1 Changes in version 0.4.7.3-alpha - 2021-12-15
2 This third alpha release of the 0.4.7.x series fixes several bugs including
3 two major ones affecting Bridges and Relays (see below). If you are running
4 an earlier 0.4.7.x version, you should upgrade to this version.
6 o Major bugfixes (bridges):
7 - Make Tor work reliably again when you have multiple bridges
8 configured and one or more of them are unreachable. The problem
9 came because we require that we have bridge descriptors for both
10 of our first two bridges (else we refuse to try to connect), but
11 in some cases we would wait three hours before trying to fetch
12 these missing descriptors, and/or never recover when we do try to
13 fetch them. Fixes bugs 40396 and 40495; bugfix on 0.3.0.5-rc
16 o Major bugfixes (relay, overload):
17 - Change the MetricsPort DNS "timeout" label to be "tor_timeout" in
18 order to indicate that this was a DNS timeout from tor perspective
19 and not the DNS server itself.
20 - Deprecate overload_dns_timeout_period_secs and
21 overload_dns_timeout_scale_percent consensus parameters as well.
22 They were used to assess the overload state which is no more now.
23 - Don't make Tor DNS timeout trigger an overload general state.
24 These timeouts are different from DNS server timeout. They have to
25 be seen as timeout related to UX and not because of a network
26 problem. Fixes bug 40527; bugfix on 0.4.6.1-alpha.
28 o Minor feature (reproducible build):
29 - The repository can now build reproducible tarballs which adds the
30 build command "make dist-reprod" for that purpose. Closes
33 o Minor features (compilation):
34 - Give an error message if trying to build with a version of
35 LibreSSL known not to work with Tor. (There's an incompatibility
36 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
37 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
40 o Minor features (fallbackdir):
41 - Regenerate fallback directories generated on December 15, 2021.
43 o Minor features (geoip data):
44 - Update the geoip files to match the IPFire Location Database, as
45 retrieved on 2021/12/15.
47 o Minor features (portability):
48 - Try to prevent a compiler warning about printf arguments that
49 could sometimes occur on MSYS2 depending on the configuration.
52 o Minor bugfix (pluggable transport):
53 - Do not kill a managed proxy if one of its transport configurations
54 emits a method error. Instead log a warning and continue processing
55 method arguments. Fixes bug 7362; bugfix on 0.2.3.6-alpha.
57 o Minor bugfixes (bridges):
58 - When we don't yet have a descriptor for one of our bridges,
59 disable the entry guard retry schedule on that bridge. The entry
60 guard retry schedule and the bridge descriptor retry schedule can
61 conflict, e.g. where we mark a bridge as "maybe up" yet we don't
62 try to fetch its descriptor yet, leading Tor to wait (refusing to
63 do anything) until it becomes time to fetch the descriptor. Fixes
64 bug 40497; bugfix on 0.3.0.3-alpha.
66 o Minor bugfixes (compilation):
67 - Fix our configuration logic to detect whether we had OpenSSL 3:
68 previously, our logic was reversed. This has no other effect than
69 to change whether we suppress deprecated API warnings. Fixes bug
70 40429; bugfix on 0.3.5.13.
72 o Minor bugfixes (controller, path bias):
73 - When a circuit's path is specified, in full or in part, from the
74 controller API, do not count that circuit towards our path-bias
75 calculations. (Doing so was incorrect, since we cannot tell
76 whether the controller is selecting relays randomly.) Resolves a
77 "Bug" warning. Fixes bug 40515; bugfix on 0.2.4.10-alpha.
79 o Minor bugfixes (logging):
80 - When we no longer have enough directory information to use the
81 network, we would log a notice-level message -- but we would not
82 reliably log a message when we recovered and resumed using the
83 network. Now make sure there is always a corresponding message
84 about recovering. Fixes bug 40496; bugfix on 0.3.5.1-alpha.
86 o Minor bugfixes (performance, DoS):
87 - Fix one case of a not-especially viable denial-of-service attack
88 found by OSS-Fuzz in our consensus-diff parsing code. This attack
89 causes a lot small of memory allocations and then immediately
90 frees them: this is only slow when running with all the sanitizers
91 enabled. Fixes one case of bug 40472; bugfix on 0.3.1.1-alpha.
93 o Minor bugfixes (relay):
94 - Reject IPv6-only DirPorts. Our reachability self-test forces
95 DirPorts to be IPv4, but our configuration parser allowed them to
96 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
97 bugfix on 0.4.5.1-alpha.
99 o Minor bugfixes (sandbox):
100 - Fix the sandbox on i386 by modifying it to allow the
101 "clock_gettime64" and "statx" system calls and to filter the
102 "chown32" and "stat64" system calls in place of "chown" and
103 "stat", respectively. Fixes bug 40505; bugfix on 0.2.5.4-alpha.
105 o Documentation (man, relay):
106 - Missing "OverloadStatistics" in tor.1 manpage. Fixes bug 40504;
107 bugfix on 0.4.6.1-alpha.
110 Changes in version 0.4.7.2-alpha - 2021-10-26
111 This second alpha release of the 0.4.7.x series adds two major
112 features: congestion control (prop324) for network performance, and
113 the MiddleOnly flag (prop335) voted by the authorities to pin relays
114 to the middle position for various network health reasons. This
115 release also fixes numerous bugs.
117 The congestion control feature, detailed in proposal 324, still needs
118 more work before we can enable it by default. It is currently in its
119 testing and tuning phase which means that you should expect more
120 0.4.7.x alphas as congestion control gets stabilized and tuned for
121 optimal performance. And so, at this release, it can not be used
122 without a custom patch.
124 o Major features (congestion control):
125 - Implement support for flow control over congestion controlled
126 circuits. This work comes from proposal 324. Closes ticket 40450.
128 o Major features (directory authority):
129 - Add a new consensus method to handle MiddleOnly specially. When
130 enough authorities are using this method, then any relay tagged
131 with the MiddleOnly flag will have its Exit, Guard, HSDir, and
132 V2Dir flags automatically cleared, and will have its BadExit flag
133 automatically set. Implements part of proposal 335.
134 - Authorities can now be configured to label relays as "MiddleOnly".
135 When voting for this flag, authorities automatically vote against
136 Exit, Guard, HSDir, and V2Dir; and in favor of BadExit. Implements
137 part of proposal 335. Based on a patch from Neel Chauhan.
139 o Major bugfix (relay, metrics):
140 - On the MetricsPort, the DNS error statistics are not reported by
141 record type ("record=...") anymore due to a libevent bug
142 (https://github.com/libevent/libevent/issues/1219). Fixes bug
143 40490; bugfix on 0.4.7.1-alpha.
145 o Major bugfixes (relay, overload state):
146 - Relays report the general overload state for DNS timeout errors
147 only if X% of all DNS queries over Y seconds are errors. Before
148 that, it only took 1 timeout to report the overload state which
149 was just too low of a threshold. The X and Y values are 1% and 10
150 minutes respectively but they are also controlled by consensus
151 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
153 o Minor feature (authority, relay):
154 - Reject End-Of-Life relays running version 0.4.2.x, 0.4.3.x,
155 0.4.4.x and 0.4.5 alphas/rc. Closes ticket 40480.
157 o Minor feature (onion service v2):
158 - Onion service v2 addresses are now not recognized anymore by tor
159 meaning a bad hostname is returned when attempting to pass it on a
160 SOCKS connection. No more deprecation log is emitted client side.
162 - See https://blog.torproject.org/v2-deprecation-timeline for
163 details on how to transition from v2 to v3.
165 o Minor features (fallbackdir):
166 - Regenerate fallback directories for October 2021. Closes
169 o Minor features (logging, heartbeat):
170 - When a relay receives a cell that isn't encrypted properly for it,
171 but the relay is the last hop on the circuit, the relay now counts
172 how many cells of this kind it receives, on how many circuits, and
173 reports this information in the log. Previously, we'd log each
174 cell at PROTOCOL_WARN level, which is far too verbose to be
175 useful. Fixes part of ticket 40400.
177 o Minor features (testing):
178 - We now have separate fuzzers for the inner layers of v3 onion
179 service descriptors, to prevent future bugs like 40392. Closes
182 o Minor bugfixes (compilation):
183 - Fix compilation error when __NR_time is not defined. Fixes bug
184 40465; bugfix on 0.2.5.5-alpha. Patch by Daniel Pinto.
186 o Minor bugfixes (dirauth, bandwidth scanner):
187 - Add the AuthDirDontVoteOnDirAuthBandwidth dirauth config parameter
188 to avoid voting on bandwidth scanner weights to v3 directory
189 authorities. Fixes bug 40471; bugfix on 0.2.2.1-alpha. Patch by
192 o Minor bugfixes (fragile-hardening, sandbox):
193 - When building with --enable-fragile-hardening, add or relax Linux
194 seccomp rules to allow AddressSanitizer to execute normally if the
195 process terminates with the sandbox active. This has the side
196 effect of disabling the filtering of file- and directory-open
197 requests on most systems and dilutes the effectiveness of the
198 sandbox overall, as a wider range of system calls must be
199 permitted. Fixes bug 11477; bugfix on 0.2.5.4-alpha.
201 o Minor bugfixes (logging):
202 - If a channel has never received or transmitted a cell, or seen a
203 client, do not calculate time diffs against 1/1/1970 but log a
204 better prettier message. Fixes bug 40182; bugfix on 0.2.4.4.
206 o Minor bugfixes (onion service):
207 - Fix a warning BUG that would occur often on heavily loaded onion
208 service leading to filling the logs with useless warnings. Fixes
209 bug 34083; bugfix on 0.3.2.1-alpha.
211 o Minor bugfix (CI, onion service):
212 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
213 bugfix on 0.3.2.1-alpha.
215 o Minor bugfixes (onion service, config):
216 - Fix a memory leak for a small config line string that could occur
217 if the onion service failed to be configured from file properly.
218 Fixes bug 40484; bugfix on 0.3.2.1-alpha.
220 o Minor bugfixes (onion service, TROVE-2021-008):
221 - Only log v2 access attempts once total, in order to not pollute
222 the logs with warnings and to avoid recording the times on disk
223 when v2 access was attempted. Note that the onion address was
224 _never_ logged. This counts as a Low-severity security issue.
225 Fixes bug 40474; bugfix on 0.4.5.8.
226 - Note that due to #40476 which removes v2 support entirely, this
227 log line is not emitted anymore. We still mention this in the
228 changelog because it is a Low-severity TROVE.
230 o Minor bugfixes (usability):
231 - Do not log "RENDEZVOUS1 cell with unrecognized rendezvous cookie"
232 at LOG_PROTOCOL_WARN; instead log it at DEBUG. This warning can
233 happen naturally if a client gives up on a rendezvous circuit
234 after sending INTRODUCE1. Fixes part of bug 40400; bugfix
236 - Do not log "circuit_receive_relay_cell failed" at
237 LOG_PROTOCOL_WARN; instead log it at DEBUG. In every case where we
238 would want to log this as a protocol warning, we are already
239 logging another warning from inside circuit_receive_relay_cell.
240 Fixes part of bug 40400; bugfix on 0.1.1.9-alpha.
242 o Code simplification and refactoring:
243 - Lower the official maximum for "guard-extreme-restriction-percent"
244 to 100. This has no effect on when the guard code will generate a
245 warning, but it makes the intent of the option clearer. Fixes bug
246 40486; bugfix on 0.3.0.1-alpha.
249 - Add unit tests for the Linux seccomp sandbox. Resolves
252 o Code simplification and refactoring (rust):
253 - Remove Rust support and its associated code. It is unsupported and
254 Rust focus should be shifted to arti. Closes ticket 40469.
256 o Testing (CI, chutney):
257 - Bump the data size that chutney transmits to 5MBytes in order to
258 trigger the flow control and congestion window code. Closes
262 Changes in version 0.4.6.8 - 2021-10-26
263 This version fixes several bugs from earlier versions of Tor. One
264 highlight is a fix on how we track DNS timeouts to report general
267 o Major bugfixes (relay, overload state):
268 - Relays report the general overload state for DNS timeout errors
269 only if X% of all DNS queries over Y seconds are errors. Before
270 that, it only took 1 timeout to report the overload state which
271 was just too low of a threshold. The X and Y values are 1% and 10
272 minutes respectively but they are also controlled by consensus
273 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
275 o Minor features (fallbackdir):
276 - Regenerate fallback directories for October 2021. Closes
279 o Minor features (testing):
280 - On a testing network, relays can now use the
281 TestingMinTimeToReportBandwidth option to change the smallest
282 amount of time over which they're willing to report their observed
283 maximum bandwidth. Previously, this was fixed at 1 day. For
284 safety, values under 2 hours are only supported on testing
285 networks. Part of a fix for ticket 40337.
286 - Relays on testing networks no longer rate-limit how frequently
287 they are willing to report new bandwidth measurements. Part of a
288 fix for ticket 40337.
289 - Relays on testing networks now report their observed bandwidths
290 immediately from startup. Previously, they waited until they had
291 been running for a full day. Closes ticket 40337.
293 o Minor bugfix (onion service):
294 - Do not flag an HSDir as non-running in case the descriptor upload
295 or fetch fails. An onion service closes pending directory
296 connections before uploading a new descriptor which can thus lead
297 to wrongly flagging many relays and thus affecting circuit building
298 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
299 - Improve logging when a bad HS version is given. Fixes bug 40476;
300 bugfix on 0.4.6.1-alpha.
302 o Minor bugfix (CI, onion service):
303 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
304 bugfix on 0.3.2.1-alpha.
306 o Minor bugfixes (compatibility):
307 - Fix compatibility with the most recent Libevent versions, which no
308 longer have an evdns_set_random_bytes() function. Because this
309 function has been a no-op since Libevent 2.0.4-alpha, it is safe
310 for us to just stop calling it. Fixes bug 40371; bugfix
313 o Minor bugfixes (onion service, TROVE-2021-008):
314 - Only log v2 access attempts once total, in order to not pollute
315 the logs with warnings and to avoid recording the times on disk
316 when v2 access was attempted. Note that the onion address was
317 _never_ logged. This counts as a Low-severity security issue.
318 Fixes bug 40474; bugfix on 0.4.5.8.
321 Changes in version 0.4.5.11 - 2021-10-26
322 The major change in this version is that v2 onion services are now
323 disabled at the client, service, and relay: any Tor nodes running this
324 version and onward will stop supporting v2 onion services. This is the
325 last step in the long deprecation process of v2 onion services.
326 Everyone running an earlier version, whether as a client, a relay, or
327 an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
330 o Major feature (onion service v2):
331 - See https://blog.torproject.org/v2-deprecation-timeline for
332 details on how to transition from v2 to v3.
333 - The control port commands HSFETCH and HSPOST no longer allow
334 version 2, and it is no longer possible to create a v2 service
336 - Tor no longer allows creating v2 services, or connecting as a
337 client to a v2 service. Relays will decline to be a v2 HSDir or
338 introduction point. This effectively disables onion service
339 version 2 Tor-wide. Closes ticket 40476.
341 o Minor features (bridge, backport from 0.4.6.8):
342 - We now announce the URL to Tor's new bridge status at
343 https://bridges.torproject.org/ when Tor is configured to run as a
344 bridge relay. Closes ticket 30477.
346 o Minor features (fallbackdir):
347 - Regenerate fallback directories for October 2021. Closes
350 o Minor features (logging, diagnostic, backport from 0.4.6.5):
351 - Log decompression failures at a higher severity level, since they
352 can help provide missing context for other warning messages. We
353 rate-limit these messages, to avoid flooding the logs if they
354 begin to occur frequently. Closes ticket 40175.
356 o Minor features (testing, backport from 0.4.6.8):
357 - On a testing network, relays can now use the
358 TestingMinTimeToReportBandwidth option to change the smallest
359 amount of time over which they're willing to report their observed
360 maximum bandwidth. Previously, this was fixed at 1 day. For
361 safety, values under 2 hours are only supported on testing
362 networks. Part of a fix for ticket 40337.
363 - Relays on testing networks no longer rate-limit how frequently
364 they are willing to report new bandwidth measurements. Part of a
365 fix for ticket 40337.
366 - Relays on testing networks now report their observed bandwidths
367 immediately from startup. Previously, they waited until they had
368 been running for a full day. Closes ticket 40337.
370 o Minor bugfix (CI, onion service):
371 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
372 bugfix on 0.3.2.1-alpha.
374 o Minor bugfix (onion service, backport from 0.4.6.8):
375 - Do not flag an HSDir as non-running in case the descriptor upload
376 or fetch fails. An onion service closes pending directory
377 connections before uploading a new descriptor which can thus lead
378 to wrongly flagging many relays and thus affecting circuit building
379 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
381 o Minor bugfixes (compatibility, backport from 0.4.6.8):
382 - Fix compatibility with the most recent Libevent versions, which no
383 longer have an evdns_set_random_bytes() function. Because this
384 function has been a no-op since Libevent 2.0.4-alpha, it is safe
385 for us to just stop calling it. Fixes bug 40371; bugfix
388 o Minor bugfixes (consensus handling, backport from 0.4.6.4-rc):
389 - Avoid a set of bugs that could be caused by inconsistently
390 preferring an out-of-date consensus stored in a stale directory
391 cache over a more recent one stored on disk as the latest
392 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
394 o Minor bugfixes (onion service, TROVE-2021-008, backport from 0.4.6.8):
395 - Only log v2 access attempts once total, in order to not pollute
396 the logs with warnings and to avoid recording the times on disk
397 when v2 access was attempted. Note that the onion address was
398 _never_ logged. This counts as a Low-severity security issue.
399 Fixes bug 40474; bugfix on 0.4.5.8.
402 Changes in version 0.3.5.17 - 2021-10-26
403 The major change in this version is that v2 onion services are now
404 disabled at the client, service, and relay: any Tor nodes running this
405 version and onward will stop supporting v2 onion services. This is the
406 last step in the long deprecation process of v2 onion services.
407 Everyone running an earlier version, whether as a client, a relay, or
408 an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
411 o Major feature (onion service v2, backport from 0.4.5.11):
412 - See https://blog.torproject.org/v2-deprecation-timeline for
413 details on how to transition from v2 to v3.
414 - The control port commands HSFETCH and HSPOST no longer allow
415 version 2, and it is no longer possible to create a v2 service
417 - Tor no longer allows creating v2 services, or connecting as a
418 client to a v2 service. Relays will decline to be a v2 HSDir or
419 introduction point. This effectively disables onion service
420 version 2 Tor-wide. Closes ticket 40476.
422 o Minor features (bridge, backport from 0.4.6.8):
423 - We now announce the URL to Tor's new bridge status at
424 https://bridges.torproject.org/ when Tor is configured to run as a
425 bridge relay. Closes ticket 30477.
427 o Minor features (fallbackdir):
428 - Regenerate fallback directories for October 2021. Closes
431 o Minor bugfixes (compatibility, backport from 0.4.6.8):
432 - Fix compatibility with the most recent Libevent versions, which no
433 longer have an evdns_set_random_bytes() function. Because this
434 function has been a no-op since Libevent 2.0.4-alpha, it is safe
435 for us to just stop calling it. Fixes bug 40371; bugfix
439 Changes in version 0.4.7.1-alpha - 2021-09-17
440 This version is the first alpha release of the 0.4.7.x series. One
441 major feature is Vanguards Lite, from proposal 333, to help mitigate
442 guard discovery attacks against onion services. It also includes
445 o Major features (Proposal 332, onion services, guard selection algorithm):
446 - Clients and onion services now choose four long-lived "layer 2"
447 guard relays for use as the middle hop in all onion circuits.
448 These relays are kept in place for a randomized duration averaging
449 1 week. This mitigates guard discovery attacks against clients and
450 short-lived onion services such as OnionShare. Long-lived onion
451 services that need high security should still use the Vanguards
452 addon (https://github.com/mikeperry-tor/vanguards). Closes ticket
453 40363; implements proposal 333.
455 o Minor features (bridge testing support):
456 - Let external bridge reachability testing tools discard cached
457 bridge descriptors when setting new bridges, so they can be sure
458 to get a clean reachability test. Implements ticket 40209.
460 o Minor features (fuzzing):
461 - When building with --enable-libfuzzer, use a set of compiler flags
462 that works with more recent versions of the library. Previously we
463 were using a set of flags from 2017. Closes ticket 40407.
465 o Minor features (testing configuration):
466 - When TestingTorNetwork is enabled, skip the permissions check on
467 hidden service directories. Closes ticket 40338.
468 - On a testing network, relays can now use the
469 TestingMinTimeToReportBandwidth option to change the smallest
470 amount of time over which they're willing to report their observed
471 maximum bandwidth. Previously, this was fixed at 1 day. For
472 safety, values under 2 hours are only supported on testing
473 networks. Part of a fix for ticket 40337.
474 - Relays on testing networks no longer rate-limit how frequently
475 they are willing to report new bandwidth measurements. Part of a
476 fix for ticket 40337.
477 - Relays on testing networks now report their observed bandwidths
478 immediately from startup. Previously, they waited until they had
479 been running for a full day. Closes ticket 40337.
481 o Minor bugfixes (circuit padding):
482 - Don't send STOP circuit padding cells when the other side has
483 already shut down the corresponding padding machine. Fixes bug
484 40435; bugfix on 0.4.0.1-alpha.
486 o Minor bugfixes (compatibility):
487 - Fix compatibility with the most recent Libevent versions, which no
488 longer have an evdns_set_random_bytes() function. Because this
489 function has been a no-op since Libevent 2.0.4-alpha, it is safe
490 for us to just stop calling it. Fixes bug 40371; bugfix
493 o Minor bugfixes (control, sandbox):
494 - Allows the control command SAVECONF to succeed when the seccomp
495 sandbox is enabled. Makes SAVECONF keep only one backup file, to
496 simplify implementation. Fixes bug 40317; bugfix on 0.2.5.4-alpha.
497 Patch by Daniel Pinto.
499 o Minor bugfixes (heartbeat):
500 - Adjust the heartbeat log message about distinct clients to
501 consider the HeartbeatPeriod rather than a flat 6-hour delay.
502 Fixes bug 40330; bugfix on 0.2.6.3-alpha.
504 o Minor bugfixes (logging, relay):
505 - Add spaces between the "and" when logging the "Your server has not
506 managed to confirm reachability for its" on dual-stack relays.
507 Fixes bug 40453; bugfix on 0.4.5.1-alpha. Patch by Neel Chauhan.
509 o Minor bugfixes (onion service):
510 - Do not flag an HSDir as non-running in case the descriptor upload
511 or fetch fails. An onion service closes pending directory
512 connections before uploading a new descriptor which leads to
513 wrongly flagging many relays and thus affecting circuit path
514 selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
516 o Minor bugfixes (statistics):
517 - Fix a fencepost issue when we check stability_last_downrated where
518 we called rep_hist_downrate_old_runs() twice. Fixes bug 40394;
519 bugfix on 0.2.0.5-alpha. Patch by Neel Chauhan.
521 o Minor bugfixes (tests):
522 - Fix a bug that prevented some tests from running with the correct
523 names. Fixes bug 40365; bugfix on 0.4.3.1-alpha.
526 - Add links to original tor design paper and anonbib to
527 docs/HACKING/README.1st.md. Closes ticket 33742. Patch from
529 - Describe the "fingerprint-ed25519" file in the tor.1 man page.
530 Fixes bug 40467; bugfix on 0.4.3.1-alpha. Patch by Neel Chauhan.
533 Changes in version 0.4.6.7 - 2021-08-16
534 This version fixes several bugs from earlier versions of Tor,
535 including one that could lead to a denial-of-service attack. Everyone
536 running an earlier version, whether as a client, a relay, or an onion
537 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
539 o Major bugfixes (cryptography, security):
540 - Resolve an assertion failure caused by a behavior mismatch between
541 our batch-signature verification code and our single-signature
542 verification code. This assertion failure could be triggered
543 remotely, leading to a denial of service attack. We fix this issue
544 by disabling batch verification. Fixes bug 40078; bugfix on
545 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
546 CVE-2021-38385. Found by Henry de Valence.
548 o Minor feature (fallbackdir):
549 - Regenerate fallback directories list. Close ticket 40447.
551 o Minor features (geoip data):
552 - Update the geoip files to match the IPFire Location Database, as
553 retrieved on 2021/08/12.
555 o Minor bugfix (crypto):
556 - Disable the unused batch verification feature of ed25519-donna.
557 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
560 o Minor bugfixes (onion service):
561 - Send back the extended SOCKS error 0xF6 (Onion Service Invalid
562 Address) for a v2 onion address. Fixes bug 40421; bugfix
565 o Minor bugfixes (relay):
566 - Reduce the compression level for data streaming from HIGH to LOW
567 in order to reduce CPU load on the directory relays. Fixes bug
568 40301; bugfix on 0.3.5.1-alpha.
570 o Minor bugfixes (timekeeping):
571 - Calculate the time of day correctly on systems where the time_t
572 type includes leap seconds. (This is not the case on most
573 operating systems, but on those where it occurs, our tor_timegm
574 function did not correctly invert the system's gmtime function,
575 which could result in assertion failures when calculating voting
576 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
579 Changes in version 0.4.5.10 - 2021-08-16
580 This version fixes several bugs from earlier versions of Tor,
581 including one that could lead to a denial-of-service attack. Everyone
582 running an earlier version, whether as a client, a relay, or an onion
583 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
585 o Major bugfixes (cryptography, security):
586 - Resolve an assertion failure caused by a behavior mismatch between
587 our batch-signature verification code and our single-signature
588 verification code. This assertion failure could be triggered
589 remotely, leading to a denial of service attack. We fix this issue
590 by disabling batch verification. Fixes bug 40078; bugfix on
591 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
592 CVE-2021-38385. Found by Henry de Valence.
594 o Minor feature (fallbackdir):
595 - Regenerate fallback directories list. Close ticket 40447.
597 o Minor features (geoip data):
598 - Update the geoip files to match the IPFire Location Database, as
599 retrieved on 2021/08/12.
601 o Minor features (testing):
602 - Enable the deterministic RNG for unit tests that covers the
603 address set bloomfilter-based API's. Fixes bug 40419; bugfix
606 o Minor bugfix (crypto, backport from 0.4.6.7):
607 - Disable the unused batch verification feature of ed25519-donna.
608 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
611 o Minor bugfixes (relay, backport from 0.4.6.7):
612 - Reduce the compression level for data streaming from HIGH to LOW.
613 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
615 o Minor bugfixes (timekeeping, backport from 0.4.6.7):
616 - Calculate the time of day correctly on systems where the time_t
617 type includes leap seconds. (This is not the case on most
618 operating systems, but on those where it occurs, our tor_timegm
619 function did not correctly invert the system's gmtime function,
620 which could result in assertion failures when calculating voting
621 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
623 o Minor bugfixes (warnings, portability, backport from 0.4.6.6):
624 - Suppress a strict-prototype warning when building with some
625 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
628 Changes in version 0.3.5.16 - 2021-08-16
629 This version fixes several bugs from earlier versions of Tor,
630 including one that could lead to a denial-of-service attack. Everyone
631 running an earlier version, whether as a client, a relay, or an onion
632 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
634 o Major bugfixes (cryptography, security):
635 - Resolve an assertion failure caused by a behavior mismatch between
636 our batch-signature verification code and our single-signature
637 verification code. This assertion failure could be triggered
638 remotely, leading to a denial of service attack. We fix this issue
639 by disabling batch verification. Fixes bug 40078; bugfix on
640 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
641 CVE-2021-38385. Found by Henry de Valence.
643 o Minor feature (fallbackdir):
644 - Regenerate fallback directories list. Close ticket 40447.
646 o Minor features (geoip data):
647 - Update the geoip files to match the IPFire Location Database, as
648 retrieved on 2021/08/12.
650 o Minor bugfix (crypto, backport from 0.4.6.7):
651 - Disable the unused batch verification feature of ed25519-donna.
652 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
655 o Minor bugfixes (relay, backport from 0.4.6.7):
656 - Reduce the compression level for data streaming from HIGH to LOW.
657 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
660 Changes in version 0.4.6.6 - 2021-06-30
661 Tor 0.4.6.6 makes several small fixes on 0.4.6.5, including one that
662 allows Tor to build correctly on older versions of GCC. You should
663 upgrade to this version if you were having trouble building Tor
664 0.4.6.5; otherwise, there is probably no need.
666 o Minor bugfixes (compilation):
667 - Fix a compilation error when trying to build Tor with a compiler
668 that does not support const variables in static initializers.
669 Fixes bug 40410; bugfix on 0.4.6.5.
670 - Suppress a strict-prototype warning when building with some
671 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
673 o Minor bugfixes (testing):
674 - Enable the deterministic RNG for unit tests that covers the
675 address set bloomfilter-based API's. Fixes bug 40419; bugfix
679 Changes in version 0.4.5.9 - 2021-06-14
680 Tor 0.4.5.9 fixes several security issues, including a
681 denial-of-service attack against onion service clients, and another
682 denial-of-service attack against relays. Everybody should upgrade to
683 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
685 o Major bugfixes (security, backport from 0.4.6.5):
686 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
687 half-closed streams. Previously, clients failed to validate which
688 hop sent these cells: this would allow a relay on a circuit to end
689 a stream that wasn't actually built with it. Fixes bug 40389;
690 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
691 003 and CVE-2021-34548.
693 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
694 - Detect more failure conditions from the OpenSSL RNG code.
695 Previously, we would detect errors from a missing RNG
696 implementation, but not failures from the RNG code itself.
697 Fortunately, it appears those failures do not happen in practice
698 when Tor is using OpenSSL's default RNG implementation. Fixes bug
699 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
700 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
702 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
703 - Resist a hashtable-based CPU denial-of-service attack against
704 relays. Previously we used a naive unkeyed hash function to look
705 up circuits in a circuitmux object. An attacker could exploit this
706 to construct circuits with chosen circuit IDs, to create
707 collisions and make the hash table inefficient. Now we use a
708 SipHash construction here instead. Fixes bug 40391; bugfix on
709 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
710 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
711 - Fix an out-of-bounds memory access in v3 onion service descriptor
712 parsing. An attacker could exploit this bug by crafting an onion
713 service descriptor that would crash any client that tried to visit
714 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
715 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
716 Glazunov from Google's Project Zero.
718 o Minor features (compatibility, backport from 0.4.6.4-rc):
719 - Remove an assertion function related to TLS renegotiation. It was
720 used nowhere outside the unit tests, and it was breaking
721 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
724 o Minor features (geoip data):
725 - Update the geoip files to match the IPFire Location Database, as
726 retrieved on 2021/06/10.
728 o Minor bugfixes (control, sandbox, backport from 0.4.6.4-rc):
729 - Allow the control command SAVECONF to succeed when the seccomp
730 sandbox is enabled, and make SAVECONF keep only one backup file to
731 simplify implementation. Previously SAVECONF allowed a large
732 number of backup files, which made it incompatible with the
733 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
736 o Minor bugfixes (metrics port, backport from 0.4.6.4-rc):
737 - Fix a bug that made tor try to re-bind() on an already open
738 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
742 Changes in version 0.4.4.9 - 2021-06-14
743 Tor 0.4.4.9 fixes several security issues, including a
744 denial-of-service attack against onion service clients, and another
745 denial-of-service attack against relays. Everybody should upgrade to
746 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
748 Note that the scheduled end-of-life date for the Tor 0.4.4.x series is
749 June 15. This is therefore the last release in its series. Everybody
750 still running 0.4.4.x should plan to upgrade to 0.4.5.x or later.
752 o Major bugfixes (security, backport from 0.4.6.5):
753 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
754 half-closed streams. Previously, clients failed to validate which
755 hop sent these cells: this would allow a relay on a circuit to end
756 a stream that wasn't actually built with it. Fixes bug 40389;
757 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
758 003 and CVE-2021-34548.
760 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
761 - Detect more failure conditions from the OpenSSL RNG code.
762 Previously, we would detect errors from a missing RNG
763 implementation, but not failures from the RNG code itself.
764 Fortunately, it appears those failures do not happen in practice
765 when Tor is using OpenSSL's default RNG implementation. Fixes bug
766 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
767 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
769 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
770 - Resist a hashtable-based CPU denial-of-service attack against
771 relays. Previously we used a naive unkeyed hash function to look
772 up circuits in a circuitmux object. An attacker could exploit this
773 to construct circuits with chosen circuit IDs, to create
774 collisions and make the hash table inefficient. Now we use a
775 SipHash construction here instead. Fixes bug 40391; bugfix on
776 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
777 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
778 - Fix an out-of-bounds memory access in v3 onion service descriptor
779 parsing. An attacker could exploit this bug by crafting an onion
780 service descriptor that would crash any client that tried to visit
781 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
782 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
783 Glazunov from Google's Project Zero.
785 o Minor features (compatibility, backport from 0.4.6.4-rc):
786 - Remove an assertion function related to TLS renegotiation. It was
787 used nowhere outside the unit tests, and it was breaking
788 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
791 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
792 - Regenerate the list of fallback directories to contain a new set
793 of 200 relays. Closes ticket 40265.
795 o Minor features (geoip data):
796 - Update the geoip files to match the IPFire Location Database, as
797 retrieved on 2021/06/10.
799 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
800 - Fix a non-fatal BUG() message due to a too-early free of a string,
801 when listing a client connection from the DoS defenses subsystem.
802 Fixes bug 40345; bugfix on 0.4.3.4-rc.
804 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
805 - Fix an indentation problem that led to a warning from GCC 11.1.1.
806 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
809 Changes in version 0.3.5.15 - 2021-06-14
810 Tor 0.3.5.15 fixes several security issues, including a
811 denial-of-service attack against onion service clients, and another
812 denial-of-service attack against relays. Everybody should upgrade to
813 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
815 o Major bugfixes (security, backport from 0.4.6.5):
816 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
817 half-closed streams. Previously, clients failed to validate which
818 hop sent these cells: this would allow a relay on a circuit to end
819 a stream that wasn't actually built with it. Fixes bug 40389;
820 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
821 003 and CVE-2021-34548.
823 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
824 - Detect more failure conditions from the OpenSSL RNG code.
825 Previously, we would detect errors from a missing RNG
826 implementation, but not failures from the RNG code itself.
827 Fortunately, it appears those failures do not happen in practice
828 when Tor is using OpenSSL's default RNG implementation. Fixes bug
829 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
830 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
832 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
833 - Resist a hashtable-based CPU denial-of-service attack against
834 relays. Previously we used a naive unkeyed hash function to look
835 up circuits in a circuitmux object. An attacker could exploit this
836 to construct circuits with chosen circuit IDs, to create
837 collisions and make the hash table inefficient. Now we use a
838 SipHash construction here instead. Fixes bug 40391; bugfix on
839 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
840 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
841 - Fix an out-of-bounds memory access in v3 onion service descriptor
842 parsing. An attacker could exploit this bug by crafting an onion
843 service descriptor that would crash any client that tried to visit
844 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
845 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
846 Glazunov from Google's Project Zero.
848 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
849 - Fix an indentation problem that led to a warning from GCC 11.1.1.
850 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
852 o Minor features (compatibility, backport from 0.4.6.4-rc):
853 - Remove an assertion function related to TLS renegotiation. It was
854 used nowhere outside the unit tests, and it was breaking
855 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
858 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
859 - Regenerate the list of fallback directories to contain a new set
860 of 200 relays. Closes ticket 40265.
862 o Minor features (geoip data):
863 - Update the geoip files to match the IPFire Location Database, as
864 retrieved on 2021/06/10.
867 Changes in version 0.4.6.5 - 2021-06-14
868 Tor 0.4.6.5 is the first stable release in its series. The 0.4.6.x
869 series includes numerous features and bugfixes, including a significant
870 improvement to our circuit timeout algorithm that should improve
871 observed client performance, and a way for relays to report when they are
874 This release also includes security fixes for several security issues,
875 including a denial-of-service attack against onion service clients,
876 and another denial-of-service attack against relays. Everybody should
877 upgrade to one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
879 Below are the changes since 0.4.6.4-rc. For a complete list of changes
880 since 0.4.5.8, see the ReleaseNotes file.
882 o Major bugfixes (security):
883 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
884 half-closed streams. Previously, clients failed to validate which
885 hop sent these cells: this would allow a relay on a circuit to end
886 a stream that wasn't actually built with it. Fixes bug 40389;
887 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
888 003 and CVE-2021-34548.
890 o Major bugfixes (security, defense-in-depth):
891 - Detect more failure conditions from the OpenSSL RNG code.
892 Previously, we would detect errors from a missing RNG
893 implementation, but not failures from the RNG code itself.
894 Fortunately, it appears those failures do not happen in practice
895 when Tor is using OpenSSL's default RNG implementation. Fixes bug
896 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
897 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
899 o Major bugfixes (security, denial of service):
900 - Resist a hashtable-based CPU denial-of-service attack against
901 relays. Previously we used a naive unkeyed hash function to look
902 up circuits in a circuitmux object. An attacker could exploit this
903 to construct circuits with chosen circuit IDs, to create
904 collisions and make the hash table inefficient. Now we use a
905 SipHash construction here instead. Fixes bug 40391; bugfix on
906 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
907 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
908 - Fix an out-of-bounds memory access in v3 onion service descriptor
909 parsing. An attacker could exploit this bug by crafting an onion
910 service descriptor that would crash any client that tried to visit
911 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
912 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
913 Glazunov from Google's Project Zero.
915 o Minor features (geoip data):
916 - Update the geoip files to match the IPFire Location Database, as
917 retrieved on 2021/06/10.
919 o Minor features (logging, diagnostic):
920 - Log decompression failures at a higher severity level, since they
921 can help provide missing context for other warning messages. We
922 rate-limit these messages, to avoid flooding the logs if they
923 begin to occur frequently. Closes ticket 40175.
926 Changes in version 0.4.6.4-rc - 2021-05-28
927 Tor 0.4.6.4-rc fixes a few bugs from previous releases. This, we hope,
928 the final release candidate in its series: unless major new issues are
929 found, the next release will be stable.
931 o Minor features (compatibility):
932 - Remove an assertion function related to TLS renegotiation. It was
933 used nowhere outside the unit tests, and it was breaking
934 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
937 o Minor bugfixes (consensus handling):
938 - Avoid a set of bugs that could be caused by inconsistently
939 preferring an out-of-date consensus stored in a stale directory
940 cache over a more recent one stored on disk as the latest
941 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
943 o Minor bugfixes (control, sandbox):
944 - Allow the control command SAVECONF to succeed when the seccomp
945 sandbox is enabled, and make SAVECONF keep only one backup file to
946 simplify implementation. Previously SAVECONF allowed a large
947 number of backup files, which made it incompatible with the
948 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
951 o Minor bugfixes (metrics port):
952 - Fix a bug that made tor try to re-bind() on an already open
953 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
957 - Remove unneeded code for parsing private keys in directory
958 documents. This code was only used for client authentication in v2
959 onion services, which are now unsupported. Closes ticket 40374.
962 Changes in version 0.4.5.8 - 2021-05-10
963 Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes
964 from the 0.4.6.x series.
966 o Minor features (compatibility, Linux seccomp sandbox, backport from 0.4.6.3-rc):
967 - Add a workaround to enable the Linux sandbox to work correctly
968 with Glibc 2.33. This version of Glibc has started using the
969 fstatat() system call, which previously our sandbox did not allow.
970 Closes ticket 40382; see the ticket for a discussion of trade-offs.
972 o Minor features (compilation, backport from 0.4.6.3-rc):
973 - Make the autoconf script build correctly with autoconf versions
974 2.70 and later. Closes part of ticket 40335.
976 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
977 - Regenerate the list of fallback directories to contain a new set
978 of 200 relays. Closes ticket 40265.
980 o Minor features (geoip data):
981 - Update the geoip files to match the IPFire Location Database, as
982 retrieved on 2021/05/07.
984 o Minor features (onion services):
985 - Add warning message when connecting to now deprecated v2 onion
986 services. As announced, Tor 0.4.5.x is the last series that will
987 support v2 onions. Closes ticket 40373.
989 o Minor bugfixes (bridge, pluggable transport, backport from 0.4.6.2-alpha):
990 - Fix a regression that made it impossible start Tor using a bridge
991 line with a transport name and no fingerprint. Fixes bug 40360;
992 bugfix on 0.4.5.4-rc.
994 o Minor bugfixes (build, cross-compilation, backport from 0.4.6.3-rc):
995 - Allow a custom "ar" for cross-compilation. Our previous build
996 script had used the $AR environment variable in most places, but
997 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
999 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
1000 - Fix a non-fatal BUG() message due to a too-early free of a string,
1001 when listing a client connection from the DoS defenses subsystem.
1002 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1004 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
1005 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1006 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1008 o Minor bugfixes (controller, backport from 0.4.6.1-alpha):
1009 - Fix a "BUG" warning that would appear when a controller chooses
1010 the first hop for a circuit, and that circuit completes. Fixes bug
1011 40285; bugfix on 0.3.2.1-alpha.
1013 o Minor bugfixes (onion service, client, memory leak, backport from 0.4.6.3-rc):
1014 - Fix a bug where an expired cached descriptor could get overwritten
1015 with a new one without freeing it, leading to a memory leak. Fixes
1016 bug 40356; bugfix on 0.3.5.1-alpha.
1018 o Minor bugfixes (testing, BSD, backport from 0.4.6.2-alpha):
1019 - Fix pattern-matching errors when patterns expand to invalid paths
1020 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
1024 Changes in version 0.4.6.3-rc - 2021-05-10
1025 Tor 0.4.6.3-rc is the first release candidate in its series. It fixes
1026 a few small bugs from previous versions, and adds a better error
1027 message when trying to use (no longer supported) v2 onion services.
1029 Though we anticipate that we'll be doing a bit more clean-up between
1030 now and the stable release, we expect that our remaining changes will
1031 be fairly simple. There will likely be at least one more release
1032 candidate before 0.4.6.x is stable.
1034 o Major bugfixes (onion service, control port):
1035 - Make the ADD_ONION command properly configure client authorization.
1036 Before this fix, the created onion failed to add the client(s).
1037 Fixes bug 40378; bugfix on 0.4.6.1-alpha.
1039 o Minor features (compatibility, Linux seccomp sandbox):
1040 - Add a workaround to enable the Linux sandbox to work correctly
1041 with Glibc 2.33. This version of Glibc has started using the
1042 fstatat() system call, which previously our sandbox did not allow.
1043 Closes ticket 40382; see the ticket for a discussion of trade-offs.
1045 o Minor features (compilation):
1046 - Make the autoconf script build correctly with autoconf versions
1047 2.70 and later. Closes part of ticket 40335.
1049 o Minor features (geoip data):
1050 - Update the geoip files to match the IPFire Location Database, as
1051 retrieved on 2021/05/07.
1053 o Minor features (onion services):
1054 - Add a warning message when trying to connect to (no longer
1055 supported) v2 onion services. Closes ticket 40373.
1057 o Minor bugfixes (build, cross-compilation):
1058 - Allow a custom "ar" for cross-compilation. Our previous build
1059 script had used the $AR environment variable in most places, but
1060 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
1062 o Minor bugfixes (compiler warnings):
1063 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1064 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1066 o Minor bugfixes (logging, relay):
1067 - Emit a warning if an Address is found to be internal and tor can't
1068 use it. Fixes bug 40290; bugfix on 0.4.5.1-alpha.
1070 o Minor bugfixes (onion service, client, memory leak):
1071 - Fix a bug where an expired cached descriptor could get overwritten
1072 with a new one without freeing it, leading to a memory leak. Fixes
1073 bug 40356; bugfix on 0.3.5.1-alpha.
1076 Changes in version 0.4.6.2-alpha - 2021-04-15
1077 Tor 0.4.6.2-alpha is the second alpha in its series. It fixes several
1078 small bugs in previous releases, and solves other issues that had
1079 enabled denial-of-service attacks and affected integration with
1082 o Minor features (client):
1083 - Clients now check whether their streams are attempting to re-enter
1084 the Tor network (i.e. to send Tor traffic over Tor), and close
1085 them preemptively if they think exit relays will refuse them for
1086 this reason. See ticket 2667 for details. Closes ticket 40271.
1088 o Minor features (command line):
1089 - Add long format name "--torrc-file" equivalent to the existing
1090 command-line option "-f". Closes ticket 40324. Patch by
1093 o Minor features (dormant mode):
1094 - Add a new 'DormantTimeoutEnabled' option to allow coarse-grained
1095 control over whether the client ever becomes dormant from
1096 inactivity. Most people won't need this. Closes ticket 40228.
1098 o Minor features (fallback directory list):
1099 - Regenerate the list of fallback directories to contain a new set
1100 of 200 relays. Closes ticket 40265.
1102 o Minor features (geoip data):
1103 - Update the geoip files to match the IPFire Location Database, as
1104 retrieved on 2021/04/13.
1106 o Minor features (logging):
1107 - Edit heartbeat log messages so that more of them begin with the
1108 string "Heartbeat: ". Closes ticket 40322; patch
1111 o Minor bugfixes (bridge, pluggable transport):
1112 - Fix a regression that made it impossible start Tor using a bridge
1113 line with a transport name and no fingerprint. Fixes bug 40360;
1114 bugfix on 0.4.5.4-rc.
1116 o Minor bugfixes (channel, DoS):
1117 - Fix a non-fatal BUG() message due to a too-early free of a string,
1118 when listing a client connection from the DoS defenses subsystem.
1119 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1121 o Minor bugfixes (compilation):
1122 - Fix a compilation warning about unused functions when building
1123 with a libc that lacks the GLOB_ALTDIRFUNC constant. Fixes bug
1124 40354; bugfix on 0.4.5.1-alpha. Patch by Daniel Pinto.
1126 o Minor bugfixes (configuration):
1127 - Fix pattern-matching for directories on all platforms when using
1128 %include options in configuration files. This patch also fixes
1129 compilation on musl libc based systems. Fixes bug 40141; bugfix
1132 o Minor bugfixes (relay):
1133 - Move the "overload-general" line from extrainfo to the server
1134 descriptor. Fixes bug 40364; bugfix on 0.4.6.1-alpha.
1136 o Minor bugfixes (testing, BSD):
1137 - Fix pattern-matching errors when patterns expand to invalid paths
1138 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
1141 o Documentation (manual):
1142 - Move the ServerTransport* options to the "SERVER OPTIONS" section.
1144 - Indicate that the HiddenServiceStatistics option also applies to
1145 bridges. Closes ticket 40346.
1146 - Move the description of BridgeRecordUsageByCountry to the section
1147 "STATISTICS OPTIONS". Closes ticket 40323.
1150 Changes in version 0.4.6.1-alpha - 2021-03-18
1151 Tor 0.4.6.1-alpha is the first alpha release in the 0.4.6.x series. It
1152 improves client circuit performance, adds missing features, and
1153 improves some of our DoS handling and statistics reporting. It also
1154 includes numerous smaller bugfixes.
1156 Below are the changes since 0.4.5.7. (Note that this release DOES
1157 include the fixes for the security bugs already fixed in 0.4.5.7.)
1159 o Major features (control port, onion services):
1160 - Add controller support for creating version 3 onion services with
1161 client authorization. Previously, only v2 onion services could be
1162 created with client authorization. Closes ticket 40084. Patch by
1165 o Major features (directory authority):
1166 - When voting on a relay with a Sybil-like appearance, add the Sybil
1167 flag when clearing out the other flags. This lets a relay operator
1168 know why their relay hasn't been included in the consensus. Closes
1169 ticket 40255. Patch by Neel Chauhan.
1171 o Major features (metrics):
1172 - Relays now report how overloaded they are in their extrainfo
1173 documents. This information is controlled with the
1174 OverloadStatistics torrc option, and it will be used to improve
1175 decisions about the network's load balancing. Implements proposal
1176 328; closes ticket 40222.
1178 o Major features (relay, denial of service):
1179 - Add a new DoS subsystem feature to control the rate of client
1180 connections for relays. Closes ticket 40253.
1182 o Major features (statistics):
1183 - Relays now publish statistics about the number of v3 onion
1184 services and volume of v3 onion service traffic, in the same
1185 manner they already do for v2 onions. Closes ticket 23126.
1187 o Major bugfixes (circuit build timeout):
1188 - Improve the accuracy of our circuit build timeout calculation for
1189 60%, 70%, and 80% build rates for various guard choices. We now
1190 use a maximum likelihood estimator for Pareto parameters of the
1191 circuit build time distribution, instead of a "right-censored
1192 estimator". This causes clients to ignore circuits that never
1193 finish building in their timeout calculations. Previously, clients
1194 were counting such unfinished circuits as having the highest
1195 possible build time value, when in reality these circuits most
1196 likely just contain relays that are offline. We also now wait a
1197 bit longer to let circuits complete for measurement purposes,
1198 lower the minimum possible effective timeout from 1.5 seconds to
1199 10ms, and increase the resolution of the circuit build time
1200 histogram from 50ms bin widths to 10ms bin widths. Additionally,
1201 we alter our estimate Xm by taking the maximum of the top 10 most
1202 common build time values of the 10ms histogram, and compute Xm as
1203 the average of these. Fixes bug 40168; bugfix on 0.2.2.14-alpha.
1204 - Remove max_time calculation and associated warning from circuit
1205 build timeout 'alpha' parameter estimation, as this is no longer
1206 needed by our new estimator from 40168. Fixes bug 34088; bugfix
1209 o Major bugfixes (signing key):
1210 - In the tor-gencert utility, give an informative error message if
1211 the passphrase given in `--create-identity-key` is too short.
1212 Fixes bug 40189; bugfix on 0.2.0.1-alpha. Patch by Neel Chauhan.
1214 o Minor features (bridge):
1215 - We now announce the URL to Tor's new bridge status at
1216 https://bridges.torproject.org/ when Tor is configured to run as a
1217 bridge relay. Closes ticket 30477.
1219 o Minor features (build system):
1220 - New "make lsp" command to auto generate the compile_commands.json
1221 file used by the ccls server. The "bear" program is needed for
1222 this. Closes ticket 40227.
1224 o Minor features (command-line interface):
1225 - Add build informations to `tor --version` in order to ease
1226 reproducible builds. Closes ticket 32102.
1227 - When parsing command-line flags that take an optional argument,
1228 treat the argument as absent if it would start with a '-'
1229 character. Arguments in that form are not intelligible for any of
1230 our optional-argument flags. Closes ticket 40223.
1231 - Allow a relay operator to list the ed25519 keys on the command
1232 line by adding the `rsa` and `ed25519` arguments to the
1233 --list-fingerprint flag to show the respective RSA and ed25519
1234 relay fingerprint. Closes ticket 33632. Patch by Neel Chauhan.
1236 o Minor features (control port, stream handling):
1237 - Add the stream ID to the event line in the ADDRMAP control event.
1238 Closes ticket 40249. Patch by Neel Chauhan.
1240 o Minor features (dormant mode):
1241 - Add a new 'DormantTimeoutEnabled' option for coarse-grained
1242 control over whether the client can become dormant from
1243 inactivity. Most people won't need this. Closes ticket 40228.
1245 o Minor features (logging):
1246 - Change the DoS subsystem heartbeat line format to be more clear on
1247 what has been detected/rejected, and which option is disabled (if
1248 any). Closes ticket 40308.
1249 - In src/core/mainloop/mainloop.c and src/core/mainloop/connection.c,
1250 put brackets around IPv6 addresses in log messages. Closes ticket
1251 40232. Patch by Neel Chauhan.
1253 o Minor features (performance, windows):
1254 - Use SRWLocks to implement locking on Windows. Replaces the
1255 "critical section" locking implementation with the faster
1256 SRWLocks, available since Windows Vista. Closes ticket 17927.
1257 Patch by Daniel Pinto.
1259 o Minor features (protocol, proxy support, defense in depth):
1260 - Close HAProxy connections if they somehow manage to send us data
1261 before we start reading. Closes another case of ticket 40017.
1263 o Minor features (tests, portability):
1264 - Port the hs_build_address.py test script to work with recent
1265 versions of python. Closes ticket 40213. Patch from
1268 o Minor features (vote document):
1269 - Add a "stats" line to directory authority votes, to report various
1270 statistics that authorities compute about the relays. This will
1271 help us diagnose the network better. Closes ticket 40314.
1273 o Minor bugfixes (build):
1274 - The configure script now shows whether or not lzma and zstd have
1275 been used, not just if the enable flag was passed in. Fixes bug
1276 40236; bugfix on 0.4.3.1-alpha.
1278 o Minor bugfixes (compatibility):
1279 - Fix a failure in the test cases when running on the "hppa"
1280 architecture, along with a related test that might fail on other
1281 architectures in the future. Fixes bug 40274; bugfix
1284 o Minor bugfixes (controller):
1285 - Fix a "BUG" warning that would appear when a controller chooses
1286 the first hop for a circuit, and that circuit completes. Fixes bug
1287 40285; bugfix on 0.3.2.1-alpha.
1289 o Minor bugfixes (directory authorities, voting):
1290 - Add a new consensus method (31) to support any future changes that
1291 authorities decide to make to the value of bwweightscale or
1292 maxunmeasuredbw. Previously, there was a bug that prevented the
1293 authorities from parsing these consensus parameters correctly under
1294 most circumstances. Fixes bug 19011; bugfix on 0.2.2.10-alpha.
1296 o Minor bugfixes (ipv6):
1297 - Allow non-SOCKSPorts to disable IPv4, IPv6, and PreferIPv4. Some
1298 rare configurations might break, but in this case you can disable
1299 NoIPv4Traffic and NoIPv6Traffic as needed. Fixes bug 33607; bugfix
1300 on 0.4.1.1-alpha. Patch by Neel Chauhan.
1302 o Minor bugfixes (key generation):
1303 - Do not require a valid torrc when using the `--keygen` argument to
1304 generate a signing key. This allows us to generate keys on systems
1305 or users which may not run Tor. Fixes bug 40235; bugfix on
1306 0.2.7.2-alpha. Patch by Neel Chauhan.
1308 o Minor bugfixes (onion services, logging):
1309 - Downgrade the severity of a few rendezvous circuit-related
1310 warnings from warning to info. Fixes bug 40207; bugfix on
1311 0.3.2.1-alpha. Patch by Neel Chauhan.
1313 o Minor bugfixes (relay):
1314 - Reduce the compression level for data streaming from HIGH to LOW.
1315 This should reduce the CPU and memory burden for directory caches.
1316 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
1318 o Code simplification and refactoring:
1319 - Remove the orconn_ext_or_id_map structure and related functions.
1320 (Nothing outside of unit tests used them.) Closes ticket 33383.
1321 Patch by Neel Chauhan.
1324 - As of this release, Tor no longer supports the old v2 onion
1325 services. They were deprecated last July for security, and support
1326 will be removed entirely later this year. We strongly encourage
1327 everybody to migrate to v3 onion services. For more information,
1328 see https://blog.torproject.org/v2-deprecation-timeline . Closes
1329 ticket 40266. (NOTE: We accidentally released an earlier version
1330 of the 0.4.6.1-alpha changelog without this entry. Sorry for
1333 o Code simplification and refactoring (metrics, DoS):
1334 - Move the DoS subsystem into the subsys manager, including its
1335 configuration options. Closes ticket 40261.
1337 o Removed features (relay):
1338 - Because DirPorts are only used on authorities, relays no longer
1339 advertise them. Similarly, self-testing for DirPorts has been
1340 disabled, since an unreachable DirPort is no reason for a relay
1341 not to advertise itself. (Configuring a DirPort will still work,
1342 for now.) Closes ticket 40282.
1345 Changes in version 0.3.5.14 - 2021-03-16
1346 Tor 0.3.5.14 backports fixes for two important denial-of-service bugs
1347 in earlier versions of Tor.
1349 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1350 who can send directory data to a Tor instance to force that Tor
1351 instance to consume huge amounts of CPU. This is easiest to exploit
1352 against authorities, since anybody can upload to them, but directory
1353 caches could also exploit this vulnerability against relays or clients
1354 when they download. The other vulnerability (TROVE-2021-002) only
1355 affects directory authorities, and would allow an attacker to remotely
1356 crash the authority with an assertion failure. Patches have already
1357 been provided to the authority operators, to help ensure
1360 We recommend that everybody upgrade to one of the releases that fixes
1361 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1364 This release also updates our GeoIP data source, and fixes a
1365 compatibility issue.
1367 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
1368 - Disable the dump_desc() function that we used to dump unparseable
1369 information to disk. It was called incorrectly in several places,
1370 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1371 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1372 001 and CVE-2021-28089.
1373 - Fix a bug in appending detached signatures to a pending consensus
1374 document that could be used to crash a directory authority. Fixes
1375 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1378 o Minor features (geoip data, backport from 0.4.5.7):
1379 - We have switched geoip data sources. Previously we shipped IP-to-
1380 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1381 their licensing terms, so we were unable to update them after that
1382 point. We now ship geoip files based on the IPFire Location
1383 Database instead. (See https://location.ipfire.org/ for more
1384 information). This release updates our geoip files to match the
1385 IPFire Location Database as retrieved on 2021/03/12. Closes
1388 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
1389 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1390 Closes ticket 40309.
1393 Changes in version 0.4.4.8 - 2021-03-16
1394 Tor 0.4.4.8 backports fixes for two important denial-of-service bugs
1395 in earlier versions of Tor.
1397 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1398 who can send directory data to a Tor instance to force that Tor
1399 instance to consume huge amounts of CPU. This is easiest to exploit
1400 against authorities, since anybody can upload to them, but directory
1401 caches could also exploit this vulnerability against relays or clients
1402 when they download. The other vulnerability (TROVE-2021-002) only
1403 affects directory authorities, and would allow an attacker to remotely
1404 crash the authority with an assertion failure. Patches have already
1405 been provided to the authority operators, to help ensure
1408 We recommend that everybody upgrade to one of the releases that fixes
1409 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1412 This release also updates our GeoIP data source, and fixes a
1413 compatibility issue.
1415 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
1416 - Disable the dump_desc() function that we used to dump unparseable
1417 information to disk. It was called incorrectly in several places,
1418 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1419 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1420 001 and CVE-2021-28089.
1421 - Fix a bug in appending detached signatures to a pending consensus
1422 document that could be used to crash a directory authority. Fixes
1423 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1426 o Minor features (geoip data, backport from 0.4.5.7):
1427 - We have switched geoip data sources. Previously we shipped IP-to-
1428 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1429 their licensing terms, so we were unable to update them after that
1430 point. We now ship geoip files based on the IPFire Location
1431 Database instead. (See https://location.ipfire.org/ for more
1432 information). This release updates our geoip files to match the
1433 IPFire Location Database as retrieved on 2021/03/12. Closes
1436 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
1437 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1438 Closes ticket 40309.
1441 Changes in version 0.4.5.7 - 2021-03-16
1442 Tor 0.4.5.7 fixes two important denial-of-service bugs in earlier
1445 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1446 who can send directory data to a Tor instance to force that Tor
1447 instance to consume huge amounts of CPU. This is easiest to exploit
1448 against authorities, since anybody can upload to them, but directory
1449 caches could also exploit this vulnerability against relays or clients
1450 when they download. The other vulnerability (TROVE-2021-002) only
1451 affects directory authorities, and would allow an attacker to remotely
1452 crash the authority with an assertion failure. Patches have already
1453 been provided to the authority operators, to help ensure
1456 We recommend that everybody upgrade to one of the releases that fixes
1457 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1460 This release also updates our GeoIP data source, and fixes a few
1461 smaller bugs in earlier releases.
1463 o Major bugfixes (security, denial of service):
1464 - Disable the dump_desc() function that we used to dump unparseable
1465 information to disk. It was called incorrectly in several places,
1466 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1467 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1468 001 and CVE-2021-28089.
1469 - Fix a bug in appending detached signatures to a pending consensus
1470 document that could be used to crash a directory authority. Fixes
1471 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1474 o Minor features (geoip data):
1475 - We have switched geoip data sources. Previously we shipped IP-to-
1476 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1477 their licensing terms, so we were unable to update them after that
1478 point. We now ship geoip files based on the IPFire Location
1479 Database instead. (See https://location.ipfire.org/ for more
1480 information). This release updates our geoip files to match the
1481 IPFire Location Database as retrieved on 2021/03/12. Closes
1484 o Minor bugfixes (directory authority):
1485 - Now that exit relays don't allow exit connections to directory
1486 authority DirPorts (to prevent network reentry), disable
1487 authorities' reachability self test on the DirPort. Fixes bug
1488 40287; bugfix on 0.4.5.5-rc.
1490 o Minor bugfixes (documentation):
1491 - Fix a formatting error in the documentation for
1492 VirtualAddrNetworkIPv6. Fixes bug 40256; bugfix on 0.2.9.4-alpha.
1494 o Minor bugfixes (Linux, relay):
1495 - Fix a bug in determining total available system memory that would
1496 have been triggered if the format of Linux's /proc/meminfo file
1497 had ever changed to include "MemTotal:" in the middle of a line.
1498 Fixes bug 40315; bugfix on 0.2.5.4-alpha.
1500 o Minor bugfixes (metrics port):
1501 - Fix a BUG() warning on the MetricsPort for an internal missing
1502 handler. Fixes bug 40295; bugfix on 0.4.5.1-alpha.
1504 o Minor bugfixes (onion service):
1505 - Remove a harmless BUG() warning when reloading tor configured with
1506 onion services. Fixes bug 40334; bugfix on 0.4.5.1-alpha.
1508 o Minor bugfixes (portability):
1509 - Fix a non-portable usage of "==" with "test" in the configure
1510 script. Fixes bug 40298; bugfix on 0.4.5.1-alpha.
1512 o Minor bugfixes (relay):
1513 - Remove a spammy log notice falsely claiming that the IPv4/v6
1514 address was missing. Fixes bug 40300; bugfix on 0.4.5.1-alpha.
1515 - Do not query the address cache early in the boot process when
1516 deciding if a relay needs to fetch early directory information
1517 from an authority. This bug resulted in a relay falsely believing
1518 it didn't have an address and thus triggering an authority fetch
1519 at each boot. Related to our fix for 40300.
1521 o Removed features (mallinfo deprecated):
1522 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1523 Closes ticket 40309.
1526 Changes in version 0.4.5.6 - 2021-02-15
1527 The Tor 0.4.5.x release series is dedicated to the memory of Karsten
1528 Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
1529 Karsten is best known for creating the Tor metrics portal and leading
1530 the metrics team, but he was involved in Tor from the early days. For
1531 example, while he was still a student he invented and implemented the
1532 v2 onion service directory design, and he also served as an ambassador
1533 to the many German researchers working in the anonymity field. We
1534 loved him and respected him for his patience, his consistency, and his
1535 welcoming approach to growing our community.
1537 This release series introduces significant improvements in relay IPv6
1538 address discovery, a new "MetricsPort" mechanism for relay operators
1539 to measure performance, LTTng support, build system improvements to
1540 help when using Tor as a static library, and significant bugfixes
1541 related to Windows relay performance. It also includes numerous
1542 smaller features and bugfixes.
1544 Below are the changes since 0.4.4.4-rc. For a complete list of changes
1545 since 0.4.4.7, see the ReleaseNotes file.
1547 o Major bugfixes (IPv6, relay):
1548 - Fix a bug that prevented a relay from publishing its descriptor if
1549 an auto-discovered IPv6 that was found unreachable. Fixes bug
1550 40279; bugfix on 0.4.5.1-alpha.
1552 o Minor features (protocol versions):
1553 - Stop claiming to support the "DirCache=1" subprotocol version.
1554 Technically, we stopped supporting this subprotocol back in
1555 0.4.5.1-alpha, but we needed to wait for the authorities to stop
1556 listing it as "required" before we could drop it from the list.
1557 Closes ticket 40221.
1559 o Minor bugfixes (logging):
1560 - Avoid a spurious log message about missing subprotocol versions,
1561 when the consensus that we're reading from is older than the
1562 current release. Previously we had made this message nonfatal, but
1563 in practice, it is never relevant when the consensus is older than
1564 the current release. Fixes bug 40281; bugfix on 0.4.0.1-alpha.
1566 o Minor bugfixes (metrics port):
1567 - Fix a bug warning when a metrics port socket was unexpectedly
1568 closed. Fixes bug 40257; bugfix on 0.4.5.1-alpha
1570 o Minor bugfixes (relay):
1571 - Allow relays to have a RFC1918 address if PublishServerDescriptor
1572 is set to 0 and AssumeReachable is set to 1. This is to support
1573 the use case of a bridge on a local network, exposed via a
1574 pluggable transport. Fixes bug 40208; bugfix on 0.4.5.1-alpha.
1576 o Minor bugfixes (relay, config):
1577 - Fix a problem in the removal of duplicate ORPorts from the
1578 internal port list when loading the config file. We were removing
1579 the wrong ports, breaking valid torrc uses cases for multiple
1580 ORPorts of the same address family. Fixes bug 40289; bugfix
1584 Changes in version 0.4.4.7 - 2021-02-03
1585 Tor 0.4.4.7 backports numerous bugfixes from later releases,
1586 including one that made v3 onion services more susceptible to
1587 denial-of-service attacks, and a feature that makes some kinds of
1588 DoS attacks harder to perform.
1590 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1591 - Stop requiring a live consensus for v3 clients and services, and
1592 allow a "reasonably live" consensus instead. This allows v3 onion
1593 services to work even if the authorities fail to generate a
1594 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1597 o Major feature (exit, backport from 0.4.5.5-rc):
1598 - Re-entry into the network is now denied at the Exit level to all
1599 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1600 should help mitgate a set of denial-of-service attacks. Closes
1603 o Minor feature (build system, backport from 0.4.5.4-rc):
1604 - New "make lsp" command to generate the compile_commands.json file
1605 used by the ccls language server. The "bear" program is needed for
1606 this. Closes ticket 40227.
1608 o Minor features (compilation, backport from 0.4.5.2-rc):
1609 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1610 later. There are a number of APIs newly deprecated in OpenSSL
1611 3.0.0 that Tor still requires. (A later version of Tor will try to
1612 stop depending on these APIs.) Closes ticket 40165.
1614 o Minor features (crypto, backport from 0.4.5.3-rc):
1615 - Fix undefined behavior on our Keccak library. The bug only
1616 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1617 and would result in wrong digests. Fixes bug 40210; bugfix on
1618 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1619 weasel for diagnosing this.
1621 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1622 - Strip '\r' characters when reading text files on Unix platforms.
1623 This should resolve an issue where a relay operator migrates a
1624 relay from Windows to Unix, but does not change the line ending of
1625 Tor's various state files to match the platform, and the CRLF line
1626 endings from Windows end up leaking into other files such as the
1627 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1629 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1630 - Fix a compilation warning about unreachable fallthrough
1631 annotations when building with "--enable-all-bugs-are-fatal" on
1632 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1634 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1635 - Handle partial SOCKS5 messages correctly. Previously, our code
1636 would send an incorrect error message if it got a SOCKS5 request
1637 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1639 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1640 - Fix the `config/parse_tcp_proxy_line` test so that it works
1641 correctly on systems where the DNS provider hijacks invalid
1642 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1643 - Fix our Python reference-implementation for the v3 onion service
1644 handshake so that it works correctly with the version of hashlib
1645 provided by Python 3.9. Fixes part of bug 40179; bugfix
1647 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1648 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1651 Changes in version 0.4.3.8 - 2021-02-03
1652 Tor 0.4.3.8 backports numerous bugfixes from later releases,
1653 including one that made v3 onion services more susceptible to
1654 denial-of-service attacks, and a feature that makes some kinds of
1655 DoS attacks harder to perform.
1657 Note that this is, in all likelihood, the last release of Tor 0.4.3.x,
1658 which will reach end-of-life on 15 Feb 2021.
