer to a release candidate.
27533 o Security/privacy fixes:
27534 - Replace all potentially sensitive memory comparison operations
27535 with versions whose runtime does not depend on the data being
27536 compared. This will help resist a class of attacks where an
27537 adversary can use variations in timing information to learn
27538 sensitive data. Fix for one case of bug 3122. (Safe memcmp
27539 implementation by Robert Ransom based partially on code by DJB.)
27540 - When receiving a hidden service descriptor, check that it is for
27541 the hidden service we wanted. Previously, Tor would store any
27542 hidden service descriptors that a directory gave it, whether it
27543 wanted them or not. This wouldn't have let an attacker impersonate
27544 a hidden service, but it did let directories pre-seed a client
27545 with descriptors that it didn't want. Bugfix on 0.0.6.
27546 - On SIGHUP, do not clear out all TrackHostExits mappings, client
27547 DNS cache entries, and virtual address mappings: that's what
27548 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
27551 - The options SocksPort, ControlPort, and so on now all accept a
27552 value "auto" that opens a socket on an OS-selected port. A
27553 new ControlPortWriteToFile option tells Tor to write its
27554 actual control port or ports to a chosen file. If the option
27555 ControlPortFileGroupReadable is set, the file is created as
27556 group-readable. Now users can run two Tor clients on the same
27557 system without needing to manually mess with parameters. Resolves
27558 part of ticket 3076.
27559 - Set SO_REUSEADDR on all sockets, not just listeners. This should
27560 help busy exit nodes avoid running out of useable ports just
27561 because all the ports have been used in the near past. Resolves
27565 - New "GETINFO net/listeners/(type)" controller command to return
27566 a list of addresses and ports that are bound for listeners for a
27567 given connection type. This is useful when the user has configured
27568 "SocksPort auto" and the controller needs to know which port got
27569 chosen. Resolves another part of ticket 3076.
27570 - Add a new ControlSocketsGroupWritable configuration option: when
27571 it is turned on, ControlSockets are group-writeable by the default
27572 group of the current user. Patch by Jérémy Bobbio; implements
27574 - Tor now refuses to create a ControlSocket in a directory that is
27575 world-readable (or group-readable if ControlSocketsGroupWritable
27576 is 0). This is necessary because some operating systems do not
27577 enforce permissions on an AF_UNIX sockets. Permissions on the
27578 directory holding the socket, however, seems to work everywhere.
27579 - Rate-limit a warning about failures to download v2 networkstatus
27580 documents. Resolves part of bug 1352.
27581 - Backport code from 0.2.3.x that allows directory authorities to
27582 clean their microdescriptor caches. Needed to resolve bug 2230.
27583 - When an HTTPS proxy reports "403 Forbidden", we now explain
27584 what it means rather than calling it an unexpected status code.
27585 Closes bug 2503. Patch from Michael Yakubovich.
27586 - Update to the May 1 2011 Maxmind GeoLite Country database.
27589 - Authorities now clean their microdesc cache periodically and when
27590 reading from disk initially, not only when adding new descriptors.
27591 This prevents a bug where we could lose microdescriptors. Bugfix
27592 on 0.2.2.6-alpha. Fixes bug 2230.
27593 - Do not crash when our configuration file becomes unreadable, for
27594 example due to a permissions change, between when we start up
27595 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
27597 - Avoid a bug that would keep us from replacing a microdescriptor
27598 cache on Windows. (We would try to replace the file while still
27599 holding it open. That's fine on Unix, but Windows doesn't let us
27600 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
27601 - Add missing explanations for the authority-related torrc options
27602 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
27603 man page. Resolves issue 2379.
27604 - As an authority, do not upload our own vote or signature set to
27605 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
27606 it would get flagged as a duplicate. Resolves bug 3026.
27607 - Accept hidden service descriptors if we think we might be a hidden
27608 service directory, regardless of what our consensus says. This
27609 helps robustness, since clients and hidden services can sometimes
27610 have a more up-to-date view of the network consensus than we do,
27611 and if they think that the directory authorities list us a HSDir,
27612 we might actually be one. Related to bug 2732; bugfix on
27614 - When a controller changes TrackHostExits, remove mappings for
27615 hosts that should no longer have their exits tracked. Bugfix on
27617 - When a controller changes VirtualAddrNetwork, remove any mappings
27618 for hosts that were automapped to the old network. Bugfix on
27620 - When a controller changes one of the AutomapHosts* options, remove
27621 any mappings for hosts that should no longer be automapped. Bugfix
27623 - Do not reset the bridge descriptor download status every time we
27624 re-parse our configuration or get a configuration change. Fixes
27625 bug 3019; bugfix on 0.2.0.3-alpha.
27627 o Minor bugfixes (code cleanup):
27628 - When loading the microdesc journal, remember its current size.
27629 In 0.2.2, this helps prevent the microdesc journal from growing
27630 without limit on authorities (who are the only ones to use it in
27631 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
27632 Fix posted by "cypherpunks."
27633 - The microdesc journal is supposed to get rebuilt only if it is
27634 at least _half_ the length of the store, not _twice_ the length
27635 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
27636 - Fix a potential null-pointer dereference while computing a
27637 consensus. Bugfix on 0.2.0.3-alpha, found with the help of
27639 - Avoid a possible null-pointer dereference when rebuilding the mdesc
27640 cache without actually having any descriptors to cache. Bugfix on
27641 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
27642 - If we fail to compute the identity digest of a v3 legacy keypair,
27643 warn, and don't use a buffer-full of junk instead. Bugfix on
27644 0.2.1.1-alpha; fixes bug 3106.
27645 - Resolve an untriggerable issue in smartlist_string_num_isin(),
27646 where if the function had ever in the future been used to check
27647 for the presence of a too-large number, it would have given an
27648 incorrect result. (Fortunately, we only used it for 16-bit
27649 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
27650 - Require that introduction point keys and onion handshake keys
27651 have a public exponent of 65537. Starts to fix bug 3207; bugfix
27654 o Removed features:
27655 - Caches no longer download and serve v2 networkstatus documents
27656 unless FetchV2Networkstatus flag is set: these documents haven't
27657 haven't been used by clients or relays since 0.2.0.x. Resolves
27661 Changes in version 0.2.3.1-alpha - 2011-05-05
27662 Tor 0.2.3.1-alpha adds some new experimental features, including support
27663 for an improved network IO backend, IOCP networking on Windows,
27664 microdescriptor caching, "fast-start" support for streams, and automatic
27665 home router configuration. There are also numerous internal improvements
27666 to try to make the code easier for developers to work with.
27668 This is the first alpha release in a new series, so expect there to be
27669 bugs. Users who would rather test out a more stable branch should
27670 stay with 0.2.2.x for now.
27673 - Tor can now optionally build with the "bufferevents" buffered IO
27674 backend provided by Libevent 2. To use this feature, make sure you
27675 have the latest possible version of Libevent, and pass the
27676 --enable-bufferevents flag to configure when building Tor from
27677 source. This feature will make our networking code more flexible,
27678 let us stack layers on each other, and let us use more efficient
27679 zero-copy transports where available.
27680 - As an experimental feature, Tor can use IOCP for networking on Windows.
27681 Once this code is tuned and optimized, it promises much better
27682 performance than the select-based backend we've used in the past. To
27683 try this feature, you must build Tor with Libevent 2, configure Tor
27684 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
27685 your torrc. There are known bugs here: only try this if you can help
27686 debug it as it breaks.
27687 - The EntryNodes option can now include country codes like {de} or IP
27688 addresses or network masks. Previously we had disallowed these options
27689 because we didn't have an efficient way to keep the list up to
27690 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
27691 - Exit nodes now accept and queue data on not-yet-connected streams.
27692 Previously, the client wasn't allowed to send data until the stream was
27693 connected, which slowed down all connections. This change will enable
27694 clients to perform a "fast-start" on streams and send data without
27695 having to wait for a confirmation that the stream has opened. (Patch
27696 from Ian Goldberg; implements the server side of Proposal 174.)
27697 - Tor now has initial support for automatic port mapping on the many
27698 home routers that support NAT-PMP or UPnP. (Not yet supported on
27699 Windows). To build the support code, you'll need to have libnatpnp
27700 library and/or the libminiupnpc library, and you'll need to enable the
27701 feature specifically by passing "--enable-upnp" and/or
27702 "--enable-natpnp" to configure. To turn it on, use the new
27703 PortForwarding option.
27704 - Caches now download, cache, and serve multiple "flavors" of the
27705 consensus, including a flavor that describes microdescriptors.
27706 - Caches now download, cache, and serve microdescriptors -- small
27707 summaries of router descriptors that are authenticated by all of the
27708 directory authorities. Once enough caches are running this code,
27709 clients will be able to save significant amounts of directory bandwidth
27710 by downloading microdescriptors instead of router descriptors.
27713 - Make logging resolution configurable with a new LogTimeGranularity
27714 option, and change the default from 1 millisecond to 1 second.
27715 Implements enhancement 1668.
27716 - We log which torrc file we're using on startup. Implements ticket
27718 - Ordinarily, Tor does not count traffic from private addresses (like
27719 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
27720 There is now a new option, CountPrivateBandwidth, to disable this
27721 behavior. Patch from Daniel Cagara.
27722 - New --enable-static-tor configure option for building Tor as
27723 statically as possible. Idea, general hackery and thoughts from
27724 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
27726 - If you set the NumCPUs option to 0, Tor will now try to detect how
27727 many CPUs you have. This is the new default behavior.
27728 - Turn on directory request statistics by default and include them in
27729 extra-info descriptors. Don't break if we have no GeoIP database.
27730 - Relays that set "ConnDirectionStatistics 1" write statistics on the
27731 bidirectional use of connections to disk every 24 hours.
27732 - Add a GeoIP file digest to the extra-info descriptor. Implements
27734 - The NodeFamily option -- which let you declare that you want to
27735 consider nodes to be part of a family whether they list themselves
27736 that way or not -- now allows IP address ranges and country codes.
27737 - Add a new 'Heartbeat' log message type to periodically log a message
27738 describing Tor's status at level Notice. This feature is meant for
27739 operators who log at notice, and want to make sure that their Tor
27740 server is still working. Implementation by George Kadianakis.
27742 o Minor bugfixes (on 0.2.2.25-alpha):
27743 - When loading the microdesc journal, remember its current size.
27744 In 0.2.2, this helps prevent the microdesc journal from growing
27745 without limit on authorities (who are the only ones to use it in
27746 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
27747 Fix posted by "cypherpunks."
27748 - The microdesc journal is supposed to get rebuilt only if it is
27749 at least _half_ the length of the store, not _twice_ the length
27750 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
27751 - If as an authority we fail to compute the identity digest of a v3
27752 legacy keypair, warn, and don't use a buffer-full of junk instead.
27753 Bugfix on 0.2.1.1-alpha; fixes bug 3106.
27754 - Authorities now clean their microdesc cache periodically and when
27755 reading from disk initially, not only when adding new descriptors.
27756 This prevents a bug where we could lose microdescriptors. Bugfix
27759 o Minor features (controller):
27760 - Add a new SIGNAL event to the controller interface so that
27761 controllers can be notified when Tor handles a signal. Resolves
27762 issue 1955. Patch by John Brooks.
27763 - Add a new GETINFO option to get total bytes read and written. Patch
27764 from pipe, revised by atagar. Resolves ticket 2345.
27765 - Implement some GETINFO controller fields to provide information about
27766 the Tor process's pid, euid, username, and resource limits.
27769 - Our build system requires automake 1.6 or later to create the
27770 Makefile.in files. Previously, you could have used 1.4.
27771 This only affects developers and people building Tor from git;
27772 people who build Tor from the source distribution without changing
27773 the Makefile.am files should be fine.
27774 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
27775 so on. This is more robust against some of the failure modes
27776 associated with running the autotools pieces on their own.
27778 o Minor packaging issues:
27779 - On OpenSUSE, create the /var/run/tor directory on startup if it is not
27780 already created. Patch from Andreas Stieger. Fixes bug 2573.
27782 o Code simplifications and refactoring:
27783 - A major revision to our internal node-selecting and listing logic.
27784 Tor already had at least two major ways to look at the question of
27785 "which Tor servers do we know about": a list of router descriptors,
27786 and a list of entries in the current consensus. With
27787 microdescriptors, we're adding a third. Having so many systems
27788 without an abstraction layer over them was hurting the codebase.
27789 Now, we have a new "node_t" abstraction that presents a consistent
27790 interface to a client's view of a Tor node, and holds (nearly) all
27791 of the mutable state formerly in routerinfo_t and routerstatus_t.
27792 - The helper programs tor-gencert, tor-resolve, and tor-checkkey
27793 no longer link against Libevent: they never used it, but
27794 our library structure used to force them to link it.
27796 o Removed features:
27797 - Remove some old code to work around even older versions of Tor that
27798 used forked processes to handle DNS requests. Such versions of Tor
27799 are no longer in use as servers.
27801 o Documentation fixes:
27802 - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
27803 - Add missing documentation for the authority-related torrc options
27804 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
27808 Changes in version 0.2.2.25-alpha - 2011-04-29
27809 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
27810 robust, routers no longer overreport their bandwidth, Win7 should crash
27811 a little less, and NEWNYM (as used by Vidalia's "new identity" button)
27812 now prevents hidden service-related activity from being linkable. It
27813 provides more information to Vidalia so you can see if your bridge is
27814 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
27815 StrictNodes configuration options to make them more reliable, more
27816 understandable, and more regularly applied. If you use those options,
27817 please see the revised documentation for them in the manual page.
27820 - Relays were publishing grossly inflated bandwidth values because
27821 they were writing their state files wrong--now they write the
27822 correct value. Also, resume reading bandwidth history from the
27823 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
27824 - Improve hidden service robustness: When we find that we have
27825 extended a hidden service's introduction circuit to a relay not
27826 listed as an introduction point in the HS descriptor we currently
27827 have, retry with an introduction point from the current
27828 descriptor. Previously we would just give up. Fixes bugs 1024 and
27829 1930; bugfix on 0.2.0.10-alpha.
27830 - Clients now stop trying to use an exit node associated with a given
27831 destination by TrackHostExits if they fail to reach that exit node.
27832 Fixes bug 2999. Bugfix on 0.2.0.20-rc.
27833 - Fix crash bug on platforms where gmtime and localtime can return
27834 NULL. Windows 7 users were running into this one. Fixes part of bug
27835 2077. Bugfix on all versions of Tor. Found by boboper.
27837 o Security and stability fixes:
27838 - Don't double-free a parsable, but invalid, microdescriptor, even if
27839 it is followed in the blob we're parsing by an unparsable
27840 microdescriptor. Fixes an issue reported in a comment on bug 2954.
27841 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
27842 - If the Nickname configuration option isn't given, Tor would pick a
27843 nickname based on the local hostname as the nickname for a relay.
27844 Because nicknames are not very important in today's Tor and the
27845 "Unnamed" nickname has been implemented, this is now problematic
27846 behavior: It leaks information about the hostname without being
27847 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
27848 introduced the Unnamed nickname. Reported by tagnaq.
27849 - Fix an uncommon assertion failure when running with DNSPort under
27850 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
27851 - Avoid linkability based on cached hidden service descriptors: forget
27852 all hidden service descriptors cached as a client when processing a
27853 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
27856 - Export GeoIP information on bridge usage to controllers even if we
27857 have not yet been running for 24 hours. Now Vidalia bridge operators
27858 can get more accurate and immediate feedback about their
27859 contributions to the network.
27861 o Major features and bugfixes (node selection):
27862 - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
27863 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
27864 options. Previously, we had been ambiguous in describing what
27865 counted as an "exit" node, and what operations exactly "StrictNodes
27866 0" would permit. This created confusion when people saw nodes built
27867 through unexpected circuits, and made it hard to tell real bugs from
27868 surprises. Now the intended behavior is:
27869 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
27870 a node that delivers user traffic outside the Tor network.
27871 . "Entry", in the context of EntryNodes, means a node used as the
27872 first hop of a multihop circuit. It doesn't include direct
27873 connections to directory servers.
27874 . "ExcludeNodes" applies to all nodes.
27875 . "StrictNodes" changes the behavior of ExcludeNodes only. When
27876 StrictNodes is set, Tor should avoid all nodes listed in
27877 ExcludeNodes, even when it will make user requests fail. When
27878 StrictNodes is *not* set, then Tor should follow ExcludeNodes
27879 whenever it can, except when it must use an excluded node to
27880 perform self-tests, connect to a hidden service, provide a
27881 hidden service, fulfill a .exit request, upload directory
27882 information, or fetch directory information.
27883 Collectively, the changes to implement the behavior fix bug 1090.
27884 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
27885 a node is listed in both, it's treated as excluded.
27886 - ExcludeNodes now applies to directory nodes -- as a preference if
27887 StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
27888 Don't exclude all the directory authorities and set StrictNodes to 1
27889 unless you really want your Tor to break.
27890 - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
27891 - ExcludeExitNodes now overrides .exit requests.
27892 - We don't use bridges listed in ExcludeNodes.
27893 - When StrictNodes is 1:
27894 . We now apply ExcludeNodes to hidden service introduction points
27895 and to rendezvous points selected by hidden service users. This
27896 can make your hidden service less reliable: use it with caution!
27897 . If we have used ExcludeNodes on ourself, do not try relay
27898 reachability self-tests.
27899 . If we have excluded all the directory authorities, we will not
27900 even try to upload our descriptor if we're a relay.
27901 . Do not honor .exit requests to an excluded node.
27902 - Remove a misfeature that caused us to ignore the Fast/Stable flags
27903 when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
27904 - When the set of permitted nodes changes, we now remove any mappings
27905 introduced via TrackExitHosts to now-excluded nodes. Bugfix on
27907 - We never cannibalize a circuit that had excluded nodes on it, even
27908 if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
27909 - Revert a change where we would be laxer about attaching streams to
27910 circuits than when building the circuits. This was meant to prevent
27911 a set of bugs where streams were never attachable, but our improved
27912 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
27913 - Keep track of how many times we launch a new circuit to handle a
27914 given stream. Too many launches could indicate an inconsistency
27915 between our "launch a circuit to handle this stream" logic and our
27916 "attach this stream to one of the available circuits" logic.
27917 - Improve log messages related to excluded nodes.
27920 - Fix a spurious warning when moving from a short month to a long
27921 month on relays with month-based BandwidthAccounting. Bugfix on
27922 0.2.2.17-alpha; fixes bug 3020.
27923 - When a client finds that an origin circuit has run out of 16-bit
27924 stream IDs, we now mark it as unusable for new streams. Previously,
27925 we would try to close the entire circuit. Bugfix on 0.0.6.
27926 - Add a forgotten cast that caused a compile warning on OS X 10.6.
27927 Bugfix on 0.2.2.24-alpha.
27928 - Be more careful about reporting the correct error from a failed
27929 connect() system call. Under some circumstances, it was possible to
27930 look at an incorrect value for errno when sending the end reason.
27931 Bugfix on 0.1.0.1-rc.
27932 - Correctly handle an "impossible" overflow cases in connection byte
27933 counting, where we write or read more than 4GB on an edge connection
27934 in a single second. Bugfix on 0.1.2.8-beta.
27935 - Correct the warning displayed when a rendezvous descriptor exceeds
27936 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
27938 - Clients and hidden services now use HSDir-flagged relays for hidden
27939 service descriptor downloads and uploads even if the relays have no
27940 DirPort set and the client has disabled TunnelDirConns. This will
27941 eventually allow us to give the HSDir flag to relays with no
27942 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
27943 - Downgrade "no current certificates known for authority" message from
27944 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
27945 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
27946 2917. Bugfix on 0.1.1.1-alpha.
27947 - Only limit the lengths of single HS descriptors, even when multiple
27948 HS descriptors are published to an HSDir relay in a single POST
27949 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
27950 - Write the current time into the LastWritten line in our state file,
27951 rather than the time from the previous write attempt. Also, stop
27952 trying to use a time of -1 in our log statements. Fixes bug 3039;
27953 bugfix on 0.2.2.14-alpha.
27954 - Be more consistent in our treatment of file system paths. "~" should
27955 get expanded to the user's home directory in the Log config option.
27956 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
27957 feature for the -f and --DataDirectory options.
27960 - Make sure every relay writes a state file at least every 12 hours.
27961 Previously, a relay could go for weeks without writing its state
27962 file, and on a crash could lose its bandwidth history, capacity
27963 estimates, client country statistics, and so on. Addresses bug 3012.
27964 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
27965 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
27966 clients are already deprecated because of security bugs.
27967 - Don't allow v0 hidden service authorities to act as clients.
27968 Required by fix for bug 3000.
27969 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
27970 by fix for bug 3000.
27971 - Ensure that no empty [dirreq-](read|write)-history lines are added
27972 to an extrainfo document. Implements ticket 2497.
27974 o Code simplification and refactoring:
27975 - Remove workaround code to handle directory responses from servers
27976 that had bug 539 (they would send HTTP status 503 responses _and_
27977 send a body too). Since only server versions before
27978 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
27979 keep the workaround in place.
27980 - Remove the old 'fuzzy time' logic. It was supposed to be used for
27981 handling calculations where we have a known amount of clock skew and
27982 an allowed amount of unknown skew. But we only used it in three
27983 places, and we never adjusted the known/unknown skew values. This is
27984 still something we might want to do someday, but if we do, we'll
27985 want to do it differently.
27986 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
27987 None of the cases where we did this before were wrong, but by making
27988 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
27989 - Use GetTempDir to find the proper temporary directory location on
27990 Windows when generating temporary files for the unit tests. Patch by
27994 Changes in version 0.2.2.24-alpha - 2011-04-08
27995 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
27996 prevented Tor clients from effectively using "multihomed" bridges,
27997 that is, bridges that listen on multiple ports or IP addresses so users
27998 can continue to use some of their addresses even if others get blocked.
28001 - Fix a bug where bridge users who configure the non-canonical
28002 address of a bridge automatically switch to its canonical
28003 address. If a bridge listens at more than one address, it should be
28004 able to advertise those addresses independently and any non-blocked
28005 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
28007 - If you configured Tor to use bridge A, and then quit and
28008 configured Tor to use bridge B instead, it would happily continue
28009 to use bridge A if it's still reachable. While this behavior is
28010 a feature if your goal is connectivity, in some scenarios it's a
28011 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
28012 - Directory authorities now use data collected from their own
28013 uptime observations when choosing whether to assign the HSDir flag
28014 to relays, instead of trusting the uptime value the relay reports in
28015 its descriptor. This change helps prevent an attack where a small
28016 set of nodes with frequently-changing identity keys can blackhole
28017 a hidden service. (Only authorities need upgrade; others will be
28018 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
28021 - When we restart our relay, we might get a successful connection
28022 from the outside before we've started our reachability tests,
28023 triggering a warning: "ORPort found reachable, but I have no
28024 routerinfo yet. Failing to inform controller of success." This
28025 bug was harmless unless Tor is running under a controller
28026 like Vidalia, in which case the controller would never get a
28027 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
28029 - Make directory authorities more accurate at recording when
28030 relays that have failed several reachability tests became
28031 unreachable, so we can provide more accuracy at assigning Stable,
28032 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
28033 - Fix an issue that prevented static linking of libevent on
28034 some platforms (notably Linux). Fixes bug 2698; bugfix on
28035 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
28036 the --with-static-libevent configure option).
28037 - We now ask the other side of a stream (the client or the exit)
28038 for more data on that stream when the amount of queued data on
28039 that stream dips low enough. Previously, we wouldn't ask the
28040 other side for more data until either it sent us more data (which
28041 it wasn't supposed to do if it had exhausted its window!) or we
28042 had completely flushed all our queued data. This flow control fix
28043 should improve throughput. Fixes bug 2756; bugfix on the earliest
28044 released versions of Tor (svn commit r152).
28045 - Avoid a double-mark-for-free warning when failing to attach a
28046 transparent proxy connection. (We thought we had fixed this in
28047 0.2.2.23-alpha, but it turns out our fix was checking the wrong
28048 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
28049 bug) and 0.2.2.23-alpha (the incorrect fix).
28050 - When warning about missing zlib development packages during compile,
28051 give the correct package names. Bugfix on 0.2.0.1-alpha.
28054 - Directory authorities now log the source of a rejected POSTed v3
28055 networkstatus vote.
28056 - Make compilation with clang possible when using
28057 --enable-gcc-warnings by removing two warning options that clang
28058 hasn't implemented yet and by fixing a few warnings. Implements
28060 - When expiring circuits, use microsecond timers rather than
28061 one-second timers. This can avoid an unpleasant situation where a
28062 circuit is launched near the end of one second and expired right
28063 near the beginning of the next, and prevent fluctuations in circuit
28065 - Use computed circuit-build timeouts to decide when to launch
28066 parallel introduction circuits for hidden services. (Previously,
28067 we would retry after 15 seconds.)
28068 - Update to the April 1 2011 Maxmind GeoLite Country database.
28071 - Create the /var/run/tor directory on startup on OpenSUSE if it is
28072 not already created. Patch from Andreas Stieger. Fixes bug 2573.
28074 o Documentation changes:
28075 - Modernize the doxygen configuration file slightly. Fixes bug 2707.
28076 - Resolve all doxygen warnings except those for missing documentation.
28078 - Add doxygen documentation for more functions, fields, and types.
28081 Changes in version 0.2.2.23-alpha - 2011-03-08
28082 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
28083 they restart they don't lose their bandwidth capacity estimate. This
28084 release also fixes a diverse set of user-facing bugs, ranging from
28085 relays overrunning their rate limiting to clients falsely warning about
28086 clock skew to bridge descriptor leaks by our bridge directory authority.
28089 - Stop sending a CLOCK_SKEW controller status event whenever
28090 we fetch directory information from a relay that has a wrong clock.
28091 Instead, only inform the controller when it's a trusted authority
28092 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
28093 the rest of bug 1074.
28094 - Fix an assert in parsing router descriptors containing IPv6
28095 addresses. This one took down the directory authorities when
28096 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
28097 - Make the bridge directory authority refuse to answer directory
28098 requests for "all" descriptors. It used to include bridge
28099 descriptors in its answer, which was a major information leak.
28100 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
28101 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
28102 Tor would ignore their RelayBandwidthBurst setting,
28103 potentially using more bandwidth than expected. Bugfix on
28104 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
28105 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
28106 hidserv" in her torrc. The 'hidserv' argument never controlled
28107 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
28110 - Relays now save observed peak bandwidth throughput rates to their
28111 state file (along with total usage, which was already saved)
28112 so that they can determine their correct estimated bandwidth on
28113 restart. Resolves bug 1863, where Tor relays would reset their
28114 estimated bandwidth to 0 after restarting.
28115 - Directory authorities now take changes in router IP address and
28116 ORPort into account when determining router stability. Previously,
28117 if a router changed its IP or ORPort, the authorities would not
28118 treat it as having any downtime for the purposes of stability
28119 calculation, whereas clients would experience downtime since the
28120 change could take a while to propagate to them. Resolves issue 1035.
28121 - Enable Address Space Layout Randomization (ASLR) and Data Execution
28122 Prevention (DEP) by default on Windows to make it harder for
28123 attackers to exploit vulnerabilities. Patch from John Brooks.
28125 o Minor bugfixes (on 0.2.1.x and earlier):
28126 - Fix a rare crash bug that could occur when a client was configured
28127 with a large number of bridges. Fixes bug 2629; bugfix on
28128 0.2.1.2-alpha. Bugfix by trac user "shitlei".
28129 - Avoid a double mark-for-free warning when failing to attach a
28130 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
28132 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
28133 found by "cypherpunks". This bug was introduced before the first
28134 Tor release, in svn commit r110.
28135 - Country codes aren't supported in EntryNodes until 0.2.3.x, so
28136 don't mention them in the manpage. Fixes bug 2450; issue
28137 spotted by keb and G-Lo.
28138 - Fix a bug in bandwidth history state parsing that could have been
28139 triggered if a future version of Tor ever changed the timing
28140 granularity at which bandwidth history is measured. Bugfix on
28141 Tor 0.1.1.11-alpha.
28142 - When a relay decides that its DNS is too broken for it to serve
28143 as an exit server, it advertised itself as a non-exit, but
28144 continued to act as an exit. This could create accidental
28145 partitioning opportunities for users. Instead, if a relay is
28146 going to advertise reject *:* as its exit policy, it should
28147 really act with exit policy "reject *:*". Fixes bug 2366.
28148 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
28149 - In the special case where you configure a public exit relay as your
28150 bridge, Tor would be willing to use that exit relay as the last
28151 hop in your circuit as well. Now we fail that circuit instead.
28152 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
28153 - Fix a bug with our locking implementation on Windows that couldn't
28154 correctly detect when a file was already locked. Fixes bug 2504,
28155 bugfix on 0.2.1.6-alpha.
28156 - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
28157 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
28159 - Set target port in get_interface_address6() correctly. Bugfix
28160 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
28161 - Directory authorities are now more robust to hops back in time
28162 when calculating router stability. Previously, if a run of uptime
28163 or downtime appeared to be negative, the calculation could give
28164 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
28166 - Fix an assert that got triggered when using the TestingTorNetwork
28167 configuration option and then issuing a GETINFO config-text control
28168 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
28170 o Minor bugfixes (on 0.2.2.x):
28171 - Clients should not weight BadExit nodes as Exits in their node
28172 selection. Similarly, directory authorities should not count BadExit
28173 bandwidth as Exit bandwidth when computing bandwidth-weights.
28174 Bugfix on 0.2.2.10-alpha; fixes bug 2203.
28175 - Correctly clear our dir_read/dir_write history when there is an
28176 error parsing any bw history value from the state file. Bugfix on
28177 Tor 0.2.2.15-alpha.
28178 - Resolve a bug in verifying signatures of directory objects
28179 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
28180 Fixes bug 2409. Found by "piebeer".
28181 - Bridge authorities no longer crash on SIGHUP when they try to
28182 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
28186 - Log less aggressively about circuit timeout changes, and improve
28187 some other circuit timeout messages. Resolves bug 2004.
28188 - Log a little more clearly about the times at which we're no longer
28189 accepting new connections. Resolves bug 2181.
28190 - Reject attempts at the client side to open connections to private
28191 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
28192 a randomly chosen exit node. Attempts to do so are always
28193 ill-defined, generally prevented by exit policies, and usually
28194 in error. This will also help to detect loops in transparent
28195 proxy configurations. You can disable this feature by setting
28196 "ClientRejectInternalAddresses 0" in your torrc.
28197 - Always treat failure to allocate an RSA key as an unrecoverable
28199 - Update to the March 1 2011 Maxmind GeoLite Country database.
28201 o Minor features (log subsystem):
28202 - Add documentation for configuring logging at different severities in
28203 different log domains. We've had this feature since 0.2.1.1-alpha,
28204 but for some reason it never made it into the manpage. Fixes
28206 - Make it simpler to specify "All log domains except for A and B".
28207 Previously you needed to say "[*,~A,~B]". Now you can just say
28209 - Add a "LogMessageDomains 1" option to include the domains of log
28210 messages along with the messages. Without this, there's no way
28211 to use log domains without reading the source or doing a lot
28214 o Packaging changes:
28215 - Stop shipping the Tor specs files and development proposal documents
28216 in the tarball. They are now in a separate git repository at
28217 git://git.torproject.org/torspec.git
28220 Changes in version 0.2.1.30 - 2011-02-23
28221 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
28222 change is a slight tweak to Tor's TLS handshake that makes relays
28223 and bridges that run this new version reachable from Iran again.
28224 We don't expect this tweak will win the arms race long-term, but it
28225 buys us time until we roll out a better solution.
28228 - Stop sending a CLOCK_SKEW controller status event whenever
28229 we fetch directory information from a relay that has a wrong clock.
28230 Instead, only inform the controller when it's a trusted authority
28231 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
28232 the rest of bug 1074.
28233 - Fix a bounds-checking error that could allow an attacker to
28234 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
28235 Found by "piebeer".
28236 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
28237 Tor would ignore their RelayBandwidthBurst setting,
28238 potentially using more bandwidth than expected. Bugfix on
28239 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
28240 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
28241 hidserv" in her torrc. The 'hidserv' argument never controlled
28242 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
28245 - Adjust our TLS Diffie-Hellman parameters to match those used by
28247 - Update to the February 1 2011 Maxmind GeoLite Country database.
28250 - Check for and reject overly long directory certificates and
28251 directory tokens before they have a chance to hit any assertions.
28252 Bugfix on 0.2.1.28. Found by "doorss".
28253 - Bring the logic that gathers routerinfos and assesses the
28254 acceptability of circuits into line. This prevents a Tor OP from
28255 getting locked in a cycle of choosing its local OR as an exit for a
28256 path (due to a .exit request) and then rejecting the circuit because
28257 its OR is not listed yet. It also prevents Tor clients from using an
28258 OR running in the same instance as an exit (due to a .exit request)
28259 if the OR does not meet the same requirements expected of an OR
28260 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
28262 o Packaging changes:
28263 - Stop shipping the Tor specs files and development proposal documents
28264 in the tarball. They are now in a separate git repository at
28265 git://git.torproject.org/torspec.git
28266 - Do not include Git version tags as though they are SVN tags when
28267 generating a tarball from inside a repository that has switched
28268 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
28271 Changes in version 0.2.2.22-alpha - 2011-01-25
28272 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
28273 main other change is a slight tweak to Tor's TLS handshake that makes
28274 relays and bridges that run this new version reachable from Iran again.
28275 We don't expect this tweak will win the arms race long-term, but it
28276 will buy us a bit more time until we roll out a better solution.
28279 - Fix a bounds-checking error that could allow an attacker to
28280 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
28281 Found by "piebeer".
28282 - Don't assert when changing from bridge to relay or vice versa
28283 via the controller. The assert happened because we didn't properly
28284 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
28285 bug 2433. Reported by bastik.
28288 - Adjust our TLS Diffie-Hellman parameters to match those used by
28290 - Provide a log message stating which geoip file we're parsing
28291 instead of just stating that we're parsing the geoip file.
28292 Implements ticket 2432.
28295 - Check for and reject overly long directory certificates and
28296 directory tokens before they have a chance to hit any assertions.
28297 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
28300 Changes in version 0.2.2.21-alpha - 2011-01-15
28301 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
28302 continues our recent code security audit work. The main fix resolves
28303 a remote heap overflow vulnerability that can allow remote code
28304 execution (CVE-2011-0427). Other fixes address a variety of assert
28305 and crash bugs, most of which we think are hard to exploit remotely.
28307 o Major bugfixes (security), also included in 0.2.1.29:
28308 - Fix a heap overflow bug where an adversary could cause heap
28309 corruption. This bug probably allows remote code execution
28310 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
28312 - Prevent a denial-of-service attack by disallowing any
28313 zlib-compressed data whose compression factor is implausibly
28314 high. Fixes part of bug 2324; reported by "doorss".
28315 - Zero out a few more keys in memory before freeing them. Fixes
28316 bug 2384 and part of bug 2385. These key instances found by
28317 "cypherpunks", based on Andrew Case's report about being able
28318 to find sensitive data in Tor's memory space if you have enough
28319 permissions. Bugfix on 0.0.2pre9.
28321 o Major bugfixes (crashes), also included in 0.2.1.29:
28322 - Prevent calls to Libevent from inside Libevent log handlers.
28323 This had potential to cause a nasty set of crashes, especially
28324 if running Libevent with debug logging enabled, and running
28325 Tor with a controller watching for low-severity log messages.
28326 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
28327 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
28328 underflow errors there too. Fixes the other part of bug 2324.
28329 - Fix a bug where we would assert if we ever had a
28330 cached-descriptors.new file (or another file read directly into
28331 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
28332 on 0.2.1.25. Found by doorss.
28333 - Fix some potential asserts and parsing issues with grossly
28334 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
28337 o Minor bugfixes (other), also included in 0.2.1.29:
28338 - Fix a bug with handling misformed replies to reverse DNS lookup
28339 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
28340 bug reported by doorss.
28341 - Fix compilation on mingw when a pthreads compatibility library
28342 has been installed. (We don't want to use it, so we shouldn't
28343 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
28344 - Fix a bug where we would declare that we had run out of virtual
28345 addresses when the address space was only half-exhausted. Bugfix
28347 - Correctly handle the case where AutomapHostsOnResolve is set but
28348 no virtual addresses are available. Fixes bug 2328; bugfix on
28349 0.1.2.1-alpha. Bug found by doorss.
28350 - Correctly handle wrapping around when we run out of virtual
28351 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
28353 o Minor features, also included in 0.2.1.29:
28354 - Update to the January 1 2011 Maxmind GeoLite Country database.
28355 - Introduce output size checks on all of our decryption functions.
28357 o Build changes, also included in 0.2.1.29:
28358 - Tor does not build packages correctly with Automake 1.6 and earlier;
28359 added a check to Makefile.am to make sure that we're building with
28360 Automake 1.7 or later.
28361 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
28362 because we built it with a too-old version of automake. Thus that
28363 release broke ./configure --enable-openbsd-malloc, which is popular
28364 among really fast exit relays on Linux.
28366 o Major bugfixes, new in 0.2.2.21-alpha:
28367 - Prevent crash/heap corruption when the cbtnummodes consensus
28368 parameter is set to 0 or large values. Fixes bug 2317; bugfix
28371 o Major features, new in 0.2.2.21-alpha:
28372 - Introduce minimum/maximum values that clients will believe
28373 from the consensus. Now we'll have a better chance to avoid crashes
28374 or worse when a consensus param has a weird value.
28376 o Minor features, new in 0.2.2.21-alpha:
28377 - Make sure to disable DirPort if running as a bridge. DirPorts aren't
28378 used on bridges, and it makes bridge scanning somewhat easier.
28379 - If writing the state file to disk fails, wait up to an hour before
28380 retrying again, rather than trying again each second. Fixes bug
28381 2346; bugfix on Tor 0.1.1.3-alpha.
28382 - Make Libevent log messages get delivered to controllers later,
28383 and not from inside the Libevent log handler. This prevents unsafe
28384 reentrant Libevent calls while still letting the log messages
28386 - Detect platforms that brokenly use a signed size_t, and refuse to
28387 build there. Found and analyzed by doorss and rransom.
28388 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
28391 o Minor bugfixes, new in 0.2.2.21-alpha:
28392 - Handle SOCKS messages longer than 128 bytes long correctly, rather
28393 than waiting forever for them to finish. Fixes bug 2330; bugfix
28394 on 0.2.0.16-alpha. Found by doorss.
28395 - Add assertions to check for overflow in arguments to
28396 base32_encode() and base32_decode(); fix a signed-unsigned
28397 comparison there too. These bugs are not actually reachable in Tor,
28398 but it's good to prevent future errors too. Found by doorss.
28399 - Correctly detect failures to create DNS requests when using Libevent
28400 versions before v2. (Before Libevent 2, we used our own evdns
28401 implementation. Its return values for Libevent's evdns_resolve_*()
28402 functions are not consistent with those from Libevent.) Fixes bug
28403 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
28405 o Documentation, new in 0.2.2.21-alpha:
28406 - Document the default socks host and port (127.0.0.1:9050) for
28410 Changes in version 0.2.1.29 - 2011-01-15
28411 Tor 0.2.1.29 continues our recent code security audit work. The main
28412 fix resolves a remote heap overflow vulnerability that can allow remote
28413 code execution. Other fixes address a variety of assert and crash bugs,
28414 most of which we think are hard to exploit remotely.
28416 o Major bugfixes (security):
28417 - Fix a heap overflow bug where an adversary could cause heap
28418 corruption. This bug probably allows remote code execution
28419 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
28421 - Prevent a denial-of-service attack by disallowing any
28422 zlib-compressed data whose compression factor is implausibly
28423 high. Fixes part of bug 2324; reported by "doorss".
28424 - Zero out a few more keys in memory before freeing them. Fixes
28425 bug 2384 and part of bug 2385. These key instances found by
28426 "cypherpunks", based on Andrew Case's report about being able
28427 to find sensitive data in Tor's memory space if you have enough
28428 permissions. Bugfix on 0.0.2pre9.
28430 o Major bugfixes (crashes):
28431 - Prevent calls to Libevent from inside Libevent log handlers.
28432 This had potential to cause a nasty set of crashes, especially
28433 if running Libevent with debug logging enabled, and running
28434 Tor with a controller watching for low-severity log messages.
28435 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
28436 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
28437 underflow errors there too. Fixes the other part of bug 2324.
28438 - Fix a bug where we would assert if we ever had a
28439 cached-descriptors.new file (or another file read directly into
28440 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
28441 on 0.2.1.25. Found by doorss.
28442 - Fix some potential asserts and parsing issues with grossly
28443 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
28446 o Minor bugfixes (other):
28447 - Fix a bug with handling misformed replies to reverse DNS lookup
28448 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
28449 bug reported by doorss.
28450 - Fix compilation on mingw when a pthreads compatibility library
28451 has been installed. (We don't want to use it, so we shouldn't
28452 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
28453 - Fix a bug where we would declare that we had run out of virtual
28454 addresses when the address space was only half-exhausted. Bugfix
28456 - Correctly handle the case where AutomapHostsOnResolve is set but
28457 no virtual addresses are available. Fixes bug 2328; bugfix on
28458 0.1.2.1-alpha. Bug found by doorss.
28459 - Correctly handle wrapping around to when we run out of virtual
28460 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
28461 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
28462 because we built it with a too-old version of automake. Thus that
28463 release broke ./configure --enable-openbsd-malloc, which is popular
28464 among really fast exit relays on Linux.
28467 - Update to the January 1 2011 Maxmind GeoLite Country database.
28468 - Introduce output size checks on all of our decryption functions.
28471 - Tor does not build packages correctly with Automake 1.6 and earlier;
28472 added a check to Makefile.am to make sure that we're building with
28473 Automake 1.7 or later.
28476 Changes in version 0.2.2.20-alpha - 2010-12-17
28477 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
28478 exploitable bugs. We also fix a variety of other significant bugs,
28479 change the IP address for one of our directory authorities, and update
28480 the minimum version that Tor relays must run to join the network.
28483 - Fix a remotely exploitable bug that could be used to crash instances
28484 of Tor remotely by overflowing on the heap. Remote-code execution
28485 hasn't been confirmed, but can't be ruled out. Everyone should
28486 upgrade. Bugfix on the 0.1.1 series and later.
28487 - Fix a bug that could break accounting on 64-bit systems with large
28488 time_t values, making them hibernate for impossibly long intervals.
28489 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
28490 - Fix a logic error in directory_fetches_from_authorities() that
28491 would cause all _non_-exits refusing single-hop-like circuits
28492 to fetch from authorities, when we wanted to have _exits_ fetch
28493 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
28495 - Fix a stream fairness bug that would cause newer streams on a given
28496 circuit to get preference when reading bytes from the origin or
28497 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
28498 introduced before the first Tor release, in svn revision r152.
28500 o Directory authority changes:
28501 - Change IP address and ports for gabelmoo (v3 directory authority).
28504 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
28505 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
28506 - Fix an off-by-one error in calculating some controller command
28507 argument lengths. Fortunately, this mistake is harmless since
28508 the controller code does redundant NUL termination too. Found by
28509 boboper. Bugfix on 0.1.1.1-alpha.
28510 - Do not dereference NULL if a bridge fails to build its
28511 extra-info descriptor. Found by an anonymous commenter on
28512 Trac. Bugfix on 0.2.2.19-alpha.
28515 - Update to the December 1 2010 Maxmind GeoLite Country database.
28516 - Directory authorities now reject relays running any versions of
28517 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
28518 known bugs that keep RELAY_EARLY cells from working on rendezvous
28519 circuits. Followup to fix for bug 2081.
28520 - Directory authorities now reject relays running any version of Tor
28521 older than 0.2.0.26-rc. That version is the earliest that fetches
28522 current directory information correctly. Fixes bug 2156.
28523 - Report only the top 10 ports in exit-port stats in order not to
28524 exceed the maximum extra-info descriptor length of 50 KB. Implements
28528 Changes in version 0.2.1.28 - 2010-12-17
28529 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
28530 exploitable bugs. We also took this opportunity to change the IP address
28531 for one of our directory authorities, and to update the geoip database
28535 - Fix a remotely exploitable bug that could be used to crash instances
28536 of Tor remotely by overflowing on the heap. Remote-code execution
28537 hasn't been confirmed, but can't be ruled out. Everyone should
28538 upgrade. Bugfix on the 0.1.1 series and later.
28540 o Directory authority changes:
28541 - Change IP address and ports for gabelmoo (v3 directory authority).
28544 - Update to the December 1 2010 Maxmind GeoLite Country database.
28547 Changes in version 0.2.1.27 - 2010-11-23
28548 Yet another OpenSSL security patch broke its compatibility with Tor:
28549 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
28550 also took this opportunity to fix several crash bugs, integrate a new
28551 directory authority, and update the bundled GeoIP database.
28554 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
28555 No longer set the tlsext_host_name extension on server SSL objects;
28556 but continue to set it on client SSL objects. Our goal in setting
28557 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
28558 bugfix on 0.2.1.1-alpha.
28559 - Do not log messages to the controller while shrinking buffer
28560 freelists. Doing so would sometimes make the controller connection
28561 try to allocate a buffer chunk, which would mess up the internals
28562 of the freelist and cause an assertion failure. Fixes bug 1125;
28563 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
28564 - Learn our external IP address when we're a relay or bridge, even if
28565 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
28566 where we introduced bridge relays that don't need to publish to
28567 be useful. Fixes bug 2050.
28568 - Do even more to reject (and not just ignore) annotations on
28569 router descriptors received anywhere but from the cache. Previously
28570 we would ignore such annotations at first, but cache them to disk
28571 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
28572 - When you're using bridges and your network goes away and your
28573 bridges get marked as down, recover when you attempt a new socks
28574 connection (if the network is back), rather than waiting up to an
28575 hour to try fetching new descriptors for your bridges. Bugfix on
28576 0.2.0.3-alpha; fixes bug 1981.
28579 - Move to the November 2010 Maxmind GeoLite country db (rather
28580 than the June 2009 ip-to-country GeoIP db) for our statistics that
28581 count how many users relays are seeing from each country. Now we'll
28582 have more accurate data, especially for many African countries.
28584 o New directory authorities:
28585 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
28589 - Fix an assertion failure that could occur in directory caches or
28590 bridge users when using a very short voting interval on a testing
28591 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
28593 - Enforce multiplicity rules when parsing annotations. Bugfix on
28594 0.2.0.8-alpha. Found by piebeer.
28595 - Allow handshaking OR connections to take a full KeepalivePeriod
28596 seconds to handshake. Previously, we would close them after
28597 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
28598 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
28600 - When building with --enable-gcc-warnings on OpenBSD, disable
28601 warnings in system headers. This makes --enable-gcc-warnings
28602 pass on OpenBSD 4.8.
28605 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
28606 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
28607 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
28608 Servers can start sending this code when enough clients recognize
28609 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
28610 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
28611 Patch from mingw-san.
28614 - Remove the old debian/ directory from the main Tor distribution.
28615 The official Tor-for-debian git repository lives at the URL
28616 https://git.torproject.org/debian/tor.git
28617 - Stop shipping the old doc/website/ directory in the tarball. We
28618 changed the website format in late 2010, and what we shipped in
28619 0.2.1.26 really wasn't that useful anyway.
28622 Changes in version 0.2.2.19-alpha - 2010-11-22
28623 Yet another OpenSSL security patch broke its compatibility with Tor:
28624 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
28627 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
28628 No longer set the tlsext_host_name extension on server SSL objects;
28629 but continue to set it on client SSL objects. Our goal in setting
28630 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
28631 bugfix on 0.2.1.1-alpha.
28634 - Try harder not to exceed the maximum length of 50 KB when writing
28635 statistics to extra-info descriptors. This bug was triggered by very
28636 fast relays reporting exit-port, entry, and dirreq statistics.
28637 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
28638 - Publish a router descriptor even if generating an extra-info
28639 descriptor fails. Previously we would not publish a router
28640 descriptor without an extra-info descriptor; this can cause fast
28641 exit relays collecting exit-port statistics to drop from the
28642 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
28645 Changes in version 0.2.2.18-alpha - 2010-11-16
28646 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
28647 us lately, makes unpublished bridge relays able to detect their IP
28648 address, and fixes a wide variety of other bugs to get us much closer
28649 to a stable release.
28652 - Do even more to reject (and not just ignore) annotations on
28653 router descriptors received anywhere but from the cache. Previously
28654 we would ignore such annotations at first, but cache them to disk
28655 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
28656 - Do not log messages to the controller while shrinking buffer
28657 freelists. Doing so would sometimes make the controller connection
28658 try to allocate a buffer chunk, which would mess up the internals
28659 of the freelist and cause an assertion failure. Fixes bug 1125;
28660 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
28661 - Learn our external IP address when we're a relay or bridge, even if
28662 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
28663 where we introduced bridge relays that don't need to publish to
28664 be useful. Fixes bug 2050.
28665 - Maintain separate TLS contexts and certificates for incoming and
28666 outgoing connections in bridge relays. Previously we would use the
28667 same TLS contexts and certs for incoming and outgoing connections.
28668 Bugfix on 0.2.0.3-alpha; addresses bug 988.
28669 - Maintain separate identity keys for incoming and outgoing TLS
28670 contexts in bridge relays. Previously we would use the same
28671 identity keys for incoming and outgoing TLS contexts. Bugfix on
28672 0.2.0.3-alpha; addresses the other half of bug 988.
28673 - Avoid an assertion failure when we as an authority receive a
28674 duplicate upload of a router descriptor that we already have,
28675 but which we previously considered an obsolete descriptor.
28676 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
28677 - Avoid a crash bug triggered by looking at a dangling pointer while
28678 setting the network status consensus. Found by Robert Ransom.
28679 Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
28680 - Fix a logic error where servers that _didn't_ act as exits would
28681 try to keep their server lists more aggressively up to date than
28682 exits, when it was supposed to be the other way around. Bugfix
28685 o Minor bugfixes (on Tor 0.2.1.x and earlier):
28686 - When we're trying to guess whether we know our IP address as
28687 a relay, we would log various ways that we failed to guess
28688 our address, but never log that we ended up guessing it
28689 successfully. Now add a log line to help confused and anxious
28690 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
28691 - Bring the logic that gathers routerinfos and assesses the
28692 acceptability of circuits into line. This prevents a Tor OP from
28693 getting locked in a cycle of choosing its local OR as an exit for a
28694 path (due to a .exit request) and then rejecting the circuit because
28695 its OR is not listed yet. It also prevents Tor clients from using an
28696 OR running in the same instance as an exit (due to a .exit request)
28697 if the OR does not meet the same requirements expected of an OR
28698 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
28699 - Correctly describe errors that occur when generating a TLS object.
28700 Previously we would attribute them to a failure while generating a
28701 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
28703 - Enforce multiplicity rules when parsing annotations. Bugfix on
28704 0.2.0.8-alpha. Found by piebeer.
28705 - Fix warnings that newer versions of autoconf produced during
28706 ./autogen.sh. These warnings appear to be harmless in our case,
28707 but they were extremely verbose. Fixes bug 2020.
28709 o Minor bugfixes (on Tor 0.2.2.x):
28710 - Enable protection of small arrays whenever we build with gcc
28711 hardening features, not only when also building with warnings
28712 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
28715 - Make hidden services work better in private Tor networks by not
28716 requiring any uptime to join the hidden service descriptor
28717 DHT. Implements ticket 2088.
28718 - Rate-limit the "your application is giving Tor only an IP address"
28719 warning. Addresses bug 2000; bugfix on 0.0.8pre2.
28720 - When AllowSingleHopExits is set, print a warning to explain to the
28721 relay operator why most clients are avoiding her relay.
28722 - Update to the November 1 2010 Maxmind GeoLite Country database.
28724 o Code simplifications and refactoring:
28725 - When we fixed bug 1038 we had to put in a restriction not to send
28726 RELAY_EARLY cells on rend circuits. This was necessary as long
28727 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
28728 active. Now remove this obsolete check. Resolves bug 2081.
28729 - Some options used different conventions for uppercasing of acronyms
28730 when comparing manpage and source. Fix those in favor of the
28731 manpage, as it makes sense to capitalize acronyms.
28732 - Remove the torrc.complete file. It hasn't been kept up to date
28733 and users will have better luck checking out the manpage.
28734 - Remove the obsolete "NoPublish" option; it has been flagged
28735 as obsolete and has produced a warning since 0.1.1.18-rc.
28736 - Remove everything related to building the expert bundle for OS X.
28737 It has confused many users, doesn't work right on OS X 10.6,
28738 and is hard to get rid of once installed. Resolves bug 1274.
28741 Changes in version 0.2.2.17-alpha - 2010-09-30
28742 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
28743 to use one-hop circuits (which can put the exit relays at higher risk,
28744 plus unbalance the network); fixes a big bug in bandwidth accounting
28745 for relays that want to limit their monthly bandwidth use; fixes a
28746 big pile of bugs in how clients tolerate temporary network failure;
28747 and makes our adaptive circuit build timeout feature (which improves
28748 client performance if your network is fast while not breaking things
28749 if your network is slow) better handle bad networks.
28752 - Exit relays now try harder to block exit attempts from unknown
28753 relays, to make it harder for people to use them as one-hop proxies
28754 a la tortunnel. Controlled by the refuseunknownexits consensus
28755 parameter (currently enabled), or you can override it on your
28756 relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
28758 o Major bugfixes (0.2.1.x and earlier):
28759 - Fix a bug in bandwidth accounting that could make us use twice
28760 the intended bandwidth when our interval start changes due to
28761 daylight saving time. Now we tolerate skew in stored vs computed
28762 interval starts: if the start of the period changes by no more than
28763 50% of the period's duration, we remember bytes that we transferred
28764 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
28765 - Always search the Windows system directory for system DLLs, and
28766 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
28767 - When you're using bridges and your network goes away and your
28768 bridges get marked as down, recover when you attempt a new socks
28769 connection (if the network is back), rather than waiting up to an
28770 hour to try fetching new descriptors for your bridges. Bugfix on
28771 0.2.0.3-alpha; fixes bug 1981.
28773 o Major bugfixes (on 0.2.2.x):
28774 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
28776 - Fix a segfault that could happen when operating a bridge relay with
28777 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
28778 - The consensus bandwidth-weights (used by clients to choose fast
28779 relays) entered an unexpected edge case in September where
28780 Exits were much scarcer than Guards, resulting in bad weight
28781 recommendations. Now we compute them using new constraints that
28782 should succeed in all cases. Also alter directory authorities to
28783 not include the bandwidth-weights line if they fail to produce
28784 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
28785 - When weighting bridges during path selection, we used to trust
28786 the bandwidths they provided in their descriptor, only capping them
28787 at 10MB/s. This turned out to be problematic for two reasons:
28788 Bridges could claim to handle a lot more traffic then they
28789 actually would, thus making more clients pick them and have a
28790 pretty effective DoS attack. The other issue is that new bridges
28791 that might not have a good estimate for their bw capacity yet
28792 would not get used at all unless no other bridges are available
28793 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
28795 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
28796 - Ignore cannibalized circuits when recording circuit build times.
28797 This should provide for a minor performance improvement for hidden
28798 service users using 0.2.2.14-alpha, and should remove two spurious
28799 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
28800 - Simplify the logic that causes us to decide if the network is
28801 unavailable for purposes of recording circuit build times. If we
28802 receive no cells whatsoever for the entire duration of a circuit's
28803 full measured lifetime, the network is probably down. Also ignore
28804 one-hop directory fetching circuit timeouts when calculating our
28805 circuit build times. These changes should hopefully reduce the
28806 cases where we see ridiculous circuit build timeouts for people
28807 with spotty wireless connections. Fixes part of bug 1772; bugfix
28809 - Prevent the circuit build timeout from becoming larger than
28810 the maximum build time we have ever seen. Also, prevent the time
28811 period for measurement circuits from becoming larger than twice that
28812 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
28815 - When we run out of directory information such that we can't build
28816 circuits, but then get enough that we can build circuits, log when
28817 we actually construct a circuit, so the user has a better chance of
28818 knowing what's going on. Fixes bug 1362.
28819 - Be more generous with how much bandwidth we'd use up (with
28820 accounting enabled) before entering "soft hibernation". Previously,
28821 we'd refuse new connections and circuits once we'd used up 95% of
28822 our allotment. Now, we use up 95% of our allotment, AND make sure
28823 that we have no more than 500MB (or 3 hours of expected traffic,
28824 whichever is lower) remaining before we enter soft hibernation.
28825 - If we've configured EntryNodes and our network goes away and/or all
28826 our entrynodes get marked down, optimistically retry them all when
28827 a new socks application request appears. Fixes bug 1882.
28828 - Add some more defensive programming for architectures that can't
28829 handle unaligned integer accesses. We don't know of any actual bugs
28830 right now, but that's the best time to fix them. Fixes bug 1943.