1660 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1661 - Stop requiring a live consensus for v3 clients and services, and
1662 allow a "reasonably live" consensus instead. This allows v3 onion
1663 services to work even if the authorities fail to generate a
1664 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1667 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
1668 - Fix a bug where we were undercounting the Tor network's total
1669 onion service traffic, by ignoring any traffic originating from
1670 clients. Now we count traffic from both clients and services.
1671 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1673 o Major feature (exit, backport from 0.4.5.5-rc):
1674 - Re-entry into the network is now denied at the Exit level to all
1675 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1676 should help mitgate a set of denial-of-service attacks. Closes
1679 o Minor feature (build system, backport from 0.4.5.4-rc):
1680 - New "make lsp" command to generate the compile_commands.json file
1681 used by the ccls language server. The "bear" program is needed for
1682 this. Closes ticket 40227.
1684 o Minor features (compilation, backport from 0.4.5.2-rc):
1685 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1686 later. There are a number of APIs newly deprecated in OpenSSL
1687 3.0.0 that Tor still requires. (A later version of Tor will try to
1688 stop depending on these APIs.) Closes ticket 40165.
1690 o Minor features (crypto, backport from 0.4.5.3-rc):
1691 - Fix undefined behavior on our Keccak library. The bug only
1692 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1693 and would result in wrong digests. Fixes bug 40210; bugfix on
1694 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1695 weasel for diagnosing this.
1697 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1698 - Strip '\r' characters when reading text files on Unix platforms.
1699 This should resolve an issue where a relay operator migrates a
1700 relay from Windows to Unix, but does not change the line ending of
1701 Tor's various state files to match the platform, and the CRLF line
1702 endings from Windows end up leaking into other files such as the
1703 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1705 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
1706 - Resolve a compilation warning that could occur in
1707 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1709 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1710 - Fix a compilation warning about unreachable fallthrough
1711 annotations when building with "--enable-all-bugs-are-fatal" on
1712 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1714 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1715 - Handle partial SOCKS5 messages correctly. Previously, our code
1716 would send an incorrect error message if it got a SOCKS5 request
1717 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1719 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1720 - Fix the `config/parse_tcp_proxy_line` test so that it works
1721 correctly on systems where the DNS provider hijacks invalid
1722 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1723 - Fix our Python reference-implementation for the v3 onion service
1724 handshake so that it works correctly with the version of hashlib
1725 provided by Python 3.9. Fixes part of bug 40179; bugfix
1727 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1728 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1731 Changes in version 0.3.5.13 - 2020-02-03
1732 Tor 0.3.5.13 backports numerous bugfixes from later releases,
1733 including one that made v3 onion services more susceptible to
1734 denial-of-service attacks, and a feature that makes some kinds of
1735 DoS attacks harder to perform.
1737 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1738 - Stop requiring a live consensus for v3 clients and services, and
1739 allow a "reasonably live" consensus instead. This allows v3 onion
1740 services to work even if the authorities fail to generate a
1741 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1744 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
1745 - Fix a bug where we were undercounting the Tor network's total
1746 onion service traffic, by ignoring any traffic originating from
1747 clients. Now we count traffic from both clients and services.
1748 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1750 o Major feature (exit, backport from 0.4.5.5-rc):
1751 - Re-entry into the network is now denied at the Exit level to all
1752 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1753 should help mitgate a set of denial-of-service attacks. Closes
1756 o Minor feature (build system, backport from 0.4.5.4-rc):
1757 - New "make lsp" command to generate the compile_commands.json file
1758 used by the ccls language server. The "bear" program is needed for
1759 this. Closes ticket 40227.
1761 o Minor features (compilation, backport from 0.4.5.2-rc):
1762 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1763 later. There are a number of APIs newly deprecated in OpenSSL
1764 3.0.0 that Tor still requires. (A later version of Tor will try to
1765 stop depending on these APIs.) Closes ticket 40165.
1767 o Minor features (crypto, backport from 0.4.5.3-rc):
1768 - Fix undefined behavior on our Keccak library. The bug only
1769 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1770 and would result in wrong digests. Fixes bug 40210; bugfix on
1771 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1772 weasel for diagnosing this.
1774 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1775 - Strip '\r' characters when reading text files on Unix platforms.
1776 This should resolve an issue where a relay operator migrates a
1777 relay from Windows to Unix, but does not change the line ending of
1778 Tor's various state files to match the platform, and the CRLF line
1779 endings from Windows end up leaking into other files such as the
1780 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1782 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
1783 - Resolve a compilation warning that could occur in
1784 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1786 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1787 - Fix a compilation warning about unreachable fallthrough
1788 annotations when building with "--enable-all-bugs-are-fatal" on
1789 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1791 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1792 - Handle partial SOCKS5 messages correctly. Previously, our code
1793 would send an incorrect error message if it got a SOCKS5 request
1794 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1796 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1797 - Fix our Python reference-implementation for the v3 onion service
1798 handshake so that it works correctly with the version of hashlib
1799 provided by Python 3.9. Fixes part of bug 40179; bugfix
1801 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1802 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1805 Changes in version 0.4.5.5-rc - 2021-02-01
1806 Tor 0.4.5.5-rc is the third release candidate in its series. We're
1807 coming closer and closer to a stable release series. This release
1808 fixes an annoyance with address detection code, and somewhat mitigates
1809 an ongoing denial-of-service attack.
1811 We anticipate no more code changes between this and the stable
1812 release, though of course that could change.
1814 o Major feature (exit):
1815 - Re-entry into the network is now denied at the Exit level to all
1816 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1817 should help mitgate a set of denial-of-service attacks. Closes
1820 o Minor bugfixes (relay, configuration):
1821 - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort
1822 for it can be found in the configuration. Fixes bug 40254; bugfix
1826 Changes in version 0.4.5.4-rc - 2021-01-22
1827 Tor 0.4.5.4-rc is the second release candidate in its series. It fixes
1828 several bugs present in previous releases.
1830 We expect that the stable release will be the same, or almost the
1831 same, as this release candidate, unless serious bugs are found.
1833 o Major bugfixes (authority, IPv6):
1834 - Do not consider multiple relays in the same IPv6 /64 network to be
1835 sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
1837 o Major bugfixes (directory cache, performance, windows):
1838 - Limit the number of items in the consensus diff cache to 64 on
1839 Windows. We hope this will mitigate an issue where Windows relay
1840 operators reported Tor using 100% CPU, while we investigate better
1841 solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.
1843 o Minor feature (build system):
1844 - New "make lsp" command to generate the compile_commands.json file
1845 used by the ccls language server. The "bear" program is needed for
1846 this. Closes ticket 40227.
1848 o Minor features (authority, logging):
1849 - Log more information for directory authority operators during the
1850 consensus voting process, and while processing relay descriptors.
1851 Closes ticket 40245.
1852 - Reject obsolete router/extrainfo descriptors earlier and more
1853 quietly, to avoid spamming the logs. Fixes bug 40238; bugfix
1856 o Minor bugfixes (compilation):
1857 - Fix another warning about unreachable fallthrough annotations when
1858 building with "--enable-all-bugs-are-fatal" on some compilers.
1859 Fixes bug 40241; bugfix on 0.4.5.3-rc.
1860 - Change the linker flag ordering in our library search code so that
1861 it works for compilers that need the libraries to be listed in the
1862 right order. Fixes bug 33624; bugfix on 0.1.1.0-alpha.
1864 o Minor bugfixes (config, bridge):
1865 - Don't initiate a connection to a bridge configured to use a
1866 missing transport. This change reverts an earlier fix that would
1867 try to avoid such situations during configuration chcecking, but
1868 which doesn't work with DisableNetwork. Fixes bug 40106; bugfix
1871 o Minor bugfixes (onion services):
1872 - Avoid a non-fatal assertion in certain edge-cases when
1873 establishing a circuit to an onion service. Fixes bug 32666;
1874 bugfix on 0.3.0.3-alpha.
1876 o Minor bugfixes (relay):
1877 - If we were unable to build our descriptor, don't mark it as having
1878 been advertised. Also remove an harmless BUG(). Fixes bug 40231;
1879 bugfix on 0.4.5.1-alpha.
1882 Changes in version 0.4.5.3-rc - 2021-01-12
1883 Tor 0.4.5.3-rc is the first release candidate in its series. It fixes
1884 several bugs, including one that broke onion services on certain older
1885 ARM CPUs, and another that made v3 onion services less reliable.
1887 Though we anticipate that we'll be doing a bit more clean-up between
1888 now and the stable release, we expect that our remaining changes will
1889 be fairly simple. There will be at least one more release candidate
1890 before 0.4.5.x is stable.
1892 o Major bugfixes (onion service v3):
1893 - Stop requiring a live consensus for v3 clients and services, and
1894 allow a "reasonably live" consensus instead. This allows v3 onion
1895 services to work even if the authorities fail to generate a
1896 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1899 o Minor features (crypto):
1900 - Fix undefined behavior on our Keccak library. The bug only
1901 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1902 and would result in wrong digests. Fixes bug 40210; bugfix on
1903 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1904 weasel for diagnosing this.
1906 o Minor features (documentation):
1907 - Mention the "!badexit" directive that can appear in an authority's
1908 approved-routers file, and update the description of the
1909 "!invalid" directive. Closes ticket 40188.
1911 o Minor bugfixes (compilation):
1912 - Fix a compilation warning about unreachable fallthrough
1913 annotations when building with "--enable-all-bugs-are-fatal" on
1914 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1915 - Fix the "--enable-static-tor" switch to properly set the "-static"
1916 compile option onto the tor binary only. Fixes bug 40111; bugfix
1919 o Minor bugfixes (config, bridge):
1920 - Really fix the case where torrc has a missing ClientTransportPlugin
1921 but is configured with a Bridge line and UseBridges. Previously,
1922 we didn't look at the managed proxy list and thus would fail for
1923 the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha.
1925 o Minor bugfixes (logging, relay):
1926 - Log our address as reported by the directory authorities, if none
1927 was configured or detected before. Fixes bug 40201; bugfix
1929 - When a launching bandwidth testing circuit, don't incorrectly call
1930 it a reachability test, or trigger a "CHECKING_REACHABILITY"
1931 control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha.
1933 o Minor bugfixes (relay, statistics):
1934 - Report the correct connection statistics in our extrainfo
1935 documents. Previously there was a problem in the file loading
1936 function which would wrongly truncate a state file, causing the
1937 wrong information to be reported. Fixes bug 40226; bugfix
1940 o Minor bugfixes (SOCKS5):
1941 - Handle partial SOCKS5 messages correctly. Previously, our code
1942 would send an incorrect error message if it got a SOCKS5 request
1943 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1946 Changes in version 0.4.5.2-alpha - 2020-11-23
1947 Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series.
1948 It fixes several bugs present in earlier releases, including one that
1949 made it impractical to run relays on Windows. It also adds a few small
1950 safety features to improve Tor's behavior in the presence of strange
1951 compile-time options, misbehaving proxies, and future versions
1954 o Major bugfixes (relay, windows):
1955 - Fix a bug in our implementation of condition variables on Windows.
1956 Previously, a relay on Windows would use 100% CPU after running
1957 for some time. Because of this change, Tor now require Windows
1958 Vista or later to build and run. Fixes bug 30187; bugfix on
1959 0.2.6.3-alpha. (This bug became more serious in 0.3.1.1-alpha with
1960 the introduction of consensus diffs.) Patch by Daniel Pinto.
1962 o Minor features (compilation):
1963 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1964 later. There are a number of APIs newly deprecated in OpenSSL
1965 3.0.0 that Tor still requires. (A later version of Tor will try to
1966 stop depending on these APIs.) Closes ticket 40165.
1968 o Minor features (protocol, proxy support, defense in depth):
1969 - Respond more deliberately to misbehaving proxies that leave
1970 leftover data on their connections, so as to make Tor even less
1971 likely to allow the proxies to pass their data off as having come
1972 from a relay. Closes ticket 40017.
1974 o Minor features (safety):
1975 - Log a warning at startup if Tor is built with compile-time options
1976 that are likely to make it less stable or reliable. Closes
1979 o Minor bugfixes (circuit, handshake):
1980 - In the v3 handshaking code, use connection_or_change_state() to
1981 change the state. Previously, we changed the state directly, but
1982 this did not pass the state change to the pubsub or channel
1983 objects, potentially leading to bugs. Fixes bug 32880; bugfix on
1984 0.2.3.6-alpha. Patch by Neel Chauhan.
1986 o Minor bugfixes (compilation):
1987 - Use the correct 'ranlib' program when building libtor.a.
1988 Previously we used the default ranlib, which broke some kinds of
1989 cross-compilation. Fixes bug 40172; bugfix on 0.4.5.1-alpha.
1990 - Remove a duplicate typedef in metrics_store.c. Fixes bug 40177;
1991 bugfix on 0.4.5.1-alpha.
1992 - When USDT tracing is enabled, and STAP_PROBEV() is missing, don't
1993 attempt to build. Linux supports that macro but not the BSDs.
1994 Fixes bug 40174; bugfix on 0.4.5.1-alpha.
1996 o Minor bugfixes (configuration):
1997 - Exit Tor on a misconfiguration when the Bridge line is configured
1998 to use a transport but no corresponding ClientTransportPlugin can
1999 be found. Prior to this fix, Tor would attempt to connect to the
2000 bridge directly without using the transport, making it easier for
2001 adversaries to notice the bridge. Fixes bug 25528; bugfix
2003 - Fix an issue where an ORPort was compared with other kinds of
2004 ports, when it should have been only checked against other
2005 ORPorts. This bug would lead to "DirPort auto" getting ignored.
2006 Fixes bug 40195; bugfix on 0.4.5.1-alpha.
2007 - Fix a bug where a second non-ORPort with a variant family (ex:
2008 SocksPort [::1]:9050) would be ignored due to a configuration
2009 parsing error. Fixes bug 40183; bugfix on 0.4.5.1-alpha.
2011 o Minor bugfixes (crash, relay, signing key):
2012 - Avoid assertion failures when we run Tor from the command line
2013 with `--key-expiration sign`, but an ORPort is not set. Fixes bug
2014 40015; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
2016 o Minor bugfixes (logging):
2017 - Remove trailing whitespace from control event log messages. Fixes
2018 bug 32178; bugfix on 0.1.1.1-alpha. Based on a patch by
2020 - Turn warning-level log message about SENDME failure into a debug-
2021 level message. (This event can happen naturally, and is no reason
2022 for concern). Fixes bug 40142; bugfix on 0.4.1.1-alpha.
2024 o Minor bugfixes (relay, address discovery):
2025 - Don't trigger an IP change when no new valid IP can be found.
2026 Fixes bug 40071; bugfix on 0.4.5.1-alpha.
2027 - When attempting to discover our IP, use a simple test circuit,
2028 rather than a descriptor fetch: the same address information is
2029 present in NETINFO cells, and is better authenticated there. Fixes
2030 bug 40071; bugfix on 0.4.5.1-alpha.
2032 o Minor bugfixes (testing):
2033 - Fix the `config/parse_tcp_proxy_line` test so that it works
2034 correctly on systems where the DNS provider hijacks invalid
2035 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
2036 - Fix unit tests that used newly generated list of routers so that
2037 they check them with respect to the date when they were generated,
2038 not with respect to the current time. Fixes bug 40187; bugfix
2040 - Fix our Python reference-implementation for the v3 onion service
2041 handshake so that it works correctly with the version of hashlib
2042 provided by Python 3.9. Fixes part of bug 40179; bugfix
2044 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
2045 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
2047 o Removed features (controller):
2048 - Remove the "GETINFO network-status" controller command. It has
2049 been deprecated since 0.3.1.1-alpha. Closes ticket 22473.
2052 Changes in version 0.4.4.6 - 2020-11-12
2053 Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It
2054 backports fixes from later releases, including a fix for TROVE-2020-
2055 005, a security issue that could be used, under certain cases, by an
2056 adversary to observe traffic patterns on a limited number of circuits
2057 intended for a different relay.
2059 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2060 - When completing a channel, relays now check more thoroughly to
2061 make sure that it matches any pending circuits before attaching
2062 those circuits. Previously, address correctness and Ed25519
2063 identities were not checked in this case, but only when extending
2064 circuits on an existing channel. Fixes bug 40080; bugfix on
2065 0.2.7.2-alpha. Resolves TROVE-2020-005.
2067 o Minor features (directory authorities, backport from 0.4.5.1-alpha):
2068 - Authorities now list a different set of protocols as required and
2069 recommended. These lists have been chosen so that only truly
2070 recommended and/or required protocols are included, and so that
2071 clients using 0.2.9 or later will continue to work (even though
2072 they are not supported), whereas only relays running 0.3.5 or
2073 later will meet the requirements. Closes ticket 40162.
2074 - Make it possible to specify multiple ConsensusParams torrc lines.
2075 Now directory authority operators can for example put the main
2076 ConsensusParams config in one torrc file and then add to it from a
2077 different torrc file. Closes ticket 40164.
2079 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2080 - Tor no longer allows subprotocol versions larger than 63.
2081 Previously version numbers up to UINT32_MAX were allowed, which
2082 significantly complicated our code. Implements proposal 318;
2083 closes ticket 40133.
2085 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2086 - Fix a rendezvous cache unit test that was triggering an underflow
2087 on the global rend cache allocation. Fixes bug 40125; bugfix
2089 - Fix another rendezvous cache unit test that was triggering an
2090 underflow on the global rend cache allocation. Fixes bug 40126;
2091 bugfix on 0.2.8.1-alpha.
2093 o Minor bugfixes (compilation, backport from 0.4.5.1-alpha):
2094 - Fix compiler warnings that would occur when building with
2095 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
2096 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
2097 - Resolve a compilation warning that could occur in
2098 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2100 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2101 - Remove a debug logging statement that uselessly spammed the logs.
2102 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2104 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2105 - Avoid a fatal assert() when failing to create a listener
2106 connection for an address that was in use. Fixes bug 40073; bugfix
2109 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
2110 - For HSFETCH commands on v2 onion services addresses, check the
2111 length of bytes decoded, not the base32 length. Fixes bug 34400;
2112 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2115 Changes in version 0.4.3.7 - 2020-11-12
2116 Tor 0.4.3.7 backports several bugfixes from later releases. It
2117 includes a fix for TROVE-2020-005, a security issue that could be
2118 used, under certain cases, by an adversary to observe traffic patterns
2119 on a limited number of circuits intended for a different relay.
2121 Please be aware that support for the 0.4.3.x series will end on 15
2122 February 2021. Please upgrade to 0.4.4.x or 0.4.5.x before then, or
2123 downgrade to 0.3.5.x, which will be supported until at least 1
2126 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
2127 - Replace the 148 fallback directories originally included in Tor
2128 0.4.1.4-rc (of which around 105 are still functional) with a list
2129 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2131 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2132 - When completing a channel, relays now check more thoroughly to
2133 make sure that it matches any pending circuits before attaching
2134 those circuits. Previously, address correctness and Ed25519
2135 identities were not checked in this case, but only when extending
2136 circuits on an existing channel. Fixes bug 40080; bugfix on
2137 0.2.7.2-alpha. Resolves TROVE-2020-005.
2139 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
2140 - When running with NSS enabled, make sure that NSS knows to expect
2141 nonblocking sockets. Previously, we set our TCP sockets as
2142 nonblocking, but did not tell NSS, which in turn could lead to
2143 unexpected blocking behavior. Fixes bug 40035; bugfix
2146 o Minor features (security, backport from 0.4.4.4-rc):
2147 - Channels using obsolete versions of the Tor link protocol are no
2148 longer allowed to circumvent address-canonicity checks. (This is
2149 only a minor issue, since such channels have no way to set ed25519
2150 keys, and therefore should always be rejected for circuits that
2151 specify ed25519 identities.) Closes ticket 40081.
2153 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2154 - Tor no longer allows subprotocol versions larger than 63.
2155 Previously version numbers up to UINT32_MAX were allowed, which
2156 significantly complicated our code. Implements proposal 318;
2157 closes ticket 40133.
2159 o Minor features (tests, backport from 0.4.4.5):
2160 - Our "make check" target now runs the unit tests in 8 parallel
2161 chunks. Doing this speeds up hardened CI builds by more than a
2162 factor of two. Closes ticket 40098.
2164 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2165 - Fix a rendezvous cache unit test that was triggering an underflow
2166 on the global rend cache allocation. Fixes bug 40125; bugfix
2168 - Fix another rendezvous cache unit test that was triggering an
2169 underflow on the global rend cache allocation. Fixes bug 40126;
2170 bugfix on 0.2.8.1-alpha.
2172 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
2173 - Fix a correctness bug that could cause an assertion failure if we
2174 ever tried using the buf_move_all() function with an empty input
2175 buffer. As far as we know, no released versions of Tor do this.
2176 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
2178 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2179 - Remove a debug logging statement that uselessly spammed the logs.
2180 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2182 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
2183 - On a bridge, treat all connections from an ExtORPort as remote by
2184 default for the purposes of rate-limiting. Previously, bridges
2185 would treat the connection as local unless they explicitly
2186 received a "USERADDR" command. ExtORPort connections still count
2187 as local if there is a USERADDR command with an explicit local
2188 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
2190 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2191 - Avoid a fatal assert() when failing to create a listener
2192 connection for an address that was in use. Fixes bug 40073; bugfix
2195 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
2196 - Adjust the rules for when to warn about having too many
2197 connections to other relays. Previously we'd tolerate up to 1.5
2198 connections per relay on average. Now we tolerate more connections
2199 for directory authorities, and raise the number of total
2200 connections we need to see before we warn. Fixes bug 33880; bugfix
2203 o Minor bugfixes (tests, 0.4.4.5):
2204 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2205 on its own. Previously, it would exit with an error. Fixes bug
2206 40099; bugfix on 0.2.8.1-alpha.
2208 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
2209 - For HSFETCH commands on v2 onion services addresses, check the
2210 length of bytes decoded, not the base32 length. Fixes bug 34400;
2211 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2213 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
2214 - Fix a bug that prevented Tor from starting if its log file grew
2215 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
2217 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
2218 - Add a deprecation warning for version 2 onion services. Closes
2221 o Removed features (backport from 0.4.4.3-alpha):
2222 - Our "check-local" test target no longer tries to use the
2223 Coccinelle semantic patching tool parse all the C files. While it
2224 is a good idea to try to make sure Coccinelle works on our C
2225 before we run a Coccinelle patch, doing so on every test run has
2226 proven to be disruptive. You can still run this tool manually with
2227 "make check-cocci". Closes ticket 40030. ticket 40030.
2230 Changes in version 0.3.5.12 - 2020-11-12
2231 Tor 0.4.3.7 backports several bugfixes from later releases. It
2232 includes a fix for TROVE-2020-005, a security issue that could be
2233 used, under certain cases, by an adversary to observe traffic patterns
2234 on a limited number of circuits intended for a different relay.
2236 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
2237 - Replace the 148 fallback directories originally included in Tor
2238 0.4.1.4-rc (of which around 105 are still functional) with a list
2239 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2241 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2242 - When completing a channel, relays now check more thoroughly to
2243 make sure that it matches any pending circuits before attaching
2244 those circuits. Previously, address correctness and Ed25519
2245 identities were not checked in this case, but only when extending
2246 circuits on an existing channel. Fixes bug 40080; bugfix on
2247 0.2.7.2-alpha. Resolves TROVE-2020-005.
2249 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
2250 - When running with NSS enabled, make sure that NSS knows to expect
2251 nonblocking sockets. Previously, we set our TCP sockets as
2252 nonblocking, but did not tell NSS, which in turn could lead to
2253 unexpected blocking behavior. Fixes bug 40035; bugfix
2256 o Minor features (security, backport from 0.4.4.4-rc):
2257 - Channels using obsolete versions of the Tor link protocol are no
2258 longer allowed to circumvent address-canonicity checks. (This is
2259 only a minor issue, since such channels have no way to set ed25519
2260 keys, and therefore should always be rejected for circuits that
2261 specify ed25519 identities.) Closes ticket 40081.
2263 o Minor features (debugging, directory system):
2264 - Don't crash when we find a non-guard with a guard-fraction value
2265 set. Instead, log a bug warning, in an attempt to figure out how
2266 this happened. Diagnostic for ticket 32868.
2268 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2269 - Tor no longer allows subprotocol versions larger than 63.
2270 Previously version numbers up to UINT32_MAX were allowed, which
2271 significantly complicated our code. Implements proposal 318;
2272 closes ticket 40133.
2274 o Minor features (tests, backport from 0.4.4.5):
2275 - Our "make check" target now runs the unit tests in 8 parallel
2276 chunks. Doing this speeds up hardened CI builds by more than a
2277 factor of two. Closes ticket 40098.
2279 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2280 - Fix a rendezvous cache unit test that was triggering an underflow
2281 on the global rend cache allocation. Fixes bug 40125; bugfix
2283 - Fix another rendezvous cache unit test that was triggering an
2284 underflow on the global rend cache allocation. Fixes bug 40126;
2285 bugfix on 0.2.8.1-alpha.
2287 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
2288 - Fix a correctness bug that could cause an assertion failure if we
2289 ever tried using the buf_move_all() function with an empty input
2290 buffer. As far as we know, no released versions of Tor do this.
2291 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
2293 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2294 - Remove a debug logging statement that uselessly spammed the logs.
2295 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2297 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
2298 - On a bridge, treat all connections from an ExtORPort as remote by
2299 default for the purposes of rate-limiting. Previously, bridges
2300 would treat the connection as local unless they explicitly
2301 received a "USERADDR" command. ExtORPort connections still count
2302 as local if there is a USERADDR command with an explicit local
2303 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
2305 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2306 - Avoid a fatal assert() when failing to create a listener
2307 connection for an address that was in use. Fixes bug 40073; bugfix
2310 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
2311 - Adjust the rules for when to warn about having too many
2312 connections to other relays. Previously we'd tolerate up to 1.5
2313 connections per relay on average. Now we tolerate more connections
2314 for directory authorities, and raise the number of total
2315 connections we need to see before we warn. Fixes bug 33880; bugfix
2318 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
2319 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
2320 descriptors, when the IPv6 port was configured as "auto". Fixes
2321 bug 32588; bugfix on 0.2.3.9-alpha.
2323 o Minor bugfixes (tests, 0.4.4.5):
2324 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2325 on its own. Previously, it would exit with an error. Fixes bug
2326 40099; bugfix on 0.2.8.1-alpha.
2328 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
2329 - Fix a bug that prevented Tor from starting if its log file grew
2330 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
2332 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
2333 - Add a deprecation warning for version 2 onion services. Closes
2337 Changes in version 0.4.5.1-alpha - 2020-11-01
2338 Tor 0.4.5.1-alpha is the first alpha release in the 0.4.5.x series. It
2339 improves support for IPv6, address discovery and self-testing, code
2340 metrics and tracing.
2342 This release also fixes TROVE-2020-005, a security issue that could be
2343 used, under certain cases, by an adversary to observe traffic patterns
2344 on a limited number of circuits intended for a different relay. To
2345 mount this attack, the adversary would need to actively extend
2346 circuits to an incorrect address, as well as compromise a relay's
2347 legacy RSA-1024 key. We'll be backporting this fix to other release
2348 series soon, after it has had some testing.
2350 Here are the changes since 0.4.4.5.
2352 o Major features (build):
2353 - When building Tor, first link all object files into a single
2354 static library. This may help with embedding Tor in other
2355 programs. Note that most Tor functions do not constitute a part of
2356 a stable or supported API: only those functions in tor_api.h
2357 should be used if embedding Tor. Closes ticket 40127.
2359 o Major features (metrics):
2360 - Introduce a new MetricsPort which exposes, through an HTTP
2361 interface, a series of metrics that tor collects at runtime. At
2362 the moment, the only supported output format is Prometheus data
2363 model. Closes ticket 40063. See the manual page for more
2364 information and security considerations.
2365 o Major features (relay, IPv6):
2366 - The torrc option Address now supports IPv6. This unifies our
2367 address discovery interface to support IPv4, IPv6, and hostnames.
2368 Closes ticket 33233.
2369 - Launch IPv4 and IPv6 ORPort self-test circuits on relays and
2370 bridges. Closes ticket 33222.
2371 - Relays now automatically bind on IPv6 for their ORPort, unless
2372 specified otherwise with the IPv4Only flag. Closes ticket 33246.
2373 - When a relay with IPv6 support is told to open a connection to
2374 another relay, and the extend cell lists both IPv4 and IPv6
2375 addresses, the first relay now picks randomly which address to
2376 use. Closes ticket 33220.
2377 - Relays now track their IPv6 ORPort reachability separately from
2378 the reachability of their IPv4 ORPort. They will not publish a
2379 descriptor unless _both_ ports appear to be externally reachable.
2380 Closes ticket 34067.
2382 o Major features (tracing):
2383 - Add event-tracing library support for USDT and LTTng-UST, and a
2384 few tracepoints in the circuit subsystem. More will come
2385 incrementally. This feature is compiled out by default: it needs
2386 to be enabled at configure time. See documentation in
2387 doc/HACKING/Tracing.md. Closes ticket 32910.
2389 o Major bugfixes (security):
2390 - When completing a channel, relays now check more thoroughly to
2391 make sure that it matches any pending circuits before attaching
2392 those circuits. Previously, address correctness and Ed25519
2393 identities were not checked in this case, but only when extending
2394 circuits on an existing channel. Fixes bug 40080; bugfix on
2395 0.2.7.2-alpha. Resolves TROVE-2020-005.
2397 o Major bugfixes (TLS, buffer):
2398 - When attempting to read N bytes on a TLS connection, really try to
2399 read all N bytes. Previously, Tor would stop reading after the
2400 first TLS record, which can be smaller than the N bytes requested,
2401 and not check for more data until the next mainloop event. Fixes
2402 bug 40006; bugfix on 0.1.0.5-rc.
2404 o Minor features (address discovery):
2405 - If no Address statements are found, relays now prioritize guessing
2406 their address by looking at the local interface instead of the
2407 local hostname. If the interface address can't be found, the local
2408 hostname is used. Closes ticket 33238.
2410 o Minor features (admin tools):
2411 - Add a new --format argument to -key-expiration option to allow
2412 specifying the time format of the expiration date. Adds Unix
2413 timestamp format support. Patch by Daniel Pinto. Closes
2416 o Minor features (bootstrap reporting):
2417 - When reporting bootstrapping status on a relay, do not consider
2418 connections that have never been the target of an origin circuit.
2419 Previously, all connection failures were treated as potential
2420 bootstrapping failures, including connections that had been opened
2421 because of client requests. Closes ticket 25061.
2423 o Minor features (build):
2424 - When running the configure script, try to detect version
2425 mismatches between the OpenSSL headers and libraries, and suggest
2426 that the user should try "--with-openssl-dir". Closes 40138.
2427 - If the configure script has given any warnings, remind the user
2428 about them at the end of the script. Related to 40138.
2430 o Minor features (configuration):
2431 - Allow using wildcards (* and ?) with the %include option on
2432 configuration files. Closes ticket 25140. Patch by Daniel Pinto.
2433 - Allow the configuration options EntryNodes, ExcludeNodes,
2434 ExcludeExitNodes, ExitNodes, MiddleNodes, HSLayer2Nodes and
2435 HSLayer3Nodes to be specified multiple times. Closes ticket 28361.
2436 Patch by Daniel Pinto.
2438 o Minor features (control port):
2439 - Add a DROPTIMEOUTS command to drop circuit build timeout history
2440 and reset the current timeout. Closes ticket 40002.
2441 - When a stream enters the AP_CONN_STATE_CONTROLLER_WAIT status,
2442 send a control port event. Closes ticket 32190. Patch by
2444 - Introduce GETINFO "stats/ntor/{assigned/requested}" and
2445 "stats/tap/{assigned/requested}" to get the NTor and TAP circuit
2446 onion handshake counts respectively. Closes ticket 28279. Patch by
2449 o Minor features (control port, IPv6):
2450 - Tor relays now try to report to the controller when they are
2451 launching an IPv6 self-test. Closes ticket 34068.
2452 - Introduce "GETINFO address/v4" and "GETINFO address/v6" in the
2453 control port to fetch the Tor host's respective IPv4 or IPv6
2454 address. We keep "GETINFO address" for backwards-compatibility.
2455 Closes ticket 40039. Patch by Neel Chauhan.
2457 o Minor features (directory authorities):
2458 - Authorities now list a different set of protocols as required and
2459 recommended. These lists have been chosen so that only truly
2460 recommended and/or required protocols are included, and so that
2461 clients using 0.2.9 or later will continue to work (even though
2462 they are not supported), whereas only relays running 0.3.5 or
2463 later will meet the requirements. Closes ticket 40162.
2464 - Add a new consensus method 30 that removes the unnecessary "="
2465 padding from ntor-onion-key. Closes ticket 7869. Patch by
2467 - Directory authorities now reject descriptors from relays running
2468 Tor versions from the obsolete 0.4.1 series. Resolves ticket
2469 34357. Patch by Neel Chauhan.
2470 - Make it possible to specify multiple ConsensusParams torrc lines.
2471 Now directory authority operators can for example put the main
2472 ConsensusParams config in one torrc file and then add to it from a
2473 different torrc file. Closes ticket 40164.
2474 - The AssumeReachable option no longer stops directory authorities
2475 from checking whether other relays are running. A new
2476 AuthDirTestReachability option can be used to disable these
2477 checks. Closes ticket 34445.
2478 - When looking for possible Sybil attacks, also consider IPv6
2479 addresses. Two routers are considered to have "the same" address
2480 by this metric if they are in the same /64 network. Patch from
2481 Maurice Pibouin. Closes ticket 7193.
2483 o Minor features (directory authorities, IPv6):
2484 - Make authorities add their IPv6 ORPort (if any) to the trusted
2485 servers list. Authorities previously added only their IPv4
2486 addresses. Closes ticket 32822.
2488 o Minor features (ed25519, relay):
2489 - Save a relay's base64-encoded ed25519 identity key to the data
2490 directory in a file named fingerprint-ed25519. Closes ticket
2491 30642. Patch by Neel Chauhan.
2493 o Minor features (heartbeat):
2494 - Include the total number of inbound and outbound IPv4 and IPv6
2495 connections in the heartbeat message. Closes ticket 29113.
2497 o Minor features (IPv6, ExcludeNodes):
2498 - Handle IPv6 addresses in ExcludeNodes; previously they were
2499 ignored. Closes ticket 34065. Patch by Neel Chauhan.
2501 o Minor features (logging):
2502 - Add the running glibc version to the log, and the compiled glibc
2503 version to the library list returned when using --library-versions.
2504 Patch from Daniel Pinto. Closes ticket 40047.
2505 - Consider an HTTP 301 response to be an error (like a 404) when
2506 processing a directory response. Closes ticket 40053.
2507 - Log directory fetch statistics as a single line. Closes
2509 - Provide more complete descriptions of our connections when logging
2510 about them. Closes ticket 40041.
2511 - When describing a relay in the logs, we now include its ed25519
2512 identity. Closes ticket 22668.
2514 o Minor features (onion services):
2515 - Only overwrite an onion service's existing hostname file if its
2516 contents are wrong. This enables read-only onion-service
2517 directories. Resolves ticket 40062. Patch by Neel Chauhan.
2519 o Minor features (pluggable transports):
2520 - Add an OutboundBindAddressPT option to allow users to specify
2521 which IPv4 and IPv6 address pluggable transports should use for
2522 outgoing IP packets. Tor does not have a way to enforce that the
2523 pluggable transport honors this option, so each pluggable transport
2524 needs to implement support on its own. Closes ticket 5304.
2526 o Minor features (relay address tracking):
2527 - We now store relay addresses for OR connections in a more logical
2528 way. Previously we would sometimes overwrite the actual address of
2529 a connection with a "canonical address", and then store the "real
2530 address" elsewhere to remember it. We now track the "canonical
2531 address" elsewhere for the cases where we need it, and leave the
2532 connection's address alone. Closes ticket 33898.
2534 o Minor features (relay):
2535 - If a relay is unable to discover its address, attempt to learn it
2536 from the NETINFO cell. Closes ticket 40022.
2537 - Log immediately when launching a relay self-check. Previously we
2538 would try to log before launching checks, or approximately when we
2539 intended to launch checks, but this tended to be error-prone.
2540 Closes ticket 34137.
2542 o Minor features (relay, address discovery):
2543 - If Address option is not found in torrc, attempt to learn our
2544 address with the configured ORPort address if any. Closes
2547 o Minor features (relay, IPv6):
2548 - Add an AssumeReachableIPv6 option to disable self-checking IPv6
2549 reachability. Closes part of ticket 33224.
2550 - Add new "assume-reachable" and "assume-reachable-ipv6" consensus
2551 parameters to be used in an emergency to tell relays that they
2552 should publish even if they cannot complete their ORPort self-
2553 checks. Closes ticket 34064 and part of 33224.
2554 - Allow relays to send IPv6-only extend cells. Closes ticket 33222.
2555 - Declare support for the Relay=3 subprotocol version. Closes
2557 - When launching IPv6 ORPort self-test circuits, make sure that the
2558 second-last hop can initiate an IPv6 extend. Closes ticket 33222.
2560 o Minor features (specification update):
2561 - Several fields in microdescriptors, router descriptors, and
2562 consensus documents that were formerly optional are now required.
2563 Implements proposal 315; closes ticket 40132.
2565 o Minor features (state management):
2566 - When loading the state file, remove entries from the statefile
2567 that have been obsolete for a long time. Ordinarily Tor preserves
2568 unrecognized entries in order to keep forward-compatibility, but
2569 these entries have not actually been used in any release since
2570 before 0.3.5.x. Closes ticket 40137.
2572 o Minor features (statistics, ipv6):
2573 - Relays now publish IPv6-specific counts of single-direction versus
2574 bidirectional relay connections. Closes ticket 33264.
2575 - Relays now publish their IPv6 read and write statistics over time,
2576 if statistics are enabled. Closes ticket 33263.
2578 o Minor features (subprotocol versions):
2579 - Tor no longer allows subprotocol versions larger than 63.
2580 Previously version numbers up to UINT32_MAX were allowed, which
2581 significantly complicated our code. Implements proposal 318;
2582 closes ticket 40133.
2583 - Use the new limitations on subprotocol versions due to proposal
2584 318 to simplify our implementation. Part of ticket 40133.
2586 o Minor features (testing configuration):
2587 - The TestingTorNetwork option no longer implicitly sets
2588 AssumeReachable to 1. This change allows us to test relays' self-
2589 testing mechanisms, and to test authorities' relay-testing
2590 functionality. Closes ticket 34446.
2592 o Minor features (testing):
2593 - Added unit tests for channel_matches_target_addr_for_extend().
2594 Closes Ticket 33919. Patch by MrSquanchee.
2596 o Minor features (tests, v2 onion services):
2597 - Fix a rendezvous cache unit test that was triggering an underflow
2598 on the global rend cache allocation. Fixes bug 40125; bugfix
2600 - Fix another rendezvous cache unit test that was triggering an
2601 underflow on the global rend cache allocation. Fixes bug 40126;
2602 bugfix on 0.2.8.1-alpha.
2604 o Minor bugfixes (circuit padding):
2605 - When circpad_send_padding_cell_for_callback is called,
2606 `is_padding_timer_scheduled` flag was not reset. Now it is set to
2607 0 at the top of that function. Fixes bug 32671; bugfix
2609 - Add a per-circuit padding machine instance counter, so we can
2610 differentiate between shutdown requests for old machines on a
2611 circuit. Fixes bug 30992; bugfix on 0.4.1.1-alpha.
2612 - Add the ability to keep circuit padding machines if they match a
2613 set of circuit states or purposes. This allows us to have machines
2614 that start up under some conditions but don't shut down under
2615 others. We now use this mask to avoid starting up introduction
2616 circuit padding again after the machines have already completed.
2617 Fixes bug 32040; bugfix on 0.4.1.1-alpha.
2619 o Minor bugfixes (compatibility):
2620 - Strip '\r' characters when reading text files on Unix platforms.
2621 This should resolve an issue where a relay operator migrates a
2622 relay from Windows to Unix, but does not change the line ending of
2623 Tor's various state files to match the platform, and the CRLF line
2624 endings from Windows end up leaking into other files such as the
2625 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
2627 o Minor bugfixes (compilation):
2628 - Fix compiler warnings that would occur when building with
2629 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
2630 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
2631 - Resolve a compilation warning that could occur in
2632 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2634 o Minor bugfixes (configuration):
2635 - Fix bug where %including a pattern ending with */ would include
2636 files and folders (instead of folders only) in versions of glibc <
2637 2.19. Fixes bug 40141; bugfix on 0.4.5.0-alpha-dev. Patch by
2640 o Minor bugfixes (control port):
2641 - Make sure we send the SOCKS request address in relay begin cells
2642 when a stream is attached with the purpose
2643 CIRCUIT_PURPOSE_CONTROLLER. Fixes bug 33124; bugfix on 0.0.5.
2644 Patch by Neel Chauhan.
2646 o Minor bugfixes (logging):
2647 - Remove a debug logging statement that uselessly spammed the logs.
2648 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2649 - When logging a rate-limited message about how many messages have
2650 been suppressed in the last N seconds, give an accurate value for
2651 N, rounded up to the nearest minute. Previously we would report
2652 the size of the rate-limiting interval, regardless of when the
2653 messages started to occur. Fixes bug 19431; bugfix
2656 o Minor bugfixes (relay configuration, crash):
2657 - Avoid a fatal assert() when failing to create a listener
2658 connection for an address that was in use. Fixes bug 40073; bugfix
2661 o Minor bugfixes (rust, protocol versions):
2662 - Declare support for the onion service introduction point denial of
2663 service extensions when building with Rust. Fixes bug 34248;
2664 bugfix on 0.4.2.1-alpha.
2665 - Make Rust protocol version support checks consistent with the
2666 undocumented error behavior of the corresponding C code. Fixes bug
2667 34251; bugfix on 0.3.3.5-rc.
2669 o Minor bugfixes (self-testing):
2670 - When receiving an incoming circuit, only accept it as evidence
2671 that we are reachable if the declared address of its channel is
2672 the same address we think that we have. Otherwise, it could be
2673 evidence that we're reachable on some other address. Fixes bug
2674 20165; bugfix on 0.1.0.1-rc.
2676 o Minor bugfixes (spec conformance):
2677 - Use the correct key type when generating signing->link
2678 certificates. Fixes bug 40124; bugfix on 0.2.7.2-alpha.
2680 o Minor bugfixes (subprotocol versions):
2681 - Consistently reject extra commas, instead of only rejecting
2682 leading commas. Fixes bug 27194; bugfix on 0.2.9.4-alpha.
2683 - In summarize_protover_flags(), treat empty strings the same as
2684 NULL. This prevents protocols_known from being set. Previously, we
2685 treated empty strings as normal strings, which led to
2686 protocols_known being set. Fixes bug 34232; bugfix on
2687 0.3.3.2-alpha. Patch by Neel Chauhan.
2689 o Minor bugfixes (v2 onion services):
2690 - For HSFETCH commands on v2 onion services addresses, check the
2691 length of bytes decoded, not the base32 length. Fixes bug 34400;
2692 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2694 o Code simplification and refactoring:
2695 - Add and use a set of functions to perform down-casts on constant
2696 connection and channel pointers. Closes ticket 40046.
2697 - Refactor our code that logs descriptions of connections, channels,
2698 and the peers on them, to use a single call path. This change
2699 enables us to refactor the data types that they use, and eliminates
2700 many confusing usages of those types. Closes ticket 40041.
2701 - Refactor some common node selection code into a single function.
2702 Closes ticket 34200.
2703 - Remove the now-redundant 'outbuf_flushlen' field from our
2704 connection type. It was previously used for an older version of
2705 our rate-limiting logic. Closes ticket 33097.
2706 - Rename "fascist_firewall_*" identifiers to "reachable_addr_*"
2707 instead, for consistency with other code. Closes ticket 18106.
2708 - Rename functions about "advertised" ports which are not in fact
2709 guaranteed to return the ports that have been advertised. Closes
2711 - Split implementation of several command line options from
2712 options_init_from_torrc into smaller isolated functions. Patch by
2713 Daniel Pinto. Closes ticket 40102.
2714 - When an extend cell is missing an IPv4 or IPv6 address, fill in
2715 the address from the extend info. This is similar to what was done
2716 in ticket 33633 for ed25519 keys. Closes ticket 33816. Patch by
2719 o Deprecated features:
2720 - The "non-builtin" argument to the "--dump-config" command is now
2721 deprecated. When it works, it behaves the same as "short", which
2722 you should use instead. Closes ticket 33398.
2725 - Replace URLs from our old bugtracker so that they refer to the new
2726 bugtracker and wiki. Closes ticket 40101.
2729 - We no longer ship or build a "tor.service" file for use with
2730 systemd. No distribution included this script unmodified, and we
2731 don't have the expertise ourselves to maintain this in a way that
2732 all the various systemd-based distributions can use. Closes
2734 - We no longer ship support for the Android logging API. Modern
2735 versions of Android can use the syslog API instead. Closes
2737 - The "optimistic data" feature is now always on; there is no longer
2738 an option to disable it from the torrc file or from the consensus
2739 directory. Closes part of 40139.
2740 - The "usecreatefast" network parameter is now removed; there is no
2741 longer an option for authorities to turn it off. Closes part
2745 - Add unit tests for bandwidth statistics manipulation functions.
2746 Closes ticket 33812. Patch by MrSquanchee.
2748 o Code simplification and refactoring (autoconf):
2749 - Remove autoconf checks for unused funcs and headers. Closes ticket
2750 31699; Patch by @bduszel
2752 o Code simplification and refactoring (maintainer scripts):
2753 - Disable by default the pre-commit hook. Use the environment
2754 variable TOR_EXTRA_PRE_COMMIT_CHECKS in order to run it.
2755 Furthermore, stop running practracker in the pre-commit hook and
2756 make check-local. Closes ticket 40019.
2758 o Code simplification and refactoring (relay address):
2759 - Most of IPv4 representation was using "uint32_t". It has now been
2760 moved to use the internal "tor_addr_t" interface instead. This is
2761 so we can properly integrate IPv6 along IPv4 with common
2762 interfaces. Closes ticket 40043.
2764 o Documentation (manual page):
2765 - Move them from doc/ to doc/man/. Closes ticket 40044.
2766 - Describe the status of the "Sandbox" option more accurately. It is
2767 no longer "experimental", but it _is_ dependent on kernel and libc
2768 versions. Closes ticket 23378.
2770 o Documentation (tracing):
2771 - Document in depth the circuit subsystem trace events in the new
2772 doc/tracing/EventsCircuit.md. Closes ticket 40036.
2775 Changes in version 0.4.4.5 - 2020-09-15
2776 Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This
2777 series improves our guard selection algorithms, adds v3 onion balance
2778 support, improves the amount of code that can be disabled when running
2779 without relay support, and includes numerous small bugfixes and
2780 enhancements. It also lays the ground for some IPv6 features that
2781 we'll be developing more in the next (0.4.5) series.
2783 Per our support policy, we support each stable release series for nine
2784 months after its first stable release, or three months after the first
2785 stable release of the next series: whichever is longer. This means
2786 that 0.4.4.x will be supported until around June 2021--or later, if
2787 0.4.5.x is later than anticipated.
2789 Note also that support for 0.4.2.x has just ended; support for 0.4.3
2790 will continue until Feb 15, 2021. We still plan to continue supporting
2791 0.3.5.x, our long-term stable series, until Feb 2022.
2793 Below are the changes since 0.4.4.4-rc. For a complete list of changes
2794 since 0.4.3.6, see the ReleaseNotes file.
2796 o Major bugfixes (onion services, DoS):
2797 - Correct handling of parameters for the onion service DoS defense.
2798 Previously, the consensus parameters for the onion service DoS
2799 defenses were overwriting the parameters set by the service
2800 operator using HiddenServiceEnableIntroDoSDefense. Fixes bug
2801 40109; bugfix on 0.4.2.1-alpha.
2803 o Major bugfixes (stats, onion services):
2804 - Fix a bug where we were undercounting the Tor network's total
2805 onion service traffic, by ignoring any traffic originating from
2806 clients. Now we count traffic from both clients and services.
2807 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
2809 o Minor features (control port):
2810 - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an
2811 onion service, display it when we use ONION_CLIENT_AUTH_VIEW.
2812 Closes ticket 40089. Patch by Neel Chauhan.
2814 o Minor features (denial-of-service memory limiter):
2815 - Allow the user to configure even lower values for the
2816 MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB,
2817 when previously the minimum was 256 MB. On clients, there is no
2818 minimum. Relays and clients will both warn if the value is set so
2819 low that Tor is likely to stop working. Closes ticket 24308.
2821 o Minor features (tests):
2822 - Our "make check" target now runs the unit tests in 8 parallel
2823 chunks. Doing this speeds up hardened CI builds by more than a
2824 factor of two. Closes ticket 40098.
2826 o Minor bugfixes (guard selection algorithm):
2827 - Avoid needless guard-related warning when upgrading from 0.4.3 to
2828 0.4.4. Fixes bug 40105; bugfix on 0.4.4.1-alpha.
2830 o Minor bugfixes (tests):
2831 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2832 on its own. Previously, it would exit with an error. Fixes bug
2833 40099; bugfix on 0.2.8.1-alpha.
2836 Changes in version 0.4.4.3-alpha - 2020-07-27
2837 Tor 0.4.4.3-alpha fixes several annoyances in previous versions,
2838 including one affecting NSS users, and several affecting the Linux
2841 o Major features (fallback directory list):
2842 - Replace the 148 fallback directories originally included in Tor
2843 0.4.1.4-rc (of which around 105 are still functional) with a list
2844 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2846 o Major bugfixes (NSS):
2847 - When running with NSS enabled, make sure that NSS knows to expect
2848 nonblocking sockets. Previously, we set our TCP sockets as
2849 nonblocking, but did not tell NSS, which in turn could lead to
2850 unexpected blocking behavior. Fixes bug 40035; bugfix
2853 o Minor bugfixes (linux seccomp2 sandbox):
2854 - Fix a regression on sandboxing rules for the openat() syscall. The
2855 fix for bug 25440 fixed the problem on systems with glibc >= 2.27
2856 but broke with versions of glibc. We now choose a rule based on
2857 the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
2859 - Makes the seccomp sandbox allow the correct syscall for opendir
2860 according to the running glibc version. This fixes crashes when
2861 reloading torrc with sandbox enabled when running on glibc 2.15 to
2862 2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
2865 o Minor bugfixes (relay, usability):
2866 - Adjust the rules for when to warn about having too many
2867 connections to other relays. Previously we'd tolerate up to 1.5
2868 connections per relay on average. Now we tolerate more connections
2869 for directory authorities, and raise the number of total
2870 connections we need to see before we warn. Fixes bug 33880; bugfix
2874 - Replace most http:// URLs in our code and documentation with
2875 https:// URLs. (We have left unchanged the code in src/ext/, and
2876 the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.
2879 - Our "check-local" test target no longer tries to use the
2880 Coccinelle semantic patching tool parse all the C files. While it
2881 is a good idea to try to make sure Coccinelle works on our C
2882 before we run a Coccinelle patch, doing so on every test run has
2883 proven to be disruptive. You can still run this tool manually with
2884 "make check-cocci". Closes ticket 40030.
2887 Changes in version 0.3.5.11 - 2020-07-09
2888 Tor 0.3.5.11 backports fixes from later tor releases, including several
2889 usability, portability, and reliability fixes.
2891 This release also fixes TROVE-2020-001, a medium-severity denial of
2892 service vulnerability affecting all versions of Tor when compiled with
2893 the NSS encryption library. (This is not the default configuration.)
2894 Using this vulnerability, an attacker could cause an affected Tor
2895 instance to crash remotely. This issue is also tracked as CVE-2020-
2896 15572. Anybody running a version of Tor built with the NSS library
2897 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
2900 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
2901 - Fix a crash due to an out-of-bound memory access when Tor is
2902 compiled with NSS support. Fixes bug 33119; bugfix on
2903 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
2906 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
2907 - Fix a bug that was preventing DoS defenses from running on bridges
2908 with a pluggable transport. Previously, the DoS subsystem was not
2909 given the transport name of the client connection, thus failed to
2910 find the GeoIP cache entry for that client address. Fixes bug
2911 33491; bugfix on 0.3.3.2-alpha.
2913 o Minor features (testing, backport from 0.4.3.4-rc):
2914 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
2915 variable to specify a list of space-separated test cases that
2916 should not be executed. We will use this to disable certain tests
2917 that are failing on Appveyor because of mismatched OpenSSL
2918 libraries. Part of ticket 33643.
2920 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
2921 - Use the correct 64-bit printf format when compiling with MINGW on
2922 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
2924 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
2925 - Warn if the ContactInfo field is not set, and tell the relay
2926 operator that not having a ContactInfo field set might cause their
2927 relay to get rejected in the future. Fixes bug 33361; bugfix
2930 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
2931 - Resume use of preemptively-built circuits when UseEntryGuards is set
2932 to 0. We accidentally disabled this feature with that config
2933 setting, leading to slower load times. Fixes bug 34303; bugfix
2936 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
2937 - Avoid compiler warnings from Clang 10 related to the use of GCC-
2938 style "/* falls through */" comments. Both Clang and GCC allow
2939 __attribute__((fallthrough)) instead, so that's what we're using
2940 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
2942 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
2943 - Fix a compiler warning on platforms with 32-bit time_t values.
2944 Fixes bug 40028; bugfix on 0.3.2.8-rc.
2946 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
2947 - When starting Tor any time after the first time in a process,
2948 register the thread in which it is running as the main thread.
2949 Previously, we only did this on Windows, which could lead to bugs
2950 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
2953 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
2954 - When reading PEM-encoded key data, tolerate CRLF line-endings even
2955 if we are not running on Windows. Previously, non-Windows hosts
2956 would reject these line-endings in certain positions, making
2957 certain key files hard to move from one host to another. Fixes bug
2958 33032; bugfix on 0.3.5.1-alpha.
2960 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
2961 - Downgrade a noisy log message that could occur naturally when
2962 receiving an extrainfo document that we no longer want. Fixes bug
2963 16016; bugfix on 0.2.6.3-alpha.
2965 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
2966 - Remove a BUG() warning that would cause a stack trace if an onion
2967 service descriptor was freed while we were waiting for a
2968 rendezvous circuit to complete. Fixes bug 28992; bugfix
2971 o Testing (CI, backport from 0.4.3.4-rc):
2972 - In our Appveyor Windows CI, copy required DLLs to test and app
2973 directories, before running tor's tests. This ensures that tor.exe
2974 and test*.exe use the correct version of each DLL. This fix is not
2975 required, but we hope it will avoid DLL search issues in future.
2976 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
2977 - On Appveyor, skip the crypto/openssl_version test, which is
2978 failing because of a mismatched library installation. Fix
2982 Changes in version 0.4.2.8 - 2020-07-09
2983 Tor 0.4.2.8 backports various fixes from later releases, including
2984 several that affect usability and portability.
2986 This release also fixes TROVE-2020-001, a medium-severity denial of
2987 service vulnerability affecting all versions of Tor when compiled with
2988 the NSS encryption library. (This is not the default configuration.)
2989 Using this vulnerability, an attacker could cause an affected Tor
2990 instance to crash remotely. This issue is also tracked as CVE-2020-
2991 15572. Anybody running a version of Tor built with the NSS library
2992 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
2995 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
2996 - Fix a crash due to an out-of-bound memory access when Tor is
2997 compiled with NSS support. Fixes bug 33119; bugfix on
2998 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3001 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
3002 - Fix a bug that was preventing DoS defenses from running on bridges
3003 with a pluggable transport. Previously, the DoS subsystem was not
3004 given the transport name of the client connection, thus failed to
3005 find the GeoIP cache entry for that client address. Fixes bug
3006 33491; bugfix on 0.3.3.2-alpha.
3008 o Minor feature (sendme, flow control, backport form 0.4.3.4-rc):
3009 - Default to sending SENDME version 1 cells. (Clients are already
3010 sending these, because of a consensus parameter telling them to do
3011 so: this change only affects what clients would do if the
3012 consensus didn't contain a recommendation.) Closes ticket 33623.
3014 o Minor features (diagnostic, backport from 0.4.3.3-alpha):
3015 - Improve assertions and add some memory-poisoning code to try to
3016 track down possible causes of a rare crash (32564) in the EWMA
3017 code. Closes ticket 33290.
3019 o Minor features (testing, backport from 0.4.3.4-rc):
3020 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3021 variable to specify a list of space-separated test cases that
3022 should not be executed. We will use this to disable certain tests
3023 that are failing on Appveyor because of mismatched OpenSSL
3024 libraries. Part of ticket 33643.
3026 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3027 - Use the correct 64-bit printf format when compiling with MINGW on
3028 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3030 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
3031 - Warn if the ContactInfo field is not set, and tell the relay
3032 operator that not having a ContactInfo field set might cause their
3033 relay to get rejected in the future. Fixes bug 33361; bugfix
3036 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3037 - Resume use of preemptively-built circuits when UseEntryGuards is set
3038 to 0. We accidentally disabled this feature with that config
3039 setting, leading to slower load times. Fixes bug 34303; bugfix
3042 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
3043 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3044 style "/* falls through */" comments. Both Clang and GCC allow
3045 __attribute__((fallthrough)) instead, so that's what we're using
3046 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3047 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
3050 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3051 - Fix a compiler warning on platforms with 32-bit time_t values.
3052 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3054 o Minor bugfixes (controller protocol, backport from 0.4.3.2-alpha):
3055 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
3056 report them as SIGNAL events. Previously we would log a bug
3057 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
3059 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
3060 - When starting Tor any time after the first time in a process,
3061 register the thread in which it is running as the main thread.
3062 Previously, we only did this on Windows, which could lead to bugs
3063 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
3066 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
3067 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3068 if we are not running on Windows. Previously, non-Windows hosts
3069 would reject these line-endings in certain positions, making
3070 certain key files hard to move from one host to another. Fixes bug
3071 33032; bugfix on 0.3.5.1-alpha.
3073 o Minor bugfixes (logging, backport from 0.4.3.2-rc):
3074 - When logging a bug, do not say "Future instances of this warning
3075 will be silenced" unless we are actually going to silence them.
3076 Previously we would say this whenever a BUG() check failed in the
3077 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
3079 o Minor bugfixes (logging, backport from 0.4.3.4-rc):
3080 - Flush stderr, stdout, and file logs during shutdown, if supported
3081 by the OS. This change helps make sure that any final logs are
3082 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
3084 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3085 - Downgrade a noisy log message that could occur naturally when
3086 receiving an extrainfo document that we no longer want. Fixes bug
3087 16016; bugfix on 0.2.6.3-alpha.
3089 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
3090 - Remove a BUG() warning that would cause a stack trace if an onion
3091 service descriptor was freed while we were waiting for a
3092 rendezvous circuit to complete. Fixes bug 28992; bugfix
3095 o Testing (CI, backport from 0.4.3.4-rc):
3096 - In our Appveyor Windows CI, copy required DLLs to test and app
3097 directories, before running tor's tests. This ensures that tor.exe
3098 and test*.exe use the correct version of each DLL. This fix is not
3099 required, but we hope it will avoid DLL search issues in future.
3100 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3101 - On Appveyor, skip the crypto/openssl_version test, which is
3102 failing because of a mismatched library installation. Fix
3106 Changes in version 0.4.3.6 - 2020-07-09
3107 Tor 0.4.3.6 backports several bugfixes from later releases, including
3108 some affecting usability.
3110 This release also fixes TROVE-2020-001, a medium-severity denial of
3111 service vulnerability affecting all versions of Tor when compiled with
3112 the NSS encryption library. (This is not the default configuration.)
3113 Using this vulnerability, an attacker could cause an affected Tor
3114 instance to crash remotely. This issue is also tracked as CVE-2020-
3115 15572. Anybody running a version of Tor built with the NSS library
3116 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3119 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3120 - Fix a crash due to an out-of-bound memory access when Tor is
3121 compiled with NSS support. Fixes bug 33119; bugfix on
3122 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3125 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3126 - Use the correct 64-bit printf format when compiling with MINGW on
3127 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3129 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3130 - Resume use of preemptively-built circuits when UseEntryGuards is set
3131 to 0. We accidentally disabled this feature with that config
3132 setting, leading to slower load times. Fixes bug 34303; bugfix
3135 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3136 - Fix a compiler warning on platforms with 32-bit time_t values.
3137 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3139 o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha):
3140 - Fix a startup crash when tor is compiled with --enable-nss and
3141 sandbox support is enabled. Fixes bug 34130; bugfix on
3142 0.3.5.1-alpha. Patch by Daniel Pinto.
3144 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3145 - Downgrade a noisy log message that could occur naturally when
3146 receiving an extrainfo document that we no longer want. Fixes bug
3147 16016; bugfix on 0.2.6.3-alpha.
3149 o Minor bugfixes (manual page, backport from 0.4.4.1-alpha):
3150 - Update the man page to reflect that MinUptimeHidServDirectoryV2
3151 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
3153 o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha):
3154 - Prevent an assert() that would occur when cleaning the client
3155 descriptor cache, and attempting to close circuits for a non-
3156 decrypted descriptor (lacking client authorization). Fixes bug
3157 33458; bugfix on 0.4.2.1-alpha.
3159 o Minor bugfixes (portability, backport from 0.4.4.1-alpha):
3160 - Fix a portability error in the configure script, where we were
3161 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
3163 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
3164 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
3165 descriptors, when the IPv6 port was configured as "auto". Fixes
3166 bug 32588; bugfix on 0.2.3.9-alpha.
3168 o Documentation (backport from 0.4.4.1-alpha):
3169 - Fix several doxygen warnings related to imbalanced groups. Closes
3173 Changes in version 0.4.4.2-alpha - 2020-07-09
3174 This is the second alpha release in the 0.4.4.x series. It fixes a few
3175 bugs in the previous release, and solves a few usability,
3176 compatibility, and portability issues.
3178 This release also fixes TROVE-2020-001, a medium-severity denial of
3179 service vulnerability affecting all versions of Tor when compiled with
3180 the NSS encryption library. (This is not the default configuration.)
3181 Using this vulnerability, an attacker could cause an affected Tor
3182 instance to crash remotely. This issue is also tracked as CVE-2020-
3183 15572. Anybody running a version of Tor built with the NSS library
3184 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3187 o Major bugfixes (NSS, security):
3188 - Fix a crash due to an out-of-bound memory access when Tor is
3189 compiled with NSS support. Fixes bug 33119; bugfix on
3190 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3193 o Minor features (bootstrap reporting):
3194 - Report more detailed reasons for bootstrap failure when the
3195 failure happens due to a TLS error. Previously we would just call
3196 these errors "MISC" when they happened during read, and "DONE"
3197 when they happened during any other TLS operation. Closes
3200 o Minor features (directory authority):
3201 - Authorities now recommend the protocol versions that are supported
3202 by Tor 0.3.5 and later. (Earlier versions of Tor have been
3203 deprecated since January of this year.) This recommendation will
3204 cause older clients and relays to give a warning on startup, or
3205 when they download a consensus directory. Closes ticket 32696.
3207 o Minor features (entry guards):
3208 - Reinstate support for GUARD NEW/UP/DOWN control port events.
3209 Closes ticket 40001.
3211 o Minor features (linux seccomp2 sandbox, portability):
3212 - Allow Tor to build on platforms where it doesn't know how to
3213 report which syscall caused the linux seccomp2 sandbox to fail.
3214 This change should make the sandbox code more portable to less
3215 common Linux architectures. Closes ticket 34382.
3216 - Permit the unlinkat() syscall, which some Libc implementations use
3217 to implement unlink(). Closes ticket 33346.
3219 o Minor bugfix (CI, Windows):
3220 - Use the correct 64-bit printf format when compiling with MINGW on
3221 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3223 o Minor bugfix (onion service v3 client):
3224 - Remove a BUG() warning that could occur naturally. Fixes bug
3225 34087; bugfix on 0.3.2.1-alpha.
3227 o Minor bugfix (SOCKS, onion service client):
3228 - Detect v3 onion service addresses of the wrong length when
3229 returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix
3232 o Minor bugfixes (compiler warnings):
3233 - Fix a compiler warning on platforms with 32-bit time_t values.
3234 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3236 o Minor bugfixes (control port, onion service):
3237 - Consistently use 'address' in "Invalid v3 address" response to
3238 ONION_CLIENT_AUTH commands. Previously, we would sometimes say
3239 'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha.
3241 o Minor bugfixes (logging):
3242 - Downgrade a noisy log message that could occur naturally when
3243 receiving an extrainfo document that we no longer want. Fixes bug
3244 16016; bugfix on 0.2.6.3-alpha.
3246 o Minor bugfixes (onion services v3):
3247 - Avoid a non-fatal assertion failure in certain edge-cases when
3248 opening an intro circuit as a client. Fixes bug 34084; bugfix
3251 o Deprecated features (onion service v2):
3252 - Add a deprecation warning for version 2 onion services. Closes
3255 o Removed features (IPv6, revert):
3256 - Revert the change in the default value of ClientPreferIPv6OrPort:
3257 it breaks the torsocks use case. The SOCKS resolve command has no
3258 mechanism to ask for a specific address family (v4 or v6), and so
3259 prioritizing IPv6 when an IPv4 address is requested on the SOCKS
3260 interface resulted in a failure. Tor Browser explicitly sets
3261 PreferIPv6, so this should not affect the majority of our users.
3262 Closes ticket 33796; bugfix on 0.4.4.1-alpha.
3265 Changes in version 0.4.4.1-alpha - 2020-06-16
3266 This is the first alpha release in the 0.4.4.x series. It improves
3267 our guard selection algorithms, improves the amount of code that
3268 can be disabled when running without relay support, and includes numerous
3269 small bugfixes and enhancements. It also lays the ground for some IPv6
3270 features that we'll be developing more in the next (0.4.5) series.
3272 Here are the changes since 0.4.3.5.
3274 o Major features (Proposal 310, performance + security):
3275 - Implements Proposal 310, "Bandaid on guard selection". Proposal
3276 310 solves load-balancing issues with older versions of the guard
3277 selection algorithm, and improves its security. Under this new
3278 algorithm, a newly selected guard never becomes Primary unless all
3279 previously sampled guards are unreachable. Implements
3280 recommendation from 32088. (Proposal 310 is linked to the CLAPS
3281 project researching optimal client location-aware path selections.
3282 This project is a collaboration between the UCLouvain Crypto Group,
3283 the U.S. Naval Research Laboratory, and Princeton University.)
3285 o Major features (IPv6, relay):
3286 - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol
3287 warning if the IPv4 or IPv6 address is an internal address, and
3288 internal addresses are not allowed. But continue to use the other
3289 address, if it is valid. Closes ticket 33817.
3290 - If a relay can extend over IPv4 and IPv6, and both addresses are
3291 provided, it chooses between them uniformly at random. Closes
3293 - Re-use existing IPv6 connections for circuit extends. Closes
3295 - Relays may extend circuits over IPv6, if the relay has an IPv6
3296 ORPort, and the client supplies the other relay's IPv6 ORPort in
3297 the EXTEND2 cell. IPv6 extends will be used by the relay IPv6
3298 ORPort self-tests in 33222. Closes ticket 33817.
3300 o Major features (v3 onion services):
3301 - Allow v3 onion services to act as OnionBalance backend instances,
3302 by using the HiddenServiceOnionBalanceInstance torrc option.