28831 - Support line continuations in the torrc config file. If a line
28832 ends with a single backslash character, the newline is ignored, and
28833 the configuration value is treated as continuing on the next line.
28836 o Minor bugfixes (on 0.2.1.x and earlier):
28837 - For bandwidth accounting, calculate our expected bandwidth rate
28838 based on the time during which we were active and not in
28839 soft-hibernation during the last interval. Previously, we were
28840 also considering the time spent in soft-hibernation. If this
28841 was a long time, we would wind up underestimating our bandwidth
28842 by a lot, and skewing our wakeup time towards the start of the
28843 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
28845 o Minor bugfixes (on 0.2.2.x):
28846 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
28847 which were disabled by the circuit build timeout changes in
28848 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
28849 - Make sure we don't warn about missing bandwidth weights when
28850 choosing bridges or other relays not in the consensus. Bugfix on
28851 0.2.2.10-alpha; fixes bug 1805.
28852 - In our logs, do not double-report signatures from unrecognized
28853 authorities both as "from unknown authority" and "not
28854 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
28857 Changes in version 0.2.2.16-alpha - 2010-09-17
28858 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
28859 evident at exit relays), and also continues to resolve all the little
28860 bugs that have been filling up trac lately.
28862 o Major bugfixes (stream-level fairness):
28863 - When receiving a circuit-level SENDME for a blocked circuit, try
28864 to package cells fairly from all the streams that had previously
28865 been blocked on that circuit. Previously, we had started with the
28866 oldest stream, and allowed each stream to potentially exhaust
28867 the circuit's package window. This gave older streams on any
28868 given circuit priority over newer ones. Fixes bug 1937. Detected
28869 originally by Camilo Viecco. This bug was introduced before the
28870 first Tor release, in svn commit r152: it is the new winner of
28871 the longest-lived bug prize.
28872 - When the exit relay got a circuit-level sendme cell, it started
28873 reading on the exit streams, even if had 500 cells queued in the
28874 circuit queue already, so the circuit queue just grew and grew in
28875 some cases. We fix this by not re-enabling reading on receipt of a
28876 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
28877 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
28879 - Newly created streams were allowed to read cells onto circuits,
28880 even if the circuit's cell queue was blocked and waiting to drain.
28881 This created potential unfairness, as older streams would be
28882 blocked, but newer streams would gladly fill the queue completely.
28883 We add code to detect this situation and prevent any stream from
28884 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
28888 - Update to the September 1 2010 Maxmind GeoLite Country database.
28889 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
28890 not. This would lead to a cookie that is still not group readable.
28891 Closes bug 1843. Suggested by katmagic.
28892 - When logging a rate-limited warning, we now mention how many messages
28893 got suppressed since the last warning.
28894 - Add new "perconnbwrate" and "perconnbwburst" consensus params to
28895 do individual connection-level rate limiting of clients. The torrc
28896 config options with the same names trump the consensus params, if
28897 both are present. Replaces the old "bwconnrate" and "bwconnburst"
28898 consensus params which were broken from 0.2.2.7-alpha through
28899 0.2.2.14-alpha. Closes bug 1947.
28900 - When a router changes IP address or port, authorities now launch
28901 a new reachability test for it. Implements ticket 1899.
28902 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
28903 2 no signature, 4 required" messages about consensus signatures
28904 easier to read, and make sure they get logged at the same severity
28905 as the messages explaining which keys are which. Fixes bug 1290.
28906 - Don't warn when we have a consensus that we can't verify because
28907 of missing certificates, unless those certificates are ones
28908 that we have been trying and failing to download. Fixes bug 1145.
28909 - If you configure your bridge with a known identity fingerprint,
28910 and the bridge authority is unreachable (as it is in at least
28911 one country now), fall back to directly requesting the descriptor
28912 from the bridge. Finishes the feature started in 0.2.0.10-alpha;
28914 - When building with --enable-gcc-warnings on OpenBSD, disable
28915 warnings in system headers. This makes --enable-gcc-warnings
28916 pass on OpenBSD 4.8.
28918 o Minor bugfixes (on 0.2.1.x and earlier):
28919 - Authorities will now attempt to download consensuses if their
28920 own efforts to make a live consensus have failed. This change
28921 means authorities that restart will fetch a valid consensus, and
28922 it means authorities that didn't agree with the current consensus
28923 will still fetch and serve it if it has enough signatures. Bugfix
28924 on 0.2.0.9-alpha; fixes bug 1300.
28925 - Ensure DNS requests launched by "RESOLVE" commands from the
28926 controller respect the __LeaveStreamsUnattached setconf options. The
28927 same goes for requests launched via DNSPort or transparent
28928 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
28929 - Allow handshaking OR connections to take a full KeepalivePeriod
28930 seconds to handshake. Previously, we would close them after
28931 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
28932 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
28934 - Rate-limit "Failed to hand off onionskin" warnings.
28935 - Never relay a cell for a circuit we have already destroyed.
28936 Between marking a circuit as closeable and finally closing it,
28937 it may have been possible for a few queued cells to get relayed,
28938 even though they would have been immediately dropped by the next
28939 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
28940 - Never queue a cell for a circuit that's already been marked
28942 - Never vote for a server as "Running" if we have a descriptor for
28943 it claiming to be hibernating, and that descriptor was published
28944 more recently than our last contact with the server. Bugfix on
28945 0.2.0.3-alpha; fixes bug 911.
28946 - Squash a compile warning on OpenBSD. Reported by Tas; fixes
28949 o Minor bugfixes (on 0.2.2.x):
28950 - Fix a regression introduced in 0.2.2.7-alpha that marked relays
28951 down if a directory fetch fails and you've configured either
28952 bridges or EntryNodes. The intent was to mark the relay as down
28953 _unless_ you're using bridges or EntryNodes, since if you are
28954 then you could quickly run out of entry points.
28955 - Fix the Windows directory-listing code. A bug introduced in
28956 0.2.2.14-alpha could make Windows directory servers forget to load
28957 some of their cached v2 networkstatus files.
28958 - Really allow clients to use relays as bridges. Fixes bug 1776;
28959 bugfix on 0.2.2.15-alpha.
28960 - Demote a warn to info that happens when the CellStatistics option
28961 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
28962 Reported by Moritz Bartl.
28963 - On Windows, build correctly either with or without Unicode support.
28964 This is necessary so that Tor can support fringe platforms like
28965 Windows 98 (which has no Unicode), or Windows CE (which has no
28966 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
28969 - Add a unit test for cross-platform directory-listing code.
28972 Changes in version 0.2.2.15-alpha - 2010-08-18
28973 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
28974 fixes a variety of other bugs that were preventing performance
28975 experiments from moving forward, fixes several bothersome memory leaks,
28976 and generally closes a lot of smaller bugs that have been filling up
28980 - Stop assigning the HSDir flag to relays that disable their
28981 DirPort (and thus will refuse to answer directory requests). This
28982 fix should dramatically improve the reachability of hidden services:
28983 hidden services and hidden service clients pick six HSDir relays
28984 to store and retrieve the hidden service descriptor, and currently
28985 about half of the HSDir relays will refuse to work. Bugfix on
28986 0.2.0.10-alpha; fixes part of bug 1693.
28987 - The PerConnBWRate and Burst config options, along with the
28988 bwconnrate and bwconnburst consensus params, initialized each conn's
28989 token bucket values only when the connection is established. Now we
28990 update them if the config options change, and update them every time
28991 we get a new consensus. Otherwise we can encounter an ugly edge
28992 case where we initialize an OR conn to client-level bandwidth,
28993 but then later the relay joins the consensus and we leave it
28994 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
28995 - Fix a regression that caused Tor to rebind its ports if it receives
28996 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
28999 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
29000 should give us approximately 40-50% more Guard-flagged nodes,
29001 improving the anonymity the Tor network can provide and also
29002 decreasing the dropoff in throughput that relays experience when
29003 they first get the Guard flag.
29004 - Allow enabling or disabling the *Statistics config options while
29008 - Update to the August 1 2010 Maxmind GeoLite Country database.
29009 - Have the controller interface give a more useful message than
29010 "Internal Error" in response to failed GETINFO requests.
29011 - Warn when the same option is provided more than once in a torrc
29012 file, on the command line, or in a single SETCONF statement, and
29013 the option is one that only accepts a single line. Closes bug 1384.
29014 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
29015 Patch from mingw-san.
29016 - Add support for the country code "{??}" in torrc options like
29017 ExcludeNodes, to indicate all routers of unknown country. Closes
29019 - Relays report the number of bytes spent on answering directory
29020 requests in extra-info descriptors similar to {read,write}-history.
29021 Implements enhancement 1790.
29023 o Minor bugfixes (on 0.2.1.x and earlier):
29024 - Complain if PublishServerDescriptor is given multiple arguments that
29025 include 0 or 1. This configuration will be rejected in the future.
29026 Bugfix on 0.2.0.1-alpha; closes bug 1107.
29027 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
29028 Bugfix on 0.2.0.13-alpha; closes bug 928.
29029 - Change "Application request when we're believed to be offline."
29030 notice to "Application request when we haven't used client
29031 functionality lately.", to clarify that it's not an error. Bugfix
29032 on 0.0.9.3; fixes bug 1222.
29033 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
29034 would return "551 Internal error" rather than "552 Unrecognized key
29035 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
29036 - Users can't configure a regular relay to be their bridge. It didn't
29037 work because when Tor fetched the bridge descriptor, it found
29038 that it already had it, and didn't realize that the purpose of the
29039 descriptor had changed. Now we replace routers with a purpose other
29040 than bridge with bridge descriptors when fetching them. Bugfix on
29041 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
29042 refetch the descriptor with router purpose 'general', disabling
29044 - Fix a rare bug in rend_fn unit tests: we would fail a test when
29045 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
29046 on 0.2.0.10-alpha; fixes bug 1808.
29047 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
29048 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
29049 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
29050 Servers can start sending this code when enough clients recognize
29051 it. Also update the spec to reflect this new reason. Bugfix on
29052 0.1.0.1-rc; fixes part of bug 1793.
29053 - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
29054 when we switch from being a public relay to a bridge. Otherwise
29055 there will still be clients that see the relay in their consensus,
29056 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
29058 - Instead of giving an assertion failure on an internal mismatch
29059 on estimated freelist size, just log a BUG warning and try later.
29060 Mitigates but does not fix bug 1125.
29061 - Fix an assertion failure that could occur in caches or bridge users
29062 when using a very short voting interval on a testing network.
29063 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
29065 o Minor bugfixes (on 0.2.2.x):
29066 - Alter directory authorities to always consider Exit-flagged nodes
29067 as potential Guard nodes in their votes. The actual decision to
29068 use Exits as Guards is done in the consensus bandwidth weights.
29069 Fixes bug 1294; bugfix on 0.2.2.10-alpha.
29070 - When the controller is reporting the purpose of circuits that
29071 didn't finish building before the circuit build timeout, it was
29072 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
29073 - Our libevent version parsing code couldn't handle versions like
29074 1.4.14b-stable and incorrectly warned the user about using an
29075 old and broken version of libevent. Treat 1.4.14b-stable like
29076 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
29078 - Don't use substitution references like $(VAR:MOD) when
29079 $(asciidoc_files) is empty -- make(1) on NetBSD transforms
29080 '$(:x)' to 'x' rather than the empty string. This bites us in
29081 doc/ when configured with --disable-asciidoc. Bugfix on
29082 0.2.2.9-alpha; fixes bug 1773.
29083 - Remove a spurious hidden service server-side log notice about
29084 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
29086 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
29088 - Correctly report written bytes on linked connections. Found while
29089 implementing 1790. Bugfix on 0.2.2.4-alpha.
29090 - Fix three memory leaks: one in circuit_build_times_parse_state(),
29091 one in dirvote_add_signatures_to_pending_consensus(), and one every
29092 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
29093 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
29095 o Code simplifications and refactoring:
29096 - Take a first step towards making or.h smaller by splitting out
29097 function definitions for all source files in src/or/. Leave
29098 structures and defines in or.h for now.
29099 - Remove a bunch of unused function declarations as well as a block of
29100 #if 0'd code from the unit tests. Closes bug 1824.
29101 - New unit tests for exit-port history statistics; refactored exit
29102 statistics code to be more easily tested.
29103 - Remove the old debian/ directory from the main Tor distribution.
29104 The official Tor-for-debian git repository lives at the URL
29105 https://git.torproject.org/debian/tor.git
29108 Changes in version 0.2.2.14-alpha - 2010-07-12
29109 Tor 0.2.2.14-alpha greatly improves client-side handling of
29110 circuit build timeouts, which are used to estimate speed and improve
29111 performance. We also move to a much better GeoIP database, port Tor to
29112 Windows CE, introduce new compile flags that improve code security,
29113 add an eighth v3 directory authority, and address a lot of more
29117 - Tor directory authorities no longer crash when started with a
29118 cached-microdesc-consensus file in their data directory. Bugfix
29119 on 0.2.2.6-alpha; fixes bug 1532.
29120 - Treat an unset $HOME like an empty $HOME rather than triggering an
29121 assert. Bugfix on 0.0.8pre1; fixes bug 1522.
29122 - Ignore negative and large circuit build timeout values that can
29123 happen during a suspend or hibernate. These values caused various
29124 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
29125 - Alter calculation of Pareto distribution parameter 'Xm' for
29126 Circuit Build Timeout learning to use the weighted average of the
29127 top N=3 modes (because we have three entry guards). Considering
29128 multiple modes should improve the timeout calculation in some cases,
29129 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
29131 - Alter calculation of Pareto distribution parameter 'Alpha' to use a
29132 right censored distribution model. This approach improves over the
29133 synthetic timeout generation approach that was producing insanely
29134 high timeout values. Now we calculate build timeouts using truncated
29135 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
29136 - Do not close circuits that are under construction when they reach
29137 the circuit build timeout. Instead, leave them building (but do not
29138 use them) for up until the time corresponding to the 95th percentile
29139 on the Pareto CDF or 60 seconds, whichever is greater. This is done
29140 to provide better data for the new Pareto model. This percentile
29141 can be controlled by the consensus.
29144 - Move to the June 2010 Maxmind GeoLite country db (rather than the
29145 June 2009 ip-to-country GeoIP db) for our statistics that count
29146 how many users relays are seeing from each country. Now we have
29147 more accurate data for many African countries.
29148 - Port Tor to build and run correctly on Windows CE systems, using
29149 the wcecompat library. Contributed by Valerio Lupi.
29150 - New "--enable-gcc-hardening" ./configure flag (off by default)
29151 to turn on gcc compile time hardening options. It ensures
29152 that signed ints have defined behavior (-fwrapv), enables
29153 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
29154 with canaries (-fstack-protector-all), turns on ASLR protection if
29155 supported by the kernel (-fPIE, -pie), and adds additional security
29156 related warnings. Verified to work on Mac OS X and Debian Lenny.
29157 - New "--enable-linker-hardening" ./configure flag (off by default)
29158 to turn on ELF specific hardening features (relro, now). This does
29159 not work with Mac OS X or any other non-ELF binary format.
29161 o New directory authorities:
29162 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
29166 - New config option "WarnUnsafeSocks 0" disables the warning that
29167 occurs whenever Tor receives a socks handshake using a version of
29168 the socks protocol that can only provide an IP address (rather
29169 than a hostname). Setups that do DNS locally over Tor are fine,
29170 and we shouldn't spam the logs in that case.
29171 - Convert the HACKING file to asciidoc, and add a few new sections
29172 to it, explaining how we use Git, how we make changelogs, and
29173 what should go in a patch.
29174 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
29175 event, to give information on the current rate of circuit timeouts
29176 over our stored history.
29177 - Add ability to disable circuit build time learning via consensus
29178 parameter and via a LearnCircuitBuildTimeout config option. Also
29179 automatically disable circuit build time calculation if we are
29180 either a AuthoritativeDirectory, or if we fail to write our state
29181 file. Fixes bug 1296.
29182 - More gracefully handle corrupt state files, removing asserts
29183 in favor of saving a backup and resetting state.
29184 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
29188 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
29190 - When a2x fails, mention that the user could disable manpages instead
29191 of trying to fix their asciidoc installation.
29192 - Where available, use Libevent 2.0's periodic timers so that our
29193 once-per-second cleanup code gets called even more closely to
29194 once per second than it would otherwise. Fixes bug 943.
29195 - If you run a bridge that listens on multiple IP addresses, and
29196 some user configures a bridge address that uses a different IP
29197 address than your bridge writes in its router descriptor, and the
29198 user doesn't specify an identity key, their Tor would discard the
29199 descriptor because "it isn't one of our configured bridges", and
29200 fail to bootstrap. Now believe the descriptor and bootstrap anyway.
29201 Bugfix on 0.2.0.3-alpha.
29202 - If OpenSSL fails to make a duplicate of a private or public key, log
29203 an error message and try to exit cleanly. May help with debugging
29204 if bug 1209 ever remanifests.
29205 - Save a couple bytes in memory allocation every time we escape
29206 certain characters in a string. Patch from Florian Zumbiehl.
29207 - Make it explicit that we don't cannibalize one-hop circuits. This
29208 happens in the wild, but doesn't turn out to be a problem because
29209 we fortunately don't use those circuits. Many thanks to outofwords
29210 for the initial analysis and to swissknife who confirmed that
29211 two-hop circuits are actually created.
29212 - Make directory mirrors report non-zero dirreq-v[23]-shares again.
29213 Fixes bug 1564; bugfix on 0.2.2.9-alpha.
29214 - Eliminate a case where a circuit build time warning was displayed
29215 after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
29218 Changes in version 0.2.1.26 - 2010-05-02
29219 Tor 0.2.1.26 addresses the recent connection and memory overload
29220 problems we've been seeing on relays, especially relays with their
29221 DirPort open. If your relay has been crashing, or you turned it off
29222 because it used too many resources, give this release a try.
29224 This release also fixes yet another instance of broken OpenSSL libraries
29225 that was causing some relays to drop out of the consensus.
29228 - Teach relays to defend themselves from connection overload. Relays
29229 now close idle circuits early if it looks like they were intended
29230 for directory fetches. Relays are also more aggressive about closing
29231 TLS connections that have no circuits on them. Such circuits are
29232 unlikely to be re-used, and tens of thousands of them were piling
29233 up at the fast relays, causing the relays to run out of sockets
29234 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
29235 their directory fetches over TLS).
29236 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
29237 that claim to be earlier than 0.9.8m, but which have in reality
29238 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
29239 behavior. Possible fix for some cases of bug 1346.
29240 - Directory mirrors were fetching relay descriptors only from v2
29241 directory authorities, rather than v3 authorities like they should.
29242 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
29243 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
29246 - Finally get rid of the deprecated and now harmful notion of "clique
29247 mode", where directory authorities maintain TLS connections to
29251 - In the util/threads test, no longer free the test_mutex before all
29252 worker threads have finished. Bugfix on 0.2.1.6-alpha.
29253 - The master thread could starve the worker threads quite badly on
29254 certain systems, causing them to run only partially in the allowed
29255 window. This resulted in test failures. Now the master thread sleeps
29256 occasionally for a few microseconds while the two worker-threads
29257 compete for the mutex. Bugfix on 0.2.0.1-alpha.
29260 Changes in version 0.2.2.13-alpha - 2010-04-24
29261 Tor 0.2.2.13-alpha addresses the recent connection and memory overload
29262 problems we've been seeing on relays, especially relays with their
29263 DirPort open. If your relay has been crashing, or you turned it off
29264 because it used too many resources, give this release a try.
29267 - Teach relays to defend themselves from connection overload. Relays
29268 now close idle circuits early if it looks like they were intended
29269 for directory fetches. Relays are also more aggressive about closing
29270 TLS connections that have no circuits on them. Such circuits are
29271 unlikely to be re-used, and tens of thousands of them were piling
29272 up at the fast relays, causing the relays to run out of sockets
29273 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
29274 their directory fetches over TLS).
29277 - Finally get rid of the deprecated and now harmful notion of "clique
29278 mode", where directory authorities maintain TLS connections to
29280 - Directory authorities now do an immediate reachability check as soon
29281 as they hear about a new relay. This change should slightly reduce
29282 the time between setting up a relay and getting listed as running
29283 in the consensus. It should also improve the time between setting
29284 up a bridge and seeing use by bridge users.
29285 - Directory authorities no longer launch a TLS connection to every
29286 relay as they startup. Now that we have 2k+ descriptors cached,
29287 the resulting network hiccup is becoming a burden. Besides,
29288 authorities already avoid voting about Running for the first half
29289 hour of their uptime.
29292 Changes in version 0.2.2.12-alpha - 2010-04-20
29293 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
29294 handle and vote on descriptors. It was causing relays to drop out of
29298 - Many relays have been falling out of the consensus lately because
29299 not enough authorities know about their descriptor for them to get
29300 a majority of votes. When we deprecated the v2 directory protocol,
29301 we got rid of the only way that v3 authorities can hear from each
29302 other about other descriptors. Now authorities examine every v3
29303 vote for new descriptors, and fetch them from that authority. Bugfix
29305 - Fix two typos in tor_vasprintf() that broke the compile on Windows,
29306 and a warning in or.h related to bandwidth_weight_rule_t that
29307 prevented clean compile on OS X. Fixes bug 1363; bugfix on
29309 - Fix a segfault on relays when DirReqStatistics is enabled
29310 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
29314 - Demote a confusing TLS warning that relay operators might get when
29315 someone tries to talk to their OrPort. It is neither the operator's
29316 fault nor can they do anything about it. Fixes bug 1364; bugfix
29320 Changes in version 0.2.2.11-alpha - 2010-04-15
29321 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
29322 libraries that was causing some relays to drop out of the consensus.
29325 - Directory mirrors were fetching relay descriptors only from v2
29326 directory authorities, rather than v3 authorities like they should.
29327 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
29328 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
29329 - Fix a parsing error that made every possible value of
29330 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
29331 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
29332 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
29333 about the option without breaking older ones.
29334 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
29335 that claim to be earlier than 0.9.8m, but which have in reality
29336 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
29337 behavior. Possible fix for some cases of bug 1346.
29340 - Experiment with a more aggressive approach to preventing clients
29341 from making one-hop exit streams. Exit relays who want to try it
29342 out can set "RefuseUnknownExits 1" in their torrc, and then look
29343 for "Attempt by %s to open a stream" log messages. Let us know
29345 - Add support for statically linking zlib by specifying
29346 --enable-static-zlib, to go with our support for statically linking
29347 openssl and libevent. Resolves bug 1358.
29350 - Fix a segfault that happens whenever a Tor client that is using
29351 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
29353 - When we cleaned up the contrib/tor-exit-notice.html file, we left
29354 out the first line. Fixes bug 1295.
29355 - When building the manpage from a tarball, we required asciidoc, but
29356 the asciidoc -> roff/html conversion was already done for the
29357 tarball. Make 'make' complain only when we need asciidoc (either
29358 because we're compiling directly from git, or because we altered
29359 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
29360 - When none of the directory authorities vote on any params, Tor
29361 segfaulted when trying to make the consensus from the votes. We
29362 didn't trigger the bug in practice, because authorities do include
29363 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
29366 - In the util/threads test, no longer free the test_mutex before all
29367 worker threads have finished. Bugfix on 0.2.1.6-alpha.
29368 - The master thread could starve the worker threads quite badly on
29369 certain systems, causing them to run only partially in the allowed
29370 window. This resulted in test failures. Now the master thread sleeps
29371 occasionally for a few microseconds while the two worker-threads
29372 compete for the mutex. Bugfix on 0.2.0.1-alpha.
29375 Changes in version 0.2.2.10-alpha - 2010-03-07
29376 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
29377 could prevent relays from guessing their IP address correctly. It also
29378 starts the groundwork for another client-side performance boost, since
29379 currently we're not making efficient use of relays that have both the
29380 Guard flag and the Exit flag.
29383 - Fix a regression from our patch for bug 1244 that caused relays
29384 to guess their IP address incorrectly if they didn't set Address
29385 in their torrc and/or their address fails to resolve. Bugfix on
29386 0.2.2.9-alpha; fixes bug 1269.
29388 o Major features (performance):
29389 - Directory authorities now compute consensus weightings that instruct
29390 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
29391 and no flag. Clients that use these weightings will distribute
29392 network load more evenly across these different relay types. The
29393 weightings are in the consensus so we can change them globally in
29394 the future. Extra thanks to "outofwords" for finding some nasty
29395 security bugs in the first implementation of this feature.
29397 o Minor features (performance):
29398 - Always perform router selections using weighted relay bandwidth,
29399 even if we don't need a high capacity circuit at the time. Non-fast
29400 circuits now only differ from fast ones in that they can use relays
29401 not marked with the Fast flag. This "feature" could turn out to
29402 be a horrible bug; we should investigate more before it goes into
29406 - Allow disabling building of the manpages. Skipping the manpage
29407 speeds up the build considerably.
29409 o Minor bugfixes (on 0.2.2.x):
29410 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
29411 Bugfix on 0.2.2.9-alpha.
29412 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
29413 config option. Bugfix on 0.2.2.7-alpha.
29414 - Ship the asciidoc-helper file in the tarball, so that people can
29415 build from source if they want to, and touching the .1.txt files
29416 doesn't break the build. Bugfix on 0.2.2.9-alpha.
29418 o Minor bugfixes (on 0.2.1.x or earlier):
29419 - Fix a dereference-then-NULL-check sequence when publishing
29420 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
29422 - Fix another dereference-then-NULL-check sequence. Bugfix on
29423 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
29424 - Make sure we treat potentially not NUL-terminated strings correctly.
29425 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
29427 o Code simplifications and refactoring:
29428 - Fix some urls in the exit notice file and make it XHTML1.1 strict
29429 compliant. Based on a patch from Christian Kujau.
29430 - Don't use sed in asciidoc-helper anymore.
29431 - Make the build process fail if asciidoc cannot be found and
29432 building with asciidoc isn't disabled.
29435 Changes in version 0.2.2.9-alpha - 2010-02-22
29436 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
29437 location of a directory authority, and cleans up a bunch of small bugs.
29439 o Directory authority changes:
29440 - Change IP address for dannenberg (v3 directory authority), and
29441 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
29442 service directory authority) from the list.
29445 - Make Tor work again on the latest OS X: when deciding whether to
29446 use strange flags to turn TLS renegotiation on, detect the OpenSSL
29447 version at run-time, not compile time. We need to do this because
29448 Apple doesn't update its dev-tools headers when it updates its
29449 libraries in a security patch.
29450 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
29451 that could happen on 32-bit platforms with 64-bit time_t. Also fix
29452 a memory leak when requesting a hidden service descriptor we've
29453 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
29455 - Authorities could be tricked into giving out the Exit flag to relays
29456 that didn't allow exiting to any ports. This bug could screw
29457 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
29458 1238. Bug discovered by Martin Kowalczyk.
29459 - When freeing a session key, zero it out completely. We only zeroed
29460 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
29461 patched by ekir. Fixes bug 1254.
29464 - Fix static compilation by listing the openssl libraries in the right
29465 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
29466 - Resume handling .exit hostnames in a special way: originally we
29467 stripped the .exit part and used the requested exit relay. In
29468 0.2.2.1-alpha we stopped treating them in any special way, meaning
29469 if you use a .exit address then Tor will pass it on to the exit
29470 relay. Now we reject the .exit stream outright, since that behavior
29471 might be more expected by the user. Found and diagnosed by Scott
29472 Bennett and Downie on or-talk.
29473 - Don't spam the controller with events when we have no file
29474 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
29475 for log messages was already solved from bug 748.)
29476 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
29478 - Make the DNSPort option work with libevent 2.x. Don't alter the
29479 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
29480 - Emit a GUARD DROPPED controller event for a case we missed.
29481 - Make more fields in the controller protocol case-insensitive, since
29482 control-spec.txt said they were.
29483 - Refactor resolve_my_address() to not use gethostbyname() anymore.
29484 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
29485 - Fix a spec conformance issue: the network-status-version token
29486 must be the first token in a v3 consensus or vote. Discovered by
29487 parakeep. Bugfix on 0.2.0.3-alpha.
29489 o Code simplifications and refactoring:
29490 - Generate our manpage and HTML documentation using Asciidoc. This
29491 change should make it easier to maintain the documentation, and
29492 produce nicer HTML.
29493 - Remove the --enable-iphone option. According to reports from Marco
29494 Bonetti, Tor builds fine without any special tweaking on recent
29495 iPhone SDK versions.
29496 - Removed some unnecessary files from the source distribution. The
29497 AUTHORS file has now been merged into the people page on the
29498 website. The roadmaps and design doc can now be found in the
29499 projects directory in svn.
29500 - Enabled various circuit build timeout constants to be controlled
29501 by consensus parameters. Also set better defaults for these
29502 parameters based on experimentation on broadband and simulated
29503 high latency links.
29506 - The 'EXTENDCIRCUIT' control port command can now be used with
29507 a circ id of 0 and no path. This feature will cause Tor to build
29508 a new 'fast' general purpose circuit using its own path selection
29510 - Added a BUILDTIMEOUT_SET controller event to describe changes
29511 to the circuit build timeout.
29512 - Future-proof the controller protocol a bit by ignoring keyword
29513 arguments we do not recognize.
29514 - Expand homedirs passed to tor-checkkey. This should silence a
29515 coverity complaint about passing a user-supplied string into
29516 open() without checking it.
29519 Changes in version 0.2.1.25 - 2010-03-16
29520 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
29521 prevent relays from guessing their IP address correctly. It also fixes
29522 several minor potential security bugs.
29525 - Fix a regression from our patch for bug 1244 that caused relays
29526 to guess their IP address incorrectly if they didn't set Address
29527 in their torrc and/or their address fails to resolve. Bugfix on
29528 0.2.1.23; fixes bug 1269.
29529 - When freeing a session key, zero it out completely. We only zeroed
29530 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
29531 patched by ekir. Fixes bug 1254.
29534 - Fix a dereference-then-NULL-check sequence when publishing
29535 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
29537 - Fix another dereference-then-NULL-check sequence. Bugfix on
29538 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
29539 - Make sure we treat potentially not NUL-terminated strings correctly.
29540 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
29544 Changes in version 0.2.1.24 - 2010-02-21
29545 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
29549 - Work correctly out-of-the-box with even more vendor-patched versions
29550 of OpenSSL. In particular, make it so Debian and OS X don't need
29551 customized patches to run/build.
29554 Changes in version 0.2.1.23 - 2010-02-13
29555 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
29556 again on the latest OS X, and updates the location of a directory
29559 o Major bugfixes (performance):
29560 - We were selecting our guards uniformly at random, and then weighting
29561 which of our guards we'd use uniformly at random. This imbalance
29562 meant that Tor clients were severely limited on throughput (and
29563 probably latency too) by the first hop in their circuit. Now we
29564 select guards weighted by currently advertised bandwidth. We also
29565 automatically discard guards picked using the old algorithm. Fixes
29566 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
29569 - Make Tor work again on the latest OS X: when deciding whether to
29570 use strange flags to turn TLS renegotiation on, detect the OpenSSL
29571 version at run-time, not compile time. We need to do this because
29572 Apple doesn't update its dev-tools headers when it updates its
29573 libraries in a security patch.
29574 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
29575 that could happen on 32-bit platforms with 64-bit time_t. Also fix
29576 a memory leak when requesting a hidden service descriptor we've
29577 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
29580 o Directory authority changes:
29581 - Change IP address for dannenberg (v3 directory authority), and
29582 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
29583 service directory authority) from the list.
29586 - Refactor resolve_my_address() to not use gethostbyname() anymore.
29587 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
29590 - Avoid a mad rush at the beginning of each month when each client
29591 rotates half of its guards. Instead we spread the rotation out
29592 throughout the month, but we still avoid leaving a precise timestamp
29593 in the state file about when we first picked the guard. Improves
29594 over the behavior introduced in 0.1.2.17.
29597 Changes in version 0.2.2.8-alpha - 2010-01-26
29598 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
29599 causing bridge relays to disappear. If you're running a bridge,
29603 - Fix a memory corruption bug on bridges that occurred during the
29604 inclusion of stats data in extra-info descriptors. Also fix the
29605 interface for geoip_get_bridge_stats* to prevent similar bugs in
29606 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
29607 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
29610 - Ignore OutboundBindAddress when connecting to localhost.
29611 Connections to localhost need to come _from_ localhost, or else
29612 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
29616 Changes in version 0.2.2.7-alpha - 2010-01-19
29617 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
29618 as laying the groundwork for further relay-side performance fixes. It
29619 also starts cleaning up client behavior with respect to the EntryNodes,
29620 ExitNodes, and StrictNodes config options.
29622 This release also rotates two directory authority keys, due to a
29623 security breach of some of the Torproject servers.
29625 o Directory authority changes:
29626 - Rotate keys (both v3 identity and relay identity) for moria1
29629 o Major features (performance):
29630 - We were selecting our guards uniformly at random, and then weighting
29631 which of our guards we'd use uniformly at random. This imbalance
29632 meant that Tor clients were severely limited on throughput (and
29633 probably latency too) by the first hop in their circuit. Now we
29634 select guards weighted by currently advertised bandwidth. We also
29635 automatically discard guards picked using the old algorithm. Fixes
29636 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
29637 - When choosing which cells to relay first, relays can now favor
29638 circuits that have been quiet recently, to provide lower latency
29639 for low-volume circuits. By default, relays enable or disable this
29640 feature based on a setting in the consensus. You can override
29641 this default by using the new "CircuitPriorityHalflife" config
29642 option. Design and code by Ian Goldberg, Can Tang, and Chris
29644 - Add separate per-conn write limiting to go with the per-conn read
29645 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
29646 but never per-conn write limits.
29647 - New consensus params "bwconnrate" and "bwconnburst" to let us
29648 rate-limit client connections as they enter the network. It's
29649 controlled in the consensus so we can turn it on and off for
29650 experiments. It's starting out off. Based on proposal 163.
29652 o Major features (relay selection options):
29653 - Switch to a StrictNodes config option, rather than the previous
29654 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
29655 "StrictExcludeNodes" option.
29656 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
29657 change during a config reload, mark and discard all our origin
29658 circuits. This fix should address edge cases where we change the
29659 config options and but then choose a circuit that we created before
29661 - If EntryNodes or ExitNodes are set, be more willing to use an
29662 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
29664 - Make EntryNodes config option much more aggressive even when
29665 StrictNodes is not set. Before it would prepend your requested
29666 entrynodes to your list of guard nodes, but feel free to use others
29667 after that. Now it chooses only from your EntryNodes if any of
29668 those are available, and only falls back to others if a) they're
29669 all down and b) StrictNodes is not set.
29670 - Now we refresh your entry guards from EntryNodes at each consensus
29671 fetch -- rather than just at startup and then they slowly rot as
29672 the network changes.
29675 - Stop bridge directory authorities from answering dbg-stability.txt
29676 directory queries, which would let people fetch a list of all
29677 bridge identities they track. Bugfix on 0.2.1.6-alpha.
29680 - Log a notice when we get a new control connection. Now it's easier
29681 for security-conscious users to recognize when a local application
29682 is knocking on their controller door. Suggested by bug 1196.
29683 - New config option "CircuitStreamTimeout" to override our internal
29684 timeout schedule for how many seconds until we detach a stream from
29685 a circuit and try a new circuit. If your network is particularly
29686 slow, you might want to set this to a number like 60.
29687 - New controller command "getinfo config-text". It returns the
29688 contents that Tor would write if you send it a SAVECONF command,
29689 so the controller can write the file to disk itself.
29690 - New options for SafeLogging to allow scrubbing only log messages
29691 generated while acting as a relay.
29692 - Ship the bridges spec file in the tarball too.
29693 - Avoid a mad rush at the beginning of each month when each client
29694 rotates half of its guards. Instead we spread the rotation out
29695 throughout the month, but we still avoid leaving a precise timestamp
29696 in the state file about when we first picked the guard. Improves
29697 over the behavior introduced in 0.1.2.17.
29699 o Minor bugfixes (compiling):
29700 - Fix compilation on OS X 10.3, which has a stub mlockall() but
29701 hides it. Bugfix on 0.2.2.6-alpha.
29702 - Fix compilation on Solaris by removing support for the
29703 DisableAllSwap config option. Solaris doesn't have an rlimit for
29704 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
29707 o Minor bugfixes (crashes):
29708 - Do not segfault when writing buffer stats when we haven't observed
29709 a single circuit to report about. Found by Fabian Lanze. Bugfix on
29711 - If we're in the pathological case where there's no exit bandwidth
29712 but there is non-exit bandwidth, or no guard bandwidth but there
29713 is non-guard bandwidth, don't crash during path selection. Bugfix
29715 - Fix an impossible-to-actually-trigger buffer overflow in relay
29716 descriptor generation. Bugfix on 0.1.0.15.
29718 o Minor bugfixes (privacy):
29719 - Fix an instance where a Tor directory mirror might accidentally
29720 log the IP address of a misbehaving Tor client. Bugfix on
29722 - Don't list Windows capabilities in relay descriptors. We never made
29723 use of them, and maybe it's a bad idea to publish them. Bugfix
29726 o Minor bugfixes (other):
29727 - Resolve an edge case in path weighting that could make us misweight
29728 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
29729 - Fix statistics on client numbers by country as seen by bridges that
29730 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
29731 intervals instead of variable 12-to-48-hour intervals.
29732 - After we free an internal connection structure, overwrite it
29733 with a different memory value than we use for overwriting a freed
29734 internal circuit structure. Should help with debugging. Suggested
29736 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
29739 o Removed features:
29740 - Remove the HSAuthorityRecordStats option that version 0 hidden
29741 service authorities could have used to track statistics of overall
29742 hidden service usage.
29745 Changes in version 0.2.1.22 - 2010-01-19
29746 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
29747 authorities -- it would tell you its whole history of bridge descriptors
29748 if you make the right directory request. This stable update also
29749 rotates two of the seven v3 directory authority keys and locations.
29751 o Directory authority changes:
29752 - Rotate keys (both v3 identity and relay identity) for moria1
29756 - Stop bridge directory authorities from answering dbg-stability.txt
29757 directory queries, which would let people fetch a list of all
29758 bridge identities they track. Bugfix on 0.2.1.6-alpha.
29761 Changes in version 0.2.1.21 - 2009-12-21
29762 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
29763 library. If you use Tor on Linux / Unix and you're getting SSL
29764 renegotiation errors, upgrading should help. We also recommend an
29765 upgrade if you're an exit relay.
29768 - Work around a security feature in OpenSSL 0.9.8l that prevents our
29769 handshake from working unless we explicitly tell OpenSSL that we
29770 are using SSL renegotiation safely. We are, of course, but OpenSSL
29771 0.9.8l won't work unless we say we are.
29772 - Avoid crashing if the client is trying to upload many bytes and the
29773 circuit gets torn down at the same time, or if the flip side
29774 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
29777 - Do not refuse to learn about authority certs and v2 networkstatus
29778 documents that are older than the latest consensus. This bug might
29779 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
29780 Spotted and fixed by xmux.
29781 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
29782 trigger platform-specific option misparsing case found by Coverity
29784 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
29785 trigger assert. Fixes bug 1173.
29788 Changes in version 0.2.2.6-alpha - 2009-11-19
29789 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
29790 support for the new lower-footprint "microdescriptor" directory design,
29791 future-proofing our consensus format against new hash functions or
29792 other changes, and an Android port. It also makes Tor compatible with
29793 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
29796 - Directory authorities can now create, vote on, and serve multiple
29797 parallel formats of directory data as part of their voting process.
29798 Partially implements Proposal 162: "Publish the consensus in
29800 - Directory authorities can now agree on and publish small summaries
29801 of router information that clients can use in place of regular
29802 server descriptors. This transition will eventually allow clients
29803 to use far less bandwidth for downloading information about the
29804 network. Begins the implementation of Proposal 158: "Clients
29805 download consensus + microdescriptors".
29806 - The directory voting system is now extensible to use multiple hash
29807 algorithms for signatures and resource selection. Newer formats
29808 are signed with SHA256, with a possibility for moving to a better
29809 hash algorithm in the future.
29810 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
29811 current and future memory pages via mlockall(). On supported
29812 platforms (modern Linux and probably BSD but not Windows or OS X),
29813 this should effectively disable any and all attempts to page out
29814 memory. This option requires that you start your Tor as root --
29815 if you use DisableAllSwap, please consider using the User option
29816 to properly reduce the privileges of your Tor.
29817 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
29818 to help Tor build correctly for Android phones.
29821 - Work around a security feature in OpenSSL 0.9.8l that prevents our
29822 handshake from working unless we explicitly tell OpenSSL that we
29823 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
29824 won't work unless we say we are.
29827 - Fix a crash bug when trying to initialize the evdns module in
29828 Libevent 2. Bugfix on 0.2.1.16-rc.
29829 - Stop logging at severity 'warn' when some other Tor client tries
29830 to establish a circuit with us using weak DH keys. It's a protocol
29831 violation, but that doesn't mean ordinary users need to hear about
29832 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
29833 - Do not refuse to learn about authority certs and v2 networkstatus
29834 documents that are older than the latest consensus. This bug might
29835 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
29836 Spotted and fixed by xmux.
29837 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
29838 - If all authorities restart at once right before a consensus vote,
29839 nobody will vote about "Running", and clients will get a consensus
29840 with no usable relays. Instead, authorities refuse to build a
29841 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
29842 - If your relay can't keep up with the number of incoming create
29843 cells, it would log one warning per failure into your logs. Limit
29844 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
29845 - Bridges now use "reject *:*" as their default exit policy. Bugfix
29846 on 0.2.0.3-alpha; fixes bug 1113.
29847 - Fix a memory leak on directory authorities during voting that was
29848 introduced in 0.2.2.1-alpha. Found via valgrind.
29851 Changes in version 0.2.1.20 - 2009-10-15
29852 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
29853 services at once, prepares for more performance improvements, and
29854 fixes a bunch of smaller bugs.
29856 The Windows and OS X bundles also include a more recent Vidalia,
29857 and switch from Privoxy to Polipo.
29859 The OS X installers are now drag and drop. It's best to un-install
29860 Tor/Vidalia and then install this new bundle, rather than upgrade. If
29861 you want to upgrade, you'll need to update the paths for Tor and Polipo
29862 in the Vidalia Settings window.
29865 - Send circuit or stream sendme cells when our window has decreased
29866 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
29867 by Karsten when testing the "reduce circuit window" performance
29868 patch. Bugfix on the 54th commit on Tor -- from July 2002,
29869 before the release of Tor 0.0.0. This is the new winner of the
29871 - Fix a remotely triggerable memory leak when a consensus document
29872 contains more than one signature from the same voter. Bugfix on
29874 - Avoid segfault in rare cases when finishing an introduction circuit
29875 as a client and finding out that we don't have an introduction key
29876 for it. Fixes bug 1073. Reported by Aaron Swartz.
29879 - Tor now reads the "circwindow" parameter out of the consensus,
29880 and uses that value for its circuit package window rather than the
29881 default of 1000 cells. Begins the implementation of proposal 168.
29883 o New directory authorities:
29884 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
29886 - Move moria1 and tonga to alternate IP addresses.
29889 - Fix a signed/unsigned compile warning in 0.2.1.19.
29890 - Fix possible segmentation fault on directory authorities. Bugfix on
29892 - Fix an extremely rare infinite recursion bug that could occur if
29893 we tried to log a message after shutting down the log subsystem.
29894 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
29895 - Fix an obscure bug where hidden services on 64-bit big-endian
29896 systems might mis-read the timestamp in v3 introduce cells, and
29897 refuse to connect back to the client. Discovered by "rotor".
29898 Bugfix on 0.2.1.6-alpha.
29899 - We were triggering a CLOCK_SKEW controller status event whenever
29900 we connect via the v2 connection protocol to any relay that has
29901 a wrong clock. Instead, we should only inform the controller when
29902 it's a trusted authority that claims our clock is wrong. Bugfix
29903 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
29904 - We were telling the controller about CHECKING_REACHABILITY and
29905 REACHABILITY_FAILED status events whenever we launch a testing
29906 circuit or notice that one has failed. Instead, only tell the
29907 controller when we want to inform the user of overall success or
29908 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
29910 - Don't warn when we're using a circuit that ends with a node
29911 excluded in ExcludeExitNodes, but the circuit is not used to access
29912 the outside world. This should help fix bug 1090. Bugfix on
29914 - Work around a small memory leak in some versions of OpenSSL that
29915 stopped the memory used by the hostname TLS extension from being
29919 - Add a "getinfo status/accepted-server-descriptor" controller
29920 command, which is the recommended way for controllers to learn
29921 whether our server descriptor has been successfully received by at
29922 least on directory authority. Un-recommend good-server-descriptor
29923 getinfo and status events until we have a better design for them.
29926 Changes in version 0.2.2.5-alpha - 2009-10-11
29927 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
29930 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
29932 o Directory authorities:
29933 - Temporarily (just for this release) move dizum to an alternate
29937 Changes in version 0.2.2.4-alpha - 2009-10-10
29938 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
29939 introduces a new unit test framework, shifts directry authority
29940 addresses around to reduce the impact from recent blocking events,
29941 and fixes a few smaller bugs.
29944 - Fix several more asserts in the circuit_build_times code, for
29945 example one that causes Tor to fail to start once we have
29946 accumulated 5000 build times in the state file. Bugfixes on
29947 0.2.2.2-alpha; fixes bug 1108.
29949 o New directory authorities:
29950 - Move moria1 and Tonga to alternate IP addresses.
29953 - Log SSL state transitions at debug level during handshake, and
29954 include SSL states in error messages. This may help debug future
29955 SSL handshake issues.
29956 - Add a new "Handshake" log domain for activities that happen
29957 during the TLS handshake.
29958 - Revert to the "June 3 2009" ip-to-country file. The September one
29959 seems to have removed most US IP addresses.
29960 - Directory authorities now reject Tor relays with versions less than
29961 0.1.2.14. This step cuts out four relays from the current network,
29962 none of which are very big.
29965 - Fix a couple of smaller issues with gathering statistics. Bugfixes
29967 - Fix two memory leaks in the error case of
29968 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
29969 - Don't count one-hop circuits when we're estimating how long it
29970 takes circuits to build on average. Otherwise we'll set our circuit
29971 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
29972 - Directory authorities no longer change their opinion of, or vote on,
29973 whether a router is Running, unless they have themselves been
29974 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
29977 o Code simplifications and refactoring:
29978 - Revise our unit tests to use the "tinytest" framework, so we
29979 can run tests in their own processes, have smarter setup/teardown
29980 code, and so on. The unit test code has moved to its own
29981 subdirectory, and has been split into multiple modules.
29984 Changes in version 0.2.2.3-alpha - 2009-09-23
29985 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
29988 - Fix an overzealous assert in our new circuit build timeout code.
29989 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
29992 - If the networkstatus consensus tells us that we should use a
29993 negative circuit package window, ignore it. Otherwise we'll
29994 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
29997 Changes in version 0.2.2.2-alpha - 2009-09-21
29998 Tor 0.2.2.2-alpha introduces our latest performance improvement for
29999 clients: Tor tracks the average time it takes to build a circuit, and
30000 avoids using circuits that take too long to build. For fast connections,
30001 this feature can cut your expected latency in half. For slow or flaky
30002 connections, it could ruin your Tor experience. Let us know if it does!
30005 - Tor now tracks how long it takes to build client-side circuits
30006 over time, and adapts its timeout to local network performance.
30007 Since a circuit that takes a long time to build will also provide
30008 bad performance, we get significant latency improvements by
30009 discarding the slowest 20% of circuits. Specifically, Tor creates
30010 circuits more aggressively than usual until it has enough data
30011 points for a good timeout estimate. Implements proposal 151.
30012 We are especially looking for reports (good and bad) from users with
30013 both EDGE and broadband connections that can move from broadband
30014 to EDGE and find out if the build-time data in the .tor/state gets
30015 reset without loss of Tor usability. You should also see a notice
30016 log message telling you that Tor has reset its timeout.
30017 - Directory authorities can now vote on arbitrary integer values as
30018 part of the consensus process. This is designed to help set
30019 network-wide parameters. Implements proposal 167.
30020 - Tor now reads the "circwindow" parameter out of the consensus,
30021 and uses that value for its circuit package window rather than the
30022 default of 1000 cells. Begins the implementation of proposal 168.
30025 - Fix a remotely triggerable memory leak when a consensus document
30026 contains more than one signature from the same voter. Bugfix on
30030 - Fix an extremely rare infinite recursion bug that could occur if
30031 we tried to log a message after shutting down the log subsystem.
30032 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
30033 - Fix parsing for memory or time units given without a space between
30034 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
30035 - A networkstatus vote must contain exactly one signature. Spec
30036 conformance issue. Bugfix on 0.2.0.3-alpha.
30037 - Fix an obscure bug where hidden services on 64-bit big-endian
30038 systems might mis-read the timestamp in v3 introduce cells, and
30039 refuse to connect back to the client. Discovered by "rotor".
30040 Bugfix on 0.2.1.6-alpha.
30041 - We were triggering a CLOCK_SKEW controller status event whenever
30042 we connect via the v2 connection protocol to any relay that has
30043 a wrong clock. Instead, we should only inform the controller when
30044 it's a trusted authority that claims our clock is wrong. Bugfix
30045 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
30046 - We were telling the controller about CHECKING_REACHABILITY and
30047 REACHABILITY_FAILED status events whenever we launch a testing
30048 circuit or notice that one has failed. Instead, only tell the
30049 controller when we want to inform the user of overall success or
30050 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
30052 - Don't warn when we're using a circuit that ends with a node
30053 excluded in ExcludeExitNodes, but the circuit is not used to access
30054 the outside world. This should help fix bug 1090, but more problems
30055 remain. Bugfix on 0.2.1.6-alpha.
30056 - Work around a small memory leak in some versions of OpenSSL that
30057 stopped the memory used by the hostname TLS extension from being
30059 - Make our 'torify' script more portable; if we have only one of
30060 'torsocks' or 'tsocks' installed, don't complain to the user;
30061 and explain our warning about tsocks better.
30064 - Add a "getinfo status/accepted-server-descriptor" controller
30065 command, which is the recommended way for controllers to learn
30066 whether our server descriptor has been successfully received by at
30067 least on directory authority. Un-recommend good-server-descriptor
30068 getinfo and status events until we have a better design for them.
30069 - Update to the "September 4 2009" ip-to-country file.
30072 Changes in version 0.2.2.1-alpha - 2009-08-26
30073 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
30074 Tor clients to bootstrap on networks where only port 80 is reachable,
30075 makes it more straightforward to support hardware crypto accelerators,
30076 and starts the groundwork for gathering stats safely at relays.
30079 - Start the process of disabling ".exit" address notation, since it
30080 can be used for a variety of esoteric application-level attacks
30081 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
30084 o New directory authorities:
30085 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
30089 - New AccelName and AccelDir options add support for dynamic OpenSSL
30090 hardware crypto acceleration engines.
30091 - Tor now supports tunneling all of its outgoing connections over
30092 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
30093 configuration options. Code by Christopher Davis.
30096 - Send circuit or stream sendme cells when our window has decreased
30097 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
30098 by Karsten when testing the "reduce circuit window" performance
30099 patch. Bugfix on the 54th commit on Tor -- from July 2002,
30100 before the release of Tor 0.0.0. This is the new winner of the
30103 o New options for gathering stats safely:
30104 - Directory mirrors that set "DirReqStatistics 1" write statistics
30105 about directory requests to disk every 24 hours. As compared to the
30106 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
30107 1) stats are written to disk exactly every 24 hours; 2) estimated
30108 shares of v2 and v3 requests are determined as mean values, not at
30109 the end of a measurement period; 3) unresolved requests are listed
30110 with country code '??'; 4) directories also measure download times.
30111 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
30112 number of exit streams and transferred bytes per port to disk every
30114 - Relays that set "CellStatistics 1" write statistics on how long
30115 cells spend in their circuit queues to disk every 24 hours.
30116 - Entry nodes that set "EntryStatistics 1" write statistics on the
30117 rough number and origins of connecting clients to disk every 24
30119 - Relays that write any of the above statistics to disk and set
30120 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
30121 their extra-info documents.
30124 - New --digests command-line switch to output the digests of the
30125 source files Tor was built with.
30126 - The "torify" script now uses torsocks where available.
30127 - The memarea code now uses a sentinel value at the end of each area
30128 to make sure nothing writes beyond the end of an area. This might
30129 help debug some conceivable causes of bug 930.
30130 - Time and memory units in the configuration file can now be set to
30131 fractional units. For example, "2.5 GB" is now a valid value for
30133 - Certain Tor clients (such as those behind check.torproject.org) may
30134 want to fetch the consensus in an extra early manner. To enable this
30135 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
30136 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
30137 as only certain clients who must have this information sooner should
30139 - Instead of adding the svn revision to the Tor version string, report
30140 the git commit (when we're building from a git checkout).
30143 - If any of the v3 certs we download are unparseable, we should
30144 actually notice the failure so we don't retry indefinitely. Bugfix
30145 on 0.2.0.x; reported by "rotator".
30146 - If the cached cert file is unparseable, warn but don't exit.
30147 - Fix possible segmentation fault on directory authorities. Bugfix on
30149 - When Tor fails to parse a descriptor of any kind, dump it to disk.
30150 Might help diagnosing bug 1051.
30152 o Deprecated and removed features:
30153 - The controller no longer accepts the old obsolete "addr-mappings/"
30154 or "unregistered-servers-" GETINFO values.
30155 - Hidden services no longer publish version 0 descriptors, and clients
30156 do not request or use version 0 descriptors. However, the old hidden
30157 service authorities still accept and serve version 0 descriptors
30158 when contacted by older hidden services/clients.
30159 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
30160 always on; using them is necessary for correct forward-compatible
30162 - Remove support for .noconnect style addresses. Nobody was using
30163 them, and they provided another avenue for detecting Tor users
30164 via application-level web tricks.
30166 o Packaging changes:
30167 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
30168 installer bundles. See
30169 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
30170 for details of what's new in Vidalia 0.2.3.
30171 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
30172 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
30173 configuration file, rather than the old Privoxy.
30174 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
30175 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
30176 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
30177 better compatibility with OS X 10.6, aka Snow Leopard.
30178 - OS X Vidalia Bundle: The multi-package installer is now replaced
30179 by a simple drag and drop to the /Applications folder. This change
30180 occurred with the upgrade to Vidalia 0.2.3.
30183 Changes in version 0.2.1.19 - 2009-07-28
30184 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
30185 services on Tor 0.2.1.3-alpha through 0.2.1.18.
30188 - Make accessing hidden services on 0.2.1.x work right again.
30189 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
30190 part of patch provided by "optimist".
30193 - When a relay/bridge is writing out its identity key fingerprint to
30194 the "fingerprint" file and to its logs, write it without spaces. Now
30195 it will look like the fingerprints in our bridges documentation,
30196 and confuse fewer users.
30199 - Relays no longer publish a new server descriptor if they change
30200 their MaxAdvertisedBandwidth config option but it doesn't end up
30201 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
30202 fixes bug 1026. Patch from Sebastian.
30203 - Avoid leaking memory every time we get a create cell but we have
30204 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
30205 fixes bug 1034. Reported by BarkerJr.
30208 Changes in version 0.2.1.18 - 2009-07-24
30209 Tor 0.2.1.18 lays the foundations for performance improvements,
30210 adds status events to help users diagnose bootstrap problems, adds
30211 optional authentication/authorization for hidden services, fixes a
30212 variety of potential anonymity problems, and includes a huge pile of
30213 other features and bug fixes.
30216 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
30219 Changes in version 0.2.1.17-rc - 2009-07-07
30220 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
30221 candidate for the 0.2.1.x series. It lays the groundwork for further
30222 client performance improvements, and also fixes a big bug with directory
30223 authorities that were causing them to assign Guard and Stable flags
30226 The Windows bundles also finally include the geoip database that we
30227 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
30228 should actually install Torbutton rather than giving you a cryptic
30229 failure message (oops).
30232 - Clients now use the bandwidth values in the consensus, rather than
30233 the bandwidth values in each relay descriptor. This approach opens
30234 the door to more accurate bandwidth estimates once the directory
30235 authorities start doing active measurements. Implements more of
30239 - When Tor clients restart after 1-5 days, they discard all their
30240 cached descriptors as too old, but they still use the cached
30241 consensus document. This approach is good for robustness, but
30242 bad for performance: since they don't know any bandwidths, they
30243 end up choosing at random rather than weighting their choice by
30244 speed. Fixed by the above feature of putting bandwidths in the
30245 consensus. Bugfix on 0.2.0.x.
30246 - Directory authorities were neglecting to mark relays down in their
30247 internal histories if the relays fall off the routerlist without
30248 ever being found unreachable. So there were relays in the histories
30249 that haven't been seen for eight months, and are listed as being
30250 up for eight months. This wreaked havoc on the "median wfu"
30251 and "median mtbf" calculations, in turn making Guard and Stable
30252 flags very wrong, hurting network performance. Fixes bugs 696 and
30253 969. Bugfix on 0.2.0.6-alpha.