3303 Closes ticket 32709.
3305 o Minor feature (developer tools):
3306 - Add a script to help check the alphabetical ordering of option
3307 names in the manual page. Closes ticket 33339.
3309 o Minor feature (onion service client, SOCKS5):
3310 - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back
3311 new type of onion service connection failures. The semantics of
3312 these error codes are documented in proposal 309. Closes
3315 o Minor feature (onion service v3):
3316 - If a service cannot upload its descriptor(s), log why at INFO
3317 level. Closes ticket 33400; bugfix on 0.3.2.1-alpha.
3319 o Minor feature (python scripts):
3320 - Stop assuming that /usr/bin/python exists. Instead of using a
3321 hardcoded path in scripts that still use Python 2, use
3322 /usr/bin/env, similarly to the scripts that use Python 3. Fixes
3323 bug 33192; bugfix on 0.4.2.
3325 o Minor features (client-only compilation):
3326 - Disable more code related to the ext_orport protocol when
3327 compiling without support for relay mode. Closes ticket 33368.
3328 - Disable more of our self-testing code when support for relay mode
3329 is disabled. Closes ticket 33370.
3331 o Minor features (code safety):
3332 - Check for failures of tor_inet_ntop() and tor_inet_ntoa()
3333 functions in DNS and IP address processing code, and adjust
3334 codepaths to make them less likely to crash entire Tor instances.
3335 Resolves issue 33788.
3337 o Minor features (compilation size):
3338 - Most server-side DNS code is now disabled when building without
3339 support for relay mode. Closes ticket 33366.
3341 o Minor features (continuous integration):
3342 - Run unit-test and integration test (Stem, Chutney) jobs with
3343 ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor.
3344 Resolves ticket 32143.
3346 o Minor features (control port):
3347 - Return a descriptive error message from the 'GETINFO status/fresh-
3348 relay-descs' command on the control port. Previously, we returned
3349 a generic error of "Error generating descriptor". Closes ticket
3350 32873. Patch by Neel Chauhan.
3352 o Minor features (developer tooling):
3353 - Refrain from listing all .a files that are generated by the Tor
3354 build in .gitignore. Add a single wildcard *.a entry that covers
3355 all of them for present and future. Closes ticket 33642.
3356 - Add a script ("git-install-tools.sh") to install git hooks and
3357 helper scripts. Closes ticket 33451.
3359 o Minor features (directory authority, shared random):
3360 - Refactor more authority-only parts of the shared-random scheduling
3361 code to reside in the dirauth module, and to be disabled when
3362 compiling with --disable-module-dirauth. Closes ticket 33436.
3364 o Minor features (directory):
3365 - Remember the number of bytes we have downloaded for each directory
3366 purpose while bootstrapping, and while fully bootstrapped. Log
3367 this information as part of the heartbeat message. Closes
3370 o Minor features (IPv6 support):
3371 - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above
3372 changes and tor_addr_is_null(). Closes ticket 33679. Patch
3374 - Allow clients and relays to send dual-stack and IPv6-only EXTEND2
3375 cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays.
3376 Closes ticket 33901.
3378 o Minor features (logging):
3379 - When trying to find our own address, add debug-level logging to
3380 report the sources of candidate addresses. Closes ticket 32888.
3382 o Minor features (testing, architecture):
3383 - Our test scripts now double-check that subsystem initialization
3384 order is consistent with the inter-module dependencies established
3385 by our .may_include files. Implements ticket 31634.
3386 - Initialize all subsystems at the beginning of our unit test
3387 harness, to avoid crashes due to uninitialized subsystems. Follow-
3388 up from ticket 33316.
3390 o Minor features (v3 onion services):
3391 - Add v3 onion service status to the dumpstats() call which is
3392 triggered by a SIGUSR1 signal. Previously, we only did v2 onion
3393 services. Closes ticket 24844. Patch by Neel Chauhan.
3395 o Minor features (windows):
3396 - Add support for console control signals like Ctrl+C in Windows.
3397 Closes ticket 34211. Patch from Damon Harris (TheDcoder).
3399 o Minor bugfix (onion service v3):
3400 - Prevent an assert() that would occur when cleaning the client
3401 descriptor cache, and attempting to close circuits for a non-
3402 decrypted descriptor (lacking client authorization). Fixes bug
3403 33458; bugfix on 0.4.2.1-alpha.
3405 o Minor bugfix (refactoring):
3406 - Lift circuit_build_times_disabled() out of the
3407 circuit_expire_building() loop, to save CPU time when there are
3408 many circuits open. Fixes bug 33977; bugfix on 0.3.5.9.
3410 o Minor bugfixes (client performance):
3411 - Resume use of preemptively-built circuits when UseEntryGuards is set
3412 to 0. We accidentally disabled this feature with that config
3413 setting, leading to slower load times. Fixes bug 34303; bugfix
3416 o Minor bugfixes (directory authorities):
3417 - Directory authorities now reject votes that arrive too late. In
3418 particular, once an authority has started fetching missing votes,
3419 it no longer accepts new votes posted by other authorities. This
3420 change helps prevent a consensus split, where only some authorities
3421 have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha.
3423 o Minor bugfixes (git scripts):
3424 - Stop executing the checked-out pre-commit hook from the pre-push
3425 hook. Instead, execute the copy in the user's git directory. Fixes
3426 bug 33284; bugfix on 0.4.1.1-alpha.
3428 o Minor bugfixes (initialization):
3429 - Initialize the subsystems in our code in an order more closely
3430 corresponding to their dependencies, so that every system is
3431 initialized before the ones that (theoretically) depend on it.
3432 Fixes bug 33316; bugfix on 0.4.0.1-alpha.
3434 o Minor bugfixes (IPv4, relay):
3435 - Check for invalid zero IPv4 addresses and ports when sending and
3436 receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha.
3438 o Minor bugfixes (IPv6, relay):
3439 - Consider IPv6 addresses when checking if a connection is
3440 canonical. In 17604, relays assumed that a remote relay could
3441 consider an IPv6 connection canonical, but did not set the
3442 canonical flag on their side of the connection. Fixes bug 33899;
3443 bugfix on 0.3.1.1-alpha.
3444 - Log IPv6 addresses on connections where this relay is the
3445 responder. Previously, responding relays would replace the remote
3446 IPv6 address with the IPv4 address from the consensus. Fixes bug
3447 33899; bugfix on 0.3.1.1-alpha.
3449 o Minor bugfixes (linux seccomp sandbox nss):
3450 - Fix a startup crash when tor is compiled with --enable-nss and
3451 sandbox support is enabled. Fixes bug 34130; bugfix on
3452 0.3.5.1-alpha. Patch by Daniel Pinto.
3454 o Minor bugfixes (logging, testing):
3455 - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL
3456 and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE()
3457 used to log a non-fatal warning, regardless of the debugging
3458 mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha.
3460 o Minor bugfixes (logs):
3461 - Remove surprising empty line in the INFO-level log about circuit
3462 build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha.
3464 o Minor bugfixes (mainloop):
3465 - Better guard against growing a buffer past its maximum 2GB in
3466 size. Fixes bug 33131; bugfix on 0.3.0.4-rc.
3468 o Minor bugfixes (manual page):
3469 - Update the man page to reflect that MinUptimeHidServDirectoryV2
3470 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
3472 o Minor bugfixes (onion service v3, client):
3473 - Remove a BUG() that was causing a stacktrace when a descriptor
3474 changed at an unexpected time. Fixes bug 28992; bugfix
3477 o Minor bugfixes (onion service, logging):
3478 - Fix a typo in a log message PublishHidServDescriptors is set to 0.
3479 Fixes bug 33779; bugfix on 0.3.2.1-alpha.
3481 o Minor bugfixes (portability):
3482 - Fix a portability error in the configure script, where we were
3483 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
3485 o Minor bugfixes (protocol versions):
3486 - Sort tor's supported protocol version lists, as recommended by the
3487 tor directory specification. Fixes bug 33285; bugfix
3490 o Minor bugfixes (relays):
3491 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
3492 descriptors, when the IPv6 port was configured as "auto". Fixes
3493 bug 32588; bugfix on 0.2.3.9-alpha.
3495 o Code simplification and refactoring:
3496 - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like
3497 TOR_ADDR_BUF_LEN but includes enough space for an IP address,
3498 brackets, separating colon, and port number. Closes ticket 33956.
3499 Patch by Neel Chauhan.
3500 - Merge the orconn and ocirc events into the "core" subsystem, which
3501 manages or connections and origin circuits. Previously they were
3502 isolated in subsystems of their own.
3503 - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency
3504 inversion. Closes ticket 33633.
3505 - Move the circuit extend code to the relay module. Split the
3506 circuit extend function into smaller functions. Closes
3508 - Rewrite port_parse_config() to use the default port flags from
3509 port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee.
3510 - Updated comments in 'scheduler.c' to reflect old code changes, and
3511 simplified the scheduler channel state change code. Closes
3515 - Document the limitations of using %include on config files with
3516 seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on
3517 0.3.1.1-alpha. Patch by Daniel Pinto.
3518 - Fix several doxygen warnings related to imbalanced groups. Closes
3522 - Remove the ClientAutoIPv6ORPort option. This option attempted to
3523 randomly choose between IPv4 and IPv6 for client connections, and
3524 wasn't a true implementation of Happy Eyeballs. Often, this option
3525 failed on IPv4-only or IPv6-only connections. Closes ticket 32905.
3526 Patch by Neel Chauhan.
3527 - Stop shipping contrib/dist/rc.subr file, as it is not being used
3528 on FreeBSD anymore. Closes issue 31576.
3531 - Add a basic IPv6 test to "make test-network". This test only runs
3532 when the local machine has an IPv6 stack. Closes ticket 33300.
3533 - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile.
3534 These jobs run the IPv4-only and dual-stack chutney flavours from
3535 test-network-all. Closes ticket 33280.
3536 - Remove a redundant distcheck job. Closes ticket 33194.
3537 - Run the test-network-ipv6 Makefile target in the Travis CI IPv6
3538 chutney job. This job runs on macOS, so it's a bit slow. Closes
3540 - Sort the Travis jobs in order of speed. Putting the slowest jobs
3541 first takes full advantage of Travis job concurrency. Closes
3543 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3544 previously configured to fast_finish (which requires
3545 allow_failure), to speed up the build. Closes ticket 33195.
3546 - Test v3 onion services to tor's mixed IPv4 chutney network. And
3547 add a mixed IPv6 chutney network. These networks are used in the
3548 test-network-all, test-network-ipv4, and test-network-ipv6 make
3549 targets. Closes ticket 33334.
3550 - Use the "bridges+hs-v23" chutney network flavour in "make test-
3551 network". This test requires a recent version of chutney (mid-
3552 February 2020). Closes ticket 28208.
3553 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3554 tool to produce detailed diagnostic output. Closes ticket 32792.
3556 o Code simplification and refactoring (onion service):
3557 - Refactor configuration parsing to use the new config subsystem
3558 code. Closes ticket 33014.
3560 o Code simplification and refactoring (relay address):
3561 - Move a series of functions related to address resolving into their
3562 own files. Closes ticket 33789.
3564 o Documentation (manual page):
3565 - Add cross reference links and a table of contents to the HTML tor
3566 manual page. Closes ticket 33369. Work by Swati Thacker as part of
3567 Google Season of Docs.
3568 - Alphabetize the Denial of Service Mitigation Options, Directory
3569 Authority Server Options, Hidden Service Options, and Testing
3570 Network Options sections of the tor(1) manual page. Closes ticket
3571 33275. Work by Swati Thacker as part of Google Season of Docs.
3572 - Refrain from mentioning nicknames in manpage section for MyFamily
3573 torrc option. Resolves issue 33417.
3574 - Updated the options set by TestingTorNetwork in the manual page.
3575 Closes ticket 33778.
3578 Changes in version 0.4.3.5 - 2020-05-15
3579 Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This
3580 series adds support for building without relay code enabled, and
3581 implements functionality needed for OnionBalance with v3 onion
3582 services. It includes significant refactoring of our configuration and
3583 controller functionality, and fixes numerous smaller bugs and
3586 Per our support policy, we support each stable release series for nine
3587 months after its first stable release, or three months after the first
3588 stable release of the next series: whichever is longer. This means
3589 that 0.4.3.x will be supported until around February 2021--later, if
3590 0.4.4.x is later than anticipated.
3592 Note also that support for 0.4.1.x is about to end on May 20 of this
3593 year; 0.4.2.x will be supported until September 15. We still plan to
3594 continue supporting 0.3.5.x, our long-term stable series, until
3597 Below are the changes since 0.4.3.4-rc. For a complete list of changes
3598 since 0.4.2.6, see the ReleaseNotes file.
3600 o Minor bugfixes (compiler compatibility):
3601 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3602 style "/* falls through */" comments. Both Clang and GCC allow
3603 __attribute__((fallthrough)) instead, so that's what we're using
3604 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3605 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
3608 o Minor bugfixes (logging):
3609 - Stop truncating IPv6 addresses and ports in channel and connection
3610 logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha.
3611 - Fix a logic error in a log message about whether an address was
3612 invalid. Previously, the code would never report that onion
3613 addresses were onion addresses. Fixes bug 34131; bugfix
3617 Changes in version 0.4.3.4-rc - 2020-04-13
3618 Tor 0.4.3.4-rc is the first release candidate in its series. It fixes
3619 several bugs from earlier versions, including one affecting DoS
3620 defenses on bridges using pluggable transports.
3622 o Major bugfixes (DoS defenses, bridges, pluggable transport):
3623 - Fix a bug that was preventing DoS defenses from running on bridges
3624 with a pluggable transport. Previously, the DoS subsystem was not
3625 given the transport name of the client connection, thus failed to
3626 find the GeoIP cache entry for that client address. Fixes bug
3627 33491; bugfix on 0.3.3.2-alpha.
3629 o Minor feature (sendme, flow control):
3630 - Default to sending SENDME version 1 cells. (Clients are already
3631 sending these, because of a consensus parameter telling them to do
3632 so: this change only affects what clients would do if the
3633 consensus didn't contain a recommendation.) Closes ticket 33623.
3635 o Minor features (testing):
3636 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3637 variable to specify a list of space-separated test cases that
3638 should not be executed. We will use this to disable certain tests
3639 that are failing on Appveyor because of mismatched OpenSSL
3640 libraries. Part of ticket 33643.
3642 o Minor bugfixes (--disable-module-relay):
3643 - Fix an assertion failure when Tor is built without the relay
3644 module, and then invoked with the "User" option. Fixes bug 33668;
3645 bugfix on 0.4.3.1-alpha.
3647 o Minor bugfixes (--disable-module-relay,--disable-module-dirauth):
3648 - Set some output arguments in the relay and dirauth module stubs,
3649 to guard against future stub argument handling bugs like 33668.
3650 Fixes bug 33674; bugfix on 0.4.3.1-alpha.
3652 o Minor bugfixes (build system):
3653 - Correctly output the enabled module in the configure summary.
3654 Before that, the list shown was just plain wrong. Fixes bug 33646;
3655 bugfix on 0.4.3.2-alpha.
3657 o Minor bugfixes (client, IPv6):
3658 - Stop forcing all non-SocksPorts to prefer IPv6 exit connections.
3659 Instead, prefer IPv6 connections by default, but allow users to
3660 change their configs using the "NoPreferIPv6" port flag. Fixes bug
3661 33608; bugfix on 0.4.3.1-alpha.
3662 - Revert PreferIPv6 set by default on the SocksPort because it broke
3663 the torsocks use case. Tor doesn't have a way for an application
3664 to request the hostname to be resolved for a specific IP version,
3665 but torsocks requires that. Up until now, IPv4 was used by default
3666 so torsocks is expecting that, and can't handle a possible IPv6
3667 being returned. Fixes bug 33804; bugfix on 0.4.3.1-alpha.
3669 o Minor bugfixes (key portability):
3670 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3671 if we are not running on Windows. Previously, non-Windows hosts
3672 would reject these line-endings in certain positions, making
3673 certain key files hard to move from one host to another. Fixes bug
3674 33032; bugfix on 0.3.5.1-alpha.
3676 o Minor bugfixes (logging):
3677 - Flush stderr, stdout, and file logs during shutdown, if supported
3678 by the OS. This change helps make sure that any final logs are
3679 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
3680 - Stop closing stderr and stdout during shutdown. Closing these file
3681 descriptors can hide sanitiser logs. Fixes bug 33087; bugfix
3684 o Minor bugfixes (onion services v3):
3685 - Relax severity of a log message that can appear naturally when
3686 decoding onion service descriptors as a relay. Also add some
3687 diagnostics to debug any future bugs in that area. Fixes bug
3688 31669; bugfix on 0.3.0.1-alpha.
3689 - Block a client-side assertion by disallowing the registration of
3690 an x25519 client auth key that's all zeroes. Fixes bug 33545;
3691 bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks".
3693 o Code simplification and refactoring:
3694 - Disable our coding standards best practices tracker in our git
3695 hooks. (0.4.3 branches only.) Closes ticket 33678.
3698 - Avoid conflicts between the fake sockets in tor's unit tests, and
3699 real file descriptors. Resolves issues running unit tests with
3700 GitHub Actions, where the process that embeds or launches the
3701 tests has already opened a large number of file descriptors. Fixes
3702 bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by
3706 - In our Appveyor Windows CI, copy required DLLs to test and app
3707 directories, before running tor's tests. This ensures that tor.exe
3708 and test*.exe use the correct version of each DLL. This fix is not
3709 required, but we hope it will avoid DLL search issues in future.
3710 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3711 - On Appveyor, skip the crypto/openssl_version test, which is
3712 failing because of a mismatched library installation. Fix
3716 Changes in version 0.4.3.3-alpha - 2020-03-18
3717 Tor 0.4.3.3-alpha fixes several bugs in previous releases, including
3718 TROVE-2020-002, a major denial-of-service vulnerability that affected
3719 all released Tor instances since 0.2.1.5-alpha. Using this
3720 vulnerability, an attacker could cause Tor instances to consume a huge
3721 amount of CPU, disrupting their operations for several seconds or
3722 minutes. This attack could be launched by anybody against a relay, or
3723 by a directory cache against any client that had connected to it. The
3724 attacker could launch this attack as much as they wanted, thereby
3725 disrupting service or creating patterns that could aid in traffic
3726 analysis. This issue was found by OSS-Fuzz, and is also tracked
3729 We do not have reason to believe that this attack is currently being
3730 exploited in the wild, but nonetheless we advise everyone to upgrade
3731 as soon as packages are available.
3733 o Major bugfixes (security, denial-of-service):
3734 - Fix a denial-of-service bug that could be used by anyone to
3735 consume a bunch of CPU on any Tor relay or authority, or by
3736 directories to consume a bunch of CPU on clients or hidden
3737 services. Because of the potential for CPU consumption to
3738 introduce observable timing patterns, we are treating this as a
3739 high-severity security issue. Fixes bug 33119; bugfix on
3740 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3741 as TROVE-2020-002 and CVE-2020-10592.
3743 o Major bugfixes (circuit padding, memory leak):
3744 - Avoid a remotely triggered memory leak in the case that a circuit
3745 padding machine is somehow negotiated twice on the same circuit.
3746 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
3747 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
3749 o Major bugfixes (directory authority):
3750 - Directory authorities will now send a 503 (not enough bandwidth)
3751 code to clients when under bandwidth pressure. Known relays and
3752 other authorities will always be answered regardless of the
3753 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
3755 o Minor features (diagnostic):
3756 - Improve assertions and add some memory-poisoning code to try to
3757 track down possible causes of a rare crash (32564) in the EWMA
3758 code. Closes ticket 33290.
3760 o Minor features (directory authorities):
3761 - Directory authorities now reject descriptors from relays running
3762 Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is
3763 still allowed. Resolves ticket 32672. Patch by Neel Chauhan.
3765 o Minor features (usability):
3766 - Include more information when failing to parse a configuration
3767 value. This should make it easier to tell what's going wrong when
3768 a configuration file doesn't parse. Closes ticket 33460.
3770 o Minor bugfix (relay, configuration):
3771 - Warn if the ContactInfo field is not set, and tell the relay
3772 operator that not having a ContactInfo field set might cause their
3773 relay to get rejected in the future. Fixes bug 33361; bugfix
3776 o Minor bugfixes (coding best practices checks):
3777 - Allow the "practracker" script to read unicode files when using
3778 Python 2. We made the script use unicode literals in 0.4.3.1-alpha,
3779 but didn't change the codec for opening files. Fixes bug 33374;
3780 bugfix on 0.4.3.1-alpha.
3782 o Minor bugfixes (continuous integration):
3783 - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix
3786 o Minor bugfixes (onion service v3, client):
3787 - Remove a BUG() warning that would cause a stack trace if an onion
3788 service descriptor was freed while we were waiting for a
3789 rendezvous circuit to complete. Fixes bug 28992; bugfix
3792 o Minor bugfixes (onion services v3):
3793 - Fix an assertion failure that could result from a corrupted
3794 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3795 bugfix on 0.3.3.1-alpha. This issue is also tracked
3798 o Documentation (manpage):
3799 - Alphabetize the Server and Directory server sections of the tor
3800 manpage. Also split Statistics options into their own section of
3801 the manpage. Closes ticket 33188. Work by Swati Thacker as part of
3802 Google Season of Docs.
3803 - Document the __OwningControllerProcess torrc option and specify
3804 its polling interval. Resolves issue 32971.
3806 o Testing (Travis CI):
3807 - Remove a redundant distcheck job. Closes ticket 33194.
3808 - Sort the Travis jobs in order of speed: putting the slowest jobs
3809 first takes full advantage of Travis job concurrency. Closes
3811 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3812 previously configured to fast_finish (which requires
3813 allow_failure), to speed up the build. Closes ticket 33195.
3814 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3815 tool to produce detailed diagnostic output. Closes ticket 32792.
3818 Changes in version 0.4.2.7 - 2020-03-18
3819 This is the third stable release in the 0.4.2.x series. It backports
3820 numerous fixes from later releases, including a fix for TROVE-2020-
3821 002, a major denial-of-service vulnerability that affected all
3822 released Tor instances since 0.2.1.5-alpha. Using this vulnerability,
3823 an attacker could cause Tor instances to consume a huge amount of CPU,
3824 disrupting their operations for several seconds or minutes. This
3825 attack could be launched by anybody against a relay, or by a directory
3826 cache against any client that had connected to it. The attacker could
3827 launch this attack as much as they wanted, thereby disrupting service
3828 or creating patterns that could aid in traffic analysis. This issue
3829 was found by OSS-Fuzz, and is also tracked as CVE-2020-10592.
3831 We do not have reason to believe that this attack is currently being
3832 exploited in the wild, but nonetheless we advise everyone to upgrade
3833 as soon as packages are available.
3835 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
3836 - Fix a denial-of-service bug that could be used by anyone to
3837 consume a bunch of CPU on any Tor relay or authority, or by
3838 directories to consume a bunch of CPU on clients or hidden
3839 services. Because of the potential for CPU consumption to
3840 introduce observable timing patterns, we are treating this as a
3841 high-severity security issue. Fixes bug 33119; bugfix on
3842 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3843 as TROVE-2020-002 and CVE-2020-10592.
3845 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
3846 - Avoid a remotely triggered memory leak in the case that a circuit
3847 padding machine is somehow negotiated twice on the same circuit.
3848 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
3849 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
3851 o Major bugfixes (directory authority, backport from 0.4.3.3-alpha):
3852 - Directory authorities will now send a 503 (not enough bandwidth)
3853 code to clients when under bandwidth pressure. Known relays and
3854 other authorities will always be answered regardless of the
3855 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
3857 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
3858 - Stop allowing failures on the Travis CI stem tests job. It looks
3859 like all the stem hangs we were seeing before are now fixed.
3860 Closes ticket 33075.
3862 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
3863 - Lowercase the configured value of BridgeDistribution before adding
3864 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
3866 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
3867 - If we encounter a bug when flushing a buffer to a TLS connection,
3868 only log the bug once per invocation of the Tor process.
3869 Previously we would log with every occurrence, which could cause
3870 us to run out of disk space. Fixes bug 33093; bugfix
3873 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
3874 - Fix an assertion failure that could result from a corrupted
3875 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3876 bugfix on 0.3.3.1-alpha. This issue is also tracked
3879 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
3880 - Fix a syntax warning given by newer versions of Rust that was
3881 creating problems for our continuous integration. Fixes bug 33212;
3882 bugfix on 0.3.5.1-alpha.
3884 o Testing (Travis CI, backport from 0.4.3.3-alpha):
3885 - Remove a redundant distcheck job. Closes ticket 33194.
3886 - Sort the Travis jobs in order of speed: putting the slowest jobs
3887 first takes full advantage of Travis job concurrency. Closes
3889 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3890 previously configured to fast_finish (which requires
3891 allow_failure), to speed up the build. Closes ticket 33195.
3892 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3893 tool to produce detailed diagnostic output. Closes ticket 32792.
3896 Changes in version 0.4.1.9 - 2020-03-18
3897 Tor 0.4.1.9 backports important fixes from later Tor releases,
3898 including a fix for TROVE-2020-002, a major denial-of-service
3899 vulnerability that affected all released Tor instances since
3900 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor
3901 instances to consume a huge amount of CPU, disrupting their operations
3902 for several seconds or minutes. This attack could be launched by
3903 anybody against a relay, or by a directory cache against any client
3904 that had connected to it. The attacker could launch this attack as
3905 much as they wanted, thereby disrupting service or creating patterns
3906 that could aid in traffic analysis. This issue was found by OSS-Fuzz,
3907 and is also tracked as CVE-2020-10592.
3909 We do not have reason to believe that this attack is currently being
3910 exploited in the wild, but nonetheless we advise everyone to upgrade
3911 as soon as packages are available.
3913 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
3914 - Fix a denial-of-service bug that could be used by anyone to
3915 consume a bunch of CPU on any Tor relay or authority, or by
3916 directories to consume a bunch of CPU on clients or hidden
3917 services. Because of the potential for CPU consumption to
3918 introduce observable timing patterns, we are treating this as a
3919 high-severity security issue. Fixes bug 33119; bugfix on
3920 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3921 as TROVE-2020-002 and CVE-2020-10592.
3923 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
3924 - Avoid a remotely triggered memory leak in the case that a circuit
3925 padding machine is somehow negotiated twice on the same circuit.
3926 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
3927 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
3929 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
3930 - Lowercase the configured value of BridgeDistribution before adding
3931 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
3933 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
3934 - If we encounter a bug when flushing a buffer to a TLS connection,
3935 only log the bug once per invocation of the Tor process.
3936 Previously we would log with every occurrence, which could cause
3937 us to run out of disk space. Fixes bug 33093; bugfix
3940 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
3941 - Fix an assertion failure that could result from a corrupted
3942 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3943 bugfix on 0.3.3.1-alpha. This issue is also tracked
3946 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
3947 - Fix a syntax warning given by newer versions of Rust that was
3948 creating problems for our continuous integration. Fixes bug 33212;
3949 bugfix on 0.3.5.1-alpha.
3951 o Testing (Travis CI, backport from 0.4.3.3-alpha):
3952 - Remove a redundant distcheck job. Closes ticket 33194.
3953 - Sort the Travis jobs in order of speed: putting the slowest jobs
3954 first takes full advantage of Travis job concurrency. Closes
3956 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3957 previously configured to fast_finish (which requires
3958 allow_failure), to speed up the build. Closes ticket 33195.
3959 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3960 tool to produce detailed diagnostic output. Closes ticket 32792.
3963 Changes in version 0.3.5.10 - 2020-03-18
3964 Tor 0.3.5.10 backports many fixes from later Tor releases, including a
3965 fix for TROVE-2020-002, a major denial-of-service vulnerability that
3966 affected all released Tor instances since 0.2.1.5-alpha. Using this
3967 vulnerability, an attacker could cause Tor instances to consume a huge
3968 amount of CPU, disrupting their operations for several seconds or
3969 minutes. This attack could be launched by anybody against a relay, or
3970 by a directory cache against any client that had connected to it. The
3971 attacker could launch this attack as much as they wanted, thereby
3972 disrupting service or creating patterns that could aid in traffic
3973 analysis. This issue was found by OSS-Fuzz, and is also tracked
3976 We do not have reason to believe that this attack is currently being
3977 exploited in the wild, but nonetheless we advise everyone to upgrade
3978 as soon as packages are available.
3980 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
3981 - Fix a denial-of-service bug that could be used by anyone to
3982 consume a bunch of CPU on any Tor relay or authority, or by
3983 directories to consume a bunch of CPU on clients or hidden
3984 services. Because of the potential for CPU consumption to
3985 introduce observable timing patterns, we are treating this as a
3986 high-severity security issue. Fixes bug 33119; bugfix on
3987 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3988 as TROVE-2020-002 and CVE-2020-10592.
3990 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
3991 - Correct how we use libseccomp. Particularly, stop assuming that
3992 rules are applied in a particular order or that more rules are
3993 processed after the first match. Neither is the case! In
3994 libseccomp <2.4.0 this lead to some rules having no effect.
3995 libseccomp 2.4.0 changed how rules are generated, leading to a
3996 different ordering, which in turn led to a fatal crash during
3997 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4000 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
4001 - Stop allowing failures on the Travis CI stem tests job. It looks
4002 like all the stem hangs we were seeing before are now fixed.
4003 Closes ticket 33075.
4005 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4006 - Lowercase the configured value of BridgeDistribution before adding
4007 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4009 o Minor bugfixes (crash, backport from 0.4.2.4-rc):
4010 - When running Tor with an option like --verify-config or
4011 --dump-config that does not start the event loop, avoid crashing
4012 if we try to exit early because of an error. Fixes bug 32407;
4013 bugfix on 0.3.3.1-alpha.
4015 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4016 - If we encounter a bug when flushing a buffer to a TLS connection,
4017 only log the bug once per invocation of the Tor process.
4018 Previously we would log with every occurrence, which could cause
4019 us to run out of disk space. Fixes bug 33093; bugfix
4022 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4023 - Fix an assertion failure that could result from a corrupted
4024 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4025 bugfix on 0.3.3.1-alpha. This issue is also tracked
4028 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4029 - Fix a syntax warning given by newer versions of Rust that was
4030 creating problems for our continuous integration. Fixes bug 33212;
4031 bugfix on 0.3.5.1-alpha.
4033 o Testing (backport from 0.4.3.1-alpha):
4034 - Re-enable the Travis CI macOS Chutney build, but don't let it
4035 prevent the Travis job from finishing. (The Travis macOS jobs are
4036 slow, so we don't want to have it delay the whole CI process.)
4037 Closes ticket 32629.
4038 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4039 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4040 fix the sandbox errors in 32722. Closes ticket 32240.
4042 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4043 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4045 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4046 - Remove a redundant distcheck job. Closes ticket 33194.
4047 - Sort the Travis jobs in order of speed: putting the slowest jobs
4048 first takes full advantage of Travis job concurrency. Closes
4050 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4051 previously configured to fast_finish (which requires
4052 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4053 tool to produce detailed diagnostic output. Closes ticket 32792.
4056 Changes in version 0.4.3.2-alpha - 2020-02-10
4057 This is the second stable alpha release in the Tor 0.4.3.x series. It
4058 fixes several bugs present in the previous alpha release. Anybody
4059 running the previous alpha should upgrade, and look for bugs in this
4062 o Major bugfixes (onion service client, authorization):
4063 - On a NEWNYM signal, purge entries from the ephemeral client
4064 authorization cache. The permanent ones are kept. Fixes bug 33139;
4065 bugfix on 0.4.3.1-alpha.
4067 o Minor features (best practices tracker):
4068 - Practracker now supports a --regen-overbroad option to regenerate
4069 the exceptions file, but only to revise exceptions to be _less_
4070 tolerant of best-practices violations. Closes ticket 32372.
4072 o Minor features (continuous integration):
4073 - Run Doxygen Makefile target on Travis, so we can learn about
4074 regressions in our internal documentation. Closes ticket 32455.
4075 - Stop allowing failures on the Travis CI stem tests job. It looks
4076 like all the stem hangs we were seeing before are now fixed.
4077 Closes ticket 33075.
4079 o Minor bugfixes (build system):
4080 - Revise configure options that were either missing or incorrect in
4081 the configure summary. Fixes bug 32230; bugfix on 0.4.3.1-alpha.
4083 o Minor bugfixes (controller protocol):
4084 - Fix a memory leak introduced by refactoring of control reply
4085 formatting code. Fixes bug 33039; bugfix on 0.4.3.1-alpha.
4086 - Fix a memory leak in GETINFO responses. Fixes bug 33103; bugfix
4088 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
4089 report them as SIGNAL events. Previously we would log a bug
4090 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
4092 o Minor bugfixes (logging):
4093 - If we encounter a bug when flushing a buffer to a TLS connection,
4094 only log the bug once per invocation of the Tor process.
4095 Previously we would log with every occurrence, which could cause
4096 us to run out of disk space. Fixes bug 33093; bugfix
4098 - When logging a bug, do not say "Future instances of this warning
4099 will be silenced" unless we are actually going to silence them.
4100 Previously we would say this whenever a BUG() check failed in the
4101 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
4103 o Minor bugfixes (onion service v2):
4104 - Move a series of v2 onion service warnings to protocol-warning
4105 level because they can all be triggered remotely by a malformed
4106 request. Fixes bug 32706; bugfix on 0.1.1.14-alpha.
4108 o Minor bugfixes (onion service v3, client authorization):
4109 - When removing client authorization credentials using the control
4110 port, also remove the associated descriptor, so the onion service
4111 can no longer be contacted. Fixes bug 33148; bugfix
4114 o Minor bugfixes (pluggable transports):
4115 - When receiving a message on standard error from a pluggable
4116 transport, log it at info level, rather than as a warning. Fixes
4117 bug 33005; bugfix on 0.4.0.1-alpha.
4119 o Minor bugfixes (rust, build):
4120 - Fix a syntax warning given by newer versions of Rust that was
4121 creating problems for our continuous integration. Fixes bug 33212;
4122 bugfix on 0.3.5.1-alpha.
4124 o Minor bugfixes (TLS bug handling):
4125 - When encountering a bug in buf_read_from_tls(), return a "MISC"
4126 error code rather than "WANTWRITE". This change might help avoid
4127 some CPU-wasting loops if the bug is ever triggered. Bug reported
4128 by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha.
4130 o Code simplification and refactoring (mainloop):
4131 - Simplify the ip_address_changed() function by removing redundant
4132 checks. Closes ticket 33091.
4134 o Documentation (manpage):
4135 - Split "Circuit Timeout" options and "Node Selection" options into
4136 their own sections of the tor manpage. Closes tickets 32928 and
4137 32929. Work by Swati Thacker as part of Google Season of Docs.
4140 Changes in version 0.4.2.6 - 2020-01-30
4141 This is the second stable release in the 0.4.2.x series. It backports
4142 several bugfixes from 0.4.3.1-alpha, including some that had affected
4143 the Linux seccomp2 sandbox or Windows services. If you're running with
4144 one of those configurations, you'll probably want to upgrade;
4145 otherwise, you should be fine with 0.4.2.5.
4147 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4148 - Correct how we use libseccomp. Particularly, stop assuming that
4149 rules are applied in a particular order or that more rules are
4150 processed after the first match. Neither is the case! In
4151 libseccomp <2.4.0 this led to some rules having no effect.
4152 libseccomp 2.4.0 changed how rules are generated, leading to a
4153 different ordering, which in turn led to a fatal crash during
4154 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4156 - Fix crash when reloading logging configuration while the
4157 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4158 0.4.1.7. Patch by Peter Gerber.
4160 o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha):
4161 - Use GCC/Clang's printf-checking feature to make sure that
4162 tor_assertf() arguments are correctly typed. Fixes bug 32765;
4163 bugfix on 0.4.1.1-alpha.
4165 o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha):
4166 - Avoid a possible crash when trying to log a (fatal) assertion
4167 failure about mismatched magic numbers in configuration objects.
4168 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
4170 o Minor bugfixes (testing, backport from 0.4.3.1-alpha):
4171 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
4172 test_practracker.sh script. Doing so caused a test failure. Fixes
4173 bug 32705; bugfix on 0.4.2.1-alpha.
4174 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
4175 skipping practracker checks. Fixes bug 32705; bugfix
4178 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
4179 - Initialize the publish/subscribe system when running as a windows
4180 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4182 o Testing (backport from 0.4.3.1-alpha):
4183 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4184 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4185 fix the sandbox errors in 32722. Closes ticket 32240.
4186 - Re-enable the Travis CI macOS Chutney build, but don't let it
4187 prevent the Travis job from finishing. (The Travis macOS jobs are
4188 slow, so we don't want to have it delay the whole CI process.)
4189 Closes ticket 32629.
4191 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4192 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4195 Changes in version 0.4.1.8 - 2020-01-30
4196 This release backports several bugfixes from later release series,
4197 including some that had affected the Linux seccomp2 sandbox or Windows
4198 services. If you're running with one of those configurations, you'll
4199 probably want to upgrade; otherwise, you should be fine with your
4200 current version of 0.4.1.x.
4202 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4203 - Correct how we use libseccomp. Particularly, stop assuming that
4204 rules are applied in a particular order or that more rules are
4205 processed after the first match. Neither is the case! In
4206 libseccomp <2.4.0 this led to some rules having no effect.
4207 libseccomp 2.4.0 changed how rules are generated, leading to a
4208 different ordering, which in turn led to a fatal crash during
4209 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4211 - Fix crash when reloading logging configuration while the
4212 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4213 0.4.1.7. Patch by Peter Gerber.
4215 o Minor bugfixes (crash, backport form 0.4.2.4-rc):
4216 - When running Tor with an option like --verify-config or
4217 --dump-config that does not start the event loop, avoid crashing
4218 if we try to exit early because of an error. Fixes bug 32407;
4219 bugfix on 0.3.3.1-alpha.
4221 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
4222 - Initialize the publish/subscribe system when running as a windows
4223 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4225 o Testing (backport from 0.4.3.1-alpha):
4226 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4227 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4228 fix the sandbox errors in 32722. Closes ticket 32240.
4229 - Re-enable the Travis CI macOS Chutney build, but don't let it
4230 prevent the Travis job from finishing. (The Travis macOS jobs are
4231 slow, so we don't want to have it delay the whole CI process.)
4232 Closes ticket 32629.
4234 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4235 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4238 Changes in version 0.4.3.1-alpha - 2020-01-22
4239 This is the first alpha release in the 0.4.3.x series. It includes
4240 improved support for application integration of onion services, support
4241 for building in a client-only mode, and newly improved internal
4242 documentation (online at https://src-ref.docs.torproject.org/tor/). It
4243 also has numerous other small bugfixes and features, as well as
4244 improvements to our code's internal organization that should help us
4245 write better code in the future.
4247 o New system requirements:
4248 - When building Tor, you now need to have Python 3 in order to run
4249 the integration tests. (Python 2 is officially unsupported
4250 upstream, as of 1 Jan 2020.) Closes ticket 32608.
4252 o Major features (build system):
4253 - The relay code can now be disabled using the --disable-module-relay
4254 configure option. When this option is set, we also disable the
4255 dirauth module. Closes ticket 32123.
4256 - When Tor is compiled --disable-module-relay, we also omit the code
4257 used to act as a directory cache. Closes ticket 32487.
4259 o Major features (directory authority, ed25519):
4260 - Add support for banning a relay's ed25519 keys in the approved-
4261 routers file. This will help us migrate away from RSA keys in the
4262 future. Previously, only RSA keys could be banned in approved-
4263 routers. Resolves ticket 22029. Patch by Neel Chauhan.
4265 o Major features (onion service, controller):
4266 - New control port commands to manage client-side onion service
4267 authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
4268 a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
4269 ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
4271 o Major features (onion service, SOCKS5):
4272 - Introduce a new SocksPort flag, ExtendedErrors, to support more
4273 detailed error codes in information for applications that support
4274 them. Closes ticket 30382; implements proposal 304.
4276 o Major features (proxy):
4277 - In addition to its current supported proxy types (HTTP CONNECT,
4278 SOCKS4, and SOCKS5), Tor can now make its OR connections through a
4279 HAProxy server. A new torrc option was added to specify the
4280 address/port of the server: TCPProxy <protocol> <host>:<port>.
4281 Currently the only supported protocol for the option is haproxy.
4282 Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).
4284 o Major bugfixes (linux seccomp sandbox):
4285 - Correct how we use libseccomp. Particularly, stop assuming that
4286 rules are applied in a particular order or that more rules are
4287 processed after the first match. Neither is the case! In
4288 libseccomp <2.4.0 this led to some rules having no effect.
4289 libseccomp 2.4.0 changed how rules are generated, leading to a
4290 different ordering, which in turn led to a fatal crash during
4291 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4293 - Fix crash when reloading logging configuration while the
4294 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4295 0.4.1.7. Patch by Peter Gerber.
4297 o Major bugfixes (networking):
4298 - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
4299 and accept strings as well as binary addresses. Fixes bug 32315;
4300 bugfix on 0.3.5.1-alpha.
4302 o Major bugfixes (onion service):
4303 - Report HS circuit failure back into the HS subsystem so we take
4304 appropriate action with regards to the client introduction point
4305 failure cache. This improves reachability of onion services, since
4306 now clients notice failing introduction circuits properly. Fixes
4307 bug 32020; bugfix on 0.3.2.1-alpha.
4309 o Minor feature (configure, build system):
4310 - Output a list of enabled/disabled features at the end of the
4311 configure process in a pleasing way. Closes ticket 31373.
4313 o Minor feature (heartbeat, onion service):
4314 - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
4315 message. Closes ticket 31371.
4317 o Minor features (configuration validation):
4318 - Configuration validation can now be done by per-module callbacks,
4319 rather than a global validation function. This will let us reduce
4320 the size of config.c and some of its more cumbersome functions.
4321 Closes ticket 31241.
4323 o Minor features (configuration):
4324 - If a configured hardware crypto accelerator in AccelName is
4325 prefixed with "!", Tor now exits when it cannot be found. Closes
4327 - We now use flag-driven logic to warn about obsolete configuration
4328 fields, so that we can include their names. In 0.4.2, we used a
4329 special type, which prevented us from generating good warnings.
4330 Implements ticket 32404.
4332 o Minor features (controller):
4333 - Add stream isolation data to STREAM event. Closes ticket 19859.
4334 - Implement a new GETINFO command to fetch microdescriptor
4335 consensus. Closes ticket 31684.
4337 o Minor features (debugging, directory system):
4338 - Don't crash when we find a non-guard with a guard-fraction value
4339 set. Instead, log a bug warning, in an attempt to figure out how
4340 this happened. Diagnostic for ticket 32868.
4342 o Minor features (defense in depth):
4343 - Add additional checks around tor_vasprintf() usage, in case the
4344 function returns an error. Patch by Tobias Stoeckmann. Fixes
4347 o Minor features (developer tooling):
4348 - Remove the 0.2.9.x series branches from git scripts (git-merge-
4349 forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
4350 Closes ticket 32772.
4352 o Minor features (developer tools):
4353 - Add a check_cocci_parse.sh script that checks that new code is
4354 parseable by Coccinelle. Add an exceptions file for unparseable
4355 files, and run the script from travis CI. Closes ticket 31919.
4356 - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
4357 target. Closes ticket 31919.
4358 - Add a rename_c_identifiers.py tool to rename a bunch of C
4359 identifiers at once, and generate a well-formed commit message
4360 describing the change. This should help with refactoring. Closes
4362 - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
4363 semantic patching tool with the correct flags. These flags are
4364 fairly easy to forget, and these scripts should help us use
4365 Coccinelle more effectively in the future. Closes ticket 31705.
4367 o Minor features (Doxygen):
4368 - Update Doxygen configuration file to a more recent template (from
4369 1.8.15). Closes ticket 32110.
4370 - "make doxygen" now works with out-of-tree builds. Closes
4372 - Make sure that doxygen outputs documentation for all of our C
4373 files. Previously, some were missing @file declarations, causing
4374 them to be ignored. Closes ticket 32307.
4375 - Our "make doxygen" target now respects --enable-fatal-warnings by
4376 default, and does not warn about items that are missing
4377 documentation. To warn about missing documentation, run configure
4378 with the "--enable-missing-doc-warnings" flag: doing so suspends
4379 fatal warnings for doxygen. Closes ticket 32385.
4381 o Minor features (git scripts):
4382 - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
4383 customisation. Closes ticket 32347.
4384 - Add git-setup-dirs.sh, which sets up an upstream git repository
4385 and worktrees for tor maintainers. Closes ticket 29603.
4386 - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
4387 remote. Closes ticket 32347.
4388 - Call the check_cocci_parse.sh script from the git commit and push
4389 hooks. Closes ticket 31919.
4390 - Make git-push-all.sh skip unchanged branches when pushing to
4391 upstream. The script already skipped unchanged test branches.
4392 Closes ticket 32216.
4393 - Make git-setup-dirs.sh create a master symlink in the worktree
4394 directory. Closes ticket 32347.
4395 - Skip unmodified source files when doing some existing git hook
4396 checks. Related to ticket 31919.
4398 o Minor features (IPv6, client):
4399 - Make Tor clients tell dual-stack exits that they prefer IPv6
4400 connections. This change is equivalent to setting the PreferIPv6
4401 flag on SOCKSPorts (and most other listener ports). Tor Browser
4402 has been setting this flag for some time, and we want to remove a
4403 client distinguisher at exits. Closes ticket 32637.
4405 o Minor features (portability, android):
4406 - When building for Android, disable some tests that depend on $HOME
4407 and/or pwdb, which Android doesn't have. Closes ticket 32825.
4408 Patch from Hans-Christoph Steiner.
4410 o Minor features (relay modularity):
4411 - Split the relay and server pluggable transport config code into
4412 separate files in the relay module. Disable this code when the
4413 relay module is disabled. Closes part of ticket 32213.
4414 - When the relay module is disabled, reject attempts to set the
4415 ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
4416 ServerTransport* options, rather than ignoring the values of these
4417 options. Closes part of ticket 32213.
4419 o Minor features (relay):
4420 - When the relay module is disabled, change the default config so
4421 that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.
4423 o Minor features (release tools):
4424 - Port our ChangeLog formatting and sorting tools to Python 3.
4425 Closes ticket 32704.
4427 o Minor features (testing):
4428 - Detect some common failure cases for test_parseconf.sh in
4429 src/test/conf_failures. Closes ticket 32451.
4430 - Allow test_parseconf.sh to test expected log outputs for successful
4431 configs, as well as failed configs. Closes ticket 32451.
4432 - The test_parseconf.sh script now supports result variants for any
4433 combination of the optional libraries lzma, nss, and zstd. Closes
4436 o Minor features (tests, Android):
4437 - When running the unit tests on Android, create temporary files in
4438 a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
4439 patch from Hans-Christoph Steiner.
4441 o Minor bugfixes (bridges):
4442 - Lowercase the configured value of BridgeDistribution before adding
4443 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4445 o Minor bugfixes (build system):
4446 - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
4447 bugfix on 0.4.1.2-alpha.
4449 o Minor bugfixes (configuration handling):
4450 - Make control_event_conf_changed() take in a config_line_t instead
4451 of a smartlist of alternating key/value entries. Fixes bug 31531;
4452 bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
4454 o Minor bugfixes (configuration):
4455 - Check for multiplication overflow when parsing memory units inside
4456 configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
4457 - When dumping the configuration, stop adding a trailing space after
4458 the option name when there is no option value. This issue only
4459 affects options that accept an empty value or list. (Most options
4460 reject empty values, or delete the entire line from the dumped
4461 options.) Fixes bug 32352; bugfix on 0.0.9pre6.
4462 - Avoid changing the user's value of HardwareAccel as stored by
4463 SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
4464 bug 32382; bugfix on 0.2.2.1-alpha.
4465 - When creating a KeyDirectory with the same location as the
4466 DataDirectory (not recommended), respect the DataDirectory's
4467 group-readable setting if one has not been set for the
4468 KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.
4470 o Minor bugfixes (controller):
4471 - In routerstatus_has_changed(), check all the fields that are
4472 output over the control port. Fixes bug 20218; bugfix
4475 o Minor bugfixes (correctness checks):
4476 - Use GCC/Clang's printf-checking feature to make sure that
4477 tor_assertf() arguments are correctly typed. Fixes bug 32765;
4478 bugfix on 0.4.1.1-alpha.
4480 o Minor bugfixes (developer tools):
4481 - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
4482 31336; bugfix on 0.4.1.2-alpha.
4484 o Minor bugfixes (dirauth module):
4485 - Split the dirauth config code into a separate file in the dirauth
4486 module. Disable this code when the dirauth module is disabled.
4487 Closes ticket 32213.
4488 - When the dirauth module is disabled, reject attempts to set the
4489 AuthoritativeDir option, rather than ignoring the value of the
4490 option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.
4492 o Minor bugfixes (embedded Tor):
4493 - When starting Tor any time after the first time in a process,
4494 register the thread in which it is running as the main thread.
4495 Previously, we only did this on Windows, which could lead to bugs
4496 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
4499 o Minor bugfixes (git scripts):
4500 - Avoid sleeping before the last push in git-push-all.sh. Closes
4502 - Forward all unrecognised arguments in git-push-all.sh to git push.
4503 Closes ticket 32216.
4505 o Minor bugfixes (hidden service v3):
4506 - Do not rely on a "circuit established" flag for intro circuits but
4507 instead always query the HS circuit map. This is to avoid sync
4508 issue with that flag and the map. Fixes bug 32094; bugfix
4511 o Minor bugfixes (logging, crash):
4512 - Avoid a possible crash when trying to log a (fatal) assertion
4513 failure about mismatched magic numbers in configuration objects.
4514 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
4516 o Minor bugfixes (onion service v2):
4517 - When sending the INTRO cell for a v2 Onion Service, look at the
4518 failure cache alongside timeout values to check if the intro point
4519 is marked as failed. Previously, we only looked at the relay
4520 timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
4523 o Minor bugfixes (onion services v3, client):
4524 - Properly handle the client rendezvous circuit timeout. Previously
4525 Tor would sometimes timeout a rendezvous circuit awaiting the
4526 introduction ACK, and find itself unable to re-establish all
4527 circuits because the rendezvous circuit timed out too early. Fixes
4528 bug 32021; bugfix on 0.3.2.1-alpha.
4530 o Minor bugfixes (onion services):
4531 - In cancel_descriptor_fetches(), use
4532 connection_list_by_type_purpose() instead of
4533 connection_list_by_type_state(). Fixes bug 32639; bugfix on
4534 0.3.2.1-alpha. Patch by Neel Chauhan.
4536 o Minor bugfixes (scripts):
4537 - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
4538 bugfix on 0.4.0.1-alpha.
4540 o Minor bugfixes (test):
4541 - Use the same code to find the tor binary in all of our test
4542 scripts. This change makes sure we are always using the coverage
4543 binary when coverage is enabled. Fixes bug 32368; bugfix
4546 o Minor bugfixes (testing):
4547 - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
4548 Fixes bug 32468; bugfix on 0.4.2.1-alpha.
4549 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
4550 test_practracker.sh script. Doing so caused a test failure. Fixes
4551 bug 32705; bugfix on 0.4.2.1-alpha.
4552 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
4553 skipping practracker checks. Fixes bug 32705; bugfix
4556 o Minor bugfixes (tests):
4557 - Our option-validation tests no longer depend on specially
4558 configured non-default, non-passing sets of options. Previously,
4559 the tests had been written to assume that options would _not_ be
4560 set to their defaults, which led to needless complexity and
4561 verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.
4563 o Minor bugfixes (windows service):
4564 - Initialize the publish/subscribe system when running as a windows
4565 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4567 o Deprecated features:
4568 - Deprecate the ClientAutoIPv6ORPort option. This option was not
4569 true "Happy Eyeballs", and often failed on connections that
4570 weren't reliably dual-stack. Closes ticket 32942. Patch by
4574 - Provide a quickstart guide for a Circuit Padding Framework, and
4575 documentation for researchers to implement and study circuit
4576 padding machines. Closes ticket 28804.
4577 - Add documentation in 'HelpfulTools.md' to describe how to build a
4578 tag file. Closes ticket 32779.
4579 - Create a high-level description of the long-term software
4580 architecture goals. Closes ticket 32206.
4581 - Describe the --dump-config command in the manual page. Closes
4583 - Unite coding advice from this_not_that.md in torguts repo into our
4584 coding standards document. Resolves ticket 31853.
4587 - Our Doxygen configuration no longer generates LaTeX output. The
4588 reference manual produced by doing this was over 4000 pages long,
4589 and generally unusable. Closes ticket 32099.
4590 - The option "TestingEstimatedDescriptorPropagationTime" is now
4591 marked as obsolete. It has had no effect since 0.3.0.7, when
4592 clients stopped rejecting consensuses "from the future". Closes
4594 - We no longer support consensus methods before method 28; these
4595 methods were only used by authorities running versions of Tor that
4596 are now at end-of-life. In effect, this means that clients,
4597 relays, and authorities now assume that authorities will be
4598 running version 0.3.5.x or later. Closes ticket 32695.
4601 - Add more test cases for tor's UTF-8 validation function. Also,
4602 check the arguments passed to the function for consistency. Closes
4604 - Improve test coverage for relay and dirauth config code, focusing
4605 on option validation and normalization. Closes ticket 32213.
4606 - Improve the consistency of test_parseconf.sh output, and run all
4607 the tests, even if one fails. Closes ticket 32213.
4608 - Re-enable the Travis CI macOS Chutney build, but don't let it
4609 prevent the Travis job from finishing. (The Travis macOS jobs are
4610 slow, so we don't want to have it delay the whole CI process.)
4611 Closes ticket 32629.
4612 - Run the practracker unit tests in the pre-commit git hook. Closes
4614 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4615 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4616 fix the sandbox errors in 32722. Closes ticket 32240.
4618 o Code simplification and refactoring (channel):
4619 - Channel layer had a variable length cell handler that was not used
4620 and thus removed. Closes ticket 32892.
4622 o Code simplification and refactoring (configuration):
4623 - Immutability is now implemented as a flag on individual
4624 configuration options rather than as part of the option-transition
4625 checking code. Closes ticket 32344.
4626 - Instead of keeping a list of configuration options to check for
4627 relative paths, check all the options whose type is "FILENAME".
4628 Solves part of ticket 32339.
4629 - Our default log (which ordinarily sends NOTICE-level messages to
4630 standard output) is now handled in a more logical manner.
4631 Previously, we replaced the configured log options if they were
4632 empty. Now, we interpret an empty set of log options as meaning
4633 "use the default log". Closes ticket 31999.
4634 - Remove some unused arguments from the options_validate() function,
4635 to simplify our code and tests. Closes ticket 32187.
4636 - Simplify the options_validate() code so that it looks at the
4637 default options directly, rather than taking default options as an
4638 argument. This change lets us simplify its interface. Closes
4640 - Use our new configuration architecture to move most authority-
4641 related options to the directory authority module. Closes
4643 - When parsing the command line, handle options that determine our
4644 "quiet level" and our mode of operation (e.g., --dump-config and
4645 so on) all in one table. Closes ticket 32003.
4647 o Code simplification and refactoring (controller):
4648 - Create a new abstraction for formatting control protocol reply
4649 lines based on key-value pairs. Refactor some existing control
4650 protocol code to take advantage of this. Closes ticket 30984.
4651 - Create a helper function that can fetch network status or
4652 microdesc consensuses. Closes ticket 31684.
4654 o Code simplification and refactoring (dirauth modularization):
4655 - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
4656 Closes ticket 32163.
4657 - Replace some confusing identifiers in process_descs.c. Closes
4659 - Simplify some relay and dirauth config code. Closes ticket 32213.
4661 o Code simplification and refactoring (misc):
4662 - Make all the structs we declare follow the same naming convention
4663 of ending with "_t". Closes ticket 32415.
4664 - Move and rename some configuration-related code for clarity.
4665 Closes ticket 32304.
4666 - Our include.am files are now broken up by subdirectory.
4667 Previously, src/core/include.am covered all of the subdirectories
4668 in "core", "feature", and "app". Closes ticket 32137.
4669 - Remove underused NS*() macros from test code: they make our tests
4670 more confusing, especially for code-formatting tools. Closes
4673 o Code simplification and refactoring (relay modularization):
4674 - Disable relay_periodic when the relay module is disabled. Closes
4676 - Disable relay_sys when the relay module is disabled. Closes
4679 o Code simplification and refactoring (tool support):
4680 - Add numerous missing dependencies to our include files, so that
4681 they can be included in different reasonable orders and still
4682 compile. Addresses part of ticket 32764.
4683 - Fix some parts of our code that were difficult for Coccinelle to
4684 parse. Related to ticket 31705.
4685 - Fix some small issues in our code that prevented automatic
4686 formatting tools from working. Addresses part of ticket 32764.
4688 o Documentation (manpage):
4689 - Alphabetize the Client Options section of the tor manpage. Closes
4691 - Alphabetize the General Options section of the tor manpage. Closes
4693 - In the tor(1) manpage, reword and improve formatting of the
4694 COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
4695 32277. Based on work by Swati Thacker as part of Google Season
4697 - In the tor(1) manpage, reword and improve formatting of the FILES,
4698 SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
4699 Swati Thacker as part of Google Season of Docs.
4701 o Testing (circuit, EWMA):
4702 - Add unit tests for circuitmux and EWMA subsystems. Closes
4705 o Testing (continuous integration):
4706 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4709 Changes in version 0.4.2.5 - 2019-12-09
4710 This is the first stable release in the 0.4.2.x series. This series
4711 improves reliability and stability, and includes several stability and
4712 correctness improvements for onion services. It also fixes many smaller
4713 bugs present in previous series.
4715 Per our support policy, we will support the 0.4.2.x series for nine
4716 months, or until three months after the release of a stable 0.4.3.x:
4717 whichever is longer. If you need longer-term support, please stick
4718 with 0.3.5.x, which will we plan to support until Feb 2022.
4720 Per our support policy, we will support the 0.4.2.x series for nine
4721 months, or until three months after the release of a stable 0.4.3.x:
4722 whichever is longer. If you need longer-term support, please stick
4723 with 0.3.5.x, which will we plan to support until Feb 2022.
4725 Below are the changes since 0.4.1.4-rc. For a complete list of changes
4726 since 0.4.1.5, see the ReleaseNotes file.
4728 o Minor features (geoip):
4729 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4730 Country database. Closes ticket 32685.
4733 - Require C99 standards-conforming code in Travis CI, but allow GNU
4734 gcc extensions. Also activates clang's -Wtypedef-redefinition
4735 warnings. Build some jobs with -std=gnu99, and some jobs without.
4736 Closes ticket 32500.
4739 Changes in version 0.4.1.7 - 2019-12-09
4740 This release backports several bugfixes to improve stability and
4741 correctness. Anyone experiencing build problems or crashes with 0.4.1.6,
4742 including all relays relying on AccountingMax, should upgrade.
4744 o Major features (directory authorities, backport from 0.4.2.2-alpha):
4745 - Directory authorities now reject relays running all currently
4746 deprecated release series. The currently supported release series
4747 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
4749 o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha):
4750 - Avoid a possible crash when restarting Tor in embedded mode and
4751 enabling a different set of publish/subscribe messages. Fixes bug
4752 31898; bugfix on 0.4.1.1-alpha.
4754 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
4755 - Relays now respect their AccountingMax bandwidth again. When
4756 relays entered "soft" hibernation (which typically starts when
4757 we've hit 90% of our AccountingMax), we had stopped checking
4758 whether we should enter hard hibernation. Soft hibernation refuses
4759 new connections and new circuits, but the existing circuits can
4760 continue, meaning that relays could have exceeded their configured
4761 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
4763 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
4764 - Stop ignoring torrc options after an %include directive, when the
4765 included directory ends with a file that does not contain any
4766 config options (but does contain comments or whitespace). Fixes
4767 bug 31408; bugfix on 0.3.1.1-alpha.
4769 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
4770 - Onion services now always use the exact number of intro points
4771 configured with the HiddenServiceNumIntroductionPoints option (or
4772 fewer if nodes are excluded). Before, a service could sometimes
4773 pick more intro points than configured. Fixes bug 31548; bugfix
4776 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
4777 - When building on Appveyor and Travis, pass the "-k" flag to make,
4778 so that we are informed of all compilation failures, not just the
4779 first one or two. Closes ticket 31372.
4781 o Minor features (geoip, backport from 0.4.2.5):
4782 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4783 Country database. Closes ticket 32685.
4785 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
4786 - Avoid spurious errors when Appveyor CI fails before the install step.
4787 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
4789 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
4790 - Fix a BUG() assertion that occurs within a very small race window
4791 between when a client intro circuit opens and when its descriptor
4792 gets cleaned up from the cache. The circuit is now closed early,
4793 which will trigger a re-fetch of the descriptor and continue the
4794 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
4796 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
4797 - Avoid trying to read data from closed connections, which can cause
4798 needless loops in Libevent and infinite loops in Shadow. Fixes bug
4799 30344; bugfix on 0.1.1.1-alpha.
4801 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
4802 - On abort, try harder to flush the output buffers of log messages.
4803 On some platforms (macOS), log messages could be discarded when
4804 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4805 - Report the tor version whenever an assertion fails. Previously, we
4806 only reported the Tor version on some crashes, and some non-fatal
4807 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4808 - When tor aborts due to an error, close log file descriptors before
4809 aborting. Closing the logs makes some OSes flush log file buffers,
4810 rather than deleting buffered log lines. Fixes bug 31594; bugfix
4813 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
4814 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
4815 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
4816 - Disable backtrace signal handlers when shutting down tor. Fixes
4817 bug 31614; bugfix on 0.2.5.2-alpha.
4818 - Rate-limit our the logging message about the obsolete .exit
4819 notation. Previously, there was no limit on this warning, which
4820 could potentially be triggered many times by a hostile website.
4821 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
4823 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
4824 - Do not log a nonfatal assertion failure when receiving a VERSIONS
4825 cell on a connection using the obsolete v1 link protocol. Log a
4826 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
4828 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
4829 - Reset the periodic events' "enabled" flag when Tor is shut down
4830 cleanly. Previously, this flag was left on, which caused periodic
4831 events not to be re-enabled when Tor was relaunched in-process
4832 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
4835 o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha):
4836 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
4837 31736; bugfix on 0.0.7.
4839 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
4840 - Remove overly strict assertions that triggered when a pluggable
4841 transport failed to launch. Fixes bug 31091; bugfix
4843 - Remove an assertion in the Unix process backend. This assertion
4844 would trigger when we failed to find the executable for a child
4845 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
4847 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
4848 - Avoid crashing when starting with a corrupt keys directory where
4849 the old ntor key and the new ntor key are identical. Fixes bug
4850 30916; bugfix on 0.2.4.8-alpha.
4852 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
4853 - When testing port rebinding, don't busy-wait for tor to log.
4854 Instead, actually sleep for a short time before polling again.
4855 Also improve the formatting of control commands and log messages.
4856 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
4858 o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha):
4859 - Avoid a map_anon_nofork test failure due to a signed/unsigned
4860 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
4862 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
4863 - Log bugs about the TLS read buffer's length only once, rather than
4864 filling the logs with similar warnings. Fixes bug 31939; bugfix
4867 o Documentation (backport from 0.4.2.2-alpha):
4868 - Explain why we can't destroy the backtrace buffer mutex. Explain
4869 why we don't need to destroy the log mutex. Closes ticket 31736.
4871 o Testing (continuous integration, backport from 0.4.2.3-alpha):
4872 - Disable all but one Travis CI macOS build, to mitigate slow
4873 scheduling of Travis macOS jobs. Closes ticket 32177.
4874 - Run the chutney IPv6 networks as part of Travis CI. Closes
4876 - Simplify the Travis CI build matrix, and optimise for build time.
4877 Closes ticket 31859.
4878 - Use Windows Server 2019 instead of Windows Server 2016 in our
4879 Appveyor builds. Closes ticket 32086.
4881 o Testing (continuous integration, backport from 0.4.2.4-rc):
4882 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
4883 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
4884 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
4885 until we can fix some Bionic permissions issues (see ticket
4886 32240). Related to ticket 31919.
4887 - Install the mingw OpenSSL package in Appveyor. This makes sure
4888 that the OpenSSL headers and libraries match in Tor's Appveyor
4889 builds. (This bug was triggered by an Appveyor image update.)
4890 Fixes bug 32449; bugfix on 0.3.5.6-rc.
4892 o Testing (continuous integration, backport from 0.4.2.5):
4893 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
4894 extensions. Also activates clang's -Wtypedef-redefinition warnings.
4895 Build some jobs with -std=gnu99, and some jobs without.
4896 Closes ticket 32500.
4899 Changes in version 0.4.0.6 - 2019-12-09
4900 This is the second stable release in the 0.4.0.x series. This release
4901 backports several bugfixes to improve stability and correctness. Anyone
4902 experiencing build problems or crashes with 0.4.0.5, including all relays
4903 relying on AccountingMax, should upgrade.
4905 Note that, per our support policy, support for the 0.4.0.x series will end
4906 on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the
4907 latest stable release, or downgrade to 0.3.5.x, which will get long-term
4908 support until 1 Feb 2022.
4910 o Directory authority changes (backport from 0.4.1.5):
4911 - The directory authority "dizum" has a new IP address. Closes
4914 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
4915 - Consider our directory information to have changed when our list
4916 of bridges changes. Previously, Tor would not re-compute the
4917 status of its directory information when bridges changed, and
4918 therefore would not realize that it was no longer able to build
4919 circuits. Fixes part of bug 29875.
4920 - Do not count previously configured working bridges towards our
4921 total of working bridges. Previously, when Tor's list of bridges
4922 changed, it would think that the old bridges were still usable,
4923 and delay fetching router descriptors for the new ones. Fixes part
4924 of bug 29875; bugfix on 0.3.0.1-alpha.
4926 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
4927 - When considering upgrading circuits from "waiting for guard" to
4928 "open", always ignore circuits that are marked for close. Otherwise,
4929 we can end up in the situation where a subsystem is notified that
4930 a closing circuit has just opened, leading to undesirable
4931 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
4933 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
4934 - Properly clean up the introduction point map when circuits change
4935 purpose from onion service circuits to pathbias, measurement, or
4936 other circuit types. This should fix some service-side instances
4937 of introduction point failure. Fixes bug 29034; bugfix
4940 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
4941 - Fix an unreachable bug in which an introduction point could try to
4942 send an INTRODUCE_ACK with a status code that Trunnel would refuse
4943 to encode, leading the relay to assert(). We've consolidated the
4944 ABI values into Trunnel now. Fixes bug 30454; bugfix
4946 - Clients can now handle unknown status codes from INTRODUCE_ACK
4947 cells. (The NACK behavior will stay the same.) This will allow us
4948 to extend status codes in the future without breaking the normal
4949 client behavior. Fixes another part of bug 30454; bugfix
4952 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
4953 - Relays now respect their AccountingMax bandwidth again. When
4954 relays entered "soft" hibernation (which typically starts when
4955 we've hit 90% of our AccountingMax), we had stopped checking
4956 whether we should enter hard hibernation. Soft hibernation refuses
4957 new connections and new circuits, but the existing circuits can
4958 continue, meaning that relays could have exceeded their configured
4959 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
4961 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
4962 - Stop ignoring torrc options after an %include directive, when the
4963 included directory ends with a file that does not contain any
4964 config options (but does contain comments or whitespace). Fixes
4965 bug 31408; bugfix on 0.3.1.1-alpha.
4967 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
4968 - Onion services now always use the exact number of intro points
4969 configured with the HiddenServiceNumIntroductionPoints option (or
4970 fewer if nodes are excluded). Before, a service could sometimes
4971 pick more intro points than configured. Fixes bug 31548; bugfix
4974 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
4975 - Add a "--list-modules" command to print a list of which compile-
4976 time modules are enabled. Closes ticket 30452.
4978 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
4979 - Remove sudo configuration lines from .travis.yml as they are no
4980 longer needed with current Travis build environment. Resolves
4983 o Minor features (continuous integration, backport from 0.4.1.4-rc):
4984 - Our Travis configuration now uses Chutney to run some network
4985 integration tests automatically. Closes ticket 29280.
4987 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
4988 - When building on Appveyor and Travis, pass the "-k" flag to make,
4989 so that we are informed of all compilation failures, not just the
4990 first one or two. Closes ticket 31372.
4992 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
4993 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
4994 in December 2018 (of which ~122 were still functional), with a
4995 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
4996 in June 2019. Closes ticket 28795.
4998 o Minor features (geoip, backport from 0.4.2.5):
4999 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5000 Country database. Closes ticket 32685.
5002 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5003 - Change "make test-stem" so it only runs the stem tests that use
5004 tor. This change makes test-stem faster and more reliable. Closes
5007 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5008 - Avoid spurious errors when Appveyor CI fails before the install step.
5009 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5011 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5012 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5013 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5015 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
5016 - Fix a logic error that prevented the SessionGroup sub-option from
5017 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5019 o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc):
5020 - On relays, properly check that a padding machine is absent before
5021 logging a warning about it being absent. Fixes bug 30649; bugfix
5024 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5025 - Fix a BUG() assertion that occurs within a very small race window
5026 between when a client intro circuit opens and when its descriptor
5027 gets cleaned up from the cache. The circuit is now closed early,
5028 which will trigger a re-fetch of the descriptor and continue the
5029 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5031 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
5032 - Don't believe clock skew results from NETINFO cells that appear to
5033 arrive before we sent the VERSIONS cells they are responding to.
5034 Previously, we would accept them up to 3 minutes "in the past".
5035 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5037 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
5038 - Fix a compilation warning on Windows about casting a function
5039 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5042 o Minor bugfixes (compilation, backport from 0.4.1.5):
5043 - Avoid using labs() on time_t, which can cause compilation warnings
5044 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5046 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5047 - Suppress spurious float-conversion warnings from GCC when calling
5048 floating-point classifier functions on FreeBSD. Fixes part of bug
5049 31687; bugfix on 0.3.1.5-alpha.
5051 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
5052 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5053 due to missing declarations of abort(), and prevent other such
5054 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5056 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
5057 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5058 want authentication along with configured (but unused!)
5059 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5061 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5062 - Avoid trying to read data from closed connections, which can cause
5063 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5064 30344; bugfix on 0.1.1.1-alpha.
5066 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
5067 - Allow the test-stem job to fail in Travis, because it sometimes
5068 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5069 - Skip test_rebind on macOS in Travis, because it is unreliable on
5070 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5071 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5072 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5074 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
5075 - Avoid a set of possible code paths that could try to use freed
5076 memory in routerlist_free() while Tor was exiting. Fixes bug
5077 31003; bugfix on 0.1.2.2-alpha.
5079 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
5080 - Stop crashing after parsing an unknown descriptor purpose
5081 annotation. We think this bug can only be triggered by modifying a
5082 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5084 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
5085 - Move the "bandwidth-file-headers" line in directory authority
5086 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5089 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5090 - On abort, try harder to flush the output buffers of log messages.
5091 On some platforms (macOS), log messages could be discarded when
5092 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5093 - Report the tor version whenever an assertion fails. Previously, we
5094 only reported the Tor version on some crashes, and some non-fatal
5095 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5097 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5098 - When extracting an IPv6 address from a PF-based proxy, verify that
5099 we are actually configured to receive an IPv6 address, and log an
5100 internal error if not. Fixes part of bug 31687; bugfix
5103 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5104 - When tor is missing descriptors for some primary entry guards,
5105 make the log message less alarming. It's normal for descriptors to
5106 expire, as long as tor fetches new ones soon after. Fixes bug
5107 31657; bugfix on 0.3.3.1-alpha.
5109 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
5110 - Do not log a warning when running with an OpenSSL version other
5111 than the one Tor was compiled with, if the two versions should be
5112 compatible. Previously, we would warn whenever the version was
5113 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5115 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5116 - Change log level of message "Hash of session info was not as
5117 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5120 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5121 - Rate-limit our the logging message about the obsolete .exit
5122 notation. Previously, there was no limit on this warning, which
5123 could potentially be triggered many times by a hostile website.
5124 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5126 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5127 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5128 cell on a connection using the obsolete v1 link protocol. Log a
5129 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5131 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5132 - Reset the periodic events' "enabled" flag when Tor is shut down
5133 cleanly. Previously, this flag was left on, which caused periodic
5134 events not to be re-enabled when Tor was relaunched in-process
5135 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5138 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
5139 - Avoid a minor memory leak that could occur on relays when failing
5140 to create a "keys" directory. Fixes bug 30148; bugfix
5143 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
5144 - Fix a trivial memory leak when parsing an invalid value
5145 from a download schedule in the configuration. Fixes bug
5146 30894; bugfix on 0.3.4.1-alpha.
5148 o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha):
5149 - Fix usage of minherit() on NetBSD and other platforms that define
5150 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
5151 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
5153 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
5154 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5155 implemenation) when failing to load an onion service client
5156 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5158 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
5159 - When purging the DNS cache because of an out-of-memory condition,
5160 try purging just the older entries at first. Previously, we would
5161 always purge the whole thing. Fixes bug 29617; bugfix
5164 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
5165 - Avoid crashing in our tor_vasprintf() implementation on systems
5166 that define neither vasprintf() nor _vscprintf(). (This bug has
5167 been here long enough that we question whether people are running
5168 Tor on such systems, but we're applying the fix out of caution.)
5169 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5172 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
5173 - Remove overly strict assertions that triggered when a pluggable
5174 transport failed to launch. Fixes bug 31091; bugfix
5176 - Remove an assertion in the Unix process backend. This assertion
5177 would trigger when we failed to find the executable for a child
5178 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5180 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5181 - Avoid crashing when starting with a corrupt keys directory where
5182 the old ntor key and the new ntor key are identical. Fixes bug
5183 30916; bugfix on 0.2.4.8-alpha.
5185 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5186 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5187 31463; bugfix on 0.3.5.4-alpha.
5189 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5190 - When testing port rebinding, don't busy-wait for tor to log.
5191 Instead, actually sleep for a short time before polling again.
5192 Also improve the formatting of control commands and log messages.
5193 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5195 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5196 - Log bugs about the TLS read buffer's length only once, rather than
5197 filling the logs with similar warnings. Fixes bug 31939; bugfix
5200 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5201 - Always retry v2 single onion service intro and rend circuits with
5202 a 3-hop path. Previously, v2 single onion services used a 3-hop
5203 path when rendezvous circuits were retried after a remote or
5204 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5205 23818; bugfix on 0.2.9.3-alpha.
5206 - Make v3 single onion services fall back to a 3-hop intro, when all
5207 intro points are unreachable via a 1-hop path. Previously, v3
5208 single onion services failed when all intro nodes were unreachable
5209 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5211 o Documentation (backport from 0.4.2.1-alpha):
5212 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5213 notice.html so that operators no longer have to host it
5214 themselves. Closes ticket 31089.
5216 o Testing (backport from 0.4.1.2-alpha):
5217 - Specify torrc paths (with empty files) when launching tor in
5218 integration tests; refrain from reading user and system torrcs.
5219 Resolves issue 29702.
5221 o Testing (continuous integration, backport from 0.4.1.1-alpha):
5222 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5224 o Testing (continuous integration, backport from 0.4.1.5):
5225 - In Travis, make stem log a controller trace to the console, and
5226 tail stem's tor log after failure. Closes ticket 30591.
5227 - In Travis, only run the stem tests that use a tor binary. Closes
5230 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5231 - Disable all but one Travis CI macOS build, to mitigate slow
5232 scheduling of Travis macOS jobs. Closes ticket 32177.
5233 - Run the chutney IPv6 networks as part of Travis CI. Closes
5235 - Simplify the Travis CI build matrix, and optimise for build time.
5236 Closes ticket 31859.
5237 - Use Windows Server 2019 instead of Windows Server 2016 in our
5238 Appveyor builds. Closes ticket 32086.
5240 o Testing (continuous integration, backport from 0.4.2.4-rc):
5241 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5242 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5243 until we can fix some Bionic permissions issues (see ticket
5244 32240). Related to ticket 31919.
5245 - Install the mingw OpenSSL package in Appveyor. This makes sure
5246 that the OpenSSL headers and libraries match in Tor's Appveyor
5247 builds. (This bug was triggered by an Appveyor image update.)
5248 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5249 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5251 o Testing (continuous integration, backport from 0.4.2.5):
5252 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5253 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5254 Build some jobs with -std=gnu99, and some jobs without.
5255 Closes ticket 32500.
5257 Changes in version 0.3.5.9 - 2019-12-09
5258 Tor 0.3.5.9 backports serveral fixes from later releases, including
5259 several that affect bridge users, relay stability, onion services,
5262 o Directory authority changes (backport from 0.4.1.5):
5263 - The directory authority "dizum" has a new IP address. Closes
5266 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
5267 - Consider our directory information to have changed when our list
5268 of bridges changes. Previously, Tor would not re-compute the
5269 status of its directory information when bridges changed, and
5270 therefore would not realize that it was no longer able to build
5271 circuits. Fixes part of bug 29875.
5272 - Do not count previously configured working bridges towards our
5273 total of working bridges. Previously, when Tor's list of bridges
5274 changed, it would think that the old bridges were still usable,
5275 and delay fetching router descriptors for the new ones. Fixes part
5276 of bug 29875; bugfix on 0.3.0.1-alpha.
5278 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
5279 - When considering upgrading circuits from "waiting for guard" to
5280 "open", always ignore circuits that are marked for close. Otherwise,
5281 we can end up in the situation where a subsystem is notified that
5282 a closing circuit has just opened, leading to undesirable
5283 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5285 o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc):
5286 - When running with NSS, disable TLS 1.2 ciphersuites that use
5287 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
5288 these ciphersuites don't work -- which caused relays to fail to
5289 handshake with one another when these ciphersuites were enabled.
5290 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
5292 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
5293 - Properly clean up the introduction point map when circuits change
5294 purpose from onion service circuits to pathbias, measurement, or
5295 other circuit types. This should fix some service-side instances
5296 of introduction point failure. Fixes bug 29034; bugfix
5299 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
5300 - Fix an unreachable bug in which an introduction point could try to
5301 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5302 to encode, leading the relay to assert(). We've consolidated the
5303 ABI values into Trunnel now. Fixes bug 30454; bugfix
5305 - Clients can now handle unknown status codes from INTRODUCE_ACK
5306 cells. (The NACK behavior will stay the same.) This will allow us
5307 to extend status codes in the future without breaking the normal
5308 client behavior. Fixes another part of bug 30454; bugfix
5311 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5312 - Stop ignoring torrc options after an %include directive, when the
5313 included directory ends with a file that does not contain any
5314 config options (but does contain comments or whitespace). Fixes
5315 bug 31408; bugfix on 0.3.1.1-alpha.
5317 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
5318 - Onion services now always use the exact number of intro points
5319 configured with the HiddenServiceNumIntroductionPoints option (or
5320 fewer if nodes are excluded). Before, a service could sometimes
5321 pick more intro points than configured. Fixes bug 31548; bugfix
5324 o Minor features (address selection, backport from 0.4.0.3-alpha):
5325 - Treat the subnet 100.64.0.0/10 as public for some purposes;
5326 private for others. This subnet is the RFC 6598 (Carrier Grade
5327 NAT) IP range, and is deployed by many ISPs as an alternative to
5328 RFC 1918 that does not break existing internal networks. Tor now
5329 blocks SOCKS and control ports on these addresses and warns users
5330 if client ports or ExtORPorts are listening on a RFC 6598 address.
5331 Closes ticket 28525. Patch by Neel Chauhan.
5333 o Minor features (bandwidth authority, backport from 0.4.0.4-rc):
5334 - Make bandwidth authorities ignore relays that are reported in the
5335 bandwidth file with the flag "vote=0". This change allows us to
5336 report unmeasured relays for diagnostic reasons without including
5337 their bandwidth in the bandwidth authorities' vote. Closes
5340 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
5341 - Add a "--list-modules" command to print a list of which compile-
5342 time modules are enabled. Closes ticket 30452.
5344 o Minor features (continuous integration, backport from 0.4.0.4-rc):
5345 - On Travis Rust builds, cleanup Rust registry and refrain from
5346 caching the "target/" directory to speed up builds. Resolves
5349 o Minor features (continuous integration, backport from 0.4.0.5):
5350 - In Travis, tell timelimit to use stem's backtrace signals, and
5351 launch python directly from timelimit, so python receives the
5352 signals from timelimit, rather than make. Closes ticket 30117.
5354 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
5355 - Remove sudo configuration lines from .travis.yml as they are no
5356 longer needed with current Travis build environment. Resolves
5359 o Minor features (continuous integration, backport from 0.4.1.4-rc):
5360 - Our Travis configuration now uses Chutney to run some network
5361 integration tests automatically. Closes ticket 29280.
5363 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
5364 - When building on Appveyor and Travis, pass the "-k" flag to make,
5365 so that we are informed of all compilation failures, not just the
5366 first one or two. Closes ticket 31372.
5368 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
5369 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5370 in December 2018 (of which ~122 were still functional), with a
5371 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5372 in June 2019. Closes ticket 28795.
5374 o Minor features (geoip, backport from 0.4.2.5):
5375 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5376 Country database. Closes ticket 32685.
5378 o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc):
5379 - Try to log an error from NSS (if there is any) and a more useful
5380 description of our situation if we are using NSS and a call to
5381 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
5383 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5384 - Change "make test-stem" so it only runs the stem tests that use
5385 tor. This change makes test-stem faster and more reliable. Closes
5388 o Minor bugfixes (security, backport from 0.4.0.4-rc):
5389 - Verify in more places that we are not about to create a buffer
5390 with more than INT_MAX bytes, to avoid possible OOB access in the
5391 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
5392 fixed by Tobias Stoeckmann.
5393 - Fix a potential double free bug when reading huge bandwidth files.
5394 The issue is not exploitable in the current Tor network because
5395 the vulnerable code is only reached when directory authorities
5396 read bandwidth files, but bandwidth files come from a trusted
5397 source (usually the authorities themselves). Furthermore, the
5398 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
5399 which are not used by any of the current authorities. Fixes bug
5400 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
5403 o Minor bugfix (continuous integration, backport from 0.4.0.4-rc):
5404 - Reset coverage state on disk after Travis CI has finished. This
5405 should prevent future coverage merge errors from causing the test
5406 suite for the "process" subsystem to fail. The process subsystem
5407 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
5409 - Terminate test-stem if it takes more than 9.5 minutes to run.
5410 (Travis terminates the job after 10 minutes of no output.)
5411 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
5413 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5414 - Avoid spurious errors when Appveyor CI fails before the install step.
5415 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5417 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5418 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5419 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5421 o Minor bugfixes (C correctness, backport from 0.4.0.4-rc):
5422 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
5423 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
5426 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
5427 - Fix a logic error that prevented the SessionGroup sub-option from
5428 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5430 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5431 - Fix a BUG() assertion that occurs within a very small race window
5432 between when a client intro circuit opens and when its descriptor
5433 gets cleaned up from the cache. The circuit is now closed early,
5434 which will trigger a re-fetch of the descriptor and continue the
5435 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5437 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
5438 - Don't believe clock skew results from NETINFO cells that appear to
5439 arrive before we sent the VERSIONS cells they are responding to.
5440 Previously, we would accept them up to 3 minutes "in the past".
5441 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5443 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
5444 - Fix a compilation warning on Windows about casting a function
5445 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5448 o Minor bugfixes (compilation, backport from 0.4.0.2-alpha):
5449 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
5450 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
5452 o Minor bugfixes (compilation, backport from 0.4.1.5):
5453 - Avoid using labs() on time_t, which can cause compilation warnings
5454 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5456 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5457 - Suppress spurious float-conversion warnings from GCC when calling
5458 floating-point classifier functions on FreeBSD. Fixes part of bug
5459 31687; bugfix on 0.3.1.5-alpha.
5461 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
5462 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5463 due to missing declarations of abort(), and prevent other such
5464 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5466 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
5467 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5468 want authentication along with configured (but unused!)
5469 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5471 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5472 - Avoid trying to read data from closed connections, which can cause
5473 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5474 30344; bugfix on 0.1.1.1-alpha.
5476 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
5477 - Allow the test-stem job to fail in Travis, because it sometimes
5478 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5479 - Skip test_rebind on macOS in Travis, because it is unreliable on
5480 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5481 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5482 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5484 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
5485 - Avoid a set of possible code paths that could try to use freed
5486 memory in routerlist_free() while Tor was exiting. Fixes bug
5487 31003; bugfix on 0.1.2.2-alpha.
5489 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
5490 - Stop crashing after parsing an unknown descriptor purpose
5491 annotation. We think this bug can only be triggered by modifying a
5492 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5494 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
5495 - Move the "bandwidth-file-headers" line in directory authority
5496 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5499 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5500 - On abort, try harder to flush the output buffers of log messages.
5501 On some platforms (macOS), log messages could be discarded when
5502 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5503 - Report the tor version whenever an assertion fails. Previously, we
5504 only reported the Tor version on some crashes, and some non-fatal
5505 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5507 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5508 - When extracting an IPv6 address from a PF-based proxy, verify that
5509 we are actually configured to receive an IPv6 address, and log an
5510 internal error if not. Fixes part of bug 31687; bugfix
5513 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5514 - When tor is missing descriptors for some primary entry guards,
5515 make the log message less alarming. It's normal for descriptors to
5516 expire, as long as tor fetches new ones soon after. Fixes bug
5517 31657; bugfix on 0.3.3.1-alpha.
5519 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
5520 - Avoid logging that we are relaxing a circuit timeout when that
5521 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
5523 o Minor bugfixes (logging, backport from 0.4.0.3-alpha):
5524 - Correct a misleading error message when IPv4Only or IPv6Only is
5525 used but the resolved address can not be interpreted as an address
5526 of the specified IP version. Fixes bug 13221; bugfix on
5527 0.2.3.9-alpha. Patch from Kris Katterjohn.
5528 - Log the correct port number for listening sockets when "auto" is
5529 used to let Tor pick the port number. Previously, port 0 was
5530 logged instead of the actual port number. Fixes bug 29144; bugfix
5531 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
5532 - Stop logging a BUG() warning when Tor is waiting for exit
5533 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
5535 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
5536 - Do not log a warning when running with an OpenSSL version other
5537 than the one Tor was compiled with, if the two versions should be
5538 compatible. Previously, we would warn whenever the version was
5539 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5541 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5542 - Change log level of message "Hash of session info was not as
5543 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5546 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5547 - Rate-limit our the logging message about the obsolete .exit
5548 notation. Previously, there was no limit on this warning, which
5549 could potentially be triggered many times by a hostile website.
5550 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5552 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5553 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5554 cell on a connection using the obsolete v1 link protocol. Log a
5555 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5557 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5558 - Reset the periodic events' "enabled" flag when Tor is shut down
5559 cleanly. Previously, this flag was left on, which caused periodic
5560 events not to be re-enabled when Tor was relaunched in-process
5561 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5564 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
5565 - Avoid a minor memory leak that could occur on relays when failing
5566 to create a "keys" directory. Fixes bug 30148; bugfix
5569 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
5570 - Fix a trivial memory leak when parsing an invalid value
5571 from a download schedule in the configuration. Fixes bug
5572 30894; bugfix on 0.3.4.1-alpha.
5574 o Minor bugfixes (memory management, backport from 0.4.0.3-alpha):
5575 - Refactor the shared random state's memory management so that it
5576 actually takes ownership of the shared random value pointers.
5577 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
5579 o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha):
5580 - Stop leaking parts of the shared random state in the shared-random
5581 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
5583 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
5584 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5585 implemenation) when failing to load an onion service client
5586 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5588 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
5589 - When purging the DNS cache because of an out-of-memory condition,
5590 try purging just the older entries at first. Previously, we would
5591 always purge the whole thing. Fixes bug 29617; bugfix
5594 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
5595 - Avoid crashing in our tor_vasprintf() implementation on systems
5596 that define neither vasprintf() nor _vscprintf(). (This bug has
5597 been here long enough that we question whether people are running
5598 Tor on such systems, but we're applying the fix out of caution.)
5599 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5602 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5603 - Avoid crashing when starting with a corrupt keys directory where
5604 the old ntor key and the new ntor key are identical. Fixes bug
5605 30916; bugfix on 0.2.4.8-alpha.
5607 o Minor bugfixes (rust, backport from 0.4.0.5):
5608 - Abort on panic in all build profiles, instead of potentially
5609 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
5611 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5612 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5613 31463; bugfix on 0.3.5.4-alpha.
5615 o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha):
5616 - Allow connections to single onion services to remain idle without
5617 being disconnected. Previously, relays acting as rendezvous points
5618 for single onion services were mistakenly closing idle rendezvous
5619 circuits after 60 seconds, thinking that they were unused
5620 directory-fetching circuits that had served their purpose. Fixes
5621 bug 29665; bugfix on 0.2.1.26.
5623 o Minor bugfixes (stats, backport from 0.4.0.3-alpha):
5624 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
5625 relay and bridge extra-info documents. Fixes bug 29017; bugfix
5628 o Minor bugfixes (testing, backport from 0.4.0.3-alpha):
5629 - Downgrade some LOG_ERR messages in the address/* tests to
5630 warnings. The LOG_ERR messages were occurring when we had no
5631 configured network. We were failing the unit tests, because we
5632 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
5633 29530; bugfix on 0.3.5.8.
5634 - Fix our gcov wrapper script to look for object files at the
5635 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
5637 o Minor bugfixes (testing, backport from 0.4.0.4-rc):
5638 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
5639 recent test-network.sh to use new chutney features in CI. Fixes
5640 bug 29703; bugfix on 0.2.9.1-alpha.
5641 - Fix a test failure on Windows caused by an unexpected "BUG"
5642 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
5645 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5646 - When testing port rebinding, don't busy-wait for tor to log.
5647 Instead, actually sleep for a short time before polling again.
5648 Also improve the formatting of control commands and log messages.
5649 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5651 o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc):
5652 - When classifying a client's selection of TLS ciphers, if the
5653 client ciphers are not yet available, do not cache the result.
5654 Previously, we had cached the unavailability of the cipher list
5655 and never looked again, which in turn led us to assume that the
5656 client only supported the ancient V1 link protocol. This, in turn,
5657 was causing Stem integration tests to stall in some cases. Fixes
5658 bug 30021; bugfix on 0.2.4.8-alpha.
5660 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5661 - Log bugs about the TLS read buffer's length only once, rather than
5662 filling the logs with similar warnings. Fixes bug 31939; bugfix
5665 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5666 - Always retry v2 single onion service intro and rend circuits with
5667 a 3-hop path. Previously, v2 single onion services used a 3-hop
5668 path when rendezvous circuits were retried after a remote or
5669 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5670 23818; bugfix on 0.2.9.3-alpha.
5671 - Make v3 single onion services fall back to a 3-hop intro, when all
5672 intro points are unreachable via a 1-hop path. Previously, v3
5673 single onion services failed when all intro nodes were unreachable
5674 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5676 o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha):
5677 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
5678 Windows Server 2012 R2 job. The remaining 2 jobs still provide
5679 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
5680 fast_finish, so failed jobs terminate the build immediately. Fixes
5681 bug 29601; bugfix on 0.3.5.4-alpha.
5683 o Documentation (backport from 0.4.2.1-alpha):
5684 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5685 notice.html so that operators no longer have to host it
5686 themselves. Closes ticket 31089.
5688 o Testing (backport from 0.4.1.2-alpha):
5689 - Specify torrc paths (with empty files) when launching tor in
5690 integration tests; refrain from reading user and system torrcs.
5691 Resolves issue 29702.
5693 o Testing (continuous integration, backport from 0.4.1.1-alpha):
5694 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5696 o Testing (continuous integration, backport from 0.4.1.5):
5697 - In Travis, make stem log a controller trace to the console, and
5698 tail stem's tor log after failure. Closes ticket 30591.
5699 - In Travis, only run the stem tests that use a tor binary. Closes
5702 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5703 - Disable all but one Travis CI macOS build, to mitigate slow
5704 scheduling of Travis macOS jobs. Closes ticket 32177.
5705 - Run the chutney IPv6 networks as part of Travis CI. Closes
5707 - Simplify the Travis CI build matrix, and optimise for build time.
5708 Closes ticket 31859.
5709 - Use Windows Server 2019 instead of Windows Server 2016 in our
5710 Appveyor builds. Closes ticket 32086.
5712 o Testing (continuous integration, backport from 0.4.2.4-rc):
5713 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5714 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5715 until we can fix some Bionic permissions issues (see ticket
5716 32240). Related to ticket 31919.
5717 - Install the mingw OpenSSL package in Appveyor. This makes sure
5718 that the OpenSSL headers and libraries match in Tor's Appveyor
5719 builds. (This bug was triggered by an Appveyor image update.)
5720 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5721 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5723 o Testing (continuous integration, backport from 0.4.2.5):
5724 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5725 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5726 Build some jobs with -std=gnu99, and some jobs without.
5727 Closes ticket 32500.
5729 Changes in version 0.4.2.4-rc - 2019-11-15
5730 Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
5731 several bugs from earlier versions, including a few that would result in
5732 stack traces or incorrect behavior.
5734 o Minor features (build system):
5735 - Make pkg-config use --prefix when cross-compiling, if
5736 PKG_CONFIG_PATH is not set. Closes ticket 32191.
5738 o Minor features (geoip):
5739 - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
5740 Country database. Closes ticket 32440.
5742 o Minor bugfixes (client, onion service v3):
5743 - Fix a BUG() assertion that occurs within a very small race window
5744 between when a client intro circuit opens and when its descriptor
5745 gets cleaned up from the cache. The circuit is now closed early,
5746 which will trigger a re-fetch of the descriptor and continue the
5747 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5749 o Minor bugfixes (code quality):
5750 - Fix "make check-includes" so it runs correctly on out-of-tree
5751 builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
5753 o Minor bugfixes (configuration):
5754 - Log the option name when skipping an obsolete option. Fixes bug
5755 32295; bugfix on 0.4.2.1-alpha.
5757 o Minor bugfixes (crash):
5758 - When running Tor with an option like --verify-config or
5759 --dump-config that does not start the event loop, avoid crashing
5760 if we try to exit early because of an error. Fixes bug 32407;
5761 bugfix on 0.3.3.1-alpha.
5763 o Minor bugfixes (directory):
5764 - When checking if a directory connection is anonymous, test if the
5765 circuit was marked for close before looking at its channel. This
5766 avoids a BUG() stacktrace if the circuit was previously closed.
5767 Fixes bug 31958; bugfix on 0.4.2.1-alpha.
5769 o Minor bugfixes (shellcheck):
5770 - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
5771 32402; bugfix on 0.4.2.1-alpha.
5772 - Start checking most scripts for shellcheck errors again. Fixes bug
5773 32402; bugfix on 0.4.2.1-alpha.
5775 o Testing (continuous integration):
5776 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5777 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5778 until we can fix some Bionic permissions issues (see ticket
5779 32240). Related to ticket 31919.
5780 - Install the mingw OpenSSL package in Appveyor. This makes sure
5781 that the OpenSSL headers and libraries match in Tor's Appveyor
5782 builds. (This bug was triggered by an Appveyor image update.)
5783 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5784 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5787 Changes in version 0.4.2.3-alpha - 2019-10-24
5788 This release fixes several bugs from the previous alpha release, and
5789 from earlier versions of Tor.
5791 o Major bugfixes (relay):
5792 - Relays now respect their AccountingMax bandwidth again. When
5793 relays entered "soft" hibernation (which typically starts when
5794 we've hit 90% of our AccountingMax), we had stopped checking
5795 whether we should enter hard hibernation. Soft hibernation refuses
5796 new connections and new circuits, but the existing circuits can
5797 continue, meaning that relays could have exceeded their configured
5798 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
5800 o Major bugfixes (v3 onion services):
5801 - Onion services now always use the exact number of intro points
5802 configured with the HiddenServiceNumIntroductionPoints option (or
5803 fewer if nodes are excluded). Before, a service could sometimes
5804 pick more intro points than configured. Fixes bug 31548; bugfix
5807 o Minor feature (onion services, control port):
5808 - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
5809 (v3) onion services. Previously it defaulted to RSA1024 (v2).
5810 Closes ticket 29669.
5812 o Minor features (testing):
5813 - When running tests that attempt to look up hostnames, replace the
5814 libc name lookup functions with ones that do not actually touch
5815 the network. This way, the tests complete more quickly in the
5816 presence of a slow or missing DNS resolver. Closes ticket 31841.
5818 o Minor features (testing, continuous integration):
5819 - Disable all but one Travis CI macOS build, to mitigate slow
5820 scheduling of Travis macOS jobs. Closes ticket 32177.
5821 - Run the chutney IPv6 networks as part of Travis CI. Closes
5823 - Simplify the Travis CI build matrix, and optimise for build time.
5824 Closes ticket 31859.
5825 - Use Windows Server 2019 instead of Windows Server 2016 in our
5826 Appveyor builds. Closes ticket 32086.
5828 o Minor bugfixes (build system):
5829 - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
5830 32124; bugfix on 0.3.4.1-alpha.
5831 - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
5833 - Stop failing when jemalloc is requested, but tcmalloc is not
5834 found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
5835 - When pkg-config is not installed, or a library that depends on
5836 pkg-config is not found, tell the user what to do to fix the
5837 problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
5839 o Minor bugfixes (connections):
5840 - Avoid trying to read data from closed connections, which can cause
5841 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5842 30344; bugfix on 0.1.1.1-alpha.
5844 o Minor bugfixes (error handling):
5845 - Always lock the backtrace buffer before it is used. Fixes bug
5846 31734; bugfix on 0.2.5.3-alpha.
5848 o Minor bugfixes (mainloop, periodic events, in-process API):
5849 - Reset the periodic events' "enabled" flag when Tor is shut down
5850 cleanly. Previously, this flag was left on, which caused periodic
5851 events not to be re-enabled when Tor was relaunched in-process
5852 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5855 o Minor bugfixes (process management):
5856 - Remove overly strict assertions that triggered when a pluggable
5857 transport failed to launch. Fixes bug 31091; bugfix
5859 - Remove an assertion in the Unix process backend. This assertion
5860 would trigger when we failed to find the executable for a child
5861 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5863 o Minor bugfixes (testing):
5864 - Avoid intermittent test failures due to a test that had relied on
5865 inconsistent timing sources. Fixes bug 31995; bugfix
5867 - When testing port rebinding, don't busy-wait for tor to log.
5868 Instead, actually sleep for a short time before polling again.
5869 Also improve the formatting of control commands and log messages.
5870 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5872 o Minor bugfixes (tls, logging):
5873 - Log bugs about the TLS read buffer's length only once, rather than
5874 filling the logs with similar warnings. Fixes bug 31939; bugfix
5877 o Minor bugfixes (v3 onion services):
5878 - Fix an implicit conversion from ssize_t to size_t discovered by
5879 Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
5880 - Fix a memory leak in an unlikely error code path when encoding HS
5881 DoS establish intro extension cell. Fixes bug 32063; bugfix
5883 - When cleaning up intro circuits for a v3 onion service, don't
5884 remove circuits that have an established or pending circuit, even
5885 if they ran out of retries. This way, we don't remove a circuit on
5886 its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
5889 - Correct the description of "GuardLifetime". Fixes bug 31189;
5890 bugfix on 0.3.0.1-alpha.
5891 - Make clear in the man page, in both the bandwidth section and the
5892 AccountingMax section, that Tor counts in powers of two, not
5893 powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
5894 bytes. Resolves ticket 32106.
5897 Changes in version 0.4.2.2-alpha - 2019-10-07
5898 This release fixes several bugs from the previous alpha release, and
5899 from earlier versions. It also includes a change in authorities, so
5900 that they begin to reject the currently unsupported release series.
5902 o Major features (directory authorities):
5903 - Directory authorities now reject relays running all currently
5904 deprecated release series. The currently supported release series
5905 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
5907 o Major bugfixes (embedded Tor):
5908 - Avoid a possible crash when restarting Tor in embedded mode and
5909 enabling a different set of publish/subscribe messages. Fixes bug
5910 31898; bugfix on 0.4.1.1-alpha.
5912 o Major bugfixes (torrc parsing):
5913 - Stop ignoring torrc options after an %include directive, when the
5914 included directory ends with a file that does not contain any
5915 config options (but does contain comments or whitespace). Fixes
5916 bug 31408; bugfix on 0.3.1.1-alpha.
5918 o Minor features (auto-formatting scripts):
5919 - When annotating C macros, never generate a line that our check-
5920 spaces script would reject. Closes ticket 31759.
5921 - When annotating C macros, try to remove cases of double-negation.
5922 Closes ticket 31779.
5924 o Minor features (continuous integration):
5925 - When building on Appveyor and Travis, pass the "-k" flag to make,
5926 so that we are informed of all compilation failures, not just the
5927 first one or two. Closes ticket 31372.
5929 o Minor features (geoip):
5930 - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
5931 Country database. Closes ticket 31931.
5933 o Minor features (maintenance scripts):
5934 - Add a Coccinelle script to detect bugs caused by incrementing or
5935 decrementing a variable inside a call to log_debug(). Since
5936 log_debug() is a macro whose arguments are conditionally
5937 evaluated, it is usually an error to do this. One such bug was
5938 30628, in which SENDME cells were miscounted by a decrement
5939 operator inside a log_debug() call. Closes ticket 30743.
5941 o Minor features (onion services v3):
5942 - Assist users who try to setup v2 client authorization in v3 onion
5943 services by pointing them to the right documentation. Closes
5946 o Minor bugfixes (Appveyor continuous integration):
5947 - Avoid spurious errors when Appveyor CI fails before the install
5948 step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5950 o Minor bugfixes (best practices tracker):
5951 - When listing overbroad exceptions, do not also list problems, and
5952 do not list insufficiently broad exceptions. Fixes bug 31338;
5953 bugfix on 0.4.2.1-alpha.
5955 o Minor bugfixes (controller protocol):
5956 - Fix the MAPADDRESS controller command to accept one or more
5957 arguments. Previously, it required two or more arguments, and
5958 ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
5960 o Minor bugfixes (logging):
5961 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
5962 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
5963 - Disable backtrace signal handlers when shutting down tor. Fixes
5964 bug 31614; bugfix on 0.2.5.2-alpha.
5965 - Rate-limit our the logging message about the obsolete .exit
5966 notation. Previously, there was no limit on this warning, which
5967 could potentially be triggered many times by a hostile website.
5968 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5969 - When initialising log domain masks, only set known log domains.
5970 Fixes bug 31854; bugfix on 0.2.1.1-alpha.
5972 o Minor bugfixes (logging, protocol violations):
5973 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5974 cell on a connection using the obsolete v1 link protocol. Log a
5975 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5977 o Minor bugfixes (modules):
5978 - Explain what the optional Directory Authority module is, and what
5979 happens when it is disabled. Fixes bug 31825; bugfix
5982 o Minor bugfixes (multithreading):
5983 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
5984 31736; bugfix on 0.0.7.
5986 o Minor bugfixes (relay):
5987 - Avoid crashing when starting with a corrupt keys directory where
5988 the old ntor key and the new ntor key are identical. Fixes bug
5989 30916; bugfix on 0.2.4.8-alpha.
5991 o Minor bugfixes (tests, SunOS):
5992 - Avoid a map_anon_nofork test failure due to a signed/unsigned
5993 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
5995 o Code simplification and refactoring:
5996 - Refactor connection_control_process_inbuf() to reduce the size of
5997 a practracker exception. Closes ticket 31840.
5998 - Refactor the microdescs_parse_from_string() function into smaller
5999 pieces, for better comprehensibility. Closes ticket 31675.
6000 - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
6001 tests and fuzzers, rather than using hard-coded values. Closes
6003 - Interface for function `decrypt_desc_layer` cleaned up. Closes
6007 - Document the signal-safe logging behaviour in the tor man page.
6008 Also add some comments to the relevant functions. Closes
6010 - Explain why we can't destroy the backtrace buffer mutex. Explain
6011 why we don't need to destroy the log mutex. Closes ticket 31736.
6012 - The Tor source code repository now includes a (somewhat dated)
6013 description of Tor's modular architecture, in doc/HACKING/design.
6014 This is based on the old "tor-guts.git" repository, which we are
6015 adopting and superseding. Closes ticket 31849.
6018 Changes in version 0.4.1.6 - 2019-09-19
6019 This release backports several bugfixes to improve stability and
6020 correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
6021 or experiencing reliability issues with single onion services, should
6024 o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
6025 - Tolerate systems (including some Android installations) where
6026 madvise and MADV_DONTDUMP are available at build-time, but not at
6027 run time. Previously, these systems would notice a failed syscall
6028 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
6029 - Tolerate systems (including some Linux installations) where
6030 madvise and/or MADV_DONTFORK are available at build-time, but not
6031 at run time. Previously, these systems would notice a failed
6032 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
6034 o Minor features (stem tests, backport from 0.4.2.1-alpha):
6035 - Change "make test-stem" so it only runs the stem tests that use
6036 tor. This change makes test-stem faster and more reliable. Closes
6039 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
6040 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
6041 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
6043 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
6044 - Add more stub functions to fix compilation on Android with link-
6045 time optimization when --disable-module-dirauth is used.
6046 Previously, these compilation settings would make the compiler
6047 look for functions that didn't exist. Fixes bug 31552; bugfix
6049 - Suppress spurious float-conversion warnings from GCC when calling
6050 floating-point classifier functions on FreeBSD. Fixes part of bug
6051 31687; bugfix on 0.3.1.5-alpha.
6053 o Minor bugfixes (controller protocol):
6054 - Fix the MAPADDRESS controller command to accept one or more
6055 arguments. Previously, it required two or more arguments, and ignored
6056 the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
6058 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
6059 - When extracting an IPv6 address from a PF-based proxy, verify that
6060 we are actually configured to receive an IPv6 address, and log an
6061 internal error if not. Fixes part of bug 31687; bugfix
6064 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
6065 - When tor is missing descriptors for some primary entry guards,
6066 make the log message less alarming. It's normal for descriptors to
6067 expire, as long as tor fetches new ones soon after. Fixes bug
6068 31657; bugfix on 0.3.3.1-alpha.
6070 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
6071 - Change log level of message "Hash of session info was not as
6072 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
6075 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
6076 - Correctly exclude a redundant rust build job in Travis. Fixes bug
6077 31463; bugfix on 0.3.5.4-alpha.
6079 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
6080 - Always retry v2 single onion service intro and rend circuits with
6081 a 3-hop path. Previously, v2 single onion services used a 3-hop
6082 path when rendezvous circuits were retried after a remote or
6083 delayed failure, but a 1-hop path for immediate retries. Fixes bug
6084 23818; bugfix on 0.2.9.3-alpha.
6086 o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
6087 - Always retry v3 single onion service intro and rend circuits with
6088 a 3-hop path. Previously, v3 single onion services used a 3-hop
6089 path when rend circuits were retried after a remote or delayed
6090 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
6091 bugfix on 0.3.2.1-alpha.
6092 - Make v3 single onion services fall back to a 3-hop intro, when all
6093 intro points are unreachable via a 1-hop path. Previously, v3
6094 single onion services failed when all intro nodes were unreachable
6095 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6097 o Documentation (backport from 0.4.2.1-alpha):
6098 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6099 notice.html so that operators no longer have to host it
6100 themselves. Closes ticket 31089.
6103 Changes in version 0.4.2.1-alpha - 2019-09-17
6104 This is the first alpha release in the 0.4.2.x series. It adds new
6105 defenses for denial-of-service attacks against onion services. It also
6106 includes numerous kinds of bugfixes and refactoring to help improve
6107 Tor's stability and ease of development.
6109 o Major features (onion service v3, denial of service):
6110 - Add onion service introduction denial of service defenses. Intro
6111 points can now rate-limit client introduction requests, using
6112 parameters that can be sent by the service within the
6113 ESTABLISH_INTRO cell. If the cell extension for this is not used,
6114 the intro point will honor the consensus parameters. Closes
6117 o Major bugfixes (circuit build, guard):
6118 - When considering upgrading circuits from "waiting for guard" to
6119 "open", always ignore circuits that are marked for close.
6120 Previously we could end up in the situation where a subsystem is
6121 notified of a circuit opening, but the circuit is still marked for
6122 close, leading to undesirable behavior. Fixes bug 30871; bugfix
6125 o Major bugfixes (crash, Linux, Android):
6126 - Tolerate systems (including some Android installations) where
6127 madvise and MADV_DONTDUMP are available at build-time, but not at
6128 run time. Previously, these systems would notice a failed syscall
6129 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
6130 - Tolerate systems (including some Linux installations) where
6131 madvise and/or MADV_DONTFORK are available at build-time, but not
6132 at run time. Previously, these systems would notice a failed
6133 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
6135 o Minor features (best practices tracker):
6136 - Our best-practices tracker now integrates with our include-checker
6137 tool to keep track of how many layering violations we have not yet
6138 fixed. We hope to reduce this number over time to improve Tor's
6139 modularity. Closes ticket 31176.
6140 - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
6141 practracker from the environment. We may want this for continuous
6142 integration. Closes ticket 31309.
6143 - Give a warning rather than an error when a practracker exception
6144 is violated by a small amount, add a --list-overbroad option to
6145 practracker that lists exceptions that are stricter than they need
6146 to be, and provide an environment variable for disabling
6147 practracker. Closes ticket 30752.
6148 - Our best-practices tracker now looks at headers as well as C
6149 files. Closes ticket 31175.
6151 o Minor features (build system):
6152 - Add --disable-manpage and --disable-html-manual options to
6153 configure script. This will enable shortening build times by not
6154 building documentation. Resolves issue 19381.
6156 o Minor features (compilation):
6157 - Log a more useful error message when we are compiling and one of
6158 the compile-time hardening options we have selected can be linked
6159 but not executed. Closes ticket 27530.
6161 o Minor features (configuration):
6162 - The configuration code has been extended to allow splitting
6163 configuration data across multiple objects. Previously, all
6164 configuration data needed to be kept in a single object, which
6165 tended to become bloated. Closes ticket 31240.
6167 o Minor features (continuous integration):
6168 - When running CI builds on Travis, put some random data in
6169 ~/.torrc, to make sure no tests are reading the Tor configuration
6170 file from its default location. Resolves issue 30102.
6172 o Minor features (debugging):
6173 - Log a nonfatal assertion failure if we encounter a configuration
6174 line whose command is "CLEAR" but which has a nonempty value. This
6175 should be impossible, according to the rules of our configuration
6176 line parsing. Closes ticket 31529.
6178 o Minor features (git hooks):
6179 - Our pre-commit git hook now checks for a special file before
6180 running practracker, so that practracker only runs on branches
6181 that are based on master. Since the pre-push hook calls the pre-
6182 commit hook, practracker will also only run before pushes of
6183 branches based on master. Closes ticket 30979.
6185 o Minor features (git scripts):
6186 - Add a "--" command-line argument, to separate git-push-all.sh
6187 script arguments from arguments that are passed through to git
6188 push. Closes ticket 31314.
6189 - Add a -r <remote-name> argument to git-push-all.sh, so the script
6190 can push test branches to a personal remote. Closes ticket 31314.
6191 - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
6192 git-push-all.sh, which makes these scripts create, merge forward,
6193 and push test branches. Closes ticket 31314.
6194 - Add a -u argument to git-merge-forward.sh, so that the script can
6195 re-use existing test branches after a merge failure and fix.
6196 Closes ticket 31314.
6197 - Add a TOR_GIT_PUSH env var, which sets the default git push
6198 command and arguments for git-push-all.sh. Closes ticket 31314.
6199 - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
6200 script push master and maint branches with a delay between each
6201 branch. These delays trigger the CI jobs in a set order, which
6202 should show the most likely failures first. Also make pushes
6203 atomic by default, and make the script pass any command-line
6204 arguments to git push. Closes ticket 29879.
6205 - Call the shellcheck script from the pre-commit hook. Closes
6207 - Skip pushing test branches that are the same as a remote
6208 maint/release/master branch in git-push-all.sh by default. Add a
6209 -s argument, so git-push-all.sh can push all test branches. Closes
6212 o Minor features (IPv6, logging):
6213 - Log IPv6 addresses as well as IPv4 addresses when describing
6214 routerinfos, routerstatuses, and nodes. Closes ticket 21003.
6216 o Minor features (onion service v3):
6217 - Do not allow single hop clients to fetch or post an HS descriptor
6218 from an HSDir. Closes ticket 24964.
6220 o Minor features (onion service):
6221 - Disallow single-hop clients at the introduction point. We've
6222 removed Tor2web support a while back and single-hop rendezvous
6223 attempts are blocked at the relays. This change should remove load
6224 off the network from spammy clients. Close ticket 24963.
6226 o Minor features (stem tests):
6227 - Change "make test-stem" so it only runs the stem tests that use
6228 tor. This change makes test-stem faster and more reliable. Closes
6231 o Minor features (testing):
6232 - Add a script to invoke "tor --dump-config" and "tor
6233 --verify-config" with various configuration options, and see
6234 whether tor's resulting configuration or error messages are what
6235 we expect. Use it for integration testing of our +Option and
6236 /Option flags. Closes ticket 31637.
6237 - Improve test coverage for our existing configuration parsing and
6238 management API. Closes ticket 30893.
6239 - Add integration tests to make sure that practracker gives the
6240 outputs we expect. Closes ticket 31477.
6241 - The practracker self-tests are now run as part of the Tor test
6242 suite. Closes ticket 31304.
6244 o Minor features (token bucket):
6245 - Implement a generic token bucket that uses a single counter, for
6246 use in anti-DoS onion service work. Closes ticket 30687.
6248 o Minor bugfixes (best practices tracker):
6249 - Fix a few issues in the best-practices script, including tests,
6250 tab tolerance, error reporting, and directory-exclusion logic.
6251 Fixes bug 29746; bugfix on 0.4.1.1-alpha.
6252 - When running check-best-practices, only consider files in the src
6253 subdirectory. Previously we had recursively considered all
6254 subdirectories, which made us get confused by the temporary
6255 directories made by "make distcheck". Fixes bug 31578; bugfix
6258 o Minor bugfixes (build system):
6259 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
6260 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
6262 o Minor bugfixes (chutney, makefiles, documentation):
6263 - "make test-network-all" now shows the warnings from each test-
6264 network.sh run on the console, so developers see new warnings
6265 early. We've also improved the documentation for this feature, and
6266 renamed a Makefile variable so the code is self-documenting. Fixes
6267 bug 30455; bugfix on 0.3.0.4-rc.
6269 o Minor bugfixes (compilation):
6270 - Add more stub functions to fix compilation on Android with link-
6271 time optimization when --disable-module-dirauth is used.
6272 Previously, these compilation settings would make the compiler
6273 look for functions that didn't exist. Fixes bug 31552; bugfix
6275 - Suppress spurious float-conversion warnings from GCC when calling
6276 floating-point classifier functions on FreeBSD. Fixes part of bug
6277 31687; bugfix on 0.3.1.5-alpha.
6279 o Minor bugfixes (configuration):
6280 - Invalid floating-point values in the configuration file are now
6281 treated as errors in the configuration. Previously, they were
6282 ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
6284 o Minor bugfixes (coverity):
6285 - Add an assertion when parsing a BEGIN cell so that coverity can be
6286 sure that we are not about to dereference a NULL address. Fixes
6287 bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
6288 - In our siphash implementation, when building for coverity, use
6289 memcpy in place of a switch statement, so that coverity can tell
6290 we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
6291 on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
6292 - Fix several coverity warnings from our unit tests. Fixes bug
6293 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
6295 o Minor bugfixes (developer tooling):
6296 - Only log git script changes in the post-merge script when the
6297 merge was to the master branch. Fixes bug 31040; bugfix
6300 o Minor bugfixes (directory authorities):
6301 - Return a distinct status when formatting annotations fails. Fixes
6302 bug 30780; bugfix on 0.2.0.8-alpha.
6304 o Minor bugfixes (error handling):
6305 - On abort, try harder to flush the output buffers of log messages.
6306 On some platforms (macOS), log messages could be discarded when
6307 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6308 - Report the tor version whenever an assertion fails. Previously, we
6309 only reported the Tor version on some crashes, and some non-fatal
6310 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6311 - When tor aborts due to an error, close log file descriptors before
6312 aborting. Closing the logs makes some OSes flush log file buffers,
6313 rather than deleting buffered log lines. Fixes bug 31594; bugfix
6316 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
6317 - When extracting an IPv6 address from a PF-based proxy, verify that
6318 we are actually configured to receive an IPv6 address, and log an
6319 internal error if not. Fixes part of bug 31687; bugfix
6322 o Minor bugfixes (git hooks):
6323 - Remove a duplicate call to practracker from the pre-push hook. The
6324 pre-push hook already calls the pre-commit hook, which calls
6325 practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
6327 o Minor bugfixes (git scripts):
6328 - Stop hard-coding the bash path in the git scripts. Some OSes don't
6329 have bash in /usr/bin, others have an ancient bash at this path.
6330 Fixes bug 30840; bugfix on 0.4.0.1-alpha.
6331 - Stop hard-coding the tor master branch name and worktree path in
6332 the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
6333 - Allow git-push-all.sh to be run from any directory. Previously,
6334 the script only worked if run from an upstream worktree directory.
6335 Closes ticket 31678.
6337 o Minor bugfixes (guards):
6338 - When tor is missing descriptors for some primary entry guards,
6339 make the log message less alarming. It's normal for descriptors to
6340 expire, as long as tor fetches new ones soon after. Fixes bug
6341 31657; bugfix on 0.3.3.1-alpha.
6343 o Minor bugfixes (ipv6):
6344 - Check for private IPv6 addresses alongside their IPv4 equivalents
6345 when authorities check descriptors. Previously, we only checked
6346 for private IPv4 addresses. Fixes bug 31088; bugfix on
6347 0.2.3.21-rc. Patch by Neel Chauhan.
6348 - When parsing microdescriptors, we should check the IPv6 exit
6349 policy alongside IPv4. Previously, we checked both exit policies
6350 for only router info structures, while microdescriptors were
6351 IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
6354 o Minor bugfixes (logging):
6355 - Change log level of message "Hash of session info was not as
6356 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
6358 - Fix a code issue that would have broken our parsing of log domains
6359 as soon as we had 33 of them. Fortunately, we still only have 29.
6360 Fixes bug 31451; bugfix on 0.4.1.4-rc.
6362 o Minor bugfixes (memory management):
6363 - Stop leaking a small amount of memory in nt_service_install(), in
6364 unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
6367 o Minor bugfixes (networking, IP addresses):
6368 - When parsing addresses via Tor's internal DNS lookup API, reject
6369 IPv4 addresses in square brackets, and accept IPv6 addresses in
6370 square brackets. This change completes the work started in 23082,
6371 making address parsing consistent between tor's internal DNS
6372 lookup and address parsing APIs. Fixes bug 30721; bugfix
6374 - When parsing addresses via Tor's internal address:port parsing and
6375 DNS lookup APIs, require IPv6 addresses with ports to have square
6376 brackets. But allow IPv6 addresses without ports, whether or not
6377 they have square brackets. Fixes bug 30721; bugfix
6380 o Minor bugfixes (onion service v3):
6381 - When purging the client descriptor cache, close any introduction
6382 point circuits associated with purged cache entries. This avoids
6383 picking those circuits later when connecting to the same
6384 introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
6386 o Minor bugfixes (onion services):
6387 - In the hs_ident_circuit_t data structure, remove the unused field
6388 circuit_type and the respective argument in hs_ident_circuit_new().
6389 This field was set by clients (for introduction) and services (for
6390 introduction and rendezvous) but was never used afterwards. Fixes
6391 bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
6393 o Minor bugfixes (operator tools):
6394 - Make tor-print-ed-signing-cert(1) print certificate expiration
6395 date in RFC 1123 and UNIX timestamp formats, to make output
6396 machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
6398 o Minor bugfixes (rust):
6399 - Correctly exclude a redundant rust build job in Travis. Fixes bug
6400 31463; bugfix on 0.3.5.4-alpha.
6401 - Raise the minimum rustc version to 1.31.0, as checked by configure
6402 and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
6404 o Minor bugfixes (sendme, code structure):
6405 - Rename the trunnel SENDME file definition from sendme.trunnel to
6406 sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
6407 repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
6409 o Minor bugfixes (statistics):
6410 - Stop removing the ed25519 signature if the extra info file is too
6411 big. If the signature data was removed, but the keyword was kept,
6412 this could result in an unparseable extra info file. Fixes bug
6413 30958; bugfix on 0.2.7.2-alpha.
6415 o Minor bugfixes (subsystems):
6416 - Make the subsystem init order match the subsystem module
6417 dependencies. Call windows process security APIs as early as
6418 possible. Initialize logging before network and time, so that
6419 network and time can use logging. Fixes bug 31615; bugfix
6422 o Minor bugfixes (testing):
6423 - Teach the util/socketpair_ersatz test to work correctly when we
6424 have no network stack configured. Fixes bug 30804; bugfix
6427 o Minor bugfixes (v2 single onion services):
6428 - Always retry v2 single onion service intro and rend circuits with
6429 a 3-hop path. Previously, v2 single onion services used a 3-hop
6430 path when rendezvous circuits were retried after a remote or
6431 delayed failure, but a 1-hop path for immediate retries. Fixes bug
6432 23818; bugfix on 0.2.9.3-alpha.
6434 o Minor bugfixes (v3 single onion services):
6435 - Always retry v3 single onion service intro and rend circuits with
6436 a 3-hop path. Previously, v3 single onion services used a 3-hop
6437 path when rend circuits were retried after a remote or delayed
6438 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
6439 bugfix on 0.3.2.1-alpha.
6440 - Make v3 single onion services fall back to a 3-hop intro, when all
6441 intro points are unreachable via a 1-hop path. Previously, v3
6442 single onion services failed when all intro nodes were unreachable
6443 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6446 - Improve documentation in circuit padding subsystem. Patch by
6447 Tobias Pulls. Closes ticket 31113.
6448 - Include an example usage for IPv6 ORPort in our sample torrc.
6449 Closes ticket 31320; patch from Ali Raheem.
6450 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6451 notice.html so that operators no longer have to host it
6452 themselves. Closes ticket 31089.
6455 - No longer include recommended package digests in votes as detailed
6456 in proposal 301. The RecommendedPackages torrc option is
6457 deprecated and will no longer have any effect. "package" lines
6458 will still be considered when computing consensuses for consensus
6459 methods that include them. (This change has no effect on the list
6460 of recommended Tor versions, which is still in use.) Closes
6462 - Remove torctl.in from contrib/dist directory. Resolves
6466 - Run shellcheck for all non-third-party shell scripts that are
6467 shipped with Tor. Closes ticket 29533.
6468 - When checking shell scripts, ignore any user-created directories.
6469 Closes ticket 30967.
6471 o Code simplification and refactoring (config handling):
6472 - Extract our variable manipulation code from confparse.c to a new
6473 lower-level typedvar.h module. Closes ticket 30864.
6474 - Lower another layer of object management from confparse.c to a
6475 more general tool. Now typed structure members are accessible via
6476 an abstract type. Implements ticket 30914.
6477 - Move our backend logic for working with configuration and state
6478 files into a lower-level library, since it no longer depends on
6479 any tor-specific functionality. Closes ticket 31626.
6480 - Numerous simplifications in configuration-handling logic: remove
6481 duplicated macro definitions, replace magical names with flags,
6482 and refactor "TestingTorNetwork" to use the same default-option
6483 logic as the rest of Tor. Closes ticket 30935.
6484 - Replace our ad-hoc set of flags for configuration variables and
6485 configuration variable types with fine-grained orthogonal flags
6486 corresponding to the actual behavior we want. Closes ticket 31625.
6488 o Code simplification and refactoring (misc):
6489 - Eliminate some uses of lower-level control reply abstractions,
6490 primarily in the onion_helper functions. Closes ticket 30889.
6491 - Rework bootstrap tracking to use the new publish-subscribe
6492 subsystem. Closes ticket 29976.
6493 - Rewrite format_node_description() and router_get_verbose_nickname()
6494 to use strlcpy() and strlcat(). The previous implementation used
6495 memcpy() and pointer arithmetic, which was error-prone. Closes
6496 ticket 31545. This is CID 1452819.
6497 - Split extrainfo_dump_to_string() into smaller functions. Closes
6499 - Use the ptrdiff_t type consistently for expressing variable
6500 offsets and pointer differences. Previously we incorrectly (but
6501 harmlessly) used int and sometimes off_t for these cases. Closes
6503 - Use the subsystems mechanism to manage the main event loop code.
6504 Closes ticket 30806.
6505 - Various simplifications and minor improvements to the circuit
6506 padding machines. Patch by Tobias Pulls. Closes tickets 31112
6509 o Documentation (hard-coded directories):
6510 - Improve the documentation for the DirAuthority and FallbackDir
6511 torrc options. Closes ticket 30955.
6513 o Documentation (tor.1 man page):
6514 - Fix typo in tor.1 man page: the option is "--help", not "-help".
6515 Fixes bug 31008; bugfix on 0.2.2.9-alpha.
6518 Changes in version 0.4.1.5 - 2019-08-20
6519 This is the first stable release in the 0.4.1.x series. This series
6520 adds experimental circuit-level padding, authenticated SENDME cells to
6521 defend against certain attacks, and several performance improvements
6522 to save on CPU consumption. It fixes bugs in bootstrapping and v3
6523 onion services. It also includes numerous smaller features and
6524 bugfixes on earlier versions.
6526 Per our support policy, we will support the 0.4.1.x series for nine
6527 months, or until three months after the release of a stable 0.4.2.x:
6528 whichever is longer. If you need longer-term support, please stick
6529 with 0.3.5.x, which will we plan to support until Feb 2022.
6531 Below are the changes since 0.4.1.4-rc. For a complete list of changes
6532 since 0.4.0.5, see the ReleaseNotes file.
6534 o Directory authority changes:
6535 - The directory authority "dizum" has a new IP address. Closes
6538 o Minor features (circuit padding logging):
6539 - Demote noisy client-side warn logs about circuit padding to
6540 protocol warnings. Add additional log messages and circuit ID
6541 fields to help with bug 30992 and any other future issues.
6543 o Minor bugfixes (circuit padding negotiation):
6544 - Bump the circuit padding protocol version to explicitly signify
6545 that the HS setup machine support is finalized in 0.4.1.x-stable.
6546 This also means that 0.4.1.x-alpha clients will not negotiate
6547 padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
6548 will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
6549 relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
6551 o Minor bugfixes (circuit padding):
6552 - Ignore non-padding cells on padding circuits. This addresses
6553 various warning messages from subsystems that were not expecting
6554 padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
6556 o Minor bugfixes (clock skew detection):
6557 - Don't believe clock skew results from NETINFO cells that appear to
6558 arrive before we sent the VERSIONS cells they are responding to.
6559 Previously, we would accept them up to 3 minutes "in the past".
6560 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6562 o Minor bugfixes (compatibility, standards compliance):
6563 - Fix a bug that would invoke undefined behavior on certain
6564 operating systems when trying to asprintf() a string exactly
6565 INT_MAX bytes long. We don't believe this is exploitable, but it's
6566 better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
6567 Found and fixed by Tobias Stoeckmann.
6569 o Minor bugfixes (compilation warning):
6570 - Fix a compilation warning on Windows about casting a function
6571 pointer for GetTickCount64(). Fixes bug 31374; bugfix
6574 o Minor bugfixes (compilation):
6575 - Avoid using labs() on time_t, which can cause compilation warnings
6576 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6578 o Minor bugfixes (distribution):
6579 - Do not ship any temporary files found in the
6580 scripts/maint/practracker directory. Fixes bug 31311; bugfix
6583 o Testing (continuous integration):
6584 - In Travis, make stem log a controller trace to the console, and
6585 tail stem's tor log after failure. Closes ticket 30591.
6586 - In Travis, only run the stem tests that use a tor binary. Closes
6590 Changes in version 0.4.1.4-rc - 2019-07-25
6591 Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
6592 updates to a new list of fallback directories. If no new bugs are
6593 found, the next release in the 0.4.1.x serious should be stable.
6595 o Major bugfixes (circuit build, guard):
6596 - When considering upgrading circuits from "waiting for guard" to
6597 "open", always ignore circuits that are marked for close. Otherwise,
6598 we can end up in the situation where a subsystem is notified that
6599 a closing circuit has just opened, leading to undesirable
6600 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
6602 o Minor features (continuous integration):
6603 - Our Travis configuration now uses Chutney to run some network
6604 integration tests automatically. Closes ticket 29280.
6606 o Minor features (fallback directory list):
6607 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
6608 in December 2018 (of which ~122 were still functional), with a
6609 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
6610 in June 2019. Closes ticket 28795.
6612 o Minor bugfixes (circuit padding):
6613 - On relays, properly check that a padding machine is absent before
6614 logging a warning about it being absent. Fixes bug 30649; bugfix
6616 - Add two NULL checks in unreachable places to silence Coverity (CID
6617 144729 and 1447291) and better future-proof ourselves. Fixes bug
6618 31024; bugfix on 0.4.1.1-alpha.
6620 o Minor bugfixes (crash on exit):
6621 - Avoid a set of possible code paths that could try to use freed
6622 memory in routerlist_free() while Tor was exiting. Fixes bug
6623 31003; bugfix on 0.1.2.2-alpha.
6625 o Minor bugfixes (logging):
6626 - Fix a conflict between the flag used for messaging-domain log
6627 messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
6630 o Minor bugfixes (memory leaks):
6631 - Fix a trivial memory leak when parsing an invalid value from a
6632 download schedule in the configuration. Fixes bug 30894; bugfix
6635 o Code simplification and refactoring:
6636 - Remove some dead code from circpad_machine_remove_token() to fix
6637 some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
6641 Changes in version 0.4.1.3-alpha - 2019-06-25
6642 Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
6643 alpha, most of them from earlier release series.
6645 o Major bugfixes (Onion service reachability):
6646 - Properly clean up the introduction point map when circuits change
6647 purpose from onion service circuits to pathbias, measurement, or
6648 other circuit types. This should fix some service-side instances
6649 of introduction point failure. Fixes bug 29034; bugfix
6652 o Minor features (geoip):
6653 - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
6654 Country database. Closes ticket 30852.
6656 o Minor features (logging):
6657 - Give a more useful assertion failure message if we think we have
6658 minherit() but we fail to make a region non-inheritable. Give a
6659 compile-time warning if our support for minherit() is incomplete.
6660 Closes ticket 30686.
6662 o Minor bugfixes (circuit isolation):
6663 - Fix a logic error that prevented the SessionGroup sub-option from
6664 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
6666 o Minor bugfixes (continuous integration):
6667 - Allow the test-stem job to fail in Travis, because it sometimes
6668 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
6669 - Skip test_rebind on macOS in Travis, because it is unreliable on
6670 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6671 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
6672 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6674 o Minor bugfixes (directory authorities):
6675 - Stop crashing after parsing an unknown descriptor purpose
6676 annotation. We think this bug can only be triggered by modifying a
6677 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
6679 o Minor bugfixes (pluggable transports):
6680 - When running as a bridge with pluggable transports, always publish
6681 pluggable transport information in our extrainfo descriptor, even
6682 if ExtraInfoStatistics is 0. This information is needed by
6683 BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
6686 - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
6687 Closes ticket 30630.
6690 Changes in version 0.4.1.2-alpha - 2019-06-06
6691 Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
6692 previous alpha, and some much older. It also contains minor testing
6693 improvements, and an improvement to the security of our authenticated
6694 SENDME implementation.
6696 o Major bugfixes (bridges):
6697 - Consider our directory information to have changed when our list
6698 of bridges changes. Previously, Tor would not re-compute the
6699 status of its directory information when bridges changed, and
6700 therefore would not realize that it was no longer able to build
6701 circuits. Fixes part of bug 29875.
6702 - Do not count previously configured working bridges towards our
6703 total of working bridges. Previously, when Tor's list of bridges
6704 changed, it would think that the old bridges were still usable,
6705 and delay fetching router descriptors for the new ones. Fixes part
6706 of bug 29875; bugfix on 0.3.0.1-alpha.
6708 o Major bugfixes (flow control, SENDME):
6709 - Decrement the stream-level package window after packaging a cell.
6710 Previously, it was done inside a log_debug() call, meaning that if
6711 debug logs were not enabled, the decrement would never happen, and
6712 thus the window would be out of sync with the other end point.
6713 Fixes bug 30628; bugfix on 0.4.1.1-alpha.
6715 o Major bugfixes (onion service reachability):
6716 - Properly clean up the introduction point map and associated state
6717 when circuits change purpose from onion service circuits to
6718 pathbias, measurement, or other circuit types. This may fix some
6719 instances of introduction point failure. Fixes bug 29034; bugfix
6722 o Minor features (authenticated SENDME):
6723 - Ensure that there is enough randomness on every circuit to prevent
6724 an attacker from successfully predicting the hashes they will need
6725 to include in authenticated SENDME cells. At a random interval, if
6726 we have not sent randomness already, we now leave some extra space
6727 at the end of a cell that we can fill with random bytes. Closes
6730 o Minor features (continuous integration):
6731 - When running coverage builds on Travis, we now set
6732 TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
6735 o Minor features (maintenance):
6736 - Add a new "make autostyle" target that developers can use to apply
6737 all automatic Tor style and consistency conversions to the
6738 codebase. Closes ticket 30539.
6740 o Minor features (testing):
6741 - The circuitpadding tests now use a reproducible RNG implementation,
6742 so that if a test fails, we can learn why. Part of ticket 28878.
6743 - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
6744 to set the RNG seed for tests that use a reproducible RNG. Part of
6746 - When running tests in coverage mode, take additional care to make
6747 our coverage deterministic, so that we can accurately track
6748 changes in code coverage. Closes ticket 30519.
6750 o Minor bugfixes (configuration, proxies):
6751 - Fix a bug that prevented us from supporting SOCKS5 proxies that
6752 want authentication along with configured (but unused!)