30256 - Serve the DirPortFrontPage page even when we have been approaching
30257 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
30258 - The control port would close the connection before flushing long
30259 replies, such as the network consensus, if a QUIT command was issued
30260 before the reply had completed. Now, the control port flushes all
30261 pending replies before closing the connection. Also fixed a spurious
30262 warning when a QUIT command is issued after a malformed or rejected
30263 AUTHENTICATE command, but before the connection was closed. Patch
30264 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
30265 - When we can't find an intro key for a v2 hidden service descriptor,
30266 fall back to the v0 hidden service descriptor and log a bug message.
30267 Workaround for bug 1024.
30268 - Fix a log message that did not respect the SafeLogging option.
30272 - If we're a relay and we change our IP address, be more verbose
30273 about the reason that made us change. Should help track down
30274 further bugs for relays on dynamic IP addresses.
30277 Changes in version 0.2.0.35 - 2009-06-24
30279 - Avoid crashing in the presence of certain malformed descriptors.
30280 Found by lark, and by automated fuzzing.
30281 - Fix an edge case where a malicious exit relay could convince a
30282 controller that the client's DNS question resolves to an internal IP
30283 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
30286 - Finally fix the bug where dynamic-IP relays disappear when their
30287 IP address changes: directory mirrors were mistakenly telling
30288 them their old address if they asked via begin_dir, so they
30289 never got an accurate answer about their new address, so they
30290 just vanished after a day. For belt-and-suspenders, relays that
30291 don't set Address in their config now avoid using begin_dir for
30292 all direct connections. Should fix bugs 827, 883, and 900.
30293 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
30294 that would occur on some exit nodes when DNS failures and timeouts
30295 occurred in certain patterns. Fix for bug 957.
30298 - When starting with a cache over a few days old, do not leak
30299 memory for the obsolete router descriptors in it. Bugfix on
30300 0.2.0.33; fixes bug 672.
30301 - Hidden service clients didn't use a cached service descriptor that
30302 was older than 15 minutes, but wouldn't fetch a new one either,
30303 because there was already one in the cache. Now, fetch a v2
30304 descriptor unless the same descriptor was added to the cache within
30305 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
30308 Changes in version 0.2.1.16-rc - 2009-06-20
30309 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
30310 a bunch of minor bugs.
30313 - Fix an edge case where a malicious exit relay could convince a
30314 controller that the client's DNS question resolves to an internal IP
30315 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
30317 o Major performance improvements (on 0.2.0.x):
30318 - Disable and refactor some debugging checks that forced a linear scan
30319 over the whole server-side DNS cache. These accounted for over 50%
30320 of CPU time on a relatively busy exit node's gprof profile. Found
30322 - Disable some debugging checks that appeared in exit node profile
30326 - Update to the "June 3 2009" ip-to-country file.
30327 - Do not have tor-resolve automatically refuse all .onion addresses;
30328 if AutomapHostsOnResolve is set in your torrc, this will work fine.
30330 o Minor bugfixes (on 0.2.0.x):
30331 - Log correct error messages for DNS-related network errors on
30333 - Fix a race condition that could cause crashes or memory corruption
30334 when running as a server with a controller listening for log
30336 - Avoid crashing when we have a policy specified in a DirPolicy or
30337 SocksPolicy or ReachableAddresses option with ports set on it,
30338 and we re-load the policy. May fix bug 996.
30339 - Hidden service clients didn't use a cached service descriptor that
30340 was older than 15 minutes, but wouldn't fetch a new one either,
30341 because there was already one in the cache. Now, fetch a v2
30342 descriptor unless the same descriptor was added to the cache within
30343 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
30345 o Minor bugfixes (on 0.2.1.x):
30346 - Don't warn users about low port and hibernation mix when they
30347 provide a *ListenAddress directive to fix that. Bugfix on
30349 - When switching back and forth between bridge mode, do not start
30350 gathering GeoIP data until two hours have passed.
30351 - Do not complain that the user has requested an excluded node as
30352 an exit when the node is not really an exit. This could happen
30353 because the circuit was for testing, or an introduction point.
30357 Changes in version 0.2.1.15-rc - 2009-05-25
30358 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
30359 series. It fixes a major bug on fast exit relays, as well as a variety
30360 of more minor bugs.
30362 o Major bugfixes (on 0.2.0.x):
30363 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
30364 that would occur on some exit nodes when DNS failures and timeouts
30365 occurred in certain patterns. Fix for bug 957.
30367 o Minor bugfixes (on 0.2.0.x):
30368 - Actually return -1 in the error case for read_bandwidth_usage().
30369 Harmless bug, since we currently don't care about the return value
30370 anywhere. Bugfix on 0.2.0.9-alpha.
30371 - Provide a more useful log message if bug 977 (related to buffer
30372 freelists) ever reappears, and do not crash right away.
30373 - Fix an assertion failure on 64-bit platforms when we allocated
30374 memory right up to the end of a memarea, then realigned the memory
30375 one step beyond the end. Fixes a possible cause of bug 930.
30376 - Protect the count of open sockets with a mutex, so we can't
30377 corrupt it when two threads are closing or opening sockets at once.
30378 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
30379 - Don't allow a bridge to publish its router descriptor to a
30380 non-bridge directory authority. Fixes part of bug 932.
30381 - When we change to or from being a bridge, reset our counts of
30382 client usage by country. Fixes bug 932.
30383 - Fix a bug that made stream bandwidth get misreported to the
30385 - Stop using malloc_usable_size() to use more area than we had
30386 actually allocated: it was safe, but made valgrind really unhappy.
30387 - Fix a memory leak when v3 directory authorities load their keys
30388 and cert from disk. Bugfix on 0.2.0.1-alpha.
30390 o Minor bugfixes (on 0.2.1.x):
30391 - Fix use of freed memory when deciding to mark a non-addable
30392 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
30395 Changes in version 0.2.1.14-rc - 2009-04-12
30396 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
30397 series. It begins fixing some major performance problems, and also
30398 finally addresses the bug that was causing relays on dynamic IP
30399 addresses to fall out of the directory.
30402 - Clients replace entry guards that were chosen more than a few months
30403 ago. This change should significantly improve client performance,
30404 especially once more people upgrade, since relays that have been
30405 a guard for a long time are currently overloaded.
30407 o Major bugfixes (on 0.2.0):
30408 - Finally fix the bug where dynamic-IP relays disappear when their
30409 IP address changes: directory mirrors were mistakenly telling
30410 them their old address if they asked via begin_dir, so they
30411 never got an accurate answer about their new address, so they
30412 just vanished after a day. For belt-and-suspenders, relays that
30413 don't set Address in their config now avoid using begin_dir for
30414 all direct connections. Should fix bugs 827, 883, and 900.
30415 - Relays were falling out of the networkstatus consensus for
30416 part of a day if they changed their local config but the
30417 authorities discarded their new descriptor as "not sufficiently
30418 different". Now directory authorities accept a descriptor as changed
30419 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
30420 patch by Sebastian.
30421 - Avoid crashing in the presence of certain malformed descriptors.
30422 Found by lark, and by automated fuzzing.
30425 - When generating circuit events with verbose nicknames for
30426 controllers, try harder to look up nicknames for routers on a
30427 circuit. (Previously, we would look in the router descriptors we had
30428 for nicknames, but not in the consensus.) Partial fix for bug 941.
30429 - If the bridge config line doesn't specify a port, assume 443.
30430 This makes bridge lines a bit smaller and easier for users to
30432 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
30433 bytes (aka 20KB/s), to match our documentation. Also update
30434 directory authorities so they always assign the Fast flag to relays
30435 with 20KB/s of capacity. Now people running relays won't suddenly
30436 find themselves not seeing any use, if the network gets faster
30438 - Update to the "April 3 2009" ip-to-country file.
30441 - Avoid trying to print raw memory to the logs when we decide to
30442 give up on downloading a given relay descriptor. Bugfix on
30444 - In tor-resolve, when the Tor client to use is specified by
30445 <hostname>:<port>, actually use the specified port rather than
30446 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
30447 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
30448 - When starting with a cache over a few days old, do not leak
30449 memory for the obsolete router descriptors in it. Bugfix on
30451 - Avoid double-free on list of successfully uploaded hidden
30452 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
30453 - Change memarea_strndup() implementation to work even when
30454 duplicating a string at the end of a page. This bug was
30455 harmless for now, but could have meant crashes later. Fix by
30456 lark. Bugfix on 0.2.1.1-alpha.
30457 - Limit uploaded directory documents to be 16M rather than 500K.
30458 The directory authorities were refusing v3 consensus votes from
30459 other authorities, since the votes are now 504K. Fixes bug 959;
30460 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
30461 - Directory authorities should never send a 503 "busy" response to
30462 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
30466 Changes in version 0.2.1.13-alpha - 2009-03-09
30467 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
30468 cleanups. We're finally getting close to a release candidate.
30471 - Correctly update the list of which countries we exclude as
30472 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
30473 lark. Bugfix on 0.2.1.6-alpha.
30475 o Minor bugfixes (on 0.2.0.x and earlier):
30476 - Automatically detect MacOSX versions earlier than 10.4.0, and
30477 disable kqueue from inside Tor when running with these versions.
30478 We previously did this from the startup script, but that was no
30479 help to people who didn't use the startup script. Resolves bug 863.
30480 - When we had picked an exit node for a connection, but marked it as
30481 "optional", and it turned out we had no onion key for the exit,
30482 stop wanting that exit and try again. This situation may not
30483 be possible now, but will probably become feasible with proposal
30484 158. Spotted by rovv. Fixes another case of bug 752.
30485 - Clients no longer cache certificates for authorities they do not
30486 recognize. Bugfix on 0.2.0.9-alpha.
30487 - When we can't transmit a DNS request due to a network error, retry
30488 it after a while, and eventually transmit a failing response to
30489 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
30490 - If the controller claimed responsibility for a stream, but that
30491 stream never finished making its connection, it would live
30492 forever in circuit_wait state. Now we close it after SocksTimeout
30493 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
30494 - Drop begin cells to a hidden service if they come from the middle
30495 of a circuit. Patch from lark.
30496 - When we erroneously receive two EXTEND cells for the same circuit
30497 ID on the same connection, drop the second. Patch from lark.
30498 - Fix a crash that occurs on exit nodes when a nameserver request
30499 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
30500 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
30502 - Do not assume that a stack-allocated character array will be
30503 64-bit aligned on platforms that demand that uint64_t access is
30504 aligned. Possible fix for bug 604.
30505 - Parse dates and IPv4 addresses in a locale- and libc-independent
30506 manner, to avoid platform-dependent behavior on malformed input.
30507 - Build correctly when configured to build outside the main source
30508 path. Patch from Michael Gold.
30509 - We were already rejecting relay begin cells with destination port
30510 of 0. Now also reject extend cells with destination port or address
30511 of 0. Suggested by lark.
30513 o Minor bugfixes (on 0.2.1.x):
30514 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
30515 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
30516 - If we're an exit node, scrub the IP address to which we are exiting
30517 in the logs. Bugfix on 0.2.1.8-alpha.
30520 - On Linux, use the prctl call to re-enable core dumps when the user
30522 - New controller event NEWCONSENSUS that lists the networkstatus
30523 lines for every recommended relay. Now controllers like Torflow
30524 can keep up-to-date on which relays they should be using.
30525 - Update to the "February 26 2009" ip-to-country file.
30528 Changes in version 0.2.0.34 - 2009-02-08
30529 Tor 0.2.0.34 features several more security-related fixes. You should
30530 upgrade, especially if you run an exit relay (remote crash) or a
30531 directory authority (remote infinite loop), or you're on an older
30532 (pre-XP) or not-recently-patched Windows (remote exploit).
30534 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
30535 have many known flaws, and nobody should be using them. You should
30536 upgrade. If you're using a Linux or BSD and its packages are obsolete,
30537 stop using those packages and upgrade anyway.
30540 - Fix an infinite-loop bug on handling corrupt votes under certain
30541 circumstances. Bugfix on 0.2.0.8-alpha.
30542 - Fix a temporary DoS vulnerability that could be performed by
30543 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
30544 - Avoid a potential crash on exit nodes when processing malformed
30545 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
30546 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
30547 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
30550 - Fix compilation on systems where time_t is a 64-bit integer.
30551 Patch from Matthias Drochner.
30552 - Don't consider expiring already-closed client connections. Fixes
30553 bug 893. Bugfix on 0.0.2pre20.
30556 Changes in version 0.2.1.12-alpha - 2009-02-08
30557 Tor 0.2.1.12-alpha features several more security-related fixes. You
30558 should upgrade, especially if you run an exit relay (remote crash) or
30559 a directory authority (remote infinite loop), or you're on an older
30560 (pre-XP) or not-recently-patched Windows (remote exploit). It also
30561 includes a big pile of minor bugfixes and cleanups.
30564 - Fix an infinite-loop bug on handling corrupt votes under certain
30565 circumstances. Bugfix on 0.2.0.8-alpha.
30566 - Fix a temporary DoS vulnerability that could be performed by
30567 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
30568 - Avoid a potential crash on exit nodes when processing malformed
30569 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
30572 - Let controllers actually ask for the "clients_seen" event for
30573 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
30574 reported by Matt Edman.
30575 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
30577 - Fix a bug in address parsing that was preventing bridges or hidden
30578 service targets from being at IPv6 addresses.
30579 - Solve a bug that kept hardware crypto acceleration from getting
30580 enabled when accounting was turned on. Fixes bug 907. Bugfix on
30582 - Remove a bash-ism from configure.in to build properly on non-Linux
30583 platforms. Bugfix on 0.2.1.1-alpha.
30584 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
30585 headers. Bugfix on 0.2.0.10-alpha.
30586 - Don't consider expiring already-closed client connections. Fixes
30587 bug 893. Bugfix on 0.0.2pre20.
30588 - Fix another interesting corner-case of bug 891 spotted by rovv:
30589 Previously, if two hosts had different amounts of clock drift, and
30590 one of them created a new connection with just the wrong timing,
30591 the other might decide to deprecate the new connection erroneously.
30592 Bugfix on 0.1.1.13-alpha.
30593 - Resolve a very rare crash bug that could occur when the user forced
30594 a nameserver reconfiguration during the middle of a nameserver
30595 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
30596 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
30597 Bugfix on 0.2.1.7-alpha.
30598 - If we're using bridges and our network goes away, be more willing
30599 to forgive our bridges and try again when we get an application
30600 request. Bugfix on 0.2.0.x.
30603 - Support platforms where time_t is 64 bits long. (Congratulations,
30604 NetBSD!) Patch from Matthias Drochner.
30605 - Add a 'getinfo status/clients-seen' controller command, in case
30606 controllers want to hear clients_seen events but connect late.
30609 - Disable GCC's strict alias optimization by default, to avoid the
30610 likelihood of its introducing subtle bugs whenever our code violates
30611 the letter of C99's alias rules.
30614 Changes in version 0.2.0.33 - 2009-01-21
30615 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
30616 useful to users. It also finally fixes a bug where a relay or client
30617 that's been off for many days would take a long time to bootstrap.
30619 This update also fixes an important security-related bug reported by
30620 Ilja van Sprundel. You should upgrade. (We'll send out more details
30621 about the bug once people have had some time to upgrade.)
30624 - Fix a heap-corruption bug that may be remotely triggerable on
30625 some platforms. Reported by Ilja van Sprundel.
30628 - When a stream at an exit relay is in state "resolving" or
30629 "connecting" and it receives an "end" relay cell, the exit relay
30630 would silently ignore the end cell and not close the stream. If
30631 the client never closes the circuit, then the exit relay never
30632 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
30633 reported by "wood".
30634 - When sending CREATED cells back for a given circuit, use a 64-bit
30635 connection ID to find the right connection, rather than an addr:port
30636 combination. Now that we can have multiple OR connections between
30637 the same ORs, it is no longer possible to use addr:port to uniquely
30638 identify a connection.
30639 - Bridge relays that had DirPort set to 0 would stop fetching
30640 descriptors shortly after startup, and then briefly resume
30641 after a new bandwidth test and/or after publishing a new bridge
30642 descriptor. Bridge users that try to bootstrap from them would
30643 get a recent networkstatus but would get descriptors from up to
30644 18 hours earlier, meaning most of the descriptors were obsolete
30645 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
30646 - Prevent bridge relays from serving their 'extrainfo' document
30647 to anybody who asks, now that extrainfo docs include potentially
30648 sensitive aggregated client geoip summaries. Bugfix on
30650 - If the cached networkstatus consensus is more than five days old,
30651 discard it rather than trying to use it. In theory it could be
30652 useful because it lists alternate directory mirrors, but in practice
30653 it just means we spend many minutes trying directory mirrors that
30654 are long gone from the network. Also discard router descriptors as
30655 we load them if they are more than five days old, since the onion
30656 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
30659 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
30660 could make gcc generate non-functional binary search code. Bugfix
30662 - Build correctly on platforms without socklen_t.
30663 - Compile without warnings on solaris.
30664 - Avoid potential crash on internal error during signature collection.
30665 Fixes bug 864. Patch from rovv.
30666 - Correct handling of possible malformed authority signing key
30667 certificates with internal signature types. Fixes bug 880.
30668 Bugfix on 0.2.0.3-alpha.
30669 - Fix a hard-to-trigger resource leak when logging credential status.
30671 - When we can't initialize DNS because the network is down, do not
30672 automatically stop Tor from starting. Instead, we retry failed
30673 dns_init() every 10 minutes, and change the exit policy to reject
30674 *:* until one succeeds. Fixes bug 691.
30675 - Use 64 bits instead of 32 bits for connection identifiers used with
30676 the controller protocol, to greatly reduce risk of identifier reuse.
30677 - When we're choosing an exit node for a circuit, and we have
30678 no pending streams, choose a good general exit rather than one that
30679 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
30680 - Fix another case of assuming, when a specific exit is requested,
30681 that we know more than the user about what hosts it allows.
30682 Fixes one case of bug 752. Patch from rovv.
30683 - Clip the MaxCircuitDirtiness config option to a minimum of 10
30684 seconds. Warn the user if lower values are given in the
30685 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
30686 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
30687 user if lower values are given in the configuration. Bugfix on
30688 0.1.1.17-rc. Patch by Sebastian.
30689 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
30690 the cache because we already had a v0 descriptor with the same ID.
30691 Bugfix on 0.2.0.18-alpha.
30692 - Fix a race condition when freeing keys shared between main thread
30693 and CPU workers that could result in a memory leak. Bugfix on
30694 0.1.0.1-rc. Fixes bug 889.
30695 - Send a valid END cell back when a client tries to connect to a
30696 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
30697 840. Patch from rovv.
30698 - Check which hops rendezvous stream cells are associated with to
30699 prevent possible guess-the-streamid injection attacks from
30700 intermediate hops. Fixes another case of bug 446. Based on patch
30702 - If a broken client asks a non-exit router to connect somewhere,
30703 do not even do the DNS lookup before rejecting the connection.
30704 Fixes another case of bug 619. Patch from rovv.
30705 - When a relay gets a create cell it can't decrypt (e.g. because it's
30706 using the wrong onion key), we were dropping it and letting the
30707 client time out. Now actually answer with a destroy cell. Fixes
30708 bug 904. Bugfix on 0.0.2pre8.
30710 o Minor bugfixes (hidden services):
30711 - Do not throw away existing introduction points on SIGHUP. Bugfix on
30712 0.0.6pre1. Patch by Karsten. Fixes bug 874.
30715 - Report the case where all signatures in a detached set are rejected
30716 differently than the case where there is an error handling the
30718 - When we realize that another process has modified our cached
30719 descriptors, print out a more useful error message rather than
30720 triggering an assertion. Fixes bug 885. Patch from Karsten.
30721 - Implement the 0x20 hack to better resist DNS poisoning: set the
30722 case on outgoing DNS requests randomly, and reject responses that do
30723 not match the case correctly. This logic can be disabled with the
30724 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
30725 of servers that do not reliably preserve case in replies. See
30726 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
30728 - Check DNS replies for more matching fields to better resist DNS
30730 - Never use OpenSSL compression: it wastes RAM and CPU trying to
30731 compress cells, which are basically all encrypted, compressed, or
30735 Changes in version 0.2.1.11-alpha - 2009-01-20
30736 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
30737 week it will take a long time to bootstrap again" bug. It also fixes
30738 an important security-related bug reported by Ilja van Sprundel. You
30739 should upgrade. (We'll send out more details about the bug once people
30740 have had some time to upgrade.)
30743 - Fix a heap-corruption bug that may be remotely triggerable on
30744 some platforms. Reported by Ilja van Sprundel.
30747 - Discard router descriptors as we load them if they are more than
30748 five days old. Otherwise if Tor is off for a long time and then
30749 starts with cached descriptors, it will try to use the onion
30750 keys in those obsolete descriptors when building circuits. Bugfix
30751 on 0.2.0.x. Fixes bug 887.
30754 - Try to make sure that the version of Libevent we're running with
30755 is binary-compatible with the one we built with. May address bug
30757 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
30758 for bug 905. Bugfix on 0.2.1.7-alpha.
30759 - Add a new --enable-local-appdata configuration switch to change
30760 the default location of the datadir on win32 from APPDATA to
30761 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
30762 entirely. Patch from coderman.
30765 - Make outbound DNS packets respect the OutboundBindAddress setting.
30766 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
30767 - When our circuit fails at the first hop (e.g. we get a destroy
30768 cell back), avoid using that OR connection anymore, and also
30769 tell all the one-hop directory requests waiting for it that they
30770 should fail. Bugfix on 0.2.1.3-alpha.
30771 - In the torify(1) manpage, mention that tsocks will leak your
30775 Changes in version 0.2.1.10-alpha - 2009-01-06
30776 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
30777 would make the bridge relay not so useful if it had DirPort set to 0,
30778 and one that could let an attacker learn a little bit of information
30779 about the bridge's users), and a bug that would cause your Tor relay
30780 to ignore a circuit create request it can't decrypt (rather than reply
30781 with an error). It also fixes a wide variety of other bugs.
30784 - If the cached networkstatus consensus is more than five days old,
30785 discard it rather than trying to use it. In theory it could
30786 be useful because it lists alternate directory mirrors, but in
30787 practice it just means we spend many minutes trying directory
30788 mirrors that are long gone from the network. Helps bug 887 a bit;
30790 - Bridge relays that had DirPort set to 0 would stop fetching
30791 descriptors shortly after startup, and then briefly resume
30792 after a new bandwidth test and/or after publishing a new bridge
30793 descriptor. Bridge users that try to bootstrap from them would
30794 get a recent networkstatus but would get descriptors from up to
30795 18 hours earlier, meaning most of the descriptors were obsolete
30796 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
30797 - Prevent bridge relays from serving their 'extrainfo' document
30798 to anybody who asks, now that extrainfo docs include potentially
30799 sensitive aggregated client geoip summaries. Bugfix on
30803 - New controller event "clients_seen" to report a geoip-based summary
30804 of which countries we've seen clients from recently. Now controllers
30805 like Vidalia can show bridge operators that they're actually making
30807 - Build correctly against versions of OpenSSL 0.9.8 or later built
30808 without support for deprecated functions.
30809 - Update to the "December 19 2008" ip-to-country file.
30811 o Minor bugfixes (on 0.2.0.x):
30812 - Authorities now vote for the Stable flag for any router whose
30813 weighted MTBF is at least 5 days, regardless of the mean MTBF.
30814 - Do not remove routers as too old if we do not have any consensus
30815 document. Bugfix on 0.2.0.7-alpha.
30816 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
30817 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
30818 - When an exit relay resolves a stream address to a local IP address,
30819 do not just keep retrying that same exit relay over and
30820 over. Instead, just close the stream. Addresses bug 872. Bugfix
30821 on 0.2.0.32. Patch from rovv.
30822 - If a hidden service sends us an END cell, do not consider
30823 retrying the connection; just close it. Patch from rovv.
30824 - When we made bridge authorities stop serving bridge descriptors over
30825 unencrypted links, we also broke DirPort reachability testing for
30826 bridges. So bridges with a non-zero DirPort were printing spurious
30827 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
30828 - When a relay gets a create cell it can't decrypt (e.g. because it's
30829 using the wrong onion key), we were dropping it and letting the
30830 client time out. Now actually answer with a destroy cell. Fixes
30831 bug 904. Bugfix on 0.0.2pre8.
30832 - Squeeze 2-5% out of client performance (according to oprofile) by
30833 improving the implementation of some policy-manipulation functions.
30835 o Minor bugfixes (on 0.2.1.x):
30836 - Make get_interface_address() function work properly again; stop
30837 guessing the wrong parts of our address as our address.
30838 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
30839 send on that circuit. Otherwise we might violate the proposal-110
30840 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
30842 - When we're sending non-EXTEND cells to the first hop in a circuit,
30843 for example to use an encrypted directory connection, we don't need
30844 to use RELAY_EARLY cells: the first hop knows what kind of cell
30845 it is, and nobody else can even see the cell type. Conserving
30846 RELAY_EARLY cells makes it easier to cannibalize circuits like
30848 - Stop logging nameserver addresses in reverse order.
30849 - If we are retrying a directory download slowly over and over, do
30850 not automatically give up after the 254th failure. Bugfix on
30852 - Resume reporting accurate "stream end" reasons to the local control
30853 port. They were lost in the changes for Proposal 148. Bugfix on
30856 o Deprecated and removed features:
30857 - The old "tor --version --version" command, which would print out
30858 the subversion "Id" of most of the source files, is now removed. It
30859 turned out to be less useful than we'd expected, and harder to
30862 o Code simplifications and refactoring:
30863 - Change our header file guard macros to be less likely to conflict
30864 with system headers. Adam Langley noticed that we were conflicting
30865 with log.h on Android.
30866 - Tool-assisted documentation cleanup. Nearly every function or
30867 static variable in Tor should have its own documentation now.
30870 Changes in version 0.2.1.9-alpha - 2008-12-25
30871 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
30873 o New directory authorities:
30874 - gabelmoo (the authority run by Karsten Loesing) now has a new
30878 - Never use a connection with a mismatched address to extend a
30879 circuit, unless that connection is canonical. A canonical
30880 connection is one whose address is authenticated by the router's
30881 identity key, either in a NETINFO cell or in a router descriptor.
30882 - Avoid a possible memory corruption bug when receiving hidden service
30883 descriptors. Bugfix on 0.2.1.6-alpha.
30886 - Fix a logic error that would automatically reject all but the first
30887 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
30888 part of bug 813/868. Bug spotted by coderman.
30889 - When a stream at an exit relay is in state "resolving" or
30890 "connecting" and it receives an "end" relay cell, the exit relay
30891 would silently ignore the end cell and not close the stream. If
30892 the client never closes the circuit, then the exit relay never
30893 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
30894 reported by "wood".
30895 - When we can't initialize DNS because the network is down, do not
30896 automatically stop Tor from starting. Instead, retry failed
30897 dns_init() every 10 minutes, and change the exit policy to reject
30898 *:* until one succeeds. Fixes bug 691.
30901 - Give a better error message when an overzealous init script says
30902 "sudo -u username tor --user username". Makes Bug 882 easier for
30904 - When a directory authority gives us a new guess for our IP address,
30905 log which authority we used. Hopefully this will help us debug
30906 the recent complaints about bad IP address guesses.
30907 - Detect svn revision properly when we're using git-svn.
30908 - Try not to open more than one descriptor-downloading connection
30909 to an authority at once. This should reduce load on directory
30910 authorities. Fixes bug 366.
30911 - Add cross-certification to newly generated certificates, so that
30912 a signing key is enough information to look up a certificate.
30913 Partial implementation of proposal 157.
30914 - Start serving certificates by <identity digest, signing key digest>
30915 pairs. Partial implementation of proposal 157.
30916 - Clients now never report any stream end reason except 'MISC'.
30917 Implements proposal 148.
30918 - On platforms with a maximum syslog string length, truncate syslog
30919 messages to that length ourselves, rather than relying on the
30920 system to do it for us.
30921 - Optimize out calls to time(NULL) that occur for every IO operation,
30922 or for every cell. On systems where time() is a slow syscall,
30923 this fix will be slightly helpful.
30924 - Exit servers can now answer resolve requests for ip6.arpa addresses.
30925 - When we download a descriptor that we then immediately (as
30926 a directory authority) reject, do not retry downloading it right
30927 away. Should save some bandwidth on authorities. Fix for bug
30928 888. Patch by Sebastian Hahn.
30929 - When a download gets us zero good descriptors, do not notify
30930 Tor that new directory information has arrived.
30931 - Avoid some nasty corner cases in the logic for marking connections
30932 as too old or obsolete or noncanonical for circuits. Partial
30935 o Minor features (controller):
30936 - New CONSENSUS_ARRIVED event to note when a new consensus has
30937 been fetched and validated.
30938 - When we realize that another process has modified our cached
30939 descriptors file, print out a more useful error message rather
30940 than triggering an assertion. Fixes bug 885. Patch from Karsten.
30941 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
30942 controllers to prevent SIGHUP from reloading the
30943 configuration. Fixes bug 856.
30946 - Resume using the correct "REASON=" stream when telling the
30947 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
30948 - When a canonical connection appears later in our internal list
30949 than a noncanonical one for a given OR ID, always use the
30950 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
30952 - Clip the MaxCircuitDirtiness config option to a minimum of 10
30953 seconds. Warn the user if lower values are given in the
30954 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
30955 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
30956 user if lower values are given in the configuration. Bugfix on
30957 0.1.1.17-rc. Patch by Sebastian.
30958 - Fix a race condition when freeing keys shared between main thread
30959 and CPU workers that could result in a memory leak. Bugfix on
30960 0.1.0.1-rc. Fixes bug 889.
30962 o Minor bugfixes (hidden services):
30963 - Do not throw away existing introduction points on SIGHUP (bugfix on
30964 0.0.6pre1); also, do not stall hidden services because we're
30965 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
30966 by John Brooks. Patch by Karsten. Fixes bug 874.
30967 - Fix a memory leak when we decline to add a v2 rendezvous
30968 descriptor to the cache because we already had a v0 descriptor
30969 with the same ID. Bugfix on 0.2.0.18-alpha.
30971 o Deprecated and removed features:
30972 - RedirectExits has been removed. It was deprecated since
30974 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
30975 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
30976 - Cell pools are now always enabled; --disable-cell-pools is ignored.
30978 o Code simplifications and refactoring:
30979 - Rename the confusing or_is_obsolete field to the more appropriate
30980 is_bad_for_new_circs, and move it to or_connection_t where it
30982 - Move edge-only flags from connection_t to edge_connection_t: not
30983 only is this better coding, but on machines of plausible alignment,
30984 it should save 4-8 bytes per connection_t. "Every little bit helps."
30985 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
30986 for consistency; keep old option working for backward compatibility.
30987 - Simplify the code for finding connections to use for a circuit.
30990 Changes in version 0.2.1.8-alpha - 2008-12-08
30991 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
30992 builds better on unusual platforms like Solaris and old OS X, and
30993 fixes a variety of other issues.
30996 - New DirPortFrontPage option that takes an html file and publishes
30997 it as "/" on the DirPort. Now relay operators can provide a
30998 disclaimer without needing to set up a separate webserver. There's
30999 a sample disclaimer in contrib/tor-exit-notice.html.
31002 - When the client is choosing entry guards, now it selects at most
31003 one guard from a given relay family. Otherwise we could end up with
31004 all of our entry points into the network run by the same operator.
31005 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
31008 - Fix a DOS opportunity during the voting signature collection process
31009 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
31010 - Fix a possible segfault when establishing an exit connection. Bugfix
31014 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
31016 - Made Tor a little less aggressive about deleting expired
31017 certificates. Partial fix for bug 854.
31018 - Stop doing unaligned memory access that generated bus errors on
31019 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
31020 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
31021 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
31022 - Make USR2 log-level switch take effect immediately. Bugfix on
31024 - If one win32 nameserver fails to get added, continue adding the
31025 rest, and don't automatically fail.
31026 - Use fcntl() for locking when flock() is not available. Should fix
31027 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
31028 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
31029 could make gcc generate non-functional binary search code. Bugfix
31031 - Build correctly on platforms without socklen_t.
31032 - Avoid potential crash on internal error during signature collection.
31033 Fixes bug 864. Patch from rovv.
31034 - Do not use C's stdio library for writing to log files. This will
31035 improve logging performance by a minute amount, and will stop
31036 leaking fds when our disk is full. Fixes bug 861.
31037 - Stop erroneous use of O_APPEND in cases where we did not in fact
31038 want to re-seek to the end of a file before every last write().
31039 - Correct handling of possible malformed authority signing key
31040 certificates with internal signature types. Fixes bug 880. Bugfix
31042 - Fix a hard-to-trigger resource leak when logging credential status.
31046 - Directory mirrors no longer fetch the v1 directory or
31047 running-routers files. They are obsolete, and nobody asks for them
31048 anymore. This is the first step to making v1 authorities obsolete.
31050 o Minor features (controller):
31051 - Return circuit purposes in response to GETINFO circuit-status. Fixes
31055 Changes in version 0.2.0.32 - 2008-11-20
31056 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
31057 packages (and maybe other packages) noticed by Theo de Raadt, fixes
31058 a smaller security flaw that might allow an attacker to access local
31059 services, further improves hidden service performance, and fixes a
31060 variety of other issues.
31063 - The "User" and "Group" config options did not clear the
31064 supplementary group entries for the Tor process. The "User" option
31065 is now more robust, and we now set the groups to the specified
31066 user's primary group. The "Group" option is now ignored. For more
31067 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
31068 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
31069 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
31070 - The "ClientDNSRejectInternalAddresses" config option wasn't being
31071 consistently obeyed: if an exit relay refuses a stream because its
31072 exit policy doesn't allow it, we would remember what IP address
31073 the relay said the destination address resolves to, even if it's
31074 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
31077 - Fix a DOS opportunity during the voting signature collection process
31078 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
31080 o Major bugfixes (hidden services):
31081 - When fetching v0 and v2 rendezvous service descriptors in parallel,
31082 we were failing the whole hidden service request when the v0
31083 descriptor fetch fails, even if the v2 fetch is still pending and
31084 might succeed. Similarly, if the last v2 fetch fails, we were
31085 failing the whole hidden service request even if a v0 fetch is
31086 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
31087 - When extending a circuit to a hidden service directory to upload a
31088 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
31089 requests failed, because the router descriptor has not been
31090 downloaded yet. In these cases, do not attempt to upload the
31091 rendezvous descriptor, but wait until the router descriptor is
31092 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
31093 descriptor from a hidden service directory for which the router
31094 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
31098 - Fix several infrequent memory leaks spotted by Coverity.
31099 - When testing for libevent functions, set the LDFLAGS variable
31100 correctly. Found by Riastradh.
31101 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
31102 bootstrapping with tunneled directory connections. Bugfix on
31103 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
31104 - When asked to connect to A.B.exit:80, if we don't know the IP for A
31105 and we know that server B rejects most-but-not all connections to
31106 port 80, we would previously reject the connection. Now, we assume
31107 the user knows what they were asking for. Fixes bug 752. Bugfix
31108 on 0.0.9rc5. Diagnosed by BarkerJr.
31109 - If we overrun our per-second write limits a little, count this as
31110 having used up our write allocation for the second, and choke
31111 outgoing directory writes. Previously, we had only counted this when
31112 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
31113 Bugfix on 0.2.0.x (??).
31114 - Remove the old v2 directory authority 'lefkada' from the default
31115 list. It has been gone for many months.
31116 - Stop doing unaligned memory access that generated bus errors on
31117 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
31118 - Make USR2 log-level switch take effect immediately. Bugfix on
31121 o Minor bugfixes (controller):
31122 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
31123 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
31126 Changes in version 0.2.1.7-alpha - 2008-11-08
31127 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
31128 packages (and maybe other packages) noticed by Theo de Raadt, fixes
31129 a smaller security flaw that might allow an attacker to access local
31130 services, adds better defense against DNS poisoning attacks on exit
31131 relays, further improves hidden service performance, and fixes a
31132 variety of other issues.
31135 - The "ClientDNSRejectInternalAddresses" config option wasn't being
31136 consistently obeyed: if an exit relay refuses a stream because its
31137 exit policy doesn't allow it, we would remember what IP address
31138 the relay said the destination address resolves to, even if it's
31139 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
31140 - The "User" and "Group" config options did not clear the
31141 supplementary group entries for the Tor process. The "User" option
31142 is now more robust, and we now set the groups to the specified
31143 user's primary group. The "Group" option is now ignored. For more
31144 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
31145 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
31146 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
31147 - Do not use or believe expired v3 authority certificates. Patch
31148 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
31151 - Now NodeFamily and MyFamily config options allow spaces in
31152 identity fingerprints, so it's easier to paste them in.
31153 Suggested by Lucky Green.
31154 - Implement the 0x20 hack to better resist DNS poisoning: set the
31155 case on outgoing DNS requests randomly, and reject responses that do
31156 not match the case correctly. This logic can be disabled with the
31157 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
31158 of servers that do not reliably preserve case in replies. See
31159 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
31161 - Preserve case in replies to DNSPort requests in order to support
31162 the 0x20 hack for resisting DNS poisoning attacks.
31164 o Hidden service performance improvements:
31165 - When the client launches an introduction circuit, retry with a
31166 new circuit after 30 seconds rather than 60 seconds.
31167 - Launch a second client-side introduction circuit in parallel
31168 after a delay of 15 seconds (based on work by Christian Wilms).
31169 - Hidden services start out building five intro circuits rather
31170 than three, and when the first three finish they publish a service
31171 descriptor using those. Now we publish our service descriptor much
31172 faster after restart.
31175 - Minor fix in the warning messages when you're having problems
31176 bootstrapping; also, be more forgiving of bootstrap problems when
31177 we're still making incremental progress on a given bootstrap phase.
31178 - When we're choosing an exit node for a circuit, and we have
31179 no pending streams, choose a good general exit rather than one that
31180 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
31181 - Send a valid END cell back when a client tries to connect to a
31182 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
31183 840. Patch from rovv.
31184 - If a broken client asks a non-exit router to connect somewhere,
31185 do not even do the DNS lookup before rejecting the connection.
31186 Fixes another case of bug 619. Patch from rovv.
31187 - Fix another case of assuming, when a specific exit is requested,
31188 that we know more than the user about what hosts it allows.
31189 Fixes another case of bug 752. Patch from rovv.
31190 - Check which hops rendezvous stream cells are associated with to
31191 prevent possible guess-the-streamid injection attacks from
31192 intermediate hops. Fixes another case of bug 446. Based on patch
31194 - Avoid using a negative right-shift when comparing 32-bit
31195 addresses. Possible fix for bug 845 and bug 811.
31196 - Make the assert_circuit_ok() function work correctly on circuits that
31197 have already been marked for close.
31198 - Fix read-off-the-end-of-string error in unit tests when decoding
31199 introduction points.
31200 - Fix uninitialized size field for memory area allocation: may improve
31201 memory performance during directory parsing.
31202 - Treat duplicate certificate fetches as failures, so that we do
31203 not try to re-fetch an expired certificate over and over and over.
31204 - Do not say we're fetching a certificate when we'll in fact skip it
31205 because of a pending download.
31208 Changes in version 0.2.1.6-alpha - 2008-09-30
31209 Tor 0.2.1.6-alpha further improves performance and robustness of
31210 hidden services, starts work on supporting per-country relay selection,
31211 and fixes a variety of smaller issues.
31214 - Implement proposal 121: make it possible to build hidden services
31215 that only certain clients are allowed to connect to. This is
31216 enforced at several points, so that unauthorized clients are unable
31217 to send INTRODUCE cells to the service, or even (depending on the
31218 type of authentication) to learn introduction points. This feature
31219 raises the bar for certain kinds of active attacks against hidden
31220 services. Code by Karsten Loesing.
31221 - Relays now store and serve v2 hidden service descriptors by default,
31222 i.e., the new default value for HidServDirectoryV2 is 1. This is
31223 the last step in proposal 114, which aims to make hidden service
31224 lookups more reliable.
31225 - Start work to allow node restrictions to include country codes. The
31226 syntax to exclude nodes in a country with country code XX is
31227 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
31228 refinement to decide what config options should take priority if
31229 you ask to both use a particular node and exclude it.
31230 - Allow ExitNodes list to include IP ranges and country codes, just
31231 like the Exclude*Nodes lists. Patch from Robert Hogan.
31234 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
31235 Tor to fail to start if you had it configured to use a bridge
31236 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
31237 - When extending a circuit to a hidden service directory to upload a
31238 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
31239 requests failed, because the router descriptor had not been
31240 downloaded yet. In these cases, we now wait until the router
31241 descriptor is downloaded, and then retry. Likewise, clients
31242 now skip over a hidden service directory if they don't yet have
31243 its router descriptor, rather than futilely requesting it and
31244 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
31246 - When fetching v0 and v2 rendezvous service descriptors in parallel,
31247 we were failing the whole hidden service request when the v0
31248 descriptor fetch fails, even if the v2 fetch is still pending and
31249 might succeed. Similarly, if the last v2 fetch fails, we were
31250 failing the whole hidden service request even if a v0 fetch is
31251 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
31252 - DNS replies need to have names matching their requests, but
31253 these names should be in the questions section, not necessarily
31254 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
31257 - Update to the "September 1 2008" ip-to-country file.
31258 - Allow ports 465 and 587 in the default exit policy again. We had
31259 rejected them in 0.1.0.15, because back in 2005 they were commonly
31260 misconfigured and ended up as spam targets. We hear they are better
31261 locked down these days.
31262 - Use a lockfile to make sure that two Tor processes are not
31263 simultaneously running with the same datadir.
31264 - Serve the latest v3 networkstatus consensus via the control
31265 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
31266 - Better logging about stability/reliability calculations on directory
31268 - Drop the requirement to have an open dir port for storing and
31269 serving v2 hidden service descriptors.
31270 - Directory authorities now serve a /tor/dbg-stability.txt URL to
31271 help debug WFU and MTBF calculations.
31272 - Implement most of Proposal 152: allow specialized servers to permit
31273 single-hop circuits, and clients to use those servers to build
31274 single-hop circuits when using a specialized controller. Patch
31275 from Josh Albrecht. Resolves feature request 768.
31276 - Add a -p option to tor-resolve for specifying the SOCKS port: some
31277 people find host:port too confusing.
31278 - Make TrackHostExit mappings expire a while after their last use, not
31279 after their creation. Patch from Robert Hogan.
31280 - Provide circuit purposes along with circuit events to the controller.
31283 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
31285 - Fixed some memory leaks -- some quite frequent, some almost
31286 impossible to trigger -- based on results from Coverity.
31287 - When testing for libevent functions, set the LDFLAGS variable
31288 correctly. Found by Riastradh.
31289 - Fix an assertion bug in parsing policy-related options; possible fix
31291 - Catch and report a few more bootstrapping failure cases when Tor
31292 fails to establish a TCP connection. Cleanup on 0.2.1.x.
31293 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
31294 bootstrapping with tunneled directory connections. Bugfix on
31295 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
31296 - When asked to connect to A.B.exit:80, if we don't know the IP for A
31297 and we know that server B rejects most-but-not all connections to
31298 port 80, we would previously reject the connection. Now, we assume
31299 the user knows what they were asking for. Fixes bug 752. Bugfix
31300 on 0.0.9rc5. Diagnosed by BarkerJr.
31301 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
31302 service directories if they have no advertised dir port. Bugfix
31304 - If we overrun our per-second write limits a little, count this as
31305 having used up our write allocation for the second, and choke
31306 outgoing directory writes. Previously, we had only counted this when
31307 we had met our limits precisely. Fixes bug 824. Patch by rovv.
31308 Bugfix on 0.2.0.x (??).
31309 - Avoid a "0 divided by 0" calculation when calculating router uptime
31310 at directory authorities. Bugfix on 0.2.0.8-alpha.
31311 - Make DNS resolved controller events into "CLOSED", not
31312 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
31314 - Fix a bug where an unreachable relay would establish enough
31315 reachability testing circuits to do a bandwidth test -- if
31316 we already have a connection to the middle hop of the testing
31317 circuit, then it could establish the last hop by using the existing
31318 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
31319 circuits no longer use entry guards in 0.2.1.3-alpha.
31320 - If we have correct permissions on $datadir, we complain to stdout
31321 and fail to start. But dangerous permissions on
31322 $datadir/cached-status/ would cause us to open a log and complain
31323 there. Now complain to stdout and fail to start in both cases. Fixes
31324 bug 820, reported by seeess.
31325 - Remove the old v2 directory authority 'lefkada' from the default
31326 list. It has been gone for many months.
31328 o Code simplifications and refactoring:
31329 - Revise the connection_new functions so that a more typesafe variant
31330 exists. This will work better with Coverity, and let us find any
31331 actual mistakes we're making here.
31332 - Refactor unit testing logic so that dmalloc can be used sensibly
31333 with unit tests to check for memory leaks.
31334 - Move all hidden-service related fields from connection and circuit
31335 structure to substructures: this way they won't eat so much memory.
31338 Changes in version 0.2.0.31 - 2008-09-03
31339 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
31340 a big bug we're seeing where in rare cases traffic from one Tor stream
31341 gets mixed into another stream, and fixes a variety of smaller issues.
31344 - Make sure that two circuits can never exist on the same connection
31345 with the same circuit ID, even if one is marked for close. This
31346 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
31347 - Relays now reject risky extend cells: if the extend cell includes
31348 a digest of all zeroes, or asks to extend back to the relay that
31349 sent the extend cell, tear down the circuit. Ideas suggested
31351 - If not enough of our entry guards are available so we add a new
31352 one, we might use the new one even if it overlapped with the
31353 current circuit's exit relay (or its family). Anonymity bugfix
31354 pointed out by rovv.
31357 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
31358 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
31359 - Correctly detect the presence of the linux/netfilter_ipv4.h header
31360 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
31361 - Pick size of default geoip filename string correctly on windows.
31362 Fixes bug 806. Bugfix on 0.2.0.30.
31363 - Make the autoconf script accept the obsolete --with-ssl-dir
31364 option as an alias for the actually-working --with-openssl-dir
31365 option. Fix the help documentation to recommend --with-openssl-dir.
31366 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
31367 - When using the TransPort option on OpenBSD, and using the User
31368 option to change UID and drop privileges, make sure to open
31369 /dev/pf before dropping privileges. Fixes bug 782. Patch from
31370 Christopher Davis. Bugfix on 0.1.2.1-alpha.
31371 - Try to attach connections immediately upon receiving a RENDEZVOUS2
31372 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
31373 on the client side when connecting to a hidden service. Bugfix
31374 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
31375 - When closing an application-side connection because its circuit is
31376 getting torn down, generate the stream event correctly. Bugfix on
31377 0.1.2.x. Anonymous patch.
31380 Changes in version 0.2.1.5-alpha - 2008-08-31
31381 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
31382 in a lot of the infrastructure for adding authorization to hidden
31383 services, lays the groundwork for having clients read their load
31384 balancing information out of the networkstatus consensus rather than
31385 the individual router descriptors, addresses two potential anonymity
31386 issues, and fixes a variety of smaller issues.
31389 - Convert many internal address representations to optionally hold
31391 - Generate and accept IPv6 addresses in many protocol elements.
31392 - Make resolver code handle nameservers located at ipv6 addresses.
31393 - Begin implementation of proposal 121 ("Client authorization for
31394 hidden services"): configure hidden services with client
31395 authorization, publish descriptors for them, and configure
31396 authorization data for hidden services at clients. The next
31397 step is to actually access hidden services that perform client
31399 - More progress toward proposal 141: Network status consensus
31400 documents and votes now contain bandwidth information for each
31401 router and a summary of that router's exit policy. Eventually this
31402 will be used by clients so that they do not have to download every
31403 known descriptor before building circuits.
31405 o Major bugfixes (on 0.2.0.x and before):
31406 - When sending CREATED cells back for a given circuit, use a 64-bit
31407 connection ID to find the right connection, rather than an addr:port
31408 combination. Now that we can have multiple OR connections between
31409 the same ORs, it is no longer possible to use addr:port to uniquely
31410 identify a connection.
31411 - Relays now reject risky extend cells: if the extend cell includes
31412 a digest of all zeroes, or asks to extend back to the relay that
31413 sent the extend cell, tear down the circuit. Ideas suggested
31415 - If not enough of our entry guards are available so we add a new
31416 one, we might use the new one even if it overlapped with the
31417 current circuit's exit relay (or its family). Anonymity bugfix
31418 pointed out by rovv.
31421 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
31422 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
31423 - When using the TransPort option on OpenBSD, and using the User
31424 option to change UID and drop privileges, make sure to open /dev/pf
31425 before dropping privileges. Fixes bug 782. Patch from Christopher
31426 Davis. Bugfix on 0.1.2.1-alpha.
31427 - Correctly detect the presence of the linux/netfilter_ipv4.h header
31428 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
31429 - Add a missing safe_str() call for a debug log message.
31430 - Use 64 bits instead of 32 bits for connection identifiers used with
31431 the controller protocol, to greatly reduce risk of identifier reuse.
31432 - Make the autoconf script accept the obsolete --with-ssl-dir
31433 option as an alias for the actually-working --with-openssl-dir
31434 option. Fix the help documentation to recommend --with-openssl-dir.
31435 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
31438 - Rate-limit too-many-sockets messages: when they happen, they happen
31439 a lot. Resolves bug 748.
31440 - Resist DNS poisoning a little better by making sure that names in
31441 answer sections match.
31442 - Print the SOCKS5 error message string as well as the error code
31443 when a tor-resolve request fails. Patch from Jacob.
31446 Changes in version 0.2.1.4-alpha - 2008-08-04
31447 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
31450 - The address part of exit policies was not correctly written
31451 to router descriptors. This generated router descriptors that failed
31452 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
31454 - Tor triggered a false assert when extending a circuit to a relay
31455 but we already have a connection open to that relay. Noticed by
31456 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
31459 - Fix a hidden service logging bug: in some edge cases, the router
31460 descriptor of a previously picked introduction point becomes
31461 obsolete and we need to give up on it rather than continually
31462 complaining that it has become obsolete. Observed by xiando. Bugfix
31465 o Removed features:
31466 - Take out the TestVia config option, since it was a workaround for
31467 a bug that was fixed in Tor 0.1.1.21.
31470 Changes in version 0.2.1.3-alpha - 2008-08-03
31471 Tor 0.2.1.3-alpha implements most of the pieces to prevent
31472 infinite-length circuit attacks (see proposal 110); fixes a bug that
31473 might cause exit relays to corrupt streams they send back; allows
31474 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
31475 ExcludeExitNodes config options; and fixes a big pile of bugs.
31477 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
31478 - Send a bootstrap problem "warn" event on the first problem if the
31479 reason is NO_ROUTE (that is, our network is down).
31482 - Implement most of proposal 110: The first K cells to be sent
31483 along a circuit are marked as special "early" cells; only K "early"
31484 cells will be allowed. Once this code is universal, we can block
31485 certain kinds of DOS attack by requiring that EXTEND commands must
31486 be sent using an "early" cell.
31489 - Try to attach connections immediately upon receiving a RENDEZVOUS2
31490 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
31491 on the client side when connecting to a hidden service. Bugfix
31492 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
31493 - Ensure that two circuits can never exist on the same connection
31494 with the same circuit ID, even if one is marked for close. This
31495 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
31498 - When relays do their initial bandwidth measurement, don't limit
31499 to just our entry guards for the test circuits. Otherwise we tend
31500 to have multiple test circuits going through a single entry guard,
31501 which makes our bandwidth test less accurate. Fixes part of bug 654;
31502 patch contributed by Josh Albrecht.
31503 - Add an ExcludeExitNodes option so users can list a set of nodes
31504 that should be be excluded from the exit node position, but
31505 allowed elsewhere. Implements proposal 151.
31506 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
31507 ExcludeNodes and ExcludeExitNodes lists.
31508 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
31509 be more efficient. Formerly it was quadratic in the number of
31510 servers; now it should be linear. Fixes bug 509.
31511 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
31512 and n_conn_id_digest fields into a separate structure that's
31513 only needed when the circuit has not yet attached to an n_conn.
31516 - Change the contrib/tor.logrotate script so it makes the new
31517 logs as "_tor:_tor" rather than the default, which is generally
31518 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
31519 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
31520 warnings (occasionally), but it can also cause the compiler to
31521 eliminate error-checking code. Suggested by Peter Gutmann.
31522 - When a hidden service is giving up on an introduction point candidate
31523 that was not included in the last published rendezvous descriptor,
31524 don't reschedule publication of the next descriptor. Fixes bug 763.
31526 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
31527 HiddenServiceExcludeNodes as obsolete: they never worked properly,
31528 and nobody claims to be using them. Fixes bug 754. Bugfix on
31529 0.1.0.1-rc. Patch from Christian Wilms.
31530 - Fix a small alignment and memory-wasting bug on buffer chunks.
31533 o Minor bugfixes (controller):
31534 - When closing an application-side connection because its circuit
31535 is getting torn down, generate the stream event correctly.
31536 Bugfix on 0.1.2.x. Anonymous patch.
31538 o Removed features:
31539 - Remove all backward-compatibility code to support relays running
31540 versions of Tor so old that they no longer work at all on the
31544 Changes in version 0.2.0.30 - 2008-07-15
31546 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
31547 warnings (occasionally), but it can also cause the compiler to
31548 eliminate error-checking code. Suggested by Peter Gutmann.
31551 Changes in version 0.2.0.29-rc - 2008-07-08
31552 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
31553 hidden-service performance bugs, and fixes a bunch of smaller bugs.
31556 - If you have more than one bridge but don't know their keys,
31557 you would only launch a request for the descriptor of the first one
31558 on your list. (Tor considered launching requests for the others, but
31559 found that it already had a connection on the way for $0000...0000
31560 so it didn't open another.) Bugfix on 0.2.0.x.
31561 - If you have more than one bridge but don't know their keys, and the
31562 connection to one of the bridges failed, you would cancel all
31563 pending bridge connections. (After all, they all have the same
31564 digest.) Bugfix on 0.2.0.x.
31565 - When a hidden service was trying to establish an introduction point,
31566 and Tor had built circuits preemptively for such purposes, we
31567 were ignoring all the preemptive circuits and launching a new one
31568 instead. Bugfix on 0.2.0.14-alpha.
31569 - When a hidden service was trying to establish an introduction point,
31570 and Tor *did* manage to reuse one of the preemptively built
31571 circuits, it didn't correctly remember which one it used,
31572 so it asked for another one soon after, until there were no
31573 more preemptive circuits, at which point it launched one from
31574 scratch. Bugfix on 0.0.9.x.
31575 - Make directory servers include the X-Your-Address-Is: http header in
31576 their responses even for begin_dir conns. Now clients who only
31577 ever use begin_dir connections still have a way to learn their IP
31578 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
31581 - Fix a macro/CPP interaction that was confusing some compilers:
31582 some GCCs don't like #if/#endif pairs inside macro arguments.
31584 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
31585 Fixes bug 704; fix from Steven Murdoch.
31586 - When opening /dev/null in finish_daemonize(), do not pass the
31587 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
31588 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
31589 - Correctly detect transparent proxy support on Linux hosts that
31590 require in.h to be included before netfilter_ipv4.h. Patch
31592 - Disallow session resumption attempts during the renegotiation
31593 stage of the v2 handshake protocol. Clients should never be trying
31594 session resumption at this point, but apparently some did, in
31595 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
31596 found by Geoff Goodell.
31599 Changes in version 0.2.1.2-alpha - 2008-06-20
31600 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
31601 make it easier to set up your own private Tor network; fixes several
31602 big bugs with using more than one bridge relay; fixes a big bug with
31603 offering hidden services quickly after Tor starts; and uses a better
31604 API for reporting potential bootstrapping problems to the controller.
31607 - New TestingTorNetwork config option to allow adjustment of
31608 previously constant values that, while reasonable, could slow
31609 bootstrapping. Implements proposal 135. Patch from Karsten.
31612 - If you have more than one bridge but don't know their digests,
31613 you would only learn a request for the descriptor of the first one
31614 on your list. (Tor considered launching requests for the others, but
31615 found that it already had a connection on the way for $0000...0000
31616 so it didn't open another.) Bugfix on 0.2.0.x.
31617 - If you have more than one bridge but don't know their digests,
31618 and the connection to one of the bridges failed, you would cancel
31619 all pending bridge connections. (After all, they all have the
31620 same digest.) Bugfix on 0.2.0.x.
31621 - When establishing a hidden service, introduction points that
31622 originate from cannibalized circuits are completely ignored and not
31623 included in rendezvous service descriptors. This might be another
31624 reason for delay in making a hidden service available. Bugfix
31625 from long ago (0.0.9.x?)
31628 - Allow OpenSSL to use dynamic locks if it wants.
31629 - When building a consensus, do not include routers that are down.