6753 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
6755 o Minor bugfixes (controller):
6756 - POSTDESCRIPTOR requests should work again. Previously, they were
6757 broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
6759 - Repair the HSFETCH command so that it works again. Previously, it
6760 expected a body when it shouldn't have. Fixes bug 30646; bugfix
6763 o Minor bugfixes (developer tooling):
6764 - Fix pre-push hook to allow fixup and squash commits when pushing
6765 to non-upstream git remote. Fixes bug 30286; bugfix
6768 o Minor bugfixes (directory authority):
6769 - Move the "bandwidth-file-headers" line in directory authority
6770 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
6773 o Minor bugfixes (NetBSD):
6774 - Fix usage of minherit() on NetBSD and other platforms that define
6775 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
6776 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
6778 o Minor bugfixes (out-of-memory handler):
6779 - When purging the DNS cache because of an out-of-memory condition,
6780 try purging just the older entries at first. Previously, we would
6781 always purge the whole thing. Fixes bug 29617; bugfix
6784 o Minor bugfixes (portability):
6785 - Avoid crashing in our tor_vasprintf() implementation on systems
6786 that define neither vasprintf() nor _vscprintf(). (This bug has
6787 been here long enough that we question whether people are running
6788 Tor on such systems, but we're applying the fix out of caution.)
6789 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
6792 o Minor bugfixes (shutdown, libevent, memory safety):
6793 - Avoid use-after-free bugs when shutting down, by making sure that
6794 we shut down libevent only after shutting down all of its users.
6795 We believe these are harmless in practice, since they only occur
6796 on the shutdown path, and do not involve any attacker-controlled
6797 data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
6799 o Minor bugfixes (static analysis):
6800 - Fix several spurious Coverity warnings about the unit tests, to
6801 lower our chances of missing real warnings in the future. Fixes
6802 bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
6805 - Specify torrc paths (with empty files) when launching tor in
6806 integration tests; refrain from reading user and system torrcs.
6807 Resolves issue 29702.
6810 Changes in version 0.4.1.1-alpha - 2019-05-22
6811 This is the first alpha in the 0.4.1.x series. It introduces
6812 lightweight circuit padding to make some onion-service circuits harder
6813 to distinguish, includes a new "authenticated SENDME" feature to make
6814 certain denial-of-service attacks more difficult, and improves
6815 performance in several areas.
6817 o Major features (circuit padding):
6818 - Onion service clients now add padding cells at the start of their
6819 INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
6820 look more like general purpose Exit traffic. The overhead for this
6821 is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
6822 extra upstream cell and 10 downstream cells for INTRODUCE
6823 circuits. This feature is only enabled when also supported by the
6824 circuit's middle node. (Clients may specify fixed middle nodes
6825 with the MiddleNodes option, and may force-disable this feature
6826 with the CircuitPadding option.) Closes ticket 28634.
6828 o Major features (code organization):
6829 - Tor now includes a generic publish-subscribe message-passing
6830 subsystem that we can use to organize intermodule dependencies. We
6831 hope to use this to reduce dependencies between modules that don't
6832 need to be related, and to generally simplify our codebase. Closes
6835 o Major features (controller protocol):
6836 - Controller commands are now parsed using a generalized parsing
6837 subsystem. Previously, each controller command was responsible for
6838 parsing its own input, which led to strange inconsistencies.
6839 Closes ticket 30091.
6841 o Major features (flow control):
6842 - Implement authenticated SENDMEs as detailed in proposal 289. A
6843 SENDME cell now includes the digest of the traffic that it
6844 acknowledges, so that once an end point receives the SENDME, it
6845 can confirm the other side's knowledge of the previous cells that
6846 were sent, and prevent certain types of denial-of-service attacks.
6847 This behavior is controlled by two new consensus parameters: see
6848 the proposal for more details. Fixes ticket 26288.
6850 o Major features (performance):
6851 - Our node selection algorithm now excludes nodes in linear time.
6852 Previously, the algorithm was quadratic, which could slow down
6853 heavily used onion services. Closes ticket 30307.
6855 o Major features (performance, RNG):
6856 - Tor now constructs a fast secure pseudorandom number generator for
6857 each thread, to use when performance is critical. This PRNG is
6858 based on AES-CTR, using a buffering construction similar to
6859 libottery and the (newer) OpenBSD arc4random() code. It
6860 outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
6861 small outputs. Although we believe it to be cryptographically
6862 strong, we are only using it when necessary for performance.
6863 Implements tickets 29023 and 29536.
6865 o Major bugfixes (onion service v3):
6866 - Fix an unreachable bug in which an introduction point could try to
6867 send an INTRODUCE_ACK with a status code that Trunnel would refuse
6868 to encode, leading the relay to assert(). We've consolidated the
6869 ABI values into Trunnel now. Fixes bug 30454; bugfix
6871 - Clients can now handle unknown status codes from INTRODUCE_ACK
6872 cells. (The NACK behavior will stay the same.) This will allow us
6873 to extend status codes in the future without breaking the normal
6874 client behavior. Fixes another part of bug 30454; bugfix
6877 o Minor features (circuit padding):
6878 - We now use a fast PRNG when scheduling circuit padding. Part of
6880 - Allow the padding machine designer to pick the edges of their
6881 histogram instead of trying to compute them automatically using an
6882 exponential formula. Resolves some undefined behavior in the case
6883 of small histograms and allows greater flexibility on machine
6884 design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
6885 - Allow circuit padding machines to hold a circuit open until they
6886 are done padding it. Closes ticket 28780.
6888 o Minor features (compile-time modules):
6889 - Add a "--list-modules" command to print a list of which compile-
6890 time modules are enabled. Closes ticket 30452.
6892 o Minor features (continuous integration):
6893 - Remove sudo configuration lines from .travis.yml as they are no
6894 longer needed with current Travis build environment. Resolves
6896 - In Travis, show stem's tor log after failure. Closes ticket 30234.
6898 o Minor features (controller):
6899 - Add onion service version 3 support to the HSFETCH command.
6900 Previously, only version 2 onion services were supported. Closes
6901 ticket 25417. Patch by Neel Chauhan.
6903 o Minor features (debugging):
6904 - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
6905 logging of additional information during assert failure. Now we
6906 can use format strings to include information for trouble
6907 shooting. Resolves ticket 29662.
6909 o Minor features (defense in depth):
6910 - In smartlist_remove_keeporder(), set unused pointers to NULL, in
6911 case a bug causes them to be used later. Closes ticket 30176.
6912 Patch from Tobias Stoeckmann.
6913 - Tor now uses a cryptographically strong PRNG even for decisions
6914 that we do not believe are security-sensitive. Previously, for
6915 performance reasons, we had used a trivially predictable linear
6916 congruential generator algorithm for certain load-balancing and
6917 statistical sampling decisions. Now we use our fast RNG in those
6918 cases. Closes ticket 29542.
6920 o Minor features (developer tools):
6921 - Tor's "practracker" test script now checks for files and functions
6922 that seem too long and complicated. Existing overlong functions
6923 and files are accepted for now, but should eventually be
6924 refactored. Closes ticket 29221.
6925 - Add some scripts used for git maintenance to scripts/git. Closes
6927 - Call practracker from pre-push and pre-commit git hooks to let
6928 developers know if they made any code style violations. Closes
6930 - Add a script to check that each header has a well-formed and
6931 unique guard macro. Closes ticket 29756.
6933 o Minor features (geoip):
6934 - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
6935 Country database. Closes ticket 30522.
6937 o Minor features (HTTP tunnel):
6938 - Return an informative web page when the HTTPTunnelPort is used as
6939 an HTTP proxy. Closes ticket 27821, patch by "eighthave".
6941 o Minor features (IPv6, v3 onion services):
6942 - Make v3 onion services put IPv6 addresses in service descriptors.
6943 Before this change, service descriptors only contained IPv4
6944 addresses. Implements 26992.
6946 o Minor features (modularity):
6947 - The "--disable-module-dirauth" compile-time option now disables
6948 even more dirauth-only code. Closes ticket 30345.
6950 o Minor features (performance):
6951 - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
6952 1.1.1 and later), since they tend to be faster than tiny-keccak.
6953 Closes ticket 28837.
6955 o Minor features (testing):
6956 - Tor's unit test code now contains helper functions to replace the
6957 PRNG with a deterministic or reproducible version for testing.
6958 Previously, various tests implemented this in various ways.
6959 Implements ticket 29732.
6960 - We now have a script, cov-test-determinism.sh, to identify places
6961 where our unit test coverage has become nondeterministic. Closes
6963 - Check that representative subsets of values of `int` and `unsigned
6964 int` can be represented by `void *`. Resolves issue 29537.
6966 o Minor bugfixes (bridge authority):
6967 - Bridge authorities now set bridges as running or non-running when
6968 about to dump their status to a file. Previously, they set bridges
6969 as running in response to a GETINFO command, but those shouldn't
6970 modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
6971 Patch by Neel Chauhan.
6973 o Minor bugfixes (channel padding statistics):
6974 - Channel padding write totals and padding-enabled totals are now
6975 counted properly in relay extrainfo descriptors. Fixes bug 29231;
6976 bugfix on 0.3.1.1-alpha.
6978 o Minor bugfixes (circuit padding):
6979 - Add a "CircuitPadding" torrc option to disable circuit padding.
6980 Fixes bug 28693; bugfix on 0.4.0.1-alpha.
6981 - Allow circuit padding machines to specify that they do not
6982 contribute much overhead, and provide consensus flags and torrc
6983 options to force clients to only use these low overhead machines.
6984 Fixes bug 29203; bugfix on 0.4.0.1-alpha.
6985 - Provide a consensus parameter to fully disable circuit padding, to
6986 be used in emergency network overload situations. Fixes bug 30173;
6987 bugfix on 0.4.0.1-alpha.
6988 - The circuit padding subsystem will no longer schedule padding if
6989 dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
6990 - Inspect a circuit-level cell queue before sending padding, to
6991 avoid sending padding while too much data is already queued. Fixes
6992 bug 29204; bugfix on 0.4.0.1-alpha.
6993 - Avoid calling monotime_absolute_usec() in circuit padding machines
6994 that do not use token removal or circuit RTT estimation. Fixes bug
6995 29085; bugfix on 0.4.0.1-alpha.
6997 o Minor bugfixes (compilation, unusual configurations):
6998 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
6999 due to missing declarations of abort(), and prevent other such
7000 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
7002 o Minor bugfixes (controller protocol):
7003 - Teach the controller parser to distinguish an object preceded by
7004 an argument list from one without. Previously, it couldn't
7005 distinguish an argument list from the first line of a multiline
7006 object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
7008 o Minor bugfixes (directory authority, ipv6):
7009 - Directory authorities with IPv6 support now always mark themselves
7010 as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
7011 Patch by Neel Chauhan.
7013 o Minor bugfixes (documentation):
7014 - Improve the documentation for using MapAddress with ".exit". Fixes
7015 bug 30109; bugfix on 0.1.0.1-rc.
7016 - Improve the monotonic time module and function documentation to
7017 explain what "monotonic" actually means, and document some results
7018 that have surprised people. Fixes bug 29640; bugfix
7020 - Use proper formatting when providing an example on quoting options
7021 that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
7023 o Minor bugfixes (logging):
7024 - Do not log a warning when running with an OpenSSL version other
7025 than the one Tor was compiled with, if the two versions should be
7026 compatible. Previously, we would warn whenever the version was
7027 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
7028 - Warn operators when the MyFamily option is set but ContactInfo is
7029 missing, as the latter should be set too. Fixes bug 25110; bugfix
7032 o Minor bugfixes (memory leak):
7033 - Avoid a minor memory leak that could occur on relays when failing
7034 to create a "keys" directory. Fixes bug 30148; bugfix
7037 o Minor bugfixes (onion services):
7038 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
7039 implemenation) when failing to load an onion service client
7040 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
7041 - When refusing to launch a controller's HSFETCH request because of
7042 rate-limiting, respond to the controller with a new response,
7043 "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
7044 this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
7046 - When relaunching a circuit to a rendezvous service, mark the
7047 circuit as needing high-uptime routers as appropriate. Fixes bug
7048 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
7049 - Stop ignoring IPv6 link specifiers sent to v3 onion services.
7050 (IPv6 support for v3 onion services is still incomplete: see
7051 ticket 23493 for details.) Fixes bug 23588; bugfix on
7052 0.3.2.1-alpha. Patch by Neel Chauhan.
7054 o Minor bugfixes (onion services, performance):
7055 - When building circuits to onion services, call tor_addr_parse()
7056 less often. Previously, we called tor_addr_parse() in
7057 circuit_is_acceptable() even if its output wasn't used. This
7058 change should improve performance when building circuits. Fixes
7059 bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
7061 o Minor bugfixes (performance):
7062 - When checking whether a node is a bridge, use a fast check to make
7063 sure that its identity is set. Previously, we used a constant-time
7064 check, which is not necessary in this case. Fixes bug 30308;
7065 bugfix on 0.3.5.1-alpha.
7067 o Minor bugfixes (pluggable transports):
7068 - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
7069 well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
7071 o Minor bugfixes (probability distributions):
7072 - Refactor and improve parts of the probability distribution code
7073 that made Coverity complain. Fixes bug 29805; bugfix
7076 o Minor bugfixes (python):
7077 - Stop assuming that /usr/bin/python3 exists. For scripts that work
7078 with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
7079 python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
7081 o Minor bugfixes (relay):
7082 - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
7083 is auto, act as if ExitRelay is 1. Previously, we would ignore
7084 IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
7085 0.3.5.1-alpha. Patch by Neel Chauhan.
7087 o Minor bugfixes (stats):
7088 - When ExtraInfoStatistics is 0, stop including bandwidth usage
7089 statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
7090 bridge statistics by country in extra-info documents. Fixes bug
7091 29018; bugfix on 0.2.4.1-alpha.
7093 o Minor bugfixes (testing):
7094 - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
7095 we used `ulimit -c` in test_bt.sh, which violates POSIX shell
7096 compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
7097 - Fix some incorrect code in the v3 onion service unit tests. Fixes
7098 bug 29243; bugfix on 0.3.2.1-alpha.
7099 - In the "routerkeys/*" tests, check the return values of mkdir()
7100 for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
7101 Found by Coverity as CID 1444254.
7102 - Split test_utils_general() into several smaller test functions.
7103 This makes it easier to perform resource deallocation on assert
7104 failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
7105 Fixes bug 29823; bugfix on 0.2.9.1-alpha.
7107 o Minor bugfixes (tor-resolve):
7108 - Fix a memory leak in tor-resolve that could happen if Tor gave it
7109 a malformed SOCKS response. (Memory leaks in tor-resolve don't
7110 actually matter, but it's good to fix them anyway.) Fixes bug
7111 30151; bugfix on 0.4.0.1-alpha.
7113 o Code simplification and refactoring:
7114 - Abstract out the low-level formatting of replies on the control
7115 port. Implements ticket 30007.
7116 - Add several assertions in an attempt to fix some Coverity
7117 warnings. Closes ticket 30149.
7118 - Introduce a connection_dir_buf_add() helper function that checks
7119 for compress_state of dir_connection_t and automatically writes a
7120 string to directory connection with or without compression.
7121 Resolves issue 28816.
7122 - Make the base32_decode() API return the number of bytes written,
7123 for consistency with base64_decode(). Closes ticket 28913.
7124 - Move most relay-only periodic events out of mainloop.c into the
7125 relay subsystem. Closes ticket 30414.
7126 - Refactor and encapsulate parts of the codebase that manipulate
7127 crypt_path_t objects. Resolves issue 30236.
7128 - Refactor several places in our code that Coverity incorrectly
7129 believed might have memory leaks. Closes ticket 30147.
7130 - Remove redundant return values in crypto_format, and the
7131 associated return value checks elsewhere in the code. Make the
7132 implementations in crypto_format consistent, and remove redundant
7133 code. Resolves ticket 29660.
7134 - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
7135 it is not a constant-time function. Closes ticket 30309.
7136 - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
7137 all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
7138 bugfix on 0.3.2.1-alpha.
7139 - Simplify v3 onion service link specifier handling code. Fixes bug
7140 23576; bugfix on 0.3.2.1-alpha.
7141 - Split crypto_digest.c into NSS code, OpenSSL code, and shared
7142 code. Resolves ticket 29108.
7143 - Split control.c into several submodules, in preparation for
7144 distributing its current responsibilities throughout the codebase.
7145 Closes ticket 29894.
7146 - Start to move responsibility for knowing about periodic events to
7147 the appropriate subsystems, so that the mainloop doesn't need to
7148 know all the periodic events in the rest of the codebase.
7149 Implements tickets 30293 and 30294.
7152 - Document how to find git commits and tags for bug fixes in
7153 CodingStandards.md. Update some file documentation. Closes
7157 - Remove the linux-tor-prio.sh script from contrib/operator-tools
7158 directory. Resolves issue 29434.
7159 - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
7160 - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
7163 o Code simplification and refactoring (shell scripts):
7164 - Clean up many of our shell scripts to fix shellcheck warnings.
7165 These include autogen.sh (ticket 26069), test_keygen.sh (ticket
7166 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
7167 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
7168 (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
7169 fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
7170 nagios-check-tor-authority-cert (ticket 29071),
7171 src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
7172 (ticket 29060), test_key_expiration.sh (ticket 30002),
7173 zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
7176 o Testing (chutney):
7177 - In "make test-network-all", test IPv6-only v3 single onion
7178 services, using the chutney network single-onion-v23-ipv6-md.
7179 Closes ticket 27251.
7182 Changes in version 0.4.0.5 - 2019-05-02
7183 This is the first stable release in the 0.4.0.x series. It contains
7184 improvements for power management and bootstrap reporting, as well as
7185 preliminary backend support for circuit padding to prevent some kinds
7186 of traffic analysis. It also continues our work in refactoring Tor for
7187 long-term maintainability.
7189 Per our support policy, we will support the 0.4.0.x series for nine
7190 months, or until three months after the release of a stable 0.4.1.x:
7191 whichever is longer. If you need longer-term support, please stick
7192 with 0.3.5.x, which will we plan to support until Feb 2022.
7194 Below are the changes since 0.4.0.4-rc. For a complete list of changes
7195 since 0.3.5.7, see the ReleaseNotes file.
7197 o Minor features (continuous integration):
7198 - In Travis, tell timelimit to use stem's backtrace signals, and
7199 launch python directly from timelimit, so python receives the
7200 signals from timelimit, rather than make. Closes ticket 30117.
7202 o Minor features (diagnostic):
7203 - Add more diagnostic log messages in an attempt to solve the issue
7204 of NUL bytes appearing in a microdescriptor cache. Related to
7207 o Minor features (testing):
7208 - Use the approx_time() function when setting the "Expires" header
7209 in directory replies, to make them more testable. Needed for
7212 o Minor bugfixes (rust):
7213 - Abort on panic in all build profiles, instead of potentially
7214 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
7216 o Minor bugfixes (shellcheck):
7217 - Look for scripts in their correct locations during "make
7218 shellcheck". Previously we had looked in the wrong place during
7219 out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
7221 o Minor bugfixes (testing):
7222 - Check the time in the "Expires" header using approx_time(). Fixes
7223 bug 30001; bugfix on 0.4.0.4-rc.
7225 o Minor bugfixes (UI):
7226 - Lower log level of unlink() errors during bootstrap. Fixes bug
7227 29930; bugfix on 0.4.0.1-alpha.
7230 Changes in version 0.4.0.4-rc - 2019-04-11
7231 Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
7232 several bugs from earlier versions, including some that had affected
7233 stability, and one that prevented relays from working with NSS.
7235 o Major bugfixes (NSS, relay):
7236 - When running with NSS, disable TLS 1.2 ciphersuites that use
7237 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
7238 these ciphersuites don't work -- which caused relays to fail to
7239 handshake with one another when these ciphersuites were enabled.
7240 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
7242 o Minor features (bandwidth authority):
7243 - Make bandwidth authorities ignore relays that are reported in the
7244 bandwidth file with the flag "vote=0". This change allows us to
7245 report unmeasured relays for diagnostic reasons without including
7246 their bandwidth in the bandwidth authorities' vote. Closes
7248 - When a directory authority is using a bandwidth file to obtain the
7249 bandwidth values that will be included in the next vote, serve
7250 this bandwidth file at /tor/status-vote/next/bandwidth. Closes
7253 o Minor features (circuit padding):
7254 - Stop warning about undefined behavior in the probability
7255 distribution tests. Float division by zero may technically be
7256 undefined behavior in C, but it's well defined in IEEE 754.
7257 Partial backport of 29298. Closes ticket 29527; bugfix
7260 o Minor features (continuous integration):
7261 - On Travis Rust builds, cleanup Rust registry and refrain from
7262 caching the "target/" directory to speed up builds. Resolves
7265 o Minor features (dormant mode):
7266 - Add a DormantCanceledByStartup option to tell Tor that it should
7267 treat a startup event as cancelling any previous dormant state.
7268 Integrators should use this option with caution: it should only be
7269 used if Tor is being started because of something that the user
7270 did, and not if Tor is being automatically started in the
7271 background. Closes ticket 29357.
7273 o Minor features (geoip):
7274 - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
7275 Country database. Closes ticket 29992.
7277 o Minor features (NSS, diagnostic):
7278 - Try to log an error from NSS (if there is any) and a more useful
7279 description of our situation if we are using NSS and a call to
7280 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
7282 o Minor bugfixes (security):
7283 - Fix a potential double free bug when reading huge bandwidth files.
7284 The issue is not exploitable in the current Tor network because
7285 the vulnerable code is only reached when directory authorities
7286 read bandwidth files, but bandwidth files come from a trusted
7287 source (usually the authorities themselves). Furthermore, the
7288 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
7289 which are not used by any of the current authorities. Fixes bug
7290 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
7292 - Verify in more places that we are not about to create a buffer
7293 with more than INT_MAX bytes, to avoid possible OOB access in the
7294 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
7295 fixed by Tobias Stoeckmann.
7297 o Minor bugfix (continuous integration):
7298 - Reset coverage state on disk after Travis CI has finished. This
7299 should prevent future coverage merge errors from causing the test
7300 suite for the "process" subsystem to fail. The process subsystem
7301 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
7303 - Terminate test-stem if it takes more than 9.5 minutes to run.
7304 (Travis terminates the job after 10 minutes of no output.)
7305 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
7307 o Minor bugfixes (bootstrap reporting):
7308 - During bootstrap reporting, correctly distinguish pluggable
7309 transports from plain proxies. Fixes bug 28925; bugfix
7312 o Minor bugfixes (C correctness):
7313 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
7314 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
7317 o Minor bugfixes (circuitpadding testing):
7318 - Minor tweaks to avoid rare test failures related to timers and
7319 monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
7321 o Minor bugfixes (directory authorities):
7322 - Actually include the bandwidth-file-digest line in directory
7323 authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
7325 o Minor bugfixes (logging):
7326 - On Windows, when errors cause us to reload a consensus from disk,
7327 tell the user that we are retrying at log level "notice".
7328 Previously we only logged this information at "info", which was
7329 confusing because the errors themselves were logged at "warning".
7330 Improves previous fix for 28614. Fixes bug 30004; bugfix
7333 o Minor bugfixes (pluggable transports):
7334 - Restore old behavior when it comes to discovering the path of a
7335 given Pluggable Transport executable file. A change in
7336 0.4.0.1-alpha had broken this behavior on paths containing a
7337 space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
7339 o Minor bugfixes (testing):
7340 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
7341 recent test-network.sh to use new chutney features in CI. Fixes
7342 bug 29703; bugfix on 0.2.9.1-alpha.
7343 - Fix a test failure on Windows caused by an unexpected "BUG"
7344 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
7347 o Minor bugfixes (TLS protocol):
7348 - When classifying a client's selection of TLS ciphers, if the
7349 client ciphers are not yet available, do not cache the result.
7350 Previously, we had cached the unavailability of the cipher list
7351 and never looked again, which in turn led us to assume that the
7352 client only supported the ancient V1 link protocol. This, in turn,
7353 was causing Stem integration tests to stall in some cases. Fixes
7354 bug 30021; bugfix on 0.2.4.8-alpha.
7356 o Code simplification and refactoring:
7357 - Introduce a connection_dir_buf_add() helper function that detects
7358 whether compression is in use, and adds a string accordingly.
7359 Resolves issue 28816.
7360 - Refactor handle_get_next_bandwidth() to use
7361 connection_dir_buf_add(). Implements ticket 29897.
7364 - Clarify that Tor performs stream isolation among *Port listeners
7365 by default. Resolves issue 29121.
7368 Changes in version 0.4.0.3-alpha - 2019-03-22
7369 Tor 0.4.0.3-alpha is the third in its series; it fixes several small
7370 bugs from earlier versions.
7372 o Minor features (address selection):
7373 - Treat the subnet 100.64.0.0/10 as public for some purposes;
7374 private for others. This subnet is the RFC 6598 (Carrier Grade
7375 NAT) IP range, and is deployed by many ISPs as an alternative to
7376 RFC 1918 that does not break existing internal networks. Tor now
7377 blocks SOCKS and control ports on these addresses and warns users
7378 if client ports or ExtORPorts are listening on a RFC 6598 address.
7379 Closes ticket 28525. Patch by Neel Chauhan.
7381 o Minor features (geoip):
7382 - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
7383 Country database. Closes ticket 29666.
7385 o Minor bugfixes (circuitpadding):
7386 - Inspect the circuit-level cell queue before sending padding, to
7387 avoid sending padding when too much data is queued. Fixes bug
7388 29204; bugfix on 0.4.0.1-alpha.
7390 o Minor bugfixes (logging):
7391 - Correct a misleading error message when IPv4Only or IPv6Only is
7392 used but the resolved address can not be interpreted as an address
7393 of the specified IP version. Fixes bug 13221; bugfix on
7394 0.2.3.9-alpha. Patch from Kris Katterjohn.
7395 - Log the correct port number for listening sockets when "auto" is
7396 used to let Tor pick the port number. Previously, port 0 was
7397 logged instead of the actual port number. Fixes bug 29144; bugfix
7398 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7399 - Stop logging a BUG() warning when Tor is waiting for exit
7400 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
7402 o Minor bugfixes (memory management):
7403 - Refactor the shared random state's memory management so that it
7404 actually takes ownership of the shared random value pointers.
7405 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
7407 o Minor bugfixes (memory management, testing):
7408 - Stop leaking parts of the shared random state in the shared-random
7409 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
7411 o Minor bugfixes (pluggable transports):
7412 - Fix an assertion failure crash bug when a pluggable transport is
7413 terminated during the bootstrap phase. Fixes bug 29562; bugfix
7416 o Minor bugfixes (Rust, protover):
7417 - Add a missing "Padding" value to the Rust implementation of
7418 protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
7420 o Minor bugfixes (single onion services):
7421 - Allow connections to single onion services to remain idle without
7422 being disconnected. Previously, relays acting as rendezvous points
7423 for single onion services were mistakenly closing idle rendezvous
7424 circuits after 60 seconds, thinking that they were unused
7425 directory-fetching circuits that had served their purpose. Fixes
7426 bug 29665; bugfix on 0.2.1.26.
7428 o Minor bugfixes (stats):
7429 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
7430 relay and bridge extra-info documents. Fixes bug 29017; bugfix
7433 o Minor bugfixes (testing):
7434 - Downgrade some LOG_ERR messages in the address/* tests to
7435 warnings. The LOG_ERR messages were occurring when we had no
7436 configured network. We were failing the unit tests, because we
7437 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
7438 29530; bugfix on 0.3.5.8.
7439 - Fix our gcov wrapper script to look for object files at the
7440 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
7441 - Decrease the false positive rate of stochastic probability
7442 distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
7444 o Minor bugfixes (Windows, CI):
7445 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
7446 Windows Server 2012 R2 job. The remaining 2 jobs still provide
7447 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
7448 fast_finish, so failed jobs terminate the build immediately. Fixes
7449 bug 29601; bugfix on 0.3.5.4-alpha.
7452 Changes in version 0.3.5.8 - 2019-02-21
7453 Tor 0.3.5.8 backports several fixes from later releases, including fixes
7454 for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
7457 It also includes a fix for a medium-severity security bug affecting Tor
7458 0.3.2.1-alpha and later. All Tor instances running an affected release
7459 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7461 o Major bugfixes (cell scheduler, KIST, security):
7462 - Make KIST consider the outbuf length when computing what it can
7463 put in the outbuf. Previously, KIST acted as though the outbuf
7464 were empty, which could lead to the outbuf becoming too full. It
7465 is possible that an attacker could exploit this bug to cause a Tor
7466 client or relay to run out of memory and crash. Fixes bug 29168;
7467 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7468 TROVE-2019-001 and CVE-2019-8955.
7470 o Major bugfixes (networking, backport from 0.4.0.2-alpha):
7471 - Gracefully handle empty username/password fields in SOCKS5
7472 username/password auth message and allow SOCKS5 handshake to
7473 continue. Previously, we had rejected these handshakes, breaking
7474 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
7476 o Minor features (compilation, backport from 0.4.0.2-alpha):
7477 - Compile correctly when OpenSSL is built with engine support
7478 disabled, or with deprecated APIs disabled. Closes ticket 29026.
7479 Patches from "Mangix".
7481 o Minor features (geoip):
7482 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7483 Country database. Closes ticket 29478.
7485 o Minor features (testing, backport from 0.4.0.2-alpha):
7486 - Treat all unexpected ERR and BUG messages as test failures. Closes
7489 o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
7490 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
7491 connection waiting for a descriptor that we actually have in the
7492 cache. It turns out that this can actually happen, though it is
7493 rare. Now, tor will recover and retry the descriptor. Fixes bug
7494 28669; bugfix on 0.3.2.4-alpha.
7496 o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
7497 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
7498 IPv6 socket was bound using an address family of AF_INET instead
7499 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
7502 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7503 - Update Cargo.lock file to match the version made by the latest
7504 version of Rust, so that "make distcheck" will pass again. Fixes
7505 bug 29244; bugfix on 0.3.3.4-alpha.
7507 o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
7508 - Select guards even if the consensus has expired, as long as the
7509 consensus is still reasonably live. Fixes bug 24661; bugfix
7512 o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
7513 - Compile correctly on OpenBSD; previously, we were missing some
7514 headers required in order to detect it properly. Fixes bug 28938;
7515 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7517 o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
7518 - Describe the contents of the v3 onion service client authorization
7519 files correctly: They hold public keys, not private keys. Fixes
7520 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
7522 o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
7523 - Rework rep_hist_log_link_protocol_counts() to iterate through all
7524 link protocol versions when logging incoming/outgoing connection
7525 counts. Tor no longer skips version 5, and we won't have to
7526 remember to update this function when new link protocol version is
7527 developed. Fixes bug 28920; bugfix on 0.2.6.10.
7529 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
7530 - Log more information at "warning" level when unable to read a
7531 private key; log more information at "info" level when unable to
7532 read a public key. We had warnings here before, but they were lost
7533 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
7535 o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
7536 - The amount of total available physical memory is now determined
7537 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
7538 when it is defined and a 64-bit variant is not available. Fixes
7539 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
7541 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7542 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
7543 than one private key for a hidden service. Fixes bug 29040; bugfix
7545 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
7546 "debug" level. Tor used to log it as a warning, which caused very
7547 long log lines to appear for some users. Fixes bug 29135; bugfix
7549 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7550 as a warning. Instead, log it as a protocol warning, because there
7551 is nothing that relay operators can do to fix it. Fixes bug 29029;
7552 bugfix on 0.2.5.7-rc.
7554 o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
7555 - Mark outdated dirservers when Tor only has a reasonably live
7556 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
7558 o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
7559 - Detect and suppress "bug" warnings from the util/time test on
7560 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
7561 - Do not log an error-level message if we fail to find an IPv6
7562 network interface from the unit tests. Fixes bug 29160; bugfix
7565 o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
7566 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
7567 Some users took this phrasing to mean that the mentioned guard was
7568 under their control or responsibility, which it is not. Fixes bug
7569 28895; bugfix on Tor 0.3.0.1-alpha.
7572 Changes in version 0.3.4.11 - 2019-02-21
7573 Tor 0.3.4.11 is the third stable release in its series. It includes
7574 a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
7575 later. All Tor instances running an affected release should upgrade to
7576 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7578 o Major bugfixes (cell scheduler, KIST, security):
7579 - Make KIST consider the outbuf length when computing what it can
7580 put in the outbuf. Previously, KIST acted as though the outbuf
7581 were empty, which could lead to the outbuf becoming too full. It
7582 is possible that an attacker could exploit this bug to cause a Tor
7583 client or relay to run out of memory and crash. Fixes bug 29168;
7584 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7585 TROVE-2019-001 and CVE-2019-8955.
7587 o Minor features (geoip):
7588 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7589 Country database. Closes ticket 29478.
7591 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7592 - Update Cargo.lock file to match the version made by the latest
7593 version of Rust, so that "make distcheck" will pass again. Fixes
7594 bug 29244; bugfix on 0.3.3.4-alpha.
7596 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7597 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7598 as a warning. Instead, log it as a protocol warning, because there
7599 is nothing that relay operators can do to fix it. Fixes bug 29029;
7600 bugfix on 0.2.5.7-rc.
7603 Changes in version 0.3.3.12 - 2019-02-21
7604 Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
7605 0.3.2.1-alpha and later. All Tor instances running an affected release
7606 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7608 This release marks the end of support for the Tor 0.3.3.x series. We
7609 recommend that users switch to either the Tor 0.3.4 series (supported
7610 until at least 10 June 2019), or the Tor 0.3.5 series, which will
7611 receive long-term support until at least 1 Feb 2022.
7613 o Major bugfixes (cell scheduler, KIST, security):
7614 - Make KIST consider the outbuf length when computing what it can
7615 put in the outbuf. Previously, KIST acted as though the outbuf
7616 were empty, which could lead to the outbuf becoming too full. It
7617 is possible that an attacker could exploit this bug to cause a Tor
7618 client or relay to run out of memory and crash. Fixes bug 29168;
7619 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7620 TROVE-2019-001 and CVE-2019-8955.
7622 o Minor features (geoip):
7623 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7624 Country database. Closes ticket 29478.
7626 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7627 - Update Cargo.lock file to match the version made by the latest
7628 version of Rust, so that "make distcheck" will pass again. Fixes
7629 bug 29244; bugfix on 0.3.3.4-alpha.
7631 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7632 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7633 as a warning. Instead, log it as a protocol warning, because there
7634 is nothing that relay operators can do to fix it. Fixes bug 29029;
7635 bugfix on 0.2.5.7-rc.
7638 Changes in version 0.4.0.2-alpha - 2019-02-21
7639 Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
7640 bugs from earlier versions, including several that had broken
7641 backward compatibility.
7643 It also includes a fix for a medium-severity security bug affecting Tor
7644 0.3.2.1-alpha and later. All Tor instances running an affected release
7645 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7647 o Major bugfixes (cell scheduler, KIST, security):
7648 - Make KIST consider the outbuf length when computing what it can
7649 put in the outbuf. Previously, KIST acted as though the outbuf
7650 were empty, which could lead to the outbuf becoming too full. It
7651 is possible that an attacker could exploit this bug to cause a Tor
7652 client or relay to run out of memory and crash. Fixes bug 29168;
7653 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7654 TROVE-2019-001 and CVE-2019-8955.
7656 o Major bugfixes (networking):
7657 - Gracefully handle empty username/password fields in SOCKS5
7658 username/password auth messsage and allow SOCKS5 handshake to
7659 continue. Previously, we had rejected these handshakes, breaking
7660 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
7662 o Major bugfixes (windows, startup):
7663 - When reading a consensus file from disk, detect whether it was
7664 written in text mode, and re-read it in text mode if so. Always
7665 write consensus files in binary mode so that we can map them into
7666 memory later. Previously, we had written in text mode, which
7667 confused us when we tried to map the file on windows. Fixes bug
7668 28614; bugfix on 0.4.0.1-alpha.
7670 o Minor features (compilation):
7671 - Compile correctly when OpenSSL is built with engine support
7672 disabled, or with deprecated APIs disabled. Closes ticket 29026.
7673 Patches from "Mangix".
7675 o Minor features (developer tooling):
7676 - Check that bugfix versions in changes files look like Tor versions
7677 from the versions spec. Warn when bugfixes claim to be on a future
7678 release. Closes ticket 27761.
7679 - Provide a git pre-commit hook that disallows committing if we have
7680 any failures in our code and changelog formatting checks. It is
7681 now available in scripts/maint/pre-commit.git-hook. Implements
7684 o Minor features (directory authority):
7685 - When a directory authority is using a bandwidth file to obtain
7686 bandwidth values, include the digest of that file in the vote.
7687 Closes ticket 26698.
7689 o Minor features (geoip):
7690 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7691 Country database. Closes ticket 29478.
7693 o Minor features (testing):
7694 - Treat all unexpected ERR and BUG messages as test failures. Closes
7697 o Minor bugfixes (build, compatibility, rust):
7698 - Update Cargo.lock file to match the version made by the latest
7699 version of Rust, so that "make distcheck" will pass again. Fixes
7700 bug 29244; bugfix on 0.3.3.4-alpha.
7702 o Minor bugfixes (compilation):
7703 - Fix compilation warnings in test_circuitpadding.c. Fixes bug
7704 29169; bugfix on 0.4.0.1-alpha.
7705 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
7706 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
7708 o Minor bugfixes (documentation):
7709 - Describe the contents of the v3 onion service client authorization
7710 files correctly: They hold public keys, not private keys. Fixes
7711 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
7713 o Minor bugfixes (linux seccomp sandbox):
7714 - Fix startup crash when experimental sandbox support is enabled.
7715 Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
7717 o Minor bugfixes (logging):
7718 - Avoid logging that we are relaxing a circuit timeout when that
7719 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
7720 - Log more information at "warning" level when unable to read a
7721 private key; log more information at "info" level when unable to
7722 read a public key. We had warnings here before, but they were lost
7723 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
7725 o Minor bugfixes (misc):
7726 - The amount of total available physical memory is now determined
7727 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
7728 when it is defined and a 64-bit variant is not available. Fixes
7729 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
7731 o Minor bugfixes (onion services):
7732 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
7733 than one private key for a hidden service. Fixes bug 29040; bugfix
7735 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
7736 "debug" level. Tor used to log it as a warning, which caused very
7737 long log lines to appear for some users. Fixes bug 29135; bugfix
7739 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7740 as a warning. Instead, log it as a protocol warning, because there
7741 is nothing that relay operators can do to fix it. Fixes bug 29029;
7742 bugfix on 0.2.5.7-rc.
7744 o Minor bugfixes (scheduler):
7745 - When re-adding channels to the pending list, check the correct
7746 channel's sched_heap_idx. This issue has had no effect in mainline
7747 Tor, but could have led to bugs down the road in improved versions
7748 of our circuit scheduling code. Fixes bug 29508; bugfix
7751 o Minor bugfixes (tests):
7752 - Fix intermittent failures on an adaptive padding test. Fixes one
7753 case of bug 29122; bugfix on 0.4.0.1-alpha.
7754 - Disable an unstable circuit-padding test that was failing
7755 intermittently because of an ill-defined small histogram. Such
7756 histograms will be allowed again after 29298 is implemented. Fixes
7757 a second case of bug 29122; bugfix on 0.4.0.1-alpha.
7758 - Detect and suppress "bug" warnings from the util/time test on
7759 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
7760 - Do not log an error-level message if we fail to find an IPv6
7761 network interface from the unit tests. Fixes bug 29160; bugfix
7765 - In the manpage entry describing MapAddress torrc setting, use
7766 example IP addresses from ranges specified for use in documentation
7767 by RFC 5737. Resolves issue 28623.
7770 - Remove the old check-tor script. Resolves issue 29072.
7773 Changes in version 0.4.0.1-alpha - 2019-01-18
7774 Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
7775 introduces improved features for power and bandwidth conservation,
7776 more accurate reporting of bootstrap progress for user interfaces, and
7777 an experimental backend for an exciting new adaptive padding feature.
7778 There is also the usual assortment of bugfixes and minor features, all
7781 o Major features (battery management, client, dormant mode):
7782 - When Tor is running as a client, and it is unused for a long time,
7783 it can now enter a "dormant" state. When Tor is dormant, it avoids
7784 network and CPU activity until it is reawoken either by a user
7785 request or by a controller command. For more information, see the
7786 configuration options starting with "Dormant". Implements tickets
7788 - The client's memory of whether it is "dormant", and how long it
7789 has spent idle, persists across invocations. Implements
7791 - There is a DormantOnFirstStartup option that integrators can use
7792 if they expect that in many cases, Tor will be installed but
7795 o Major features (bootstrap reporting):
7796 - When reporting bootstrap progress, report the first connection
7797 uniformly, regardless of whether it's a connection for building
7798 application circuits. This allows finer-grained reporting of early
7799 progress than previously possible, with the improvements of ticket
7800 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
7801 - When reporting bootstrap progress, treat connecting to a proxy or
7802 pluggable transport as separate from having successfully used that
7803 proxy or pluggable transport to connect to a relay. Closes tickets
7806 o Major features (circuit padding):
7807 - Implement preliminary support for the circuit padding portion of
7808 Proposal 254. The implementation supports Adaptive Padding (aka
7809 WTF-PAD) state machines for use between experimental clients and
7810 relays. Support is also provided for APE-style state machines that
7811 use probability distributions instead of histograms to specify
7812 inter-packet delay. At the moment, Tor does not provide any
7813 padding state machines that are used in normal operation: for now,
7814 this feature exists solely for experimentation. Closes
7817 o Major features (refactoring):
7818 - Tor now uses an explicit list of its own subsystems when
7819 initializing and shutting down. Previously, these systems were
7820 managed implicitly in various places throughout the codebase.
7821 (There may still be some subsystems using the old system.) Closes
7824 o Minor features (bootstrap reporting):
7825 - When reporting bootstrap progress, stop distinguishing between
7826 situations where only internal paths are available and situations
7827 where external paths are available. Previously, Tor would often
7828 erroneously report that it had only internal paths. Closes
7831 o Minor features (continuous integration):
7832 - Log Python version during each Travis CI job. Resolves
7835 o Minor features (controller):
7836 - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
7837 Implements ticket 28843.
7839 o Minor features (developer tooling):
7840 - Provide a git hook script to prevent "fixup!" and "squash!"
7841 commits from ending up in the master branch, as scripts/main/pre-
7842 push.git-hook. Closes ticket 27993.
7844 o Minor features (directory authority):
7845 - Directory authorities support a new consensus algorithm, under
7846 which the family lines in microdescriptors are encoded in a
7847 canonical form. This change makes family lines more compressible
7848 in transit, and on the client. Closes ticket 28266; implements
7851 o Minor features (directory authority, relay):
7852 - Authorities now vote on a "StaleDesc" flag to indicate that a
7853 relay's descriptor is so old that the relay should upload again
7854 soon. Relays treat this flag as a signal to upload a new
7855 descriptor. This flag will eventually let us remove the
7856 'published' date from routerstatus entries, and make our consensus
7857 diffs much smaller. Closes ticket 26770; implements proposal 293.
7859 o Minor features (fallback directory mirrors):
7860 - Update the fallback whitelist based on operator opt-ins and opt-
7861 outs. Closes ticket 24805, patch by Phoul.
7863 o Minor features (FreeBSD):
7864 - On FreeBSD-based systems, warn relay operators if the
7865 "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
7866 Closes ticket 28518.
7868 o Minor features (HTTP standards compliance):
7869 - Stop sending the header "Content-type: application/octet-stream"
7870 along with transparently compressed documents: this confused
7871 browsers. Closes ticket 28100.
7873 o Minor features (IPv6):
7874 - We add an option ClientAutoIPv6ORPort, to make clients randomly
7875 prefer a node's IPv4 or IPv6 ORPort. The random preference is set
7876 every time a node is loaded from a new consensus or bridge config.
7877 We expect that this option will enable clients to bootstrap more
7878 quickly without having to determine whether they support IPv4,
7879 IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
7880 - When using addrs_in_same_network_family(), avoid choosing circuit
7881 paths that pass through the same IPv6 subnet more than once.
7882 Previously, we only checked IPv4 subnets. Closes ticket 24393.
7883 Patch by Neel Chauhan.
7885 o Minor features (log messages):
7886 - Improve log message in v3 onion services that could print out
7887 negative revision counters. Closes ticket 27707. Patch
7890 o Minor features (memory usage):
7891 - Save memory by storing microdescriptor family lists with a more
7892 compact representation. Closes ticket 27359.
7893 - Tor clients now use mmap() to read consensus files from disk, so
7894 that they no longer need keep the full text of a consensus in
7895 memory when parsing it or applying a diff. Closes ticket 27244.
7897 o Minor features (parsing):
7898 - Directory authorities now validate that router descriptors and
7899 ExtraInfo documents are in a valid subset of UTF-8, and reject
7900 them if they are not. Closes ticket 27367.
7902 o Minor features (performance):
7903 - Cache the results of summarize_protocol_flags(), so that we don't
7904 have to parse the same protocol-versions string over and over.
7905 This should save us a huge number of malloc calls on startup, and
7906 may reduce memory fragmentation with some allocators. Closes
7908 - Remove a needless memset() call from get_token_arguments, thereby
7909 speeding up the tokenization of directory objects by about 20%.
7910 Closes ticket 28852.
7911 - Replace parse_short_policy() with a faster implementation, to
7912 improve microdescriptor parsing time. Closes ticket 28853.
7913 - Speed up directory parsing a little by avoiding use of the non-
7914 inlined strcmp_len() function. Closes ticket 28856.
7915 - Speed up microdescriptor parsing by about 30%, to help improve
7916 startup time. Closes ticket 28839.
7918 o Minor features (pluggable transports):
7919 - Add support for emitting STATUS updates to Tor's control port from
7920 a pluggable transport process. Closes ticket 28846.
7921 - Add support for logging to Tor's logging subsystem from a
7922 pluggable transport process. Closes ticket 28180.
7924 o Minor features (process management):
7925 - Add a new process API for handling child processes. This new API
7926 allows Tor to have bi-directional communication with child
7927 processes on both Unix and Windows. Closes ticket 28179.
7928 - Use the subsystem manager to initialize and shut down the process
7929 module. Closes ticket 28847.
7931 o Minor features (relay):
7932 - When listing relay families, list them in canonical form including
7933 the relay's own identity, and try to give a more useful set of
7934 warnings. Part of ticket 28266 and proposal 298.
7936 o Minor features (required protocols):
7937 - Before exiting because of a missing required protocol, Tor will
7938 now check the publication time of the consensus, and not exit
7939 unless the consensus is newer than the Tor program's own release
7940 date. Previously, Tor would not check the consensus publication
7941 time, and so might exit because of a missing protocol that might
7942 no longer be required in a current consensus. Implements proposal
7943 297; closes ticket 27735.
7945 o Minor features (testing):
7946 - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
7947 networks. Closes ticket 28840. Patch by Rob Jansen.
7949 o Minor bugfixes (client, clock skew):
7950 - Bootstrap successfully even when Tor's clock is behind the clocks
7951 on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
7952 - Select guards even if the consensus has expired, as long as the
7953 consensus is still reasonably live. Fixes bug 24661; bugfix
7956 o Minor bugfixes (compilation):
7957 - Compile correctly on OpenBSD; previously, we were missing some
7958 headers required in order to detect it properly. Fixes bug 28938;
7959 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7961 o Minor bugfixes (directory clients):
7962 - Mark outdated dirservers when Tor only has a reasonably live
7963 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
7965 o Minor bugfixes (directory mirrors):
7966 - Even when a directory mirror's clock is behind the clocks on the
7967 authorities, we now allow the mirror to serve "future"
7968 consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
7970 o Minor bugfixes (DNS):
7971 - Gracefully handle an empty or absent resolve.conf file by falling
7972 back to using "localhost" as a DNS server (and hoping it works).
7973 Previously, we would just stop running as an exit. Fixes bug
7974 21900; bugfix on 0.2.1.10-alpha.
7976 o Minor bugfixes (guards):
7977 - In count_acceptable_nodes(), the minimum number is now one bridge
7978 or guard node, and two non-guard nodes for a circuit. Previously,
7979 we had added up the sum of all nodes with a descriptor, but that
7980 could cause us to build failing circuits when we had either too
7981 many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
7982 0.2.3.1-alpha. Patch by Neel Chauhan.
7984 o Minor bugfixes (IPv6):
7985 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
7986 IPv6 socket was bound using an address family of AF_INET instead
7987 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
7990 o Minor bugfixes (logging):
7991 - Rework rep_hist_log_link_protocol_counts() to iterate through all
7992 link protocol versions when logging incoming/outgoing connection
7993 counts. Tor no longer skips version 5, and we won't have to
7994 remember to update this function when new link protocol version is
7995 developed. Fixes bug 28920; bugfix on 0.2.6.10.
7997 o Minor bugfixes (networking):
7998 - Introduce additional checks into tor_addr_parse() to reject
7999 certain incorrect inputs that previously were not detected. Fixes
8000 bug 23082; bugfix on 0.2.0.10-alpha.
8002 o Minor bugfixes (onion service v3, client):
8003 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
8004 connection waiting for a descriptor that we actually have in the
8005 cache. It turns out that this can actually happen, though it is
8006 rare. Now, tor will recover and retry the descriptor. Fixes bug
8007 28669; bugfix on 0.3.2.4-alpha.
8009 o Minor bugfixes (periodic events):
8010 - Refrain from calling routerlist_remove_old_routers() from
8011 check_descriptor_callback(). Instead, create a new hourly periodic
8012 event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
8014 o Minor bugfixes (pluggable transports):
8015 - Make sure that data is continously read from standard output and
8016 standard error pipes of a pluggable transport child-process, to
8017 avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
8018 bugfix on 0.2.3.6-alpha.
8020 o Minor bugfixes (unit tests):
8021 - Instead of relying on hs_free_all() to clean up all onion service
8022 objects in test_build_descriptors(), we now deallocate them one by
8023 one. This lets Coverity know that we are not leaking memory there
8024 and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
8026 o Minor bugfixes (usability):
8027 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
8028 Some users took this phrasing to mean that the mentioned guard was
8029 under their control or responsibility, which it is not. Fixes bug
8030 28895; bugfix on Tor 0.3.0.1-alpha.
8032 o Code simplification and refactoring:
8033 - Reimplement NETINFO cell parsing and generation to rely on
8034 trunnel-generated wire format handling code. Closes ticket 27325.
8035 - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
8037 - Rework SOCKS wire format handling to rely on trunnel-generated
8038 parsing/generation code. Resolves ticket 27620.
8039 - Split out bootstrap progress reporting from control.c into a
8040 separate file. Part of ticket 27402.
8041 - The .may_include files that we use to describe our directory-by-
8042 directory dependency structure now describe a noncircular
8043 dependency graph over the directories that they cover. Our
8044 checkIncludes.py tool now enforces this noncircularity. Closes
8048 - Mention that you cannot add a new onion service if Tor is already
8049 running with Sandbox enabled. Closes ticket 28560.
8050 - Improve ControlPort documentation. Mention that it accepts
8051 address:port pairs, and can be used multiple times. Closes
8053 - Document the exact output of "tor --version". Closes ticket 28889.
8056 - Stop responding to the 'GETINFO status/version/num-concurring' and
8057 'GETINFO status/version/num-versioning' control port commands, as
8058 those were deprecated back in 0.2.0.30. Also stop listing them in
8059 output of 'GETINFO info/names'. Resolves ticket 28757.
8060 - The scripts used to generate and maintain the list of fallback
8061 directories have been extracted into a new "fallback-scripts"
8062 repository. Closes ticket 27914.
8065 - Run shellcheck for scripts in the in scripts/ directory. Closes
8067 - Add unit tests for tokenize_string() and get_next_token()
8068 functions. Resolves ticket 27625.
8070 o Code simplification and refactoring (onion service v3):
8071 - Consolidate the authorized client descriptor cookie computation
8072 code from client and service into one function. Closes
8075 o Code simplification and refactoring (shell scripts):
8076 - Cleanup scan-build.sh to silence shellcheck warnings. Closes
8078 - Fix issues that shellcheck found in chutney-git-bisect.sh.
8079 Resolves ticket 28006.
8080 - Fix issues that shellcheck found in updateRustDependencies.sh.
8081 Resolves ticket 28012.
8082 - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
8083 - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
8084 - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
8085 - Fix shellcheck warnings in scripts/test/coverage. Resolves
8089 Changes in version 0.3.3.11 - 2019-01-07
8090 Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
8091 numerous fixes, including an important fix for anyone using OpenSSL
8092 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
8093 to this version, or to a later series.
8095 As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
8096 We anticipate that this will be the last release of Tor 0.3.3, unless
8097 some major bug is before then. Some time between now and then, users
8098 should switch to either the Tor 0.3.4 series (supported until at least
8099 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
8100 support until at least 1 Feb 2022.
8102 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
8103 - Fix our usage of named groups when running as a TLS 1.3 client in
8104 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8105 running as a relay, which caused clients to fail to negotiate TLS
8106 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8109 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
8110 - Fix a use-after-free error that could be caused by passing Tor an
8111 impossible set of options that would fail during options_act().
8112 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
8114 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
8115 - Only run one online rust build in Travis, to reduce network
8116 errors. Skip offline rust builds on Travis for Linux gcc, because
8117 they're redundant. Implements ticket 27252.
8118 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
8119 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
8120 Linux with default settings, because all the non-default builds
8121 use gcc on Linux. Implements ticket 27252.
8123 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
8124 - Use the Travis Homebrew addon to install packages on macOS during
8125 Travis CI. The package list is the same, but the Homebrew addon
8126 does not do a `brew update` by default. Implements ticket 27738.
8128 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
8129 - Replace the 150 fallbacks originally introduced in Tor
8130 0.3.3.1-alpha in January 2018 (of which ~115 were still
8131 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8132 removed) generated in December 2018. Closes ticket 24803.
8134 o Minor features (geoip):
8135 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
8136 Country database. Closes ticket 29012.
8138 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
8139 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8140 key export function from handling long labels. When this bug is
8141 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8142 version of OpenSSL without this bug when it becomes available.
8143 Closes ticket 28973.
8145 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
8146 - Update relay descriptor on bandwidth changes only when the uptime
8147 is smaller than 24h, in order to reduce the efficiency of guard
8148 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8150 o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
8151 - Avoid undefined behavior in an end-of-string check when parsing
8152 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8155 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
8156 - Rewrite our assertion macros so that they no longer suppress the
8157 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8159 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
8160 - Initialize a variable unconditionally in aes_new_cipher(), since
8161 some compilers cannot tell that we always initialize it before
8162 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8164 o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
8165 - Log additional info when we get a relay that shares an ed25519 ID
8166 with a different relay, instead making a BUG() warning. Fixes bug
8167 27800; bugfix on 0.3.2.1-alpha.
8169 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
8170 - When a user requests a group-readable DataDirectory, give it to
8171 them. Previously, when the DataDirectory and the CacheDirectory
8172 were the same, the default setting (0) for
8173 CacheDirectoryGroupReadable would override the setting for
8174 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8177 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
8178 - When the onion service directory can't be created or has the wrong
8179 permissions, do not log a stack trace. Fixes bug 27335; bugfix
8182 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
8183 - Close all SOCKS request (for the same .onion) if the newly fetched
8184 descriptor is unusable. Before that, we would close only the first
8185 one leaving the other hanging and let to time out by themselves.
8186 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8188 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8189 - Don't warn so loudly when Tor is unable to decode an onion
8190 descriptor. This can now happen as a normal use case if a client
8191 gets a descriptor with client authorization but the client is not
8192 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8194 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
8195 - When deleting an ephemeral onion service (DEL_ONION), do not close
8196 any rendezvous circuits in order to let the existing client
8197 connections finish by themselves or closed by the application. The
8198 HS v2 is doing that already so now we have the same behavior for
8199 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8201 o Minor bugfixes (HTTP tunnel):
8202 - Fix a bug warning when closing an HTTP tunnel connection due to
8203 an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
8206 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
8207 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8208 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8210 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
8211 - Ensure circuitmux queues are empty before scheduling or sending
8212 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
8214 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
8215 - Reject protocol names containing bytes other than alphanumeric
8216 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8219 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
8220 - Compute protover votes correctly in the rust version of the
8221 protover code. Previously, the protover rewrite in 24031 allowed
8222 repeated votes from the same voter for the same protocol version
8223 to be counted multiple times in protover_compute_vote(). Fixes bug
8224 27649; bugfix on 0.3.3.5-rc.
8225 - Reject protover names that contain invalid characters. Fixes bug
8226 27687; bugfix on 0.3.3.1-alpha.
8228 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
8229 - protover_all_supported() would attempt to allocate up to 16GB on
8230 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8231 bugfix on 0.3.3.5-rc.
8233 o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
8234 - Fix a potential null dereference in protover_all_supported(). Add
8235 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8236 - Return a string that can be safely freed by C code, not one
8237 created by the rust allocator, in protover_all_supported(). Fixes
8238 bug 27740; bugfix on 0.3.3.1-alpha.
8239 - Fix an API mismatch in the rust implementation of
8240 protover_compute_vote(). This bug could have caused crashes on any
8241 directory authorities running Tor with Rust (which we do not yet
8242 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8244 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
8245 - If a unit test running in a subprocess exits abnormally or with a
8246 nonzero status code, treat the test as having failed, even if the
8247 test reported success. Without this fix, memory leaks don't cause
8248 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
8249 bugfix on 0.2.2.4-alpha.
8251 o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
8252 - Treat backtrace test failures as expected on BSD-derived systems
8253 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8254 (FreeBSD failures have been treated as expected since 18204 in
8255 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8257 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
8258 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8259 bugfix on 0.3.0.1-alpha.
8262 Changes in version 0.3.4.10 - 2019-01-07
8263 Tor 0.3.4.9 is the second stable release in its series; it backports
8264 numerous fixes, including an important fix for relays, and for anyone
8265 using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
8268 As a reminder, the Tor 0.3.4 series will be supported until 10 June
8269 2019. Some time between now and then, users should switch to the Tor
8270 0.3.5 series, which will receive long-term support until at least 1
8273 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
8274 - Fix our usage of named groups when running as a TLS 1.3 client in
8275 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8276 running as a relay, which caused clients to fail to negotiate TLS
8277 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8280 o Major bugfixes (relay, directory, backport from 0.3.5.7):
8281 - Always reactivate linked connections in the main loop so long as
8282 any linked connection has been active. Previously, connections
8283 serving directory information wouldn't get reactivated after the
8284 first chunk of data was sent (usually 32KB), which would prevent
8285 clients from bootstrapping. Fixes bug 28912; bugfix on
8286 0.3.4.1-alpha. Patch by "cypherpunks3".
8288 o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
8289 - Always show the configure and test logs, and upload them as build
8290 artifacts, when building for Windows using Appveyor CI.
8293 o Minor features (controller, backport from 0.3.5.1-alpha):
8294 - For purposes of CIRC_BW-based dropped cell detection, track half-
8295 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
8296 bias check cells to arrive without counting it as dropped until
8297 either the END arrives, or the windows are empty. Closes
8300 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
8301 - Replace the 150 fallbacks originally introduced in Tor
8302 0.3.3.1-alpha in January 2018 (of which ~115 were still
8303 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8304 removed) generated in December 2018. Closes ticket 24803.
8306 o Minor features (geoip):
8307 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
8308 Country database. Closes ticket 28395.
8310 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
8311 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8312 key export function from handling long labels. When this bug is
8313 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8314 version of OpenSSL without this bug when it becomes available.
8315 Closes ticket 28973.
8317 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
8318 - Initialize a variable unconditionally in aes_new_cipher(), since
8319 some compilers cannot tell that we always initialize it before
8320 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8322 o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
8323 - Avoid a logging a BUG() stacktrace when closing connection held
8324 open because the write side is rate limited but not the read side.
8325 Now, the connection read side is simply shut down until Tor is
8326 able to flush the connection and close it. Fixes bug 27750; bugfix
8329 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
8330 - Manually configure the zstd compiler options, when building using
8331 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
8332 not come with a pkg-config file. Fixes bug 28454; bugfix
8334 - Stop using an external OpenSSL install, and stop installing MSYS2
8335 packages, when building using mingw on Appveyor Windows CI. Fixes
8336 bug 28399; bugfix on 0.3.4.1-alpha.
8338 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
8339 - Explicitly specify the path to the OpenSSL library and do not
8340 download OpenSSL from Pacman, but instead use the library that is
8341 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
8343 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
8344 - When a user requests a group-readable DataDirectory, give it to
8345 them. Previously, when the DataDirectory and the CacheDirectory
8346 were the same, the default setting (0) for
8347 CacheDirectoryGroupReadable would override the setting for
8348 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8351 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
8352 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8353 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8355 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8356 - Don't warn so loudly when Tor is unable to decode an onion
8357 descriptor. This can now happen as a normal use case if a client
8358 gets a descriptor with client authorization but the client is not
8359 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8361 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
8362 - When deleting an ephemeral onion service (DEL_ONION), do not close
8363 any rendezvous circuits in order to let the existing client
8364 connections finish by themselves or closed by the application. The
8365 HS v2 is doing that already so now we have the same behavior for
8366 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8368 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
8369 - Update relay descriptor on bandwidth changes only when the uptime
8370 is smaller than 24h, in order to reduce the efficiency of guard
8371 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8373 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
8374 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8375 bugfix on 0.3.0.1-alpha.
8378 Changes in version 0.3.5.7 - 2019-01-07
8379 Tor 0.3.5.7 is the first stable release in its series; it includes
8380 compilation and portability fixes, and a fix for a severe problem
8381 affecting directory caches.
8383 The Tor 0.3.5 series includes several new features and performance
8384 improvements, including client authorization for v3 onion services,
8385 cleanups to bootstrap reporting, support for improved bandwidth-
8386 measurement tools, experimental support for NSS in place of OpenSSL,
8387 and much more. It also begins a full reorganization of Tor's code
8388 layout, for improved modularity and maintainability in the future.
8389 Finally, there is the usual set of performance improvements and
8390 bugfixes that we try to do in every release series.
8392 There are a couple of changes in the 0.3.5 that may affect
8393 compatibility. First, the default version for newly created onion
8394 services is now v3. Use the HiddenServiceVersion option if you want to
8395 override this. Second, some log messages related to bootstrapping have
8396 changed; if you use stem, you may need to update to the latest version
8397 so it will recognize them.
8399 We have designated 0.3.5 as a "long-term support" (LTS) series: we
8400 will continue to patch major bugs in typical configurations of 0.3.5
8401 until at least 1 Feb 2022. (We do not plan to provide long-term
8402 support for embedding, Rust support, NSS support, running a directory
8403 authority, or unsupported platforms. For these, you will need to stick
8404 with the latest stable release.)
8406 Below are the changes since 0.3.5.6-rc. For a complete list of changes
8407 since 0.3.4.9, see the ReleaseNotes file.
8409 o Major bugfixes (relay, directory):
8410 - Always reactivate linked connections in the main loop so long as
8411 any linked connection has been active. Previously, connections
8412 serving directory information wouldn't get reactivated after the
8413 first chunk of data was sent (usually 32KB), which would prevent
8414 clients from bootstrapping. Fixes bug 28912; bugfix on
8415 0.3.4.1-alpha. Patch by "cypherpunks3".
8417 o Minor features (compilation):
8418 - When possible, place our warning flags in a separate file, to
8419 avoid flooding verbose build logs. Closes ticket 28924.
8421 o Minor features (geoip):
8422 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
8423 Country database. Closes ticket 29012.
8425 o Minor features (OpenSSL bug workaround):
8426 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8427 key export function from handling long labels. When this bug is
8428 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8429 version of OpenSSL without this bug when it becomes available.
8430 Closes ticket 28973.
8432 o Minor features (performance):
8433 - Remove about 96% of the work from the function that we run at
8434 startup to test our curve25519_basepoint implementation. Since
8435 this function has yet to find an actual failure, we now only run
8436 it for 8 iterations instead of 200. Based on our profile
8437 information, this change should save around 8% of our startup time
8438 on typical desktops, and may have a similar effect on other
8439 platforms. Closes ticket 28838.
8440 - Stop re-validating our hardcoded Diffie-Hellman parameters on
8441 every startup. Doing this wasted time and cycles, especially on
8442 low-powered devices. Closes ticket 28851.
8444 o Minor bugfixes (compilation):
8445 - Fix compilation for Android by adding a missing header to
8446 freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
8448 o Minor bugfixes (correctness):
8449 - Fix an unreached code path where we checked the value of
8450 "hostname" inside send_resolved_hostname_cell(). Previously, we
8451 used it before checking it; now we check it first. Fixes bug
8452 28879; bugfix on 0.1.2.7-alpha.
8454 o Minor bugfixes (testing):
8455 - Make sure that test_rebind.py actually obeys its timeout, even
8456 when it receives a large number of log messages. Fixes bug 28883;
8457 bugfix on 0.3.5.4-alpha.
8458 - Stop running stem's unit tests as part of "make test-stem", but
8459 continue to run stem's unit and online tests during "make test-
8460 stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
8462 o Minor bugfixes (windows services):
8463 - Make Tor start correctly as an NT service again: previously it was
8464 broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
8466 o Code simplification and refactoring:
8467 - When parsing a port configuration, make it more obvious to static
8468 analyzer tools that we always initialize the address. Closes
8472 Changes in version 0.3.5.6-rc - 2018-12-18
8473 Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
8474 It is the first release candidate in the 0.3.5.x series; if no further
8475 huge bugs are found, our next release may be the stable 0.3.5.x.
8477 o Minor features (continuous integration, Windows):
8478 - Always show the configure and test logs, and upload them as build
8479 artifacts, when building for Windows using Appveyor CI.
8482 o Minor features (fallback directory list):
8483 - Replace the 150 fallbacks originally introduced in Tor
8484 0.3.3.1-alpha in January 2018 (of which ~115 were still
8485 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8486 removed) generated in December 2018. Closes ticket 24803.
8488 o Minor features (geoip):
8489 - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
8490 Country database. Closes ticket 28744.
8492 o Minor bugfixes (compilation):
8493 - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
8494 cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
8496 o Minor bugfixes (continuous integration, Windows):
8497 - Explicitly specify the path to the OpenSSL library and do not
8498 download OpenSSL from Pacman, but instead use the library that is
8499 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
8501 o Minor bugfixes (onion service v3):
8502 - When deleting an ephemeral onion service (DEL_ONION), do not close
8503 any rendezvous circuits in order to let the existing client
8504 connections finish by themselves or closed by the application. The
8505 HS v2 is doing that already so now we have the same behavior for
8506 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8508 o Minor bugfixes (restart-in-process, boostrap):
8509 - Add missing resets of bootstrap tracking state when shutting down
8510 (regression caused by ticket 27169). Fixes bug 28524; bugfix
8513 o Minor bugfixes (testing):
8514 - Use a separate DataDirectory for the test_rebind script.
8515 Previously, this script would run using the default DataDirectory,
8516 and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
8517 Patch from Taylor R Campbell.
8518 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8519 bugfix on 0.3.0.1-alpha.
8521 o Minor bugfixes (Windows):
8522 - Correctly identify Windows 8.1, Windows 10, and Windows Server
8523 2008 and later from their NT versions. Fixes bug 28096; bugfix on
8524 0.2.2.34; reported by Keifer Bly.
8525 - On recent Windows versions, the GetVersionEx() function may report
8526 an earlier Windows version than the running OS. To avoid user
8527 confusion, add "[or later]" to Tor's version string on affected
8528 versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
8530 - Remove Windows versions that were never supported by the
8531 GetVersionEx() function. Stop duplicating the latest Windows
8532 version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
8533 reported by Keifer Bly.
8536 - Increase logging and tag all log entries with timestamps in
8537 test_rebind.py. Provides diagnostics for issue 28229.
8539 o Code simplification and refactoring (shared random, dirauth):
8540 - Change many tor_assert() to use BUG() instead. The idea is to not
8541 crash a dirauth but rather scream loudly with a stacktrace and let
8542 it continue run. The shared random subsystem is very resilient and
8543 if anything wrong happens with it, at worst a non coherent value
8544 will be put in the vote and discarded by the other authorities.