31630 This will cut down 30% to 40% on consensus size. Implements
31632 - In directory authorities' approved-routers files, allow
31633 fingerprints with or without space.
31634 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
31635 controller can query our current bootstrap state in case it attaches
31636 partway through and wants to catch up.
31637 - Send an initial "Starting" bootstrap status event, so we have a
31638 state to start out in.
31641 - Asking for a conditional consensus at .../consensus/<fingerprints>
31642 would crash a dirserver if it did not already have a
31643 consensus. Bugfix on 0.2.1.1-alpha.
31644 - Clean up some macro/CPP interactions: some GCC versions don't like
31645 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
31648 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
31649 - Directory authorities shouldn't complain about bootstrapping
31650 problems just because they do a lot of reachability testing and
31651 some of the connection attempts fail.
31652 - Start sending "count" and "recommendation" key/value pairs in
31653 bootstrap problem status events, so the controller can hear about
31654 problems even before Tor decides they're worth reporting for sure.
31655 - If you're using bridges, generate "bootstrap problem" warnings
31656 as soon as you run out of working bridges, rather than waiting
31657 for ten failures -- which will never happen if you have less than
31659 - If we close our OR connection because there's been a circuit
31660 pending on it for too long, we were telling our bootstrap status
31661 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
31664 Changes in version 0.2.1.1-alpha - 2008-06-13
31665 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
31666 were making the Tor process bloat especially on Linux; makes our TLS
31667 handshake blend in better; sends "bootstrap phase" status events to
31668 the controller, so it can keep the user informed of progress (and
31669 problems) fetching directory information and establishing circuits;
31670 and adds a variety of smaller features.
31673 - More work on making our TLS handshake blend in: modify the list
31674 of ciphers advertised by OpenSSL in client mode to even more
31675 closely resemble a common web browser. We cheat a little so that
31676 we can advertise ciphers that the locally installed OpenSSL doesn't
31678 - Start sending "bootstrap phase" status events to the controller,
31679 so it can keep the user informed of progress fetching directory
31680 information and establishing circuits. Also inform the controller
31681 if we think we're stuck at a particular bootstrap phase. Implements
31683 - Resume using OpenSSL's RAND_poll() for better (and more portable)
31684 cross-platform entropy collection again. We used to use it, then
31685 stopped using it because of a bug that could crash systems that
31686 called RAND_poll when they had a lot of fds open. It looks like the
31687 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
31688 at startup, and to call RAND_poll() when we reseed later only if
31689 we have a non-buggy OpenSSL version.
31692 - When we choose to abandon a new entry guard because we think our
31693 older ones might be better, close any circuits pending on that
31694 new entry guard connection. This fix should make us recover much
31695 faster when our network is down and then comes back. Bugfix on
31696 0.1.2.8-beta; found by lodger.
31698 o Memory fixes and improvements:
31699 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
31700 to avoid unused RAM in buffer chunks and memory pools.
31701 - Speed up parsing and cut down on memory fragmentation by using
31702 stack-style allocations for parsing directory objects. Previously,
31703 this accounted for over 40% of allocations from within Tor's code
31704 on a typical directory cache.
31705 - Use a Bloom filter rather than a digest-based set to track which
31706 descriptors we need to keep around when we're cleaning out old
31707 router descriptors. This speeds up the computation significantly,
31708 and may reduce fragmentation.
31709 - Reduce the default smartlist size from 32 to 16; it turns out that
31710 most smartlists hold around 8-12 elements tops.
31711 - Make dumpstats() log the fullness and size of openssl-internal
31713 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
31714 patch to their OpenSSL, turn it on to save memory on servers. This
31715 patch will (with any luck) get included in a mainline distribution
31717 - Never use OpenSSL compression: it wastes RAM and CPU trying to
31718 compress cells, which are basically all encrypted, compressed,
31722 - Stop reloading the router list from disk for no reason when we
31723 run out of reachable directory mirrors. Once upon a time reloading
31724 it would set the 'is_running' flag back to 1 for them. It hasn't
31725 done that for a long time.
31726 - In very rare situations new hidden service descriptors were
31727 published earlier than 30 seconds after the last change to the
31728 service. (We currently think that a hidden service descriptor
31729 that's been stable for 30 seconds is worth publishing.)
31732 - Allow separate log levels to be configured for different logging
31733 domains. For example, this allows one to log all notices, warnings,
31734 or errors, plus all memory management messages of level debug or
31735 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
31736 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
31737 and stop using a warning that had become unfixably verbose under
31739 - New --hush command-line option similar to --quiet. While --quiet
31740 disables all logging to the console on startup, --hush limits the
31741 output to messages of warning and error severity.
31742 - Servers support a new URL scheme for consensus downloads that
31743 allows the client to specify which authorities are trusted.
31744 The server then only sends the consensus if the client will trust
31745 it. Otherwise a 404 error is sent back. Clients use this
31746 new scheme when the server supports it (meaning it's running
31747 0.2.1.1-alpha or later). Implements proposal 134.
31748 - New configure/torrc options (--enable-geoip-stats,
31749 DirRecordUsageByCountry) to record how many IPs we've served
31750 directory info to in each country code, how many status documents
31751 total we've sent to each country code, and what share of the total
31752 directory requests we should expect to see.
31753 - Use the TLS1 hostname extension to more closely resemble browser
31755 - Lots of new unit tests.
31756 - Add a macro to implement the common pattern of iterating through
31757 two parallel lists in lockstep.
31760 Changes in version 0.2.0.28-rc - 2008-06-13
31761 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
31762 performance bug, and fixes a bunch of smaller bugs.
31765 - Fix a bug where, when we were choosing the 'end stream reason' to
31766 put in our relay end cell that we send to the exit relay, Tor
31767 clients on Windows were sometimes sending the wrong 'reason'. The
31768 anonymity problem is that exit relays may be able to guess whether
31769 the client is running Windows, thus helping partition the anonymity
31770 set. Down the road we should stop sending reasons to exit relays,
31771 or otherwise prevent future versions of this bug.
31774 - While setting up a hidden service, some valid introduction circuits
31775 were overlooked and abandoned. This might be the reason for
31776 the long delay in making a hidden service available. Bugfix on
31780 - Update to the "June 9 2008" ip-to-country file.
31781 - Run 'make test' as part of 'make dist', so we stop releasing so
31782 many development snapshots that fail their unit tests.
31785 - When we're checking if we have enough dir info for each relay
31786 to begin establishing circuits, make sure that we actually have
31787 the descriptor listed in the consensus, not just any descriptor.
31789 - Bridge relays no longer print "xx=0" in their extrainfo document
31790 for every single country code in the geoip db. Bugfix on
31792 - Only warn when we fail to load the geoip file if we were planning to
31793 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
31794 - If we change our MaxAdvertisedBandwidth and then reload torrc,
31795 Tor won't realize it should publish a new relay descriptor. Fixes
31796 bug 688, reported by mfr. Bugfix on 0.1.2.x.
31797 - When we haven't had any application requests lately, don't bother
31798 logging that we have expired a bunch of descriptors. Bugfix
31800 - Make relay cells written on a connection count as non-padding when
31801 tracking how long a connection has been in use. Bugfix on
31802 0.2.0.1-alpha. Spotted by lodger.
31803 - Fix unit tests in 0.2.0.27-rc.
31804 - Fix compile on Windows.
31807 Changes in version 0.2.0.27-rc - 2008-06-03
31808 Tor 0.2.0.27-rc adds a few features we left out of the earlier
31809 release candidates. In particular, we now include an IP-to-country
31810 GeoIP database, so controllers can easily look up what country a
31811 given relay is in, and so bridge relays can give us some sanitized
31812 summaries about which countries are making use of bridges. (See proposal
31813 126-geoip-fetching.txt for details.)
31816 - Include an IP-to-country GeoIP file in the tarball, so bridge
31817 relays can report sanitized summaries of the usage they're seeing.
31820 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
31821 Robert Hogan. Fixes the first part of bug 681.
31822 - Make bridge authorities never serve extrainfo docs.
31823 - Add support to detect Libevent versions in the 1.4.x series
31825 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
31826 - Include a new contrib/tor-exit-notice.html file that exit relay
31827 operators can put on their website to help reduce abuse queries.
31830 - When tunneling an encrypted directory connection, and its first
31831 circuit fails, do not leave it unattached and ask the controller
31832 to deal. Fixes the second part of bug 681.
31833 - Make bridge authorities correctly expire old extrainfo documents
31837 Changes in version 0.2.0.26-rc - 2008-05-13
31838 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
31839 in Debian's OpenSSL packages. All users running any 0.2.0.x version
31840 should upgrade, whether they're running Debian or not.
31842 o Major security fixes:
31843 - Use new V3 directory authority keys on the tor26, gabelmoo, and
31844 moria1 V3 directory authorities. The old keys were generated with
31845 a vulnerable version of Debian's OpenSSL package, and must be
31846 considered compromised. Other authorities' keys were not generated
31847 with an affected version of OpenSSL.
31850 - List authority signatures as "unrecognized" based on DirServer
31851 lines, not on cert cache. Bugfix on 0.2.0.x.
31854 - Add a new V3AuthUseLegacyKey option to make it easier for
31855 authorities to change their identity keys if they have to.
31858 Changes in version 0.2.0.25-rc - 2008-04-23
31859 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
31862 - Remember to initialize threading before initializing logging.
31863 Otherwise, many BSD-family implementations will crash hard on
31864 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
31867 - Authorities correctly free policies on bad servers on
31868 exit. Fixes bug 672. Bugfix on 0.2.0.x.
31871 Changes in version 0.2.0.24-rc - 2008-04-22
31872 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
31873 v3 directory authority, makes relays with dynamic IP addresses and no
31874 DirPort notice more quickly when their IP address changes, fixes a few
31875 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
31877 o New directory authorities:
31878 - Take lefkada out of the list of v3 directory authorities, since
31879 it has been down for months.
31880 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
31884 - Detect address changes more quickly on non-directory mirror
31885 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
31887 o Minor features (security):
31888 - Reject requests for reverse-dns lookup of names that are in
31889 a private address space. Patch from lodger.
31890 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
31893 o Minor bugfixes (crashes):
31894 - Avoid a rare assert that can trigger when Tor doesn't have much
31895 directory information yet and it tries to fetch a v2 hidden
31896 service descriptor. Fixes bug 651, reported by nwf.
31897 - Initialize log mutex before initializing dmalloc. Otherwise,
31898 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
31899 - Use recursive pthread mutexes in order to avoid deadlock when
31900 logging debug-level messages to a controller. Bug spotted by nwf,
31901 bugfix on 0.2.0.16-alpha.
31903 o Minor bugfixes (resource management):
31904 - Keep address policies from leaking memory: start their refcount
31905 at 1, not 2. Bugfix on 0.2.0.16-alpha.
31906 - Free authority certificates on exit, so they don't look like memory
31907 leaks. Bugfix on 0.2.0.19-alpha.
31908 - Free static hashtables for policy maps and for TLS connections on
31909 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
31910 - Avoid allocating extra space when computing consensuses on 64-bit
31911 platforms. Bug spotted by aakova.
31913 o Minor bugfixes (misc):
31914 - Do not read the configuration file when we've only been told to
31915 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
31916 based on patch from Sebastian Hahn.
31917 - Exit relays that are used as a client can now reach themselves
31918 using the .exit notation, rather than just launching an infinite
31919 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
31920 - When attempting to open a logfile fails, tell us why.
31921 - Fix a dumb bug that was preventing us from knowing that we should
31922 preemptively build circuits to handle expected directory requests.
31923 Fixes bug 660. Bugfix on 0.1.2.x.
31924 - Warn less verbosely about clock skew from netinfo cells from
31925 untrusted sources. Fixes bug 663.
31926 - Make controller stream events for DNS requests more consistent,
31927 by adding "new stream" events for DNS requests, and removing
31928 spurious "stream closed" events" for cached reverse resolves.
31929 Patch from mwenge. Fixes bug 646.
31930 - Correctly notify one-hop connections when a circuit build has
31931 failed. Possible fix for bug 669. Found by lodger.
31934 Changes in version 0.2.0.23-rc - 2008-03-24
31935 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
31936 makes bootstrapping faster if the first directory mirror you contact
31937 is down. The bundles also include the new Vidalia 0.1.2 release.
31940 - When a tunneled directory request is made to a directory server
31941 that's down, notice after 30 seconds rather than 120 seconds. Also,
31942 fail any begindir streams that are pending on it, so they can
31943 retry elsewhere. This was causing multi-minute delays on bootstrap.
31946 Changes in version 0.2.0.22-rc - 2008-03-18
31947 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
31948 enables encrypted directory connections by default for non-relays, fixes
31949 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
31950 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
31953 - Enable encrypted directory connections by default for non-relays,
31954 so censor tools that block Tor directory connections based on their
31955 plaintext patterns will no longer work. This means Tor works in
31956 certain censored countries by default again.
31959 - Make sure servers always request certificates from clients during
31960 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
31961 - Do not enter a CPU-eating loop when a connection is closed in
31962 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
31963 diagnosed by lodger; bugfix on 0.2.0.20-rc.
31964 - Fix assertion failure that could occur when a blocked circuit
31965 became unblocked, and it had pending client DNS requests. Bugfix
31966 on 0.2.0.1-alpha. Fixes bug 632.
31968 o Minor bugfixes (on 0.1.2.x):
31969 - Generate "STATUS_SERVER" events rather than misspelled
31970 "STATUS_SEVER" events. Caught by mwenge.
31971 - When counting the number of bytes written on a TLS connection,
31972 look at the BIO actually used for writing to the network, not
31973 at the BIO used (sometimes) to buffer data for the network.
31974 Looking at different BIOs could result in write counts on the
31975 order of ULONG_MAX. Fixes bug 614.
31976 - On Windows, correctly detect errors when listing the contents of
31977 a directory. Fix from lodger.
31979 o Minor bugfixes (on 0.2.0.x):
31980 - Downgrade "sslv3 alert handshake failure" message to INFO.
31981 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
31982 left BandwidthRate and BandwidthBurst at the default, we would be
31983 silently limited by those defaults. Now raise them to match the
31984 RelayBandwidth* values.
31985 - Fix the SVK version detection logic to work correctly on a branch.
31986 - Make --enable-openbsd-malloc work correctly on Linux with alpha
31987 CPUs. Fixes bug 625.
31988 - Logging functions now check that the passed severity is sane.
31989 - Use proper log levels in the testsuite call of
31990 get_interface_address6().
31991 - When using a nonstandard malloc, do not use the platform values for
31992 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
31993 - Make the openbsd malloc code use 8k pages on alpha CPUs and
31995 - Detect mismatched page sizes when using --enable-openbsd-malloc.
31996 - Avoid double-marked-for-close warning when certain kinds of invalid
31997 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
31998 for bug 617. Bugfix on 0.2.0.1-alpha.
31999 - Make sure that the "NULL-means-reject *:*" convention is followed by
32000 all the policy manipulation functions, avoiding some possible crash
32001 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
32002 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
32003 actually works, and doesn't warn about every single reverse lookup.
32004 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
32007 - Only log guard node status when guard node status has changed.
32008 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
32009 make "INFO" 75% less verbose.
32012 Changes in version 0.2.0.21-rc - 2008-03-02
32013 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
32014 makes Tor work well with Vidalia again, fixes a rare assert bug,
32015 and fixes a pair of more minor bugs. The bundles also include Vidalia
32016 0.1.0 and Torbutton 1.1.16.
32019 - The control port should declare that it requires password auth
32020 when HashedControlSessionPassword is set too. Patch from Matt Edman;
32021 bugfix on 0.2.0.20-rc. Fixes bug 615.
32022 - Downgrade assert in connection_buckets_decrement() to a log message.
32023 This may help us solve bug 614, and in any case will make its
32024 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
32025 - We were sometimes miscounting the number of bytes read from the
32026 network, causing our rate limiting to not be followed exactly.
32027 Bugfix on 0.2.0.16-alpha. Reported by lodger.
32030 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
32031 OpenSSL versions should have been working fine. Diagnosis and patch
32032 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
32033 Bugfix on 0.2.0.20-rc.
32036 Changes in version 0.2.0.20-rc - 2008-02-24
32037 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
32038 makes more progress towards normalizing Tor's TLS handshake, makes
32039 hidden services work better again, helps relays bootstrap if they don't
32040 know their IP address, adds optional support for linking in openbsd's
32041 allocator or tcmalloc, allows really fast relays to scale past 15000
32042 sockets, and fixes a bunch of minor bugs reported by Veracode.
32045 - Enable the revised TLS handshake based on the one designed by
32046 Steven Murdoch in proposal 124, as revised in proposal 130. It
32047 includes version negotiation for OR connections as described in
32048 proposal 105. The new handshake is meant to be harder for censors
32049 to fingerprint, and it adds the ability to detect certain kinds of
32050 man-in-the-middle traffic analysis attacks. The version negotiation
32051 feature will allow us to improve Tor's link protocol more safely
32053 - Choose which bridge to use proportional to its advertised bandwidth,
32054 rather than uniformly at random. This should speed up Tor for
32055 bridge users. Also do this for people who set StrictEntryNodes.
32056 - When a TrackHostExits-chosen exit fails too many times in a row,
32057 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
32060 - Resolved problems with (re-)fetching hidden service descriptors.
32061 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
32062 and 0.2.0.19-alpha.
32063 - If we only ever used Tor for hidden service lookups or posts, we
32064 would stop building circuits and start refusing connections after
32065 24 hours, since we falsely believed that Tor was dormant. Reported
32066 by nwf; bugfix on 0.1.2.x.
32067 - Servers that don't know their own IP address should go to the
32068 authorities for their first directory fetch, even if their DirPort
32069 is off or if they don't know they're reachable yet. This will help
32070 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
32071 - When counting the number of open sockets, count not only the number
32072 of sockets we have received from the socket() call, but also
32073 the number we've gotten from accept() and socketpair(). This bug
32074 made us fail to count all sockets that we were using for incoming
32075 connections. Bugfix on 0.2.0.x.
32076 - Fix code used to find strings within buffers, when those strings
32077 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
32078 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
32079 - Add a new __HashedControlSessionPassword option for controllers
32080 to use for one-off session password hashes that shouldn't get
32081 saved to disk by SAVECONF --- Vidalia users were accumulating a
32082 pile of HashedControlPassword lines in their torrc files, one for
32083 each time they had restarted Tor and then clicked Save. Make Tor
32084 automatically convert "HashedControlPassword" to this new option but
32085 only when it's given on the command line. Partial fix for bug 586.
32087 o Minor features (performance):
32088 - Tune parameters for cell pool allocation to minimize amount of
32090 - Add OpenBSD malloc code from phk as an optional malloc
32091 replacement on Linux: some glibc libraries do very poorly
32092 with Tor's memory allocation patterns. Pass
32093 --enable-openbsd-malloc to get the replacement malloc code.
32094 - Add a --with-tcmalloc option to the configure script to link
32095 against tcmalloc (if present). Does not yet search for
32096 non-system include paths.
32097 - Stop imposing an arbitrary maximum on the number of file descriptors
32098 used for busy servers. Bug reported by Olaf Selke; patch from
32101 o Minor features (other):
32102 - When SafeLogging is disabled, log addresses along with all TLS
32104 - When building with --enable-gcc-warnings, check for whether Apple's
32105 warning "-Wshorten-64-to-32" is available.
32106 - Add a --passphrase-fd argument to the tor-gencert command for
32109 o Minor bugfixes (memory leaks and code problems):
32110 - We were leaking a file descriptor if Tor started with a zero-length
32111 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
32112 - Detect size overflow in zlib code. Reported by Justin Ferguson and
32114 - We were comparing the raw BridgePassword entry with a base64'ed
32115 version of it, when handling a "/tor/networkstatus-bridges"
32116 directory request. Now compare correctly. Noticed by Veracode.
32117 - Recover from bad tracked-since value in MTBF-history file.
32118 Should fix bug 537.
32119 - Alter the code that tries to recover from unhandled write
32120 errors, to not try to flush onto a socket that's given us
32121 unhandled errors. Bugfix on 0.1.2.x.
32122 - Make Unix controlsockets work correctly on OpenBSD. Patch from
32123 tup. Bugfix on 0.2.0.3-alpha.
32125 o Minor bugfixes (other):
32126 - If we have an extra-info document for our server, always make
32127 it available on the control port, even if we haven't gotten
32128 a copy of it from an authority yet. Patch from mwenge.
32129 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
32130 - Directory mirrors no longer include a guess at the client's IP
32131 address if the connection appears to be coming from the same /24
32132 network; it was producing too many wrong guesses.
32133 - Make the new hidden service code respect the SafeLogging setting.
32134 Bugfix on 0.2.0.x. Patch from Karsten.
32135 - When starting as an authority, do not overwrite all certificates
32136 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
32137 - If we're trying to flush the last bytes on a connection (for
32138 example, when answering a directory request), reset the
32139 time-to-give-up timeout every time we manage to write something
32140 on the socket. Bugfix on 0.1.2.x.
32141 - Change the behavior of "getinfo status/good-server-descriptor"
32142 so it doesn't return failure when any authority disappears.
32143 - Even though the man page said that "TrackHostExits ." should
32144 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
32145 - Report TLS "zero return" case as a "clean close" and "IO error"
32146 as a "close". Stop calling closes "unexpected closes": existing
32147 Tors don't use SSL_close(), so having a connection close without
32148 the TLS shutdown handshake is hardly unexpected.
32149 - Send NAMESERVER_STATUS messages for a single failed nameserver
32152 o Code simplifications and refactoring:
32153 - Remove the tor_strpartition function: its logic was confused,
32154 and it was only used for one thing that could be implemented far
32158 Changes in version 0.2.0.19-alpha - 2008-02-09
32159 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
32160 handshake, makes path selection for relays more secure and IP address
32161 guessing more robust, and generally fixes a lot of bugs in preparation
32162 for calling the 0.2.0 branch stable.
32165 - Do not include recognizeable strings in the commonname part of
32166 Tor's x509 certificates.
32169 - If we're a relay, avoid picking ourselves as an introduction point,
32170 a rendezvous point, or as the final hop for internal circuits. Bug
32171 reported by taranis and lodger. Bugfix on 0.1.2.x.
32172 - Patch from "Andrew S. Lists" to catch when we contact a directory
32173 mirror at IP address X and he says we look like we're coming from
32174 IP address X. Bugfix on 0.1.2.x.
32176 o Minor features (security):
32177 - Be more paranoid about overwriting sensitive memory on free(),
32178 as a defensive programming tactic to ensure forward secrecy.
32180 o Minor features (directory authority):
32181 - Actually validate the options passed to AuthDirReject,
32182 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
32183 - Reject router descriptors with out-of-range bandwidthcapacity or
32184 bandwidthburst values.
32186 o Minor features (controller):
32187 - Reject controller commands over 1MB in length. This keeps rogue
32188 processes from running us out of memory.
32190 o Minor features (misc):
32191 - Give more descriptive well-formedness errors for out-of-range
32192 hidden service descriptor/protocol versions.
32193 - Make memory debugging information describe more about history
32194 of cell allocation, so we can help reduce our memory use.
32196 o Deprecated features (controller):
32197 - The status/version/num-versioning and status/version/num-concurring
32198 GETINFO options are no longer useful in the v3 directory protocol:
32199 treat them as deprecated, and warn when they're used.
32202 - When our consensus networkstatus has been expired for a while, stop
32203 being willing to build circuits using it. Fixes bug 401. Bugfix
32205 - Directory caches now fetch certificates from all authorities
32206 listed in a networkstatus consensus, even when they do not
32207 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
32208 - When connecting to a bridge without specifying its key, insert
32209 the connection into the identity-to-connection map as soon as
32210 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
32211 - Detect versions of OS X where malloc_good_size() is present in the
32212 library but never actually declared. Resolves bug 587. Bugfix
32214 - Stop incorrectly truncating zlib responses to directory authority
32215 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
32216 - Stop recommending that every server operator send mail to tor-ops.
32217 Resolves bug 597. Bugfix on 0.1.2.x.
32218 - Don't trigger an assert if we start a directory authority with a
32219 private IP address (like 127.0.0.1).
32220 - Avoid possible failures when generating a directory with routers
32221 with over-long versions strings, or too many flags set. Bugfix
32223 - If an attempt to launch a DNS resolve request over the control
32224 port fails because we have overrun the limit on the number of
32225 connections, tell the controller that the request has failed.
32226 - Avoid using too little bandwidth when our clock skips a few
32227 seconds. Bugfix on 0.1.2.x.
32228 - Fix shell error when warning about missing packages in configure
32229 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
32230 - Do not become confused when receiving a spurious VERSIONS-like
32231 cell from a confused v1 client. Bugfix on 0.2.0.x.
32232 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
32233 introduction points for a hidden service have failed. Patch from
32234 Karsten Loesing. Bugfix on 0.2.0.x.
32236 o Code simplifications and refactoring:
32237 - Remove some needless generality from cpuworker code, for improved
32239 - Stop overloading the circuit_t.onionskin field for both "onionskin
32240 from a CREATE cell that we are waiting for a cpuworker to be
32241 assigned" and "onionskin from an EXTEND cell that we are going to
32242 send to an OR as soon as we are connected". Might help with bug 600.
32243 - Add an in-place version of aes_crypt() so that we can avoid doing a
32244 needless memcpy() call on each cell payload.
32247 Changes in version 0.2.0.18-alpha - 2008-01-25
32248 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
32249 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
32250 that can warn or reject connections to ports generally associated with
32251 vulnerable-plaintext protocols.
32253 o New directory authorities:
32254 - Set up dannenberg (run by CCC) as the sixth v3 directory
32258 - Fix a major memory leak when attempting to use the v2 TLS
32259 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
32260 - We accidentally enabled the under-development v2 TLS handshake
32261 code, which was causing log entries like "TLS error while
32262 renegotiating handshake". Disable it again. Resolves bug 590.
32263 - We were computing the wrong Content-Length: header for directory
32264 responses that need to be compressed on the fly, causing clients
32265 asking for those items to always fail. Bugfix on 0.2.0.x; partially
32269 - Avoid going directly to the directory authorities even if you're a
32270 relay, if you haven't found yourself reachable yet or if you've
32271 decided not to advertise your dirport yet. Addresses bug 556.
32272 - If we've gone 12 hours since our last bandwidth check, and we
32273 estimate we have less than 50KB bandwidth capacity but we could
32274 handle more, do another bandwidth test.
32275 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
32276 Tor can warn and/or refuse connections to ports commonly used with
32277 vulnerable-plaintext protocols. Currently we warn on ports 23,
32278 109, 110, and 143, but we don't reject any.
32281 - When we setconf ClientOnly to 1, close any current OR and Dir
32282 listeners. Reported by mwenge.
32283 - When we get a consensus that's been signed by more people than
32284 we expect, don't log about it; it's not a big deal. Reported
32288 - Don't answer "/tor/networkstatus-bridges" directory requests if
32289 the request isn't encrypted.
32290 - Make "ClientOnly 1" config option disable directory ports too.
32291 - Patches from Karsten Loesing to make v2 hidden services more
32292 robust: work even when there aren't enough HSDir relays available;
32293 retry when a v2 rend desc fetch fails; but don't retry if we
32294 already have a usable v0 rend desc.
32297 Changes in version 0.2.0.17-alpha - 2008-01-17
32298 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
32301 - Make the tor-gencert man page get included correctly in the tarball.
32304 Changes in version 0.2.0.16-alpha - 2008-01-17
32305 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
32306 Loesing, and generally cleans up a lot of features and minor bugs.
32308 o New directory authorities:
32309 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
32312 o Major performance improvements:
32313 - Switch our old ring buffer implementation for one more like that
32314 used by free Unix kernels. The wasted space in a buffer with 1mb
32315 of data will now be more like 8k than 1mb. The new implementation
32316 also avoids realloc();realloc(); patterns that can contribute to
32317 memory fragmentation.
32320 - Configuration files now accept C-style strings as values. This
32321 helps encode characters not allowed in the current configuration
32322 file format, such as newline or #. Addresses bug 557.
32323 - Although we fixed bug 539 (where servers would send HTTP status 503
32324 responses _and_ send a body too), there are still servers out
32325 there that haven't upgraded. Therefore, make clients parse such
32326 bodies when they receive them.
32327 - When we're not serving v2 directory information, there is no reason
32328 to actually keep any around. Remove the obsolete files and directory
32329 on startup if they are very old and we aren't going to serve them.
32331 o Minor performance improvements:
32332 - Reference-count and share copies of address policy entries; only 5%
32333 of them were actually distinct.
32334 - Never walk through the list of logs if we know that no log is
32335 interested in a given message.
32338 - When an authority has not signed a consensus, do not try to
32339 download a nonexistent "certificate with key 00000000". Bugfix
32340 on 0.2.0.x. Fixes bug 569.
32341 - Fix a rare assert error when we're closing one of our threads:
32342 use a mutex to protect the list of logs, so we never write to the
32343 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
32344 bug 575, which is kind of the revenge of bug 222.
32345 - Patch from Karsten Loesing to complain less at both the client
32346 and the relay when a relay used to have the HSDir flag but doesn't
32347 anymore, and we try to upload a hidden service descriptor.
32348 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
32350 - Do not try to download missing certificates until we have tried
32351 to check our fallback consensus. Fixes bug 583.
32352 - Make bridges round reported GeoIP stats info up to the nearest
32353 estimate, not down. Now we can distinguish between "0 people from
32354 this country" and "1 person from this country".
32355 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
32356 - Avoid possible segfault if key generation fails in
32357 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
32358 - Avoid segfault in the case where a badly behaved v2 versioning
32359 directory sends a signed networkstatus with missing client-versions.
32361 - Avoid segfaults on certain complex invocations of
32362 router_get_by_hexdigest(). Bugfix on 0.1.2.
32363 - Correct bad index on array access in parse_http_time(). Bugfix
32365 - Fix possible bug in vote generation when server versions are present
32366 but client versions are not.
32367 - Fix rare bug on REDIRECTSTREAM control command when called with no
32368 port set: it could erroneously report an error when none had
32370 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
32371 compressing large objects and find ourselves with more than 4k
32372 left over. Bugfix on 0.2.0.
32373 - Fix a small memory leak when setting up a hidden service.
32374 - Fix a few memory leaks that could in theory happen under bizarre
32376 - Fix an assert if we post a general-purpose descriptor via the
32377 control port but that descriptor isn't mentioned in our current
32378 network consensus. Bug reported by Jon McLachlan; bugfix on
32381 o Minor features (controller):
32382 - Get NS events working again. Patch from tup.
32383 - The GETCONF command now escapes and quotes configuration values
32384 that don't otherwise fit into the torrc file.
32385 - The SETCONF command now handles quoted values correctly.
32387 o Minor features (directory authorities):
32388 - New configuration options to override default maximum number of
32389 servers allowed on a single IP address. This is important for
32390 running a test network on a single host.
32391 - Actually implement the -s option to tor-gencert.
32392 - Add a manual page for tor-gencert.
32394 o Minor features (bridges):
32395 - Bridge authorities no longer serve bridge descriptors over
32396 unencrypted connections.
32398 o Minor features (other):
32399 - Add hidden services and DNSPorts to the list of things that make
32400 Tor accept that it has running ports. Change starting Tor with no
32401 ports from a fatal error to a warning; we might change it back if
32402 this turns out to confuse anybody. Fixes bug 579.
32405 Changes in version 0.1.2.19 - 2008-01-17
32406 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
32407 exit policy a little bit more conservative so it's safer to run an
32408 exit relay on a home system, and fixes a variety of smaller issues.
32411 - Exit policies now reject connections that are addressed to a
32412 relay's public (external) IP address too, unless
32413 ExitPolicyRejectPrivate is turned off. We do this because too
32414 many relays are running nearby to services that trust them based
32415 on network address.
32418 - When the clock jumps forward a lot, do not allow the bandwidth
32419 buckets to become negative. Fixes bug 544.
32420 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
32421 on every successful resolve. Reported by Mike Perry.
32422 - Purge old entries from the "rephist" database and the hidden
32423 service descriptor database even when DirPort is zero.
32424 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
32425 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
32426 crashing or mis-answering these requests.
32427 - When we decide to send a 503 response to a request for servers, do
32428 not then also send the server descriptors: this defeats the whole
32429 purpose. Fixes bug 539.
32432 - Changing the ExitPolicyRejectPrivate setting should cause us to
32433 rebuild our server descriptor.
32434 - Fix handling of hex nicknames when answering controller requests for
32435 networkstatus by name, or when deciding whether to warn about
32436 unknown routers in a config option. (Patch from mwenge.)
32437 - Fix a couple of hard-to-trigger autoconf problems that could result
32438 in really weird results on platforms whose sys/types.h files define
32439 nonstandard integer types.
32440 - Don't try to create the datadir when running --verify-config or
32441 --hash-password. Resolves bug 540.
32442 - If we were having problems getting a particular descriptor from the
32443 directory caches, and then we learned about a new descriptor for
32444 that router, we weren't resetting our failure count. Reported
32446 - Although we fixed bug 539 (where servers would send HTTP status 503
32447 responses _and_ send a body too), there are still servers out there
32448 that haven't upgraded. Therefore, make clients parse such bodies
32449 when they receive them.
32450 - Run correctly on systems where rlim_t is larger than unsigned long.
32451 This includes some 64-bit systems.
32452 - Run correctly on platforms (like some versions of OS X 10.5) where
32453 the real limit for number of open files is OPEN_FILES, not rlim_max
32454 from getrlimit(RLIMIT_NOFILES).
32455 - Avoid a spurious free on base64 failure.
32456 - Avoid segfaults on certain complex invocations of
32457 router_get_by_hexdigest().
32458 - Fix rare bug on REDIRECTSTREAM control command when called with no
32459 port set: it could erroneously report an error when none had
32463 Changes in version 0.2.0.15-alpha - 2007-12-25
32464 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
32465 features added in 0.2.0.13-alpha.
32468 - Fix several remotely triggerable asserts based on DirPort requests
32469 for a v2 or v3 networkstatus object before we were prepared. This
32470 was particularly bad for 0.2.0.13 and later bridge relays, who
32471 would never have a v2 networkstatus and would thus always crash
32472 when used. Bugfixes on 0.2.0.x.
32473 - Estimate the v3 networkstatus size more accurately, rather than
32474 estimating it at zero bytes and giving it artificially high priority
32475 compared to other directory requests. Bugfix on 0.2.0.x.
32478 - Fix configure.in logic for cross-compilation.
32479 - When we load a bridge descriptor from the cache, and it was
32480 previously unreachable, mark it as retriable so we won't just
32481 ignore it. Also, try fetching a new copy immediately. Bugfixes
32483 - The bridge GeoIP stats were counting other relays, for example
32484 self-reachability and authority-reachability tests.
32487 - Support compilation to target iPhone; patch from cjacker huang.
32488 To build for iPhone, pass the --enable-iphone option to configure.
32491 Changes in version 0.2.0.14-alpha - 2007-12-23
32493 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
32494 without a datadirectory from a previous Tor install. Reported
32496 - Fix a crash when we fetch a descriptor that turns out to be
32497 unexpected (it used to be in our networkstatus when we started
32498 fetching it, but it isn't in our current networkstatus), and we
32499 aren't using bridges. Bugfix on 0.2.0.x.
32500 - Fix a crash when accessing hidden services: it would work the first
32501 time you use a given introduction point for your service, but
32502 on subsequent requests we'd be using garbage memory. Fixed by
32503 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
32504 - Fix a crash when we load a bridge descriptor from disk but we don't
32505 currently have a Bridge line for it in our torrc. Bugfix on
32509 - If bridge authorities set BridgePassword, they will serve a
32510 snapshot of known bridge routerstatuses from their DirPort to
32511 anybody who knows that password. Unset by default.
32514 - Make the unit tests build again.
32515 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
32516 - Make PublishServerDescriptor default to 1, so the default doesn't
32517 have to change as we invent new directory protocol versions.
32518 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
32519 be included unless sys/time.h is already included. Fixes
32520 bug 553. Bugfix on 0.2.0.x.
32521 - If we receive a general-purpose descriptor and then receive an
32522 identical bridge-purpose descriptor soon after, don't discard
32523 the next one as a duplicate.
32526 - If BridgeRelay is set to 1, then the default for
32527 PublishServerDescriptor is now "bridge" rather than "v2,v3".
32528 - If the user sets RelayBandwidthRate but doesn't set
32529 RelayBandwidthBurst, then make them equal rather than erroring out.
32532 Changes in version 0.2.0.13-alpha - 2007-12-21
32533 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
32534 Goodell, fixes many more bugs, and adds a lot of infrastructure for
32537 o New directory authorities:
32538 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
32542 - Only update guard status (usable / not usable) once we have
32543 enough directory information. This was causing us to always pick
32544 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
32545 causing us to discard all our guards on startup if we hadn't been
32546 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
32547 - Purge old entries from the "rephist" database and the hidden
32548 service descriptor databases even when DirPort is zero. Bugfix
32550 - We were ignoring our RelayBandwidthRate for the first 30 seconds
32551 after opening a circuit -- even a relayed circuit. Bugfix on
32553 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
32554 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
32555 crashing or mis-answering these types of requests.
32556 - Relays were publishing their server descriptor to v1 and v2
32557 directory authorities, but they didn't try publishing to v3-only
32558 authorities. Fix this; and also stop publishing to v1 authorities.
32560 - When we were reading router descriptors from cache, we were ignoring
32561 the annotations -- so for example we were reading in bridge-purpose
32562 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
32563 - When we decided to send a 503 response to a request for servers, we
32564 were then also sending the server descriptors: this defeats the
32565 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
32568 - Bridge relays now behave like clients with respect to time
32569 intervals for downloading new consensus documents -- otherwise they
32570 stand out. Bridge users now wait until the end of the interval,
32571 so their bridge relay will be sure to have a new consensus document.
32572 - Three new config options (AlternateDirAuthority,
32573 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
32574 user selectively replace the default directory authorities by type,
32575 rather than the all-or-nothing replacement that DirServer offers.
32576 - Tor can now be configured to read a GeoIP file from disk in one
32577 of two formats. This can be used by controllers to map IP addresses
32578 to countries. Eventually, it may support exit-by-country.
32579 - When possible, bridge relays remember which countries users
32580 are coming from, and report aggregate information in their
32581 extra-info documents, so that the bridge authorities can learn
32582 where Tor is blocked.
32583 - Bridge directory authorities now do reachability testing on the
32584 bridges they know. They provide router status summaries to the
32585 controller via "getinfo ns/purpose/bridge", and also dump summaries
32586 to a file periodically.
32587 - Stop fetching directory info so aggressively if your DirPort is
32588 on but your ORPort is off; stop fetching v2 dir info entirely.
32589 You can override these choices with the new FetchDirInfoEarly
32593 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
32594 consensus documents when there are too many relays at a single
32595 IP address. Now clear it in v2 network status documents too, and
32596 also clear it in routerinfo_t when the relay is no longer listed
32597 in the relevant networkstatus document.
32598 - Don't crash if we get an unexpected value for the
32599 PublishServerDescriptor config option. Reported by Matt Edman;
32600 bugfix on 0.2.0.9-alpha.
32601 - Our new v2 hidden service descriptor format allows descriptors
32602 that have no introduction points. But Tor crashed when we tried
32603 to build a descriptor with no intro points (and it would have
32604 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
32605 by Karsten Loesing.
32606 - Fix building with dmalloc 5.5.2 with glibc.
32607 - Reject uploaded descriptors and extrainfo documents if they're
32608 huge. Otherwise we'll cache them all over the network and it'll
32609 clog everything up. Reported by Aljosha Judmayer.
32610 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
32611 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
32612 - When the DANGEROUS_VERSION controller status event told us we're
32613 running an obsolete version, it used the string "OLD" to describe
32614 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
32615 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
32616 - If we can't expand our list of entry guards (e.g. because we're
32617 using bridges or we have StrictEntryNodes set), don't mark relays
32618 down when they fail a directory request. Otherwise we're too quick
32619 to mark all our entry points down. Bugfix on 0.1.2.x.
32620 - Fix handling of hex nicknames when answering controller requests for
32621 networkstatus by name, or when deciding whether to warn about unknown
32622 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
32623 - Fix a couple of hard-to-trigger autoconf problems that could result
32624 in really weird results on platforms whose sys/types.h files define
32625 nonstandard integer types. Bugfix on 0.1.2.x.
32626 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
32627 - Don't crash on name lookup when we have no current consensus. Fixes
32628 bug 538; bugfix on 0.2.0.x.
32629 - Only Tors that want to mirror the v2 directory info should
32630 create the "cached-status" directory in their datadir. (All Tors
32631 used to create it.) Bugfix on 0.2.0.9-alpha.
32632 - Directory authorities should only automatically download Extra Info
32633 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
32636 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
32637 consumers. (We already do this on HUP.)
32638 - Authorities and caches fetch the v2 networkstatus documents
32639 less often, now that v3 is encouraged.
32640 - Add a new config option BridgeRelay that specifies you want to
32641 be a bridge relay. Right now the only difference is that it makes
32642 you answer begin_dir requests, and it makes you cache dir info,
32643 even if your DirPort isn't on.
32644 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
32645 ask about source, timestamp of arrival, purpose, etc. We need
32646 something like this to help Vidalia not do GeoIP lookups on bridge
32648 - Allow multiple HashedControlPassword config lines, to support
32649 multiple controller passwords.
32650 - Authorities now decide whether they're authoritative for a given
32651 router based on the router's purpose.
32652 - New config options AuthDirBadDir and AuthDirListBadDirs for
32653 authorities to mark certain relays as "bad directories" in the
32654 networkstatus documents. Also supports the "!baddir" directive in
32655 the approved-routers file.
32658 Changes in version 0.2.0.12-alpha - 2007-11-16
32659 This twelfth development snapshot fixes some more build problems as
32660 well as a few minor bugs.
32663 - Make it build on OpenBSD again. Patch from tup.
32664 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
32665 package-building for Red Hat, OS X, etc.
32667 o Minor bugfixes (on 0.1.2.x):
32668 - Changing the ExitPolicyRejectPrivate setting should cause us to
32669 rebuild our server descriptor.
32671 o Minor bugfixes (on 0.2.0.x):
32672 - When we're lacking a consensus, don't try to perform rendezvous
32673 operations. Reported by Karsten Loesing.
32674 - Fix a small memory leak whenever we decide against using a
32675 newly picked entry guard. Reported by Mike Perry.
32676 - When authorities detected more than two relays running on the same
32677 IP address, they were clearing all the status flags but forgetting
32678 to clear the "hsdir" flag. So clients were being told that a
32679 given relay was the right choice for a v2 hsdir lookup, yet they
32680 never had its descriptor because it was marked as 'not running'
32682 - If we're trying to fetch a bridge descriptor and there's no way
32683 the bridge authority could help us (for example, we don't know
32684 a digest, or there is no bridge authority), don't be so eager to
32685 fall back to asking the bridge authority.
32686 - If we're using bridges or have strictentrynodes set, and our
32687 chosen exit is in the same family as all our bridges/entry guards,
32688 then be flexible about families.
32691 - When we negotiate a v2 link-layer connection (not yet implemented),
32692 accept RELAY_EARLY cells and turn them into RELAY cells if we've
32693 negotiated a v1 connection for their next step. Initial code for
32697 Changes in version 0.2.0.11-alpha - 2007-11-12
32698 This eleventh development snapshot fixes some build problems with
32699 the previous snapshot. It also includes a more secure-by-default exit
32700 policy for relays, fixes an enormous memory leak for exit relays, and
32701 fixes another bug where servers were falling out of the directory list.
32704 - Exit policies now reject connections that are addressed to a
32705 relay's public (external) IP address too, unless
32706 ExitPolicyRejectPrivate is turned off. We do this because too
32707 many relays are running nearby to services that trust them based
32708 on network address. Bugfix on 0.1.2.x.
32711 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
32712 on every successful resolve. Reported by Mike Perry; bugfix
32714 - On authorities, never downgrade to old router descriptors simply
32715 because they're listed in the consensus. This created a catch-22
32716 where we wouldn't list a new descriptor because there was an
32717 old one in the consensus, and we couldn't get the new one in the
32718 consensus because we wouldn't list it. Possible fix for bug 548.
32719 Also, this might cause bug 543 to appear on authorities; if so,
32720 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
32722 o Packaging fixes on 0.2.0.10-alpha:
32723 - We were including instructions about what to do with the
32724 src/config/fallback-consensus file, but we weren't actually
32725 including it in the tarball. Disable all of that for now.
32728 - Allow people to say PreferTunnelledDirConns rather than
32729 PreferTunneledDirConns, for those alternate-spellers out there.
32732 - Don't reevaluate all the information from our consensus document
32733 just because we've downloaded a v2 networkstatus that we intend
32734 to cache. Fixes bug 545; bugfix on 0.2.0.x.
32737 Changes in version 0.2.0.10-alpha - 2007-11-10
32738 This tenth development snapshot adds a third v3 directory authority
32739 run by Mike Perry, adds most of Karsten Loesing's new hidden service
32740 descriptor format, fixes a bad crash bug and new bridge bugs introduced
32741 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
32742 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
32743 addresses many more minor issues.
32745 o New directory authorities:
32746 - Set up ides (run by Mike Perry) as the third v3 directory authority.
32749 - Allow tunnelled directory connections to ask for an encrypted
32750 "begin_dir" connection or an anonymized "uses a full Tor circuit"
32751 connection independently. Now we can make anonymized begin_dir
32752 connections for (e.g.) more secure hidden service posting and
32754 - More progress on proposal 114: code from Karsten Loesing to
32755 implement new hidden service descriptor format.
32756 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
32757 accommodate the growing number of servers that use the default
32758 and are reaching it.
32759 - Directory authorities use a new formula for selecting which nodes
32760 to advertise as Guards: they must be in the top 7/8 in terms of
32761 how long we have known about them, and above the median of those
32762 nodes in terms of weighted fractional uptime.
32763 - Make "not enough dir info yet" warnings describe *why* Tor feels
32764 it doesn't have enough directory info yet.
32767 - Stop servers from crashing if they set a Family option (or
32768 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
32770 - Make bridge users work again -- the move to v3 directories in
32771 0.2.0.9-alpha had introduced a number of bugs that made bridges
32772 no longer work for clients.
32773 - When the clock jumps forward a lot, do not allow the bandwidth
32774 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
32776 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
32777 - When the consensus lists a router descriptor that we previously were
32778 mirroring, but that we considered non-canonical, reload the
32779 descriptor as canonical. This fixes bug 543 where Tor servers
32780 would start complaining after a few days that they don't have
32781 enough directory information to build a circuit.
32782 - Consider replacing the current consensus when certificates arrive
32783 that make the pending consensus valid. Previously, we were only
32784 considering replacement when the new certs _didn't_ help.
32785 - Fix an assert error on startup if we didn't already have the
32786 consensus and certs cached in our datadirectory: we were caching
32787 the consensus in consensus_waiting_for_certs but then free'ing it
32789 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
32790 Request) if we need more v3 certs but we've already got pending
32791 requests for all of them.
32792 - Correctly back off from failing certificate downloads. Fixes
32794 - Authorities don't vote on the Running flag if they have been running
32795 for less than 30 minutes themselves. Fixes bug 547, where a newly
32796 started authority would vote that everyone was down.
32798 o New requirements:
32799 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
32800 it, it had no AES, and it hasn't seen any security patches since
32804 - Clients now hold circuitless TLS connections open for 1.5 times
32805 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
32806 rebuild a new circuit over them within that timeframe. Previously,
32807 they held them open only for KeepalivePeriod (5 minutes).
32808 - Use "If-Modified-Since" to avoid retrieving consensus
32809 networkstatuses that we already have.
32810 - When we have no consensus, check FallbackNetworkstatusFile (defaults
32811 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
32812 we start knowing some directory caches.
32813 - When we receive a consensus from the future, warn about skew.
32814 - Improve skew reporting: try to give the user a better log message
32815 about how skewed they are, and how much this matters.
32816 - When we have a certificate for an authority, believe that
32817 certificate's claims about the authority's IP address.
32818 - New --quiet command-line option to suppress the default console log.
32819 Good in combination with --hash-password.
32820 - Authorities send back an X-Descriptor-Not-New header in response to
32821 an accepted-but-discarded descriptor upload. Partially implements
32823 - Make the log message for "tls error. breaking." more useful.
32824 - Better log messages about certificate downloads, to attempt to
32825 track down the second incarnation of bug 546.
32827 o Minor features (bridges):
32828 - If bridge users set UpdateBridgesFromAuthority, but the digest
32829 they ask for is a 404 from the bridge authority, they now fall
32830 back to trying the bridge directly.
32831 - Bridges now use begin_dir to publish their server descriptor to
32832 the bridge authority, even when they haven't set TunnelDirConns.
32834 o Minor features (controller):
32835 - When reporting clock skew, and we know that the clock is _at least
32836 as skewed_ as some value, but we don't know the actual value,
32837 report the value as a "minimum skew."
32840 - Update linux-tor-prio.sh script to allow QoS based on the uid of
32841 the Tor process. Patch from Marco Bonetti with tweaks from Mike
32845 - Refuse to start if both ORPort and UseBridges are set. Bugfix
32846 on 0.2.0.x, suggested by Matt Edman.
32847 - Don't stop fetching descriptors when FetchUselessDescriptors is
32848 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
32849 reported by tup and ioerror.
32850 - Better log message on vote from unknown authority.
32851 - Don't log "Launching 0 request for 0 router" message.
32853 o Minor bugfixes (memory leaks):
32854 - Stop leaking memory every time we parse a v3 certificate. Bugfix
32856 - Stop leaking memory every time we load a v3 certificate. Bugfix
32857 on 0.2.0.1-alpha. Fixes bug 536.
32858 - Stop leaking a cached networkstatus on exit. Bugfix on
32860 - Stop leaking voter information every time we free a consensus.
32861 Bugfix on 0.2.0.3-alpha.
32862 - Stop leaking signed data every time we check a voter signature.
32863 Bugfix on 0.2.0.3-alpha.
32864 - Stop leaking a signature every time we fail to parse a consensus or
32865 a vote. Bugfix on 0.2.0.3-alpha.
32866 - Stop leaking v2_download_status_map on shutdown. Bugfix on
32868 - Stop leaking conn->nickname every time we make a connection to a
32869 Tor relay without knowing its expected identity digest (e.g. when
32870 using bridges). Bugfix on 0.2.0.3-alpha.
32872 - Minor bugfixes (portability):
32873 - Run correctly on platforms where rlim_t is larger than unsigned
32874 long, and/or where the real limit for number of open files is
32875 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
32876 particular, these may be needed for OS X 10.5.
32879 Changes in version 0.1.2.18 - 2007-10-28
32880 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
32881 hidden service introduction that were causing huge delays, and a big
32882 bug that was causing some servers to disappear from the network status
32883 lists for a few hours each day.
32885 o Major bugfixes (crashes):
32886 - If a connection is shut down abruptly because of something that
32887 happened inside connection_flushed_some(), do not call
32888 connection_finished_flushing(). Should fix bug 451:
32889 "connection_stop_writing: Assertion conn->write_event failed"
32890 Bugfix on 0.1.2.7-alpha.
32891 - Fix possible segfaults in functions called from
32892 rend_process_relay_cell().
32894 o Major bugfixes (hidden services):
32895 - Hidden services were choosing introduction points uniquely by
32896 hexdigest, but when constructing the hidden service descriptor
32897 they merely wrote the (potentially ambiguous) nickname.
32898 - Clients now use the v2 intro format for hidden service
32899 connections: they specify their chosen rendezvous point by identity
32900 digest rather than by (potentially ambiguous) nickname. These
32901 changes could speed up hidden service connections dramatically.
32903 o Major bugfixes (other):
32904 - Stop publishing a new server descriptor just because we get a
32905 HUP signal. This led (in a roundabout way) to some servers getting
32906 dropped from the networkstatus lists for a few hours each day.
32907 - When looking for a circuit to cannibalize, consider family as well
32908 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
32909 circuit cannibalization).
32910 - When a router wasn't listed in a new networkstatus, we were leaving
32911 the flags for that router alone -- meaning it remained Named,
32912 Running, etc -- even though absence from the networkstatus means
32913 that it shouldn't be considered to exist at all anymore. Now we
32914 clear all the flags for routers that fall out of the networkstatus
32915 consensus. Fixes bug 529.
32918 - Don't try to access (or alter) the state file when running
32919 --list-fingerprint or --verify-config or --hash-password. Resolves
32921 - When generating information telling us how to extend to a given
32922 router, do not try to include the nickname if it is
32923 absent. Resolves bug 467.
32924 - Fix a user-triggerable segfault in expand_filename(). (There isn't
32925 a way to trigger this remotely.)
32926 - When sending a status event to the controller telling it that an
32927 OR address is reachable, set the port correctly. (Previously we
32928 were reporting the dir port.)
32929 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
32930 command. Bugfix on 0.1.2.17.
32931 - When loading bandwidth history, do not believe any information in
32932 the future. Fixes bug 434.
32933 - When loading entry guard information, do not believe any information
32935 - When we have our clock set far in the future and generate an
32936 onion key, then re-set our clock to be correct, we should not stop
32937 the onion key from getting rotated.
32938 - On some platforms, accept() can return a broken address. Detect
32939 this more quietly, and deal accordingly. Fixes bug 483.
32940 - It's not actually an error to find a non-pending entry in the DNS
32941 cache when canceling a pending resolve. Don't log unless stuff
32942 is fishy. Resolves bug 463.
32943 - Don't reset trusted dir server list when we set a configuration
32944 option. Patch from Robert Hogan.
32945 - Don't try to create the datadir when running --verify-config or
32946 --hash-password. Resolves bug 540.
32949 Changes in version 0.2.0.9-alpha - 2007-10-24
32950 This ninth development snapshot switches clients to the new v3 directory
32951 system; allows servers to be listed in the network status even when they
32952 have the same nickname as a registered server; and fixes many other
32953 bugs including a big one that was causing some servers to disappear
32954 from the network status lists for a few hours each day.
32956 o Major features (directory system):
32957 - Clients now download v3 consensus networkstatus documents instead
32958 of v2 networkstatus documents. Clients and caches now base their
32959 opinions about routers on these consensus documents. Clients only
32960 download router descriptors listed in the consensus.
32961 - Authorities now list servers who have the same nickname as
32962 a different named server, but list them with a new flag,
32963 "Unnamed". Now we can list servers that happen to pick the same
32964 nickname as a server that registered two years ago and then
32965 disappeared. Partially implements proposal 122.
32966 - If the consensus lists a router as "Unnamed", the name is assigned
32967 to a different router: do not identify the router by that name.
32968 Partially implements proposal 122.
32969 - Authorities can now come to a consensus on which method to use to
32970 compute the consensus. This gives us forward compatibility.
32973 - Stop publishing a new server descriptor just because we HUP or
32974 when we find our DirPort to be reachable but won't actually publish
32975 it. New descriptors without any real changes are dropped by the
32976 authorities, and can screw up our "publish every 18 hours" schedule.
32978 - When a router wasn't listed in a new networkstatus, we were leaving
32979 the flags for that router alone -- meaning it remained Named,
32980 Running, etc -- even though absence from the networkstatus means
32981 that it shouldn't be considered to exist at all anymore. Now we
32982 clear all the flags for routers that fall out of the networkstatus
32983 consensus. Fixes bug 529; bugfix on 0.1.2.x.
32984 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
32985 extrainfo documents and then discard them immediately for not
32986 matching the latest router. Bugfix on 0.2.0.1-alpha.
32988 o Minor features (v3 directory protocol):
32989 - Allow tor-gencert to generate a new certificate without replacing
32991 - Allow certificates to include an address.
32992 - When we change our directory-cache settings, reschedule all voting
32993 and download operations.
32994 - Reattempt certificate downloads immediately on failure, as long as
32995 we haven't failed a threshold number of times yet.
32996 - Delay retrying consensus downloads while we're downloading
32997 certificates to verify the one we just got. Also, count getting a
32998 consensus that we already have (or one that isn't valid) as a failure,
32999 and count failing to get the certificates after 20 minutes as a
33001 - Build circuits and download descriptors even if our consensus is a
33002 little expired. (This feature will go away once authorities are
33005 o Minor features (router descriptor cache):
33006 - If we find a cached-routers file that's been sitting around for more
33007 than 28 days unmodified, then most likely it's a leftover from
33008 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
33010 - When we (as a cache) download a descriptor because it was listed
33011 in a consensus, remember when the consensus was supposed to expire,
33012 and don't expire the descriptor until then.
33014 o Minor features (performance):
33015 - Call routerlist_remove_old_routers() much less often. This should
33016 speed startup, especially on directory caches.
33017 - Don't try to launch new descriptor downloads quite so often when we
33018 already have enough directory information to build circuits.
33019 - Base64 decoding was actually showing up on our profile when parsing
33020 the initial descriptor file; switch to an in-process all-at-once
33021 implementation that's about 3.5x times faster than calling out to
33024 o Minor features (compilation):
33025 - Detect non-ASCII platforms (if any still exist) and refuse to
33026 build there: some of our code assumes that 'A' is 65 and so on.
33028 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
33029 - Make the "next period" votes into "current period" votes immediately
33030 after publishing the consensus; avoid a heisenbug that made them
33031 stick around indefinitely.
33032 - When we discard a vote as a duplicate, do not report this as
33034 - Treat missing v3 keys or certificates as an error when running as a
33035 v3 directory authority.
33036 - When we're configured to be a v3 authority, but we're only listed
33037 as a non-v3 authority in our DirServer line for ourself, correct
33039 - If an authority doesn't have a qualified hostname, just put
33040 its address in the vote. This fixes the problem where we referred to
33041 "moria on moria:9031."
33042 - Distinguish between detached signatures for the wrong period, and
33043 detached signatures for a divergent vote.
33044 - Fix a small memory leak when computing a consensus.
33045 - When there's no consensus, we were forming a vote every 30
33046 minutes, but writing the "valid-after" line in our vote based
33047 on our configured V3AuthVotingInterval: so unless the intervals
33048 matched up, we immediately rejected our own vote because it didn't
33049 start at the voting interval that caused us to construct a vote.
33051 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
33052 - Delete unverified-consensus when the real consensus is set.
33053 - Consider retrying a consensus networkstatus fetch immediately
33054 after one fails: don't wait 60 seconds to notice.
33055 - When fetching a consensus as a cache, wait until a newer consensus
33056 should exist before trying to replace the current one.
33057 - Use a more forgiving schedule for retrying failed consensus
33058 downloads than for other types.
33060 o Minor bugfixes (other directory issues):
33061 - Correct the implementation of "download votes by digest." Bugfix on
33063 - Authorities no longer send back "400 you're unreachable please fix
33064 it" errors to Tor servers that aren't online all the time. We're
33065 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
33067 o Minor bugfixes (controller):
33068 - Don't reset trusted dir server list when we set a configuration
33069 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
33070 - Respond to INT and TERM SIGNAL commands before we execute the
33071 signal, in case the signal shuts us down. We had a patch in
33072 0.1.2.1-alpha that tried to do this by queueing the response on
33073 the connection's buffer before shutting down, but that really
33074 isn't the same thing at all. Bug located by Matt Edman.
33076 o Minor bugfixes (misc):
33077 - Correctly check for bad options to the "PublishServerDescriptor"
33078 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
33079 - Stop leaking memory on failing case of base32_decode, and make
33080 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
33081 - Don't try to download extrainfo documents when we're trying to
33082 fetch enough directory info to build a circuit: having enough
33083 info should get priority. Bugfix on 0.2.0.x.
33084 - Don't complain that "your server has not managed to confirm that its
33085 ports are reachable" if we haven't been able to build any circuits
33086 yet. Bug found by spending four hours without a v3 consensus. Bugfix
33088 - Detect the reason for failing to mmap a descriptor file we just
33089 wrote, and give a more useful log message. Fixes bug 533. Bugfix
33092 o Code simplifications and refactoring:
33093 - Remove support for the old bw_accounting file: we've been storing
33094 bandwidth accounting information in the state file since
33095 0.1.2.5-alpha. This may result in bandwidth accounting errors
33096 if you try to upgrade from 0.1.1.x or earlier, or if you try to
33097 downgrade to 0.1.1.x or earlier.
33098 - New convenience code to locate a file within the DataDirectory.
33099 - Move non-authority functionality out of dirvote.c.
33100 - Refactor the arguments for router_pick_{directory_|trusteddir}server
33101 so that they all take the same named flags.
33104 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
33105 Unix users an easy way to script their Tor process (e.g. by
33106 adjusting bandwidth based on the time of the day).
33109 Changes in version 0.2.0.8-alpha - 2007-10-12
33110 This eighth development snapshot fixes a crash bug that's been bothering
33111 us since February 2007, lets bridge authorities store a list of bridge
33112 descriptors they've seen, gets v3 directory voting closer to working,
33113 starts caching v3 directory consensus documents on directory mirrors,
33114 and fixes a variety of smaller issues including some minor memory leaks.
33116 o Major features (router descriptor cache):
33117 - Store routers in a file called cached-descriptors instead of in
33118 cached-routers. Initialize cached-descriptors from cached-routers
33119 if the old format is around. The new format allows us to store
33120 annotations along with descriptors.
33121 - Use annotations to record the time we received each descriptor, its
33122 source, and its purpose.
33123 - Disable the SETROUTERPURPOSE controller command: it is now
33125 - Controllers should now specify cache=no or cache=yes when using
33126 the +POSTDESCRIPTOR command.
33127 - Bridge authorities now write bridge descriptors to disk, meaning
33128 we can export them to other programs and begin distributing them
33131 o Major features (directory authorities):
33132 - When a v3 authority is missing votes or signatures, it now tries
33134 - Directory authorities track weighted fractional uptime as well as
33135 weighted mean-time-between failures. WFU is suitable for deciding
33136 whether a node is "usually up", while MTBF is suitable for deciding
33137 whether a node is "likely to stay up." We need both, because
33138 "usually up" is a good requirement for guards, while "likely to
33139 stay up" is a good requirement for long-lived connections.
33141 o Major features (v3 directory system):
33142 - Caches now download v3 network status documents as needed,
33143 and download the descriptors listed in them.
33144 - All hosts now attempt to download and keep fresh v3 authority
33145 certificates, and re-attempt after failures.
33146 - More internal-consistency checks for vote parsing.
33148 o Major bugfixes (crashes):
33149 - If a connection is shut down abruptly because of something that
33150 happened inside connection_flushed_some(), do not call
33151 connection_finished_flushing(). Should fix bug 451. Bugfix on
33154 o Major bugfixes (performance):
33155 - Fix really bad O(n^2) performance when parsing a long list of
33156 routers: Instead of searching the entire list for an "extra-info "
33157 string which usually wasn't there, once for every routerinfo
33158 we read, just scan lines forward until we find one we like.
33160 - When we add data to a write buffer in response to the data on that
33161 write buffer getting low because of a flush, do not consider the
33162 newly added data as a candidate for immediate flushing, but rather
33163 make it wait until the next round of writing. Otherwise, we flush
33164 and refill recursively, and a single greedy TLS connection can
33165 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
33167 o Minor features (v3 authority system):
33168 - Add more ways for tools to download the votes that lead to the
33170 - Send a 503 when low on bandwidth and a vote, consensus, or
33171 certificate is requested.
33172 - If-modified-since is now implemented properly for all kinds of
33173 certificate requests.
33175 o Minor bugfixes (network statuses):
33176 - Tweak the implementation of proposal 109 slightly: allow at most
33177 two Tor servers on the same IP address, except if it's the location
33178 of a directory authority, in which case allow five. Bugfix on
33181 o Minor bugfixes (controller):
33182 - When sending a status event to the controller telling it that an
33183 OR address is reachable, set the port correctly. (Previously we
33184 were reporting the dir port.) Bugfix on 0.1.2.x.
33186 o Minor bugfixes (v3 directory system):
33187 - Fix logic to look up a cert by its signing key digest. Bugfix on
33189 - Only change the reply to a vote to "OK" if it's not already
33190 set. This gets rid of annoying "400 OK" log messages, which may
33191 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
33192 - When we get a valid consensus, recompute the voting schedule.
33193 - Base the valid-after time of a vote on the consensus voting
33194 schedule, not on our preferred schedule.
33195 - Make the return values and messages from signature uploads and
33196 downloads more sensible.
33197 - Fix a memory leak when serving votes and consensus documents, and
33198 another when serving certificates.
33200 o Minor bugfixes (performance):
33201 - Use a slightly simpler string hashing algorithm (copying Python's
33202 instead of Java's) and optimize our digest hashing algorithm to take
33203 advantage of 64-bit platforms and to remove some possibly-costly
33205 - Fix a minor memory leak whenever we parse guards from our state
33206 file. Bugfix on 0.2.0.7-alpha.
33207 - Fix a minor memory leak whenever we write out a file. Bugfix on
33209 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
33210 command. Bugfix on 0.2.0.5-alpha.
33212 o Minor bugfixes (portability):
33213 - On some platforms, accept() can return a broken address. Detect
33214 this more quietly, and deal accordingly. Fixes bug 483.
33215 - Stop calling tor_strlower() on uninitialized memory in some cases.
33216 Bugfix in 0.2.0.7-alpha.
33218 o Minor bugfixes (usability):
33219 - Treat some 403 responses from directory servers as INFO rather than
33220 WARN-severity events.
33221 - It's not actually an error to find a non-pending entry in the DNS
33222 cache when canceling a pending resolve. Don't log unless stuff is
33223 fishy. Resolves bug 463.
33225 o Minor bugfixes (anonymity):
33226 - Never report that we've used more bandwidth than we're willing to
33227 relay: it leaks how much non-relay traffic we're using. Resolves
33229 - When looking for a circuit to cannibalize, consider family as well
33230 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
33231 circuit cannibalization).
33233 o Code simplifications and refactoring:
33234 - Make a bunch of functions static. Remove some dead code.
33235 - Pull out about a third of the really big routerlist.c; put it in a
33236 new module, networkstatus.c.
33237 - Merge the extra fields in local_routerstatus_t back into
33238 routerstatus_t: we used to need one routerstatus_t for each
33239 authority's opinion, plus a local_routerstatus_t for the locally
33240 computed consensus opinion. To save space, we put the locally
33241 modified fields into local_routerstatus_t, and only the common
33242 stuff into routerstatus_t. But once v3 directories are in use,
33243 clients and caches will no longer need to hold authority opinions;
33244 thus, the rationale for keeping the types separate is now gone.
33245 - Make the code used to reschedule and reattempt downloads more
33247 - Turn all 'Are we a directory server/mirror?' logic into a call to
33249 - Remove the code to generate the oldest (v1) directory format.
33250 The code has been disabled since 0.2.0.5-alpha.
33253 Changes in version 0.2.0.7-alpha - 2007-09-21
33254 This seventh development snapshot makes bridges work again, makes bridge
33255 authorities work for the first time, fixes two huge performance flaws
33256 in hidden services, and fixes a variety of minor issues.
33258 o New directory authorities:
33259 - Set up moria1 and tor26 as the first v3 directory authorities. See
33260 doc/spec/dir-spec.txt for details on the new directory design.
33262 o Major bugfixes (crashes):
33263 - Fix possible segfaults in functions called from
33264 rend_process_relay_cell(). Bugfix on 0.1.2.x.
33266 o Major bugfixes (bridges):
33267 - Fix a bug that made servers send a "404 Not found" in response to
33268 attempts to fetch their server descriptor. This caused Tor servers
33269 to take many minutes to establish reachability for their DirPort,
33270 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
33271 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
33272 users configure that and specify a bridge with an identity
33273 fingerprint, now they will lookup the bridge descriptor at the
33274 default bridge authority via a one-hop tunnel, but once circuits
33275 are established they will switch to a three-hop tunnel for later
33276 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
33278 o Major bugfixes (hidden services):
33279 - Hidden services were choosing introduction points uniquely by
33280 hexdigest, but when constructing the hidden service descriptor
33281 they merely wrote the (potentially ambiguous) nickname.
33282 - Clients now use the v2 intro format for hidden service
33283 connections: they specify their chosen rendezvous point by identity
33284 digest rather than by (potentially ambiguous) nickname. Both
33285 are bugfixes on 0.1.2.x, and they could speed up hidden service
33286 connections dramatically. Thanks to Karsten Loesing.
33288 o Minor features (security):
33289 - As a client, do not believe any server that tells us that an
33290 address maps to an internal address space.
33291 - Make it possible to enable HashedControlPassword and
33292 CookieAuthentication at the same time.
33294 o Minor features (guard nodes):
33295 - Tag every guard node in our state file with the version that
33296 we believe added it, or with our own version if we add it. This way,
33297 if a user temporarily runs an old version of Tor and then switches
33298 back to a new one, she doesn't automatically lose her guards.
33300 o Minor features (speed):
33301 - When implementing AES counter mode, update only the portions of the
33302 counter buffer that need to change, and don't keep separate
33303 network-order and host-order counters when they are the same (i.e.,
33304 on big-endian hosts.)
33306 o Minor features (controller):
33307 - Accept LF instead of CRLF on controller, since some software has a
33308 hard time generating real Internet newlines.
33309 - Add GETINFO values for the server status events
33310 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
33313 o Removed features:
33314 - Routers no longer include bandwidth-history lines in their
33315 descriptors; this information is already available in extra-info
33316 documents, and including it in router descriptors took up 60%
33317 (!) of compressed router descriptor downloads. Completes
33318 implementation of proposal 104.
33319 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
33320 and TorControl.py, as they use the old v0 controller protocol,
33321 and are obsoleted by TorFlow anyway.
33322 - Drop support for v1 rendezvous descriptors, since we never used
33323 them anyway, and the code has probably rotted by now. Based on
33324 patch from Karsten Loesing.
33325 - On OSX, stop warning the user that kqueue support in libevent is
33326 "experimental", since it seems to have worked fine for ages.
33329 - When generating information telling us how to extend to a given
33330 router, do not try to include the nickname if it is absent. Fixes
33331 bug 467. Bugfix on 0.2.0.3-alpha.
33332 - Fix a user-triggerable (but not remotely-triggerable) segfault
33333 in expand_filename(). Bugfix on 0.1.2.x.
33334 - Fix a memory leak when freeing incomplete requests from DNSPort.
33335 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
33336 - Don't try to access (or alter) the state file when running
33337 --list-fingerprint or --verify-config or --hash-password. (Resolves
33338 bug 499.) Bugfix on 0.1.2.x.
33339 - Servers used to decline to publish their DirPort if their
33340 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
33341 were below a threshold. Now they only look at BandwidthRate and
33342 RelayBandwidthRate. Bugfix on 0.1.2.x.
33343 - Remove an optimization in the AES counter-mode code that assumed
33344 that the counter never exceeded 2^68. When the counter can be set
33345 arbitrarily as an IV (as it is by Karsten's new hidden services
33346 code), this assumption no longer holds. Bugfix on 0.1.2.x.
33347 - Resume listing "AUTHORITY" flag for authorities in network status.
33348 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
33350 o Code simplifications and refactoring:
33351 - Revamp file-writing logic so we don't need to have the entire
33352 contents of a file in memory at once before we write to disk. Tor,
33354 - Turn "descriptor store" into a full-fledged type.
33355 - Move all NT services code into a separate source file.
33356 - Unify all code that computes medians, percentile elements, etc.
33357 - Get rid of a needless malloc when parsing address policies.
33360 Changes in version 0.1.2.17 - 2007-08-30
33361 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
33362 X bundles. Vidalia 0.0.14 makes authentication required for the
33363 ControlPort in the default configuration, which addresses important
33364 security risks. Everybody who uses Vidalia (or another controller)
33367 In addition, this Tor update fixes major load balancing problems with
33368 path selection, which should speed things up a lot once many people
33371 o Major bugfixes (security):
33372 - We removed support for the old (v0) control protocol. It has been
33373 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
33374 become more of a headache than it's worth.
33376 o Major bugfixes (load balancing):
33377 - When choosing nodes for non-guard positions, weight guards
33378 proportionally less, since they already have enough load. Patch
33380 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
33381 will allow fast Tor servers to get more attention.
33382 - When we're upgrading from an old Tor version, forget our current
33383 guards and pick new ones according to the new weightings. These
33384 three load balancing patches could raise effective network capacity
33385 by a factor of four. Thanks to Mike Perry for measurements.
33387 o Major bugfixes (stream expiration):
33388 - Expire not-yet-successful application streams in all cases if
33389 they've been around longer than SocksTimeout. Right now there are
33390 some cases where the stream will live forever, demanding a new
33391 circuit every 15 seconds. Fixes bug 454; reported by lodger.
33393 o Minor features (controller):
33394 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
33395 is valid before any authentication has been received. It tells
33396 a controller what kind of authentication is expected, and what
33397 protocol is spoken. Implements proposal 119.
33399 o Minor bugfixes (performance):
33400 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
33401 greatly speeding up loading cached-routers from disk on startup.
33402 - Disable sentinel-based debugging for buffer code: we squashed all
33403 the bugs that this was supposed to detect a long time ago, and now
33404 its only effect is to change our buffer sizes from nice powers of
33405 two (which platform mallocs tend to like) to values slightly over
33406 powers of two (which make some platform mallocs sad).
33408 o Minor bugfixes (misc):
33409 - If exit bandwidth ever exceeds one third of total bandwidth, then
33410 use the correct formula to weight exit nodes when choosing paths.
33411 Based on patch from Mike Perry.
33412 - Choose perfectly fairly among routers when choosing by bandwidth and
33413 weighting by fraction of bandwidth provided by exits. Previously, we
33414 would choose with only approximate fairness, and correct ourselves
33415 if we ran off the end of the list.
33416 - If we require CookieAuthentication but we fail to write the
33417 cookie file, we would warn but not exit, and end up in a state
33418 where no controller could authenticate. Now we exit.
33419 - If we require CookieAuthentication, stop generating a new cookie
33420 every time we change any piece of our config.
33421 - Refuse to start with certain directory authority keys, and
33422 encourage people using them to stop.
33423 - Terminate multi-line control events properly. Original patch
33425 - Fix a minor memory leak when we fail to find enough suitable
33426 servers to choose a circuit.
33427 - Stop leaking part of the descriptor when we run into a particularly
33428 unparseable piece of it.
33431 Changes in version 0.2.0.6-alpha - 2007-08-26
33432 This sixth development snapshot features a new Vidalia version in the
33433 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
33434 the ControlPort in the default configuration, which addresses important
33437 In addition, this snapshot fixes major load balancing problems
33438 with path selection, which should speed things up a lot once many
33439 people have upgraded. The directory authorities also use a new
33440 mean-time-between-failure approach to tracking which servers are stable,
33441 rather than just looking at the most recent uptime.
33443 o New directory authorities:
33444 - Set up Tonga as the default bridge directory authority.
33447 - Directory authorities now track servers by weighted
33448 mean-times-between-failures. When we have 4 or more days of data,
33449 use measured MTBF rather than declared uptime to decide whether
33450 to call a router Stable. Implements proposal 108.
33452 o Major bugfixes (load balancing):
33453 - When choosing nodes for non-guard positions, weight guards
33454 proportionally less, since they already have enough load. Patch
33456 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
33457 will allow fast Tor servers to get more attention.
33458 - When we're upgrading from an old Tor version, forget our current
33459 guards and pick new ones according to the new weightings. These
33460 three load balancing patches could raise effective network capacity
33461 by a factor of four. Thanks to Mike Perry for measurements.
33463 o Major bugfixes (descriptor parsing):
33464 - Handle unexpected whitespace better in malformed descriptors. Bug
33465 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
33468 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
33469 GETINFO for Torstat to use until it can switch to using extrainfos.
33470 - Optionally (if built with -DEXPORTMALLINFO) export the output
33471 of mallinfo via http, as tor/mallinfo.txt. Only accessible
33475 - Do not intermix bridge routers with controller-added
33476 routers. (Bugfix on 0.2.0.x)
33477 - Do not fail with an assert when accept() returns an unexpected
33478 address family. Addresses but does not wholly fix bug 483. (Bugfix
33480 - Let directory authorities startup even when they can't generate
33481 a descriptor immediately, e.g. because they don't know their
33483 - Stop putting the authentication cookie in a file called "0"
33484 in your working directory if you don't specify anything for the
33485 new CookieAuthFile option. Reported by Matt Edman.
33486 - Make it possible to read the PROTOCOLINFO response in a way that
33487 conforms to our control-spec. Reported by Matt Edman.
33488 - Fix a minor memory leak when we fail to find enough suitable
33489 servers to choose a circuit. Bugfix on 0.1.2.x.
33490 - Stop leaking part of the descriptor when we run into a particularly
33491 unparseable piece of it. Bugfix on 0.1.2.x.
33492 - Unmap the extrainfo cache file on exit.
33495 Changes in version 0.2.0.5-alpha - 2007-08-19
33496 This fifth development snapshot fixes compilation on Windows again;
33497 fixes an obnoxious client-side bug that slowed things down and put
33498 extra load on the network; gets us closer to using the v3 directory
33499 voting scheme; makes it easier for Tor controllers to use cookie-based
33500 authentication; and fixes a variety of other bugs.
33502 o Removed features:
33503 - Version 1 directories are no longer generated in full. Instead,
33504 authorities generate and serve "stub" v1 directories that list
33505 no servers. This will stop Tor versions 0.1.0.x and earlier from
33506 working, but (for security reasons) nobody should be running those
33509 o Major bugfixes (compilation, 0.2.0.x):
33510 - Try to fix Win32 compilation again: improve checking for IPv6 types.
33511 - Try to fix MSVC compilation: build correctly on platforms that do
33512 not define s6_addr16 or s6_addr32.
33513 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
33516 o Major bugfixes (stream expiration):
33517 - Expire not-yet-successful application streams in all cases if
33518 they've been around longer than SocksTimeout. Right now there are
33519 some cases where the stream will live forever, demanding a new
33520 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
33521 reported by lodger.
33523 o Minor features (directory servers):
33524 - When somebody requests a list of statuses or servers, and we have
33525 none of those, return a 404 rather than an empty 200.
33527 o Minor features (directory voting):
33528 - Store v3 consensus status consensuses on disk, and reload them
33531 o Minor features (security):
33532 - Warn about unsafe ControlPort configurations.
33533 - Refuse to start with certain directory authority keys, and
33534 encourage people using them to stop.
33536 o Minor features (controller):
33537 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
33538 is valid before any authentication has been received. It tells
33539 a controller what kind of authentication is expected, and what
33540 protocol is spoken. Implements proposal 119.
33541 - New config option CookieAuthFile to choose a new location for the
33542 cookie authentication file, and config option
33543 CookieAuthFileGroupReadable to make it group-readable.
33545 o Minor features (unit testing):
33546 - Add command-line arguments to unit-test executable so that we can
33547 invoke any chosen test from the command line rather than having
33548 to run the whole test suite at once; and so that we can turn on
33549 logging for the unit tests.
33551 o Minor bugfixes (on 0.1.2.x):
33552 - If we require CookieAuthentication but we fail to write the
33553 cookie file, we would warn but not exit, and end up in a state
33554 where no controller could authenticate. Now we exit.
33555 - If we require CookieAuthentication, stop generating a new cookie
33556 every time we change any piece of our config.
33557 - When loading bandwidth history, do not believe any information in
33558 the future. Fixes bug 434.
33559 - When loading entry guard information, do not believe any information
33561 - When we have our clock set far in the future and generate an
33562 onion key, then re-set our clock to be correct, we should not stop
33563 the onion key from getting rotated.
33564 - Clean up torrc sample config file.
33565 - Do not automatically run configure from autogen.sh. This
33566 non-standard behavior tended to annoy people who have built other
33569 o Minor bugfixes (on 0.2.0.x):
33570 - Fix a bug with AutomapHostsOnResolve that would always cause
33571 the second request to fail. Bug reported by Kate. Bugfix on
33573 - Fix a bug in ADDRMAP controller replies that would sometimes
33574 try to print a NULL. Patch from tup.
33575 - Read v3 directory authority keys from the right location.
33576 - Numerous bugfixes to directory voting code.
33579 Changes in version 0.1.2.16 - 2007-08-01
33580 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
33581 remote attacker in certain situations to rewrite the user's torrc
33582 configuration file. This can completely compromise anonymity of users
33583 in most configurations, including those running the Vidalia bundles,
33584 TorK, etc. Or worse.
33586 o Major security fixes:
33587 - Close immediately after missing authentication on control port;
33588 do not allow multiple authentication attempts.
33591 Changes in version 0.2.0.4-alpha - 2007-08-01
33592 This fourth development snapshot fixes a critical security vulnerability
33593 for most users, specifically those running Vidalia, TorK, etc. Everybody
33594 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
33596 o Major security fixes:
33597 - Close immediately after missing authentication on control port;
33598 do not allow multiple authentication attempts.
33600 o Major bugfixes (compilation):
33601 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
33604 o Minor features (performance):
33605 - Be even more aggressive about releasing RAM from small
33606 empty buffers. Thanks to our free-list code, this shouldn't be too
33607 performance-intensive.
33608 - Disable sentinel-based debugging for buffer code: we squashed all
33609 the bugs that this was supposed to detect a long time ago, and
33610 now its only effect is to change our buffer sizes from nice
33611 powers of two (which platform mallocs tend to like) to values
33612 slightly over powers of two (which make some platform mallocs sad).
33613 - Log malloc statistics from mallinfo() on platforms where it
33617 Changes in version 0.2.0.3-alpha - 2007-07-29
33618 This third development snapshot introduces new experimental
33619 blocking-resistance features and a preliminary version of the v3
33620 directory voting design, and includes many other smaller features
33624 - The first pieces of our "bridge" design for blocking-resistance
33625 are implemented. People can run bridge directory authorities;
33626 people can run bridges; and people can configure their Tor clients
33627 with a set of bridges to use as the first hop into the Tor network.
33628 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
33630 - Create listener connections before we setuid to the configured
33631 User and Group. Now non-Windows users can choose port values
33632 under 1024, start Tor as root, and have Tor bind those ports
33633 before it changes to another UID. (Windows users could already
33635 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
33636 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
33637 on "vserver" accounts. (Patch from coderman.)
33638 - Be even more aggressive about separating local traffic from relayed
33639 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
33641 o Major features (experimental):
33642 - First cut of code for "v3 dir voting": directory authorities will
33643 vote on a common network status document rather than each publishing
33644 their own opinion. This code needs more testing and more corner-case
33645 handling before it's ready for use.
33648 - Directory authorities now call routers Fast if their bandwidth is
33649 at least 100KB/s, and consider their bandwidth adequate to be a
33650 Guard if it is at least 250KB/s, no matter the medians. This fix
33651 complements proposal 107. [Bugfix on 0.1.2.x]
33652 - Directory authorities now never mark more than 3 servers per IP as
33653 Valid and Running. (Implements proposal 109, by Kevin Bauer and
33655 - Minor change to organizationName and commonName generation
33656 procedures in TLS certificates during Tor handshakes, to invalidate
33657 some earlier censorware approaches. This is not a long-term
33658 solution, but applying it will give us a bit of time to look into
33659 the epidemiology of countermeasures as they spread.
33661 o Major bugfixes (directory):
33662 - Rewrite directory tokenization code to never run off the end of
33663 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
33665 o Minor features (controller):
33666 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
33667 match requests to applications. (Patch from Robert Hogan.)
33668 - Report address and port correctly on connections to DNSPort. (Patch
33669 from Robert Hogan.)
33670 - Add a RESOLVE command to launch hostname lookups. (Original patch
33671 from Robert Hogan.)
33672 - Add GETINFO status/enough-dir-info to let controllers tell whether
33673 Tor has downloaded sufficient directory information. (Patch
33675 - You can now use the ControlSocket option to tell Tor to listen for
33676 controller connections on Unix domain sockets on systems that
33677 support them. (Patch from Peter Palfrader.)
33678 - STREAM NEW events are generated for DNSPort requests and for
33679 tunneled directory connections. (Patch from Robert Hogan.)
33680 - New "GETINFO address-mappings/*" command to get address mappings
33681 with expiry information. "addr-mappings/*" is now deprecated.
33684 o Minor features (misc):
33685 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
33687 - The tor-gencert tool for v3 directory authorities now creates all
33688 files as readable to the file creator only, and write-protects
33689 the authority identity key.
33690 - When dumping memory usage, list bytes used in buffer memory
33692 - When running with dmalloc, dump more stats on hup and on exit.
33693 - Directory authorities now fail quickly and (relatively) harmlessly
33694 if they generate a network status document that is somehow
33697 o Traffic load balancing improvements:
33698 - If exit bandwidth ever exceeds one third of total bandwidth, then
33699 use the correct formula to weight exit nodes when choosing paths.
33700 (Based on patch from Mike Perry.)
33701 - Choose perfectly fairly among routers when choosing by bandwidth and
33702 weighting by fraction of bandwidth provided by exits. Previously, we
33703 would choose with only approximate fairness, and correct ourselves
33704 if we ran off the end of the list. [Bugfix on 0.1.2.x]
33706 o Performance improvements:
33707 - Be more aggressive with freeing buffer RAM or putting it on the
33709 - Use Critical Sections rather than Mutexes for synchronizing threads
33710 on win32; Mutexes are heavier-weight, and designed for synchronizing
33713 o Deprecated and removed features:
33714 - RedirectExits is now deprecated.
33715 - Stop allowing address masks that do not correspond to bit prefixes.
33716 We have warned about these for a really long time; now it's time
33717 to reject them. (Patch from croup.)
33719 o Minor bugfixes (directory):
33720 - Fix another crash bug related to extra-info caching. (Bug found by
33721 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
33722 - Directories no longer return a "304 not modified" when they don't
33723 have the networkstatus the client asked for. Also fix a memory
33724 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
33725 - We had accidentally labelled 0.1.2.x directory servers as not
33726 suitable for begin_dir requests, and had labelled no directory
33727 servers as suitable for uploading extra-info documents. [Bugfix
33730 o Minor bugfixes (dns):
33731 - Fix a crash when DNSPort is set more than once. (Patch from Robert
33732 Hogan.) [Bugfix on 0.2.0.2-alpha]
33733 - Add DNSPort connections to the global connection list, so that we
33734 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
33736 - Fix a dangling reference that could lead to a crash when DNSPort is
33737 changed or closed (Patch from Robert Hogan.) [Bugfix on
33740 o Minor bugfixes (controller):
33741 - Provide DNS expiry times in GMT, not in local time. For backward
33742 compatibility, ADDRMAP events only provide GMT expiry in an extended
33743 field. "GETINFO address-mappings" always does the right thing.
33744 - Use CRLF line endings properly in NS events.
33745 - Terminate multi-line control events properly. (Original patch
33746 from tup.) [Bugfix on 0.1.2.x-alpha]
33747 - Do not include spaces in SOURCE_ADDR fields in STREAM
33748 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
33751 Changes in version 0.1.2.15 - 2007-07-17
33752 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
33753 problems, fixes compilation on BSD, and fixes a variety of other
33754 bugs. Everybody should upgrade.
33756 o Major bugfixes (compilation):
33757 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
33759 o Major bugfixes (crashes):
33760 - Try even harder not to dereference the first character after
33761 an mmap(). Reported by lodger.
33762 - Fix a crash bug in directory authorities when we re-number the
33763 routerlist while inserting a new router.
33764 - When the cached-routers file is an even multiple of the page size,
33765 don't run off the end and crash. (Fixes bug 455; based on idea
33767 - Fix eventdns.c behavior on Solaris: It is critical to include
33768 orconfig.h _before_ sys/types.h, so that we can get the expected
33769 definition of _FILE_OFFSET_BITS.
33771 o Major bugfixes (security):
33772 - Fix a possible buffer overrun when using BSD natd support. Bug
33774 - When sending destroy cells from a circuit's origin, don't include
33775 the reason for tearing down the circuit. The spec says we didn't,
33776 and now we actually don't. Reported by lodger.
33777 - Keep streamids from different exits on a circuit separate. This
33778 bug may have allowed other routers on a given circuit to inject
33779 cells into streams. Reported by lodger; fixes bug 446.
33780 - If there's a never-before-connected-to guard node in our list,
33781 never choose any guards past it. This way we don't expand our
33782 guard list unless we need to.
33784 o Minor bugfixes (guard nodes):
33785 - Weight guard selection by bandwidth, so that low-bandwidth nodes
33786 don't get overused as guards.
33788 o Minor bugfixes (directory):
33789 - Correctly count the number of authorities that recommend each
33790 version. Previously, we were under-counting by 1.
33791 - Fix a potential crash bug when we load many server descriptors at
33792 once and some of them make others of them obsolete. Fixes bug 458.
33794 o Minor bugfixes (hidden services):
33795 - Stop tearing down the whole circuit when the user asks for a
33796 connection to a port that the hidden service didn't configure.
33799 o Minor bugfixes (misc):
33800 - On Windows, we were preventing other processes from reading
33801 cached-routers while Tor was running. Reported by janbar.
33802 - Fix a possible (but very unlikely) bug in picking routers by
33803 bandwidth. Add a log message to confirm that it is in fact
33804 unlikely. Patch from lodger.
33805 - Backport a couple of memory leak fixes.
33806 - Backport miscellaneous cosmetic bugfixes.
33809 Changes in version 0.2.0.2-alpha - 2007-06-02
33810 o Major bugfixes on 0.2.0.1-alpha:
33811 - Fix an assertion failure related to servers without extra-info digests.
33812 Resolves bugs 441 and 442.
33814 o Minor features (directory):
33815 - Support "If-Modified-Since" when answering HTTP requests for
33816 directories, running-routers documents, and network-status documents.
33817 (There's no need to support it for router descriptors, since those
33818 are downloaded by descriptor digest.)
33820 o Minor build issues:
33821 - Clear up some MIPSPro compiler warnings.
33822 - When building from a tarball on a machine that happens to have SVK
33823 installed, report the micro-revision as whatever version existed
33824 in the tarball, not as "x".
33827 Changes in version 0.2.0.1-alpha - 2007-06-01
33828 This early development snapshot provides new features for people running
33829 Tor as both a client and a server (check out the new RelayBandwidth
33830 config options); lets Tor run as a DNS proxy; and generally moves us
33831 forward on a lot of fronts.
33833 o Major features, server usability:
33834 - New config options RelayBandwidthRate and RelayBandwidthBurst:
33835 a separate set of token buckets for relayed traffic. Right now
33836 relayed traffic is defined as answers to directory requests, and
33837 OR connections that don't have any local circuits on them.
33839 o Major features, client usability:
33840 - A client-side DNS proxy feature to replace the need for
33841 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
33842 for DNS requests on port 9999, use the Tor network to resolve them
33843 anonymously, and send the reply back like a regular DNS server.
33844 The code still only implements a subset of DNS.
33845 - Make PreferTunneledDirConns and TunnelDirConns work even when
33846 we have no cached directory info. This means Tor clients can now
33847 do all of their connections protected by TLS.
33849 o Major features, performance and efficiency:
33850 - Directory authorities accept and serve "extra info" documents for
33851 routers. These documents contain fields from router descriptors
33852 that aren't usually needed, and that use a lot of excess
33853 bandwidth. Once these fields are removed from router descriptors,
33854 the bandwidth savings should be about 60%. [Partially implements
33856 - Servers upload extra-info documents to any authority that accepts
33857 them. Authorities (and caches that have been configured to download
33858 extra-info documents) download them as needed. [Partially implements
33860 - Change the way that Tor buffers data that it is waiting to write.
33861 Instead of queueing data cells in an enormous ring buffer for each
33862 client->OR or OR->OR connection, we now queue cells on a separate
33863 queue for each circuit. This lets us use less slack memory, and
33864 will eventually let us be smarter about prioritizing different kinds
33866 - Use memory pools to allocate cells with better speed and memory
33867 efficiency, especially on platforms where malloc() is inefficient.
33868 - Stop reading on edge connections when their corresponding circuit
33869 buffers are full; start again as the circuits empty out.
33871 o Major features, other:
33872 - Add an HSAuthorityRecordStats option that hidden service authorities
33873 can use to track statistics of overall hidden service usage without
33874 logging information that would be very useful to an attacker.
33875 - Start work implementing multi-level keys for directory authorities:
33876 Add a standalone tool to generate key certificates. (Proposal 103.)
33879 - Directory authorities now call routers Stable if they have an
33880 uptime of at least 30 days, even if that's not the median uptime
33881 in the network. Implements proposal 107, suggested by Kevin Bauer
33884 o Minor fixes (resource management):
33885 - Count the number of open sockets separately from the number
33886 of active connection_t objects. This will let us avoid underusing
33887 our allocated connection limit.
33888 - We no longer use socket pairs to link an edge connection to an
33889 anonymous directory connection or a DirPort test connection.
33890 Instead, we track the link internally and transfer the data
33891 in-process. This saves two sockets per "linked" connection (at the
33892 client and at the server), and avoids the nasty Windows socketpair()
33894 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
33895 for every single inactive connection_t. Free items from the
33896 4k/16k-buffer free lists when they haven't been used for a while.
33898 o Minor features (build):
33899 - Make autoconf search for libevent, openssl, and zlib consistently.
33900 - Update deprecated macros in configure.in.
33901 - When warning about missing headers, tell the user to let us
33902 know if the compile succeeds anyway, so we can downgrade the
33904 - Include the current subversion revision as part of the version
33905 string: either fetch it directly if we're in an SVN checkout, do
33906 some magic to guess it if we're in an SVK checkout, or use
33907 the last-detected version if we're building from a .tar.gz.
33908 Use this version consistently in log messages.
33910 o Minor features (logging):
33911 - Always prepend "Bug: " to any log message about a bug.
33912 - Put a platform string (e.g. "Linux i686") in the startup log
33913 message, so when people paste just their logs, we know if it's
33914 OpenBSD or Windows or what.
33915 - When logging memory usage, break down memory used in buffers by
33918 o Minor features (directory system):
33919 - New config option V2AuthoritativeDirectory that all directory
33920 authorities should set. This will let future authorities choose
33921 not to serve V2 directory information.
33922 - Directory authorities allow multiple router descriptors and/or extra
33923 info documents to be uploaded in a single go. This will make
33924 implementing proposal 104 simpler.
33926 o Minor features (controller):
33927 - Add a new config option __DisablePredictedCircuits designed for
33928 use by the controller, when we don't want Tor to build any circuits
33930 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
33931 so we can exit from the middle of the circuit.
33932 - Implement "getinfo status/circuit-established".
33933 - Implement "getinfo status/version/..." so a controller can tell
33934 whether the current version is recommended, and whether any versions
33935 are good, and how many authorities agree. (Patch from shibz.)
33937 o Minor features (hidden services):
33938 - Allow multiple HiddenServicePort directives with the same virtual
33939 port; when they occur, the user is sent round-robin to one
33940 of the target ports chosen at random. Partially fixes bug 393 by
33941 adding limited ad-hoc round-robining.
33943 o Minor features (other):
33945 - Add a new AutomapHostsOnResolve option: when it is enabled, any
33946 resolve request for hosts matching a given pattern causes Tor to
33947 generate an internal virtual address mapping for that host. This
33948 allows DNSPort to work sensibly with hidden service users. By
33949 default, .exit and .onion addresses are remapped; the list of
33950 patterns can be reconfigured with AutomapHostsSuffixes.
33951 - Add an "-F" option to tor-resolve to force a resolve for a .onion
33952 address. Thanks to the AutomapHostsOnResolve option, this is no
33953 longer a completely silly thing to do.
33954 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
33955 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
33956 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
33957 minus 1 byte: the actual maximum declared bandwidth.
33959 o Removed features:
33960 - Removed support for the old binary "version 0" controller protocol.
33961 This has been deprecated since 0.1.1, and warnings have been issued
33962 since 0.1.2. When we encounter a v0 control message, we now send
33963 back an error and close the connection.
33964 - Remove the old "dns worker" server DNS code: it hasn't been default
33965 since 0.1.2.2-alpha, and all the servers seem to be using the new
33968 o Minor bugfixes (portability):
33969 - Even though Windows is equally happy with / and \ as path separators,
33970 try to use \ consistently on Windows and / consistently on Unix: it
33971 makes the log messages nicer.
33972 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
33973 - Read resolv.conf files correctly on platforms where read() returns
33974 partial results on small file reads.
33976 o Minor bugfixes (directory):
33977 - Correctly enforce that elements of directory objects do not appear
33978 more often than they are allowed to appear.
33979 - When we are reporting the DirServer line we just parsed, we were
33980 logging the second stanza of the key fingerprint, not the first.
33982 o Minor bugfixes (logging):
33983 - When we hit an EOF on a log (probably because we're shutting down),
33984 don't try to remove the log from the list: just mark it as
33985 unusable. (Bulletproofs against bug 222.)
33987 o Minor bugfixes (other):
33988 - In the exitlist script, only consider the most recently published
33989 server descriptor for each server. Also, when the user requests
33990 a list of servers that _reject_ connections to a given address,
33991 explicitly exclude the IPs that also have servers that accept
33992 connections to that address. (Resolves bug 405.)
33993 - Stop allowing hibernating servers to be "stable" or "fast".
33994 - On Windows, we were preventing other processes from reading
33995 cached-routers while Tor was running. (Reported by janbar)
33996 - Make the NodeFamilies config option work. (Reported by
33997 lodger -- it has never actually worked, even though we added it
33999 - Check return values from pthread_mutex functions.
34000 - Don't save non-general-purpose router descriptors to the disk cache,
34001 because we have no way of remembering what their purpose was when
34003 - Add even more asserts to hunt down bug 417.
34004 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
34005 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
34006 Add a log message to confirm that it is in fact unlikely.
34008 o Minor bugfixes (controller):
34009 - Make 'getinfo fingerprint' return a 551 error if we're not a
34010 server, so we match what the control spec claims we do. Reported
34012 - Fix a typo in an error message when extendcircuit fails that
34013 caused us to not follow the \r\n-based delimiter protocol. Reported
34016 o Code simplifications and refactoring:
34017 - Stop passing around circuit_t and crypt_path_t pointers that are
34018 implicit in other procedure arguments.
34019 - Drop the old code to choke directory connections when the
34020 corresponding OR connections got full: thanks to the cell queue
34021 feature, OR conns don't get full any more.
34022 - Make dns_resolve() handle attaching connections to circuits
34023 properly, so the caller doesn't have to.
34024 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
34025 - Keep the connection array as a dynamic smartlist_t, rather than as
34026 a fixed-sized array. This is important, as the number of connections
34027 is becoming increasingly decoupled from the number of sockets.
34030 Changes in version 0.1.2.14 - 2007-05-25
34031 Tor 0.1.2.14 changes the addresses of two directory authorities (this
34032 change especially affects those who serve or use hidden services),
34033 and fixes several other crash- and security-related bugs.
34035 o Directory authority changes:
34036 - Two directory authorities (moria1 and moria2) just moved to new
34037 IP addresses. This change will particularly affect those who serve
34038 or use hidden services.
34040 o Major bugfixes (crashes):
34041 - If a directory server runs out of space in the connection table
34042 as it's processing a begin_dir request, it will free the exit stream
34043 but leave it attached to the circuit, leading to unpredictable
34044 behavior. (Reported by seeess, fixes bug 425.)
34045 - Fix a bug in dirserv_remove_invalid() that would cause authorities
34046 to corrupt memory under some really unlikely scenarios.
34047 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
34048 - Avoid segfaults when reading from mmaped descriptor file. (Reported
34051 o Major bugfixes (security):
34052 - When choosing an entry guard for a circuit, avoid using guards
34053 that are in the same family as the chosen exit -- not just guards
34054 that are exactly the chosen exit. (Reported by lodger.)
34056 o Major bugfixes (resource management):
34057 - If a directory authority is down, skip it when deciding where to get
34058 networkstatus objects or descriptors. Otherwise we keep asking
34059 every 10 seconds forever. Fixes bug 384.
34060 - Count it as a failure if we fetch a valid network-status but we
34061 don't want to keep it. Otherwise we'll keep fetching it and keep
34062 not wanting to keep it. Fixes part of bug 422.
34063 - If all of our dirservers have given us bad or no networkstatuses
34064 lately, then stop hammering them once per minute even when we
34065 think they're failed. Fixes another part of bug 422.
34068 - Actually set the purpose correctly for descriptors inserted with
34069 purpose=controller.
34070 - When we have k non-v2 authorities in our DirServer config,
34071 we ignored the last k authorities in the list when updating our
34073 - Correctly back-off from requesting router descriptors that we are
34074 having a hard time downloading.
34075 - Read resolv.conf files correctly on platforms where read() returns
34076 partial results on small file reads.
34077 - Don't rebuild the entire router store every time we get 32K of
34078 routers: rebuild it when the journal gets very large, or when
34079 the gaps in the store get very large.
34082 - When routers publish SVN revisions in their router descriptors,
34083 authorities now include those versions correctly in networkstatus
34085 - Warn when using a version of libevent before 1.3b to run a server on
34086 OSX or BSD: these versions interact badly with userspace threads.
34089 Changes in version 0.1.2.13 - 2007-04-24
34090 This release features some major anonymity fixes, such as safer path
34091 selection; better client performance; faster bootstrapping, better
34092 address detection, and better DNS support for servers; write limiting as
34093 well as read limiting to make servers easier to run; and a huge pile of
34094 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
34096 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
34097 of the Freenode IRC network, remembering his patience and vision for
34098 free speech on the Internet.
34101 - Fix a memory leak when we ask for "all" networkstatuses and we
34102 get one we don't recognize.
34103 - Add more asserts to hunt down bug 417.
34104 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
34107 Changes in version 0.1.2.12-rc - 2007-03-16
34109 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
34110 directory information requested inside Tor connections (i.e. via
34111 begin_dir cells). It only triggered when the same connection was
34112 serving other data at the same time. Reported by seeess.
34115 - When creating a circuit via the controller, send a 'launched'
34116 event when we're done, so we follow the spec better.
34119 Changes in version 0.1.2.11-rc - 2007-03-15
34120 o Minor bugfixes (controller), reported by daejees:
34121 - Correct the control spec to match how the code actually responds
34122 to 'getinfo addr-mappings/*'.
34123 - The control spec described a GUARDS event, but the code
34124 implemented a GUARD event. Standardize on GUARD, but let people
34125 ask for GUARDS too.
34128 Changes in version 0.1.2.10-rc - 2007-03-07
34129 o Major bugfixes (Windows):
34130 - Do not load the NT services library functions (which may not exist)
34131 just to detect if we're a service trying to shut down. Now we run
34132 on Win98 and friends again.
34134 o Minor bugfixes (other):
34135 - Clarify a couple of log messages.
34136 - Fix a misleading socks5 error number.
34139 Changes in version 0.1.2.9-rc - 2007-03-02
34140 o Major bugfixes (Windows):
34141 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
34142 of the usual GCC "%llu". This prevents a bug when saving 64-bit
34143 int configuration values: the high-order 32 bits would get
34144 truncated. In particular, we were being bitten by the default
34145 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
34146 and maybe also bug 397.)
34148 o Minor bugfixes (performance):
34149 - Use OpenSSL's AES implementation on platforms where it's faster.
34150 This could save us as much as 10% CPU usage.
34152 o Minor bugfixes (server):
34153 - Do not rotate onion key immediately after setting it for the first
34156 o Minor bugfixes (directory authorities):
34157 - Stop calling servers that have been hibernating for a long time
34158 "stable". Also, stop letting hibernating or obsolete servers affect
34159 uptime and bandwidth cutoffs.
34160 - Stop listing hibernating servers in the v1 directory.
34162 o Minor bugfixes (hidden services):
34163 - Upload hidden service descriptors slightly less often, to reduce
34164 load on authorities.
34166 o Minor bugfixes (other):
34167 - Fix an assert that could trigger if a controller quickly set then
34168 cleared EntryNodes. Bug found by Udo van den Heuvel.
34169 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
34171 - Fix a potential race condition in the rpm installer. Found by
34173 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
34174 of 2 as indicating that the server is completely bad; it sometimes
34175 means that the server is just bad for the request in question. (may fix
34176 the last of bug 326.)
34177 - Disable encrypted directory connections when we don't have a server
34178 descriptor for the destination. We'll get this working again in
34182 Changes in version 0.1.2.8-beta - 2007-02-26
34183 o Major bugfixes (crashes):
34184 - Stop crashing when the controller asks us to resetconf more than
34185 one config option at once. (Vidalia 0.0.11 does this.)
34186 - Fix a crash that happened on Win98 when we're given command-line
34187 arguments: don't try to load NT service functions from advapi32.dll
34188 except when we need them. (Bug introduced in 0.1.2.7-alpha;
34190 - Fix a longstanding obscure crash bug that could occur when
34191 we run out of DNS worker processes. (Resolves bug 390.)
34193 o Major bugfixes (hidden services):
34194 - Correctly detect whether hidden service descriptor downloads are
34195 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
34197 o Major bugfixes (accounting):
34198 - When we start during an accounting interval before it's time to wake
34199 up, remember to wake up at the correct time. (May fix bug 342.)
34201 o Minor bugfixes (controller):
34202 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
34203 clear the corresponding on_circuit variable, and remember later
34204 that we don't need to send a redundant CLOSED event. Resolves part
34206 - Report events where a resolve succeeded or where we got a socks
34207 protocol error correctly, rather than calling both of them
34209 - Change reported stream target addresses to IP consistently when
34210 we finally get the IP from an exit node.
34211 - Send log messages to the controller even if they happen to be very
34214 o Minor bugfixes (other):
34215 - Display correct results when reporting which versions are
34216 recommended, and how recommended they are. (Resolves bug 383.)
34217 - Improve our estimates for directory bandwidth to be less random:
34218 guess that an unrecognized directory will have the average bandwidth
34219 from all known directories, not that it will have the average
34220 bandwidth from those directories earlier than it on the list.
34221 - If we start a server with ClientOnly 1, then set ClientOnly to 0
34222 and hup, stop triggering an assert based on an empty onion_key.
34223 - On platforms with no working mmap() equivalent, don't warn the
34224 user when cached-routers doesn't exist.
34225 - Warn the user when mmap() [or its equivalent] fails for some reason
34226 other than file-not-found.
34227 - Don't warn the user when cached-routers.new doesn't exist: that's
34228 perfectly fine when starting up for the first time.
34229 - When EntryNodes are configured, rebuild the guard list to contain,
34230 in order: the EntryNodes that were guards before; the rest of the
34231 EntryNodes; the nodes that were guards before.
34232 - Mask out all signals in sub-threads; only the libevent signal
34233 handler should be processing them. This should prevent some crashes
34234 on some machines using pthreads. (Patch from coderman.)
34235 - Fix switched arguments on memset in the implementation of
34236 tor_munmap() for systems with no mmap() call.
34237 - When Tor receives a router descriptor that it asked for, but
34238 no longer wants (because it has received fresh networkstatuses
34239 in the meantime), do not warn the user. Cache the descriptor if
34240 we're a cache; drop it if we aren't.
34241 - Make earlier entry guards _really_ get retried when the network
34243 - On a malformed DNS reply, always give an error to the corresponding
34245 - Build with recent libevents on platforms that do not define the
34246 nonstandard types "u_int8_t" and friends.
34248 o Minor features (controller):
34249 - Warn the user when an application uses the obsolete binary v0
34250 control protocol. We're planning to remove support for it during
34251 the next development series, so it's good to give people some
34253 - Add STREAM_BW events to report per-entry-stream bandwidth
34254 use. (Patch from Robert Hogan.)
34255 - Rate-limit SIGNEWNYM signals in response to controllers that
34256 impolitely generate them for every single stream. (Patch from
34257 mwenge; closes bug 394.)
34258 - Make REMAP stream events have a SOURCE (cache or exit), and
34259 make them generated in every case where we get a successful
34260 connected or resolved cell.
34262 o Minor bugfixes (performance):
34263 - Call router_have_min_dir_info half as often. (This is showing up in
34264 some profiles, but not others.)
34265 - When using GCC, make log_debug never get called at all, and its
34266 arguments never get evaluated, when no debug logs are configured.
34267 (This is showing up in some profiles, but not others.)
34270 - Remove some never-implemented options. Mark PathlenCoinWeight as
34272 - Implement proposal 106: Stop requiring clients to have well-formed
34273 certificates; stop checking nicknames in certificates. (Clients
34274 have certificates so that they can look like Tor servers, but in
34275 the future we might want to allow them to look like regular TLS
34276 clients instead. Nicknames in certificates serve no purpose other
34277 than making our protocol easier to recognize on the wire.)
34278 - Revise messages on handshake failure again to be even more clear about
34279 which are incoming connections and which are outgoing.
34280 - Discard any v1 directory info that's over 1 month old (for
34281 directories) or over 1 week old (for running-routers lists).
34282 - Do not warn when individual nodes in the configuration's EntryNodes,
34283 ExitNodes, etc are down: warn only when all possible nodes
34284 are down. (Fixes bug 348.)
34285 - Always remove expired routers and networkstatus docs before checking
34286 whether we have enough information to build circuits. (Fixes
34288 - Put a lower-bound on MaxAdvertisedBandwidth.
34291 Changes in version 0.1.2.7-alpha - 2007-02-06
34292 o Major bugfixes (rate limiting):
34293 - Servers decline directory requests much more aggressively when
34294 they're low on bandwidth. Otherwise they end up queueing more and
34295 more directory responses, which can't be good for latency.
34296 - But never refuse directory requests from local addresses.
34297 - Fix a memory leak when sending a 503 response for a networkstatus
34299 - Be willing to read or write on local connections (e.g. controller
34300 connections) even when the global rate limiting buckets are empty.
34301 - If our system clock jumps back in time, don't publish a negative
34302 uptime in the descriptor. Also, don't let the global rate limiting
34303 buckets go absurdly negative.
34304 - Flush local controller connection buffers periodically as we're
34305 writing to them, so we avoid queueing 4+ megabytes of data before
34308 o Major bugfixes (NT services):
34309 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
34310 command-line flag so that admins can override the default by saying
34311 "tor --service install --user "SomeUser"". This will not affect
34312 existing installed services. Also, warn the user that the service
34313 will look for its configuration file in the service user's
34314 %appdata% directory. (We can't do the 'hardwire the user's appdata
34315 directory' trick any more, since we may not have read access to that
34318 o Major bugfixes (other):
34319 - Previously, we would cache up to 16 old networkstatus documents
34320 indefinitely, if they came from nontrusted authorities. Now we
34321 discard them if they are more than 10 days old.
34322 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
34324 - Detect and reject malformed DNS responses containing circular
34326 - If exits are rare enough that we're not marking exits as guards,
34327 ignore exit bandwidth when we're deciding the required bandwidth
34329 - When we're handling a directory connection tunneled over Tor,
34330 don't fill up internal memory buffers with all the data we want
34331 to tunnel; instead, only add it if the OR connection that will
34332 eventually receive it has some room for it. (This can lead to
34333 slowdowns in tunneled dir connections; a better solution will have
34334 to wait for 0.2.0.)
34336 o Minor bugfixes (dns):
34337 - Add some defensive programming to eventdns.c in an attempt to catch
34338 possible memory-stomping bugs.
34339 - Detect and reject DNS replies containing IPv4 or IPv6 records with
34340 an incorrect number of bytes. (Previously, we would ignore the
34342 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
34343 in the correct order, and doesn't crash.
34344 - Free memory held in recently-completed DNS lookup attempts on exit.
34345 This was not a memory leak, but may have been hiding memory leaks.
34346 - Handle TTL values correctly on reverse DNS lookups.
34347 - Treat failure to parse resolv.conf as an error.
34349 o Minor bugfixes (other):
34350 - Fix crash with "tor --list-fingerprint" (reported by seeess).
34351 - When computing clock skew from directory HTTP headers, consider what
34352 time it was when we finished asking for the directory, not what
34354 - Expire socks connections if they spend too long waiting for the
34355 handshake to finish. Previously we would let them sit around for
34356 days, if the connecting application didn't close them either.
34357 - And if the socks handshake hasn't started, don't send a
34358 "DNS resolve socks failed" handshake reply; just close it.
34359 - Stop using C functions that OpenBSD's linker doesn't like.
34360 - Don't launch requests for descriptors unless we have networkstatuses
34361 from at least half of the authorities. This delays the first
34362 download slightly under pathological circumstances, but can prevent
34363 us from downloading a bunch of descriptors we don't need.
34364 - Do not log IPs with TLS failures for incoming TLS
34365 connections. (Fixes bug 382.)
34366 - If the user asks to use invalid exit nodes, be willing to use
34368 - Stop using the reserved ac_cv namespace in our configure script.
34369 - Call stat() slightly less often; use fstat() when possible.
34370 - Refactor the way we handle pending circuits when an OR connection
34371 completes or fails, in an attempt to fix a rare crash bug.
34372 - Only rewrite a conn's address based on X-Forwarded-For: headers
34373 if it's a parseable public IP address; and stop adding extra quotes
34374 to the resulting address.
34377 - Weight directory requests by advertised bandwidth. Now we can
34378 let servers enable write limiting but still allow most clients to
34379 succeed at their directory requests. (We still ignore weights when
34380 choosing a directory authority; I hope this is a feature.)
34383 - Create a new file ReleaseNotes which was the old ChangeLog. The
34384 new ChangeLog file now includes the summaries for all development
34386 - Check for addresses with invalid characters at the exit as well
34387 as at the client, and warn less verbosely when they fail. You can
34388 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
34389 - Adapt a patch from goodell to let the contrib/exitlist script
34390 take arguments rather than require direct editing.
34391 - Inform the server operator when we decide not to advertise a
34392 DirPort due to AccountingMax enabled or a low BandwidthRate. It
34393 was confusing Zax, so now we're hopefully more helpful.