8545 Closes ticket 19566.
8547 o Documentation (onion services):
8548 - Document in the man page that changing ClientOnionAuthDir value or
8549 adding a new file in the directory will not work at runtime upon
8550 sending a HUP if Sandbox 1. Closes ticket 28128.
8551 - Note in the man page that the only real way to fully revoke an
8552 onion service v3 client authorization is by restarting the tor
8553 process. Closes ticket 28275.
8556 Changes in version 0.3.5.5-alpha - 2018-11-16
8557 Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
8558 including several that we hope to backport to older release series in
8561 o Major bugfixes (OpenSSL, portability):
8562 - Fix our usage of named groups when running as a TLS 1.3 client in
8563 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8564 running as a relay, which caused clients to fail to negotiate TLS
8565 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8568 o Minor features (geoip):
8569 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
8570 Country database. Closes ticket 28395.
8572 o Minor bugfixes (compilation):
8573 - Initialize a variable unconditionally in aes_new_cipher(), since
8574 some compilers cannot tell that we always initialize it before
8575 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8577 o Minor bugfixes (connection, relay):
8578 - Avoid a logging a BUG() stacktrace when closing connection held
8579 open because the write side is rate limited but not the read side.
8580 Now, the connection read side is simply shut down until Tor is
8581 able to flush the connection and close it. Fixes bug 27750; bugfix
8584 o Minor bugfixes (continuous integration, Windows):
8585 - Manually configure the zstd compiler options, when building using
8586 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
8587 not come with a pkg-config file. Fixes bug 28454; bugfix
8589 - Stop using an external OpenSSL install, and stop installing MSYS2
8590 packages, when building using mingw on Appveyor Windows CI. Fixes
8591 bug 28399; bugfix on 0.3.4.1-alpha.
8593 o Minor bugfixes (documentation):
8594 - Make Doxygen work again after the code movement in the 0.3.5
8595 source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
8597 o Minor bugfixes (Linux seccomp2 sandbox):
8598 - Permit the "shutdown()" system call, which is apparently used by
8599 OpenSSL under some circumstances. Fixes bug 28183; bugfix
8602 o Minor bugfixes (logging):
8603 - Stop talking about the Named flag in log messages. Clients have
8604 ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
8607 o Minor bugfixes (memory leaks):
8608 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8609 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8611 o Minor bugfixes (onion services):
8612 - On an intro point for a version 3 onion service, stop closing
8613 introduction circuits on an NACK. This lets the client decide
8614 whether to reuse the circuit or discard it. Previously, we closed
8615 intro circuits when sending NACKs. Fixes bug 27841; bugfix on
8616 0.3.2.1-alpha. Patch by Neel Chaunan.
8617 - When replacing a descriptor in the client cache, make sure to
8618 close all client introduction circuits for the old descriptor, so
8619 we don't end up with unusable leftover circuits. Fixes bug 27471;
8620 bugfix on 0.3.2.1-alpha.
8623 Changes in version 0.3.5.4-alpha - 2018-11-08
8624 Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
8625 improves our continuous integration support. It continues our attempts
8626 to stabilize this alpha branch and build it into a foundation for an
8627 acceptable long-term-support release.
8629 o Major bugfixes (compilation, rust):
8630 - Rust tests can now build and run successfully with the
8631 --enable-fragile-hardening option enabled. Doing this currently
8632 requires the rust beta channel; it will be possible with stable
8633 rust once Rust version 1.31 is released. Patch from Alex Crichton.
8634 Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
8636 o Major bugfixes (embedding, main loop):
8637 - When DisableNetwork becomes set, actually disable periodic events
8638 that are already enabled. (Previously, we would refrain from
8639 enabling new ones, but we would leave the old ones turned on.)
8640 Fixes bug 28348; bugfix on 0.3.4.1-alpha.
8642 o Minor features (continuous integration):
8643 - Add a Travis CI build for --enable-nss on Linux gcc. Closes
8645 - Add new CI job to Travis configuration to run stem-based
8646 integration tests. Closes ticket 27913.
8648 o Minor features (Windows, continuous integration):
8649 - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
8650 Appveyor's CI. Closes ticket 28318.
8652 o Minor bugfixes (C correctness, also in 0.3.4.9):
8653 - Avoid undefined behavior in an end-of-string check when parsing
8654 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8657 o Minor bugfixes (compilation):
8658 - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
8659 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
8661 o Minor bugfixes (compilation, OpenSolaris):
8662 - Fix compilation on OpenSolaris and its descendants by adding a
8663 missing include to compat_pthreads.c. Fixes bug 27963; bugfix
8666 o Minor bugfixes (configuration):
8667 - Refuse to start with relative file paths and RunAsDaemon set
8668 (regression from the fix for bug 22731). Fixes bug 28298; bugfix
8671 o Minor bugfixes (directory authority, also in 0.3.4.9):
8672 - Log additional info when we get a relay that shares an ed25519 ID
8673 with a different relay, instead of a BUG() warning with a
8674 backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
8676 o Minor bugfixes (onion service v3):
8677 - Build the service descriptor's signing key certificate before
8678 uploading, so we always have a fresh one: leaving no chances for
8679 it to expire service side. Fixes bug 27838; bugfix
8682 o Minor bugfixes (onion service v3, client authorization):
8683 - Fix an assert() when adding a client authorization for the first
8684 time and then sending a HUP signal to the service. Before that,
8685 Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
8687 o Minor bugfixes (onion services):
8688 - Unless we have explicitly set HiddenServiceVersion, detect the
8689 onion service version and then look for invalid options.
8690 Previously, we did the reverse, but that broke existing configs
8691 which were pointed to a v2 service and had options like
8692 HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
8693 0.3.5.1-alpha. Patch by Neel Chauhan.
8695 o Minor bugfixes (portability):
8696 - Make the OPE code (which is used for v3 onion services) run
8697 correctly on big-endian platforms. Fixes bug 28115; bugfix
8700 o Minor bugfixes (protover, rust):
8701 - Reject extra commas in version strings. Fixes bug 27197; bugfix
8704 o Minor bugfixes (relay shutdown, systemd):
8705 - Notify systemd of ShutdownWaitLength so it can be set to longer
8706 than systemd's TimeoutStopSec. In Tor's systemd service file, set
8707 TimeoutSec to 60 seconds to allow Tor some time to shut down.
8708 Fixes bug 28113; bugfix on 0.2.6.2-alpha.
8710 o Minor bugfixes (rust, also in 0.3.4.9):
8711 - Fix a potential null dereference in protover_all_supported(). Add
8712 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8713 - Return a string that can be safely freed by C code, not one
8714 created by the rust allocator, in protover_all_supported(). Fixes
8715 bug 27740; bugfix on 0.3.3.1-alpha.
8717 o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
8718 - Fix an API mismatch in the rust implementation of
8719 protover_compute_vote(). This bug could have caused crashes on any
8720 directory authorities running Tor with Rust (which we do not yet
8721 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8723 o Minor bugfixes (testing):
8724 - Avoid hangs and race conditions in test_rebind.py. Fixes bug
8725 27968; bugfix on 0.3.5.1-alpha.
8727 o Minor bugfixes (testing, also in 0.3.4.9):
8728 - Treat backtrace test failures as expected on BSD-derived systems
8729 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8730 (FreeBSD failures have been treated as expected since 18204 in
8731 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8733 o Documentation (onion service manpage):
8734 - Improve HSv3 client authorization by making some options more
8735 explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
8738 Changes in version 0.3.4.9 - 2018-11-02
8739 Tor 0.3.4.9 is the second stable release in its series; it backports
8740 numerous fixes, including a fix for a bandwidth management bug that
8741 was causing memory exhaustion on relays. Anyone running an earlier
8742 version of Tor 0.3.4.9 should upgrade.
8744 o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
8745 - Fix compilation on ARM (and other less-used CPUs) when compiling
8746 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
8748 o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
8749 - Make sure Tor bootstraps and works properly if only the
8750 ControlPort is set. Prior to this fix, Tor would only bootstrap
8751 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
8752 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
8754 o Major bugfixes (relay, backport from 0.3.5.3-alpha):
8755 - When our write bandwidth limit is exhausted, stop writing on the
8756 connection. Previously, we had a typo in the code that would make
8757 us stop reading instead, leading to relay connections being stuck
8758 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
8761 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
8762 - Fix a use-after-free error that could be caused by passing Tor an
8763 impossible set of options that would fail during options_act().
8764 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
8766 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
8767 - Don't do a distcheck with --disable-module-dirauth in Travis.
8768 Implements ticket 27252.
8769 - Only run one online rust build in Travis, to reduce network
8770 errors. Skip offline rust builds on Travis for Linux gcc, because
8771 they're redundant. Implements ticket 27252.
8772 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
8773 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
8774 Linux with default settings, because all the non-default builds
8775 use gcc on Linux. Implements ticket 27252.
8777 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
8778 - Use the Travis Homebrew addon to install packages on macOS during
8779 Travis CI. The package list is the same, but the Homebrew addon
8780 does not do a `brew update` by default. Implements ticket 27738.
8782 o Minor features (geoip):
8783 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
8784 Country database. Closes ticket 27991.
8786 o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
8787 - Fix an integer overflow bug in our optimized 32-bit millisecond-
8788 difference algorithm for 32-bit Apple platforms. Previously, it
8789 would overflow when calculating the difference between two times
8790 more than 47 days apart. Fixes part of bug 27139; bugfix
8792 - Improve the precision of our 32-bit millisecond difference
8793 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
8794 bugfix on 0.3.4.1-alpha.
8795 - Relax the tolerance on the mainloop/update_time_jumps test when
8796 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
8799 o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
8800 - Avoid undefined behavior in an end-of-string check when parsing
8801 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8804 o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
8805 - Only install the necessary mingw packages during our appveyor
8806 builds. This change makes the build a little faster, and prevents
8807 a conflict with a preinstalled mingw openssl that appveyor now
8808 ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
8810 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
8811 - Rewrite our assertion macros so that they no longer suppress the
8812 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8814 o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
8815 - Stop reinstalling identical packages in our Windows CI. Fixes bug
8816 27464; bugfix on 0.3.4.1-alpha.
8818 o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
8819 - Log additional info when we get a relay that shares an ed25519 ID
8820 with a different relay, instead making a BUG() warning. Fixes bug
8821 27800; bugfix on 0.3.2.1-alpha.
8823 o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
8824 - Avoid a double-close when shutting down a stalled directory
8825 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
8827 o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
8828 - Fix a bug warning when closing an HTTP tunnel connection due to an
8829 HTTP request we couldn't handle. Fixes bug 26470; bugfix
8832 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
8833 - Ensure circuitmux queues are empty before scheduling or sending
8834 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
8836 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
8837 - When the onion service directory can't be created or has the wrong
8838 permissions, do not log a stack trace. Fixes bug 27335; bugfix
8841 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
8842 - Close all SOCKS request (for the same .onion) if the newly fetched
8843 descriptor is unusable. Before that, we would close only the first
8844 one leaving the other hanging and let to time out by themselves.
8845 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8847 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8848 - When selecting a v3 rendezvous point, don't only look at the
8849 protover, but also check whether the curve25519 onion key is
8850 present. This way we avoid picking a relay that supports the v3
8851 rendezvous but for which we don't have the microdescriptor. Fixes
8852 bug 27797; bugfix on 0.3.2.1-alpha.
8854 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
8855 - Reject protocol names containing bytes other than alphanumeric
8856 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8859 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
8860 - Compute protover votes correctly in the rust version of the
8861 protover code. Previously, the protover rewrite in 24031 allowed
8862 repeated votes from the same voter for the same protocol version
8863 to be counted multiple times in protover_compute_vote(). Fixes bug
8864 27649; bugfix on 0.3.3.5-rc.
8865 - Reject protover names that contain invalid characters. Fixes bug
8866 27687; bugfix on 0.3.3.1-alpha.
8868 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
8869 - protover_all_supported() would attempt to allocate up to 16GB on
8870 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8871 bugfix on 0.3.3.5-rc.
8873 o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
8874 - Fix an API mismatch in the rust implementation of
8875 protover_compute_vote(). This bug could have caused crashes on any
8876 directory authorities running Tor with Rust (which we do not yet
8877 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8879 o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
8880 - Fix a potential null dereference in protover_all_supported(). Add
8881 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8882 - Return a string that can be safely freed by C code, not one
8883 created by the rust allocator, in protover_all_supported(). Fixes
8884 bug 27740; bugfix on 0.3.3.1-alpha.
8886 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
8887 - If a unit test running in a subprocess exits abnormally or with a
8888 nonzero status code, treat the test as having failed, even if the
8889 test reported success. Without this fix, memory leaks don't cause
8890 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
8891 bugfix on 0.2.2.4-alpha.
8893 o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
8894 - Make the hs_service tests use the same time source when creating
8895 the introduction point and when testing it. Now tests work better
8896 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
8899 o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
8900 - Treat backtrace test failures as expected on BSD-derived systems
8901 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8902 (FreeBSD failures have been treated as expected since 18204 in
8903 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8906 Changes in version 0.3.5.3-alpha - 2018-10-17
8907 Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
8908 versions. One important fix for relays addresses a problem with rate-
8909 limiting code from back in 0.3.4.x: If the fix works out, we'll be
8910 backporting it soon. This release is still an alpha, but we hope it's
8911 getting closer and closer to stability.
8913 o Major features (onion services):
8914 - Version 3 onion services can now use the per-service
8915 HiddenServiceExportCircuitID option to differentiate client
8916 circuits. It communicates with the service by using the HAProxy
8917 protocol to assign virtual IP addresses to inbound client
8918 circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
8920 o Major bugfixes (compilation):
8921 - Fix compilation on ARM (and other less-used CPUs) when compiling
8922 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
8924 o Major bugfixes (initialization, crash):
8925 - Fix an assertion crash that would stop Tor from starting up if it
8926 tried to activate a periodic event too early. Fixes bug 27861;
8927 bugfix on 0.3.5.1-alpha.
8929 o Major bugfixes (mainloop, bootstrap):
8930 - Make sure Tor bootstraps and works properly if only the
8931 ControlPort is set. Prior to this fix, Tor would only bootstrap
8932 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
8933 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
8935 o Major bugfixes (relay):
8936 - When our write bandwidth limit is exhausted, stop writing on the
8937 connection. Previously, we had a typo in the code that would make
8938 us stop reading instead, leading to relay connections being stuck
8939 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
8942 o Minor features (continuous integration):
8943 - Use the Travis Homebrew addon to install packages on macOS during
8944 Travis CI. The package list is the same, but the Homebrew addon
8945 does not do a `brew update` by default. Implements ticket 27738.
8946 - Report what program produced the mysterious core file that we
8947 occasionally see on Travis CI during make distcheck. Closes
8950 o Minor features (geoip):
8951 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
8952 Country database. Closes ticket 27991.
8954 o Minor bugfixes (code safety):
8955 - Rewrite our assertion macros so that they no longer suppress the
8956 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8959 o Minor bugfixes (compilation):
8960 - Compile the ed25519-donna code with a correct declaration of
8961 crypto_strongest_rand(). Previously, we built it with one type,
8962 but linked it against another in the unit tests, which caused
8963 compilation failures with LTO enabled. This could have caused
8964 other undefined behavior in the tests. Fixes bug 27728; bugfix
8967 o Minor bugfixes (compilation, netbsd):
8968 - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
8971 o Minor bugfixes (continuous integration, appveyor):
8972 - Install only the necessary mingw packages during our appveyor
8973 builds. This change makes the build a little faster, and prevents
8974 a conflict with a preinstalled mingw openssl that appveyor now
8975 ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
8977 o Minor bugfixes (directory permissions):
8978 - When a user requests a group-readable DataDirectory, give it to
8979 them. Previously, when the DataDirectory and the CacheDirectory
8980 were the same, the default setting (0) for
8981 CacheDirectoryGroupReadable would override the setting for
8982 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8985 o Minor bugfixes (memory leaks):
8986 - Fix a small memory leak when calling Tor with --dump-config. Fixes
8987 bug 27893; bugfix on 0.3.2.1-alpha.
8989 o Minor bugfixes (networking):
8990 - In retry_listeners_ports(), make sure that we're removing a member
8991 of old_conns smartlist at most once. Fixes bug 27808; bugfix
8993 - Refrain from attempting socket rebinding when old and new
8994 listeners are in different address families. Fixes bug 27928;
8995 bugfix on 0.3.5.1-alpha.
8997 o Minor bugfixes (onion service v3):
8998 - Stop dumping a stack trace when trying to connect to an intro
8999 point without having a descriptor for it. Fixes bug 27774; bugfix
9001 - Don't warn so loudly when Tor is unable to decode an onion
9002 descriptor. This can now happen as a normal use case if a client
9003 gets a descriptor with client authorization but the client is not
9004 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
9005 - When selecting a v3 rendezvous point, don't only look at the
9006 protover, but also check whether the curve25519 onion key is
9007 present. This way we avoid picking a relay that supports the v3
9008 rendezvous but for which we don't have the microdescriptor. Fixes
9009 bug 27797; bugfix on 0.3.2.1-alpha.
9011 o Minor bugfixes (protover):
9012 - Reject protocol names containing bytes other than alphanumeric
9013 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
9016 o Minor bugfixes (testing):
9017 - Make the hs_service tests use the same time source when creating
9018 the introduction point and when testing it. Now tests work better
9019 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
9021 - In test_rebind.py, check if the Python version is in the supported
9022 range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
9024 o Code simplification and refactoring:
9025 - Divide more large Tor source files -- especially ones that span
9026 multiple areas of functionality -- into smaller parts, including
9027 onion.c and main.c. Closes ticket 26747.
9028 - Divide the "routerparse.c" module into separate modules for each
9029 group of parsed objects. Closes ticket 27924.
9030 - Move protover_rust.c to the same place protover.c was moved to.
9031 Closes ticket 27814.
9032 - Split directory.c into separate pieces for client, server, and
9033 common functionality. Closes ticket 26744.
9034 - Split the non-statistics-related parts from the rephist.c and
9035 geoip.c modules. Closes ticket 27892.
9036 - Split the router.c file into relay-only and shared components, to
9037 help with future modularization. Closes ticket 27864.
9040 - In the tor-resolve(1) manpage, fix the reference to socks-
9041 extensions.txt by adding a web URL. Resolves ticket 27853.
9042 - Mention that we require Python to be 2.7 or newer for some
9043 integration tests that we ship with Tor. Resolves ticket 27677.
9046 Changes in version 0.3.5.2-alpha - 2018-09-21
9047 Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
9048 that made Tor think it had run out of sockets. Anybody running a relay
9049 or an onion service on 0.3.5.1-alpha should upgrade.
9051 o Major bugfixes (relay bandwidth statistics):
9052 - When we close relayed circuits, report the data in the circuit
9053 queues as being written in our relay bandwidth stats. This
9054 mitigates guard discovery and other attacks that close circuits
9055 for the explicit purpose of noticing this discrepancy in
9056 statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
9058 o Major bugfixes (socket accounting):
9059 - In our socket accounting code, count a socket as closed even when
9060 it is closed indirectly by the TLS layer. Previously, we would
9061 count these sockets as still in use, and incorrectly believe that
9062 we had run out of sockets. Fixes bug 27795; bugfix
9065 o Minor bugfixes (32-bit OSX and iOS, timing):
9066 - Fix an integer overflow bug in our optimized 32-bit millisecond-
9067 difference algorithm for 32-bit Apple platforms. Previously, it
9068 would overflow when calculating the difference between two times
9069 more than 47 days apart. Fixes part of bug 27139; bugfix
9071 - Improve the precision of our 32-bit millisecond difference
9072 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
9073 bugfix on 0.3.4.1-alpha.
9074 - Relax the tolerance on the mainloop/update_time_jumps test when
9075 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
9078 o Minor bugfixes (onion service v3):
9079 - Close all SOCKS request (for the same .onion) if the newly fetched
9080 descriptor is unusable. Before that, we would close only the first
9081 one leaving the other hanging and let to time out by themselves.
9082 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
9084 o Minor bugfixes (memory leak):
9085 - Fix an unlikely memory leak when trying to read a private key from
9086 a ridiculously large file. Fixes bug 27764; bugfix on
9087 0.3.5.1-alpha. This is CID 1439488.
9089 o Minor bugfixes (NSS):
9090 - Correctly detect failure to open a dummy TCP socket when stealing
9091 ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
9094 o Minor bugfixes (rust):
9095 - protover_all_supported() would attempt to allocate up to 16GB on
9096 some inputs, leading to a potential memory DoS. Fixes bug 27206;
9097 bugfix on 0.3.3.5-rc.
9099 o Minor bugfixes (testing):
9100 - Revise the "conditionvar_timeout" test so that it succeeds even on
9101 heavily loaded systems where the test threads are not scheduled
9102 within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
9104 o Code simplification and refactoring:
9105 - Divide the routerlist.c and dirserv.c modules into smaller parts.
9106 Closes ticket 27799.
9109 Changes in version 0.3.5.1-alpha - 2018-09-18
9110 Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
9111 client authorization for modern (v3) onion services, improves
9112 bootstrap reporting, begins reorganizing Tor's codebase, adds optional
9113 support for NSS in place of OpenSSL, and much more.
9115 o Major features (onion services, UI change):
9116 - For a newly created onion service, the default version is now 3.
9117 Tor still supports existing version 2 services, but the operator
9118 now needs to set "HiddenServiceVersion 2" in order to create a new
9119 version 2 service. For existing services, Tor now learns the
9120 version by reading the key file. Closes ticket 27215.
9122 o Major features (relay, UI change):
9123 - Relays no longer run as exits by default. If the "ExitRelay"
9124 option is auto (or unset), and no exit policy is specified with
9125 ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
9126 Previously in this case, we allowed exit traffic and logged a
9127 warning message. Closes ticket 21530. Patch by Neel Chauhan.
9128 - Tor now validates that the ContactInfo config option is valid UTF-
9129 8 when parsing torrc. Closes ticket 27428.
9131 o Major features (bootstrap):
9132 - Don't report directory progress until after a connection to a
9133 relay or bridge has succeeded. Previously, we'd report 80%
9134 progress based on cached directory information when we couldn't
9135 even connect to the network. Closes ticket 27169.
9137 o Major features (new code layout):
9138 - Nearly all of Tor's source code has been moved around into more
9139 logical places. The "common" directory is now divided into a set
9140 of libraries in "lib", and files in the "or" directory have been
9141 split into "core" (logic absolutely needed for onion routing),
9142 "feature" (independent modules in Tor), and "app" (to configure
9143 and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
9144 more information. Closes ticket 26481.
9146 This refactoring is not complete: although the libraries have been
9147 refactored to be acyclic, the main body of Tor is still too
9148 interconnected. We will attempt to improve this in the future.
9150 o Major features (onion services v3):
9151 - Implement onion service client authorization at the descriptor
9152 level: only authorized clients can decrypt a service's descriptor
9153 to find out how to contact it. A new torrc option was added to
9154 control this client side: ClientOnionAuthDir <path>. On the
9155 service side, if the "authorized_clients/" directory exists in the
9156 onion service directory path, client configurations are read from
9157 the files within. See the manpage for more details. Closes ticket
9158 27547. Patch done by Suphanat Chunhapanya (haxxpop).
9159 - Improve revision counter generation in next-gen onion services.
9160 Onion services can now scale by hosting multiple instances on
9161 different hosts without synchronization between them, which was
9162 previously impossible because descriptors would get rejected by
9163 HSDirs. Addresses ticket 25552.
9165 o Major features (portability, cryptography, experimental, TLS):
9166 - Tor now has the option to compile with the NSS library instead of
9167 OpenSSL. This feature is experimental, and we expect that bugs may
9168 remain. It is mainly intended for environments where Tor's
9169 performance is not CPU-bound, and where NSS is already known to be
9170 installed. To try it out, configure Tor with the --enable-nss
9171 flag. Closes tickets 26631, 26815, and 26816.
9173 If you are experimenting with this option and using an old cached
9174 consensus, Tor may fail to start. To solve this, delete your
9175 "cached-consensus" and "cached-microdesc-consensus" files,
9176 (if present), and restart Tor.
9178 o Major bugfixes (directory authority):
9179 - Actually check that the address we get from DirAuthority
9180 configuration line is valid IPv4. Explicitly disallow DirAuthority
9181 address to be a DNS hostname. Fixes bug 26488; bugfix
9184 o Major bugfixes (restart-in-process):
9185 - Fix a use-after-free error that could be caused by passing Tor an
9186 impossible set of options that would fail during options_act().
9187 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
9189 o Minor features (admin tools):
9190 - Add a new --key-expiration option to print the expiration date of
9191 the signing cert in an ed25519_signing_cert file. Resolves
9194 o Minor features (build):
9195 - If you pass the "--enable-pic" option to configure, Tor will try
9196 to tell the compiler to build position-independent code suitable
9197 to link into a dynamic library. (The default remains -fPIE, for
9198 code suitable for a relocatable executable.) Closes ticket 23846.
9200 o Minor features (code correctness, testing):
9201 - Tor's build process now includes a "check-includes" make target to
9202 verify that no module of Tor relies on any headers from a higher-
9203 level module. We hope to use this feature over time to help
9204 refactor our codebase. Closes ticket 26447.
9206 o Minor features (code layout):
9207 - We have a new "lowest-level" error-handling API for use by code
9208 invoked from within the logging module. With this interface, the
9209 logging code is no longer at risk of calling into itself if a
9210 failure occurs while it is trying to log something. Closes
9213 o Minor features (compilation):
9214 - Tor's configure script now supports a --with-malloc= option to
9215 select your malloc implementation. Supported options are
9216 "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
9217 default). Addresses part of ticket 20424. Based on a patch from
9220 o Minor features (config):
9221 - The "auto" keyword in torrc is now case-insensitive. Closes
9224 o Minor features (continuous integration):
9225 - Don't do a distcheck with --disable-module-dirauth in Travis.
9226 Implements ticket 27252.
9227 - Install libcap-dev and libseccomp2-dev so these optional
9228 dependencies get tested on Travis CI. Closes ticket 26560.
9229 - Only run one online rust build in Travis, to reduce network
9230 errors. Skip offline rust builds on Travis for Linux gcc, because
9231 they're redundant. Implements ticket 27252.
9232 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
9233 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
9234 Linux with default settings, because all the non-default builds
9235 use gcc on Linux. Implements ticket 27252.
9237 o Minor features (controller):
9238 - Emit CIRC_BW events as soon as we detect that we processed an
9239 invalid or otherwise dropped cell on a circuit. This allows
9240 vanguards and other controllers to react more quickly to dropped
9241 cells. Closes ticket 27678.
9242 - For purposes of CIRC_BW-based dropped cell detection, track half-
9243 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
9244 bias check cells to arrive without counting it as dropped until
9245 either the END arrives, or the windows are empty. Closes
9247 - Implement a 'GETINFO md/all' controller command to enable getting
9248 all known microdescriptors. Closes ticket 8323.
9249 - The GETINFO command now support an "uptime" argument, to return
9250 Tor's uptime in seconds. Closes ticket 25132.
9252 o Minor features (denial-of-service avoidance):
9253 - Make our OOM handler aware of the DNS cache so that it doesn't
9254 fill up the memory. This check is important for our DoS mitigation
9255 subsystem. Closes ticket 18642. Patch by Neel Chauhan.
9257 o Minor features (development):
9258 - Tor's makefile now supports running the "clippy" Rust style tool
9259 on our Rust code. Closes ticket 22156.
9261 o Minor features (directory authority):
9262 - There is no longer an artificial upper limit on the length of
9263 bandwidth lines. Closes ticket 26223.
9264 - When a bandwidth file is used to obtain the bandwidth measurements,
9265 include this bandwidth file headers in the votes. Closes
9267 - Improved support for networks with only a single authority or a
9268 single fallback directory. Patch from Gabriel Somlo. Closes
9271 o Minor features (embedding API):
9272 - The Tor controller API now supports a function to launch Tor with
9273 a preconstructed owning controller FD, so that embedding
9274 applications don't need to manage controller ports and
9275 authentication. Closes ticket 24204.
9276 - The Tor controller API now has a function that returns the name
9277 and version of the backend implementing the API. Closes
9280 o Minor features (geoip):
9281 - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
9282 Country database. Closes ticket 27631.
9284 o Minor features (memory management):
9285 - Get Libevent to use the same memory allocator as Tor, by calling
9286 event_set_mem_functions() during initialization. Resolves
9289 o Minor features (memory usage):
9290 - When not using them, store legacy TAP public onion keys in DER-
9291 encoded format, rather than as expanded public keys. This should
9292 save several megabytes on typical clients. Closes ticket 27246.
9294 o Minor features (OpenSSL):
9295 - When possible, use RFC5869 HKDF implementation from OpenSSL rather
9296 than our own. Resolves ticket 19979.
9298 o Minor features (Rust, code quality):
9299 - Improve rust code quality in the rust protover implementation by
9300 making it more idiomatic. Includes changing an internal API to
9301 take &str instead of &String. Closes ticket 26492.
9303 o Minor features (testing):
9304 - Add scripts/test/chutney-git-bisect.sh, for bisecting using
9305 chutney. Implements ticket 27211.
9307 o Minor features (tor-resolve):
9308 - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
9309 Side-effect of the refactoring for ticket 26526.
9311 o Minor features (UI):
9312 - Log each included configuration file or directory as we read it,
9313 to provide more visibility about where Tor is reading from. Patch
9314 from Unto Sten; closes ticket 27186.
9315 - Lower log level of "Scheduler type KIST has been enabled" to INFO.
9316 Closes ticket 26703.
9318 o Minor bugfixes (bootstrap):
9319 - Try harder to get descriptors in non-exit test networks, by using
9320 the mid weight for the third hop when there are no exits. Fixes
9321 bug 27237; bugfix on 0.2.6.2-alpha.
9323 o Minor bugfixes (C correctness):
9324 - Avoid casting smartlist index to int implicitly, as it may trigger
9325 a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
9326 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
9327 - Use time_t for all values in
9328 predicted_ports_prediction_time_remaining(). Rework the code that
9329 computes difference between durations/timestamps. Fixes bug 27165;
9330 bugfix on 0.3.1.1-alpha.
9332 o Minor bugfixes (client, memory usage):
9333 - When not running as a directory cache, there is no need to store
9334 the text of the current consensus networkstatus in RAM.
9335 Previously, however, clients would store it anyway, at a cost of
9336 over 5 MB. Now, they do not. Fixes bug 27247; bugfix
9339 o Minor bugfixes (client, reachableaddresses):
9340 - Instead of adding a "reject *:*" line to ReachableAddresses when
9341 loading the configuration, add one to the policy after parsing it
9342 in parse_reachable_addresses(). This prevents extra "reject *.*"
9343 lines from accumulating on reloads. Fixes bug 20874; bugfix on
9344 0.1.1.5-alpha. Patch by Neel Chauhan.
9346 o Minor bugfixes (code quality):
9347 - Rename sandbox_getaddrinfo() and other functions to no longer
9348 misleadingly suggest that they are sandbox-only. Fixes bug 26525;
9349 bugfix on 0.2.7.1-alpha.
9351 o Minor bugfixes (configuration, Onion Services):
9352 - In rend_service_parse_port_config(), disallow any input to remain
9353 after address-port pair was parsed. This will catch address and
9354 port being whitespace-separated by mistake of the user. Fixes bug
9355 27044; bugfix on 0.2.9.10.
9357 o Minor bugfixes (continuous integration):
9358 - Stop reinstalling identical packages in our Windows CI. Fixes bug
9359 27464; bugfix on 0.3.4.1-alpha.
9361 o Minor bugfixes (controller):
9362 - Consider all routerinfo errors other than "not a server" to be
9363 transient for the purpose of "GETINFO exit-policy/*" controller
9364 request. Print stacktrace in the unlikely case of failing to
9365 recompute routerinfo digest. Fixes bug 27034; bugfix
9368 o Minor bugfixes (directory connection shutdown):
9369 - Avoid a double-close when shutting down a stalled directory
9370 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
9372 o Minor bugfixes (HTTP tunnel):
9373 - Fix a bug warning when closing an HTTP tunnel connection due to an
9374 HTTP request we couldn't handle. Fixes bug 26470; bugfix
9377 o Minor bugfixes (ipv6):
9378 - In addrs_in_same_network_family(), we choose the subnet size based
9379 on the IP version (IPv4 or IPv6). Previously, we chose a fixed
9380 subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
9381 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
9383 o Minor bugfixes (logging):
9384 - As a precaution, do an early return from log_addr_has_changed() if
9385 Tor is running as client. Also, log a stack trace for debugging as
9386 this function should only be called when Tor runs as server. Fixes
9387 bug 26892; bugfix on 0.1.1.9-alpha.
9388 - Refrain from mentioning bug 21018 in the logs, as it is already
9389 fixed. Fixes bug 25477; bugfix on 0.2.9.8.
9391 o Minor bugfixes (logging, documentation):
9392 - When SafeLogging is enabled, scrub IP address in
9393 channel_tls_process_netinfo_cell(). Also, add a note to manpage
9394 that scrubbing is not guaranteed on loglevels below Notice. Fixes
9395 bug 26882; bugfix on 0.2.4.10-alpha.
9397 o Minor bugfixes (netflow padding):
9398 - Ensure circuitmux queues are empty before scheduling or sending
9399 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
9401 o Minor bugfixes (onion service v2):
9402 - Log at level "info", not "warning", in the case that we do not
9403 have a consensus when a .onion request comes in. This can happen
9404 normally while bootstrapping. Fixes bug 27040; bugfix
9407 o Minor bugfixes (onion service v3):
9408 - When the onion service directory can't be created or has the wrong
9409 permissions, do not log a stack trace. Fixes bug 27335; bugfix
9412 o Minor bugfixes (OS compatibility):
9413 - Properly handle configuration changes that move a listener to/from
9414 wildcard IP address. If the first attempt to bind a socket fails,
9415 close the old listener and try binding the socket again. Fixes bug
9416 17873; bugfix on 0.0.8pre-1.
9418 o Minor bugfixes (performance)::
9419 - Rework node_is_a_configured_bridge() to no longer call
9420 node_get_all_orports(), which was performing too many memory
9421 allocations. Fixes bug 27224; bugfix on 0.2.3.9.
9423 o Minor bugfixes (relay statistics):
9424 - Update relay descriptor on bandwidth changes only when the uptime
9425 is smaller than 24h, in order to reduce the efficiency of guard
9426 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
9428 o Minor bugfixes (relays):
9429 - Consider the fact that we'll be making direct connections to our
9430 entry and guard nodes when computing the fraction of nodes that
9431 have their descriptors. Also, if we are using bridges and there is
9432 at least one bridge with a full descriptor, treat the fraction of
9433 guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
9434 Patch by Neel Chauhan.
9435 - Update the message logged on relays when DirCache is disabled.
9436 Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
9437 Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
9439 o Minor bugfixes (rust, protover):
9440 - Compute protover votes correctly in the rust version of the
9441 protover code. Previously, the protover rewrite in 24031 allowed
9442 repeated votes from the same voter for the same protocol version
9443 to be counted multiple times in protover_compute_vote(). Fixes bug
9444 27649; bugfix on 0.3.3.5-rc.
9445 - Reject protover names that contain invalid characters. Fixes bug
9446 27687; bugfix on 0.3.3.1-alpha.
9448 o Minor bugfixes (testing):
9449 - Fix two unit tests to work when HOME environment variable is not
9450 set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
9451 - If a unit test running in a subprocess exits abnormally or with a
9452 nonzero status code, treat the test as having failed, even if the
9453 test reported success. Without this fix, memory leaks don't cause
9454 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
9455 bugfix on 0.2.2.4-alpha.
9456 - When logging a version mismatch in our openssl_version tests,
9457 report the actual offending version strings. Fixes bug 26152;
9458 bugfix on 0.2.9.1-alpha.
9459 - Fix forking tests on Windows when there is a space somewhere in
9460 the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
9462 o Code simplification and refactoring:
9463 - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
9464 longer needed. Closes ticket 26502.
9465 - Include paths to header files within Tor are now qualified by
9466 directory within the top-level src directory.
9467 - Many structures have been removed from the centralized "or.h"
9468 header, and moved into their own headers. This will allow us to
9469 reduce the number of places in the code that rely on each
9470 structure's contents and layout. Closes ticket 26383.
9471 - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
9472 - Remove GetAdaptersAddresses_fn_t. The code that used it was
9473 removed as part of the 26481 refactor. Closes ticket 27467.
9474 - Rework Tor SOCKS server code to use Trunnel and benefit from
9475 autogenerated functions for parsing and generating SOCKS wire
9476 format. New implementation is cleaner, more maintainable and
9477 should be less prone to heartbleed-style vulnerabilities.
9478 Implements a significant fraction of ticket 3569.
9479 - Split sampled_guards_update_from_consensus() and
9480 select_entry_guard_for_circuit() into subfunctions. In
9481 entry_guards_update_primary() unite three smartlist enumerations
9482 into one and move smartlist comparison code out of the function.
9483 Closes ticket 21349.
9484 - Tor now assumes that you have standards-conformant stdint.h and
9485 inttypes.h headers when compiling. Closes ticket 26626.
9486 - Unify our bloom filter logic. Previously we had two copies of this
9487 code: one for routerlist filtering, and one for address set
9488 calculations. Closes ticket 26510.
9489 - Use the simpler strcmpstart() helper in
9490 rend_parse_v2_service_descriptor instead of strncmp(). Closes
9492 - Utility functions that can perform a DNS lookup are now wholly
9493 separated from those that can't, in separate headers and C
9494 modules. Closes ticket 26526.
9497 - Copy paragraph and URL to Tor's code of conduct document from
9498 CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
9499 - Remove old instructions from INSTALL document. Closes ticket 26588.
9500 - Warn users that they should not include MyFamily line(s) in their
9501 torrc when running Tor bridge. Closes ticket 26908.
9504 - Tor no longer supports building with the dmalloc library. For
9505 debugging memory issues, we suggest using gperftools or msan
9506 instead. Closes ticket 26426.
9507 - Tor no longer attempts to run on Windows environments without the
9508 GetAdaptersAddresses() function. This function has existed since
9509 Windows XP, which is itself already older than we support.
9510 - Remove Tor2web functionality for version 2 onion services. The
9511 Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
9512 (This feature was never shipped in vanilla Tor and it was only
9513 possible to use this feature by building the support at compile
9514 time. Tor2webMode is not implemented for version 3 onion services.)
9515 Closes ticket 26367.
9518 Changes in version 0.2.9.17 - 2018-09-10
9519 Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
9521 o Minor features (compatibility, backport from 0.3.4.8):
9522 - Tell OpenSSL to maintain backward compatibility with previous
9523 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9524 ciphers are disabled by default. Closes ticket 27344.
9526 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9527 - Enable macOS builds in our Travis CI configuration. Closes
9529 - Install libcap-dev and libseccomp2-dev so these optional
9530 dependencies get tested on Travis CI. Closes ticket 26560.
9531 - Run asciidoc during Travis CI. Implements ticket 27087.
9532 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9534 o Minor features (geoip):
9535 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9536 Country database. Closes ticket 27089.
9538 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9539 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9540 tell the compiler not to include the system malloc implementation.
9541 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9543 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9544 - Silence a spurious compiler warning on the GetAdaptersAddresses
9545 function pointer cast. This issue is already fixed by 26481 in
9546 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9547 bugfix on 0.2.3.11-alpha.
9548 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9549 supported, and always fails. Some compilers warn about the
9550 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9553 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9554 - Don't link or search for pthreads when building for Windows, even
9555 if we are using build environment (like mingw) that provides a
9556 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9558 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9559 - Skip a pair of unreliable key generation tests on Windows, until
9560 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9561 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9563 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9564 - Pass the module flags to distcheck configure, and log the flags
9565 before running configure. (Backported to 0.2.9 and later as a
9566 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9568 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9569 - When a Travis build fails, and showing a log fails, keep trying to
9570 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9571 - When we use echo in Travis, don't pass a --flag as the first
9572 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9574 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9575 - When voting for recommended versions, make sure that all of the
9576 versions are well-formed and parsable. Fixes bug 26485; bugfix
9579 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9580 - Fix a bug in out sandboxing rules for the openat() syscall.
9581 Previously, no openat() call would be permitted, which would break
9582 filesystem operations on recent glibc versions. Fixes bug 25440;
9583 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9585 o Minor bugfixes (onion services, backport from 0.3.4.8):
9586 - Silence a spurious compiler warning in
9587 rend_client_send_introduction(). Fixes bug 27463; bugfix
9590 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9591 - Log a protocol warning when single onion services or Tor2web clients
9592 fail to authenticate direct connections to relays.
9593 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9595 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9596 - Disable core dumps in test_bt.sh, to avoid failures in "make
9597 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9599 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9600 - Before running make test-network-all, delete old logs and test
9601 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9604 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9605 - Our "tortls/cert_matches_key" unit test no longer relies on
9606 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9607 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9608 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9610 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9611 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9612 27185; bugfix on 0.2.2.2-alpha.
9615 Changes in version 0.3.2.12 - 2018-09-10
9616 Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
9618 o Minor features (compatibility, backport from 0.3.4.8):
9619 - Tell OpenSSL to maintain backward compatibility with previous
9620 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9621 ciphers are disabled by default. Closes ticket 27344.
9623 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9624 - Enable macOS builds in our Travis CI configuration. Closes
9626 - Install libcap-dev and libseccomp2-dev so these optional
9627 dependencies get tested on Travis CI. Closes ticket 26560.
9628 - Run asciidoc during Travis CI. Implements ticket 27087.
9629 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9631 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
9632 - Use cargo cache in our Travis CI configuration. Closes
9635 o Minor features (controller, backport from 0.3.4.6-rc):
9636 - The control port now exposes the list of HTTPTunnelPorts and
9637 ExtOrPorts via GETINFO net/listeners/httptunnel and
9638 net/listeners/extor respectively. Closes ticket 26647.
9640 o Minor features (directory authorities, backport from 0.3.4.7-rc):
9641 - Authorities no longer vote to make the subprotocol version
9642 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
9643 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
9645 o Minor features (geoip):
9646 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9647 Country database. Closes ticket 27089.
9649 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9650 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9651 tell the compiler not to include the system malloc implementation.
9652 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9653 - Don't try to use a pragma to temporarily disable the
9654 -Wunused-const-variable warning if the compiler doesn't support
9655 it. Fixes bug 26785; bugfix on 0.3.2.11.
9657 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9658 - Silence a spurious compiler warning on the GetAdaptersAddresses
9659 function pointer cast. This issue is already fixed by 26481 in
9660 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9661 bugfix on 0.2.3.11-alpha.
9662 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9663 supported, and always fails. Some compilers warn about the
9664 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9667 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9668 - Don't link or search for pthreads when building for Windows, even
9669 if we are using build environment (like mingw) that provides a
9670 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9672 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9673 - Skip a pair of unreliable key generation tests on Windows, until
9674 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9675 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9677 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9678 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
9679 - Pass the module flags to distcheck configure, and log the flags
9680 before running configure. (Backported to 0.2.9 and later as a
9681 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9683 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9684 - When a Travis build fails, and showing a log fails, keep trying to
9685 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9686 - When we use echo in Travis, don't pass a --flag as the first
9687 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9689 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9690 - When voting for recommended versions, make sure that all of the
9691 versions are well-formed and parsable. Fixes bug 26485; bugfix
9694 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9695 - Fix a bug in out sandboxing rules for the openat() syscall.
9696 Previously, no openat() call would be permitted, which would break
9697 filesystem operations on recent glibc versions. Fixes bug 25440;
9698 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9700 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
9701 - Improve the log message when connection initiators fail to
9702 authenticate direct connections to relays. Fixes bug 26927; bugfix
9705 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
9706 - Fix bug that causes services to not ever rotate their descriptors
9707 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
9710 o Minor bugfixes (onion services, backport from 0.3.4.8):
9711 - Silence a spurious compiler warning in
9712 rend_client_send_introduction(). Fixes bug 27463; bugfix
9715 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
9716 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
9718 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
9719 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
9720 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
9721 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
9723 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9724 - Log a protocol warning when single onion services or Tor2web clients
9725 fail to authenticate direct connections to relays.
9726 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9728 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9729 - Disable core dumps in test_bt.sh, to avoid failures in "make
9730 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9732 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9733 - When running make test-network-all, use the mixed+hs-v2 network.
9734 (A previous fix to chutney removed v3 onion services from the
9735 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
9736 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
9737 - Before running make test-network-all, delete old logs and test
9738 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9741 o Minor bugfixes (testing, openssl compatibility):
9742 - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
9743 internals. Previously, it relied on unsupported OpenSSL behavior in
9744 a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
9745 bugfix on 0.2.5.1-alpha.
9747 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9748 - Our "tortls/cert_matches_key" unit test no longer relies on
9749 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9750 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9751 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9753 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9754 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9755 27185; bugfix on 0.2.2.2-alpha.
9758 Changes in version 0.3.3.10 - 2018-09-10
9759 Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
9761 o Minor features (bug workaround, backport from 0.3.4.7-rc):
9762 - Compile correctly on systems that provide the C11 stdatomic.h
9763 header, but where C11 atomic functions don't actually compile.
9764 Closes ticket 26779; workaround for Debian issue 903709.
9766 o Minor features (compatibility, backport from 0.3.4.8):
9767 - Tell OpenSSL to maintain backward compatibility with previous
9768 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9769 ciphers are disabled by default. Closes ticket 27344.
9771 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9772 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
9773 - Enable macOS builds in our Travis CI configuration. Closes
9775 - Install libcap-dev and libseccomp2-dev so these optional
9776 dependencies get tested on Travis CI. Closes ticket 26560.
9777 - Run asciidoc during Travis CI. Implements ticket 27087.
9778 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9780 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
9781 - Use cargo cache in our Travis CI configuration. Closes
9784 o Minor features (controller, backport from 0.3.4.6-rc):
9785 - The control port now exposes the list of HTTPTunnelPorts and
9786 ExtOrPorts via GETINFO net/listeners/httptunnel and
9787 net/listeners/extor respectively. Closes ticket 26647.
9789 o Minor features (directory authorities, backport from 0.3.4.7-rc):
9790 - Authorities no longer vote to make the subprotocol version
9791 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
9792 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
9794 o Minor features (geoip):
9795 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9796 Country database. Closes ticket 27089.
9798 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9799 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9800 tell the compiler not to include the system malloc implementation.
9801 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9802 - Don't try to use a pragma to temporarily disable the
9803 -Wunused-const-variable warning if the compiler doesn't support
9804 it. Fixes bug 26785; bugfix on 0.3.2.11.
9806 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9807 - Silence a spurious compiler warning on the GetAdaptersAddresses
9808 function pointer cast. This issue is already fixed by 26481 in
9809 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9810 bugfix on 0.2.3.11-alpha.
9811 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9812 supported, and always fails. Some compilers warn about the
9813 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9816 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9817 - Don't link or search for pthreads when building for Windows, even
9818 if we are using build environment (like mingw) that provides a
9819 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9821 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9822 - Skip a pair of unreliable key generation tests on Windows, until
9823 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9824 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9826 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9827 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
9828 - Pass the module flags to distcheck configure, and log the flags
9829 before running configure. (Backported to 0.2.9 and later as a
9830 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9832 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9833 - When a Travis build fails, and showing a log fails, keep trying to
9834 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9835 - When we use echo in Travis, don't pass a --flag as the first
9836 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9838 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9839 - When voting for recommended versions, make sure that all of the
9840 versions are well-formed and parsable. Fixes bug 26485; bugfix
9843 o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
9844 - Always call tor_free_all() when leaving tor_run_main(). When we
9845 did not, restarting tor in-process would cause an assertion
9846 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
9848 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9849 - Fix a bug in our sandboxing rules for the openat() syscall.
9850 Previously, no openat() call would be permitted, which would break
9851 filesystem operations on recent glibc versions. Fixes bug 25440;
9852 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9854 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
9855 - Improve the log message when connection initiators fail to
9856 authenticate direct connections to relays. Fixes bug 26927; bugfix
9859 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
9860 - Fix bug that causes services to not ever rotate their descriptors
9861 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
9864 o Minor bugfixes (onion services, backport from 0.3.4.8):
9865 - Silence a spurious compiler warning in
9866 rend_client_send_introduction(). Fixes bug 27463; bugfix
9869 o Minor bugfixes (portability, backport from 0.3.4.6-rc):
9870 - Work around two different bugs in the OS X 10.10 and later SDKs
9871 that would prevent us from successfully targeting earlier versions
9872 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
9874 o Minor bugfixes (portability, backport from 0.3.4.7-rc):
9875 - Fix compilation of the unit tests on GNU/Hurd, which does not
9876 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
9879 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
9880 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
9882 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
9883 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
9884 - Protover parsing was accepting the presence of whitespace in
9885 version strings, which the C implementation would choke on, e.g.
9886 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
9887 - Protover parsing was ignoring a 2nd hyphen and everything after
9888 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
9890 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
9891 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
9892 - cd to ${abs_top_builddir}/src/rust before running cargo in
9893 src/test/test_rust.sh. This makes the working directory consistent
9894 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
9896 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9897 - Log a protocol warning when single onion services or Tor2web clients
9898 fail to authenticate direct connections to relays.
9899 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9901 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9902 - Disable core dumps in test_bt.sh, to avoid failures in "make
9903 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9905 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9906 - When running make test-network-all, use the mixed+hs-v2 network.
9907 (A previous fix to chutney removed v3 onion services from the
9908 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
9909 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
9910 - Before running make test-network-all, delete old logs and test
9911 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9914 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9915 - Our "tortls/cert_matches_key" unit test no longer relies on
9916 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9917 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9918 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9920 o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
9921 - Stop sending ed25519 link specifiers in v3 onion service introduce
9922 cells and descriptors, when the rendezvous or introduction point
9923 doesn't support ed25519 link authentication. Fixes bug 26627;
9924 bugfix on 0.3.2.4-alpha.
9926 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9927 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9928 27185; bugfix on 0.2.2.2-alpha.
9931 Changes in version 0.3.4.8 - 2018-09-10
9932 Tor 0.3.4.8 is the first stable release in its series; it includes
9933 compilation and portability fixes.
9935 The Tor 0.3.4 series includes improvements for running Tor in
9936 low-power and embedded environments, which should help performance in
9937 general. We've begun work on better modularity, and included preliminary
9938 changes on the directory authority side to accommodate a new bandwidth
9939 measurement system. We've also integrated more continuous-integration
9940 systems into our development process, and made corresponding changes to
9941 Tor's testing infrastructure. Finally, we've continued to refine
9942 our anti-denial-of-service code.
9944 Below are the changes since 0.3.4.7-rc. For a complete list of changes
9945 since 0.3.3.9, see the ReleaseNotes file.
9947 o Minor features (compatibility):
9948 - Tell OpenSSL to maintain backward compatibility with previous
9949 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9950 ciphers are disabled by default. Closes ticket 27344.
9952 o Minor features (continuous integration):
9953 - Log the compiler path and version during Appveyor builds.
9954 Implements ticket 27449.
9955 - Show config.log and test-suite.log after failed Appveyor builds.
9956 Also upload the zipped full logs as a build artifact. Implements
9959 o Minor bugfixes (compilation):
9960 - Silence a spurious compiler warning on the GetAdaptersAddresses
9961 function pointer cast. This issue is already fixed by 26481 in
9962 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9963 bugfix on 0.2.3.11-alpha.
9964 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9965 supported, and always fails. Some compilers warn about the
9966 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9969 o Minor bugfixes (continuous integration):
9970 - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
9971 August 29 2018, Appveyor images come with gcc 8.2.0 by default.
9972 Executables compiled for 64-bit Windows with this version of gcc
9973 crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
9974 27460; bugfix on 0.3.4.1-alpha.
9975 - When a Travis build fails, and showing a log fails, keep trying to
9976 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9977 - When we use echo in Travis, don't pass a --flag as the first
9978 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9980 o Minor bugfixes (onion services):
9981 - Silence a spurious compiler warning in
9982 rend_client_send_introduction(). Fixes bug 27463; bugfix
9985 o Minor bugfixes (testing, chutney):
9986 - When running make test-network-all, use the mixed+hs-v2 network.
9987 (A previous fix to chutney removed v3 onion services from the
9988 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
9989 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
9990 - Before running make test-network-all, delete old logs and test
9991 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9994 Changes in version 0.3.4.7-rc - 2018-08-24
9995 Tor 0.3.4.7-rc fixes several small compilation, portability, and
9996 correctness issues in previous versions of Tor. This version is a
9997 release candidate: if no serious bugs are found, we expect that the
9998 stable 0.3.4 release will be (almost) the same as this release.
10000 o Minor features (bug workaround):
10001 - Compile correctly on systems that provide the C11 stdatomic.h
10002 header, but where C11 atomic functions don't actually compile.
10003 Closes ticket 26779; workaround for Debian issue 903709.
10005 o Minor features (continuous integration):
10006 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
10007 - Enable macOS builds in our Travis CI configuration. Closes
10009 - Install libcap-dev and libseccomp2-dev so these optional
10010 dependencies get tested on Travis CI. Closes ticket 26560.
10011 - Only post Appveyor IRC notifications when the build fails.
10012 Implements ticket 27275.
10013 - Run asciidoc during Travis CI. Implements ticket 27087.
10014 - Use ccache in our Travis CI configuration. Closes ticket 26952.
10016 o Minor features (continuous integration, rust):
10017 - Use cargo cache in our Travis CI configuration. Closes
10020 o Minor features (directory authorities):
10021 - Authorities no longer vote to make the subprotocol version
10022 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
10023 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
10025 o Minor features (geoip):
10026 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
10027 Country database. Closes ticket 27089.
10029 o Minor bugfixes (compilation, windows):
10030 - Don't link or search for pthreads when building for Windows, even
10031 if we are using build environment (like mingw) that provides a
10032 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
10034 o Minor bugfixes (continuous integration):
10035 - Improve Appveyor CI IRC logging. Generate correct branches and
10036 URLs for pull requests and tags. Use unambiguous short commits.
10037 Fixes bug 26979; bugfix on master.
10038 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
10039 - Pass the module flags to distcheck configure, and log the flags
10040 before running configure. (Backported to 0.2.9 and later as a
10041 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
10043 o Minor bugfixes (in-process restart):
10044 - Always call tor_free_all() when leaving tor_run_main(). When we
10045 did not, restarting tor in-process would cause an assertion
10046 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
10048 o Minor bugfixes (linux seccomp2 sandbox):
10049 - Fix a bug in out sandboxing rules for the openat() syscall.
10050 Previously, no openat() call would be permitted, which would break
10051 filesystem operations on recent glibc versions. Fixes bug 25440;
10052 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
10054 o Minor bugfixes (onion services):
10055 - Fix bug that causes services to not ever rotate their descriptors
10056 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
10059 o Minor bugfixes (portability):
10060 - Fix compilation of the unit tests on GNU/Hurd, which does not
10061 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
10064 o Minor bugfixes (rust):
10065 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
10067 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
10068 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
10069 - Protover parsing was accepting the presence of whitespace in
10070 version strings, which the C implementation would choke on, e.g.
10071 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
10072 - Protover parsing was ignoring a 2nd hyphen and everything after
10073 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
10075 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
10076 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
10077 - cd to ${abs_top_builddir}/src/rust before running cargo in
10078 src/test/test_rust.sh. This makes the working directory consistent
10079 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
10081 o Minor bugfixes (testing, bootstrap):
10082 - When calculating bootstrap progress, check exit policies and the
10083 exit flag. Previously, Tor would only check the exit flag, which
10084 caused race conditions in small and fast networks like chutney.
10085 Fixes bug 27236; bugfix on 0.2.6.3-alpha.
10087 o Minor bugfixes (testing, openssl compatibility):
10088 - Our "tortls/cert_matches_key" unit test no longer relies on
10089 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10090 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10091 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10093 o Minor bugfixes (Windows, compilation):
10094 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10095 27185; bugfix on 0.2.2.2-alpha.
10098 Changes in version 0.3.4.6-rc - 2018-08-06
10099 Tor 0.3.4.6-rc fixes several small compilation, portability, and
10100 correctness issues in previous versions of Tor. This version is a
10101 release candidate: if no serious bugs are found, we expect that the
10102 stable 0.3.4 release will be (almost) the same as this release.
10104 o Major bugfixes (event scheduler):
10105 - When we enable a periodic event, schedule it in the event loop
10106 rather than running it immediately. Previously, we would re-run
10107 periodic events immediately in the middle of (for example)
10108 changing our options, with unpredictable effects. Fixes bug 27003;
10109 bugfix on 0.3.4.1-alpha.
10111 o Minor features (compilation):
10112 - When building Tor, prefer to use Python 3 over Python 2, and more
10113 recent (contemplated) versions over older ones. Closes
10115 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
10116 tell the compiler not to include the system malloc implementation.
10117 Fixes bug 20424; bugfix on 0.2.0.20-rc.
10118 - Don't try to use a pragma to temporarily disable the
10119 -Wunused-const-variable warning if the compiler doesn't support
10120 it. Fixes bug 26785; bugfix on 0.3.2.11.
10122 o Minor bugfixes (continuous integration):
10123 - Skip a pair of unreliable key generation tests on Windows, until
10124 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10125 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10127 o Minor features (controller):
10128 - The control port now exposes the list of HTTPTunnelPorts and
10129 ExtOrPorts via GETINFO net/listeners/httptunnel and
10130 net/listeners/extor respectively. Closes ticket 26647.
10132 o Minor bugfixes (directory authority):
10133 - When voting for recommended versions, make sure that all of the
10134 versions are well-formed and parsable. Fixes bug 26485; bugfix
10137 o Minor features (geoip):
10138 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10139 Country database. Closes ticket 26674.
10141 o Minor features (Rust, portability):
10142 - Rust cross-compilation is now supported. Closes ticket 25895.
10144 o Minor bugfixes (compilation):
10145 - Update build system so that tor builds again with --disable-unittests
10146 after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
10147 - Fix a compilation warning on some versions of GCC when building
10148 code that calls routerinfo_get_my_routerinfo() twice, assuming
10149 that the second call will succeed if the first one did. Fixes bug
10150 26269; bugfix on 0.2.8.2-alpha.
10152 o Minor bugfixes (controller):
10153 - Report the port correctly when a port is configured to bind to
10154 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
10155 - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
10156 Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
10157 on 0.3.3.1-alpha. Patch by "akwizgran".
10159 o Minor bugfixes (correctness, flow control):
10160 - Upon receiving a stream-level SENDME cell, verify that our window
10161 has not grown too large. Fixes bug 26214; bugfix on svn
10164 o Minor bugfixes (memory, correctness):
10165 - Fix a number of small memory leaks identified by coverity. Fixes
10166 bug 26467; bugfix on numerous Tor versions.
10168 o Minor bugfixes (logging):
10169 - Improve the log message when connection initiators fail to
10170 authenticate direct connections to relays. Fixes bug 26927; bugfix
10173 o Minor bugfixes (portability):
10174 - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
10175 26994; bugfix on 0.3.4.1-alpha.
10176 - Work around two different bugs in the OS X 10.10 and later SDKs
10177 that would prevent us from successfully targeting earlier versions
10178 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
10180 o Minor bugfixes (single onion services, Tor2web):
10181 - Log a protocol warning when single onion services or Tor2web
10182 clients fail to authenticate direct connections to relays. Fixes
10183 bug 26924; bugfix on 0.2.9.1-alpha.
10185 o Minor bugfixes (testing):
10186 - Disable core dumps in test_bt.sh, to avoid failures in "make
10187 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10189 o Minor bugfixes (testing, compatibility):
10190 - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
10191 only to pass strings (rather than "bytes" objects) to the Python
10192 subprocess module. Python 3 on Windows seems to require this.
10193 Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
10194 0.3.1.1-alpha (for hs_ntor_ref.py).
10196 o Minor bugfixes (v3 onion services):
10197 - Stop sending ed25519 link specifiers in v3 onion service introduce
10198 cells and descriptors, when the rendezvous or introduction point
10199 doesn't support ed25519 link authentication. Fixes bug 26627;
10200 bugfix on 0.3.2.4-alpha.
10203 Changes in version 0.3.4.5-rc - 2018-07-13
10204 Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
10205 bridge relays should upgrade.
10207 o Directory authority changes:
10208 - The "Bifroest" bridge authority has been retired; the new bridge
10209 authority is "Serge", and it is operated by George from the
10210 TorBSD project. Closes ticket 26771.
10213 Changes in version 0.3.3.9 - 2018-07-13
10214 Tor 0.3.3.9 moves to a new bridge authority, meaning people running
10215 bridge relays should upgrade.
10217 o Directory authority changes:
10218 - The "Bifroest" bridge authority has been retired; the new bridge
10219 authority is "Serge", and it is operated by George from the
10220 TorBSD project. Closes ticket 26771.
10223 Changes in version 0.3.2.11 - 2018-07-13
10224 Tor 0.3.2.11 moves to a new bridge authority, meaning people running
10225 bridge relays should upgrade. We also take this opportunity to backport
10228 o Directory authority changes:
10229 - The "Bifroest" bridge authority has been retired; the new bridge
10230 authority is "Serge", and it is operated by George from the
10231 TorBSD project. Closes ticket 26771.
10233 o Directory authority changes (backport from 0.3.3.7):
10234 - Add an IPv6 address for the "dannenberg" directory authority.
10235 Closes ticket 26343.
10237 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10238 - When directory authorities read a zero-byte bandwidth file, they
10239 would previously log a warning with the contents of an
10240 uninitialised buffer. They now log a warning about the empty file
10241 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10243 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
10244 - Correctly detect when onion services get disabled after HUP. Fixes
10245 bug 25761; bugfix on 0.3.2.1.
10247 o Minor features (sandbox, backport from 0.3.3.4-alpha):
10248 - Explicitly permit the poll() system call when the Linux
10249 seccomp2-based sandbox is enabled: apparently, some versions of
10250 libc use poll() when calling getpwnam(). Closes ticket 25313.
10252 o Minor feature (continuous integration, backport from 0.3.3.5-rc):
10253 - Update the Travis CI configuration to use the stable Rust channel,
10254 now that we have decided to require that. Closes ticket 25714.
10256 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10257 - Our .travis.yml configuration now includes support for testing the
10258 results of "make distcheck". (It's not uncommon for "make check"
10259 to pass but "make distcheck" to fail.) Closes ticket 25814.
10260 - Our Travis CI configuration now integrates with the Coveralls
10261 coverage analysis tool. Closes ticket 25818.
10263 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
10264 - Add several checks to detect whether Tor relays are uploading
10265 their descriptors without specifying why they regenerated them.
10266 Diagnostic for ticket 25686.
10268 o Minor features (compilation, backport from 0.3.4.4-rc):
10269 - When building Tor, prefer to use Python 3 over Python 2, and more
10270 recent (contemplated) versions over older ones. Closes
10273 o Minor features (geoip):
10274 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10275 Country database. Closes ticket 26674.
10277 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10278 - Upon receiving a malformed connected cell, stop processing the
10279 cell immediately. Previously we would mark the connection for
10280 close, but continue processing the cell as if the connection were
10281 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10283 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10284 - Allow the nanosleep() system call, which glibc uses to implement
10285 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10287 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10288 - When running the hs_ntor_ref.py test, make sure only to pass
10289 strings (rather than "bytes" objects) to the Python subprocess
10290 module. Python 3 on Windows seems to require this. Fixes bug
10291 26535; bugfix on 0.3.1.1-alpha.
10292 - When running the ntor_ref.py test, make sure only to pass strings
10293 (rather than "bytes" objects) to the Python subprocess module.
10294 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10297 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10298 - Work around a change in OpenSSL 1.1.1 where return values that
10299 would previously indicate "no password" now indicate an empty
10300 password. Without this workaround, Tor instances running with
10301 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10302 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10304 o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
10305 - Document that the PerConnBW{Rate,Burst} options will fall back to
10306 their corresponding consensus parameters only if those parameters
10307 are set. Previously we had claimed that these values would always
10308 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
10310 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10311 - Fix a compilation warning on some versions of GCC when building
10312 code that calls routerinfo_get_my_routerinfo() twice, assuming
10313 that the second call will succeed if the first one did. Fixes bug
10314 26269; bugfix on 0.2.8.2-alpha.
10316 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10317 - Don't consider Tor running as a client if the ControlPort is open,
10318 but no actual client ports are open. Fixes bug 26062; bugfix
10321 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10322 - Prevent a possible out-of-bounds smartlist read in
10323 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10325 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
10326 - Fix a very unlikely (impossible, we believe) null pointer
10327 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10328 Coverity; this is CID 1430932.
10330 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
10331 - Fix a memory leak when a v3 onion service is configured and gets a
10332 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
10333 - When parsing the descriptor signature, look for the token plus an
10334 extra white-space at the end. This is more correct but also will
10335 allow us to support new fields that might start with "signature".
10336 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
10338 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
10339 - Relays now correctly block attempts to re-extend to the previous
10340 relay by Ed25519 identity. Previously they would warn in this
10341 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10344 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
10345 - Avoid a crash when running with DirPort set but ORPort turned off.
10346 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
10348 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
10349 - Silence unused-const-variable warnings in zstd.h with some GCC
10350 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10352 o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
10353 - Avoid intermittent test failures due to a test that had relied on
10354 onion service introduction point creation finishing within 5
10355 seconds of real clock time. Fixes bug 25450; bugfix
10358 o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
10359 - Fix a C99 compliance issue in our configuration script that caused
10360 compilation issues when compiling Tor with certain versions of
10361 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
10363 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10364 - Fix a number of small memory leaks identified by coverity. Fixes
10365 bug 26467; bugfix on numerous Tor versions.
10367 o Code simplification and refactoring (backport from 0.3.3.5-rc):
10368 - Move the list of default directory authorities to its own file.
10369 Closes ticket 24854. Patch by "beastr0".
10372 Changes in version 0.2.9.16 - 2018-07-13
10373 Tor 0.2.9.16 moves to a new bridge authority, meaning people running
10374 bridge relays should upgrade. We also take this opportunity to backport
10377 o Directory authority changes:
10378 - The "Bifroest" bridge authority has been retired; the new bridge
10379 authority is "Serge", and it is operated by George from the
10380 TorBSD project. Closes ticket 26771.
10382 o Directory authority changes (backport from 0.3.3.7):
10383 - Add an IPv6 address for the "dannenberg" directory authority.
10384 Closes ticket 26343.
10386 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10387 - When directory authorities read a zero-byte bandwidth file, they
10388 would previously log a warning with the contents of an
10389 uninitialised buffer. They now log a warning about the empty file
10390 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10392 o Minor features (sandbox, backport from 0.3.3.4-alpha):
10393 - Explicitly permit the poll() system call when the Linux
10394 seccomp2-based sandbox is enabled: apparently, some versions of
10395 libc use poll() when calling getpwnam(). Closes ticket 25313.
10397 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10398 - Our .travis.yml configuration now includes support for testing the
10399 results of "make distcheck". (It's not uncommon for "make check"
10400 to pass but "make distcheck" to fail.) Closes ticket 25814.
10401 - Our Travis CI configuration now integrates with the Coveralls
10402 coverage analysis tool. Closes ticket 25818.
10404 o Minor features (compilation, backport from 0.3.4.4-rc):
10405 - When building Tor, prefer to use Python 3 over Python 2, and more
10406 recent (contemplated) versions over older ones. Closes
10409 o Minor features (geoip):
10410 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10411 Country database. Closes ticket 26674.