34394 - Bring us one step closer to being able to establish an encrypted
34395 directory tunnel without knowing a descriptor first. Still not
34396 ready yet. As part of the change, now assume we can use a
34397 create_fast cell if we don't know anything about a router.
34398 - Allow exit nodes to use nameservers running on ports other than 53.
34399 - Servers now cache reverse DNS replies.
34400 - Add an --ignore-missing-torrc command-line option so that we can
34401 get the "use sensible defaults if the configuration file doesn't
34402 exist" behavior even when specifying a torrc location on the command
34405 o Minor features (controller):
34406 - Track reasons for OR connection failure; make these reasons
34407 available via the controller interface. (Patch from Mike Perry.)
34408 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
34409 can learn when clients are sending malformed hostnames to Tor.
34410 - Clean up documentation for controller status events.
34411 - Add a REMAP status to stream events to note that a stream's
34412 address has changed because of a cached address or a MapAddress
34416 Changes in version 0.1.2.6-alpha - 2007-01-09
34418 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
34419 connection handles more than 4 gigs in either direction, we crash.
34420 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
34421 advertised exit node, somebody might try to exit from us when
34422 we're bootstrapping and before we've built our descriptor yet.
34423 Refuse the connection rather than crashing.
34426 - Warn if we (as a server) find that we've resolved an address that we
34427 weren't planning to resolve.
34428 - Warn that using select() on any libevent version before 1.1 will be
34429 unnecessarily slow (even for select()).
34430 - Flush ERR-level controller status events just like we currently
34431 flush ERR-level log events, so that a Tor shutdown doesn't prevent
34432 the controller from learning about current events.
34434 o Minor features (more controller status events):
34435 - Implement EXTERNAL_ADDRESS server status event so controllers can
34436 learn when our address changes.
34437 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
34438 can learn when directories reject our descriptor.
34439 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
34440 can learn when a client application is speaking a non-socks protocol
34442 - Implement DANGEROUS_SOCKS client status event so controllers
34443 can learn when a client application is leaking DNS addresses.
34444 - Implement BUG general status event so controllers can learn when
34445 Tor is unhappy about its internal invariants.
34446 - Implement CLOCK_SKEW general status event so controllers can learn
34447 when Tor thinks the system clock is set incorrectly.
34448 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
34449 server status events so controllers can learn when their descriptors
34450 are accepted by a directory.
34451 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
34452 server status events so controllers can learn about Tor's progress in
34453 deciding whether it's reachable from the outside.
34454 - Implement BAD_LIBEVENT general status event so controllers can learn
34455 when we have a version/method combination in libevent that needs to
34457 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
34458 and DNS_USELESS server status events so controllers can learn
34459 about changes to DNS server status.
34461 o Minor features (directory):
34462 - Authorities no longer recommend exits as guards if this would shift
34463 too much load to the exit nodes.
34466 Changes in version 0.1.2.5-alpha - 2007-01-06
34468 - Enable write limiting as well as read limiting. Now we sacrifice
34469 capacity if we're pushing out lots of directory traffic, rather
34470 than overrunning the user's intended bandwidth limits.
34471 - Include TLS overhead when counting bandwidth usage; previously, we
34472 would count only the bytes sent over TLS, but not the bytes used
34474 - Support running the Tor service with a torrc not in the same
34475 directory as tor.exe and default to using the torrc located in
34476 the %appdata%\Tor\ of the user who installed the service. Patch
34478 - Servers now check for the case when common DNS requests are going to
34479 wildcarded addresses (i.e. all getting the same answer), and change
34480 their exit policy to reject *:* if it's happening.
34481 - Implement BEGIN_DIR cells, so we can connect to the directory
34482 server via TLS to do encrypted directory requests rather than
34483 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
34484 config options if you like.
34486 o Minor features (config and docs):
34487 - Start using the state file to store bandwidth accounting data:
34488 the bw_accounting file is now obsolete. We'll keep generating it
34489 for a while for people who are still using 0.1.2.4-alpha.
34490 - Try to batch changes to the state file so that we do as few
34491 disk writes as possible while still storing important things in
34493 - The state file and the bw_accounting file get saved less often when
34494 the AvoidDiskWrites config option is set.
34495 - Make PIDFile work on Windows (untested).
34496 - Add internal descriptions for a bunch of configuration options:
34497 accessible via controller interface and in comments in saved
34499 - Reject *:563 (NNTPS) in the default exit policy. We already reject
34500 NNTP by default, so this seems like a sensible addition.
34501 - Clients now reject hostnames with invalid characters. This should
34502 avoid some inadvertent info leaks. Add an option
34503 AllowNonRFC953Hostnames to disable this behavior, in case somebody
34504 is running a private network with hosts called @, !, and #.
34505 - Add a maintainer script to tell us which options are missing
34506 documentation: "make check-docs".
34507 - Add a new address-spec.txt document to describe our special-case
34508 addresses: .exit, .onion, and .noconnnect.
34510 o Minor features (DNS):
34511 - Ongoing work on eventdns infrastructure: now it has dns server
34512 and ipv6 support. One day Tor will make use of it.
34513 - Add client-side caching for reverse DNS lookups.
34514 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
34515 - When we change nameservers or IP addresses, reset and re-launch
34516 our tests for DNS hijacking.
34518 o Minor features (directory):
34519 - Authorities now specify server versions in networkstatus. This adds
34520 about 2% to the size of compressed networkstatus docs, and allows
34521 clients to tell which servers support BEGIN_DIR and which don't.
34522 The implementation is forward-compatible with a proposed future
34523 protocol version scheme not tied to Tor versions.
34524 - DirServer configuration lines now have an orport= option so
34525 clients can open encrypted tunnels to the authorities without
34526 having downloaded their descriptors yet. Enabled for moria1,
34527 moria2, tor26, and lefkada now in the default configuration.
34528 - Directory servers are more willing to send a 503 "busy" if they
34529 are near their write limit, especially for v1 directory requests.
34530 Now they can use their limited bandwidth for actual Tor traffic.
34531 - Clients track responses with status 503 from dirservers. After a
34532 dirserver has given us a 503, we try not to use it until an hour has
34533 gone by, or until we have no dirservers that haven't given us a 503.
34534 - When we get a 503 from a directory, and we're not a server, we don't
34535 count the failure against the total number of failures allowed
34536 for the thing we're trying to download.
34537 - Report X-Your-Address-Is correctly from tunneled directory
34538 connections; don't report X-Your-Address-Is when it's an internal
34539 address; and never believe reported remote addresses when they're
34541 - Protect against an unlikely DoS attack on directory servers.
34542 - Add a BadDirectory flag to network status docs so that authorities
34543 can (eventually) tell clients about caches they believe to be
34546 o Minor features (controller):
34547 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
34548 - Reimplement GETINFO so that info/names stays in sync with the
34550 - Implement "GETINFO fingerprint".
34551 - Implement "SETEVENTS GUARD" so controllers can get updates on
34552 entry guard status as it changes.
34554 o Minor features (clean up obsolete pieces):
34555 - Remove some options that have been deprecated since at least
34556 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
34557 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
34558 to set log options.
34559 - We no longer look for identity and onion keys in "identity.key" and
34560 "onion.key" -- these were replaced by secret_id_key and
34561 secret_onion_key in 0.0.8pre1.
34562 - We no longer require unrecognized directory entries to be
34565 o Major bugfixes (security):
34566 - Stop sending the HttpProxyAuthenticator string to directory
34567 servers when directory connections are tunnelled through Tor.
34568 - Clients no longer store bandwidth history in the state file.
34569 - Do not log introduction points for hidden services if SafeLogging
34571 - When generating bandwidth history, round down to the nearest
34572 1k. When storing accounting data, round up to the nearest 1k.
34573 - When we're running as a server, remember when we last rotated onion
34574 keys, so that we will rotate keys once they're a week old even if
34575 we never stay up for a week ourselves.
34577 o Major bugfixes (other):
34578 - Fix a longstanding bug in eventdns that prevented the count of
34579 timed-out resolves from ever being reset. This bug caused us to
34580 give up on a nameserver the third time it timed out, and try it
34581 10 seconds later... and to give up on it every time it timed out
34583 - Take out the '5 second' timeout from the connection retry
34584 schedule. Now the first connect attempt will wait a full 10
34585 seconds before switching to a new circuit. Perhaps this will help
34586 a lot. Based on observations from Mike Perry.
34587 - Fix a bug on the Windows implementation of tor_mmap_file() that
34588 would prevent the cached-routers file from ever loading. Reported
34592 - Fix an assert failure when a directory authority sets
34593 AuthDirRejectUnlisted and then receives a descriptor from an
34594 unlisted router. Reported by seeess.
34595 - Avoid a double-free when parsing malformed DirServer lines.
34596 - Fix a bug when a BSD-style PF socket is first used. Patch from
34598 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
34599 to resolve an address at a given exit node even when they ask for
34601 - Servers no longer ever list themselves in their "family" line,
34602 even if configured to do so. This makes it easier to configure
34603 family lists conveniently.
34604 - When running as a server, don't fall back to 127.0.0.1 when no
34605 nameservers are configured in /etc/resolv.conf; instead, make the
34606 user fix resolv.conf or specify nameservers explicitly. (Resolves
34608 - Stop accepting certain malformed ports in configured exit policies.
34609 - Don't re-write the fingerprint file every restart, unless it has
34611 - Stop warning when a single nameserver fails: only warn when _all_ of
34612 our nameservers have failed. Also, when we only have one nameserver,
34613 raise the threshold for deciding that the nameserver is dead.
34614 - Directory authorities now only decide that routers are reachable
34615 if their identity keys are as expected.
34616 - When the user uses bad syntax in the Log config line, stop
34617 suggesting other bad syntax as a replacement.
34618 - Correctly detect ipv6 DNS capability on OpenBSD.
34620 o Minor bugfixes (controller):
34621 - Report the circuit number correctly in STREAM CLOSED events. Bug
34622 reported by Mike Perry.
34623 - Do not report bizarre values for results of accounting GETINFOs
34624 when the last second's write or read exceeds the allotted bandwidth.
34625 - Report "unrecognized key" rather than an empty string when the
34626 controller tries to fetch a networkstatus that doesn't exist.
34629 Changes in version 0.1.1.26 - 2006-12-14
34630 o Security bugfixes:
34631 - Stop sending the HttpProxyAuthenticator string to directory
34632 servers when directory connections are tunnelled through Tor.
34633 - Clients no longer store bandwidth history in the state file.
34634 - Do not log introduction points for hidden services if SafeLogging
34638 - Fix an assert failure when a directory authority sets
34639 AuthDirRejectUnlisted and then receives a descriptor from an
34640 unlisted router (reported by seeess).
34643 Changes in version 0.1.2.4-alpha - 2006-12-03
34645 - Add support for using natd; this allows FreeBSDs earlier than
34646 5.1.2 to have ipfw send connections through Tor without using
34647 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
34650 - Make all connections to addresses of the form ".noconnect"
34651 immediately get closed. This lets application/controller combos
34652 successfully test whether they're talking to the same Tor by
34653 watching for STREAM events.
34654 - Make cross.sh cross-compilation script work even when autogen.sh
34655 hasn't been run. (Patch from Michael Mohr.)
34656 - Statistics dumped by -USR2 now include a breakdown of public key
34657 operations, for profiling.
34660 - Fix a major leak when directory authorities parse their
34661 approved-routers list, a minor memory leak when we fail to pick
34662 an exit node, and a few rare leaks on errors.
34663 - Handle TransPort connections even when the server sends data before
34664 the client sends data. Previously, the connection would just hang
34665 until the client sent data. (Patch from tup based on patch from
34667 - Avoid assert failure when our cached-routers file is empty on
34671 - Don't log spurious warnings when we see a circuit close reason we
34672 don't recognize; it's probably just from a newer version of Tor.
34673 - Have directory authorities allow larger amounts of drift in uptime
34674 without replacing the server descriptor: previously, a server that
34675 restarted every 30 minutes could have 48 "interesting" descriptors
34677 - Start linking to the Tor specification and Tor reference manual
34678 correctly in the Windows installer.
34679 - Add Vidalia to the OS X uninstaller script, so when we uninstall
34680 Tor/Privoxy we also uninstall Vidalia.
34681 - Resume building on Irix64, and fix a lot of warnings from its
34682 MIPSpro C compiler.
34683 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
34684 when we're running as a client.
34687 Changes in version 0.1.1.25 - 2006-11-04
34689 - When a client asks us to resolve (rather than connect to)
34690 an address, and we have a cached answer, give them the cached
34691 answer. Previously, we would give them no answer at all.
34692 - We were building exactly the wrong circuits when we predict
34693 hidden service requirements, meaning Tor would have to build all
34694 its circuits on demand.
34695 - If none of our live entry guards have a high uptime, but we
34696 require a guard with a high uptime, try adding a new guard before
34697 we give up on the requirement. This patch should make long-lived
34698 connections more stable on average.
34699 - When testing reachability of our DirPort, don't launch new
34700 tests when there's already one in progress -- unreachable
34701 servers were stacking up dozens of testing streams.
34703 o Security bugfixes:
34704 - When the user sends a NEWNYM signal, clear the client-side DNS
34705 cache too. Otherwise we continue to act on previous information.
34708 - Avoid a memory corruption bug when creating a hash table for
34710 - Avoid possibility of controller-triggered crash when misusing
34711 certain commands from a v0 controller on platforms that do not
34712 handle printf("%s",NULL) gracefully.
34713 - Avoid infinite loop on unexpected controller input.
34714 - Don't log spurious warnings when we see a circuit close reason we
34715 don't recognize; it's probably just from a newer version of Tor.
34716 - Add Vidalia to the OS X uninstaller script, so when we uninstall
34717 Tor/Privoxy we also uninstall Vidalia.
34720 Changes in version 0.1.2.3-alpha - 2006-10-29
34722 - Prepare for servers to publish descriptors less often: never
34723 discard a descriptor simply for being too old until either it is
34724 recommended by no authorities, or until we get a better one for
34725 the same router. Make caches consider retaining old recommended
34726 routers for even longer.
34727 - If most authorities set a BadExit flag for a server, clients
34728 don't think of it as a general-purpose exit. Clients only consider
34729 authorities that advertise themselves as listing bad exits.
34730 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
34731 headers for content, so that we can work better in the presence of
34732 caching HTTP proxies.
34733 - Allow authorities to list nodes as bad exits by fingerprint or by
34736 o Minor features, controller:
34737 - Add a REASON field to CIRC events; for backward compatibility, this
34738 field is sent only to controllers that have enabled the extended
34739 event format. Also, add additional reason codes to explain why
34740 a given circuit has been destroyed or truncated. (Patches from
34742 - Add a REMOTE_REASON field to extended CIRC events to tell the
34743 controller about why a remote OR told us to close a circuit.
34744 - Stream events also now have REASON and REMOTE_REASON fields,
34745 working much like those for circuit events.
34746 - There's now a GETINFO ns/... field so that controllers can ask Tor
34747 about the current status of a router.
34748 - A new event type "NS" to inform a controller when our opinion of
34749 a router's status has changed.
34750 - Add a GETINFO events/names and GETINFO features/names so controllers
34751 can tell which events and features are supported.
34752 - A new CLEARDNSCACHE signal to allow controllers to clear the
34753 client-side DNS cache without expiring circuits.
34755 o Security bugfixes:
34756 - When the user sends a NEWNYM signal, clear the client-side DNS
34757 cache too. Otherwise we continue to act on previous information.
34760 - Avoid sending junk to controllers or segfaulting when a controller
34761 uses EVENT_NEW_DESC with verbose nicknames.
34762 - Stop triggering asserts if the controller tries to extend hidden
34763 service circuits (reported by mwenge).
34764 - Avoid infinite loop on unexpected controller input.
34765 - When the controller does a "GETINFO network-status", tell it
34766 about even those routers whose descriptors are very old, and use
34767 long nicknames where appropriate.
34768 - Change NT service functions to be loaded on demand. This lets us
34769 build with MinGW without breaking Tor for Windows 98 users.
34770 - Do DirPort reachability tests less often, since a single test
34771 chews through many circuits before giving up.
34772 - In the hidden service example in torrc.sample, stop recommending
34773 esoteric and discouraged hidden service options.
34774 - When stopping an NT service, wait up to 10 sec for it to actually
34775 stop. Patch from Matt Edman; resolves bug 295.
34776 - Fix handling of verbose nicknames with ORCONN controller events:
34777 make them show up exactly when requested, rather than exactly when
34779 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
34780 printing a duplicate "$" in the keys we send (reported by mwenge).
34781 - Correctly set maximum connection limit on Cygwin. (This time
34783 - Try to detect Windows correctly when cross-compiling.
34784 - Detect the size of the routers file correctly even if it is
34785 corrupted (on systems without mmap) or not page-aligned (on systems
34786 with mmap). This bug was harmless.
34787 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
34788 to open a stream fails; now we do in more cases. This should
34789 make clients able to find a good exit faster in some cases, since
34790 unhandleable requests will now get an error rather than timing out.
34791 - Resolve two memory leaks when rebuilding the on-disk router cache
34792 (reported by fookoowa).
34793 - Clean up minor code warnings suggested by the MIPSpro C compiler,
34794 and reported by some Centos users.
34795 - Controller signals now work on non-Unix platforms that don't define
34796 SIGUSR1 and SIGUSR2 the way we expect.
34797 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
34798 values before failing, and always enables eventdns.
34799 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
34800 Try to fix this in configure.in by checking for most functions
34801 before we check for libevent.
34804 Changes in version 0.1.2.2-alpha - 2006-10-07
34806 - Make our async eventdns library on-by-default for Tor servers,
34807 and plan to deprecate the separate dnsworker threads.
34808 - Add server-side support for "reverse" DNS lookups (using PTR
34809 records so clients can determine the canonical hostname for a given
34810 IPv4 address). Only supported by servers using eventdns; servers
34811 now announce in their descriptors whether they support eventdns.
34812 - Specify and implement client-side SOCKS5 interface for reverse DNS
34813 lookups (see doc/socks-extensions.txt).
34814 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
34815 connect to directory servers through Tor. Previously, clients needed
34816 to find Tor exits to make private connections to directory servers.
34817 - Avoid choosing Exit nodes for entry or middle hops when the
34818 total bandwidth available from non-Exit nodes is much higher than
34819 the total bandwidth available from Exit nodes.
34820 - Workaround for name servers (like Earthlink's) that hijack failing
34821 DNS requests and replace the no-such-server answer with a "helpful"
34822 redirect to an advertising-driven search portal. Also work around
34823 DNS hijackers who "helpfully" decline to hijack known-invalid
34824 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
34825 lets you turn it off.
34826 - Send out a burst of long-range padding cells once we've established
34827 that we're reachable. Spread them over 4 circuits, so hopefully
34828 a few will be fast. This exercises our bandwidth and bootstraps
34829 us into the directory more quickly.
34831 o New/improved config options:
34832 - Add new config option "ResolvConf" to let the server operator
34833 choose an alternate resolve.conf file when using eventdns.
34834 - Add an "EnforceDistinctSubnets" option to control our "exclude
34835 servers on the same /16" behavior. It's still on by default; this
34836 is mostly for people who want to operate private test networks with
34837 all the machines on the same subnet.
34838 - If one of our entry guards is on the ExcludeNodes list, or the
34839 directory authorities don't think it's a good guard, treat it as
34840 if it were unlisted: stop using it as a guard, and throw it off
34841 the guards list if it stays that way for a long time.
34842 - Allow directory authorities to be marked separately as authorities
34843 for the v1 directory protocol, the v2 directory protocol, and
34844 as hidden service directories, to make it easier to retire old
34845 authorities. V1 authorities should set "HSAuthoritativeDir 1"
34846 to continue being hidden service authorities too.
34847 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
34849 o Minor features, controller:
34850 - Fix CIRC controller events so that controllers can learn the
34851 identity digests of non-Named servers used in circuit paths.
34852 - Let controllers ask for more useful identifiers for servers. Instead
34853 of learning identity digests for un-Named servers and nicknames
34854 for Named servers, the new identifiers include digest, nickname,
34855 and indication of Named status. Off by default; see control-spec.txt
34856 for more information.
34857 - Add a "getinfo address" controller command so it can display Tor's
34858 best guess to the user.
34859 - New controller event to alert the controller when our server
34860 descriptor has changed.
34861 - Give more meaningful errors on controller authentication failure.
34863 o Minor features, other:
34864 - When asked to resolve a hostname, don't use non-exit servers unless
34865 requested to do so. This allows servers with broken DNS to be
34866 useful to the network.
34867 - Divide eventdns log messages into warn and info messages.
34868 - Reserve the nickname "Unnamed" for routers that can't pick
34869 a hostname: any router can call itself Unnamed; directory
34870 authorities will never allocate Unnamed to any particular router;
34871 clients won't believe that any router is the canonical Unnamed.
34872 - Only include function names in log messages for info/debug messages.
34873 For notice/warn/err, the content of the message should be clear on
34874 its own, and printing the function name only confuses users.
34875 - Avoid some false positives during reachability testing: don't try
34876 to test via a server that's on the same /24 as us.
34877 - If we fail to build a circuit to an intended enclave, and it's
34878 not mandatory that we use that enclave, stop wanting it.
34879 - When eventdns is enabled, allow multithreaded builds on NetBSD and
34880 OpenBSD. (We had previously disabled threads on these platforms
34881 because they didn't have working thread-safe resolver functions.)
34883 o Major bugfixes, anonymity/security:
34884 - If a client asked for a server by name, and there's a named server
34885 in our network-status but we don't have its descriptor yet, we
34886 could return an unnamed server instead.
34887 - Fix NetBSD bug that could allow someone to force uninitialized RAM
34888 to be sent to a server's DNS resolver. This only affects NetBSD
34889 and other platforms that do not bounds-check tolower().
34890 - Reject (most) attempts to use Tor circuits with length one. (If
34891 many people start using Tor as a one-hop proxy, exit nodes become
34892 a more attractive target for compromise.)
34893 - Just because your DirPort is open doesn't mean people should be
34894 able to remotely teach you about hidden service descriptors. Now
34895 only accept rendezvous posts if you've got HSAuthoritativeDir set.
34897 o Major bugfixes, other:
34898 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
34899 - When a client asks the server to resolve (not connect to)
34900 an address, and it has a cached answer, give them the cached answer.
34901 Previously, the server would give them no answer at all.
34902 - Allow really slow clients to not hang up five minutes into their
34903 directory downloads (suggested by Adam J. Richter).
34904 - We were building exactly the wrong circuits when we anticipated
34905 hidden service requirements, meaning Tor would have to build all
34906 its circuits on demand.
34907 - Avoid crashing when we mmap a router cache file of size 0.
34908 - When testing reachability of our DirPort, don't launch new
34909 tests when there's already one in progress -- unreachable
34910 servers were stacking up dozens of testing streams.
34912 o Minor bugfixes, correctness:
34913 - If we're a directory mirror and we ask for "all" network status
34914 documents, we would discard status documents from authorities
34915 we don't recognize.
34916 - Avoid a memory corruption bug when creating a hash table for
34918 - Avoid controller-triggered crash when misusing certain commands
34919 from a v0 controller on platforms that do not handle
34920 printf("%s",NULL) gracefully.
34921 - Don't crash when a controller sends a third argument to an
34922 "extendcircuit" request.
34923 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
34924 response; fix error code when "getinfo dir/status/" fails.
34925 - Avoid crash when telling controller stream-status and a stream
34927 - Patch from Adam Langley to fix assert() in eventdns.c.
34928 - Fix a debug log message in eventdns to say "X resolved to Y"
34929 instead of "X resolved to X".
34930 - Make eventdns give strings for DNS errors, not just error numbers.
34931 - Track unreachable entry guards correctly: don't conflate
34932 'unreachable by us right now' with 'listed as down by the directory
34933 authorities'. With the old code, if a guard was unreachable by
34934 us but listed as running, it would clog our guard list forever.
34935 - Behave correctly in case we ever have a network with more than
34936 2GB/s total advertised capacity.
34937 - Make TrackExitHosts case-insensitive, and fix the behavior of
34938 ".suffix" TrackExitHosts items to avoid matching in the middle of
34940 - Finally fix the openssl warnings from newer gccs that believe that
34941 ignoring a return value is okay, but casting a return value and
34942 then ignoring it is a sign of madness.
34943 - Prevent the contrib/exitlist script from printing the same
34944 result more than once.
34945 - Patch from Steve Hildrey: Generate network status correctly on
34946 non-versioning dirservers.
34947 - Don't listen to the X-Your-Address-Is hint if you did the lookup
34948 via Tor; otherwise you'll think you're the exit node's IP address.
34950 o Minor bugfixes, performance:
34951 - Two small performance improvements on parsing descriptors.
34952 - Major performance improvement on inserting descriptors: change
34953 algorithm from O(n^2) to O(n).
34954 - Make the common memory allocation path faster on machines where
34955 malloc(0) returns a pointer.
34956 - Start remembering X-Your-Address-Is directory hints even if you're
34957 a client, so you can become a server more smoothly.
34958 - Avoid duplicate entries on MyFamily line in server descriptor.
34960 o Packaging, features:
34961 - Remove architecture from OS X builds. The official builds are
34962 now universal binaries.
34963 - The Debian package now uses --verify-config when (re)starting,
34964 to distinguish configuration errors from other errors.
34965 - Update RPMs to require libevent 1.1b.
34967 o Packaging, bugfixes:
34968 - Patches so Tor builds with MinGW on Windows.
34969 - Patches so Tor might run on Cygwin again.
34970 - Resume building on non-gcc compilers and ancient gcc. Resume
34971 building with the -O0 compile flag. Resume building cleanly on
34973 - Run correctly on OS X platforms with case-sensitive filesystems.
34974 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
34975 - Add autoconf checks so Tor can build on Solaris x86 again.
34978 - Documented (and renamed) ServerDNSSearchDomains and
34979 ServerDNSResolvConfFile options.
34980 - Be clearer that the *ListenAddress directives can be repeated
34984 Changes in version 0.1.1.24 - 2006-09-29
34986 - Allow really slow clients to not hang up five minutes into their
34987 directory downloads (suggested by Adam J. Richter).
34988 - Fix major performance regression from 0.1.0.x: instead of checking
34989 whether we have enough directory information every time we want to
34990 do something, only check when the directory information has changed.
34991 This should improve client CPU usage by 25-50%.
34992 - Don't crash if, after a server has been running for a while,
34993 it can't resolve its hostname.
34996 - Allow Tor to start when RunAsDaemon is set but no logs are set.
34997 - Don't crash when the controller receives a third argument to an
34998 "extendcircuit" request.
34999 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
35000 response; fix error code when "getinfo dir/status/" fails.
35001 - Fix configure.in to not produce broken configure files with
35002 more recent versions of autoconf. Thanks to Clint for his auto*
35004 - Fix security bug on NetBSD that could allow someone to force
35005 uninitialized RAM to be sent to a server's DNS resolver. This
35006 only affects NetBSD and other platforms that do not bounds-check
35008 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
35009 methods: these are known to be buggy.
35010 - If we're a directory mirror and we ask for "all" network status
35011 documents, we would discard status documents from authorities
35012 we don't recognize.
35015 Changes in version 0.1.2.1-alpha - 2006-08-27
35017 - Add "eventdns" async dns library from Adam Langley, tweaked to
35018 build on OSX and Windows. Only enabled if you pass the
35019 --enable-eventdns argument to configure.
35020 - Allow servers with no hostname or IP address to learn their
35021 IP address by asking the directory authorities. This code only
35022 kicks in when you would normally have exited with a "no address"
35023 error. Nothing's authenticated, so use with care.
35024 - Rather than waiting a fixed amount of time between retrying
35025 application connections, we wait only 5 seconds for the first,
35026 10 seconds for the second, and 15 seconds for each retry after
35027 that. Hopefully this will improve the expected user experience.
35028 - Patch from Tup to add support for transparent AP connections:
35029 this basically bundles the functionality of trans-proxy-tor
35030 into the Tor mainline. Now hosts with compliant pf/netfilter
35031 implementations can redirect TCP connections straight to Tor
35032 without diverting through SOCKS. Needs docs.
35033 - Busy directory servers save lots of memory by spooling server
35034 descriptors, v1 directories, and v2 networkstatus docs to buffers
35035 as needed rather than en masse. Also mmap the cached-routers
35036 files, so we don't need to keep the whole thing in memory too.
35037 - Automatically avoid picking more than one node from the same
35038 /16 network when constructing a circuit.
35039 - Revise and clean up the torrc.sample that we ship with; add
35040 a section for BandwidthRate and BandwidthBurst.
35043 - Split circuit_t into origin_circuit_t and or_circuit_t, and
35044 split connection_t into edge, or, dir, control, and base structs.
35045 These will save quite a bit of memory on busy servers, and they'll
35046 also help us track down bugs in the code and bugs in the spec.
35047 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
35048 or later. Log when we are doing this, so we can diagnose it when
35049 it fails. (Also, recommend libevent 1.1b for kqueue and
35050 win32 methods; deprecate libevent 1.0b harder; make libevent
35051 recommendation system saner.)
35052 - Start being able to build universal binaries on OS X (thanks
35054 - Export the default exit policy via the control port, so controllers
35055 don't need to guess what it is / will be later.
35056 - Add a man page entry for ProtocolWarnings.
35057 - Add TestVia config option to the man page.
35058 - Remove even more protocol-related warnings from Tor server logs,
35059 such as bad TLS handshakes and malformed begin cells.
35060 - Stop fetching descriptors if you're not a dir mirror and you
35061 haven't tried to establish any circuits lately. [This currently
35062 causes some dangerous behavior, because when you start up again
35063 you'll use your ancient server descriptors.]
35064 - New DirPort behavior: if you have your dirport set, you download
35065 descriptors aggressively like a directory mirror, whether or not
35066 your ORPort is set.
35067 - Get rid of the router_retry_connections notion. Now routers
35068 no longer try to rebuild long-term connections to directory
35069 authorities, and directory authorities no longer try to rebuild
35070 long-term connections to all servers. We still don't hang up
35071 connections in these two cases though -- we need to look at it
35072 more carefully to avoid flapping, and we likely need to wait til
35073 0.1.1.x is obsolete.
35074 - Drop compatibility with obsolete Tors that permit create cells
35075 to have the wrong circ_id_type.
35076 - Re-enable per-connection rate limiting. Get rid of the "OP
35077 bandwidth" concept. Lay groundwork for "bandwidth classes" --
35078 separate global buckets that apply depending on what sort of conn
35080 - Start publishing one minute or so after we find our ORPort
35081 to be reachable. This will help reduce the number of descriptors
35082 we have for ourselves floating around, since it's quite likely
35083 other things (e.g. DirPort) will change during that minute too.
35084 - Fork the v1 directory protocol into its own spec document,
35085 and mark dir-spec.txt as the currently correct (v2) spec.
35088 - When we find our DirPort to be reachable, publish a new descriptor
35089 so we'll tell the world (reported by pnx).
35090 - Publish a new descriptor after we hup/reload. This is important
35091 if our config has changed such that we'll want to start advertising
35092 our DirPort now, etc.
35093 - Allow Tor to start when RunAsDaemon is set but no logs are set.
35094 - When we have a state file we cannot parse, tell the user and
35095 move it aside. Now we avoid situations where the user starts
35096 Tor in 1904, Tor writes a state file with that timestamp in it,
35097 the user fixes her clock, and Tor refuses to start.
35098 - Fix configure.in to not produce broken configure files with
35099 more recent versions of autoconf. Thanks to Clint for his auto*
35101 - "tor --verify-config" now exits with -1(255) or 0 depending on
35102 whether the config options are bad or good.
35103 - Resolve bug 321 when using dnsworkers: append a period to every
35104 address we resolve at the exit node, so that we do not accidentally
35105 pick up local addresses, and so that failing searches are retried
35106 in the resolver search domains. (This is already solved for
35107 eventdns.) (This breaks Blossom servers for now.)
35108 - If we are using an exit enclave and we can't connect, e.g. because
35109 its webserver is misconfigured to not listen on localhost, then
35110 back off and try connecting from somewhere else before we fail.
35113 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
35114 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
35115 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
35116 when the IP address is mapped through MapAddress to a hostname.
35117 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
35118 useless IPv6 DNS resolves.
35119 - Patch suggested by Karsten Loesing: respond to SIGNAL command
35120 before we execute the signal, in case the signal shuts us down.
35121 - Clean up AllowInvalidNodes man page entry.
35122 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
35123 - Add more asserts to track down an assert error on a windows Tor
35124 server with connection_add being called with socket == -1.
35125 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
35126 - Fix misleading log messages: an entry guard that is "unlisted",
35127 as well as not known to be "down" (because we've never heard
35128 of it), is not therefore "up".
35129 - Remove code to special-case "-cvs" ending, since it has not
35130 actually mattered since 0.0.9.
35131 - Make our socks5 handling more robust to broken socks clients:
35132 throw out everything waiting on the buffer in between socks
35133 handshake phases, since they can't possibly (so the theory
35134 goes) have predicted what we plan to respond to them.
35137 Changes in version 0.1.1.23 - 2006-07-30
35139 - Fast Tor servers, especially exit nodes, were triggering asserts
35140 due to a bug in handling the list of pending DNS resolves. Some
35141 bugs still remain here; we're hunting them.
35142 - Entry guards could crash clients by sending unexpected input.
35143 - More fixes on reachability testing: if you find yourself reachable,
35144 then don't ever make any client requests (so you stop predicting
35145 circuits), then hup or have your clock jump, then later your IP
35146 changes, you won't think circuits are working, so you won't try to
35147 test reachability, so you won't publish.
35150 - Avoid a crash if the controller does a resetconf firewallports
35151 and then a setconf fascistfirewall=1.
35152 - Avoid an integer underflow when the dir authority decides whether
35153 a router is stable: we might wrongly label it stable, and compute
35154 a slightly wrong median stability, when a descriptor is published
35156 - Fix a place where we might trigger an assert if we can't build our
35157 own server descriptor yet.
35160 Changes in version 0.1.1.22 - 2006-07-05
35162 - Fix a big bug that was causing servers to not find themselves
35163 reachable if they changed IP addresses. Since only 0.1.1.22+
35164 servers can do reachability testing correctly, now we automatically
35165 make sure to test via one of these.
35166 - Fix to allow clients and mirrors to learn directory info from
35167 descriptor downloads that get cut off partway through.
35168 - Directory authorities had a bug in deciding if a newly published
35169 descriptor was novel enough to make everybody want a copy -- a few
35170 servers seem to be publishing new descriptors many times a minute.
35172 - Fix a rare bug that was causing some servers to complain about
35173 "closing wedged cpuworkers" and skip some circuit create requests.
35174 - Make the Exit flag in directory status documents actually work.
35177 Changes in version 0.1.1.21 - 2006-06-10
35178 o Crash and assert fixes from 0.1.1.20:
35179 - Fix a rare crash on Tor servers that have enabled hibernation.
35180 - Fix a seg fault on startup for Tor networks that use only one
35181 directory authority.
35182 - Fix an assert from a race condition that occurs on Tor servers
35183 while exiting, where various threads are trying to log that they're
35184 exiting, and delete the logs, at the same time.
35185 - Make our unit tests pass again on certain obscure platforms.
35188 - Add support for building SUSE RPM packages.
35189 - Speed up initial bootstrapping for clients: if we are making our
35190 first ever connection to any entry guard, then don't mark it down
35192 - When only one Tor server in the network is labelled as a guard,
35193 and we've already picked him, we would cycle endlessly picking him
35194 again, being unhappy about it, etc. Now we specifically exclude
35195 current guards when picking a new guard.
35196 - Servers send create cells more reliably after the TLS connection
35197 is established: we were sometimes forgetting to send half of them
35198 when we had more than one pending.
35199 - If we get a create cell that asks us to extend somewhere, but the
35200 Tor server there doesn't match the expected digest, we now send
35201 a destroy cell back, rather than silently doing nothing.
35202 - Make options->RedirectExit work again.
35203 - Make cookie authentication for the controller work again.
35204 - Stop being picky about unusual characters in the arguments to
35205 mapaddress. It's none of our business.
35206 - Add a new config option "TestVia" that lets you specify preferred
35207 middle hops to use for test circuits. Perhaps this will let me
35208 debug the reachability problems better.
35210 o Log / documentation fixes:
35211 - If we're a server and some peer has a broken TLS certificate, don't
35212 log about it unless ProtocolWarnings is set, i.e., we want to hear
35213 about protocol violations by others.
35214 - Fix spelling of VirtualAddrNetwork in man page.
35215 - Add a better explanation at the top of the autogenerated torrc file
35216 about what happened to our old torrc.
35219 Changes in version 0.1.1.20 - 2006-05-23
35221 - Downgrade a log severity where servers complain that they're
35223 - Avoid a compile warning on FreeBSD.
35224 - Remove string size limit on NEWDESC messages; solve bug 291.
35225 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
35226 more thoroughly when we're running on windows.
35229 Changes in version 0.1.1.19-rc - 2006-05-03
35231 - Regenerate our local descriptor if it's dirty and we try to use
35232 it locally (e.g. if it changes during reachability detection).
35233 - If we setconf our ORPort to 0, we continued to listen on the
35234 old ORPort and receive connections.
35235 - Avoid a second warning about machine/limits.h on Debian
35237 - Be willing to add our own routerinfo into the routerlist.
35238 Now authorities will include themselves in their directories
35239 and network-statuses.
35240 - Stop trying to upload rendezvous descriptors to every
35241 directory authority: only try the v1 authorities.
35242 - Servers no longer complain when they think they're not
35243 registered with the directory authorities. There were too many
35245 - Backport dist-rpm changes so rpms can be built without errors.
35248 - Implement an option, VirtualAddrMask, to set which addresses
35249 get handed out in response to mapaddress requests. This works
35250 around a bug in tsocks where 127.0.0.0/8 is never socksified.
35253 Changes in version 0.1.1.18-rc - 2006-04-10
35255 - Work harder to download live network-statuses from all the
35256 directory authorities we know about. Improve the threshold
35257 decision logic so we're more robust to edge cases.
35258 - When fetching rendezvous descriptors, we were willing to ask
35259 v2 authorities too, which would always return 404.
35262 - Stop listing down or invalid nodes in the v1 directory. This will
35263 reduce its bulk by about 1/3, and reduce load on directory
35265 - When deciding whether a router is Fast or Guard-worthy, consider
35266 his advertised BandwidthRate and not just the BandwidthCapacity.
35267 - No longer ship INSTALL and README files -- they are useless now.
35268 - Force rpmbuild to behave and honor target_cpu.
35269 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
35270 - Start to include translated versions of the tor-doc-*.html
35271 files, along with the screenshots. Still needs more work.
35272 - Start sending back 512 and 451 errors if mapaddress fails,
35273 rather than not sending anything back at all.
35274 - When we fail to bind or listen on an incoming or outgoing
35275 socket, we should close it before failing. otherwise we just
35276 leak it. (thanks to weasel for finding.)
35277 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
35278 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
35279 - Make NoPublish (even though deprecated) work again.
35280 - Fix a minor security flaw where a versioning auth dirserver
35281 could list a recommended version many times in a row to make
35282 clients more convinced that it's recommended.
35283 - Fix crash bug if there are two unregistered servers running
35284 with the same nickname, one of them is down, and you ask for
35285 them by nickname in your EntryNodes or ExitNodes. Also, try
35286 to pick the one that's running rather than an arbitrary one.
35287 - Fix an infinite loop we could hit if we go offline for too long.
35288 - Complain when we hit WSAENOBUFS on recv() or write() too.
35289 Perhaps this will help us hunt the bug.
35290 - If you're not a versioning dirserver, don't put the string
35291 "client-versions \nserver-versions \n" in your network-status.
35292 - Lower the minimum required number of file descriptors to 1000,
35293 so we can have some overhead for Valgrind on Linux, where the
35294 default ulimit -n is 1024.
35297 - Add tor.dizum.com as the fifth authoritative directory server.
35298 - Add a new config option FetchUselessDescriptors, off by default,
35299 for when you plan to run "exitlist" on your client and you want
35300 to know about even the non-running descriptors.
35303 Changes in version 0.1.1.17-rc - 2006-03-28
35305 - Clients and servers since 0.1.1.10-alpha have been expiring
35306 connections whenever they are idle for 5 minutes and they *do*
35307 have circuits on them. Oops. With this new version, clients will
35308 discard their previous entry guard choices and avoid choosing
35309 entry guards running these flawed versions.
35310 - Fix memory leak when uncompressing concatenated zlib streams. This
35311 was causing substantial leaks over time on Tor servers.
35312 - The v1 directory was including servers as much as 48 hours old,
35313 because that's how the new routerlist->routers works. Now only
35314 include them if they're 20 hours old or less.
35317 - Resume building on irix64, netbsd 2.0, etc.
35318 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
35320 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
35321 and it is confusing some users.
35322 - Mirrors stop caching the v1 directory so often.
35323 - Make the max number of old descriptors that a cache will hold
35324 rise with the number of directory authorities, so we can scale.
35325 - Change our win32 uname() hack to be more forgiving about what
35326 win32 versions it thinks it's found.
35329 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
35331 - When the controller's *setconf commands fail, collect an error
35332 message in a string and hand it back to the controller.
35333 - Make the v2 dir's "Fast" flag based on relative capacity, just
35334 like "Stable" is based on median uptime. Name everything in the
35335 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
35336 - Log server fingerprint on startup, so new server operators don't
35337 have to go hunting around their filesystem for it.
35338 - Return a robots.txt on our dirport to discourage google indexing.
35339 - Let the controller ask for GETINFO dir/status/foo so it can ask
35340 directly rather than connecting to the dir port. Only works when
35341 dirport is set for now.
35343 o New config options rather than constants in the code:
35344 - SocksTimeout: How long do we let a socks connection wait
35345 unattached before we fail it?
35346 - CircuitBuildTimeout: Cull non-open circuits that were born
35347 at least this many seconds ago.
35348 - CircuitIdleTimeout: Cull open clean circuits that were born
35349 at least this many seconds ago.
35352 Changes in version 0.1.1.16-rc - 2006-03-18
35353 o Bugfixes on 0.1.1.15-rc:
35354 - Fix assert when the controller asks to attachstream a connect-wait
35355 or resolve-wait stream.
35356 - Now do address rewriting when the controller asks us to attach
35357 to a particular circuit too. This will let Blossom specify
35358 "moria2.exit" without having to learn what moria2's IP address is.
35359 - Make the "tor --verify-config" command-line work again, so people
35360 can automatically check if their torrc will parse.
35361 - Authoritative dirservers no longer require an open connection from
35362 a server to consider him "reachable". We need this change because
35363 when we add new auth dirservers, old servers won't know not to
35365 - Let Tor build on Sun CC again.
35366 - Fix an off-by-one buffer size in dirserv.c that magically never
35367 hit our three authorities but broke sjmurdoch's own tor network.
35368 - If we as a directory mirror don't know of any v1 directory
35369 authorities, then don't try to cache any v1 directories.
35370 - Stop warning about unknown servers in our family when they are
35371 given as hex digests.
35372 - Stop complaining as quickly to the server operator that he
35373 hasn't registered his nickname/key binding.
35374 - Various cleanups so we can add new V2 Auth Dirservers.
35375 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
35376 reflect the updated flags in our v2 dir protocol.
35377 - Resume allowing non-printable characters for exit streams (both
35378 for connecting and for resolving). Now we tolerate applications
35379 that don't follow the RFCs. But continue to block malformed names
35382 o Bugfixes on 0.1.0.x:
35383 - Fix assert bug in close_logs(): when we close and delete logs,
35384 remove them all from the global "logfiles" list.
35385 - Fix minor integer overflow in calculating when we expect to use up
35386 our bandwidth allocation before hibernating.
35387 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
35388 there are multiple SSLs installed with different versions.
35389 - When we try to be a server and Address is not explicitly set and
35390 our hostname resolves to a private IP address, try to use an
35391 interface address if it has a public address. Now Windows machines
35392 that think of themselves as localhost can work by default.
35395 - Let the controller ask for GETINFO dir/server/foo so it can ask
35396 directly rather than connecting to the dir port.
35397 - Let the controller tell us about certain router descriptors
35398 that it doesn't want Tor to use in circuits. Implement
35399 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
35400 - New config option SafeSocks to reject all application connections
35401 using unsafe socks protocols. Defaults to off.
35404 Changes in version 0.1.1.15-rc - 2006-03-11
35405 o Bugfixes and cleanups:
35406 - When we're printing strings from the network, don't try to print
35407 non-printable characters. This protects us against shell escape
35408 sequence exploits, and also against attacks to fool humans into
35409 misreading their logs.
35410 - Fix a bug where Tor would fail to establish any connections if you
35411 left it off for 24 hours and then started it: we were happy with
35412 the obsolete network statuses, but they all referred to router
35413 descriptors that were too old to fetch, so we ended up with no
35414 valid router descriptors.
35415 - Fix a seg fault in the controller's "getinfo orconn-status"
35416 command while listing status on incoming handshaking connections.
35417 Introduce a status name "NEW" for these connections.
35418 - If we get a linelist or linelist_s config option from the torrc
35419 (e.g. ExitPolicy) and it has no value, warn and skip rather than
35420 silently resetting it to its default.
35421 - Don't abandon entry guards until they've been down or gone for
35423 - Cleaner and quieter log messages.
35426 - New controller signal NEWNYM that makes new application requests
35427 use clean circuits.
35428 - Add a new circuit purpose 'controller' to let the controller ask
35429 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
35430 controller command to let you specify the purpose if you're
35431 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
35432 command to let you change a circuit's purpose after it's been
35434 - Accept "private:*" in routerdesc exit policies; not generated yet
35435 because older Tors do not understand it.
35436 - Add BSD-style contributed startup script "rc.subr" from Peter
35440 Changes in version 0.1.1.14-alpha - 2006-02-20
35441 o Bugfixes on 0.1.1.x:
35442 - Don't die if we ask for a stdout or stderr log (even implicitly)
35443 and we're set to RunAsDaemon -- just warn.
35444 - We still had a few bugs in the OR connection rotation code that
35445 caused directory servers to slowly aggregate connections to other
35446 fast Tor servers. This time for sure!
35447 - Make log entries on Win32 include the name of the function again.
35448 - We were treating a pair of exit policies if they were equal even
35449 if one said accept and the other said reject -- causing us to
35450 not always publish a new descriptor since we thought nothing
35452 - Retry pending server downloads as well as pending networkstatus
35453 downloads when we unexpectedly get a socks request.
35454 - We were ignoring the IS_FAST flag in the directory status,
35455 meaning we were willing to pick trivial-bandwidth nodes for "fast"
35457 - If the controller's SAVECONF command fails (e.g. due to file
35458 permissions), let the controller know that it failed.
35461 - If we're trying to be a Tor server and running Windows 95/98/ME
35462 as a server, explain that we'll likely crash.
35463 - When we're a server, a client asks for an old-style directory,
35464 and our write bucket is empty, don't give it to him. This way
35465 small servers can continue to serve the directory *sometimes*,
35466 without getting overloaded.
35467 - Compress exit policies even more -- look for duplicate lines
35469 - Clients now honor the "guard" flag in the router status when
35470 picking entry guards, rather than looking at is_fast or is_stable.
35471 - Retain unrecognized lines in $DATADIR/state file, so that we can
35472 be forward-compatible.
35473 - Generate 18.0.0.0/8 address policy format in descs when we can;
35474 warn when the mask is not reducible to a bit-prefix.
35475 - Let the user set ControlListenAddress in the torrc. This can be
35476 dangerous, but there are some cases (like a secured LAN) where it
35478 - Split ReachableAddresses into ReachableDirAddresses and
35479 ReachableORAddresses, so we can restrict Dir conns to port 80
35480 and OR conns to port 443.
35481 - Now we can target arch and OS in rpm builds (contributed by
35482 Phobos). Also make the resulting dist-rpm filename match the
35484 - New config options to help controllers: FetchServerDescriptors
35485 and FetchHidServDescriptors for whether to fetch server
35486 info and hidserv info or let the controller do it, and
35487 PublishServerDescriptor and PublishHidServDescriptors.
35488 - Also let the controller set the __AllDirActionsPrivate config
35489 option if you want all directory fetches/publishes to happen via
35490 Tor (it assumes your controller bootstraps your circuits).
35493 Changes in version 0.1.0.17 - 2006-02-17
35494 o Crash bugfixes on 0.1.0.x:
35495 - When servers with a non-zero DirPort came out of hibernation,
35496 sometimes they would trigger an assert.
35498 o Other important bugfixes:
35499 - On platforms that don't have getrlimit (like Windows), we were
35500 artificially constraining ourselves to a max of 1024
35501 connections. Now just assume that we can handle as many as 15000
35502 connections. Hopefully this won't cause other problems.
35504 o Backported features:
35505 - When we're a server, a client asks for an old-style directory,
35506 and our write bucket is empty, don't give it to him. This way
35507 small servers can continue to serve the directory *sometimes*,
35508 without getting overloaded.
35509 - Whenever you get a 503 in response to a directory fetch, try
35510 once more. This will become important once servers start sending
35511 503's whenever they feel busy.
35512 - Fetch a new directory every 120 minutes, not every 40 minutes.
35513 Now that we have hundreds of thousands of users running the old
35514 directory algorithm, it's starting to hurt a lot.
35515 - Bump up the period for forcing a hidden service descriptor upload
35516 from 20 minutes to 1 hour.
35519 Changes in version 0.1.1.13-alpha - 2006-02-09
35520 o Crashes in 0.1.1.x:
35521 - When you tried to setconf ORPort via the controller, Tor would
35522 crash. So people using TorCP to become a server were sad.
35523 - Solve (I hope) the stack-smashing bug that we were seeing on fast
35524 servers. The problem appears to be something do with OpenSSL's
35525 random number generation, or how we call it, or something. Let me
35526 know if the crashes continue.
35527 - Turn crypto hardware acceleration off by default, until we find
35528 somebody smart who can test it for us. (It appears to produce
35529 seg faults in at least some cases.)
35530 - Fix a rare assert error when we've tried all intro points for
35531 a hidden service and we try fetching the service descriptor again:
35532 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
35535 - Fix a major load balance bug: we were round-robining in 16 KB
35536 chunks, and servers with bandwidthrate of 20 KB, while downloading
35537 a 600 KB directory, would starve their other connections. Now we
35538 try to be a bit more fair.
35539 - Dir authorities and mirrors were never expiring the newest
35540 descriptor for each server, causing memory and directory bloat.
35541 - Fix memory-bloating and connection-bloating bug on servers: We
35542 were never closing any connection that had ever had a circuit on
35543 it, because we were checking conn->n_circuits == 0, yet we had a
35544 bug that let it go negative.
35545 - Make Tor work using squid as your http proxy again -- squid
35546 returns an error if you ask for a URL that's too long, and it uses
35547 a really generic error message. Plus, many people are behind a
35548 transparent squid so they don't even realize it.
35549 - On platforms that don't have getrlimit (like Windows), we were
35550 artificially constraining ourselves to a max of 1024
35551 connections. Now just assume that we can handle as many as 15000
35552 connections. Hopefully this won't cause other problems.
35553 - Add a new config option ExitPolicyRejectPrivate which defaults to
35554 1. This means all exit policies will begin with rejecting private
35555 addresses, unless the server operator explicitly turns it off.
35558 - Clients no longer download descriptors for non-running
35560 - Before we add new directory authorities, we should make it
35561 clear that only v1 authorities should receive/publish hidden
35562 service descriptors.
35565 - As soon as we've fetched some more directory info, immediately
35566 try to download more server descriptors. This way we don't have
35567 a 10 second pause during initial bootstrapping.
35568 - Remove even more loud log messages that the server operator can't
35570 - When we're running an obsolete or un-recommended version, make
35571 the log message more clear about what the problem is and what
35572 versions *are* still recommended.
35573 - Provide a more useful warn message when our onion queue gets full:
35574 the CPU is too slow or the exit policy is too liberal.
35575 - Don't warn when we receive a 503 from a dirserver/cache -- this
35576 will pave the way for them being able to refuse if they're busy.
35577 - When we fail to bind a listener, try to provide a more useful
35578 log message: e.g., "Is Tor already running?"
35579 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
35580 Goldberg can prove things about our handshake protocol more
35582 - MaxConn has been obsolete for a while now. Document the ConnLimit
35583 config option, which is a *minimum* number of file descriptors
35584 that must be available else Tor refuses to start.
35585 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
35586 if you log to syslog and want something other than LOG_DAEMON.
35587 - Make dirservers generate a separate "guard" flag to mean,
35588 "would make a good entry guard". Make clients parse it and vote
35589 on it. Not used by clients yet.
35590 - Implement --with-libevent-dir option to ./configure. Also, improve
35591 search techniques to find libevent, and use those for openssl too.
35592 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
35593 - Only start testing reachability once we've established a
35594 circuit. This will make startup on dirservers less noisy.
35595 - Don't try to upload hidden service descriptors until we have
35596 established a circuit.
35597 - Fix the controller's "attachstream 0" command to treat conn like
35598 it just connected, doing address remapping, handling .exit and
35599 .onion idioms, and so on. Now we're more uniform in making sure
35600 that the controller hears about new and closing connections.
35603 Changes in version 0.1.1.12-alpha - 2006-01-11
35604 o Bugfixes on 0.1.1.x:
35605 - The fix to close duplicate server connections was closing all
35606 Tor client connections if they didn't establish a circuit
35607 quickly enough. Oops.
35608 - Fix minor memory issue (double-free) that happened on exit.
35610 o Bugfixes on 0.1.0.x:
35611 - Tor didn't warn when it failed to open a log file.
35614 Changes in version 0.1.1.11-alpha - 2006-01-10
35615 o Crashes in 0.1.1.x:
35616 - Include all the assert/crash fixes from 0.1.0.16.
35617 - If you start Tor and then quit very quickly, there were some
35618 races that tried to free things that weren't allocated yet.
35619 - Fix a rare memory stomp if you're running hidden services.
35620 - Fix segfault when specifying DirServer in config without nickname.
35621 - Fix a seg fault when you finish connecting to a server but at
35622 that moment you dump his server descriptor.
35623 - Extendcircuit and Attachstream controller commands would
35624 assert/crash if you don't give them enough arguments.
35625 - Fix an assert error when we're out of space in the connection_list
35626 and we try to post a hidden service descriptor (reported by weasel).
35627 - If you specify a relative torrc path and you set RunAsDaemon in
35628 your torrc, then it chdir()'s to the new directory. If you HUP,
35629 it tries to load the new torrc location, fails, and exits.
35630 The fix: no longer allow a relative path to torrc using -f.
35633 - Implement "entry guards": automatically choose a handful of entry
35634 nodes and stick with them for all circuits. Only pick new guards
35635 when the ones you have are unsuitable, and if the old guards
35636 become suitable again, switch back. This will increase security
35637 dramatically against certain end-point attacks. The EntryNodes
35638 config option now provides some hints about which entry guards you
35639 want to use most; and StrictEntryNodes means to only use those.
35640 - New directory logic: download by descriptor digest, not by
35641 fingerprint. Caches try to download all listed digests from
35642 authorities; clients try to download "best" digests from caches.
35643 This avoids partitioning and isolating attacks better.
35644 - Make the "stable" router flag in network-status be the median of
35645 the uptimes of running valid servers, and make clients pay
35646 attention to the network-status flags. Thus the cutoff adapts
35647 to the stability of the network as a whole, making IRC, IM, etc
35648 connections more reliable.
35651 - Tor servers with dynamic IP addresses were needing to wait 18
35652 hours before they could start doing reachability testing using
35653 the new IP address and ports. This is because they were using
35654 the internal descriptor to learn what to test, yet they were only
35655 rebuilding the descriptor once they decided they were reachable.
35656 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
35657 to download certain server descriptors, throw them away, and then
35658 fetch them again after 30 minutes. Now mirrors throw away these
35659 server descriptors so clients can't get them.
35660 - We were leaving duplicate connections to other ORs open for a week,
35661 rather than closing them once we detect a duplicate. This only
35662 really affected authdirservers, but it affected them a lot.
35663 - Spread the authdirservers' reachability testing over the entire
35664 testing interval, so we don't try to do 500 TLS's at once every
35668 - If the network is down, and we try to connect to a conn because
35669 we have a circuit in mind, and we timeout (30 seconds) because the
35670 network never answers, we were expiring the circuit, but we weren't
35671 obsoleting the connection or telling the entry_guards functions.
35672 - Some Tor servers process billions of cells per day. These statistics
35673 need to be uint64_t's.
35674 - Check for integer overflows in more places, when adding elements
35675 to smartlists. This could possibly prevent a buffer overflow
35676 on malicious huge inputs. I don't see any, but I haven't looked
35678 - ReachableAddresses kept growing new "reject *:*" lines on every
35680 - When you "setconf log" via the controller, it should remove all
35681 logs. We were automatically adding back in a "log notice stdout".
35682 - Newly bootstrapped Tor networks couldn't establish hidden service
35683 circuits until they had nodes with high uptime. Be more tolerant.
35684 - We were marking servers down when they could not answer every piece
35685 of the directory request we sent them. This was far too harsh.
35686 - Fix the torify (tsocks) config file to not use Tor for localhost
35688 - Directory authorities now go to the proper authority when asking for
35689 a networkstatus, even when they want a compressed one.
35690 - Fix a harmless bug that was causing Tor servers to log
35691 "Got an end because of misc error, but we're not an AP. Closing."
35692 - Authorities were treating their own descriptor changes as cosmetic,
35693 meaning the descriptor available in the network-status and the
35694 descriptor that clients downloaded were different.
35695 - The OS X installer was adding a symlink for tor_resolve but
35696 the binary was called tor-resolve (reported by Thomas Hardly).
35697 - Workaround a problem with some http proxies where they refuse GET
35698 requests that specify "Content-Length: 0" (reported by Adrian).
35699 - Fix wrong log message when you add a "HiddenServiceNodes" config
35700 line without any HiddenServiceDir line (reported by Chris Thomas).
35703 - Write the TorVersion into the state file so we have a prayer of
35704 keeping forward and backward compatibility.
35705 - Revive the FascistFirewall config option rather than eliminating it:
35706 now it's a synonym for ReachableAddresses *:80,*:443.
35707 - Clients choose directory servers from the network status lists,
35708 not from their internal list of router descriptors. Now they can
35709 go to caches directly rather than needing to go to authorities
35711 - Directory authorities ignore router descriptors that have only
35712 cosmetic differences: do this for 0.1.0.x servers now too.
35713 - Add a new flag to network-status indicating whether the server
35714 can answer v2 directory requests too.
35715 - Authdirs now stop whining so loudly about bad descriptors that
35716 they fetch from other dirservers. So when there's a log complaint,
35717 it's for sure from a freshly uploaded descriptor.
35718 - Reduce memory requirements in our structs by changing the order
35720 - There used to be two ways to specify your listening ports in a
35721 server descriptor: on the "router" line and with a separate "ports"
35722 line. Remove support for the "ports" line.
35723 - New config option "AuthDirRejectUnlisted" for auth dirservers as
35724 a panic button: if we get flooded with unusable servers we can
35725 revert to only listing servers in the approved-routers file.
35726 - Auth dir servers can now mark a fingerprint as "!reject" or
35727 "!invalid" in the approved-routers file (as its nickname), to
35728 refuse descriptors outright or include them but marked as invalid.
35729 - Servers store bandwidth history across restarts/crashes.
35730 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
35731 get a better idea of why their circuits failed. Not used yet.
35732 - Directory mirrors now cache up to 16 unrecognized network-status
35733 docs. Now we can add new authdirservers and they'll be cached too.
35734 - When picking a random directory, prefer non-authorities if any
35736 - New controller option "getinfo desc/all-recent" to fetch the
35737 latest server descriptor for every router that Tor knows about.
35740 Changes in version 0.1.0.16 - 2006-01-02
35741 o Crash bugfixes on 0.1.0.x:
35742 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
35743 corrupting the heap, losing FDs, or crashing when we need to resize
35744 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
35745 - It turns out sparc64 platforms crash on unaligned memory access
35746 too -- so detect and avoid this.
35747 - Handle truncated compressed data correctly (by detecting it and
35749 - Fix possible-but-unlikely free(NULL) in control.c.
35750 - When we were closing connections, there was a rare case that
35751 stomped on memory, triggering seg faults and asserts.
35752 - Avoid potential infinite recursion when building a descriptor. (We
35753 don't know that it ever happened, but better to fix it anyway.)
35754 - We were neglecting to unlink marked circuits from soon-to-close OR
35755 connections, which caused some rare scribbling on freed memory.
35756 - Fix a memory stomping race bug when closing the joining point of two
35757 rendezvous circuits.
35758 - Fix an assert in time parsing found by Steven Murdoch.
35760 o Other bugfixes on 0.1.0.x:
35761 - When we're doing reachability testing, provide more useful log
35762 messages so the operator knows what to expect.
35763 - Do not check whether DirPort is reachable when we are suppressing
35764 advertising it because of hibernation.
35765 - When building with -static or on Solaris, we sometimes needed -ldl.
35766 - When we're deciding whether a stream has enough circuits around
35767 that can handle it, count the freshly dirty ones and not the ones
35768 that are so dirty they won't be able to handle it.
35769 - When we're expiring old circuits, we had a logic error that caused
35770 us to close new rendezvous circuits rather than old ones.
35771 - Give a more helpful log message when you try to change ORPort via
35772 the controller: you should upgrade Tor if you want that to work.
35773 - We were failing to parse Tor versions that start with "Tor ".
35774 - Tolerate faulty streams better: when a stream fails for reason
35775 exitpolicy, stop assuming that the router is lying about his exit
35776 policy. When a stream fails for reason misc, allow it to retry just
35777 as if it was resolvefailed. When a stream has failed three times,
35778 reset its failure count so we can try again and get all three tries.
35781 Changes in version 0.1.1.10-alpha - 2005-12-11
35782 o Correctness bugfixes on 0.1.0.x:
35783 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
35784 corrupting the heap, losing FDs, or crashing when we need to resize
35785 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
35786 - Stop doing the complex voodoo overkill checking for insecure
35787 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
35788 - When we were closing connections, there was a rare case that
35789 stomped on memory, triggering seg faults and asserts.
35790 - We were neglecting to unlink marked circuits from soon-to-close OR
35791 connections, which caused some rare scribbling on freed memory.
35792 - When we're deciding whether a stream has enough circuits around
35793 that can handle it, count the freshly dirty ones and not the ones
35794 that are so dirty they won't be able to handle it.
35795 - Recover better from TCP connections to Tor servers that are
35796 broken but don't tell you (it happens!); and rotate TLS
35797 connections once a week.
35798 - When we're expiring old circuits, we had a logic error that caused
35799 us to close new rendezvous circuits rather than old ones.
35800 - Fix a scary-looking but apparently harmless bug where circuits
35801 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
35802 servers, and never switch to state CIRCUIT_STATE_OPEN.
35803 - When building with -static or on Solaris, we sometimes needed to
35805 - Give a useful message when people run Tor as the wrong user,
35806 rather than telling them to start chowning random directories.
35807 - We were failing to inform the controller about new .onion streams.
35809 o Security bugfixes on 0.1.0.x:
35810 - Refuse server descriptors if the fingerprint line doesn't match
35811 the included identity key. Tor doesn't care, but other apps (and
35812 humans) might actually be trusting the fingerprint line.
35813 - We used to kill the circuit when we receive a relay command we
35814 don't recognize. Now we just drop it.
35815 - Start obeying our firewall options more rigorously:
35816 . If we can't get to a dirserver directly, try going via Tor.
35817 . Don't ever try to connect (as a client) to a place our
35818 firewall options forbid.
35819 . If we specify a proxy and also firewall options, obey the
35820 firewall options even when we're using the proxy: some proxies
35821 can only proxy to certain destinations.
35822 - Fix a bug found by Lasse Overlier: when we were making internal
35823 circuits (intended to be cannibalized later for rendezvous and
35824 introduction circuits), we were picking them so that they had
35825 useful exit nodes. There was no need for this, and it actually
35826 aids some statistical attacks.
35827 - Start treating internal circuits and exit circuits separately.
35828 It's important to keep them separate because internal circuits
35829 have their last hops picked like middle hops, rather than like
35830 exit hops. So exiting on them will break the user's expectations.
35832 o Bugfixes on 0.1.1.x:
35833 - Take out the mis-feature where we tried to detect IP address
35834 flapping for people with DynDNS, and chose not to upload a new
35835 server descriptor sometimes.
35836 - Try to be compatible with OpenSSL 0.9.6 again.
35837 - Log fix: when the controller is logging about .onion addresses,
35838 sometimes it didn't include the ".onion" part of the address.
35839 - Don't try to modify options->DirServers internally -- if the
35840 user didn't specify any, just add the default ones directly to
35841 the trusted dirserver list. This fixes a bug where people running
35842 controllers would use SETCONF on some totally unrelated config
35843 option, and Tor would start yelling at them about changing their
35845 - Let the controller's redirectstream command specify a port, in
35846 case the controller wants to change that too.
35847 - When we requested a pile of server descriptors, we sometimes
35848 accidentally launched a duplicate request for the first one.
35849 - Bugfix for trackhostexits: write down the fingerprint of the
35850 chosen exit, not its nickname, because the chosen exit might not
35852 - When parsing foo.exit, if foo is unknown, and we are leaving
35853 circuits unattached, set the chosen_exit field and leave the
35854 address empty. This matters because controllers got confused
35856 - Directory authorities no longer try to download server
35857 descriptors that they know they will reject.
35859 o Features and updates:
35860 - Replace balanced trees with hash tables: this should make stuff
35861 significantly faster.
35862 - Resume using the AES counter-mode implementation that we ship,
35863 rather than OpenSSL's. Ours is significantly faster.
35864 - Many other CPU and memory improvements.
35865 - Add a new config option FastFirstHopPK (on by default) so clients
35866 do a trivial crypto handshake for their first hop, since TLS has
35867 already taken care of confidentiality and authentication.
35868 - Add a new config option TestSocks so people can see if their
35869 applications are using socks4, socks4a, socks5-with-ip, or
35870 socks5-with-hostname. This way they don't have to keep mucking
35871 with tcpdump and wondering if something got cached somewhere.
35872 - Warn when listening on a public address for socks. I suspect a
35873 lot of people are setting themselves up as open socks proxies,
35874 and they have no idea that jerks on the Internet are using them,
35875 since they simply proxy the traffic into the Tor network.
35876 - Add "private:*" as an alias in configuration for policies. Now
35877 you can simplify your exit policy rather than needing to list
35878 every single internal or nonroutable network space.
35879 - Add a new controller event type that allows controllers to get
35880 all server descriptors that were uploaded to a router in its role
35881 as authoritative dirserver.
35882 - Start shipping socks-extensions.txt, tor-doc-unix.html,
35883 tor-doc-server.html, and stylesheet.css in the tarball.
35884 - Stop shipping tor-doc.html in the tarball.
35887 Changes in version 0.1.1.9-alpha - 2005-11-15
35888 o Usability improvements:
35889 - Start calling it FooListenAddress rather than FooBindAddress,
35890 since few of our users know what it means to bind an address
35892 - Reduce clutter in server logs. We're going to try to make
35893 them actually usable now. New config option ProtocolWarnings that
35894 lets you hear about how _other Tors_ are breaking the protocol. Off
35896 - Divide log messages into logging domains. Once we put some sort
35897 of interface on this, it will let people looking at more verbose
35898 log levels specify the topics they want to hear more about.
35899 - Make directory servers return better http 404 error messages
35900 instead of a generic "Servers unavailable".
35901 - Check for even more Windows version flags when writing the platform
35902 string in server descriptors, and note any we don't recognize.
35903 - Clean up more of the OpenSSL memory when exiting, so we can detect
35904 memory leaks better.
35905 - Make directory authorities be non-versioning, non-naming by
35906 default. Now we can add new directory servers without requiring
35907 their operators to pay close attention.
35908 - When logging via syslog, include the pid whenever we provide
35909 a log entry. Suggested by Todd Fries.
35911 o Performance improvements:
35912 - Directory servers now silently throw away new descriptors that
35913 haven't changed much if the timestamps are similar. We do this to
35914 tolerate older Tor servers that upload a new descriptor every 15
35915 minutes. (It seemed like a good idea at the time.)
35916 - Inline bottleneck smartlist functions; use fast versions by default.
35917 - Add a "Map from digest to void*" abstraction digestmap_t so we
35918 can do less hex encoding/decoding. Use it in router_get_by_digest()
35919 to resolve a performance bottleneck.
35920 - Allow tor_gzip_uncompress to extract as much as possible from
35921 truncated compressed data. Try to extract as many
35922 descriptors as possible from truncated http responses (when
35923 DIR_PURPOSE_FETCH_ROUTERDESC).
35924 - Make circ->onionskin a pointer, not a static array. moria2 was using
35925 125000 circuit_t's after it had been up for a few weeks, which
35926 translates to 20+ megs of wasted space.
35927 - The private half of our EDH handshake keys are now chosen out
35928 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
35930 o Security improvements:
35931 - Start making directory caches retain old routerinfos, so soon
35932 clients can start asking by digest of descriptor rather than by
35933 fingerprint of server.
35934 - Add half our entropy from RAND_poll in OpenSSL. This knows how
35935 to use egd (if present), openbsd weirdness (if present), vms/os2
35936 weirdness (if we ever port there), and more in the future.
35938 o Bugfixes on 0.1.0.x:
35939 - Do round-robin writes of at most 16 kB per write. This might be
35940 more fair on loaded Tor servers, and it might resolve our Windows
35941 crash bug. It might also slow things down.
35942 - Our TLS handshakes were generating a single public/private
35943 keypair for the TLS context, rather than making a new one for
35944 each new connections. Oops. (But we were still rotating them
35945 periodically, so it's not so bad.)
35946 - When we were cannibalizing a circuit with a particular exit
35947 node in mind, we weren't checking to see if that exit node was
35948 already present earlier in the circuit. Oops.
35949 - When a Tor server's IP changes (e.g. from a dyndns address),
35950 upload a new descriptor so clients will learn too.
35951 - Really busy servers were keeping enough circuits open on stable
35952 connections that they were wrapping around the circuit_id
35953 space. (It's only two bytes.) This exposed a bug where we would
35954 feel free to reuse a circuit_id even if it still exists but has
35955 been marked for close. Try to fix this bug. Some bug remains.
35956 - If we would close a stream early (e.g. it asks for a .exit that
35957 we know would refuse it) but the LeaveStreamsUnattached config
35958 option is set by the controller, then don't close it.
35960 o Bugfixes on 0.1.1.8-alpha:
35961 - Fix a big pile of memory leaks, some of them serious.
35962 - Do not try to download a routerdesc if we would immediately reject
35964 - Resume inserting a newline between all router descriptors when
35965 generating (old style) signed directories, since our spec says
35967 - When providing content-type application/octet-stream for
35968 server descriptors using .z, we were leaving out the
35969 content-encoding header. Oops. (Everything tolerated this just
35970 fine, but that doesn't mean we need to be part of the problem.)
35971 - Fix a potential seg fault in getconf and getinfo using version 1
35972 of the controller protocol.
35973 - Avoid crash: do not check whether DirPort is reachable when we
35974 are suppressing it because of hibernation.
35975 - Make --hash-password not crash on exit.
35978 Changes in version 0.1.1.8-alpha - 2005-10-07
35979 o New features (major):
35980 - Clients don't download or use the directory anymore. Now they
35981 download and use network-statuses from the trusted dirservers,
35982 and fetch individual server descriptors as needed from mirrors.
35983 See dir-spec.txt for all the gory details.
35984 - Be more conservative about whether to advertise our DirPort.
35985 The main change is to not advertise if we're running at capacity
35986 and either a) we could hibernate or b) our capacity is low and
35987 we're using a default DirPort.
35988 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
35990 o New features (minor):
35991 - Try to be smart about when to retry network-status and
35992 server-descriptor fetches. Still needs some tuning.
35993 - Stop parsing, storing, or using running-routers output (but
35994 mirrors still cache and serve it).
35995 - Consider a threshold of versioning dirservers (dirservers who have
35996 an opinion about which Tor versions are still recommended) before
35997 deciding whether to warn the user that he's obsolete.
35998 - Dirservers can now reject/invalidate by key and IP, with the
35999 config options "AuthDirInvalid" and "AuthDirReject". This is
36000 useful since currently we automatically list servers as running
36001 and usable even if we know they're jerks.
36002 - Provide dire warnings to any users who set DirServer; move it out
36003 of torrc.sample and into torrc.complete.
36004 - Add MyFamily to torrc.sample in the server section.
36005 - Add nicknames to the DirServer line, so we can refer to them
36006 without requiring all our users to memorize their IP addresses.
36007 - When we get an EOF or a timeout on a directory connection, note
36008 how many bytes of serverdesc we are dropping. This will help
36009 us determine whether it is smart to parse incomplete serverdesc
36011 - Add a new function to "change pseudonyms" -- that is, to stop
36012 using any currently-dirty circuits for new streams, so we don't
36013 link new actions to old actions. Currently it's only called on
36014 HUP (or SIGNAL RELOAD).
36015 - On sighup, if UseHelperNodes changed to 1, use new circuits.
36016 - Start using RAND_bytes rather than RAND_pseudo_bytes from
36017 OpenSSL. Also, reseed our entropy every hour, not just at
36018 startup. And entropy in 512-bit chunks, not 160-bit chunks.
36020 o Fixes on 0.1.1.7-alpha:
36021 - Nobody ever implemented EVENT_ADDRMAP for control protocol
36022 version 0, so don't let version 0 controllers ask for it.
36023 - If you requested something with too many newlines via the
36024 v1 controller protocol, you could crash tor.
36025 - Fix a number of memory leaks, including some pretty serious ones.
36026 - Re-enable DirPort testing again, so Tor servers will be willing
36027 to advertise their DirPort if it's reachable.
36028 - On TLS handshake, only check the other router's nickname against
36029 its expected nickname if is_named is set.
36031 o Fixes forward-ported from 0.1.0.15:
36032 - Don't crash when we don't have any spare file descriptors and we
36033 try to spawn a dns or cpu worker.
36034 - Make the numbers in read-history and write-history into uint64s,
36035 so they don't overflow and publish negatives in the descriptor.
36037 o Fixes on 0.1.0.x:
36038 - For the OS X package's modified privoxy config file, comment
36039 out the "logfile" line so we don't log everything passed
36041 - We were whining about using socks4 or socks5-with-local-lookup
36042 even when it's an IP in the "virtual" range we designed exactly
36044 - We were leaking some memory every time the client changes IPs.
36045 - Never call free() on tor_malloc()d memory. This will help us
36046 use dmalloc to detect memory leaks.
36047 - Check for named servers when looking them up by nickname;
36048 warn when we'recalling a non-named server by its nickname;
36049 don't warn twice about the same name.
36050 - Try to list MyFamily elements by key, not by nickname, and warn
36051 if we've not heard of the server.
36052 - Make windows platform detection (uname equivalent) smarter.
36053 - It turns out sparc64 doesn't like unaligned access either.
36056 Changes in version 0.1.0.15 - 2005-09-23
36057 o Bugfixes on 0.1.0.x:
36058 - Reject ports 465 and 587 (spam targets) in default exit policy.
36059 - Don't crash when we don't have any spare file descriptors and we
36060 try to spawn a dns or cpu worker.
36061 - Get rid of IgnoreVersion undocumented config option, and make us
36062 only warn, never exit, when we're running an obsolete version.
36063 - Don't try to print a null string when your server finds itself to
36064 be unreachable and the Address config option is empty.
36065 - Make the numbers in read-history and write-history into uint64s,
36066 so they don't overflow and publish negatives in the descriptor.
36067 - Fix a minor memory leak in smartlist_string_remove().
36068 - We were only allowing ourselves to upload a server descriptor at
36069 most every 20 minutes, even if it changed earlier than that.
36070 - Clean up log entries that pointed to old URLs.
36073 Changes in version 0.1.1.7-alpha - 2005-09-14
36074 o Fixes on 0.1.1.6-alpha:
36075 - Exit servers were crashing when people asked them to make a
36076 connection to an address not in their exit policy.
36077 - Looking up a non-existent stream for a v1 control connection would
36079 - Fix a seg fault if we ask a dirserver for a descriptor by
36080 fingerprint but he doesn't know about him.
36081 - SETCONF was appending items to linelists, not clearing them.
36082 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
36083 out and refuse the setconf if it would fail.
36084 - Downgrade the dirserver log messages when whining about
36088 - Add Peter Palfrader's check-tor script to tor/contrib/
36089 It lets you easily check whether a given server (referenced by
36090 nickname) is reachable by you.
36091 - Numerous changes to move towards client-side v2 directories. Not
36094 o Fixes on 0.1.0.x:
36095 - If the user gave tor an odd number of command-line arguments,
36096 we were silently ignoring the last one. Now we complain and fail.
36097 [This wins the oldest-bug prize -- this bug has been present since
36098 November 2002, as released in Tor 0.0.0.]
36099 - Do not use unaligned memory access on alpha, mips, or mipsel.
36100 It *works*, but is very slow, so we treat them as if it doesn't.
36101 - Retry directory requests if we fail to get an answer we like
36102 from a given dirserver (we were retrying before, but only if
36103 we fail to connect).
36104 - When writing the RecommendedVersions line, sort them first.
36105 - When the client asked for a rendezvous port that the hidden
36106 service didn't want to provide, we were sending an IP address
36107 back along with the end cell. Fortunately, it was zero. But stop
36109 - Correct "your server is reachable" log entries to indicate that
36110 it was self-testing that told us so.
36113 Changes in version 0.1.1.6-alpha - 2005-09-09
36114 o Fixes on 0.1.1.5-alpha:
36115 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
36116 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
36117 - Fix bug with tor_memmem finding a match at the end of the string.
36118 - Make unit tests run without segfaulting.
36119 - Resolve some solaris x86 compile warnings.
36120 - Handle duplicate lines in approved-routers files without warning.
36121 - Fix bug where as soon as a server refused any requests due to his
36122 exit policy (e.g. when we ask for localhost and he tells us that's
36123 127.0.0.1 and he won't do it), we decided he wasn't obeying his
36124 exit policy using him for any exits.
36125 - Only do openssl hardware accelerator stuff if openssl version is
36128 o New controller features/fixes:
36129 - Add a "RESETCONF" command so you can set config options like
36130 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
36131 a config option in the torrc with no value, then it clears it
36132 entirely (rather than setting it to its default).
36133 - Add a "GETINFO config-file" to tell us where torrc is.
36134 - Avoid sending blank lines when GETINFO replies should be empty.
36135 - Add a QUIT command for the controller (for using it manually).
36136 - Fix a bug in SAVECONF that was adding default dirservers and
36137 other redundant entries to the torrc file.
36139 o Start on the new directory design:
36140 - Generate, publish, cache, serve new network-status format.
36141 - Publish individual descriptors (by fingerprint, by "all", and by
36143 - Publish client and server recommended versions separately.
36144 - Allow tor_gzip_uncompress() to handle multiple concatenated
36145 compressed strings. Serve compressed groups of router
36146 descriptors. The compression logic here could be more
36148 - Distinguish v1 authorities (all currently trusted directories)
36149 from v2 authorities (all trusted directories).
36150 - Change DirServers config line to note which dirs are v1 authorities.
36151 - Add configuration option "V1AuthoritativeDirectory 1" which
36152 moria1, moria2, and tor26 should set.
36153 - Remove option when getting directory cache to see whether they
36154 support running-routers; they all do now. Replace it with one
36155 to see whether caches support v2 stuff.
36158 - Dirservers now do their own external reachability testing of each
36159 Tor server, and only list them as running if they've been found to
36160 be reachable. We also send back warnings to the server's logs if
36161 it uploads a descriptor that we already believe is unreachable.
36162 - Implement exit enclaves: if we know an IP address for the
36163 destination, and there's a running Tor server at that address
36164 which allows exit to the destination, then extend the circuit to
36165 that exit first. This provides end-to-end encryption and end-to-end
36166 authentication. Also, if the user wants a .exit address or enclave,
36167 use 4 hops rather than 3, and cannibalize a general circ for it
36169 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
36170 controller. Also, rotate dns and cpu workers if the controller
36171 changes options that will affect them; and initialize the dns
36172 worker cache tree whether or not we start out as a server.
36173 - Only upload a new server descriptor when options change, 18
36174 hours have passed, uptime is reset, or bandwidth changes a lot.
36175 - Check [X-]Forwarded-For headers in HTTP requests when generating
36176 log messages. This lets people run dirservers (and caches) behind
36177 Apache but still know which IP addresses are causing warnings.
36179 o Config option changes:
36180 - Replace (Fascist)Firewall* config options with a new
36181 ReachableAddresses option that understands address policies.
36182 For example, "ReachableAddresses *:80,*:443"
36183 - Get rid of IgnoreVersion undocumented config option, and make us
36184 only warn, never exit, when we're running an obsolete version.
36185 - Make MonthlyAccountingStart config option truly obsolete now.
36187 o Fixes on 0.1.0.x:
36188 - Reject ports 465 and 587 in the default exit policy, since
36189 people have started using them for spam too.
36190 - It turns out we couldn't bootstrap a network since we added
36191 reachability detection in 0.1.0.1-rc. Good thing the Tor network
36192 has never gone down. Add an AssumeReachable config option to let
36193 servers and dirservers bootstrap. When we're trying to build a
36194 high-uptime or high-bandwidth circuit but there aren't enough
36195 suitable servers, try being less picky rather than simply failing.
36196 - Our logic to decide if the OR we connected to was the right guy
36197 was brittle and maybe open to a mitm for unverified routers.
36198 - We weren't cannibalizing circuits correctly for
36199 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
36200 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
36201 build those from scratch. This should make hidden services faster.
36202 - Predict required circuits better, with an eye toward making hidden
36203 services faster on the service end.
36204 - Retry streams if the exit node sends back a 'misc' failure. This
36205 should result in fewer random failures. Also, after failing
36206 from resolve failed or misc, reset the num failures, so we give
36207 it a fair shake next time we try.
36208 - Clean up the rendezvous warn log msgs, and downgrade some to info.
36209 - Reduce severity on logs about dns worker spawning and culling.
36210 - When we're shutting down and we do something like try to post a
36211 server descriptor or rendezvous descriptor, don't complain that
36212 we seem to be unreachable. Of course we are, we're shutting down.
36213 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
36214 We don't use them yet, but maybe one day our DNS resolver will be
36215 able to discover them.
36216 - Make ContactInfo mandatory for authoritative directory servers.
36217 - Require server descriptors to list IPv4 addresses -- hostnames
36218 are no longer allowed. This also fixes some potential security
36219 problems with people providing hostnames as their address and then
36220 preferentially resolving them to partition users.
36221 - Change log line for unreachability to explicitly suggest /etc/hosts
36222 as the culprit. Also make it clearer what IP address and ports we're
36223 testing for reachability.
36224 - Put quotes around user-supplied strings when logging so users are
36225 more likely to realize if they add bad characters (like quotes)
36227 - Let auth dir servers start without specifying an Address config
36229 - Make unit tests (and other invocations that aren't the real Tor)
36230 run without launching listeners, creating subdirectories, and so on.
36233 Changes in version 0.1.1.5-alpha - 2005-08-08
36234 o Bugfixes included in 0.1.0.14.
36236 o Bugfixes on 0.1.0.x:
36237 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
36238 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
36239 it would silently using ignore the 6668.
36242 Changes in version 0.1.0.14 - 2005-08-08
36243 o Bugfixes on 0.1.0.x:
36244 - Fix the other half of the bug with crypto handshakes
36246 - Fix an assert trigger if you send a 'signal term' via the
36247 controller when it's listening for 'event info' messages.
36250 Changes in version 0.1.1.4-alpha - 2005-08-04
36251 o Bugfixes included in 0.1.0.13.
36254 - Improve tor_gettimeofday() granularity on windows.
36255 - Make clients regenerate their keys when their IP address changes.
36256 - Implement some more GETINFO goodness: expose helper nodes, config
36257 options, getinfo keys.
36260 Changes in version 0.1.0.13 - 2005-08-04
36261 o Bugfixes on 0.1.0.x:
36262 - Fix a critical bug in the security of our crypto handshakes.
36263 - Fix a size_t underflow in smartlist_join_strings2() that made
36264 it do bad things when you hand it an empty smartlist.
36265 - Fix Windows installer to ship Tor license (thanks to Aphex for
36266 pointing out this oversight) and put a link to the doc directory
36268 - Explicitly set no-unaligned-access for sparc: it turns out the
36269 new gcc's let you compile broken code, but that doesn't make it
36273 Changes in version 0.1.1.3-alpha - 2005-07-23
36274 o Bugfixes on 0.1.1.2-alpha:
36275 - Fix a bug in handling the controller's "post descriptor"
36277 - Fix several bugs in handling the controller's "extend circuit"
36279 - Fix a bug in handling the controller's "stream status" event.
36280 - Fix an assert failure if we have a controller listening for
36281 circuit events and we go offline.
36282 - Re-allow hidden service descriptors to publish 0 intro points.
36283 - Fix a crash when generating your hidden service descriptor if
36284 you don't have enough intro points already.
36286 o New features on 0.1.1.2-alpha:
36287 - New controller function "getinfo accounting", to ask how
36288 many bytes we've used in this time period.
36289 - Experimental support for helper nodes: a lot of the risk from
36290 a small static adversary comes because users pick new random
36291 nodes every time they rebuild a circuit. Now users will try to
36292 stick to the same small set of entry nodes if they can. Not
36293 enabled by default yet.
36295 o Bugfixes on 0.1.0.12:
36296 - If you're an auth dir server, always publish your dirport,
36297 even if you haven't yet found yourself to be reachable.
36298 - Fix a size_t underflow in smartlist_join_strings2() that made
36299 it do bad things when you hand it an empty smartlist.
36302 Changes in version 0.1.0.12 - 2005-07-18
36303 o New directory servers:
36304 - tor26 has changed IP address.
36306 o Bugfixes on 0.1.0.x:
36307 - Fix a possible double-free in tor_gzip_uncompress().
36308 - When --disable-threads is set, do not search for or link against
36309 pthreads libraries.
36310 - Don't trigger an assert if an authoritative directory server
36311 claims its dirport is 0.
36312 - Fix bug with removing Tor as an NT service: some people were
36313 getting "The service did not return an error." Thanks to Matt
36317 Changes in version 0.1.1.2-alpha - 2005-07-15
36318 o New directory servers:
36319 - tor26 has changed IP address.
36321 o Bugfixes on 0.1.0.x, crashes/leaks:
36322 - Port the servers-not-obeying-their-exit-policies fix from
36324 - Fix an fd leak in start_daemon().
36325 - On Windows, you can't always reopen a port right after you've
36326 closed it. So change retry_listeners() to only close and re-open
36327 ports that have changed.
36328 - Fix a possible double-free in tor_gzip_uncompress().
36330 o Bugfixes on 0.1.0.x, usability:
36331 - When tor_socketpair() fails in Windows, give a reasonable
36332 Windows-style errno back.
36333 - Let people type "tor --install" as well as "tor -install" when
36335 want to make it an NT service.
36336 - NT service patch from Matt Edman to improve error messages.
36337 - When the controller asks for a config option with an abbreviated
36338 name, give the full name in our response.
36339 - Correct the man page entry on TrackHostExitsExpire.
36340 - Looks like we were never delivering deflated (i.e. compressed)
36341 running-routers lists, even when asked. Oops.
36342 - When --disable-threads is set, do not search for or link against
36343 pthreads libraries.
36345 o Bugfixes on 0.1.1.x:
36346 - Fix a seg fault with autodetecting which controller version is
36350 - New hidden service descriptor format: put a version in it, and
36351 let people specify introduction/rendezvous points that aren't
36352 in "the directory" (which is subjective anyway).
36353 - Allow the DEBUG controller event to work again. Mark certain log
36354 entries as "don't tell this to controllers", so we avoid cycles.
36357 Changes in version 0.1.0.11 - 2005-06-30
36358 o Bugfixes on 0.1.0.x:
36359 - Fix major security bug: servers were disregarding their
36360 exit policies if clients behaved unexpectedly.
36361 - Make OS X init script check for missing argument, so we don't
36362 confuse users who invoke it incorrectly.
36363 - Fix a seg fault in "tor --hash-password foo".
36364 - The MAPADDRESS control command was broken.
36367 Changes in version 0.1.1.1-alpha - 2005-06-29
36369 - Make OS X init script check for missing argument, so we don't
36370 confuse users who invoke it incorrectly.
36371 - Fix a seg fault in "tor --hash-password foo".
36372 - Fix a possible way to DoS dirservers.
36373 - When we complain that your exit policy implicitly allows local or
36374 private address spaces, name them explicitly so operators can
36376 - Make the log message less scary when all the dirservers are
36377 temporarily unreachable.
36378 - We were printing the number of idle dns workers incorrectly when
36382 - Revised controller protocol (version 1) that uses ascii rather
36383 than binary. Add supporting libraries in python and java so you
36384 can use the controller from your applications without caring how
36385 our protocol works.
36386 - Spiffy new support for crypto hardware accelerators. Can somebody
36390 Changes in version 0.0.9.10 - 2005-06-16
36391 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
36392 - Refuse relay cells that claim to have a length larger than the
36393 maximum allowed. This prevents a potential attack that could read
36394 arbitrary memory (e.g. keys) from an exit server's process
36398 Changes in version 0.1.0.10 - 2005-06-14
36399 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
36400 libevent before 1.1a.
36403 Changes in version 0.1.0.9-rc - 2005-06-09
36405 - Reset buf->highwater every time buf_shrink() is called, not just on
36406 a successful shrink. This was causing significant memory bloat.
36407 - Fix buffer overflow when checking hashed passwords.
36408 - Security fix: if seeding the RNG on Win32 fails, quit.
36409 - Allow seeding the RNG on Win32 even when you're not running as
36411 - Disable threading on Solaris too. Something is wonky with it,
36412 cpuworkers, and reentrant libs.
36413 - Reenable the part of the code that tries to flush as soon as an
36414 OR outbuf has a full TLS record available. Perhaps this will make
36415 OR outbufs not grow as huge except in rare cases, thus saving lots
36416 of CPU time plus memory.
36417 - Reject malformed .onion addresses rather then passing them on as
36418 normal web requests.
36419 - Adapt patch from Adam Langley: fix possible memory leak in
36420 tor_lookup_hostname().
36421 - Initialize libevent later in the startup process, so the logs are
36422 already established by the time we start logging libevent warns.
36423 - Use correct errno on win32 if libevent fails.
36424 - Check and warn about known-bad/slow libevent versions.
36425 - Pay more attention to the ClientOnly config option.
36426 - Have torctl.in/tor.sh.in check for location of su binary (needed
36428 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
36429 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
36430 HttpProxyAuthenticator
36431 - Stop warning about sigpipes in the logs. We're going to
36432 pretend that getting these occasionally is normal and fine.
36433 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
36435 installer screens; and don't put stuff into StartupItems unless
36436 the user asks you to.
36437 - Require servers that use the default dirservers to have public IP
36438 addresses. We have too many servers that are configured with private
36439 IPs and their admins never notice the log entries complaining that
36440 their descriptors are being rejected.
36441 - Add OSX uninstall instructions. An actual uninstall script will
36445 Changes in version 0.1.0.8-rc - 2005-05-23
36447 - It turns out that kqueue on OS X 10.3.9 was causing kernel
36448 panics. Disable kqueue on all OS X Tors.
36449 - Fix RPM: remove duplicate line accidentally added to the rpm
36451 - Disable threads on openbsd too, since its gethostaddr is not
36453 - Tolerate libevent 0.8 since it still works, even though it's
36455 - Enable building on Red Hat 9.0 again.
36456 - Allow the middle hop of the testing circuit to be running any
36457 version, now that most of them have the bugfix to let them connect
36458 to unknown servers. This will allow reachability testing to work
36459 even when 0.0.9.7-0.0.9.9 become obsolete.
36460 - Handle relay cells with rh.length too large. This prevents
36461 a potential attack that could read arbitrary memory (maybe even
36462 keys) from the exit server's process.
36463 - We screwed up the dirport reachability testing when we don't yet
36464 have a cached version of the directory. Hopefully now fixed.
36465 - Clean up router_load_single_router() (used by the controller),
36466 so it doesn't seg fault on error.
36467 - Fix a minor memory leak when somebody establishes an introduction
36468 point at your Tor server.
36469 - If a socks connection ends because read fails, don't warn that
36470 you're not sending a socks reply back.
36473 - Add HttpProxyAuthenticator config option too, that works like
36474 the HttpsProxyAuthenticator config option.
36475 - Encode hashed controller passwords in hex instead of base64,
36476 to make it easier to write controllers.
36479 Changes in version 0.1.0.7-rc - 2005-05-17
36481 - Fix a bug in the OS X package installer that prevented it from
36482 installing on Tiger.
36483 - Fix a script bug in the OS X package installer that made it
36484 complain during installation.
36485 - Find libevent even if it's hiding in /usr/local/ and your
36486 CFLAGS and LDFLAGS don't tell you to look there.
36487 - Be able to link with libevent as a shared library (the default
36488 after 1.0d), even if it's hiding in /usr/local/lib and even
36489 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
36490 assuming you're running gcc. Otherwise fail and give a useful
36492 - Fix a bug in the RPM packager: set home directory for _tor to
36493 something more reasonable when first installing.
36494 - Free a minor amount of memory that is still reachable on exit.
36497 Changes in version 0.1.0.6-rc - 2005-05-14
36499 - Implement --disable-threads configure option. Disable threads on
36500 netbsd by default, because it appears to have no reentrant resolver
36502 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
36503 release (1.1) detects and disables kqueue if it's broken.
36504 - Append default exit policy before checking for implicit internal
36505 addresses. Now we don't log a bunch of complaints on startup
36506 when using the default exit policy.
36507 - Some people were putting "Address " in their torrc, and they had
36508 a buggy resolver that resolved " " to 0.0.0.0. Oops.
36509 - If DataDir is ~/.tor, and that expands to /.tor, then default to
36510 LOCALSTATEDIR/tor instead.
36511 - Fix fragmented-message bug in TorControl.py.
36512 - Resolve a minor bug which would prevent unreachable dirports
36513 from getting suppressed in the published descriptor.
36514 - When the controller gave us a new descriptor, we weren't resolving
36515 it immediately, so Tor would think its address was 0.0.0.0 until
36516 we fetched a new directory.
36517 - Fix an uppercase/lowercase case error in suppressing a bogus
36518 libevent warning on some Linuxes.
36521 - Begin scrubbing sensitive strings from logs by default. Turn off
36522 the config option SafeLogging if you need to do debugging.
36523 - Switch to a new buffer management algorithm, which tries to avoid
36524 reallocing and copying quite as much. In first tests it looks like
36525 it uses *more* memory on average, but less cpu.
36526 - First cut at support for "create-fast" cells. Clients can use
36527 these when extending to their first hop, since the TLS already
36528 provides forward secrecy and authentication. Not enabled on
36530 - When dirservers refuse a router descriptor, we now log its
36531 contactinfo, platform, and the poster's IP address.
36532 - Call tor_free_all instead of connections_free_all after forking, to
36533 save memory on systems that need to fork.
36534 - Whine at you if you're a server and you don't set your contactinfo.
36535 - Implement --verify-config command-line option to check if your torrc
36536 is valid without actually launching Tor.
36537 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
36538 rather than just rejecting it.
36541 Changes in version 0.1.0.5-rc - 2005-04-27
36543 - Stop trying to print a null pointer if an OR conn fails because
36544 we didn't like its cert.
36546 - Switch our internal buffers implementation to use a ring buffer,
36547 to hopefully improve performance for fast servers a lot.
36548 - Add HttpsProxyAuthenticator support (basic auth only), based
36549 on patch from Adam Langley.
36550 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
36551 the fast servers that have been joining lately.
36552 - Give hidden service accesses extra time on the first attempt,
36553 since 60 seconds is often only barely enough. This might improve
36555 - Improve performance for dirservers: stop re-parsing the whole
36556 directory every time you regenerate it.
36557 - Add more debugging info to help us find the weird dns freebsd
36558 pthreads bug; cleaner debug messages to help track future issues.
36561 Changes in version 0.0.9.9 - 2005-04-23
36562 o Bugfixes on 0.0.9.x:
36563 - If unofficial Tor clients connect and send weird TLS certs, our
36564 Tor server triggers an assert. This release contains a minimal
36565 backport from the broader fix that we put into 0.1.0.4-rc.
36568 Changes in version 0.1.0.4-rc - 2005-04-23
36570 - If unofficial Tor clients connect and send weird TLS certs, our
36571 Tor server triggers an assert. Stop asserting, and start handling
36572 TLS errors better in other situations too.
36573 - When the controller asks us to tell it about all the debug-level
36574 logs, it turns out we were generating debug-level logs while
36575 telling it about them, which turns into a bad loop. Now keep
36576 track of whether you're sending a debug log to the controller,
36577 and don't log when you are.
36578 - Fix the "postdescriptor" feature of the controller interface: on
36579 non-complete success, only say "done" once.
36581 - Clients are now willing to load balance over up to 2mB, not 1mB,
36582 of advertised bandwidth capacity.
36583 - Add a NoPublish config option, so you can be a server (e.g. for
36584 testing running Tor servers in other Tor networks) without
36585 publishing your descriptor to the primary dirservers.
36588 Changes in version 0.1.0.3-rc - 2005-04-08
36589 o Improvements on 0.1.0.2-rc:
36590 - Client now retries when streams end early for 'hibernating' or
36591 'resource limit' reasons, rather than failing them.
36592 - More automated handling for dirserver operators:
36593 - Automatically approve nodes running 0.1.0.2-rc or later,
36594 now that the the reachability detection stuff is working.
36595 - Now we allow two unverified servers with the same nickname
36596 but different keys. But if a nickname is verified, only that
36597 nickname+key are allowed.
36598 - If you're an authdirserver connecting to an address:port,
36599 and it's not the OR you were expecting, forget about that
36600 descriptor. If he *was* the one you were expecting, then forget
36601 about all other descriptors for that address:port.
36602 - Allow servers to publish descriptors from 12 hours in the future.
36603 Corollary: only whine about clock skew from the dirserver if
36604 he's a trusted dirserver (since now even verified servers could
36605 have quite wrong clocks).
36606 - Adjust maximum skew and age for rendezvous descriptors: let skew
36607 be 48 hours rather than 90 minutes.
36608 - Efficiency improvements:
36609 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
36610 it much faster to look up a circuit for each relay cell.
36611 - Remove most calls to assert_all_pending_dns_resolves_ok(),
36612 since they're eating our cpu on exit nodes.
36613 - Stop wasting time doing a case insensitive comparison for every
36614 dns name every time we do any lookup. Canonicalize the names to
36615 lowercase and be done with it.
36616 - Start sending 'truncated' cells back rather than destroy cells,
36617 if the circuit closes in front of you. This means we won't have
36618 to abandon partially built circuits.
36619 - Only warn once per nickname from add_nickname_list_to_smartlist
36620 per failure, so an entrynode or exitnode choice that's down won't
36622 - Put a note in the torrc about abuse potential with the default
36624 - Revise control spec and implementation to allow all log messages to
36625 be sent to controller with their severities intact (suggested by
36626 Matt Edman). Update TorControl to handle new log event types.
36627 - Provide better explanation messages when controller's POSTDESCRIPTOR
36629 - Stop putting nodename in the Platform string in server descriptors.
36630 It doesn't actually help, and it is confusing/upsetting some people.
36632 o Bugfixes on 0.1.0.2-rc:
36633 - We were printing the host mask wrong in exit policies in server
36634 descriptors. This isn't a critical bug though, since we were still
36635 obeying the exit policy internally.
36636 - Fix Tor when compiled with libevent but without pthreads: move
36637 connection_unregister() from _connection_free() to
36639 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
36640 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
36641 when we look through the connection array, we'll find any of the
36642 cpu/dnsworkers. This is no good.
36644 o Bugfixes on 0.0.9.8:
36645 - Fix possible bug on threading platforms (e.g. win32) which was
36646 leaking a file descriptor whenever a cpuworker or dnsworker died.
36647 - When using preferred entry or exit nodes, ignore whether the
36648 circuit wants uptime or capacity. They asked for the nodes, they
36650 - chdir() to your datadirectory at the *end* of the daemonize process,
36651 not the beginning. This was a problem because the first time you
36652 run tor, if your datadir isn't there, and you have runasdaemon set
36653 to 1, it will try to chdir to it before it tries to create it. Oops.
36654 - Handle changed router status correctly when dirserver reloads
36655 fingerprint file. We used to be dropping all unverified descriptors
36656 right then. The bug was hidden because we would immediately
36657 fetch a directory from another dirserver, which would include the
36658 descriptors we just dropped.
36659 - When we're connecting to an OR and he's got a different nickname/key
36660 than we were expecting, only complain loudly if we're an OP or a
36661 dirserver. Complaining loudly to the OR admins just confuses them.
36662 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
36663 artificially capped at 500kB.
36666 Changes in version 0.0.9.8 - 2005-04-07
36667 o Bugfixes on 0.0.9.x:
36668 - We have a bug that I haven't found yet. Sometimes, very rarely,
36669 cpuworkers get stuck in the 'busy' state, even though the cpuworker
36670 thinks of itself as idle. This meant that no new circuits ever got
36671 established. Here's a workaround to kill any cpuworker that's been
36672 busy for more than 100 seconds.
36675 Changes in version 0.1.0.2-rc - 2005-04-01
36676 o Bugfixes on 0.1.0.1-rc:
36677 - Fixes on reachability detection:
36678 - Don't check for reachability while hibernating.
36679 - If ORPort is reachable but DirPort isn't, still publish the
36680 descriptor, but zero out DirPort until it's found reachable.
36681 - When building testing circs for ORPort testing, use only
36682 high-bandwidth nodes, so fewer circuits fail.
36683 - Complain about unreachable ORPort separately from unreachable
36684 DirPort, so the user knows what's going on.
36685 - Make sure we only conclude ORPort reachability if we didn't
36686 initiate the conn. Otherwise we could falsely conclude that
36687 we're reachable just because we connected to the guy earlier
36688 and he used that same pipe to extend to us.
36689 - Authdirservers shouldn't do ORPort reachability detection,
36690 since they're in clique mode, so it will be rare to find a
36691 server not already connected to them.
36692 - When building testing circuits, always pick middle hops running
36693 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
36694 bug. (This is a kludge; it will go away when 0.0.9.x becomes
36696 - When we decide we're reachable, actually publish our descriptor
36698 - Fix bug in redirectstream in the controller.
36699 - Fix the state descriptor strings so logs don't claim edge streams
36700 are in a different state than they actually are.
36701 - Use recent libevent features when possible (this only really affects
36702 win32 and osx right now, because the new libevent with these
36703 features hasn't been released yet). Add code to suppress spurious
36705 - Prevent possible segfault in connection_close_unattached_ap().
36706 - Fix newlines on torrc in win32.
36707 - Improve error msgs when tor-resolve fails.
36709 o Improvements on 0.0.9.x:
36710 - New experimental script tor/contrib/ExerciseServer.py (needs more
36711 work) that uses the controller interface to build circuits and
36712 fetch pages over them. This will help us bootstrap servers that
36713 have lots of capacity but haven't noticed it yet.
36714 - New experimental script tor/contrib/PathDemo.py (needs more work)
36715 that uses the controller interface to let you choose whole paths
36717 "<hostname>.<path,separated by dots>.<length of path>.path"
36718 - When we've connected to an OR and handshaked but didn't like
36719 the result, we were closing the conn without sending destroy
36720 cells back for pending circuits. Now send those destroys.
36723 Changes in version 0.0.9.7 - 2005-04-01
36724 o Bugfixes on 0.0.9.x:
36725 - Fix another race crash bug (thanks to Glenn Fink for reporting).
36726 - Compare identity to identity, not to nickname, when extending to
36727 a router not already in the directory. This was preventing us from
36728 extending to unknown routers. Oops.
36729 - Make sure to create OS X Tor user in <500 range, so we aren't
36730 creating actual system users.
36731 - Note where connection-that-hasn't-sent-end was marked, and fix
36732 a few really loud instances of this harmless bug (it's fixed more
36736 Changes in version 0.1.0.1-rc - 2005-03-28
36738 - Add reachability testing. Your Tor server will automatically try
36739 to see if its ORPort and DirPort are reachable from the outside,
36740 and it won't upload its descriptor until it decides they are.
36741 - Handle unavailable hidden services better. Handle slow or busy
36742 hidden services better.
36743 - Add support for CONNECTing through https proxies, with "HttpsProxy"
36745 - New exit policy: accept most low-numbered ports, rather than
36746 rejecting most low-numbered ports.
36747 - More Tor controller support (still experimental). See
36748 http://tor.eff.org/doc/control-spec.txt for all the new features,
36749 including signals to emulate unix signals from any platform;
36750 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
36751 closestream; closecircuit; etc.
36752 - Make nt services work and start on startup on win32 (based on
36753 patch by Matt Edman).
36754 - Add a new AddressMap config directive to rewrite incoming socks
36755 addresses. This lets you, for example, declare an implicit
36756 required exit node for certain sites.
36757 - Add a new TrackHostExits config directive to trigger addressmaps
36758 for certain incoming socks addresses -- for sites that break when
36759 your exit keeps changing (based on patch by Mike Perry).
36760 - Redo the client-side dns cache so it's just an addressmap too.
36761 - Notice when our IP changes, and reset stats/uptime/reachability.
36762 - When an application is using socks5, give him the whole variety of
36763 potential socks5 responses (connect refused, host unreachable, etc),
36764 rather than just "success" or "failure".
36765 - A more sane version numbering system. See
36766 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
36767 - New contributed script "exitlist": a simple python script to
36768 parse directories and find Tor nodes that exit to listed
36770 - New contributed script "privoxy-tor-toggle" to toggle whether
36771 Privoxy uses Tor. Seems to be configured for Debian by default.
36772 - Report HTTP reasons to client when getting a response from directory
36773 servers -- so you can actually know what went wrong.
36774 - New config option MaxAdvertisedBandwidth which lets you advertise
36775 a low bandwidthrate (to not attract as many circuits) while still
36776 allowing a higher bandwidthrate in reality.
36778 o Robustness/stability fixes:
36779 - Make Tor use Niels Provos's libevent instead of its current
36780 poll-but-sometimes-select mess. This will let us use faster async
36781 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
36783 - pthread support now too. This was forced because when we forked,
36784 we ended up wasting a lot of duplicate ram over time. Also switch
36785 to foo_r versions of some library calls to allow reentry and
36787 - Better handling for heterogeneous / unreliable nodes:
36788 - Annotate circuits w/ whether they aim to contain high uptime nodes
36789 and/or high capacity nodes. When building circuits, choose
36791 - This means that every single node in an intro rend circuit,
36792 not just the last one, will have a minimum uptime.
36793 - New config option LongLivedPorts to indicate application streams
36794 that will want high uptime circuits.
36795 - Servers reset uptime when a dir fetch entirely fails. This
36796 hopefully reflects stability of the server's network connectivity.
36797 - If somebody starts his tor server in Jan 2004 and then fixes his
36798 clock, don't make his published uptime be a year.
36799 - Reset published uptime when you wake up from hibernation.
36800 - Introduce a notion of 'internal' circs, which are chosen without
36801 regard to the exit policy of the last hop. Intro and rendezvous
36802 circs must be internal circs, to avoid leaking information. Resolve
36803 and connect streams can use internal circs if they want.
36804 - New circuit pooling algorithm: make sure to have enough circs around
36805 to satisfy any predicted ports, and also make sure to have 2 internal
36806 circs around if we've required internal circs lately (and with high
36807 uptime if we've seen that lately too).
36808 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
36809 which describes how often we retry making new circuits if current
36810 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
36811 how long we're willing to make use of an already-dirty circuit.
36812 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
36813 circ as necessary, if there are any completed ones lying around
36814 when we try to launch one.
36815 - Make hidden services try to establish a rendezvous for 30 seconds,
36816 rather than for n (where n=3) attempts to build a circuit.
36817 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
36818 "ShutdownWaitLength".
36819 - Try to be more zealous about calling connection_edge_end when
36820 things go bad with edge conns in connection.c.
36821 - Revise tor-spec to add more/better stream end reasons.
36822 - Revise all calls to connection_edge_end to avoid sending "misc",
36823 and to take errno into account where possible.
36826 - Fix a race condition that can trigger an assert, when we have a
36827 pending create cell and an OR connection fails right then.
36828 - Fix several double-mark-for-close bugs, e.g. where we were finding
36829 a conn for a cell even if that conn is already marked for close.
36830 - Make sequence of log messages when starting on win32 with no config
36831 file more reasonable.
36832 - When choosing an exit node for a new non-internal circ, don't take
36833 into account whether it'll be useful for any pending x.onion
36834 addresses -- it won't.
36835 - Turn addr_policy_compare from a tristate to a quadstate; this should
36836 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
36837 for google.com" problem.
36838 - Make "platform" string in descriptor more accurate for Win32 servers,
36839 so it's not just "unknown platform".
36840 - Fix an edge case in parsing config options (thanks weasel).
36841 If they say "--" on the commandline, it's not an option.
36842 - Reject odd-looking addresses at the client (e.g. addresses that
36843 contain a colon), rather than having the server drop them because
36845 - tor-resolve requests were ignoring .exit if there was a working circuit
36846 they could use instead.
36847 - REUSEADDR on normal platforms means you can rebind to the port
36848 right after somebody else has let it go. But REUSEADDR on win32
36849 means to let you bind to the port _even when somebody else
36850 already has it bound_! So, don't do that on Win32.
36851 - Change version parsing logic: a version is "obsolete" if it is not
36852 recommended and (1) there is a newer recommended version in the
36853 same series, or (2) there are no recommended versions in the same
36854 series, but there are some recommended versions in a newer series.
36855 A version is "new" if it is newer than any recommended version in
36857 - Stop most cases of hanging up on a socks connection without sending
36861 - Require BandwidthRate to be at least 20kB/s for servers.
36862 - When a dirserver causes you to give a warn, mention which dirserver
36864 - New config option DirAllowPrivateAddresses for authdirservers.
36865 Now by default they refuse router descriptors that have non-IP or
36866 private-IP addresses.
36867 - Stop publishing socksport in the directory, since it's not
36868 actually meant to be public. For compatibility, publish a 0 there
36870 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
36871 smart" value, that is low for servers and high for clients.
36872 - If our clock jumps forward by 100 seconds or more, assume something
36873 has gone wrong with our network and abandon all not-yet-used circs.
36874 - Warn when exit policy implicitly allows local addresses.
36875 - If we get an incredibly skewed timestamp from a dirserver mirror
36876 that isn't a verified OR, don't warn -- it's probably him that's
36878 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
36879 cookies to disk and doesn't log each web request to disk. (Thanks
36880 to Brett Carrington for pointing this out.)
36881 - When a client asks us for a dir mirror and we don't have one,
36882 launch an attempt to get a fresh one.
36883 - If we're hibernating and we get a SIGINT, exit immediately.
36884 - Add --with-dmalloc ./configure option, to track memory leaks.
36885 - And try to free all memory on closing, so we can detect what
36887 - Cache local dns resolves correctly even when they're .exit
36889 - Give a better warning when some other server advertises an
36890 ORPort that is actually an apache running ssl.
36891 - Add "opt hibernating 1" to server descriptor to make it clearer
36892 whether the server is hibernating.
36895 Changes in version 0.0.9.6 - 2005-03-24
36896 o Bugfixes on 0.0.9.x (crashes and asserts):
36897 - Add new end stream reasons to maintenance branch. Fix bug where
36898 reason (8) could trigger an assert. Prevent bug from recurring.
36899 - Apparently win32 stat wants paths to not end with a slash.
36900 - Fix assert triggers in assert_cpath_layer_ok(), where we were
36901 blowing away the circuit that conn->cpath_layer points to, then
36902 checking to see if the circ is well-formed. Backport check to make
36903 sure we dont use the cpath on a closed connection.
36904 - Prevent circuit_resume_edge_reading_helper() from trying to package
36905 inbufs for marked-for-close streams.
36906 - Don't crash on hup if your options->address has become unresolvable.
36907 - Some systems (like OS X) sometimes accept() a connection and tell
36908 you the remote host is 0.0.0.0:0. If this happens, due to some
36909 other mis-features, we get confused; so refuse the conn for now.
36911 o Bugfixes on 0.0.9.x (other):
36912 - Fix harmless but scary "Unrecognized content encoding" warn message.
36913 - Add new stream error reason: TORPROTOCOL reason means "you are not
36914 speaking a version of Tor I understand; say bye-bye to your stream."
36915 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
36916 into the future, now that we are more tolerant of skew. This
36917 resolves a bug where a Tor server would refuse to cache a directory
36918 because all the directories it gets are too far in the future;
36919 yet the Tor server never logs any complaints about clock skew.
36920 - Mac packaging magic: make man pages useable, and do not overwrite
36921 existing torrc files.
36922 - Make OS X log happily to /var/log/tor/tor.log
36925 Changes in version 0.0.9.5 - 2005-02-22
36926 o Bugfixes on 0.0.9.x:
36927 - Fix an assert race at exit nodes when resolve requests fail.
36928 - Stop picking unverified dir mirrors--it only leads to misery.
36929 - Patch from Matt Edman to make NT services work better. Service
36930 support is still not compiled into the executable by default.
36931 - Patch from Dmitri Bely so the Tor service runs better under
36932 the win32 SYSTEM account.
36933 - Make tor-resolve actually work (?) on Win32.