10413 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10414 - Upon receiving a malformed connected cell, stop processing the
10415 cell immediately. Previously we would mark the connection for
10416 close, but continue processing the cell as if the connection were
10417 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10419 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10420 - Allow the nanosleep() system call, which glibc uses to implement
10421 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10423 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10424 - When running the ntor_ref.py test, make sure only to pass strings
10425 (rather than "bytes" objects) to the Python subprocess module.
10426 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10429 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10430 - Work around a change in OpenSSL 1.1.1 where return values that
10431 would previously indicate "no password" now indicate an empty
10432 password. Without this workaround, Tor instances running with
10433 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10434 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10436 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10437 - Fix a compilation warning on some versions of GCC when building
10438 code that calls routerinfo_get_my_routerinfo() twice, assuming
10439 that the second call will succeed if the first one did. Fixes bug
10440 26269; bugfix on 0.2.8.2-alpha.
10442 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10443 - Don't consider Tor running as a client if the ControlPort is open,
10444 but no actual client ports are open. Fixes bug 26062; bugfix
10447 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10448 - Prevent a possible out-of-bounds smartlist read in
10449 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10451 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
10452 - Fix a very unlikely (impossible, we believe) null pointer
10453 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10454 Coverity; this is CID 1430932.
10456 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10457 - Fix a number of small memory leaks identified by coverity. Fixes
10458 bug 26467; bugfix on numerous Tor versions.
10460 o Code simplification and refactoring (backport from 0.3.3.5-rc):
10461 - Move the list of default directory authorities to its own file.
10462 Closes ticket 24854. Patch by "beastr0".
10465 Changes in version 0.3.4.4-rc - 2018-07-09
10466 Tor 0.3.4.4-rc fixes several small compilation, portability, and
10467 correctness issues in previous versions of Tor. This version is a
10468 release candidate: if no serious bugs are found, we expect that the
10469 stable 0.3.4 release will be (almost) the same as this release.
10471 o Minor features (compilation):
10472 - When building Tor, prefer to use Python 3 over Python 2, and more
10473 recent (contemplated) versions over older ones. Closes
10476 o Minor features (geoip):
10477 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10478 Country database. Closes ticket 26674.
10480 o Minor features (Rust, portability):
10481 - Rust cross-compilation is now supported. Closes ticket 25895.
10483 o Minor bugfixes (compilation):
10484 - Fix a compilation warning on some versions of GCC when building
10485 code that calls routerinfo_get_my_routerinfo() twice, assuming
10486 that the second call will succeed if the first one did. Fixes bug
10487 26269; bugfix on 0.2.8.2-alpha.
10489 o Minor bugfixes (control port):
10490 - Report the port correctly when a port is configured to bind to
10491 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
10492 - Handle the HSADDRESS= argument to the HSPOST command properly.
10493 (Previously, this argument was misparsed and thus ignored.) Fixes
10494 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
10496 o Minor bugfixes (correctness, flow control):
10497 - Upon receiving a stream-level SENDME cell, verify that our window
10498 has not grown too large. Fixes bug 26214; bugfix on svn
10501 o Minor bugfixes (memory, correctness):
10502 - Fix a number of small memory leaks identified by coverity. Fixes
10503 bug 26467; bugfix on numerous Tor versions.
10505 o Minor bugfixes (testing, compatibility):
10506 - When running the hs_ntor_ref.py test, make sure only to pass
10507 strings (rather than "bytes" objects) to the Python subprocess
10508 module. Python 3 on Windows seems to require this. Fixes bug
10509 26535; bugfix on 0.3.1.1-alpha.
10510 - When running the ntor_ref.py test, make sure only to pass strings
10511 (rather than "bytes" objects) to the Python subprocess module.
10512 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10516 Changes in version 0.3.3.8 - 2018-07-09
10517 Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
10518 fixes for a memory leak affecting directory authorities.
10520 o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
10521 - Stop leaking memory on directory authorities when planning to
10522 vote. This bug was crashing authorities by exhausting their
10523 memory. Fixes bug 26435; bugfix on 0.3.3.6.
10525 o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
10526 - Make sure that failing tests in Rust will actually cause the build
10527 to fail: previously, they were ignored. Fixes bug 26258; bugfix
10530 o Minor features (compilation, backport from 0.3.4.4-rc):
10531 - When building Tor, prefer to use Python 3 over Python 2, and more
10532 recent (contemplated) versions over older ones. Closes
10535 o Minor features (geoip):
10536 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10537 Country database. Closes ticket 26674.
10539 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
10540 - Add several checks to detect whether Tor relays are uploading
10541 their descriptors without specifying why they regenerated them.
10542 Diagnostic for ticket 25686.
10544 o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
10545 - Don't count path selection failures as circuit build failures.
10546 This change should eliminate cases where Tor blames its guard or
10547 the network for situations like insufficient microdescriptors
10548 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
10551 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10552 - Fix a compilation warning on some versions of GCC when building
10553 code that calls routerinfo_get_my_routerinfo() twice, assuming
10554 that the second call will succeed if the first one did. Fixes bug
10555 26269; bugfix on 0.2.8.2-alpha.
10557 o Minor bugfixes (control port, backport from 0.3.4.4-rc):
10558 - Handle the HSADDRESS= argument to the HSPOST command properly.
10559 (Previously, this argument was misparsed and thus ignored.) Fixes
10560 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
10562 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10563 - Fix a number of small memory leaks identified by coverity. Fixes
10564 bug 26467; bugfix on numerous Tor versions.
10566 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
10567 - Relays now correctly block attempts to re-extend to the previous
10568 relay by Ed25519 identity. Previously they would warn in this
10569 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10572 o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
10573 - When shutting down, Tor now clears all the flags in the control.c
10574 module. This should prevent a bug where authentication cookies are
10575 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
10577 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10578 - When running the hs_ntor_ref.py test, make sure only to pass
10579 strings (rather than "bytes" objects) to the Python subprocess
10580 module. Python 3 on Windows seems to require this. Fixes bug
10581 26535; bugfix on 0.3.1.1-alpha.
10582 - When running the ntor_ref.py test, make sure only to pass strings
10583 (rather than "bytes" objects) to the Python subprocess module.
10584 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10588 Changes in version 0.3.4.3-alpha - 2018-06-26
10589 Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
10590 one that was causing stability issues on directory authorities.
10592 o Major bugfixes (directory authority):
10593 - Stop leaking memory on directory authorities when planning to
10594 vote. This bug was crashing authorities by exhausting their
10595 memory. Fixes bug 26435; bugfix on 0.3.3.6.
10597 o Major bugfixes (rust, testing):
10598 - Make sure that failing tests in Rust will actually cause the build
10599 to fail: previously, they were ignored. Fixes bug 26258; bugfix
10602 o Minor feature (directory authorities):
10603 - Stop warning about incomplete bw lines before the first complete
10604 bw line has been found, so that additional header lines can be
10605 ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
10607 o Minor features (relay, diagnostic):
10608 - Add several checks to detect whether Tor relays are uploading
10609 their descriptors without specifying why they regenerated them.
10610 Diagnostic for ticket 25686.
10612 o Minor features (unit tests):
10613 - Test complete bandwidth measurements files, and test that
10614 incomplete bandwidth lines only give warnings when the end of the
10615 header has not been detected. Fixes bug 25947; bugfix
10618 o Minor bugfixes (compilation):
10619 - Refrain from compiling unit testing related object files when
10620 --disable-unittests is set to configure script. Fixes bug 24891;
10621 bugfix on 0.2.5.1-alpha.
10622 - When linking the libtor_testing.a library, only include the
10623 dirauth object files once. Previously, they were getting added
10624 twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
10625 - The --enable-fatal-warnings flag now affects Rust code as well.
10626 Closes ticket 26245.
10628 o Minor bugfixes (onion services):
10629 - Recompute some consensus information after detecting a clock jump,
10630 or after transitioning from a non-live consensus to a live
10631 consensus. We do this to avoid having an outdated state, and
10632 miscalculating the index for next-generation onion services. Fixes
10633 bug 24977; bugfix on 0.3.2.1-alpha.
10635 o Minor bugfixes (relay):
10636 - Relays now correctly block attempts to re-extend to the previous
10637 relay by Ed25519 identity. Previously they would warn in this
10638 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10641 o Minor bugfixes (testing):
10642 - Fix compilation of the doctests in the Rust crypto crate. Fixes
10643 bug 26415; bugfix on 0.3.4.1-alpha.
10644 - Instead of trying to read the geoip configuration files from
10645 within the unit tests, instead create our own ersatz files with
10646 just enough geoip data in the format we expect. Trying to read
10647 from the source directory created problems on Windows with mingw,
10648 where the build system's paths are not the same as the platform's
10649 paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
10650 - Refrain from trying to get an item from an empty smartlist in
10651 test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
10652 to catch improper smartlist usage. Furthermore, enable
10653 DEBUG_SMARTLIST globally when build is configured with fragile
10654 hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
10657 Changes in version 0.3.3.7 - 2018-06-12
10658 Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
10659 fixes for bugs affecting compatibility and stability.
10661 o Directory authority changes:
10662 - Add an IPv6 address for the "dannenberg" directory authority.
10663 Closes ticket 26343.
10665 o Minor features (geoip):
10666 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
10667 Country database. Closes ticket 26351.
10669 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10670 - Work around a change in OpenSSL 1.1.1 where return values that
10671 would previously indicate "no password" now indicate an empty
10672 password. Without this workaround, Tor instances running with
10673 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10674 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10676 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
10677 - Silence unused-const-variable warnings in zstd.h with some GCC
10678 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10680 o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
10681 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
10682 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
10683 miscounting the total number of circuits for these field values.)
10684 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
10686 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10687 - Prevent a possible out-of-bounds smartlist read in
10688 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10690 o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
10691 - Only select relays when they have the descriptors we prefer to use
10692 for them. This change fixes a bug where we could select a relay
10693 because it had _some_ descriptor, but reject it later with a
10694 nonfatal assertion error because it didn't have the exact one we
10695 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
10698 Changes in version 0.3.4.2-alpha - 2018-06-12
10699 Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
10700 release, and forward-ports an authority-only security fix from 0.3.3.6.
10702 o Directory authority changes:
10703 - Add an IPv6 address for the "dannenberg" directory authority.
10704 Closes ticket 26343.
10706 o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
10707 - Fix a bug that could have allowed an attacker to force a directory
10708 authority to use up all its RAM by passing it a maliciously
10709 crafted protocol versions string. Fixes bug 25517; bugfix on
10710 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
10712 o Minor features (continuous integration):
10713 - Add the necessary configuration files for continuous integration
10714 testing on Windows, via the Appveyor platform. Closes ticket
10715 25549. Patches from Marcin Cieślak and Isis Lovecruft.
10717 o Minor features (geoip):
10718 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
10719 Country database. Closes ticket 26351.
10721 o Minor bugfixes (compatibility, openssl):
10722 - Work around a change in OpenSSL 1.1.1 where return values that
10723 would previously indicate "no password" now indicate an empty
10724 password. Without this workaround, Tor instances running with
10725 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10726 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10728 o Minor bugfixes (compilation):
10729 - Silence unused-const-variable warnings in zstd.h with some GCC
10730 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10731 - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
10732 flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
10733 - Avoid a compiler warning when casting the return value of
10734 smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
10735 26283; bugfix on 0.2.4.10-alpha.
10737 o Minor bugfixes (control port):
10738 - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
10739 CIRC_BW events. Previously, such cells were counted entirely in
10740 the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
10743 o Minor bugfixes (controller):
10744 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
10745 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
10746 miscounting the total number of circuits for these field values.)
10747 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
10749 o Minor bugfixes (hardening):
10750 - Prevent a possible out-of-bounds smartlist read in
10751 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10753 o Minor bugfixes (onion services):
10754 - Fix a bug that blocked the creation of ephemeral v3 onion
10755 services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
10757 o Minor bugfixes (test coverage tools):
10758 - Update our "cov-diff" script to handle output from the latest
10759 version of gcov, and to remove extraneous timestamp information
10760 from its output. Fixes bugs 26101 and 26102; bugfix
10764 Changes in version 0.3.3.6 - 2018-05-22
10765 Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
10766 backports several important fixes from the 0.3.4.1-alpha.
10768 The Tor 0.3.3 series includes controller support and other
10769 improvements for v3 onion services, official support for embedding Tor
10770 within other applications, and our first non-trivial module written in
10771 the Rust programming language. (Rust is still not enabled by default
10772 when building Tor.) And as usual, there are numerous other smaller
10773 bugfixes, features, and improvements.
10775 Below are the changes since 0.3.3.5-rc. For a list of all changes
10776 since 0.3.2.10, see the ReleaseNotes file.
10778 o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
10779 - When directory authorities read a zero-byte bandwidth file, they
10780 would previously log a warning with the contents of an
10781 uninitialised buffer. They now log a warning about the empty file
10782 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10784 o Major bugfixes (security, directory authority, denial-of-service):
10785 - Fix a bug that could have allowed an attacker to force a directory
10786 authority to use up all its RAM by passing it a maliciously
10787 crafted protocol versions string. Fixes bug 25517; bugfix on
10788 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
10790 o Major bugfixes (crash, backport from 0.3.4.1-alpha):
10791 - Avoid a rare assertion failure in the circuit build timeout code
10792 if we fail to allow any circuits to actually complete. Fixes bug
10793 25733; bugfix on 0.2.2.2-alpha.
10795 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10796 - Avoid a crash when testing router reachability on a router that
10797 could have an ed25519 ID, but which does not. Fixes bug 25415;
10798 bugfix on 0.3.3.2-alpha.
10800 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
10801 - Correctly detect when onion services get disabled after HUP. Fixes
10802 bug 25761; bugfix on 0.3.2.1.
10804 o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
10805 - Impose a limit on circuit cell queue size. The limit can be
10806 controlled by a consensus parameter. Fixes bug 25226; bugfix
10809 o Minor features (compatibility, backport from 0.3.4.1-alpha):
10810 - Avoid some compilation warnings with recent versions of LibreSSL.
10811 Closes ticket 26006.
10813 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10814 - Our .travis.yml configuration now includes support for testing the
10815 results of "make distcheck". (It's not uncommon for "make check"
10816 to pass but "make distcheck" to fail.) Closes ticket 25814.
10817 - Our Travis CI configuration now integrates with the Coveralls
10818 coverage analysis tool. Closes ticket 25818.
10820 o Minor features (geoip):
10821 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
10822 database. Closes ticket 26104.
10824 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10825 - Don't consider Tor running as a client if the ControlPort is open,
10826 but no actual client ports are open. Fixes bug 26062; bugfix
10829 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10830 - Upon receiving a malformed connected cell, stop processing the
10831 cell immediately. Previously we would mark the connection for
10832 close, but continue processing the cell as if the connection were
10833 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10835 o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
10836 - Stop saying in the manual that clients cache ipv4 dns answers from
10837 exit relays. We haven't used them since 0.2.6.3-alpha, and in
10838 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
10839 we forgot to say so in the man page. Fixes bug 26052; bugfix
10842 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10843 - Allow the nanosleep() system call, which glibc uses to implement
10844 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10846 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
10847 - Fix a memory leak when a v3 onion service is configured and gets a
10848 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
10849 - When parsing the descriptor signature, look for the token plus an
10850 extra white-space at the end. This is more correct but also will
10851 allow us to support new fields that might start with "signature".
10852 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
10854 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
10855 - Avoid a crash when running with DirPort set but ORPort turned off.
10856 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
10858 o Documentation (backport from 0.3.4.1-alpha):
10859 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
10860 ticket 25857. Patch from "CTassisF".
10863 Changes in version 0.3.4.1-alpha - 2018-05-17
10864 Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
10865 includes refactoring to begin reducing Tor's binary size and idle CPU
10866 usage on mobile, along with prep work for new bandwidth scanners,
10867 improvements to the experimental "vanguards" feature, and numerous
10868 other small features and bugfixes.
10870 o New system requirements:
10871 - Tor no longer tries to support old operating systems without
10872 mmap() or some local equivalent. Apparently, compilation on such
10873 systems has been broken for some time, without anybody noticing or
10874 complaining. Closes ticket 25398.
10876 o Major feature (directory authority, modularization):
10877 - The directory authority subsystem has been modularized. The code
10878 is now located in src/or/dirauth/, and is compiled in by default.
10879 To disable the module, the configure option
10880 --disable-module-dirauth has been added. This module may be
10881 disabled by default in some future release. Closes ticket 25610.
10883 o Major features (main loop, CPU usage):
10884 - When Tor is disabled (via DisableNetwork or via hibernation), it
10885 no longer needs to run any per-second events. This change should
10886 make it easier for mobile applications to disable Tor while the
10887 device is sleeping, or Tor is not running. Closes ticket 26063.
10888 - Tor no longer enables all of its periodic events by default.
10889 Previously, Tor would enable all possible main loop events,
10890 regardless of whether it needed them. Furthermore, many of these
10891 events are now disabled with Tor is hibernating or DisableNetwork
10892 is set. This is a big step towards reducing client CPU usage by
10893 reducing the amount of wake-ups the daemon does. Closes ticket
10895 - The bandwidth-limitation logic has been refactored so that
10896 bandwidth calculations are performed on-demand, rather than every
10897 TokenBucketRefillInterval milliseconds. This change should improve
10898 the granularity of our bandwidth calculations, and limit the
10899 number of times that the Tor process needs to wake up when it is
10900 idle. Closes ticket 25373.
10901 - Move responsibility for many operations from a once-per-second
10902 callback to a callback that is only scheduled as needed. Moving
10903 this functionality has allowed us to disable the callback when
10904 Tor's network is disabled. Once enough items are removed from our
10905 once-per-second callback, we can eliminate it entirely to conserve
10906 CPU when idle. The functionality removed includes: closing
10907 connections, circuits, and channels (ticket 25932); consensus
10908 voting (25937); flushing log callbacks (25951); honoring delayed
10909 SIGNEWNYM requests (25949); rescanning the consensus cache
10910 (25931); saving the state file to disk (25948); warning relay
10911 operators about unreachable ports (25952); and keeping track of
10912 Tor's uptime (26009).
10914 o Major bugfixes (directory authorities, security):
10915 - When directory authorities read a zero-byte bandwidth file, they
10916 would previously log a warning with the contents of an
10917 uninitialised buffer. They now log a warning about the empty file
10918 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10920 o Major bugfixes (crash):
10921 - Avoid a rare assertion failure in the circuit build timeout code
10922 if we fail to allow any circuits to actually complete. Fixes bug
10923 25733; bugfix on 0.2.2.2-alpha.
10925 o Major bugfixes (directory authority):
10926 - Avoid a crash when testing router reachability on a router that
10927 could have an ed25519 ID, but which does not. Fixes bug 25415;
10928 bugfix on 0.3.3.2-alpha.
10930 o Major bugfixes (onion service):
10931 - Correctly detect when onion services get disabled after HUP. Fixes
10932 bug 25761; bugfix on 0.3.2.1.
10934 o Major bugfixes (protover, voting):
10935 - Revise Rust implementation of protover to use a more memory-
10936 efficient voting algorithm and corresponding data structures, thus
10937 avoiding a potential (but small impact) DoS attack where specially
10938 crafted protocol strings would expand to several potential
10939 megabytes in memory. In the process, several portions of code were
10940 revised to be methods on new, custom types, rather than functions
10941 taking interchangeable types, thus increasing type safety of the
10942 module. Custom error types and handling were added as well, in
10943 order to facilitate better error dismissal/handling in outside
10944 crates and avoid mistakenly passing an internal error string to C
10945 over the FFI boundary. Many tests were added, and some previous
10946 differences between the C and Rust implementations have been
10947 remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
10949 o Major bugfixes (relay, denial of service):
10950 - Impose a limit on circuit cell queue size. The limit can be
10951 controlled by a consensus parameter. Fixes bug 25226; bugfix
10954 o Minor features (accounting):
10955 - When Tor becomes dormant, it now uses a scheduled event to wake up
10956 at the right time. Previously, we would use the per-second timer
10957 to check whether to wake up, but we no longer have any per-second
10958 timers enabled when the network is disabled. Closes ticket 26064.
10960 o Minor features (code quality):
10961 - Add optional spell-checking for the Tor codebase, using the
10962 "misspell" program. To use this feature, run "make check-typos".
10963 Closes ticket 25024.
10965 o Minor features (compatibility):
10966 - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
10967 the no-deprecated option, and builds correctly with them. Closes
10968 tickets 19429, 19981, and 25353.
10969 - Avoid some compilation warnings with recent versions of LibreSSL.
10970 Closes ticket 26006.
10972 o Minor features (compression, zstd):
10973 - When running with zstd, Tor now considers using advanced functions
10974 that the zstd maintainers have labeled as potentially unstable. To
10975 prevent breakage, Tor will only use this functionality when the
10976 runtime version of the zstd library matches the version with which
10977 Tor was compiled. Closes ticket 25162.
10979 o Minor features (configuration):
10980 - The "DownloadSchedule" options have been renamed to end with
10981 "DownloadInitialDelay". The old names are still allowed, but will
10982 produce a warning. Comma-separated lists are still permitted for
10983 these options, but all values after the first are ignored (as they
10984 have been since 0.2.9). Closes ticket 23354.
10986 o Minor features (continuous integration):
10987 - Our .travis.yml configuration now includes support for testing the
10988 results of "make distcheck". (It's not uncommon for "make check"
10989 to pass but "make distcheck" to fail.) Closes ticket 25814.
10990 - Our Travis CI configuration now integrates with the Coveralls
10991 coverage analysis tool. Closes ticket 25818.
10993 o Minor features (control port):
10994 - Introduce GETINFO "current-time/{local,utc}" to return the local
10995 and UTC times respectively in ISO format. This helps a controller
10996 like Tor Browser detect a time-related error. Closes ticket 25511.
10997 Patch by Neel Chauhan.
10998 - Introduce new fields to the CIRC_BW event. There are two new
10999 fields in each of the read and written directions. The DELIVERED
11000 fields report the total valid data on the circuit, as measured by
11001 the payload sizes of verified and error-checked relay command
11002 cells. The OVERHEAD fields report the total unused bytes in each
11003 of these cells. Closes ticket 25903.
11005 o Minor features (directory authority):
11006 - Directory authorities now open their key-pinning files as O_SYNC,
11007 to limit their chances of accidentally writing partial lines.
11008 Closes ticket 23909.
11010 o Minor features (directory authority, forward compatibility):
11011 - Make the lines of the measured bandwidth file able to contain
11012 their entries in any order. Previously, the node_id entry needed
11013 to come first. Closes ticket 26004.
11015 o Minor features (entry guards):
11016 - Introduce a new torrc option NumPrimaryGuards for controlling the
11017 number of primary guards. Closes ticket 25843.
11019 o Minor features (geoip):
11020 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
11021 database. Closes ticket 26104.
11023 o Minor features (performance):
11024 - Avoid a needless call to malloc() when processing an incoming
11025 relay cell. Closes ticket 24914.
11026 - Make our timing-wheel code run a tiny bit faster on 32-bit
11027 platforms, by preferring 32-bit math to 64-bit. Closes
11029 - Avoid a needless malloc()/free() pair every time we handle an ntor
11030 handshake. Closes ticket 25150.
11032 o Minor features (testing):
11033 - Add a unit test for voting_schedule_get_start_of_next_interval().
11034 Closes ticket 26014, and helps make unit test coverage
11035 more deterministic.
11036 - A new unittests module specifically for testing the functions in
11037 the (new-ish) bridges.c module has been created with new
11038 unittests, raising the code coverage percentages. Closes 25425.
11039 - We now have improved testing for addressmap_get_virtual_address()
11040 function. This should improve our test coverage, and make our test
11041 coverage more deterministic. Closes ticket 25993.
11043 o Minor features (timekeeping, circuit scheduling):
11044 - When keeping track of how busy each circuit have been recently on
11045 a given connection, use coarse-grained monotonic timers rather
11046 than gettimeofday(). This change should marginally increase
11047 accuracy and performance. Implements part of ticket 25927.
11049 o Minor bugfixes (bandwidth management):
11050 - Consider ourselves "low on write bandwidth" if we have exhausted
11051 our write bandwidth some time in the last second. This was the
11052 documented behavior before, but the actual behavior was to change
11053 this value every TokenBucketRefillInterval. Fixes bug 25828;
11054 bugfix on 0.2.3.5-alpha.
11056 o Minor bugfixes (C correctness):
11057 - Add a missing lock acquisition in the shutdown code of the control
11058 subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
11059 Coverity; this is CID 1433643.
11061 o Minor bugfixes (circuit path selection):
11062 - Don't count path selection failures as circuit build failures.
11063 This change should eliminate cases where Tor blames its guard or
11064 the network for situations like insufficient microdescriptors
11065 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
11068 o Minor bugfixes (client):
11069 - Don't consider Tor running as a client if the ControlPort is open,
11070 but no actual client ports are open. Fixes bug 26062; bugfix
11073 o Minor bugfixes (code style):
11074 - Fixed multiple includes of transports.h in src/or/connection.c
11075 Fixes bug 25261; bugfix on 0.2.5.1-alpha.
11076 - Remove the unused variable n_possible from the function
11077 channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
11079 o Minor bugfixes (control interface):
11080 - Respond with more human-readable error messages to GETINFO exit-
11081 policy/* requests. Also, let controller know if an error is
11082 transient (response code 551) or not (response code 552). Fixes
11083 bug 25852; bugfix on 0.2.8.1-alpha.
11085 o Minor bugfixes (controller):
11086 - Make CIRC_BW event reflect the total of all data sent on a
11087 circuit, including padding and dropped cells. Also fix a mis-
11088 counting bug when STREAM_BW events were enabled. Fixes bug 25400;
11089 bugfix on 0.2.5.2-alpha.
11091 o Minor bugfixes (correctness, client):
11092 - Upon receiving a malformed connected cell, stop processing the cell
11093 immediately. Previously we would mark the connection for close, but
11094 continue processing the cell as if the connection were open. Fixes bug
11095 26072; bugfix on 0.2.4.7-alpha.
11097 o Minor bugfixes (directory client):
11098 - When unverified-consensus is verified, rename it to cached-
11099 consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
11100 - Fixed launching a certificate fetch always during the scheduled
11101 periodic consensus fetch by fetching only in those cases when
11102 consensus are waiting for certs. Fixes bug 24740; bugfix
11105 o Minor bugfixes (documentation):
11106 - Stop saying in the manual that clients cache ipv4 dns answers from
11107 exit relays. We haven't used them since 0.2.6.3-alpha, and in
11108 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
11109 we forgot to say so in the man page. Fixes bug 26052; bugfix
11112 o Minor bugfixes (error reporting):
11113 - Improve tolerance for directory authorities with skewed clocks.
11114 Previously, an authority with a clock more than 60 seconds ahead
11115 could cause a client with a correct clock to warn that the
11116 client's clock was behind. Now the clocks of a majority of
11117 directory authorities have to be ahead of the client before this
11118 warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
11120 o Minor bugfixes (Linux seccomp2 sandbox):
11121 - Allow the nanosleep() system call, which glibc uses to implement
11122 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
11124 o Minor bugfixes (onion service):
11125 - Fix a memory leak when a v3 onion service is configured and gets a
11126 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
11127 - When parsing the descriptor signature, look for the token plus an
11128 extra white-space at the end. This is more correct but also will
11129 allow us to support new fields that might start with "signature".
11130 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
11132 o Minor bugfixes (path selection):
11133 - Only select relays when they have the descriptors we prefer to use
11134 for them. This change fixes a bug where we could select a relay
11135 because it had _some_ descriptor, but reject it later with a
11136 nonfatal assertion error because it didn't have the exact one we
11137 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
11139 o Minor bugfixes (portability):
11140 - Do not align mmap length, as it is not required by POSIX, and the
11141 getpagesize function is deprecated. Fixes bug 25399; bugfix
11144 o Minor bugfixes (portability, FreeBSD):
11145 - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
11146 does not stringify on FreeBSD, so we switch to tor_asprintf().
11147 Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
11149 o Minor bugfixes (relay statistics):
11150 - When a relay is collecting internal statistics about how many
11151 create cell requests it has seen of each type, accurately count
11152 the requests from relays that temporarily fall out of the
11153 consensus. (To be extra conservative, we were already ignoring
11154 requests from clients in our counts, and we continue ignoring them
11155 here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
11157 o Minor bugfixes (relay, crash):
11158 - Avoid a crash when running with DirPort set but ORPort turned off.
11159 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
11161 o Minor bugfixes (restart-in-process):
11162 - When shutting down, Tor now clears all the flags in the control.c
11163 module. This should prevent a bug where authentication cookies are
11164 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
11166 o Minor bugfixes (testing):
11167 - When testing workqueue event-cancellation, make sure that we
11168 actually cancel an event, and that cancel each event with equal
11169 probability. (It was previously possible, though extremely
11170 unlikely, for our event-canceling test not to cancel any events.)
11171 Fixes bug 26008; bugfix on 0.2.6.3-alpha.
11172 - Repeat part of the test in test_client_pick_intro() a number of
11173 times, to give it consistent coverage. Fixes bug 25996; bugfix
11175 - Remove randomness from the hs_common/responsible_hsdirs test, so
11176 that it always takes the same path through the function it tests.
11177 Fixes bug 25997; bugfix on 0.3.2.1-alpha.
11178 - Change the behavior of the "channel/outbound" test so that it
11179 never causes a 10-second rollover for the EWMA circuitmux code.
11180 Previously, this behavior would happen randomly, and result in
11181 fluctuating test coverage. Fixes bug 25994; bugfix
11183 - Use X509_new() to allocate certificates that will be freed later
11184 with X509_free(). Previously, some parts of the unit tests had
11185 used tor_malloc_zero(), which is incorrect, and which caused test
11186 failures on Windows when they were built with extra hardening.
11187 Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
11189 - While running the circuit_timeout test, fix the PRNG to a
11190 deterministic AES stream, so that the test coverage from this test
11191 will itself be deterministic. Fixes bug 25995; bugfix
11194 o Minor bugfixes (vanguards):
11195 - Allow the last hop in a vanguard circuit to be the same as our
11196 first, to prevent the adversary from influencing guard node choice
11197 by choice of last hop. Also prevent the creation of A - B - A
11198 paths, or A - A paths, which are forbidden by relays. Fixes bug
11199 25870; bugfix on 0.3.3.1-alpha.
11201 o Code simplification and refactoring:
11202 - Remove duplicate code in parse_{c,s}method_line and bootstrap
11203 their functionalities into a single function. Fixes bug 6236;
11204 bugfix on 0.2.3.6-alpha.
11205 - We remove the PortForwarding and PortForwardingHelper options,
11206 related functions, and the port_forwarding tests. These options
11207 were used by the now-deprecated Vidalia to help ordinary users
11208 become Tor relays or bridges. Closes ticket 25409. Patch by
11210 - In order to make the OR and dir checking function in router.c less
11211 confusing we renamed some functions and
11212 consider_testing_reachability() has been split into
11213 router_should_check_reachability() and
11214 router_do_reachability_checks(). Also we improved the documentation
11215 in some functions. Closes ticket 18918.
11216 - Initial work to isolate Libevent usage to a handful of modules in
11217 our codebase, to simplify our call structure, and so that we can
11218 more easily change event loops in the future if needed. Closes
11220 - Introduce a function to call getsockname() and return tor_addr_t,
11221 to save a little complexity throughout the codebase. Closes
11223 - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
11224 as hsdir_index is always present. Also, we move hsdir_index_t into
11225 or.h. Closes ticket 23094. Patch by Neel Chauhan.
11226 - Merge functions used for describing nodes and suppress the
11227 functions that do not allocate memory for the output buffer
11228 string. NODE_DESC_BUF_LEN constant and format_node_description()
11229 function cannot be used externally from router.c module anymore.
11230 Closes ticket 25432. Patch by valentecaio.
11231 - Our main loop has been simplified so that all important operations
11232 happen inside events. Previously, some operations had to happen
11233 outside the event loop, to prevent infinite sequences of event
11234 activations. Closes ticket 25374.
11235 - Put a SHA1 public key digest in hs_service_intro_point_t, and use
11236 it in register_intro_circ() and service_intro_point_new(). This
11237 prevents the digest from being re-calculated each time. Closes
11238 ticket 23107. Patch by Neel Chauhan.
11239 - Refactor token-bucket implementations to use a common backend.
11240 Closes ticket 25766.
11241 - Remove extern declaration of stats_n_seconds_working variable from
11242 main, protecting its accesses with get_uptime() and reset_uptime()
11243 functions. Closes ticket 25081, patch by “valentecaio”.
11244 - Remove our previous logic for "cached gettimeofday()" -- our
11245 coarse monotonic timers are fast enough for this purpose, and far
11246 less error-prone. Implements part of ticket 25927.
11247 - Remove the return value for fascist_firewall_choose_address_base(),
11248 and sister functions such as fascist_firewall_choose_address_node()
11249 and fascist_firewall_choose_address_rs(). Also, while we're here,
11250 initialize the ap argument as leaving it uninitialized can pose a
11251 security hazard. Closes ticket 24734. Patch by Neel Chauhan.
11252 - Rename two fields of connection_t struct. timestamp_lastwritten is
11253 renamed to timestamp_last_write_allowed and timestamp_lastread is
11254 renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
11256 - Since Tor requires C99, remove our old workaround code for libc
11257 implementations where free(NULL) doesn't work. Closes ticket 24484.
11258 - Use our standard rate-limiting code to deal with excessive
11259 libevent failures, rather than the hand-rolled logic we had
11260 before. Closes ticket 26016.
11261 - We remove the return value of node_get_prim_orport() and
11262 node_get_prim_dirport(), and introduce node_get_prim_orport() in
11263 node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
11264 check for a null address. Closes ticket 23873. Patch by
11266 - We switch to should_record_bridge_info() in
11267 geoip_note_client_seen() and options_need_geoip_info() instead of
11268 accessing the configuration values directly. Fixes bug 25290;
11269 bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
11271 o Deprecated features:
11272 - As we are not recommending 0.2.5 anymore, we require relays that
11273 once had an ed25519 key associated with their RSA key to always
11274 have that key, instead of allowing them to drop back to a version
11275 that didn't support ed25519. This means they need to use a new RSA
11276 key if they want to downgrade to an older version of tor without
11277 ed25519. Closes ticket 20522.
11280 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
11281 ticket 25857. Patch from "CTassisF".
11283 o Removed features:
11284 - Directory authorities will no longer support voting according to
11285 any consensus method before consensus method 25. This keeps
11286 authorities compatible with all authorities running 0.2.9.8 and
11287 later, and does not break any clients or relays. Implements ticket
11288 24378 and proposal 290.
11289 - The PortForwarding and PortForwardingHelper features have been
11290 removed. The reasoning is, given that implementations of NAT
11291 traversal protocols within common consumer grade routers are
11292 frequently buggy, and that the target audience for a NAT punching
11293 feature is a perhaps less-technically-inclined relay operator,
11294 when the helper fails to setup traversal the problems are usually
11295 deep, ugly, and very router specific, making them horrendously
11296 impossible for technical support to reliable assist with, and thus
11297 resulting in frustration all around. Unfortunately, relay
11298 operators who would like to run relays behind NATs will need to
11299 become more familiar with the port forwarding configurations on
11300 their local router. Closes 25409.
11301 - The TestingEnableTbEmptyEvent option has been removed. It was used
11302 in testing simulations to measure how often connection buckets
11303 were emptied, in order to improve our scheduling, but it has not
11304 been actively used in years. Closes ticket 25760.
11305 - The old "round-robin" circuit multiplexer (circuitmux)
11306 implementation has been removed, along with a fairly large set of
11307 code that existed to support it. It has not been the default
11308 circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
11309 but it still required an unreasonable amount of memory and CPU.
11310 Closes ticket 25268.
11313 Changes in version 0.3.3.5-rc - 2018-04-15
11314 Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
11315 including some that could affect reliability or correctness.
11317 This is the first release candidate in the 0.3.3 series. If we find no
11318 new bugs or regression here, then the first stable 0.3.3 release will
11319 be nearly identical to this one.
11321 o Major bugfixes (security, protover, voting):
11322 - Revise Rust implementation of protover to use a more memory-
11323 efficient voting algorithm and corresponding data structures, thus
11324 avoiding a potential memory-based DoS attack where specially
11325 crafted protocol strings would expand to fill available memory.
11326 Fixes bug 24031; bugfix on 0.3.3.1-alpha.
11328 o Major bugfixes (performance, load balancing):
11329 - Directory authorities no longer vote in favor of the Guard flag
11330 for relays without directory support. Starting in Tor
11331 0.3.0.1-alpha, clients have been avoiding using such relays in the
11332 Guard position, leading to increasingly broken load balancing for
11333 the 5%-or-so of Guards that don't advertise directory support.
11334 Fixes bug 22310; bugfix on 0.3.0.6.
11336 o Minor feature (continuous integration):
11337 - Update the Travis CI configuration to use the stable Rust channel,
11338 now that we have decided to require that. Closes ticket 25714.
11340 o Minor features (config options):
11341 - Change the way the default value for MaxMemInQueues is calculated.
11342 We now use 40% of the hardware RAM if the system has 8 GB RAM or
11343 more. Otherwise we use the former value of 75%. Closes
11346 o Minor features (geoip):
11347 - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
11348 Country database. Closes ticket 25718.
11350 o Minor bugfixes (client):
11351 - When using a listed relay as a bridge, and also using
11352 microdescriptors, and considering that relay as a non-bridge in a
11353 circuit, treat its microdescriptor as a valid source of
11354 information about that relay. This change should prevent a non-
11355 fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
11357 o Minor bugfixes (controller):
11358 - Restore the correct operation of the RESOLVE command, which had
11359 been broken since we added the ability to enable/disable DNS on
11360 specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
11362 o Minor bugfixes (distribution, compilation, rust):
11363 - Build correctly when the rust dependencies submodule is loaded,
11364 but the TOR_RUST_DEPENDENCIES environment variable is not set.
11365 Fixes bug 25679; bugfix on 0.3.3.1-alpha.
11366 - Actually include all of our Rust source in our source
11367 distributions. (Previously, a few of the files were accidentally
11368 omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
11370 o Minor bugfixes (documentation):
11371 - Document that the PerConnBW{Rate,Burst} options will fall back to
11372 their corresponding consensus parameters only if those parameters
11373 are set. Previously we had claimed that these values would always
11374 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
11375 - Revert a misformatting issue in the ExitPolicy documentation.
11376 Fixes bug 25582; bugfix on 0.3.3.1-alpha.
11378 o Minor bugfixes (exit relay DNS retries):
11379 - Re-attempt timed-out DNS queries 3 times before failure, since our
11380 timeout is 5 seconds for them, but clients wait 10-15. Also allow
11381 slightly more timeouts per resolver when an exit has multiple
11382 resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
11384 o Minor bugfixes (onion services):
11385 - Re-instate counting the client HSDir fetch circuits against the
11386 MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
11388 - Remove underscores from the _HSLayer{2,3}Nodes options. This
11389 expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
11390 Fixes bug 25581; bugfix on 0.3.3.1-alpha
11392 o Code simplification and refactoring:
11393 - Move the list of default directory authorities to its own file.
11394 Closes ticket 24854. Patch by "beastr0".
11396 o Documentation (manpage, denial of service):
11397 - Provide more detail about the denial-of-service options, by
11398 listing each mitigation and explaining how they relate. Closes
11402 Changes in version 0.3.3.4-alpha - 2018-03-29
11403 Tor 0.3.3.4-alpha includes various bugfixes for issues found during
11404 the alpha testing of earlier releases in its series. We are
11405 approaching a stable 0.3.3.4-alpha release: more testing is welcome!
11407 o New system requirements:
11408 - When built with Rust, Tor now depends on version 0.2.39 of the
11409 libc crate. Closes tickets 25310 and 25664.
11411 o Major bugfixes (relay, connection):
11412 - If we have failed to connect to a relay and received a connection
11413 refused, timeout, or similar error (at the TCP level), do not try
11414 that same address/port again for 60 seconds after the failure has
11415 occurred. Fixes bug 24767; bugfix on 0.0.6.
11417 o Minor features (geoip):
11418 - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
11419 Country database. Closes ticket 25469.
11421 o Minor features (log messages):
11422 - Improve log message in the out-of-memory handler to include
11423 information about memory usage from the different compression
11424 backends. Closes ticket 25372.
11426 o Minor features (sandbox):
11427 - Explicitly permit the poll() system call when the Linux
11428 seccomp2-based sandbox is enabled: apparently, some versions of
11429 libc use poll() when calling getpwnam(). Closes ticket 25313.
11431 o Minor bugfixes (C correctness):
11432 - Fix a very unlikely (impossible, we believe) null pointer
11433 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
11434 Coverity; this is CID 1430932.
11436 o Minor bugfixes (channel, client):
11437 - Better identify client connection when reporting to the geoip
11438 client cache. Fixes bug 24904; bugfix on 0.3.1.7.
11440 o Minor bugfixes (compilation):
11441 - Fix a C99 compliance issue in our configuration script that caused
11442 compilation issues when compiling Tor with certain versions of
11443 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
11445 o Minor bugfixes (controller, reliability):
11446 - Avoid a (nonfatal) assertion failure when extending a one-hop
11447 circuit from the controller to become a multihop circuit. Fixes
11448 bug 24903; bugfix on 0.2.5.2-alpha.
11450 o Major bugfixes (networking):
11451 - Tor will no longer reject IPv6 address strings from Tor Browser
11452 when they are passed as hostnames in SOCKS5 requests. Fixes bug
11453 25036, bugfix on Tor 0.3.1.2.
11455 o Minor bugfixes (networking):
11456 - string_is_valid_hostname() will not consider IP strings to be
11457 valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
11459 o Minor bugfixes (onion service v3):
11460 - Avoid an assertion failure when the next onion service
11461 descriptor rotation type is out of sync with the consensus's
11462 valid-after time. Instead, log a warning message with extra
11463 information, so we can better hunt down the cause of this
11464 assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
11466 o Minor bugfixes (testing):
11467 - Avoid intermittent test failures due to a test that had relied on
11468 onion service introduction point creation finishing within 5
11469 seconds of real clock time. Fixes bug 25450; bugfix
11471 - Rust crates are now automatically detected and tested. Previously,
11472 some crates were not tested by `make test-rust` due to a static
11473 string in the `src/test/test_rust.sh` script specifying which
11474 crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
11476 o Minor bugfixes (testing, benchmarks):
11477 - Fix a crash when running benchmark tests on win32 systems. The
11478 crash was due to a mutex that wasn't initialized before logging
11479 and options were initialized. Fixes bug 25479; bugfix
11482 o Minor bugfixes (warnings, ipv6):
11483 - Avoid a bug warning that could occur when trying to connect to a
11484 relay over IPv6. This warning would occur on a Tor instance that
11485 downloads router descriptors, but prefers to use microdescriptors.
11486 Fixes bug 25213; bugfix on 0.3.3.1-alpha.
11488 o Code simplification and refactoring:
11489 - Remove the old (deterministic) directory retry logic entirely:
11490 We've used exponential backoff exclusively for some time. Closes
11494 - Improved the documentation of AccountingStart parameter. Closes
11496 - Update the documentation for "Log" to include the current list of
11497 logging domains. Closes ticket 25378.
11500 Changes in version 0.3.1.10 - 2018-03-03
11501 Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
11504 It includes an important security fix for a remote crash attack
11505 against directory authorities, tracked as TROVE-2018-001.
11507 This release also backports our new system for improved resistance to
11508 denial-of-service attacks against relays.
11510 This release also fixes several minor bugs and annoyances from
11513 All directory authorities should upgrade to one of the versions
11514 released today. Relays running 0.3.1.x may wish to update to one of
11515 the versions released today, for the DoS mitigations.
11517 Please note: according to our release calendar, Tor 0.3.1 will no
11518 longer be supported after 1 July 2018. If you will be running Tor
11519 after that date, you should make sure to plan to upgrade to the latest
11520 stable version, or downgrade to 0.2.9 (which will receive long-term
11523 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11524 - Fix a protocol-list handling bug that could be used to remotely crash
11525 directory authorities with a null-pointer exception. Fixes bug 25074;
11526 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11529 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
11530 - Give relays some defenses against the recent network overload. We
11531 start with three defenses (default parameters in parentheses).
11532 First: if a single client address makes too many concurrent
11533 connections (>100), hang up on further connections. Second: if a
11534 single client address makes circuits too quickly (more than 3 per
11535 second, with an allowed burst of 90) while also having too many
11536 connections open (3), refuse new create cells for the next while
11537 (1-2 hours). Third: if a client asks to establish a rendezvous
11538 point to you directly, ignore the request. These defenses can be
11539 manually controlled by new torrc options, but relays will also
11540 take guidance from consensus parameters, so there's no need to
11541 configure anything manually. Implements ticket 24902.
11543 o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
11544 - Update the sandbox rules so that they should now work correctly
11545 with Glibc 2.26. Closes ticket 24315.
11547 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
11548 - Fix an "off by 2" error in counting rendezvous failures on the
11549 onion service side. While we thought we would stop the rendezvous
11550 attempt after one failed circuit, we were actually making three
11551 circuit attempts before giving up. Now switch to a default of 2,
11552 and allow the consensus parameter "hs_service_max_rdv_failures" to
11553 override. Fixes bug 24895; bugfix on 0.0.6.
11555 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
11556 - Add Link protocol version 5 to the supported protocols list. Fixes
11557 bug 25070; bugfix on 0.3.1.1-alpha.
11559 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
11560 - Fix a set of false positives where relays would consider
11561 connections to other relays as being client-only connections (and
11562 thus e.g. deserving different link padding schemes) if those
11563 relays fell out of the consensus briefly. Now we look only at the
11564 initial handshake and whether the connection authenticated as a
11565 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
11567 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
11568 - Make our OOM handler aware of the geoip client history cache so it
11569 doesn't fill up the memory. This check is important for IPv6 and
11570 our DoS mitigation subsystem. Closes ticket 25122.
11572 o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
11573 - Change relay bandwidth reporting stats interval from 4 hours to 24
11574 hours in order to reduce the efficiency of guard discovery
11575 attacks. Fixes ticket 23856.
11577 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
11578 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11579 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11580 since they neither disabled TLS 1.3 nor enabled any of the
11581 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11582 Closes ticket 24978.
11584 o Minor features (fallback directory mirrors, backport from 0.3.2.9):
11585 - The fallback directory list has been re-generated based on the
11586 current status of the network. Tor uses fallback directories to
11587 bootstrap when it doesn't yet have up-to-date directory
11588 information. Closes ticket 24801.
11589 - Make the default DirAuthorityFallbackRate 0.1, so that clients
11590 prefer to bootstrap from fallback directory mirrors. This is a
11591 follow-up to 24679, which removed weights from the default
11592 fallbacks. Implements ticket 24681.
11594 o Minor features (geoip):
11595 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11598 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
11599 - Use the actual observed address of an incoming relay connection,
11600 not the canonical address of the relay from its descriptor, when
11601 making decisions about how to handle the incoming connection.
11602 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11604 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
11605 - Directory authorities, when refusing a descriptor from a rejected
11606 relay, now explicitly tell the relay (in its logs) to set a valid
11607 ContactInfo address and contact the bad-relays@ mailing list.
11608 Fixes bug 25170; bugfix on 0.2.9.1.
11610 o Minor bugfixes (address selection, backport from 0.3.2.9):
11611 - When the fascist_firewall_choose_address_ functions don't find a
11612 reachable address, set the returned address to the null address
11613 and port. This is a precautionary measure, because some callers do
11614 not check the return value. Fixes bug 24736; bugfix
11617 o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
11618 - Fetch descriptors aggressively whenever we lack enough to build
11619 circuits, regardless of how many descriptors we are missing.
11620 Previously, we would delay launching the fetch when we had fewer
11621 than 15 missing descriptors, even if some of those descriptors
11622 were blocking circuits from building. Fixes bug 23985; bugfix on
11623 0.1.1.11-alpha. The effects of this bug became worse in
11624 0.3.0.3-alpha, when we began treating missing descriptors from our
11625 primary guards as a reason to delay circuits.
11626 - Don't try fetching microdescriptors from relays that have failed
11627 to deliver them in the past. Fixes bug 23817; bugfix
11630 o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
11631 - Fix a signed/unsigned comparison warning introduced by our fix to
11632 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
11634 o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
11635 - Avoid a crash when attempting to use the seccomp2 sandbox together
11636 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
11639 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
11640 - Fix a possible crash on malformed consensus. If a consensus had
11641 contained an unparseable protocol line, it could have made clients
11642 and relays crash with a null-pointer exception. To exploit this
11643 issue, however, an attacker would need to be able to subvert the
11644 directory authority system. Fixes bug 25251; bugfix on
11645 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11647 o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
11648 - Recover better from empty or corrupt files in the consensus cache
11649 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
11650 - When a consensus diff calculation is only partially successful,
11651 only record the successful parts as having succeeded. Partial
11652 success can happen if (for example) one compression method fails
11653 but the others succeed. Previously we misrecorded all the
11654 calculations as having succeeded, which would later cause a
11655 nonfatal assertion failure. Fixes bug 24086; bugfix
11658 o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
11659 - Tor now updates its guard state when it reads a consensus
11660 regardless of whether it's missing descriptors. That makes tor use
11661 its primary guards to fetch descriptors in some edge cases where
11662 it would previously have used fallback directories. Fixes bug
11663 23862; bugfix on 0.3.0.1-alpha.
11665 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
11666 - Don't treat inability to store a cached consensus object as a bug:
11667 it can happen normally when we are out of disk space. Fixes bug
11668 24859; bugfix on 0.3.1.1-alpha.
11670 o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
11671 - When queuing DESTROY cells on a channel, only queue the circuit-id
11672 and reason fields: not the entire 514-byte cell. This fix should
11673 help mitigate any bugs or attacks that fill up these queues, and
11674 free more RAM for other uses. Fixes bug 24666; bugfix
11677 o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
11678 - When closing a connection via close_connection_immediately(), we
11679 mark it as "not blocked on bandwidth", to prevent later calls from
11680 trying to unblock it, and give it permission to read. This fixes a
11681 backtrace warning that can happen on relays under various
11682 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
11684 o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
11685 - When selecting relays by bandwidth, avoid a rounding error that
11686 could sometimes cause load to be imbalanced incorrectly.
11687 Previously, we would always round upwards; now, we round towards
11688 the nearest integer. This had the biggest effect when a relay's
11689 weight adjustments should have given it weight 0, but it got
11690 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
11691 - When calculating the fraction of nodes that have descriptors, and
11692 all nodes in the network have zero bandwidths, count the number of
11693 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
11694 - Actually log the total bandwidth in compute_weighted_bandwidths().
11695 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
11697 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
11698 - Improve the performance of our consensus-diff application code
11699 when Tor is built with the --enable-fragile-hardening option set.
11700 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
11702 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
11703 - Don't exit the Tor process if setrlimit() fails to change the file
11704 limit (which can happen sometimes on some versions of OSX). Fixes
11705 bug 21074; bugfix on 0.0.9pre5.
11707 o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
11708 - Fix a bug in the bit-counting parts of our timing-wheel code on
11709 MSVC. (Note that MSVC is still not a supported build platform, due
11710 to cyptographic timing channel risks.) Fixes bug 24633; bugfix
11713 o Minor bugfixes (relay, partial backport):
11714 - Make the internal channel_is_client() function look at what sort
11715 of connection handshake the other side used, rather than whether
11716 the other side ever sent a create_fast cell to us. Backports part
11717 of the fixes from bugs 22805 and 24898.
11719 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
11720 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11722 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11723 bugfix on 0.2.9.4-alpha.
11725 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
11726 - Update the "rust dependencies" submodule to be a project-level
11727 repository, rather than a user repository. Closes ticket 25323.
11730 Changes in version 0.2.9.15 - 2018-03-03
11731 Tor 0.2.9.15 backports important security and stability bugfixes from
11732 later Tor releases.
11734 It includes an important security fix for a remote crash attack
11735 against directory authorities, tracked as TROVE-2018-001.
11737 This release also backports our new system for improved resistance to
11738 denial-of-service attacks against relays.
11740 This release also fixes several minor bugs and annoyances from
11743 All directory authorities should upgrade to one of the versions
11744 released today. Relays running 0.2.9.x may wish to update to one of
11745 the versions released today, for the DoS mitigations.
11747 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11748 - Fix a protocol-list handling bug that could be used to remotely crash
11749 directory authorities with a null-pointer exception. Fixes bug 25074;
11750 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11753 o Major features (denial-of-service mitigation):
11754 - Give relays some defenses against the recent network overload. We
11755 start with three defenses (default parameters in parentheses).
11756 First: if a single client address makes too many concurrent
11757 connections (>100), hang up on further connections. Second: if a
11758 single client address makes circuits too quickly (more than 3 per
11759 second, with an allowed burst of 90) while also having too many
11760 connections open (3), refuse new create cells for the next while
11761 (1-2 hours). Third: if a client asks to establish a rendezvous
11762 point to you directly, ignore the request. These defenses can be
11763 manually controlled by new torrc options, but relays will also
11764 take guidance from consensus parameters, so there's no need to
11765 configure anything manually. Implements ticket 24902.
11767 o Major bugfixes (bootstrapping):
11768 - Fetch descriptors aggressively whenever we lack enough to build
11769 circuits, regardless of how many descriptors we are missing.
11770 Previously, we would delay launching the fetch when we had fewer
11771 than 15 missing descriptors, even if some of those descriptors
11772 were blocking circuits from building. Fixes bug 23985; bugfix on
11773 0.1.1.11-alpha. The effects of this bug became worse in
11774 0.3.0.3-alpha, when we began treating missing descriptors from our
11775 primary guards as a reason to delay circuits.
11777 o Major bugfixes (onion services, retry behavior):
11778 - Fix an "off by 2" error in counting rendezvous failures on the
11779 onion service side. While we thought we would stop the rendezvous
11780 attempt after one failed circuit, we were actually making three
11781 circuit attempts before giving up. Now switch to a default of 2,
11782 and allow the consensus parameter "hs_service_max_rdv_failures" to
11783 override. Fixes bug 24895; bugfix on 0.0.6.
11785 o Minor feature (relay statistics):
11786 - Change relay bandwidth reporting stats interval from 4 hours to 24
11787 hours in order to reduce the efficiency of guard discovery
11788 attacks. Fixes ticket 23856.
11790 o Minor features (compatibility, OpenSSL):
11791 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11792 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11793 since they neither disabled TLS 1.3 nor enabled any of the
11794 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11795 Closes ticket 24978.
11797 o Minor features (denial-of-service avoidance):
11798 - Make our OOM handler aware of the geoip client history cache so it
11799 doesn't fill up the memory. This check is important for IPv6 and
11800 our DoS mitigation subsystem. Closes ticket 25122.
11802 o Minor features (fallback directory mirrors):
11803 - The fallback directory list has been re-generated based on the
11804 current status of the network. Tor uses fallback directories to
11805 bootstrap when it doesn't yet have up-to-date directory
11806 information. Closes ticket 24801.
11807 - Make the default DirAuthorityFallbackRate 0.1, so that clients
11808 prefer to bootstrap from fallback directory mirrors. This is a
11809 follow-up to 24679, which removed weights from the default
11810 fallbacks. Implements ticket 24681.
11812 o Minor features (geoip):
11813 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11816 o Minor features (linux seccomp2 sandbox):
11817 - Update the sandbox rules so that they should now work correctly
11818 with Glibc 2.26. Closes ticket 24315.
11820 o Minor bugfix (channel connection):
11821 - Use the actual observed address of an incoming relay connection,
11822 not the canonical address of the relay from its descriptor, when
11823 making decisions about how to handle the incoming connection.
11824 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11826 o Minor bugfix (directory authority):
11827 - Directory authorities, when refusing a descriptor from a rejected
11828 relay, now explicitly tell the relay (in its logs) to set a valid
11829 ContactInfo address and contact the bad-relays@ mailing list.
11830 Fixes bug 25170; bugfix on 0.2.9.1.
11832 o Minor bugfixes (address selection):
11833 - When the fascist_firewall_choose_address_ functions don't find a
11834 reachable address, set the returned address to the null address
11835 and port. This is a precautionary measure, because some callers do
11836 not check the return value. Fixes bug 24736; bugfix
11839 o Minor bugfixes (compilation):
11840 - Fix a signed/unsigned comparison warning introduced by our fix to
11841 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
11843 o Minor bugfixes (control port, linux seccomp2 sandbox):
11844 - Avoid a crash when attempting to use the seccomp2 sandbox together
11845 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
11848 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
11849 - Fix a possible crash on malformed consensus. If a consensus had
11850 contained an unparseable protocol line, it could have made clients
11851 and relays crash with a null-pointer exception. To exploit this
11852 issue, however, an attacker would need to be able to subvert the
11853 directory authority system. Fixes bug 25251; bugfix on
11854 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11856 o Minor bugfixes (memory usage):
11857 - When queuing DESTROY cells on a channel, only queue the circuit-id
11858 and reason fields: not the entire 514-byte cell. This fix should
11859 help mitigate any bugs or attacks that fill up these queues, and
11860 free more RAM for other uses. Fixes bug 24666; bugfix
11863 o Minor bugfixes (network layer):
11864 - When closing a connection via close_connection_immediately(), we
11865 mark it as "not blocked on bandwidth", to prevent later calls from
11866 trying to unblock it, and give it permission to read. This fixes a
11867 backtrace warning that can happen on relays under various
11868 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
11870 o Minor bugfixes (OSX):
11871 - Don't exit the Tor process if setrlimit() fails to change the file
11872 limit (which can happen sometimes on some versions of OSX). Fixes
11873 bug 21074; bugfix on 0.0.9pre5.
11875 o Minor bugfixes (path selection):
11876 - When selecting relays by bandwidth, avoid a rounding error that
11877 could sometimes cause load to be imbalanced incorrectly.
11878 Previously, we would always round upwards; now, we round towards
11879 the nearest integer. This had the biggest effect when a relay's
11880 weight adjustments should have given it weight 0, but it got
11881 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
11882 - When calculating the fraction of nodes that have descriptors, and
11883 all nodes in the network have zero bandwidths, count the number of
11884 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
11885 - Actually log the total bandwidth in compute_weighted_bandwidths().
11886 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
11888 o Minor bugfixes (portability, msvc):
11889 - Fix a bug in the bit-counting parts of our timing-wheel code on
11890 MSVC. (Note that MSVC is still not a supported build platform, due
11891 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
11894 o Minor bugfixes (relay):
11895 - Make the internal channel_is_client() function look at what sort
11896 of connection handshake the other side used, rather than whether
11897 the other side ever sent a create_fast cell to us. Backports part
11898 of the fixes from bugs 22805 and 24898.
11900 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
11901 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11903 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11904 bugfix on 0.2.9.4-alpha.
11907 Changes in version 0.3.2.10 - 2018-03-03
11908 Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
11909 backports a number of bugfixes, including important fixes for security
11912 It includes an important security fix for a remote crash attack
11913 against directory authorities, tracked as TROVE-2018-001.
11915 Additionally, it backports a fix for a bug whose severity we have
11916 upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
11917 triggered in order to crash relays with a use-after-free pattern. As
11918 such, we are now tracking that bug as TROVE-2018-002 and
11919 CVE-2018-0491, and backporting it to earlier releases. This bug
11920 affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
11923 This release also backports our new system for improved resistance to
11924 denial-of-service attacks against relays.
11926 This release also fixes several minor bugs and annoyances from
11929 Relays running 0.3.2.x SHOULD upgrade to one of the versions released
11930 today, for the fix to TROVE-2018-002. Directory authorities should
11931 also upgrade. (Relays on earlier versions might want to update too for
11932 the DoS mitigations.)
11934 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11935 - Fix a protocol-list handling bug that could be used to remotely crash
11936 directory authorities with a null-pointer exception. Fixes bug 25074;
11937 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11940 o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
11941 - Avoid adding the same channel twice in the KIST scheduler pending
11942 list, which could lead to remote denial-of-service use-after-free
11943 attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
11945 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
11946 - Give relays some defenses against the recent network overload. We
11947 start with three defenses (default parameters in parentheses).
11948 First: if a single client address makes too many concurrent
11949 connections (>100), hang up on further connections. Second: if a
11950 single client address makes circuits too quickly (more than 3 per
11951 second, with an allowed burst of 90) while also having too many
11952 connections open (3), refuse new create cells for the next while
11953 (1-2 hours). Third: if a client asks to establish a rendezvous
11954 point to you directly, ignore the request. These defenses can be
11955 manually controlled by new torrc options, but relays will also
11956 take guidance from consensus parameters, so there's no need to
11957 configure anything manually. Implements ticket 24902.
11959 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
11960 - Fix an "off by 2" error in counting rendezvous failures on the
11961 onion service side. While we thought we would stop the rendezvous
11962 attempt after one failed circuit, we were actually making three
11963 circuit attempts before giving up. Now switch to a default of 2,
11964 and allow the consensus parameter "hs_service_max_rdv_failures" to
11965 override. Fixes bug 24895; bugfix on 0.0.6.
11966 - New-style (v3) onion services now obey the "max rendezvous circuit
11967 attempts" logic. Previously they would make as many rendezvous
11968 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
11969 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
11971 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
11972 - Add Link protocol version 5 to the supported protocols list. Fixes
11973 bug 25070; bugfix on 0.3.1.1-alpha.
11975 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
11976 - Fix a set of false positives where relays would consider
11977 connections to other relays as being client-only connections (and
11978 thus e.g. deserving different link padding schemes) if those
11979 relays fell out of the consensus briefly. Now we look only at the
11980 initial handshake and whether the connection authenticated as a
11981 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
11983 o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
11984 - The scheduler subsystem was failing to promptly notice changes in
11985 consensus parameters, making it harder to switch schedulers
11986 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
11988 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
11989 - Make our OOM handler aware of the geoip client history cache so it
11990 doesn't fill up the memory. This check is important for IPv6 and
11991 our DoS mitigation subsystem. Closes ticket 25122.
11993 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
11994 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11995 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11996 since they neither disabled TLS 1.3 nor enabled any of the
11997 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11998 Closes ticket 24978.
12000 o Minor features (geoip):
12001 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12004 o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
12005 - When logging a failure to create an onion service's descriptor,
12006 also log what the problem with the descriptor was. Diagnostic
12009 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
12010 - Use the actual observed address of an incoming relay connection,
12011 not the canonical address of the relay from its descriptor, when
12012 making decisions about how to handle the incoming connection.
12013 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12015 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
12016 - Fix a possible crash on malformed consensus. If a consensus had
12017 contained an unparseable protocol line, it could have made clients
12018 and relays crash with a null-pointer exception. To exploit this
12019 issue, however, an attacker would need to be able to subvert the
12020 directory authority system. Fixes bug 25251; bugfix on
12021 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12023 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
12024 - Directory authorities, when refusing a descriptor from a rejected
12025 relay, now explicitly tell the relay (in its logs) to set a valid
12026 ContactInfo address and contact the bad-relays@ mailing list.
12027 Fixes bug 25170; bugfix on 0.2.9.1.
12029 o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
12030 - When building with Rust on OSX, link against libresolv, to work
12031 around the issue at https://github.com/rust-lang/rust/issues/46797.
12032 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
12034 o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
12035 - Remove a BUG() statement when a client fetches an onion descriptor
12036 that has a lower revision counter than the one in its cache. This
12037 can happen in normal circumstances due to HSDir desync. Fixes bug
12038 24976; bugfix on 0.3.2.1-alpha.
12040 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
12041 - Don't treat inability to store a cached consensus object as a bug:
12042 it can happen normally when we are out of disk space. Fixes bug
12043 24859; bugfix on 0.3.1.1-alpha.
12045 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
12046 - Improve the performance of our consensus-diff application code
12047 when Tor is built with the --enable-fragile-hardening option set.
12048 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
12050 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
12051 - Don't exit the Tor process if setrlimit() fails to change the file
12052 limit (which can happen sometimes on some versions of OSX). Fixes
12053 bug 21074; bugfix on 0.0.9pre5.
12055 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
12056 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12058 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12059 bugfix on 0.2.9.4-alpha.
12061 o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
12062 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
12063 25005; bugfix on 0.3.2.7-rc.
12065 o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
12066 - Look at the "HSRend" protocol version, not the "HSDir" protocol
12067 version, when deciding whether a consensus entry can support the
12068 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
12069 bugfix on 0.3.2.1-alpha.
12071 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
12072 - Update the "rust dependencies" submodule to be a project-level
12073 repository, rather than a user repository. Closes ticket 25323.
12075 o Documentation (backport from 0.3.3.1-alpha)
12076 - Document that operators who run more than one relay or bridge are
12077 expected to set MyFamily and ContactInfo correctly. Closes
12081 Changes in version 0.3.3.3-alpha - 2018-03-03
12082 Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
12083 It includes an important security fix for a remote crash attack
12084 against directory authorities tracked as TROVE-2018-001.
12086 Additionally, with this release, we are upgrading the severity of a
12087 bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
12088 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
12089 a use-after-free pattern. As such, we are now tracking that bug as
12090 TROVE-2018-002 and CVE-2018-0491. This bug affected versions
12091 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
12093 This release also fixes several minor bugs and annoyances from
12096 Relays running 0.3.2.x should upgrade to one of the versions released
12097 today, for the fix to TROVE-2018-002. Directory authorities should
12098 also upgrade. (Relays on earlier versions might want to update too for
12099 the DoS mitigations.)
12101 o Major bugfixes (denial-of-service, directory authority):
12102 - Fix a protocol-list handling bug that could be used to remotely crash
12103 directory authorities with a null-pointer exception. Fixes bug 25074;
12104 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12107 o Minor features (compatibility, OpenSSL):
12108 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12109 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12110 since they neither disabled TLS 1.3 nor enabled any of the
12111 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12112 Closes ticket 24978.
12114 o Minor features (logging):
12115 - Clarify the log messages produced when getrandom() or a related
12116 entropy-generation mechanism gives an error. Closes ticket 25120.
12118 o Minor features (testing):
12119 - Add a "make test-rust" target to run the rust tests only. Closes
12122 o Minor bugfixes (denial-of-service):
12123 - Fix a possible crash on malformed consensus. If a consensus had
12124 contained an unparseable protocol line, it could have made clients
12125 and relays crash with a null-pointer exception. To exploit this
12126 issue, however, an attacker would need to be able to subvert the
12127 directory authority system. Fixes bug 25251; bugfix on
12128 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12130 o Minor bugfixes (DoS mitigation):
12131 - Add extra safety checks when refilling the circuit creation bucket
12132 to ensure we never set a value above the allowed maximum burst.
12133 Fixes bug 25202; bugfix on 0.3.3.2-alpha.
12134 - When a new consensus arrives, don't update our DoS-mitigation
12135 parameters if we aren't a public relay. Fixes bug 25223; bugfix
12138 o Minor bugfixes (man page, SocksPort):
12139 - Remove dead code from the old "SocksSocket" option, and rename
12140 SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
12141 still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
12143 o Minor bugfixes (performance):
12144 - Reduce the number of circuits that will be opened at once during
12145 the circuit build timeout phase. This is done by increasing the
12146 idle timeout to 3 minutes, and lowering the maximum number of
12147 concurrent learning circuits to 10. Fixes bug 24769; bugfix
12150 o Minor bugfixes (spec conformance):
12151 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12153 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12154 bugfix on 0.2.9.4-alpha.