36934 - Fix a sign bug when getrlimit claims to have 4+ billion
36935 file descriptors available.
36936 - Stop refusing to start when bandwidthburst == bandwidthrate.
36937 - When create cells have been on the onion queue more than five
36938 seconds, just send back a destroy and take them off the list.
36941 Changes in version 0.0.9.4 - 2005-02-03
36942 o Bugfixes on 0.0.9:
36943 - Fix an assert bug that took down most of our servers: when
36944 a server claims to have 1 GB of bandwidthburst, don't
36946 - Don't crash as badly if we have spawned the max allowed number
36947 of dnsworkers, or we're out of file descriptors.
36948 - Block more file-sharing ports in the default exit policy.
36949 - MaxConn is now automatically set to the hard limit of max
36950 file descriptors we're allowed (ulimit -n), minus a few for
36952 - Give a clearer message when servers need to raise their
36953 ulimit -n when they start running out of file descriptors.
36954 - SGI Compatibility patches from Jan Schaumann.
36955 - Tolerate a corrupt cached directory better.
36956 - When a dirserver hasn't approved your server, list which one.
36957 - Go into soft hibernation after 95% of the bandwidth is used,
36958 not 99%. This is especially important for daily hibernators who
36959 have a small accounting max. Hopefully it will result in fewer
36960 cut connections when the hard hibernation starts.
36961 - Load-balance better when using servers that claim more than
36962 800kB/s of capacity.
36963 - Make NT services work (experimental, only used if compiled in).
36966 Changes in version 0.0.9.3 - 2005-01-21
36967 o Bugfixes on 0.0.9:
36968 - Backport the cpu use fixes from main branch, so busy servers won't
36969 need as much processor time.
36970 - Work better when we go offline and then come back, or when we
36971 run Tor at boot before the network is up. We do this by
36972 optimistically trying to fetch a new directory whenever an
36973 application request comes in and we think we're offline -- the
36974 human is hopefully a good measure of when the network is back.
36975 - Backport some minimal hidserv bugfixes: keep rend circuits open as
36976 long as you keep using them; actually publish hidserv descriptors
36977 shortly after they change, rather than waiting 20-40 minutes.
36978 - Enable Mac startup script by default.
36979 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
36980 - When you update AllowUnverifiedNodes or FirewallPorts via the
36981 controller's setconf feature, we were always appending, never
36983 - When you update HiddenServiceDir via setconf, it was screwing up
36984 the order of reading the lines, making it fail.
36985 - Do not rewrite a cached directory back to the cache; otherwise we
36986 will think it is recent and not fetch a newer one on startup.
36987 - Workaround for webservers that lie about Content-Encoding: Tor
36988 now tries to autodetect compressed directories and compression
36989 itself. This lets us Proxypass dir fetches through apache.
36992 Changes in version 0.0.9.2 - 2005-01-04
36993 o Bugfixes on 0.0.9 (crashes and asserts):
36994 - Fix an assert on startup when the disk is full and you're logging
36996 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
36997 style address, then we'd crash.
36998 - Fix an assert trigger when the running-routers string we get from
36999 a dirserver is broken.
37000 - Make worker threads start and run on win32. Now win32 servers
37002 - Bandaid (not actually fix, but now it doesn't crash) an assert
37003 where the dns worker dies mysteriously and the main Tor process
37004 doesn't remember anything about the address it was resolving.
37006 o Bugfixes on 0.0.9 (Win32):
37007 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
37008 name out of the warning/assert messages.
37009 - Fix a superficial "unhandled error on read" bug on win32.
37010 - The win32 installer no longer requires a click-through for our
37011 license, since our Free Software license grants rights but does not
37013 - Win32: When connecting to a dirserver fails, try another one
37014 immediately. (This was already working for non-win32 Tors.)
37015 - Stop trying to parse $HOME on win32 when hunting for default
37017 - Make tor-resolve.c work on win32 by calling network_init().
37019 o Bugfixes on 0.0.9 (other):
37020 - Make 0.0.9.x build on Solaris again.
37021 - Due to a fencepost error, we were blowing away the \n when reporting
37022 confvalue items in the controller. So asking for multiple config
37023 values at once couldn't work.
37024 - When listing circuits that are pending on an opening OR connection,
37025 if we're an OR we were listing circuits that *end* at us as
37026 being pending on every listener, dns/cpu worker, etc. Stop that.
37027 - Dirservers were failing to create 'running-routers' or 'directory'
37028 strings if we had more than some threshold of routers. Fix them so
37029 they can handle any number of routers.
37030 - Fix a superficial "Duplicate mark for close" bug.
37031 - Stop checking for clock skew for OR connections, even for servers.
37032 - Fix a fencepost error that was chopping off the last letter of any
37033 nickname that is the maximum allowed nickname length.
37034 - Update URLs in log messages so they point to the new website.
37035 - Fix a potential problem in mangling server private keys while
37036 writing to disk (not triggered yet, as far as we know).
37037 - Include the licenses for other free software we include in Tor,
37038 now that we're shipping binary distributions more regularly.
37041 Changes in version 0.0.9.1 - 2004-12-15
37042 o Bugfixes on 0.0.9:
37043 - Make hibernation actually work.
37044 - Make HashedControlPassword config option work.
37045 - When we're reporting event circuit status to a controller,
37046 don't use the stream status code.
37049 Changes in version 0.0.9 - 2004-12-12
37051 - Clean up manpage and torrc.sample file.
37052 - Clean up severities and text of log warnings.
37054 - Make servers trigger an assert when they enter hibernation.
37057 Changes in version 0.0.9rc7 - 2004-12-08
37058 o Bugfixes on 0.0.9rc:
37059 - Fix a stack-trashing crash when an exit node begins hibernating.
37060 - Avoid looking at unallocated memory while considering which
37061 ports we need to build circuits to cover.
37062 - Stop a sigpipe: when an 'end' cell races with eof from the app,
37063 we shouldn't hold-open-until-flush if the eof arrived first.
37064 - Fix a bug with init_cookie_authentication() in the controller.
37065 - When recommending new-format log lines, if the upper bound is
37066 LOG_ERR, leave it implicit.
37068 o Bugfixes on 0.0.8.1:
37069 - Fix a whole slew of memory leaks.
37070 - Fix isspace() and friends so they still make Solaris happy
37071 but also so they don't trigger asserts on win32.
37072 - Fix parse_iso_time on platforms without strptime (eg win32).
37073 - win32: tolerate extra "readable" events better.
37074 - win32: when being multithreaded, leave parent fdarray open.
37075 - Make unit tests work on win32.
37078 Changes in version 0.0.9rc6 - 2004-12-06
37079 o Bugfixes on 0.0.9pre:
37080 - Clean up some more integer underflow opportunities (not exploitable
37082 - While hibernating, hup should not regrow our listeners.
37083 - Send an end to the streams we close when we hibernate, rather
37084 than just chopping them off.
37085 - React to eof immediately on non-open edge connections.
37087 o Bugfixes on 0.0.8.1:
37088 - Calculate timeout for waiting for a connected cell from the time
37089 we sent the begin cell, not from the time the stream started. If
37090 it took a long time to establish the circuit, we would time out
37091 right after sending the begin cell.
37092 - Fix router_compare_addr_to_addr_policy: it was not treating a port
37093 of * as always matching, so we were picking reject *:* nodes as
37094 exit nodes too. Oops.
37097 - New circuit building strategy: keep a list of ports that we've
37098 used in the past 6 hours, and always try to have 2 circuits open
37099 or on the way that will handle each such port. Seed us with port
37100 80 so web users won't complain that Tor is "slow to start up".
37101 - Make kill -USR1 dump more useful stats about circuits.
37102 - When warning about retrying or giving up, print the address, so
37103 the user knows which one it's talking about.
37104 - If you haven't used a clean circuit in an hour, throw it away,
37105 just to be on the safe side. (This means after 6 hours a totally
37106 unused Tor client will have no circuits open.)
37109 Changes in version 0.0.9rc5 - 2004-12-01
37110 o Bugfixes on 0.0.8.1:
37111 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
37112 - Let resolve conns retry/expire also, rather than sticking around
37114 - If we are using select, make sure we stay within FD_SETSIZE.
37116 o Bugfixes on 0.0.9pre:
37117 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
37118 but doesn't seem to be currently; thanks to Ilja van Sprundel for
37120 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
37121 instead. Impose minima and maxima for all *Period options; impose
37122 even tighter maxima for fetching if we are a caching dirserver.
37123 Clip rather than rejecting.
37124 - Fetch cached running-routers from servers that serve it (that is,
37125 authdirservers and servers running 0.0.9rc5-cvs or later.)
37128 - Accept *:706 (silc) in default exit policy.
37129 - Implement new versioning format for post 0.1.
37130 - Support "foo.nickname.exit" addresses, to let Alice request the
37131 address "foo" as viewed by exit node "nickname". Based on a patch
37133 - Make tor --version --version dump the cvs Id of every file.
37136 Changes in version 0.0.9rc4 - 2004-11-28
37137 o Bugfixes on 0.0.8.1:
37138 - Make windows sockets actually non-blocking (oops), and handle
37139 win32 socket errors better.
37141 o Bugfixes on 0.0.9rc1:
37142 - Actually catch the -USR2 signal.
37145 Changes in version 0.0.9rc3 - 2004-11-25
37146 o Bugfixes on 0.0.8.1:
37147 - Flush the log file descriptor after we print "Tor opening log file",
37148 so we don't see those messages days later.
37150 o Bugfixes on 0.0.9rc1:
37151 - Make tor-resolve work again.
37152 - Avoid infinite loop in tor-resolve if tor hangs up on it.
37153 - Fix an assert trigger for clients/servers handling resolves.
37156 Changes in version 0.0.9rc2 - 2004-11-24
37157 o Bugfixes on 0.0.9rc1:
37158 - I broke socks5 support while fixing the eof bug.
37159 - Allow unitless bandwidths and intervals; they default to bytes
37161 - New servers don't start out hibernating; they are active until
37162 they run out of bytes, so they have a better estimate of how
37163 long it takes, and so their operators can know they're working.
37166 Changes in version 0.0.9rc1 - 2004-11-23
37167 o Bugfixes on 0.0.8.1:
37168 - Finally fix a bug that's been plaguing us for a year:
37169 With high load, circuit package window was reaching 0. Whenever
37170 we got a circuit-level sendme, we were reading a lot on each
37171 socket, but only writing out a bit. So we would eventually reach
37172 eof. This would be noticed and acted on even when there were still
37173 bytes sitting in the inbuf.
37174 - When poll() is interrupted, we shouldn't believe the revents values.
37176 o Bugfixes on 0.0.9pre6:
37177 - Fix hibernate bug that caused pre6 to be broken.
37178 - Don't keep rephist info for routers that haven't had activity for
37179 24 hours. (This matters now that clients have keys, since we track
37181 - Never call close_temp_logs while validating log options.
37182 - Fix backslash-escaping on tor.sh.in and torctl.in.
37185 - Implement weekly/monthly/daily accounting: now you specify your
37186 hibernation properties by
37187 AccountingMax N bytes|KB|MB|GB|TB
37188 AccountingStart day|week|month [day] HH:MM
37189 Defaults to "month 1 0:00".
37190 - Let bandwidth and interval config options be specified as 5 bytes,
37191 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
37192 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
37193 get back to normal.)
37194 - If your requested entry or exit node has advertised bandwidth 0,
37196 - Be more greedy about filling up relay cells -- we try reading again
37197 once we've processed the stuff we read, in case enough has arrived
37198 to fill the last cell completely.
37199 - Apply NT service patch from Osamu Fujino. Still needs more work.
37202 Changes in version 0.0.9pre6 - 2004-11-15
37203 o Bugfixes on 0.0.8.1:
37204 - Fix assert failure on malformed socks4a requests.
37205 - Use identity comparison, not nickname comparison, to choose which
37206 half of circuit-ID-space each side gets to use. This is needed
37207 because sometimes we think of a router as a nickname, and sometimes
37208 as a hex ID, and we can't predict what the other side will do.
37209 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
37210 write() call will fail and we handle it there.
37211 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
37212 and smartlist_len, which are two major profiling offenders.
37214 o Bugfixes on 0.0.9pre5:
37215 - Fix a bug in read_all that was corrupting config files on windows.
37216 - When we're raising the max number of open file descriptors to
37217 'unlimited', don't log that we just raised it to '-1'.
37218 - Include event code with events, as required by control-spec.txt.
37219 - Don't give a fingerprint when clients do --list-fingerprint:
37220 it's misleading, because it will never be the same again.
37221 - Stop using strlcpy in tor_strndup, since it was slowing us
37223 - Remove warn on startup about missing cached-directory file.
37224 - Make kill -USR1 work again.
37225 - Hibernate if we start tor during the "wait for wakeup-time" phase
37226 of an accounting interval. Log our hibernation plans better.
37227 - Authoritative dirservers now also cache their directory, so they
37228 have it on start-up.
37231 - Fetch running-routers; cache running-routers; compress
37232 running-routers; serve compressed running-routers.z
37233 - Add NSI installer script contributed by J Doe.
37234 - Commit VC6 and VC7 workspace/project files.
37235 - Commit a tor.spec for making RPM files, with help from jbash.
37236 - Add contrib/torctl.in contributed by Glenn Fink.
37237 - Implement the control-spec's SAVECONF command, to write your
37238 configuration to torrc.
37239 - Get cookie authentication for the controller closer to working.
37240 - Include control-spec.txt in the tarball.
37241 - When set_conf changes our server descriptor, upload a new copy.
37242 But don't upload it too often if there are frequent changes.
37243 - Document authentication config in man page, and document signals
37245 - Clean up confusing parts of man page and torrc.sample.
37246 - Make expand_filename handle ~ and ~username.
37247 - Use autoconf to enable largefile support where necessary. Use
37248 ftello where available, since ftell can fail at 2GB.
37249 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
37250 log more informatively.
37251 - Give a slightly more useful output for "tor -h".
37252 - Refuse application socks connections to port 0.
37253 - Check clock skew for verified servers, but allow unverified
37254 servers and clients to have any clock skew.
37255 - Break DirFetchPostPeriod into:
37256 - DirFetchPeriod for fetching full directory,
37257 - StatusFetchPeriod for fetching running-routers,
37258 - DirPostPeriod for posting server descriptor,
37259 - RendPostPeriod for posting hidden service descriptors.
37260 - Make sure the hidden service descriptors are at a random offset
37261 from each other, to hinder linkability.
37264 Changes in version 0.0.9pre5 - 2004-11-09
37265 o Bugfixes on 0.0.9pre4:
37266 - Fix a seg fault in unit tests (doesn't affect main program).
37267 - Fix an assert bug where a hidden service provider would fail if
37268 the first hop of his rendezvous circuit was down.
37269 - Hidden service operators now correctly handle version 1 style
37270 INTRODUCE1 cells (nobody generates them still, so not a critical
37272 - If do_hup fails, actually notice.
37273 - Handle more errnos from accept() without closing the listener.
37274 Some OpenBSD machines were closing their listeners because
37275 they ran out of file descriptors.
37276 - Send resolve cells to exit routers that are running a new
37277 enough version of the resolve code to work right.
37278 - Better handling of winsock includes on non-MSV win32 compilers.
37279 - Some people had wrapped their tor client/server in a script
37280 that would restart it whenever it died. This did not play well
37281 with our "shut down if your version is obsolete" code. Now people
37282 don't fetch a new directory if their local cached version is
37284 - Make our autogen.sh work on ksh as well as bash.
37287 - Hibernation: New config option "AccountingMaxKB" lets you
37288 set how many KBytes per month you want to allow your server to
37289 consume. Rather than spreading those bytes out evenly over the
37290 month, we instead hibernate for some of the month and pop up
37291 at a deterministic time, work until the bytes are consumed, then
37292 hibernate again. Config option "MonthlyAccountingStart" lets you
37293 specify which day of the month your billing cycle starts on.
37294 - Control interface: a separate program can now talk to your
37295 client/server over a socket, and get/set config options, receive
37296 notifications of circuits and streams starting/finishing/dying,
37297 bandwidth used, etc. The next step is to get some GUIs working.
37298 Let us know if you want to help out. See doc/control-spec.txt .
37299 - Ship a contrib/tor-control.py as an example script to interact
37300 with the control port.
37301 - "tor --hash-password zzyxz" will output a salted password for
37302 use in authenticating to the control interface.
37303 - New log format in config:
37304 "Log minsev[-maxsev] stdout|stderr|syslog" or
37305 "Log minsev[-maxsev] file /var/foo"
37308 - DirPolicy config option, to let people reject incoming addresses
37309 from their dirserver.
37310 - "tor --list-fingerprint" will list your identity key fingerprint
37312 - Add "pass" target for RedirectExit, to make it easier to break
37313 out of a sequence of RedirectExit rules.
37314 - Clients now generate a TLS cert too, in preparation for having
37315 them act more like real nodes.
37316 - Ship src/win32/ in the tarball, so people can use it to build.
37317 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
37319 - New "router-status" line in directory, to better bind each verified
37320 nickname to its identity key.
37321 - Deprecate unofficial config option abbreviations, and abbreviations
37322 not on the command line.
37323 - Add a pure-C tor-resolve implementation.
37324 - Use getrlimit and friends to ensure we can reach MaxConn (currently
37325 1024) file descriptors.
37327 o Code security improvements, inspired by Ilja:
37328 - Replace sprintf with snprintf. (I think they were all safe, but
37330 - Replace strcpy/strncpy with strlcpy in more places.
37331 - Avoid strcat; use snprintf or strlcat instead.
37332 - snprintf wrapper with consistent (though not C99) overflow behavior.
37335 Changes in version 0.0.9pre4 - 2004-10-17
37336 o Bugfixes on 0.0.9pre3:
37337 - If the server doesn't specify an exit policy, use the real default
37338 exit policy, not reject *:*.
37339 - Ignore fascistfirewall when uploading/downloading hidden service
37340 descriptors, since we go through Tor for those; and when using
37341 an HttpProxy, since we assume it can reach them all.
37342 - When looking for an authoritative dirserver, use only the ones
37343 configured at boot. Don't bother looking in the directory.
37344 - The rest of the fix for get_default_conf_file() on older win32.
37345 - Make 'Routerfile' config option obsolete.
37348 - New 'MyFamily nick1,...' config option for a server to
37349 specify other servers that shouldn't be used in the same circuit
37350 with it. Only believed if nick1 also specifies us.
37351 - New 'NodeFamily nick1,nick2,...' config option for a client to
37352 specify nodes that it doesn't want to use in the same circuit.
37353 - New 'Redirectexit pattern address:port' config option for a
37354 server to redirect exit connections, e.g. to a local squid.
37357 Changes in version 0.0.9pre3 - 2004-10-13
37358 o Bugfixes on 0.0.8.1:
37359 - Better torrc example lines for dirbindaddress and orbindaddress.
37360 - Improved bounds checking on parsed ints (e.g. config options and
37361 the ones we find in directories.)
37362 - Better handling of size_t vs int, so we're more robust on 64
37364 - Fix the rest of the bug where a newly started OR would appear
37365 as unverified even after we've added his fingerprint and hupped
37367 - Fix a bug from 0.0.7: when read() failed on a stream, we would
37368 close it without sending back an end. So 'connection refused'
37369 would simply be ignored and the user would get no response.
37371 o Bugfixes on 0.0.9pre2:
37372 - Serving the cached-on-disk directory to people is bad. We now
37373 provide no directory until we've fetched a fresh one.
37374 - Workaround for bug on windows where cached-directories get crlf
37376 - Make get_default_conf_file() work on older windows too.
37377 - If we write a *:* exit policy line in the descriptor, don't write
37378 any more exit policy lines.
37381 - Use only 0.0.9pre1 and later servers for resolve cells.
37382 - Make the dirservers file obsolete.
37383 - Include a dir-signing-key token in directories to tell the
37384 parsing entity which key is being used to sign.
37385 - Remove the built-in bulky default dirservers string.
37386 - New config option "Dirserver %s:%d [fingerprint]", which can be
37387 repeated as many times as needed. If no dirservers specified,
37388 default to moria1,moria2,tor26.
37389 - Make moria2 advertise a dirport of 80, so people behind firewalls
37390 will be able to get a directory.
37391 - Http proxy support
37392 - Dirservers translate requests for http://%s:%d/x to /x
37393 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
37394 be routed through this host.
37395 - Clients ask for /tor/x rather than /x for new enough dirservers.
37396 This way we can one day coexist peacefully with apache.
37397 - Clients specify a "Host: %s%d" http header, to be compatible
37398 with more proxies, and so running squid on an exit node can work.
37401 Changes in version 0.0.8.1 - 2004-10-13
37403 - Fix a seg fault that can be triggered remotely for Tor
37404 clients/servers with an open dirport.
37405 - Fix a rare assert trigger, where routerinfos for entries in
37406 our cpath would expire while we're building the path.
37407 - Fix a bug in OutboundBindAddress so it (hopefully) works.
37408 - Fix a rare seg fault for people running hidden services on
37409 intermittent connections.
37410 - Fix a bug in parsing opt keywords with objects.
37411 - Fix a stale pointer assert bug when a stream detaches and
37413 - Fix a string format vulnerability (probably not exploitable)
37414 in reporting stats locally.
37415 - Fix an assert trigger: sometimes launching circuits can fail
37416 immediately, e.g. because too many circuits have failed recently.
37417 - Fix a compile warning on 64 bit platforms.
37420 Changes in version 0.0.9pre2 - 2004-10-03
37422 - Make fetching a cached directory work for 64-bit platforms too.
37423 - Make zlib.h a required header, not an optional header.
37426 Changes in version 0.0.9pre1 - 2004-10-01
37428 - Stop using separate defaults for no-config-file and
37429 empty-config-file. Now you have to explicitly turn off SocksPort,
37430 if you don't want it open.
37431 - Fix a bug in OutboundBindAddress so it (hopefully) works.
37432 - Improve man page to mention more of the 0.0.8 features.
37433 - Fix a rare seg fault for people running hidden services on
37434 intermittent connections.
37435 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
37437 - Fix more dns related bugs: send back resolve_failed and end cells
37438 more reliably when the resolve fails, rather than closing the
37439 circuit and then trying to send the cell. Also attach dummy resolve
37440 connections to a circuit *before* calling dns_resolve(), to fix
37441 a bug where cached answers would never be sent in RESOLVED cells.
37442 - When we run out of disk space, or other log writing error, don't
37443 crash. Just stop logging to that log and continue.
37444 - We were starting to daemonize before we opened our logs, so if
37445 there were any problems opening logs, we would complain to stderr,
37446 which wouldn't work, and then mysteriously exit.
37447 - Fix a rare bug where sometimes a verified OR would connect to us
37448 before he'd uploaded his descriptor, which would cause us to
37449 assign conn->nickname as though he's unverified. Now we look through
37450 the fingerprint list to see if he's there.
37451 - Fix a rare assert trigger, where routerinfos for entries in
37452 our cpath would expire while we're building the path.
37455 - Clients can ask dirservers for /dir.z to get a compressed version
37456 of the directory. Only works for servers running 0.0.9, of course.
37457 - Make clients cache directories and use them to seed their router
37458 lists at startup. This means clients have a datadir again.
37459 - Configuration infrastructure support for warning on obsolete
37461 - Respond to content-encoding headers by trying to uncompress as
37463 - Reply with a deflated directory when a client asks for "dir.z".
37464 We could use allow-encodings instead, but allow-encodings isn't
37465 specified in HTTP 1.0.
37466 - Raise the max dns workers from 50 to 100.
37467 - Discourage people from setting their dirfetchpostperiod more often
37468 than once per minute.
37469 - Protect dirservers from overzealous descriptor uploading -- wait
37470 10 seconds after directory gets dirty, before regenerating.
37473 Changes in version 0.0.8 - 2004-08-25
37474 o Port it to SunOS 5.9 / Athena
37477 Changes in version 0.0.8rc2 - 2004-08-20
37478 o Make it compile on cygwin again.
37479 o When picking unverified routers, skip those with low uptime and/or
37480 low bandwidth, depending on what properties you care about.
37483 Changes in version 0.0.8rc1 - 2004-08-18
37484 o Changes from 0.0.7.3:
37486 - Fix assert triggers: if the other side returns an address 0.0.0.0,
37487 don't put it into the client dns cache.
37488 - If a begin failed due to exit policy, but we believe the IP address
37489 should have been allowed, switch that router to exitpolicy reject *:*
37490 until we get our next directory.
37492 - Clients choose nodes proportional to advertised bandwidth.
37493 - Avoid using nodes with low uptime as introduction points.
37494 - Handle servers with dynamic IP addresses: don't replace
37495 options->Address with the resolved one at startup, and
37496 detect our address right before we make a routerinfo each time.
37497 - 'FascistFirewall' option to pick dirservers and ORs on specific
37498 ports; plus 'FirewallPorts' config option to tell FascistFirewall
37499 which ports are open. (Defaults to 80,443)
37500 - Be more aggressive about trying to make circuits when the network
37501 has changed (e.g. when you unsuspend your laptop).
37502 - Check for time skew on http headers; report date in response to
37504 - If the entrynode config line has only one node, don't pick it as
37506 - Add strict{entry|exit}nodes config options. If set to 1, then
37507 we refuse to build circuits that don't include the specified entry
37509 - OutboundBindAddress config option, to bind to a specific
37510 IP address for outgoing connect()s.
37511 - End truncated log entries (e.g. directories) with "[truncated]".
37513 o Patches to 0.0.8preX:
37515 - Patches to compile and run on win32 again (maybe)?
37516 - Fix crash when looking for ~/.torrc with no $HOME set.
37517 - Fix a race bug in the unit tests.
37518 - Handle verified/unverified name collisions better when new
37519 routerinfo's arrive in a directory.
37520 - Sometimes routers were getting entered into the stats before
37521 we'd assigned their identity_digest. Oops.
37522 - Only pick and establish intro points after we've gotten a
37525 - AllowUnverifiedNodes config option to let circuits choose no-name
37526 routers in entry,middle,exit,introduction,rendezvous positions.
37527 Allow middle and rendezvous positions by default.
37528 - Add a man page for tor-resolve.
37531 Changes in version 0.0.7.3 - 2004-08-12
37532 o Stop dnsworkers from triggering an assert failure when you
37533 ask them to resolve the host "".
37536 Changes in version 0.0.8pre3 - 2004-08-09
37537 o Changes from 0.0.7.2:
37538 - Allow multiple ORs with same nickname in routerlist -- now when
37539 people give us one identity key for a nickname, then later
37540 another, we don't constantly complain until the first expires.
37541 - Remember used bandwidth (both in and out), and publish 15-minute
37542 snapshots for the past day into our descriptor.
37543 - You can now fetch $DIRURL/running-routers to get just the
37544 running-routers line, not the whole descriptor list. (But
37545 clients don't use this yet.)
37546 - When people mistakenly use Tor as an http proxy, point them
37547 at the tor-doc.html rather than the INSTALL.
37548 - Remove our mostly unused -- and broken -- hex_encode()
37549 function. Use base16_encode() instead. (Thanks to Timo Lindfors
37550 for pointing out this bug.)
37551 - Rotate onion keys every 12 hours, not every 2 hours, so we have
37552 fewer problems with people using the wrong key.
37553 - Change the default exit policy to reject the default edonkey,
37554 kazaa, gnutella ports.
37555 - Add replace_file() to util.[ch] to handle win32's rename().
37557 o Changes from 0.0.8preX:
37558 - Fix two bugs in saving onion keys to disk when rotating, so
37559 hopefully we'll get fewer people using old onion keys.
37560 - Fix an assert error that was making SocksPolicy not work.
37561 - Be willing to expire routers that have an open dirport -- it's
37562 just the authoritative dirservers we want to not forget.
37563 - Reject tor-resolve requests for .onion addresses early, so we
37564 don't build a whole rendezvous circuit and then fail.
37565 - When you're warning a server that he's unverified, don't cry
37566 wolf unpredictably.
37567 - Fix a race condition: don't try to extend onto a connection
37568 that's still handshaking.
37569 - For servers in clique mode, require the conn to be open before
37570 you'll choose it for your path.
37571 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
37572 end relay cell, etc.
37573 - Measure bandwidth capacity over the last 24 hours, not just 12
37574 - Bugfix: authoritative dirservers were making and signing a new
37575 directory for each client, rather than reusing the cached one.
37578 Changes in version 0.0.8pre2 - 2004-08-04
37579 o Changes from 0.0.7.2:
37581 - Check directory signature _before_ you decide whether you're
37582 you're running an obsolete version and should exit.
37583 - Check directory signature _before_ you parse the running-routers
37584 list to decide who's running or verified.
37585 - Bugfixes and features:
37586 - Check return value of fclose while writing to disk, so we don't
37587 end up with broken files when servers run out of disk space.
37588 - Log a warning if the user uses an unsafe socks variant, so people
37589 are more likely to learn about privoxy or socat.
37590 - Dirservers now include RFC1123-style dates in the HTTP headers,
37591 which one day we will use to better detect clock skew.
37593 o Changes from 0.0.8pre1:
37594 - Make it compile without warnings again on win32.
37595 - Log a warning if you're running an unverified server, to let you
37596 know you might want to get it verified.
37597 - Only pick a default nickname if you plan to be a server.
37600 Changes in version 0.0.8pre1 - 2004-07-23
37602 - Made our unit tests compile again on OpenBSD 3.5, and tor
37603 itself compile again on OpenBSD on a sparc64.
37604 - We were neglecting milliseconds when logging on win32, so
37605 everything appeared to happen at the beginning of each second.
37607 o Protocol changes:
37608 - 'Extend' relay cell payloads now include the digest of the
37609 intended next hop's identity key. Now we can verify that we're
37610 extending to the right router, and also extend to routers we
37611 hadn't heard of before.
37614 - Tor nodes can now act as relays (with an advertised ORPort)
37615 without being manually verified by the dirserver operators.
37616 - Uploaded descriptors of unverified routers are now accepted
37617 by the dirservers, and included in the directory.
37618 - Verified routers are listed by nickname in the running-routers
37619 list; unverified routers are listed as "$<fingerprint>".
37620 - We now use hash-of-identity-key in most places rather than
37621 nickname or addr:port, for improved security/flexibility.
37622 - To avoid Sybil attacks, paths still use only verified servers.
37623 But now we have a chance to play around with hybrid approaches.
37624 - Nodes track bandwidth usage to estimate capacity (not used yet).
37625 - ClientOnly option for nodes that never want to become servers.
37626 - Directory caching.
37627 - "AuthoritativeDir 1" option for the official dirservers.
37628 - Now other nodes (clients and servers) will cache the latest
37629 directory they've pulled down.
37630 - They can enable their DirPort to serve it to others.
37631 - Clients will pull down a directory from any node with an open
37632 DirPort, and check the signature/timestamp correctly.
37633 - Authoritative dirservers now fetch directories from other
37634 authdirservers, to stay better synced.
37635 - Running-routers list tells who's down also, along with noting
37636 if they're verified (listed by nickname) or unverified (listed
37638 - Allow dirservers to serve running-router list separately.
37639 This isn't used yet.
37640 - ORs connect-on-demand to other ORs
37641 - If you get an extend cell to an OR you're not connected to,
37642 connect, handshake, and forward the create cell.
37643 - The authoritative dirservers stay connected to everybody,
37644 and everybody stays connected to 0.0.7 servers, but otherwise
37645 clients/servers expire unused connections after 5 minutes.
37646 - When servers get a sigint, they delay 30 seconds (refusing new
37647 connections) then exit. A second sigint causes immediate exit.
37648 - File and name management:
37649 - Look for .torrc if no CONFDIR "torrc" is found.
37650 - If no datadir is defined, then choose, make, and secure ~/.tor
37652 - If torrc not found, exitpolicy reject *:*.
37653 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
37654 - If no nickname is defined, derive default from hostname.
37655 - Rename secret key files, e.g. identity.key -> secret_id_key,
37656 to discourage people from mailing their identity key to tor-ops.
37657 - Refuse to build a circuit before the directory has arrived --
37658 it won't work anyway, since you won't know the right onion keys
37660 - Try other dirservers immediately if the one you try is down. This
37661 should tolerate down dirservers better now.
37662 - Parse tor version numbers so we can do an is-newer-than check
37663 rather than an is-in-the-list check.
37664 - New socks command 'resolve', to let us shim gethostbyname()
37666 - A 'tor_resolve' script to access the socks resolve functionality.
37667 - A new socks-extensions.txt doc file to describe our
37668 interpretation and extensions to the socks protocols.
37669 - Add a ContactInfo option, which gets published in descriptor.
37670 - Publish OR uptime in descriptor (and thus in directory) too.
37671 - Write tor version at the top of each log file
37672 - New docs in the tarball:
37674 - Document that you should proxy your SSL traffic too.
37677 Changes in version 0.0.7.2 - 2004-07-07
37678 o A better fix for the 0.0.0.0 problem, that will hopefully
37679 eliminate the remaining related assertion failures.
37682 Changes in version 0.0.7.1 - 2004-07-04
37683 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
37684 since internally we use 0.0.0.0 to signify "not yet resolved".
37687 Changes in version 0.0.7 - 2004-06-07
37688 o Updated the man page to reflect the new features.
37691 Changes in version 0.0.7rc2 - 2004-06-06
37692 o Changes from 0.0.7rc1:
37693 - Make it build on Win32 again.
37694 o Changes from 0.0.6.2:
37695 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
37699 Changes in version 0.0.7rc1 - 2004-06-02
37701 - On sighup, we were adding another log without removing the first
37702 one. So log messages would get duplicated n times for n sighups.
37703 - Several cases of using a connection after we'd freed it. The
37704 problem was that connections that are pending resolve are in both
37705 the pending_resolve tree, and also the circuit's resolving_streams
37706 list. When you want to remove one, you must remove it from both.
37707 - Fix a double-mark-for-close where an end cell arrived for a
37708 resolving stream, and then the resolve failed.
37709 - Check directory signatures based on name of signer, not on whom
37710 we got the directory from. This will let us cache directories more
37713 - Crank up some of our constants to handle more users.
37716 Changes in version 0.0.7pre1 - 2004-06-02
37717 o Fixes for crashes and other obnoxious bugs:
37718 - Fix an epipe bug: sometimes when directory connections failed
37719 to connect, we would give them a chance to flush before closing
37721 - When we detached from a circuit because of resolvefailed, we
37722 would immediately try the same circuit twice more, and then
37723 give up on the resolve thinking we'd tried three different
37725 - Limit the number of intro circuits we'll attempt to build for a
37726 hidden service per 15-minute period.
37727 - Check recommended-software string *early*, before actually parsing
37728 the directory. Thus we can detect an obsolete version and exit,
37729 even if the new directory format doesn't parse.
37730 o Fixes for security bugs:
37731 - Remember which nodes are dirservers when you startup, and if a
37732 random OR enables his dirport, don't automatically assume he's
37733 a trusted dirserver.
37735 - Directory connections were asking the wrong poll socket to
37736 start writing, and not asking themselves to start writing.
37737 - When we detached from a circuit because we sent a begin but
37738 didn't get a connected, we would use it again the first time;
37739 but after that we would correctly switch to a different one.
37740 - Stop warning when the first onion decrypt attempt fails; they
37741 will sometimes legitimately fail now that we rotate keys.
37742 - Override unaligned-access-ok check when $host_cpu is ia64 or
37743 arm. Apparently they allow it but the kernel whines.
37744 - Dirservers try to reconnect periodically too, in case connections
37746 - Fix some memory leaks in directory servers.
37747 - Allow backslash in Win32 filenames.
37748 - Made Tor build complain-free on FreeBSD, hopefully without
37749 breaking other BSD builds. We'll see.
37751 - Doxygen markup on all functions and global variables.
37752 - Make directory functions update routerlist, not replace it. So
37753 now directory disagreements are not so critical a problem.
37754 - Remove the upper limit on number of descriptors in a dirserver's
37755 directory (not that we were anywhere close).
37756 - Allow multiple logfiles at different severity ranges.
37757 - Allow *BindAddress to specify ":port" rather than setting *Port
37758 separately. Allow multiple instances of each BindAddress config
37759 option, so you can bind to multiple interfaces if you want.
37760 - Allow multiple exit policy lines, which are processed in order.
37761 Now we don't need that huge line with all the commas in it.
37762 - Enable accept/reject policies on SOCKS connections, so you can bind
37763 to 0.0.0.0 but still control who can use your OP.
37766 Changes in version 0.0.6.2 - 2004-05-16
37767 o Our integrity-checking digest was checking only the most recent cell,
37768 not the previous cells like we'd thought.
37769 Thanks to Stefan Mark for finding the flaw!
37772 Changes in version 0.0.6.1 - 2004-05-06
37773 o Fix two bugs in our AES counter-mode implementation (this affected
37774 onion-level stream encryption, but not TLS-level). It turns
37775 out we were doing something much more akin to a 16-character
37776 polyalphabetic cipher. Oops.
37777 Thanks to Stefan Mark for finding the flaw!
37778 o Retire moria3 as a directory server, and add tor26 as a directory
37782 Changes in version 0.0.6 - 2004-05-02
37783 [version bump only]
37786 Changes in version 0.0.6rc4 - 2004-05-01
37787 o Update the built-in dirservers list to use the new directory format
37788 o Fix a rare seg fault: if a node offering a hidden service attempts
37789 to build a circuit to Alice's rendezvous point and fails before it
37790 reaches the last hop, it retries with a different circuit, but
37792 o Handle windows socket errors correctly.
37795 Changes in version 0.0.6rc3 - 2004-04-28
37796 o Don't expire non-general excess circuits (if we had enough
37797 circuits open, we were expiring rendezvous circuits -- even
37798 when they had a stream attached. oops.)
37799 o Fetch randomness from /dev/urandom better (not via fopen/fread)
37800 o Better debugging for tls errors
37801 o Some versions of openssl have an SSL_pending function that erroneously
37802 returns bytes when there is a non-application record pending.
37803 o Set Content-Type on the directory and hidserv descriptor.
37804 o Remove IVs from cipher code, since AES-ctr has none.
37805 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
37806 o We were using an array of length zero in a few places.
37807 o win32's gethostbyname can't resolve an IP to an IP.
37808 o win32's close can't close a socket.
37811 Changes in version 0.0.6rc2 - 2004-04-26
37812 o Fix a bug where we were closing tls connections intermittently.
37813 It turns out openssl keeps its errors around -- so if an error
37814 happens, and you don't ask about it, and then another openssl
37815 operation happens and succeeds, and you ask if there was an error,
37816 it tells you about the first error. Fun fun.
37817 o Fix a bug that's been lurking since 27 may 03 (!)
37818 When passing back a destroy cell, we would use the wrong circ id.
37819 'Mostly harmless', but still worth fixing.
37820 o Since we don't support truncateds much, don't bother sending them;
37821 just close the circ.
37822 o check for <machine/limits.h> so we build on NetBSD again (I hope).
37823 o don't crash if a conn that sent a begin has suddenly lost its circuit
37824 (this was quite rare).
37827 Changes in version 0.0.6rc1 - 2004-04-25
37828 o We now rotate link (tls context) keys and onion keys.
37829 o CREATE cells now include oaep padding, so you can tell
37830 if you decrypted them correctly.
37831 o Add bandwidthburst to server descriptor.
37832 o Directories now say which dirserver signed them.
37833 o Use a tor_assert macro that logs failed assertions too.
37836 Changes in version 0.0.6pre5 - 2004-04-18
37837 o changes from 0.0.6pre4:
37838 - make tor build on broken freebsd 5.2 installs
37839 - fix a failed assert when you try an intro point, get a nack, and try
37840 a second one and it works.
37841 - when alice uses a port that the hidden service doesn't accept,
37842 it now sends back an end cell (denied by exit policy). otherwise
37843 alice would just have to wait to time out.
37844 - fix another rare bug: when we had tried all the intro
37845 points for a hidden service, we fetched the descriptor
37846 again, but we left our introcirc thinking it had already
37847 sent an intro, so it kept waiting for a response...
37848 - bugfix: when you sleep your hidden-service laptop, as soon
37849 as it wakes up it tries to upload a service descriptor, but
37850 socketpair fails for some reason (localhost not up yet?).
37851 now we simply give up on that upload, and we'll try again later.
37852 i'd still like to find the bug though.
37853 - if an intro circ waiting for an ack dies before getting one, then
37855 - we were reusing stale service descriptors and refetching usable
37859 Changes in version 0.0.6pre4 - 2004-04-14
37860 o changes from 0.0.6pre3:
37861 - when bob fails to connect to the rendezvous point, and his
37862 circ didn't fail because of the rendezvous point itself, then
37863 he retries a couple of times
37864 - we expire introduction and rendezvous circs more thoroughly
37865 (sometimes they were hanging around forever)
37866 - we expire unattached rendezvous streams that have been around
37867 too long (they were sticking around forever).
37868 - fix a measly fencepost error that was crashing everybody with
37872 Changes in version 0.0.6pre3 - 2004-04-14
37873 o changes from 0.0.6pre2:
37874 - make hup work again
37875 - fix some memory leaks for dirservers
37876 - allow more skew in rendezvous descriptor timestamps, to help
37877 handle people like blanu who don't know what time it is
37878 - normal circs are 3 hops, but some rend/intro circs are 4, if
37879 the initiator doesn't get to choose the last hop
37880 - send acks for introductions, so alice can know whether to try
37882 - bob publishes intro points more correctly
37883 o changes from 0.0.5:
37884 - fix an assert trigger that's been plaguing us since the days
37885 of 0.0.2prexx (thanks weasel!)
37886 - retry stream correctly when we fail to connect because of
37887 exit-policy-reject (should try another) or can't-resolve-address
37888 (also should try another, because dns on random internet servers
37890 - when we hup a dirserver and we've *removed* a server from the
37891 approved-routers list, now we remove that server from the
37892 in-memory directories too
37895 Changes in version 0.0.6pre2 - 2004-04-08
37896 o We fixed our base32 implementation. Now it works on all architectures.
37899 Changes in version 0.0.6pre1 - 2004-04-08
37901 - Hidden services and rendezvous points are implemented. Go to
37902 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
37903 hidden services. (This only works via a socks4a proxy such as
37904 Privoxy, and currently it's quite slow.)
37907 Changes in version 0.0.5 - 2004-03-30
37908 [version bump only]
37911 Changes in version 0.0.5rc3 - 2004-03-29
37912 o Install torrc as torrc.sample -- we no longer clobber your
37914 o Re-enable recommendedversion checking (we broke it in rc2, oops)
37915 o Add in a 'notice' log level for things the operator should hear
37916 but that aren't warnings
37919 Changes in version 0.0.5rc2 - 2004-03-29
37920 o Hold socks connection open until reply is flushed (if possible)
37921 o Make exit nodes resolve IPs to IPs immediately, rather than asking
37922 the dns farm to do it.
37923 o Fix c99 aliasing warnings in rephist.c
37924 o Don't include server descriptors that are older than 24 hours in the
37926 o Give socks 'reject' replies their whole 15s to attempt to flush,
37927 rather than seeing the 60s timeout and assuming the flush had failed.
37928 o Clean automake droppings from the cvs repository
37931 Changes in version 0.0.5rc1 - 2004-03-28
37932 o Fix mangled-state bug in directory fetching (was causing sigpipes).
37933 o Only build circuits after we've fetched the directory: clients were
37934 using only the directory servers before they'd fetched a directory.
37935 This also means longer startup time; so it goes.
37936 o Fix an assert trigger where an OP would fail to handshake, and we'd
37937 expect it to have a nickname.
37938 o Work around a tsocks bug: do a socks reject when AP connection dies
37939 early, else tsocks goes into an infinite loop.
37942 Changes in version 0.0.4 - 2004-03-26
37943 o When connecting to a dirserver or OR and the network is down,
37947 Changes in version 0.0.3 - 2004-03-26
37948 o Warn and fail if server chose a nickname with illegal characters
37949 o Port to Solaris and Sparc:
37950 - include missing header fcntl.h
37951 - have autoconf find -lsocket -lnsl automatically
37952 - deal with hardware word alignment
37953 - make uname() work (solaris has a different return convention)
37954 - switch from using signal() to sigaction()
37955 o Preliminary work on reputation system:
37956 - Keep statistics on success/fail of connect attempts; they're published
37957 by kill -USR1 currently.
37958 - Add a RunTesting option to try to learn link state by creating test
37959 circuits, even when SocksPort is off.
37960 - Remove unused open circuits when there are too many.
37963 Changes in version 0.0.2 - 2004-03-19
37964 - Include strlcpy and strlcat for safer string ops
37965 - define INADDR_NONE so we compile (but still not run) on solaris
37968 Changes in version 0.0.2pre27 - 2004-03-14
37970 - Allow internal tor networks (we were rejecting internal IPs,
37971 now we allow them if they're set explicitly).
37972 - And fix a few endian issues.
37975 Changes in version 0.0.2pre26 - 2004-03-14
37977 - If a stream times out after 15s without a connected cell, don't
37978 try that circuit again: try a new one.
37979 - Retry streams at most 4 times. Then give up.
37980 - When a dirserver gets a descriptor from an unknown router, it
37981 logs its fingerprint (so the dirserver operator can choose to
37982 accept it even without mail from the server operator).
37983 - Inform unapproved servers when we reject their descriptors.
37984 - Make tor build on Windows again. It works as a client, who knows
37986 - Clearer instructions in the torrc for how to set up a server.
37987 - Be more efficient about reading fd's when our global token bucket
37988 (used for rate limiting) becomes empty.
37990 - Stop asserting that computers always go forward in time. It's
37992 - When we sent a cell (e.g. destroy) and then marked an OR connection
37993 expired, we might close it before finishing a flush if the other
37994 side isn't reading right then.
37995 - Don't allow dirservers to start if they haven't defined
37996 RecommendedVersions
37997 - We were caching transient dns failures. Oops.
37998 - Prevent servers from publishing an internal IP as their address.
37999 - Address a strcat vulnerability in circuit.c
38002 Changes in version 0.0.2pre25 - 2004-03-04
38004 - Put the OR's IP in its router descriptor, not its fqdn. That way
38005 we'll stop being stalled by gethostbyname for nodes with flaky dns,
38008 - If the user typed in an address that didn't resolve, the server
38012 Changes in version 0.0.2pre24 - 2004-03-03
38014 - Fix an assertion failure in dns.c, where we were trying to dequeue
38015 a pending dns resolve even if it wasn't pending
38016 - Fix a spurious socks5 warning about still trying to write after the
38017 connection is finished.
38018 - Hold certain marked_for_close connections open until they're finished
38019 flushing, rather than losing bytes by closing them too early.
38020 - Correctly report the reason for ending a stream
38021 - Remove some duplicate calls to connection_mark_for_close
38022 - Put switch_id and start_daemon earlier in the boot sequence, so it
38023 will actually try to chdir() to options.DataDirectory
38024 - Make 'make test' exit(1) if a test fails; fix some unit tests
38025 - Make tor fail when you use a config option it doesn't know about,
38026 rather than warn and continue.
38027 - Make --version work
38028 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
38031 Changes in version 0.0.2pre23 - 2004-02-29
38033 - Print a statement when the first circ is finished, so the user
38034 knows it's working.
38035 - If a relay cell is unrecognized at the end of the circuit,
38036 send back a destroy. (So attacks to mutate cells are more
38038 - New config option 'excludenodes' to avoid certain nodes for circuits.
38039 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
38040 so you can collect coredumps there.
38042 - Fix a bug in tls flushing where sometimes data got wedged and
38043 didn't flush until more data got sent. Hopefully this bug was
38044 a big factor in the random delays we were seeing.
38045 - Make 'connected' cells include the resolved IP, so the client
38046 dns cache actually gets populated.
38047 - Disallow changing from ORPort=0 to ORPort>0 on hup.
38048 - When we time-out on a stream and detach from the circuit, send an
38049 end cell down it first.
38050 - Only warn about an unknown router (in exitnodes, entrynodes,
38051 excludenodes) after we've fetched a directory.
38054 Changes in version 0.0.2pre22 - 2004-02-26
38056 - Servers publish less revealing uname information in descriptors.
38057 - More memory tracking and assertions, to crash more usefully when
38059 - If the default torrc isn't there, just use some default defaults.
38060 Plus provide an internal dirservers file if they don't have one.
38061 - When the user tries to use Tor as an http proxy, give them an http
38062 501 failure explaining that we're a socks proxy.
38063 - Dump a new router.desc on hup, to help confused people who change
38064 their exit policies and then wonder why router.desc doesn't reflect
38066 - Clean up the generic tor.sh init script that we ship with.
38068 - If the exit stream is pending on the resolve, and a destroy arrives,
38069 then the stream wasn't getting removed from the pending list. I
38070 think this was the one causing recent server crashes.
38071 - Use a more robust poll on OSX 10.3, since their poll is flaky.
38072 - When it couldn't resolve any dirservers, it was useless from then on.
38073 Now it reloads the RouterFile (or default dirservers) if it has no
38075 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
38076 many users don't even *have* a /usr/local/sbin/.
38079 Changes in version 0.0.2pre21 - 2004-02-18
38081 - There's a ChangeLog file that actually reflects the changelog.
38082 - There's a 'torify' wrapper script, with an accompanying
38083 tor-tsocks.conf, that simplifies the process of using tsocks for
38084 tor. It even has a man page.
38085 - The tor binary gets installed to sbin rather than bin now.
38086 - Retry streams where the connected cell hasn't arrived in 15 seconds
38087 - Clean up exit policy handling -- get the default out of the torrc,
38088 so we can update it without forcing each server operator to fix
38090 - Allow imaps and pop3s in default exit policy
38092 - Prevent picking middleman nodes as the last node in the circuit
38095 Changes in version 0.0.2pre20 - 2004-01-30
38097 - We now have a deb package, and it's in debian unstable. Go to
38098 it, apt-getters. :)
38099 - I've split the TotalBandwidth option into BandwidthRate (how many
38100 bytes per second you want to allow, long-term) and
38101 BandwidthBurst (how many bytes you will allow at once before the cap
38102 kicks in). This better token bucket approach lets you, say, set
38103 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
38104 performance while not exceeding your monthly bandwidth quota.
38105 - Push out a tls record's worth of data once you've got it, rather
38106 than waiting until you've read everything waiting to be read. This
38107 may improve performance by pipelining better. We'll see.
38108 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
38109 from failed circuits (if they haven't been connected yet) and attach
38111 - Expire old streams that haven't managed to connect. Some day we'll
38112 have them reattach to new circuits instead.
38115 - Fix several memory leaks that were causing servers to become bloated
38117 - Fix a few very rare assert triggers. A few more remain.
38118 - Setuid to User _before_ complaining about running as root.
38121 Changes in version 0.0.2pre19 - 2004-01-07
38123 - Fix deadlock condition in dns farm. We were telling a child to die by
38124 closing the parent's file descriptor to him. But newer children were
38125 inheriting the open file descriptor from the parent, and since they
38126 weren't closing it, the socket never closed, so the child never read
38127 eof, so he never knew to exit. Similarly, dns workers were holding
38128 open other sockets, leading to all sorts of chaos.
38129 - New cleaner daemon() code for forking and backgrounding.
38130 - If you log to a file, it now prints an entry at the top of the
38131 logfile so you know it's working.
38132 - The onionskin challenge length was 30 bytes longer than necessary.
38133 - Started to patch up the spec so it's not quite so out of date.
38136 Changes in version 0.0.2pre18 - 2004-01-02
38138 - Fix endian issues with the 'integrity' field in the relay header.
38139 - Fix a potential bug where connections in state
38140 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
38143 Changes in version 0.0.2pre17 - 2003-12-30
38145 - Made --debuglogfile (or any second log file, actually) work.
38146 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
38147 adversary could force us into an infinite loop.
38150 - Each onionskin handshake now includes a hash of the computed key,
38151 to prove the server's identity and help perfect forward secrecy.
38152 - Changed cell size from 256 to 512 bytes (working toward compatibility
38154 - Changed cell length to 2 bytes, and moved it to the relay header.
38155 - Implemented end-to-end integrity checking for the payloads of
38157 - Separated streamid from 'recognized' (otherwise circuits will get
38158 messed up when we try to have streams exit from the middle). We
38159 use the integrity-checking to confirm that a cell is addressed to
38161 - Randomize the initial circid and streamid values, so an adversary who
38162 breaks into a node can't learn how many circuits or streams have
38166 Changes in version 0.0.2pre16 - 2003-12-14
38168 - Fixed a bug that made HUP trigger an assert
38169 - Fixed a bug where a circuit that immediately failed wasn't being
38170 counted as a failed circuit in counting retries.
38173 - Now we close the circuit when we get a truncated cell: otherwise we're
38174 open to an anonymity attack where a bad node in the path truncates
38175 the circuit and then we open streams at him.
38176 - Add port ranges to exit policies
38177 - Add a conservative default exit policy
38178 - Warn if you're running tor as root
38179 - on HUP, retry OR connections and close/rebind listeners
38180 - options.EntryNodes: try these nodes first when picking the first node
38181 - options.ExitNodes: if your best choices happen to include any of
38182 your preferred exit nodes, you choose among just those preferred
38184 - options.ExcludedNodes: nodes that are never picked in path building
38187 Changes in version 0.0.2pre15 - 2003-12-03
38188 o Robustness and bugfixes:
38189 - Sometimes clients would cache incorrect DNS resolves, which would
38190 really screw things up.
38191 - An OP that goes offline would slowly leak all its sockets and stop
38193 - A wide variety of bugfixes in exit node selection, exit policy
38194 handling, and processing pending streams when a new circuit is
38196 - Pick nodes for a path only from those the directory says are up
38197 - Choose randomly from all running dirservers, not always the first one
38198 - Increase allowed http header size for directory fetch.
38199 - Stop writing to stderr (if we're daemonized it will be closed).
38200 - Enable -g always, so cores will be more useful to me.
38201 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
38204 - Wrote a man page. It lists commonly used options.
38207 - Change default loglevel to warn.
38208 - Make PidFile default to null rather than littering in your CWD.
38209 - OnionRouter config option is now obsolete. Instead it just checks
38211 - Moved to a single unified torrc file for both clients and servers.
38214 Changes in version 0.0.2pre14 - 2003-11-29
38215 o Robustness and bugfixes:
38216 - Force the admin to make the DataDirectory himself
38217 - to get ownership/permissions right
38218 - so clients no longer make a DataDirectory and then never use it
38219 - fix bug where a client who was offline for 45 minutes would never
38220 pull down a directory again
38221 - fix (or at least hide really well) the dns assert bug that was
38222 causing server crashes
38223 - warnings and improved robustness wrt clockskew for certs
38224 - use the native daemon(3) to daemonize, when available
38225 - exit if bind() fails
38226 - exit if neither socksport nor orport is defined
38227 - include our own tor_timegm (Win32 doesn't have its own)
38228 - bugfix for win32 with lots of connections
38229 - fix minor bias in PRNG
38230 - make dirserver more robust to corrupt cached directory
38233 - Wrote the design document (woo)
38235 o Circuit building and exit policies:
38236 - Circuits no longer try to use nodes that the directory has told them
38238 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
38239 bitcounts (18.0.0.0/8).
38240 - Make AP connections standby for a circuit if no suitable circuit
38241 exists, rather than failing
38242 - Circuits choose exit node based on addr/port, exit policies, and
38243 which AP connections are standing by
38244 - Bump min pathlen from 2 to 3
38245 - Relay end cells have a payload to describe why the stream ended.
38246 - If the stream failed because of exit policy, try again with a new
38248 - Clients have a dns cache to remember resolved addresses.
38249 - Notice more quickly when we have no working circuits
38252 - APPort is now called SocksPort
38253 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
38255 - RecommendedVersions is now a config variable rather than
38256 hardcoded (for dirservers)
38257 - Reloads config on HUP
38258 - Usage info on -h or --help
38259 - If you set User and Group config vars, it'll setu/gid to them.
38262 Changes in version 0.0.2pre13 - 2003-10-19
38263 o General stability:
38264 - SSL_write no longer fails when it returns WANTWRITE and the number
38265 of bytes in the buf has changed by the next SSL_write call.
38266 - Fix segfault fetching directory when network is down
38267 - Fix a variety of minor memory leaks
38268 - Dirservers reload the fingerprints file on HUP, so I don't have
38269 to take down the network when I approve a new router
38270 - Default server config file has explicit Address line to specify fqdn
38273 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
38274 - Make listener connections not ever alloc bufs
38276 o Autoconf improvements:
38277 - don't clobber an external CFLAGS in ./configure
38278 - Make install now works
38279 - create var/lib/tor on make install
38280 - autocreate a tor.sh initscript to help distribs
38281 - autocreate the torrc and sample-server-torrc with correct paths
38283 o Log files and Daemonizing now work:
38284 - If --DebugLogFile is specified, log to it at -l debug
38285 - If --LogFile is specified, use it instead of commandline
38286 - If --RunAsDaemon is set, tor forks and backgrounds on startup