12156 o Minor bugfixes (spec conformance, rust):
12157 - Resolve a denial-of-service issue caused by an infinite loop in
12158 the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
12159 Also tracked as TROVE-2018-003.
12161 o Code simplification and refactoring:
12162 - Update the "rust dependencies" submodule to be a project-level
12163 repository, rather than a user repository. Closes ticket 25323.
12166 Changes in version 0.3.3.2-alpha - 2018-02-10
12167 Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
12168 introduces a mechanism to handle the high loads that many relay
12169 operators have been reporting recently. It also fixes several bugs in
12170 older releases. If this new code proves reliable, we plan to backport
12171 it to older supported release series.
12173 o Major features (denial-of-service mitigation):
12174 - Give relays some defenses against the recent network overload. We
12175 start with three defenses (default parameters in parentheses).
12176 First: if a single client address makes too many concurrent
12177 connections (>100), hang up on further connections. Second: if a
12178 single client address makes circuits too quickly (more than 3 per
12179 second, with an allowed burst of 90) while also having too many
12180 connections open (3), refuse new create cells for the next while
12181 (1-2 hours). Third: if a client asks to establish a rendezvous
12182 point to you directly, ignore the request. These defenses can be
12183 manually controlled by new torrc options, but relays will also
12184 take guidance from consensus parameters, so there's no need to
12185 configure anything manually. Implements ticket 24902.
12187 o Major bugfixes (netflow padding):
12188 - Stop adding unneeded channel padding right after we finish
12189 flushing to a connection that has been trying to flush for many
12190 seconds. Instead, treat all partial or complete flushes as
12191 activity on the channel, which will defer the time until we need
12192 to add padding. This fix should resolve confusing and scary log
12193 messages like "Channel padding timeout scheduled 221453ms in the
12194 past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
12196 o Major bugfixes (protocol versions):
12197 - Add Link protocol version 5 to the supported protocols list. Fixes
12198 bug 25070; bugfix on 0.3.1.1-alpha.
12200 o Major bugfixes (scheduler, consensus):
12201 - The scheduler subsystem was failing to promptly notice changes in
12202 consensus parameters, making it harder to switch schedulers
12203 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
12205 o Minor features (denial-of-service avoidance):
12206 - Make our OOM handler aware of the geoip client history cache so it
12207 doesn't fill up the memory. This check is important for IPv6 and
12208 our DoS mitigation subsystem. Closes ticket 25122.
12210 o Minor features (directory authority):
12211 - When directory authorities are unable to add signatures to a
12212 pending consensus, log the reason why. Closes ticket 24849.
12214 o Minor features (geoip):
12215 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12218 o Minor features (logging, diagnostic):
12219 - When logging a failure to create an onion service's descriptor,
12220 also log what the problem with the descriptor was. Diagnostic for
12223 o Minor bugfix (channel connection):
12224 - Use the actual observed address of an incoming relay connection,
12225 not the canonical address of the relay from its descriptor, when
12226 making decisions about how to handle the incoming connection.
12227 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12229 o Minor bugfix (directory authority):
12230 - Directory authorities, when refusing a descriptor from a rejected
12231 relay, now explicitly tell the relay (in its logs) to set a valid
12232 ContactInfo address and contact the bad-relays@ mailing list.
12233 Fixes bug 25170; bugfix on 0.2.9.1.
12235 o Minor bugfixes (all versions of Tor):
12236 - Use the "misspell" tool to detect and fix typos throughout the
12237 source code. Fixes bug 23650; bugfix on various versions of Tor.
12238 Patch from Deepesh Pathak.
12240 o Minor bugfixes (circuit, cannibalization):
12241 - Don't cannibalize preemptively-built circuits if we no longer
12242 recognize their first hop. This situation can happen if our Guard
12243 relay went off the consensus after the circuit was created. Fixes
12244 bug 24469; bugfix on 0.0.6.
12246 o Minor bugfixes (correctness):
12247 - Remove a nonworking, unnecessary check to see whether a circuit
12248 hop's identity digest was set when the circuit failed. Fixes bug
12249 24927; bugfix on 0.2.4.4-alpha.
12251 o Minor bugfixes (logging):
12252 - Don't treat inability to store a cached consensus object as a bug:
12253 it can happen normally when we are out of disk space. Fixes bug
12254 24859; bugfix on 0.3.1.1-alpha.
12255 - Fix a (mostly harmless) race condition when invoking
12256 LOG_PROTOCOL_WARN message from a subthread while the torrc options
12257 are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
12259 o Minor bugfixes (onion services):
12260 - Remove a BUG() statement when a client fetches an onion descriptor
12261 that has a lower revision counter than the one in its cache. This
12262 can happen in normal circumstances due to HSDir desync. Fixes bug
12263 24976; bugfix on 0.3.2.1-alpha.
12264 - If we are configured to offer a single onion service, don't log
12265 long-term established one hop rendezvous points in the heartbeat.
12266 Fixes bug 25116; bugfix on 0.2.9.6-rc.
12268 o Minor bugfixes (performance):
12269 - Avoid calling protocol_list_supports_protocol() from inside tight
12270 loops when running with cached routerinfo_t objects. Instead,
12271 summarize the relevant protocols as flags in the routerinfo_t, as
12272 we do for routerstatus_t objects. This change simplifies our code
12273 a little, and saves a large amount of short-term memory allocation
12274 operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
12276 o Minor bugfixes (Rust FFI):
12277 - Fix a minor memory leak which would happen whenever the C code
12278 would call the Rust implementation of
12279 protover_get_supported_protocols(). This was due to the C version
12280 returning a static string, whereas the Rust version newly allocated
12281 a CString to pass across the FFI boundary. Consequently, the C
12282 code was not expecting to need to free() what it was given. Fixes
12283 bug 25127; bugfix on 0.3.2.1-alpha.
12285 o Minor bugfixes (scheduler, KIST):
12286 - Avoid adding the same channel twice in the KIST scheduler pending
12287 list, which would waste CPU cycles. Fixes bug 24700; bugfix
12290 o Minor bugfixes (unit test, monotonic time):
12291 - Increase a constant (1msec to 10msec) in the monotonic time test
12292 that makes sure the nsec/usec/msec times read are synchronized.
12293 This change was needed to accommodate slow systems like armel or
12294 when the clock_gettime() is not a VDSO on the running kernel.
12295 Fixes bug 25113; bugfix on 0.2.9.1.
12297 o Minor bugfixes (v3 onion services):
12298 - Look at the "HSRend" protocol version, not the "HSDir" protocol
12299 version, when deciding whether a consensus entry can support the
12300 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
12301 bugfix on 0.3.2.1-alpha.
12303 o Code simplification and refactoring:
12304 - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
12306 - Remove a series of counters used to track circuit extend attempts
12307 and connection status but that in reality we aren't using for
12308 anything other than stats logged by a SIGUSR1 signal. Closes
12311 o Documentation (man page):
12312 - The HiddenServiceVersion torrc option accepts only one number:
12313 either version 2 or 3. Closes ticket 25026; bugfix
12317 Changes in version 0.3.3.1-alpha - 2018-01-25
12318 Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
12319 several new features to Tor, including several improvements to
12320 bootstrapping, and support for an experimental "vanguards" feature to
12321 resist guard discovery attacks. This series also includes better
12322 support for applications that need to embed Tor or manage v3
12325 o Major features (embedding):
12326 - There is now a documented stable API for programs that need to
12327 embed Tor. See tor_api.h for full documentation and known bugs.
12328 Closes ticket 23684.
12329 - Tor now has support for restarting in the same process.
12330 Controllers that run Tor using the "tor_api.h" interface can now
12331 restart Tor after Tor has exited. This support is incomplete,
12332 however: we fixed crash bugs that prevented it from working at
12333 all, but many bugs probably remain, including a possibility of
12334 security issues. Implements ticket 24581.
12336 o Major features (IPv6, directory documents):
12337 - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
12338 consensus. This information makes it easier for IPv6 clients to
12339 bootstrap and choose reachable entry guards. Implements ticket 23826.
12340 - Add consensus method 28, which removes IPv6 ORPorts from
12341 microdescriptors. Now that the consensus contains IPv6 ORPorts, they
12342 are redundant in microdescs. This change will be used by Tor clients
12343 on 0.2.8.x and later. (That is to say, with all Tor clients that
12344 have IPv6 bootstrap and guard support.) Implements ticket 23828.
12345 - Expand the documentation for AuthDirHasIPv6Connectivity when it is
12346 set by different numbers of authorities. Fixes 23870
12349 o Major features (onion service v3, control port):
12350 - The control port now supports commands and events for v3 onion
12351 services. It is now possible to create ephemeral v3 services using
12352 ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
12353 CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
12354 DEL_ONION) have been extended to support v3 onion services. Closes
12355 ticket 20699; implements proposal 284.
12357 o Major features (onion services):
12358 - Provide torrc options to pin the second and third hops of onion
12359 service circuits to a list of nodes. The option HSLayer2Guards
12360 pins the second hop, and the option HSLayer3Guards pins the third
12361 hop. These options are for use in conjunction with experiments
12362 with "vanguards" for preventing guard enumeration attacks. Closes
12365 o Major features (rust, portability, experimental):
12366 - Tor now ships with an optional implementation of one of its
12367 smaller modules (protover.c) in the Rust programming language. To
12368 try it out, install a Rust build environment, and configure Tor
12369 with "--enable-rust --enable-cargo-online-mode". This should not
12370 cause any user-visible changes, but should help us gain more
12371 experience with Rust, and plan future Rust integration work.
12372 Implementation by Chelsea Komlo. Closes ticket 22840.
12374 o Minor features (storage, configuration):
12375 - Users can store cached directory documents somewhere other than
12376 the DataDirectory by using the CacheDirectory option. Similarly,
12377 the storage location for relay's keys can be overridden with the
12378 KeyDirectory option. Closes ticket 22703.
12380 o Major features (v3 onion services, ipv6):
12381 - When v3 onion service clients send introduce cells, they now
12382 include the IPv6 address of the rendezvous point, if it has one.
12383 Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
12384 in future Tor versions, IPv6-only v3 single onion services will be
12385 able to use IPv6 addresses to connect directly to the rendezvous
12386 point. Closes ticket 23577. Patch by Neel Chauhan.
12388 o Major bugfixes (onion services, retry behavior):
12389 - Fix an "off by 2" error in counting rendezvous failures on the
12390 onion service side. While we thought we would stop the rendezvous
12391 attempt after one failed circuit, we were actually making three
12392 circuit attempts before giving up. Now switch to a default of 2,
12393 and allow the consensus parameter "hs_service_max_rdv_failures" to
12394 override. Fixes bug 24895; bugfix on 0.0.6.
12395 - New-style (v3) onion services now obey the "max rendezvous circuit
12396 attempts" logic. Previously they would make as many rendezvous
12397 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
12398 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
12400 o Major bugfixes (relays):
12401 - Fix a set of false positives where relays would consider
12402 connections to other relays as being client-only connections (and
12403 thus e.g. deserving different link padding schemes) if those
12404 relays fell out of the consensus briefly. Now we look only at the
12405 initial handshake and whether the connection authenticated as a
12406 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
12408 o Minor feature (IPv6):
12409 - Make IPv6-only clients wait for microdescs for relays, even if we
12410 were previously using descriptors (or were using them as a bridge)
12411 and have a cached descriptor for them. Implements ticket 23827.
12412 - When a consensus has IPv6 ORPorts, make IPv6-only clients use
12413 them, rather than waiting to download microdescriptors.
12414 Implements ticket 23827.
12416 o Minor features (cleanup):
12417 - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
12418 when it stops. Closes ticket 23271.
12420 o Minor features (defensive programming):
12421 - Most of the functions in Tor that free objects have been replaced
12422 with macros that free the objects and set the corresponding
12423 pointers to NULL. This change should help prevent a large class of
12424 dangling pointer bugs. Closes ticket 24337.
12425 - Where possible, the tor_free() macro now only evaluates its input
12426 once. Part of ticket 24337.
12427 - Check that microdesc ed25519 ids are non-zero in
12428 node_get_ed25519_id() before returning them. Implements ticket
12429 24001, patch by "aruna1234".
12431 o Minor features (embedding):
12432 - Tor can now start with a preauthenticated control connection
12433 created by the process that launched it. This feature is meant for
12434 use by programs that want to launch and manage a Tor process
12435 without allowing other programs to manage it as well. For more
12436 information, see the __OwningControllerFD option documented in
12437 control-spec.txt. Closes ticket 23900.
12438 - On most errors that would cause Tor to exit, it now tries to
12439 return from the tor_main() function, rather than calling the
12440 system exit() function. Most users won't notice a difference here,
12441 but it should be significant for programs that run Tor inside
12442 a separate thread: they should now be able to survive Tor's exit
12443 conditions rather than having Tor shut down the entire process.
12444 Closes ticket 23848.
12445 - Applications that want to embed Tor can now tell Tor not to
12446 register any of its own POSIX signal handlers, using the
12447 __DisableSignalHandlers option. Closes ticket 24588.
12449 o Minor features (fallback directory list):
12450 - Avoid selecting fallbacks that change their IP addresses too
12451 often. Select more fallbacks by ignoring the Guard flag, and
12452 allowing lower cutoffs for the Running and V2Dir flags. Also allow
12453 a lower bandwidth, and a higher number of fallbacks per operator
12454 (5% of the list). Implements ticket 24785.
12455 - Update the fallback whitelist and blacklist based on opt-ins and
12456 relay changes. Closes tickets 22321, 24678, 22527, 24135,
12459 o Minor features (fallback directory mirror configuration):
12460 - Add a nickname to each fallback in a C comment. This makes it
12461 easier for operators to find their relays, and allows stem to use
12462 nicknames to identify fallbacks. Implements ticket 24600.
12463 - Add a type and version header to the fallback directory mirror
12464 file. Also add a delimiter to the end of each fallback entry. This
12465 helps external parsers like stem and Relay Search. Implements
12467 - Add an extrainfo cache flag for each fallback in a C comment. This
12468 allows stem to use fallbacks to fetch extra-info documents, rather
12469 than using authorities. Implements ticket 22759.
12470 - Add the generateFallbackDirLine.py script for automatically
12471 generating fallback directory mirror lines from relay fingerprints.
12472 No more typos! Add the lookupFallbackDirContact.py script for
12473 automatically looking up operator contact info from relay
12474 fingerprints. Implements ticket 24706, patch by teor and atagar.
12475 - Reject any fallback directory mirror that serves an expired
12476 consensus. Implements ticket 20942, patch by "minik".
12477 - Remove commas and equals signs from external string inputs to the
12478 fallback list. This avoids format confusion attacks. Implements
12480 - Remove the "weight=10" line from fallback directory mirror
12481 entries. Ticket 24681 will maintain the current fallback weights
12482 by changing Tor's default fallback weight to 10. Implements
12484 - Stop logging excessive information about fallback netblocks.
12485 Implements ticket 24791.
12487 o Minor features (forward-compatibility):
12488 - If a relay supports some link authentication protocol that we do
12489 not recognize, then include that relay's ed25519 key when telling
12490 other relays to extend to it. Previously, we treated future
12491 versions as if they were too old to support ed25519 link
12492 authentication. Closes ticket 20895.
12494 o Minor features (heartbeat):
12495 - Add onion service information to our heartbeat logs, displaying
12496 stats about the activity of configured onion services. Closes
12499 o Minor features (instrumentation, development):
12500 - Add the MainloopStats option to allow developers to get
12501 instrumentation information from the main event loop via the
12502 heartbeat messages. We hope to use this to improve Tor's behavior
12503 when it's trying to sleep. Closes ticket 24605.
12505 o Minor features (log messages):
12506 - Improve a warning message that happens when we fail to re-parse an
12507 old router because of an expired certificate. Closes ticket 20020.
12508 - Make the log more quantitative when we hit MaxMemInQueues
12509 threshold exposing some values. Closes ticket 24501.
12511 o Minor features (logging, android):
12512 - Added support for the Android logging subsystem. Closes
12515 o Minor features (performance):
12516 - Support predictive circuit building for onion service circuits
12517 with multiple layers of guards. Closes ticket 23101.
12518 - Use stdatomic.h where available, rather than mutexes, to implement
12519 atomic_counter_t. Closes ticket 23953.
12521 o Minor features (performance, 32-bit):
12522 - Improve performance on 32-bit systems by avoiding 64-bit division
12523 when calculating the timestamp in milliseconds for channel padding
12524 computations. Implements ticket 24613.
12525 - Improve performance on 32-bit systems by avoiding 64-bit division
12526 when timestamping cells and buffer chunks for OOM calculations.
12527 Implements ticket 24374.
12529 o Minor features (performance, OSX, iOS):
12530 - Use the mach_approximate_time() function (when available) to
12531 implement coarse monotonic time. Having a coarse time function
12532 should avoid a large number of system calls, and improve
12533 performance slightly, especially under load. Closes ticket 24427.
12535 o Minor features (performance, windows):
12536 - Improve performance on Windows Vista and Windows 7 by adjusting
12537 TCP send window size according to the recommendation from
12538 SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
12541 o Major features (relay):
12542 - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
12543 operator to use a more reasonable ("reduced") exit policy, rather
12544 than the default one. If you want to run an exit node without
12545 thinking too hard about which ports to allow, this one is for you.
12546 Closes ticket 13605. Patch from Neel Chauhan.
12548 o Minor features (testing, debugging, embedding):
12549 - For development purposes, Tor now has a mode in which it runs for
12550 a few seconds, then stops, and starts again without exiting the
12551 process. This mode is meant to help us debug various issues with
12552 ticket 23847. To use this feature, compile with
12553 --enable-restart-debugging, and set the TOR_DEBUG_RESTART
12554 environment variable. This is expected to crash a lot, and is
12555 really meant for developers only. It will likely be removed in a
12556 future release. Implements ticket 24583.
12558 o Minor bugfix (network IPv6 test):
12559 - Tor's test scripts now check if "ping -6 ::1" works when the user
12560 runs "make test-network-all". Fixes bug 24677; bugfix on
12561 0.2.9.3-alpha. Patch by "ffmancera".
12563 o Minor bugfixes (build, rust):
12564 - Fix output of autoconf checks to display success messages for Rust
12565 dependencies and a suitable rustc compiler version. Fixes bug
12566 24612; bugfix on 0.3.1.3-alpha.
12567 - When building with Rust on OSX, link against libresolv, to work
12568 around the issue at https://github.com/rust-lang/rust/issues/46797.
12569 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
12570 - Don't pass the --quiet option to cargo: it seems to suppress some
12571 errors, which is not what we want to do when building. Fixes bug
12572 24518; bugfix on 0.3.1.7.
12573 - Build correctly when building from outside Tor's source tree with
12574 the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
12577 o Minor bugfixes (directory authorities, IPv6):
12578 - When creating a routerstatus (vote) from a routerinfo (descriptor),
12579 set the IPv6 address to the unspecified IPv6 address, and
12580 explicitly initialize the port to zero. Fixes bug 24488; bugfix
12583 o Minor bugfixes (fallback directory mirrors):
12584 - Make updateFallbackDirs.py search harder for python. (Some OSs
12585 don't put it in /usr/bin.) Fixes bug 24708; bugfix
12588 o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
12589 - When hibernating, close connections normally and allow them to
12590 flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
12592 - Do not attempt to launch self-reachability tests when entering
12593 hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
12594 - Resolve several bugs related to descriptor fetching on bridge
12595 clients with bandwidth accounting enabled. (This combination is
12596 not recommended!) Fixes a case of bug 12062; bugfix
12598 - When hibernating, do not attempt to launch DNS checks. Fixes a
12599 case of bug 12062; bugfix on 0.1.2.2-alpha.
12600 - When hibernating, do not try to upload or download descriptors.
12601 Fixes a case of bug 12062; bugfix on 0.0.9pre5.
12603 o Minor bugfixes (IPv6, bridges):
12604 - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
12605 bugfix on 0.2.8.2-alpha.
12606 - Tor now sets IPv6 address in the routerstatus as well as in the
12607 router descriptors when updating addresses for a bridge. Closes
12608 ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
12610 o Minor bugfixes (linux seccomp2 sandbox):
12611 - When running with the sandbox enabled, reload configuration files
12612 correctly even when %include was used. Previously we would crash.
12613 Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
12615 o Minor bugfixes (memory leaks):
12616 - Avoid possible at-exit memory leaks related to use of Libevent's
12617 event_base_once() function. (This function tends to leak memory if
12618 the event_base is closed before the event fires.) Fixes bug 24584;
12619 bugfix on 0.2.8.1-alpha.
12620 - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
12623 o Minor bugfixes (OSX):
12624 - Don't exit the Tor process if setrlimit() fails to change the file
12625 limit (which can happen sometimes on some versions of OSX). Fixes
12626 bug 21074; bugfix on 0.0.9pre5.
12628 o Minor bugfixes (performance, fragile-hardening):
12629 - Improve the performance of our consensus-diff application code
12630 when Tor is built with the --enable-fragile-hardening option set.
12631 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
12633 o Minor bugfixes (performance, timeouts):
12634 - Consider circuits for timeout as soon as they complete a hop. This
12635 is more accurate than applying the timeout in
12636 circuit_expire_building() because that function is only called
12637 once per second, which is now too slow for typical timeouts on the
12638 current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
12639 - Use onion service circuits (and other circuits longer than 3 hops)
12640 to calculate a circuit build timeout. Previously, Tor only
12641 calculated its build timeout based on circuits that planned to be
12642 exactly 3 hops long. With this change, we include measurements
12643 from all circuits at the point where they complete their third
12644 hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
12646 o Minor bugfixes (testing):
12647 - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
12648 bugfix on 0.2.3.1-alpha.
12649 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
12650 25005; bugfix on 0.3.2.7-rc.
12652 o Code simplification and refactoring:
12653 - Remove /usr/athena from search path in configure.ac. Closes
12655 - Remove duplicate code in node_has_curve25519_onion_key() and
12656 node_get_curve25519_onion_key(), and add a check for a zero
12657 microdesc curve25519 onion key. Closes ticket 23966, patch by
12658 "aruna1234" and teor.
12659 - Rewrite channel_rsa_id_group_set_badness to reduce temporary
12660 memory allocations with large numbers of OR connections (e.g.
12661 relays). Closes ticket 24119.
12662 - Separate the function that deletes ephemeral files when Tor
12664 - Small changes to Tor's buf_t API to make it suitable for use as a
12665 general-purpose safe string constructor. Closes ticket 22342.
12666 - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
12667 avoid source code identifier confusion. Closes ticket 24467.
12668 - The tor_git_revision[] constant no longer needs to be redeclared
12669 by everything that links against the rest of Tor. Done as part of
12670 ticket 23845, to simplify our external API.
12671 - We make extend_info_from_node() use node_get_curve25519_onion_key()
12672 introduced in ticket 23577 to access the curve25519 public keys
12673 rather than accessing it directly. Closes ticket 23760. Patch by
12675 - Add a function to log channels' scheduler state changes to aid
12676 debugging efforts. Closes ticket 24531.
12679 - Add documentation on how to build tor with Rust dependencies
12680 without having to be online. Closes ticket 22907; bugfix
12682 - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
12683 traffic. Closes ticket 24318.
12684 - Document that OutboundBindAddress doesn't apply to DNS requests.
12685 Closes ticket 22145. Patch from Aruna Maurya.
12686 - Document that operators who run more than one relay or bridge are
12687 expected to set MyFamily and ContactInfo correctly. Closes
12690 o Code simplification and refactoring (channels):
12691 - Remove the incoming and outgoing channel queues. These were never
12692 used, but still took up a step in our fast path.
12693 - The majority of the channel unit tests have been rewritten and the
12694 code coverage has now been raised to 83.6% for channel.c. Closes
12696 - Remove other dead code from the channel subsystem: All together,
12697 this cleanup has removed more than 1500 lines of code overall and
12698 adding very little except for unit test.
12700 o Code simplification and refactoring (circuit rendezvous):
12701 - Split the client-side rendezvous circuit lookup into two
12702 functions: one that returns only established circuits and another
12703 that returns all kinds of circuits. Closes ticket 23459.
12705 o Code simplification and refactoring (controller):
12706 - Make most of the variables in networkstatus_getinfo_by_purpose()
12707 const. Implements ticket 24489.
12710 Changes in version 0.3.2.9 - 2018-01-09
12711 Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
12713 The 0.3.2 series includes our long-anticipated new onion service
12714 design, with numerous security features. (For more information, see
12715 our blog post at https://blog.torproject.org/fall-harvest.) We also
12716 have a new circuit scheduler algorithm for improved performance on
12717 relays everywhere (see https://blog.torproject.org/kist-and-tell),
12718 along with many smaller features and bugfixes.
12720 Per our stable release policy, we plan to support each stable release
12721 series for at least the next nine months, or for three months after
12722 the first stable release of the next series: whichever is longer. If
12723 you need a release with long-term support, we recommend that you stay
12724 with the 0.2.9 series.
12726 Below is a list of the changes since 0.3.2.8-rc. For a list of all
12727 changes since 0.3.1, see the ReleaseNotes file.
12729 o Minor features (fallback directory mirrors):
12730 - The fallback directory list has been re-generated based on the
12731 current status of the network. Tor uses fallback directories to
12732 bootstrap when it doesn't yet have up-to-date directory
12733 information. Closes ticket 24801.
12734 - Make the default DirAuthorityFallbackRate 0.1, so that clients
12735 prefer to bootstrap from fallback directory mirrors. This is a
12736 follow-up to 24679, which removed weights from the default
12737 fallbacks. Implements ticket 24681.
12739 o Minor features (geoip):
12740 - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
12743 o Minor bugfixes (address selection):
12744 - When the fascist_firewall_choose_address_ functions don't find a
12745 reachable address, set the returned address to the null address
12746 and port. This is a precautionary measure, because some callers do
12747 not check the return value. Fixes bug 24736; bugfix
12750 o Minor bugfixes (compilation):
12751 - Resolve a few shadowed-variable warnings in the onion service
12752 code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
12754 o Minor bugfixes (portability, msvc):
12755 - Fix a bug in the bit-counting parts of our timing-wheel code on
12756 MSVC. (Note that MSVC is still not a supported build platform, due
12757 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
12761 Changes in version 0.3.2.8-rc - 2017-12-21
12762 Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
12763 schedulers that had led servers under heavy load to overload their
12764 outgoing connections. All relay operators running earlier 0.3.2.x
12765 versions should upgrade. This version also includes a mitigation for
12766 over-full DESTROY queues leading to out-of-memory conditions: if it
12767 works, we will soon backport it to earlier release series.
12769 This is the second release candidate in the 0.3.2 series. If we find
12770 no new bugs or regression here, then the first stable 0.3.2 release
12771 will be nearly identical to this.
12773 o Major bugfixes (KIST, scheduler):
12774 - The KIST scheduler did not correctly account for data already
12775 enqueued in each connection's send socket buffer, particularly in
12776 cases when the TCP/IP congestion window was reduced between
12777 scheduler calls. This situation lead to excessive per-connection
12778 buffering in the kernel, and a potential memory DoS. Fixes bug
12779 24665; bugfix on 0.3.2.1-alpha.
12781 o Minor features (geoip):
12782 - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
12785 o Minor bugfixes (hidden service v3):
12786 - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
12787 the probability of reaching a service for a client missing
12788 microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
12790 o Minor bugfixes (memory usage):
12791 - When queuing DESTROY cells on a channel, only queue the circuit-id
12792 and reason fields: not the entire 514-byte cell. This fix should
12793 help mitigate any bugs or attacks that fill up these queues, and
12794 free more RAM for other uses. Fixes bug 24666; bugfix
12797 o Minor bugfixes (scheduler, KIST):
12798 - Use a sane write limit for KISTLite when writing onto a connection
12799 buffer instead of using INT_MAX and shoving as much as it can.
12800 Because the OOM handler cleans up circuit queues, we are better
12801 off at keeping them in that queue instead of the connection's
12802 buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
12805 Changes in version 0.3.2.7-rc - 2017-12-14
12806 Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
12807 including some that could affect reliability or correctness.
12809 This is the first release candidate in the 0.3.2 series. If we find no
12810 new bugs or regression here, then the first stable 0.3.2. release will
12811 be nearly identical to this.
12813 o Major bugfixes (circuit prediction):
12814 - Fix circuit prediction logic so that a client doesn't treat a port
12815 as being "handled" by a circuit if that circuit already has
12816 isolation settings on it. This change should make Tor clients more
12817 responsive by improving their chances of having a pre-created
12818 circuit ready for use when a request arrives. Fixes bug 18859;
12819 bugfix on 0.2.3.3-alpha.
12821 o Minor features (logging):
12822 - Provide better warnings when the getrandom() syscall fails. Closes
12825 o Minor features (portability):
12826 - Tor now compiles correctly on arm64 with libseccomp-dev installed.
12827 (It doesn't yet work with the sandbox enabled.) Closes
12830 o Minor bugfixes (bridge clients, bootstrap):
12831 - Retry directory downloads when we get our first bridge descriptor
12832 during bootstrap or while reconnecting to the network. Keep
12833 retrying every time we get a bridge descriptor, until we have a
12834 reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
12835 - Stop delaying bridge descriptor fetches when we have cached bridge
12836 descriptors. Instead, only delay bridge descriptor fetches when we
12837 have at least one reachable bridge. Fixes part of bug 24367;
12838 bugfix on 0.2.0.3-alpha.
12839 - Stop delaying directory fetches when we have cached bridge
12840 descriptors. Instead, only delay bridge descriptor fetches when
12841 all our bridges are definitely unreachable. Fixes part of bug
12842 24367; bugfix on 0.2.0.3-alpha.
12844 o Minor bugfixes (compilation):
12845 - Fix a signed/unsigned comparison warning introduced by our fix to
12846 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
12848 o Minor bugfixes (correctness):
12849 - Fix several places in our codebase where a C compiler would be
12850 likely to eliminate a check, based on assuming that undefined
12851 behavior had not happened elsewhere in the code. These cases are
12852 usually a sign of redundant checking or dubious arithmetic. Found
12853 by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
12854 Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
12857 o Minor bugfixes (onion service v3):
12858 - Fix a race where an onion service would launch a new intro circuit
12859 after closing an old one, but fail to register it before freeing
12860 the previously closed circuit. This bug was making the service
12861 unable to find the established intro circuit and thus not upload
12862 its descriptor, thus making a service unavailable for up to 24
12863 hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
12865 o Minor bugfixes (scheduler, KIST):
12866 - Properly set the scheduler state of an unopened channel in the
12867 KIST scheduler main loop. This prevents a harmless but annoying
12868 log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
12869 - Avoid a possible integer overflow when computing the available
12870 space on the TCP buffer of a channel. This had no security
12871 implications; but could make KIST allow too many cells on a
12872 saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
12873 - Downgrade to "info" a harmless warning about the monotonic time
12874 moving backwards: This can happen on platform not supporting
12875 monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
12878 Changes in version 0.3.2.6-alpha - 2017-12-01
12879 This version of Tor is the latest in the 0.3.2 alpha series. It
12880 includes fixes for several important security issues. All Tor users
12881 should upgrade to this release, or to one of the other releases coming
12884 o Major bugfixes (security):
12885 - Fix a denial of service bug where an attacker could use a
12886 malformed directory object to cause a Tor instance to pause while
12887 OpenSSL would try to read a passphrase from the terminal. (Tor
12888 instances run without a terminal, which is the case for most Tor
12889 packages, are not impacted.) Fixes bug 24246; bugfix on every
12890 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12891 Found by OSS-Fuzz as testcase 6360145429790720.
12892 - Fix a denial of service issue where an attacker could crash a
12893 directory authority using a malformed router descriptor. Fixes bug
12894 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
12896 - When checking for replays in the INTRODUCE1 cell data for a
12897 (legacy) onion service, correctly detect replays in the RSA-
12898 encrypted part of the cell. We were previously checking for
12899 replays on the entire cell, but those can be circumvented due to
12900 the malleability of Tor's legacy hybrid encryption. This fix helps
12901 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12902 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12905 o Major bugfixes (security, onion service v2):
12906 - Fix a use-after-free error that could crash v2 Tor onion services
12907 when they failed to open circuits while expiring introduction
12908 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12909 also tracked as TROVE-2017-013 and CVE-2017-8823.
12911 o Major bugfixes (security, relay):
12912 - When running as a relay, make sure that we never build a path
12913 through ourselves, even in the case where we have somehow lost the
12914 version of our descriptor appearing in the consensus. Fixes part
12915 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12916 as TROVE-2017-012 and CVE-2017-8822.
12917 - When running as a relay, make sure that we never choose ourselves
12918 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
12919 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
12921 o Minor feature (relay statistics):
12922 - Change relay bandwidth reporting stats interval from 4 hours to 24
12923 hours in order to reduce the efficiency of guard discovery
12924 attacks. Fixes ticket 23856.
12926 o Minor features (directory authority):
12927 - Add an IPv6 address for the "bastet" directory authority. Closes
12930 o Minor bugfixes (client):
12931 - By default, do not enable storage of client-side DNS values. These
12932 values were unused by default previously, but they should not have
12933 been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
12936 Changes in version 0.3.1.9 - 2017-12-01:
12937 Tor 0.3.1.9 backports important security and stability fixes from the
12938 0.3.2 development series. All Tor users should upgrade to this
12939 release, or to another of the releases coming out today.
12941 o Major bugfixes (security, backport from 0.3.2.6-alpha):
12942 - Fix a denial of service bug where an attacker could use a
12943 malformed directory object to cause a Tor instance to pause while
12944 OpenSSL would try to read a passphrase from the terminal. (Tor
12945 instances run without a terminal, which is the case for most Tor
12946 packages, are not impacted.) Fixes bug 24246; bugfix on every
12947 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12948 Found by OSS-Fuzz as testcase 6360145429790720.
12949 - Fix a denial of service issue where an attacker could crash a
12950 directory authority using a malformed router descriptor. Fixes bug
12951 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
12953 - When checking for replays in the INTRODUCE1 cell data for a
12954 (legacy) onion service, correctly detect replays in the RSA-
12955 encrypted part of the cell. We were previously checking for
12956 replays on the entire cell, but those can be circumvented due to
12957 the malleability of Tor's legacy hybrid encryption. This fix helps
12958 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12959 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12962 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
12963 - Fix a use-after-free error that could crash v2 Tor onion services
12964 when they failed to open circuits while expiring introduction
12965 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12966 also tracked as TROVE-2017-013 and CVE-2017-8823.
12968 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
12969 - When running as a relay, make sure that we never build a path
12970 through ourselves, even in the case where we have somehow lost the
12971 version of our descriptor appearing in the consensus. Fixes part
12972 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12973 as TROVE-2017-012 and CVE-2017-8822.
12974 - When running as a relay, make sure that we never choose ourselves
12975 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
12976 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
12978 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
12979 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
12980 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
12981 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
12982 identifying and finding a workaround to this bug and to Moritz,
12983 Arthur Edelstein, and Roger for helping to track it down and
12986 o Minor features (bridge):
12987 - Bridges now include notice in their descriptors that they are
12988 bridges, and notice of their distribution status, based on their
12989 publication settings. Implements ticket 18329. For more fine-
12990 grained control of how a bridge is distributed, upgrade to 0.3.2.x
12993 o Minor features (directory authority, backport from 0.3.2.6-alpha):
12994 - Add an IPv6 address for the "bastet" directory authority. Closes
12997 o Minor features (geoip):
12998 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13001 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13002 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13003 relays, to prevent spurious address resolutions and descriptor
13004 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13005 bugfix on in 0.2.8.1-alpha.
13007 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13008 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13009 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13011 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13012 - When a circuit is marked for close, do not attempt to package any
13013 cells for channels on that circuit. Previously, we would detect
13014 this condition lower in the call stack, when we noticed that the
13015 circuit had no attached channel, and log an annoying message.
13016 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13018 o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
13019 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
13020 so it matches dir-spec.txt. Fixes bug 24262; bugfix
13023 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13024 - Avoid a crash when transitioning from client mode to bridge mode.
13025 Previously, we would launch the worker threads whenever our
13026 "public server" mode changed, but not when our "server" mode
13027 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13030 Changes in version 0.3.0.13 - 2017-12-01
13031 Tor 0.3.0.13 backports important security and stability bugfixes from
13032 later Tor releases. All Tor users should upgrade to this release, or
13033 to another of the releases coming out today.
13035 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
13036 2018. If you need a release with long-term support, please stick with
13037 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13039 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13040 - Fix a denial of service bug where an attacker could use a
13041 malformed directory object to cause a Tor instance to pause while
13042 OpenSSL would try to read a passphrase from the terminal. (Tor
13043 instances run without a terminal, which is the case for most Tor
13044 packages, are not impacted.) Fixes bug 24246; bugfix on every
13045 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13046 Found by OSS-Fuzz as testcase 6360145429790720.
13047 - Fix a denial of service issue where an attacker could crash a
13048 directory authority using a malformed router descriptor. Fixes bug
13049 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13051 - When checking for replays in the INTRODUCE1 cell data for a
13052 (legacy) onion service, correctly detect replays in the RSA-
13053 encrypted part of the cell. We were previously checking for
13054 replays on the entire cell, but those can be circumvented due to
13055 the malleability of Tor's legacy hybrid encryption. This fix helps
13056 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13057 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13060 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13061 - Fix a use-after-free error that could crash v2 Tor onion services
13062 when they failed to open circuits while expiring introduction
13063 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13064 also tracked as TROVE-2017-013 and CVE-2017-8823.
13066 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13067 - When running as a relay, make sure that we never build a path
13068 through ourselves, even in the case where we have somehow lost the
13069 version of our descriptor appearing in the consensus. Fixes part
13070 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13071 as TROVE-2017-012 and CVE-2017-8822.
13072 - When running as a relay, make sure that we never choose ourselves
13073 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13074 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13076 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13077 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13078 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13079 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13080 identifying and finding a workaround to this bug and to Moritz,
13081 Arthur Edelstein, and Roger for helping to track it down and
13084 o Minor features (security, windows, backport from 0.3.1.1-alpha):
13085 - Enable a couple of pieces of Windows hardening: one
13086 (HeapEnableTerminationOnCorruption) that has been on-by-default
13087 since Windows 8, and unavailable before Windows 7; and one
13088 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
13089 affect us, but shouldn't do any harm. Closes ticket 21953.
13091 o Minor features (bridge, backport from 0.3.1.9):
13092 - Bridges now include notice in their descriptors that they are
13093 bridges, and notice of their distribution status, based on their
13094 publication settings. Implements ticket 18329. For more fine-
13095 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13098 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13099 - Add an IPv6 address for the "bastet" directory authority. Closes
13102 o Minor features (geoip):
13103 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13106 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13107 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13108 relays, to prevent spurious address resolutions and descriptor
13109 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13110 bugfix on in 0.2.8.1-alpha.
13112 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13113 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13114 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13116 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13117 - When a circuit is marked for close, do not attempt to package any
13118 cells for channels on that circuit. Previously, we would detect
13119 this condition lower in the call stack, when we noticed that the
13120 circuit had no attached channel, and log an annoying message.
13121 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13123 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13124 - Avoid a crash when transitioning from client mode to bridge mode.
13125 Previously, we would launch the worker threads whenever our
13126 "public server" mode changed, but not when our "server" mode
13127 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13129 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13130 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13131 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13134 Changes in version 0.2.9.14 - 2017-12-01
13135 Tor 0.3.0.13 backports important security and stability bugfixes from
13136 later Tor releases. All Tor users should upgrade to this release, or
13137 to another of the releases coming out today.
13139 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13140 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13141 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13142 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13143 identifying and finding a workaround to this bug and to Moritz,
13144 Arthur Edelstein, and Roger for helping to track it down and
13147 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13148 - Fix a denial of service bug where an attacker could use a
13149 malformed directory object to cause a Tor instance to pause while
13150 OpenSSL would try to read a passphrase from the terminal. (Tor
13151 instances run without a terminal, which is the case for most Tor
13152 packages, are not impacted.) Fixes bug 24246; bugfix on every
13153 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13154 Found by OSS-Fuzz as testcase 6360145429790720.
13155 - Fix a denial of service issue where an attacker could crash a
13156 directory authority using a malformed router descriptor. Fixes bug
13157 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13159 - When checking for replays in the INTRODUCE1 cell data for a
13160 (legacy) onion service, correctly detect replays in the RSA-
13161 encrypted part of the cell. We were previously checking for
13162 replays on the entire cell, but those can be circumvented due to
13163 the malleability of Tor's legacy hybrid encryption. This fix helps
13164 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13165 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13168 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13169 - Fix a use-after-free error that could crash v2 Tor onion services
13170 when they failed to open circuits while expiring introduction
13171 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13172 also tracked as TROVE-2017-013 and CVE-2017-8823.
13174 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13175 - When running as a relay, make sure that we never build a path
13176 through ourselves, even in the case where we have somehow lost the
13177 version of our descriptor appearing in the consensus. Fixes part
13178 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13179 as TROVE-2017-012 and CVE-2017-8822.
13181 o Minor features (bridge, backport from 0.3.1.9):
13182 - Bridges now include notice in their descriptors that they are
13183 bridges, and notice of their distribution status, based on their
13184 publication settings. Implements ticket 18329. For more fine-
13185 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13188 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13189 - Add an IPv6 address for the "bastet" directory authority. Closes
13192 o Minor features (geoip):
13193 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13196 o Minor features (security, windows, backport from 0.3.1.1-alpha):
13197 - Enable a couple of pieces of Windows hardening: one
13198 (HeapEnableTerminationOnCorruption) that has been on-by-default
13199 since Windows 8, and unavailable before Windows 7; and one
13200 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
13201 affect us, but shouldn't do any harm. Closes ticket 21953.
13203 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13204 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13205 relays, to prevent spurious address resolutions and descriptor
13206 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13207 bugfix on in 0.2.8.1-alpha.
13209 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13210 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13211 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13213 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13214 - When a circuit is marked for close, do not attempt to package any
13215 cells for channels on that circuit. Previously, we would detect
13216 this condition lower in the call stack, when we noticed that the
13217 circuit had no attached channel, and log an annoying message.
13218 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13220 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13221 - Avoid a crash when transitioning from client mode to bridge mode.
13222 Previously, we would launch the worker threads whenever our
13223 "public server" mode changed, but not when our "server" mode
13224 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13226 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13227 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13228 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13231 Changes in version 0.2.8.17 - 2017-12-01
13232 Tor 0.2.8.17 backports important security and stability bugfixes from
13233 later Tor releases. All Tor users should upgrade to this release, or
13234 to another of the releases coming out today.
13236 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
13237 2018. If you need a release with long-term support, please upgrade with
13238 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13240 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13241 - Fix a denial of service bug where an attacker could use a
13242 malformed directory object to cause a Tor instance to pause while
13243 OpenSSL would try to read a passphrase from the terminal. (Tor
13244 instances run without a terminal, which is the case for most Tor
13245 packages, are not impacted.) Fixes bug 24246; bugfix on every
13246 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13247 Found by OSS-Fuzz as testcase 6360145429790720.
13248 - When checking for replays in the INTRODUCE1 cell data for a
13249 (legacy) onion service, correctly detect replays in the RSA-
13250 encrypted part of the cell. We were previously checking for
13251 replays on the entire cell, but those can be circumvented due to
13252 the malleability of Tor's legacy hybrid encryption. This fix helps
13253 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13254 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13257 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13258 - Fix a use-after-free error that could crash v2 Tor onion services
13259 when they failed to open circuits while expiring introduction
13260 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13261 also tracked as TROVE-2017-013 and CVE-2017-8823.
13263 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13264 - When running as a relay, make sure that we never build a path through
13265 ourselves, even in the case where we have somehow lost the version of
13266 our descriptor appearing in the consensus. Fixes part of bug 21534;
13267 bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
13270 o Minor features (bridge, backport from 0.3.1.9):
13271 - Bridges now include notice in their descriptors that they are
13272 bridges, and notice of their distribution status, based on their
13273 publication settings. Implements ticket 18329. For more fine-
13274 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13277 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13278 - Add an IPv6 address for the "bastet" directory authority. Closes
13281 o Minor features (geoip):
13282 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13285 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13286 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13287 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13290 Changes in version 0.2.5.16 - 2017-12-01
13291 Tor 0.2.5.13 backports important security and stability bugfixes from
13292 later Tor releases. All Tor users should upgrade to this release, or
13293 to another of the releases coming out today.
13295 Note: the Tor 0.2.5 series will no longer be supported after 1 May
13296 2018. If you need a release with long-term support, please upgrade to
13297 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13299 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13300 - Fix a denial of service bug where an attacker could use a
13301 malformed directory object to cause a Tor instance to pause while
13302 OpenSSL would try to read a passphrase from the terminal. (Tor
13303 instances run without a terminal, which is the case for most Tor
13304 packages, are not impacted.) Fixes bug 24246; bugfix on every
13305 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13306 Found by OSS-Fuzz as testcase 6360145429790720.
13307 - When checking for replays in the INTRODUCE1 cell data for a
13308 (legacy) onion service, correctly detect replays in the RSA-
13309 encrypted part of the cell. We were previously checking for
13310 replays on the entire cell, but those can be circumvented due to
13311 the malleability of Tor's legacy hybrid encryption. This fix helps
13312 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13313 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13316 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13317 - When running as a relay, make sure that we never build a path
13318 through ourselves, even in the case where we have somehow lost the
13319 version of our descriptor appearing in the consensus. Fixes part
13320 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13321 as TROVE-2017-012 and CVE-2017-8822.
13323 o Minor features (bridge, backport from 0.3.1.9):
13324 - Bridges now include notice in their descriptors that they are
13325 bridges, and notice of their distribution status, based on their
13326 publication settings. Implements ticket 18329. For more fine-
13327 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13330 o Minor features (geoip):
13331 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13335 Changes in version 0.3.2.5-alpha - 2017-11-22
13336 Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
13337 fixes several stability and reliability bugs, including a fix for
13338 intermittent bootstrapping failures that some people have been seeing
13339 since the 0.3.0.x series.
13341 Please test this alpha out -- many of these fixes will soon be
13342 backported to stable Tor versions if no additional bugs are found
13345 o Major bugfixes (bootstrapping):
13346 - Fetch descriptors aggressively whenever we lack enough to build
13347 circuits, regardless of how many descriptors we are missing.
13348 Previously, we would delay launching the fetch when we had fewer
13349 than 15 missing descriptors, even if some of those descriptors
13350 were blocking circuits from building. Fixes bug 23985; bugfix on
13351 0.1.1.11-alpha. The effects of this bug became worse in
13352 0.3.0.3-alpha, when we began treating missing descriptors from our
13353 primary guards as a reason to delay circuits.
13354 - Don't try fetching microdescriptors from relays that have failed
13355 to deliver them in the past. Fixes bug 23817; bugfix
13358 o Minor features (directory authority):
13359 - Make the "Exit" flag assignment only depend on whether the exit
13360 policy allows connections to ports 80 and 443. Previously relays
13361 would get the Exit flag if they allowed connections to one of
13362 these ports and also port 6667. Resolves ticket 23637.
13364 o Minor features (geoip):
13365 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13368 o Minor features (linux seccomp2 sandbox):
13369 - Update the sandbox rules so that they should now work correctly
13370 with Glibc 2.26. Closes ticket 24315.
13372 o Minor features (logging):
13373 - Downgrade a pair of log messages that could occur when an exit's
13374 resolver gave us an unusual (but not forbidden) response. Closes
13376 - Improve the message we log when re-enabling circuit build timeouts
13377 after having received a consensus. Closes ticket 20963.
13379 o Minor bugfixes (compilation):
13380 - Fix a memory leak warning in one of the libevent-related
13381 configuration tests that could occur when manually specifying
13382 -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
13383 Found and patched by Alex Xu.
13384 - When detecting OpenSSL on Windows from our configure script, make
13385 sure to try linking with the ws2_32 library. Fixes bug 23783;
13386 bugfix on 0.3.2.2-alpha.
13388 o Minor bugfixes (control port, linux seccomp2 sandbox):
13389 - Avoid a crash when attempting to use the seccomp2 sandbox together
13390 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
13393 o Minor bugfixes (control port, onion services):
13394 - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
13395 HS_DESC event when a service is not able to upload a descriptor.
13396 Fixes bug 24230; bugfix on 0.2.7.1-alpha.
13398 o Minor bugfixes (directory cache):
13399 - Recover better from empty or corrupt files in the consensus cache
13400 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
13401 - When a consensus diff calculation is only partially successful,
13402 only record the successful parts as having succeeded. Partial
13403 success can happen if (for example) one compression method fails
13404 but the others succeed. Previously we misrecorded all the
13405 calculations as having succeeded, which would later cause a
13406 nonfatal assertion failure. Fixes bug 24086; bugfix
13409 o Minor bugfixes (logging):
13410 - Only log once if we notice that KIST support is gone. Fixes bug
13411 24158; bugfix on 0.3.2.1-alpha.
13412 - Suppress a log notice when relay descriptors arrive. We already
13413 have a bootstrap progress for this so no need to log notice
13414 everytime tor receives relay descriptors. Microdescriptors behave
13415 the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
13417 o Minor bugfixes (network layer):
13418 - When closing a connection via close_connection_immediately(), we
13419 mark it as "not blocked on bandwidth", to prevent later calls from
13420 trying to unblock it, and give it permission to read. This fixes a
13421 backtrace warning that can happen on relays under various
13422 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
13424 o Minor bugfixes (onion services):
13425 - The introduction circuit was being timed out too quickly while
13426 waiting for the rendezvous circuit to complete. Keep the intro
13427 circuit around longer instead of timing out and reopening new ones
13428 constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
13429 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
13430 so it matches dir-spec.txt. Fixes bug 24262; bugfix
13432 - Silence a warning about failed v3 onion descriptor uploads that
13433 can happen naturally under certain edge cases. Fixes part of bug
13434 23662; bugfix on 0.3.2.1-alpha.
13436 o Minor bugfixes (tests):
13437 - Fix a memory leak in one of the bridge-distribution test cases.
13438 Fixes bug 24345; bugfix on 0.3.2.3-alpha.
13439 - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
13440 to correctly handle cases where a caller gives it an RSA key of
13441 under 160 bits. (This is not actually a bug in Tor itself, but
13442 rather in our fuzzing code.) Fixes bug 24247; bugfix on
13443 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
13446 - Add notes in man page regarding OS support for the various
13447 scheduler types. Attempt to use less jargon in the scheduler
13448 section. Closes ticket 24254.
13451 Changes in version 0.3.2.4-alpha - 2017-11-08
13452 Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
13453 It fixes several stability and reliability bugs, especially including
13454 a major reliability issue that has been plaguing fast exit relays in
13457 o Major bugfixes (exit relays, DNS):
13458 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13459 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13460 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13461 identifying and finding a workaround to this bug and to Moritz,
13462 Arthur Edelstein, and Roger for helping to track it down and
13465 o Major bugfixes (scheduler, channel):
13466 - Stop processing scheduled channels if they closed while flushing
13467 cells. This can happen if the write on the connection fails
13468 leading to the channel being closed while in the scheduler loop.
13469 Fixes bug 23751; bugfix on 0.3.2.1-alpha.
13471 o Minor features (logging, scheduler):
13472 - Introduce a SCHED_BUG() function to log extra information about
13473 the scheduler state if we ever catch a bug in the scheduler.
13474 Closes ticket 23753.
13476 o Minor features (removed deprecations):
13477 - The ClientDNSRejectInternalAddresses flag can once again be set in
13478 non-testing Tor networks, so long as they do not use the default
13479 directory authorities. This change also removes the deprecation of
13480 this flag from 0.2.9.2-alpha. Closes ticket 21031.
13482 o Minor features (testing):
13483 - Our fuzzing tests now test the encrypted portions of v3 onion
13484 service descriptors. Implements more of 21509.
13486 o Minor bugfixes (directory client):
13487 - On failure to download directory information, delay retry attempts
13488 by a random amount based on the "decorrelated jitter" algorithm.
13489 Our previous delay algorithm tended to produce extra-long delays
13490 too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
13492 o Minor bugfixes (IPv6, v3 single onion services):
13493 - Remove buggy code for IPv6-only v3 single onion services, and
13494 reject attempts to configure them. This release supports IPv4,
13495 dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
13496 stack v3 single onion services. Fixes bug 23820; bugfix
13499 o Minor bugfixes (logging, relay):
13500 - Give only a protocol warning when the ed25519 key is not
13501 consistent between the descriptor and microdescriptor of a relay.
13502 This can happen, for instance, if the relay has been flagged
13503 NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
13505 o Minor bugfixes (manpage, onion service):
13506 - Document that the HiddenServiceNumIntroductionPoints option is
13507 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
13508 bugfix on 0.3.2.1-alpha.
13510 o Minor bugfixes (memory leaks):
13511 - Fix a minor memory leak at exit in the KIST scheduler. This bug
13512 should have no user-visible impact. Fixes bug 23774; bugfix
13514 - Fix a memory leak when decrypting a badly formatted v3 onion
13515 service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
13516 Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
13518 o Minor bugfixes (onion services):
13519 - Cache some needed onion service client information instead of
13520 constantly computing it over and over again. Fixes bug 23623;
13521 bugfix on 0.3.2.1-alpha.
13522 - Properly retry HSv3 descriptor fetches when missing required
13523 directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
13525 o Minor bugfixes (path selection):
13526 - When selecting relays by bandwidth, avoid a rounding error that
13527 could sometimes cause load to be imbalanced incorrectly.
13528 Previously, we would always round upwards; now, we round towards
13529 the nearest integer. This had the biggest effect when a relay's
13530 weight adjustments should have given it weight 0, but it got
13531 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
13532 - When calculating the fraction of nodes that have descriptors, and
13533 all nodes in the network have zero bandwidths, count the number of
13534 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
13535 - Actually log the total bandwidth in compute_weighted_bandwidths().
13536 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
13538 o Minor bugfixes (relay, crash):
13539 - Avoid a crash when transitioning from client mode to bridge mode.
13540 Previously, we would launch the worker threads whenever our
13541 "public server" mode changed, but not when our "server" mode
13542 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13544 o Minor bugfixes (testing):
13545 - Fix a spurious fuzzing-only use of an uninitialized value. Found
13546 by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
13547 - Test that IPv6-only clients can use microdescriptors when running
13548 "make test-network-all". Requires chutney master 61c28b9 or later.
13549 Closes ticket 24109.
13552 Changes in version 0.3.2.3-alpha - 2017-10-27
13553 Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
13554 numerous small bugs in earlier versions of 0.3.2.x, and adds a new
13555 directory authority, Bastet.
13557 o Directory authority changes:
13558 - Add "Bastet" as a ninth directory authority to the default list.
13559 Closes ticket 23910.
13560 - The directory authority "Longclaw" has changed its IP address.
13561 Closes ticket 23592.
13563 o Minor features (bridge):
13564 - Bridge relays can now set the BridgeDistribution config option to
13565 add a "bridge-distribution-request" line to their bridge
13566 descriptor, which tells BridgeDB how they'd like their bridge
13567 address to be given out. (Note that as of Oct 2017, BridgeDB does
13568 not yet implement this feature.) As a side benefit, this feature
13569 provides a way to distinguish bridge descriptors from non-bridge
13570 descriptors. Implements tickets 18329.
13572 o Minor features (client, entry guards):
13573 - Improve log messages when missing descriptors for primary guards.
13574 Resolves ticket 23670.
13576 o Minor features (geoip):
13577 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13580 o Minor bugfixes (bridge):
13581 - Overwrite the bridge address earlier in the process of retrieving
13582 its descriptor, to make sure we reach it on the configured
13583 address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
13585 o Minor bugfixes (documentation):
13586 - Document better how to read gcov, and what our gcov postprocessing
13587 scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
13589 o Minor bugfixes (entry guards):
13590 - Tor now updates its guard state when it reads a consensus
13591 regardless of whether it's missing descriptors. That makes tor use
13592 its primary guards to fetch descriptors in some edge cases where
13593 it would previously have used fallback directories. Fixes bug
13594 23862; bugfix on 0.3.0.1-alpha.
13596 o Minor bugfixes (hidden service client):
13597 - When handling multiple SOCKS request for the same .onion address,
13598 only fetch the service descriptor once.
13599 - When a descriptor fetch fails with a non-recoverable error, close
13600 all pending SOCKS requests for that .onion. Fixes bug 23653;
13601 bugfix on 0.3.2.1-alpha.
13603 o Minor bugfixes (hidden service):
13604 - Always regenerate missing hidden service public key files. Prior
13605 to this, if the public key was deleted from disk, it wouldn't get
13606 recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
13608 - Make sure that we have a usable ed25519 key when the intro point
13609 relay supports ed25519 link authentication. Fixes bug 24002;
13610 bugfix on 0.3.2.1-alpha.
13612 o Minor bugfixes (hidden service, v2):
13613 - When reloading configured hidden services, copy all information
13614 from the old service object. Previously, some data was omitted,
13615 causing delays in descriptor upload, and other bugs. Fixes bug
13616 23790; bugfix on 0.2.1.9-alpha.
13618 o Minor bugfixes (memory safety, defensive programming):
13619 - Clear the target address when node_get_prim_orport() returns
13620 early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13622 o Minor bugfixes (relay):
13623 - Avoid a BUG warning when receiving a dubious CREATE cell while an
13624 option transition is in progress. Fixes bug 23952; bugfix
13627 o Minor bugfixes (testing):
13628 - Adjust the GitLab CI configuration to more closely match that of
13629 Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
13630 - Prevent scripts/test/coverage from attempting to move gcov output
13631 to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
13632 - When running unit tests as root, skip a test that would fail
13633 because it expects a permissions error. This affects some
13634 continuous integration setups. Fixes bug 23758; bugfix
13636 - Stop unconditionally mirroring the tor repository in GitLab CI.
13637 This prevented developers from enabling GitLab CI on master. Fixes
13638 bug 23755; bugfix on 0.3.2.2-alpha.
13639 - Fix the hidden service v3 descriptor decoding fuzzing to use the
13640 latest decoding API correctly. Fixes bug 21509; bugfix
13643 o Minor bugfixes (warnings):
13644 - When we get an HTTP request on a SOCKS port, tell the user about
13645 the new HTTPTunnelPort option. Previously, we would give a "Tor is
13646 not an HTTP Proxy" message, which stopped being true when
13647 HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
13651 Changes in version 0.2.5.15 - 2017-10-25
13652 Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
13653 series. It also adds a new directory authority, Bastet.
13655 Note: the Tor 0.2.5 series will no longer be supported after 1 May
13656 2018. If you need a release with long-term support, please upgrade to
13657 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13659 o Directory authority changes:
13660 - Add "Bastet" as a ninth directory authority to the default list.
13661 Closes ticket 23910.
13662 - The directory authority "Longclaw" has changed its IP address.
13663 Closes ticket 23592.
13665 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13666 - Avoid an assertion failure bug affecting our implementation of
13667 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13668 handling of "0xx" differs from what we had expected. Fixes bug
13669 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13671 o Minor features (geoip):
13672 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13675 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
13676 - Fix a memset() off the end of an array when packing cells. This
13677 bug should be harmless in practice, since the corrupted bytes are
13678 still in the same structure, and are always padding bytes,
13679 ignored, or immediately overwritten, depending on compiler
13680 behavior. Nevertheless, because the memset()'s purpose is to make
13681 sure that any other cell-handling bugs can't expose bytes to the
13682 network, we need to fix it. Fixes bug 22737; bugfix on
13683 0.2.4.11-alpha. Fixes CID 1401591.
13685 o Build features (backport from 0.3.1.5-alpha):
13686 - Tor's repository now includes a Travis Continuous Integration (CI)
13687 configuration file (.travis.yml). This is meant to help new
13688 developers and contributors who fork Tor to a Github repository be
13689 better able to test their changes, and understand what we expect
13690 to pass. To use this new build feature, you must fork Tor to your
13691 Github account, then go into the "Integrations" menu in the
13692 repository settings for your fork and enable Travis, then push
13693 your changes. Closes ticket 22636.
13696 Changes in version 0.2.8.16 - 2017-10-25
13697 Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
13698 series, including a bugfix for a crash issue that had affected relays
13699 under memory pressure. It also adds a new directory authority, Bastet.
13701 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
13702 2018. If you need a release with long-term support, please stick with
13703 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13705 o Directory authority changes:
13706 - Add "Bastet" as a ninth directory authority to the default list.
13707 Closes ticket 23910.
13708 - The directory authority "Longclaw" has changed its IP address.
13709 Closes ticket 23592.
13711 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13712 - Fix a timing-based assertion failure that could occur when the
13713 circuit out-of-memory handler freed a connection's output buffer.
13714 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13716 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13717 - Remove longclaw's IPv6 address, as it will soon change. Authority
13718 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13719 3/8 directory authorities with IPv6 addresses, but there are also
13720 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13722 o Minor features (geoip):
13723 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13727 Changes in version 0.2.9.13 - 2017-10-25
13728 Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
13729 series, including a bugfix for a crash issue that had affected relays
13730 under memory pressure. It also adds a new directory authority, Bastet.
13732 o Directory authority changes:
13733 - Add "Bastet" as a ninth directory authority to the default list.
13734 Closes ticket 23910.
13735 - The directory authority "Longclaw" has changed its IP address.
13736 Closes ticket 23592.
13738 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13739 - Fix a timing-based assertion failure that could occur when the
13740 circuit out-of-memory handler freed a connection's output buffer.
13741 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13743 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13744 - Remove longclaw's IPv6 address, as it will soon change. Authority
13745 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13746 3/8 directory authorities with IPv6 addresses, but there are also
13747 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13749 o Minor features (geoip):
13750 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13753 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
13754 - When a directory authority rejects a descriptor or extrainfo with
13755 a given digest, mark that digest as undownloadable, so that we do
13756 not attempt to download it again over and over. We previously
13757 tried to avoid downloading such descriptors by other means, but we
13758 didn't notice if we accidentally downloaded one anyway. This
13759 behavior became problematic in 0.2.7.2-alpha, when authorities
13760 began pinning Ed25519 keys. Fixes bug 22349; bugfix
13763 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
13764 - Clear the address when node_get_prim_orport() returns early.
13765 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13767 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
13768 - When running as a Windows service, set the ID of the main thread
13769 correctly. Failure to do so made us fail to send log messages to
13770 the controller in 0.2.1.16-rc, slowed down controller event
13771 delivery in 0.2.7.3-rc and later, and crash with an assertion
13772 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
13773 Patch and diagnosis from "Vort".
13776 Changes in version 0.3.0.12 - 2017-10-25
13777 Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
13778 series, including a bugfix for a crash issue that had affected relays
13779 under memory pressure. It also adds a new directory authority, Bastet.
13781 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
13782 2018. If you need a release with long-term support, please stick with
13783 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13785 o Directory authority changes:
13786 - Add "Bastet" as a ninth directory authority to the default list.
13787 Closes ticket 23910.
13788 - The directory authority "Longclaw" has changed its IP address.
13789 Closes ticket 23592.
13791 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13792 - Fix a timing-based assertion failure that could occur when the
13793 circuit out-of-memory handler freed a connection's output buffer.
13794 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13796 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13797 - Remove longclaw's IPv6 address, as it will soon change. Authority
13798 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13799 3/8 directory authorities with IPv6 addresses, but there are also
13800 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13802 o Minor features (geoip):
13803 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13806 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
13807 - When a directory authority rejects a descriptor or extrainfo with
13808 a given digest, mark that digest as undownloadable, so that we do
13809 not attempt to download it again over and over. We previously
13810 tried to avoid downloading such descriptors by other means, but we
13811 didn't notice if we accidentally downloaded one anyway. This
13812 behavior became problematic in 0.2.7.2-alpha, when authorities
13813 began pinning Ed25519 keys. Fixes bug 22349; bugfix
13816 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
13817 - Avoid a possible double close of a circuit by the intro point on
13818 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
13819 bugfix on 0.3.0.1-alpha.
13821 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
13822 - Clear the address when node_get_prim_orport() returns early.
13823 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13825 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
13826 - When running as a Windows service, set the ID of the main thread
13827 correctly. Failure to do so made us fail to send log messages to
13828 the controller in 0.2.1.16-rc, slowed down controller event
13829 delivery in 0.2.7.3-rc and later, and crash with an assertion
13830 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
13831 Patch and diagnosis from "Vort".
13834 Changes in version 0.3.1.8 - 2017-10-25
13835 Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
13836 It includes several bugfixes, including a bugfix for a crash issue
13837 that had affected relays under memory pressure. It also adds
13838 a new directory authority, Bastet.
13840 o Directory authority changes:
13841 - Add "Bastet" as a ninth directory authority to the default list.
13842 Closes ticket 23910.
13843 - The directory authority "Longclaw" has changed its IP address.
13844 Closes ticket 23592.
13846 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13847 - Fix a timing-based assertion failure that could occur when the
13848 circuit out-of-memory handler freed a connection's output buffer.
13849 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13851 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13852 - Remove longclaw's IPv6 address, as it will soon change. Authority
13853 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13854 3/8 directory authorities with IPv6 addresses, but there are also
13855 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13857 o Minor features (geoip):
13858 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13861 o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
13862 - Fix a compilation warning when building with zstd support on
13863 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
13864 and fixed by Andreas Stieger.
13866 o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
13867 - Handle a pathological case when decompressing Zstandard data when
13868 the output buffer size is zero. Fixes bug 23551; bugfix
13871 o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
13872 - Remove the length limit on HTTP status lines that authorities can
13873 send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
13875 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
13876 - Avoid a possible double close of a circuit by the intro point on
13877 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
13878 bugfix on 0.3.0.1-alpha.
13880 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
13881 - Clear the address when node_get_prim_orport() returns early.
13882 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13884 o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
13885 - Fix additional channelpadding unit test failures by using mocked
13886 time instead of actual time for all tests. Fixes bug 23608; bugfix
13890 Changes in version 0.3.2.2-alpha - 2017-09-29
13891 Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
13892 release fixes several minor bugs in the new scheduler and next-
13893 generation onion services; both features were newly added in the 0.3.2
13894 series. Other fixes in this alpha include several fixes for non-fatal
13895 tracebacks which would appear in logs.
13897 With the aim to stabilise the 0.3.2 series by 15 December 2017, this
13898 alpha does not contain any substantial new features. Minor features
13899 include better testing and logging.
13901 The following comprises the complete list of changes included
13904 o Major bugfixes (relay, crash, assertion failure):
13905 - Fix a timing-based assertion failure that could occur when the
13906 circuit out-of-memory handler freed a connection's output buffer.
13907 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13909 o Major bugfixes (scheduler):
13910 - If a channel is put into the scheduler's pending list, then it
13911 starts closing, and then if the scheduler runs before it finishes
13912 closing, the scheduler will get stuck trying to flush its cells
13913 while the lower layers refuse to cooperate. Fix that race
13914 condition by giving the scheduler an escape method. Fixes bug
13915 23676; bugfix on 0.3.2.1-alpha.
13917 o Minor features (build, compilation):
13918 - The "check-changes" feature is now part of the "make check" tests;
13919 we'll use it to try to prevent misformed changes files from
13920 accumulating. Closes ticket 23564.
13921 - Tor builds should now fail if there are any mismatches between the
13922 C type representing a configuration variable and the C type the
13923 data-driven parser uses to store a value there. Previously, we
13924 needed to check these by hand, which sometimes led to mistakes.
13925 Closes ticket 23643.
13927 o Minor features (directory authorities):
13928 - Remove longclaw's IPv6 address, as it will soon change. Authority
13929 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13930 3/8 directory authorities with IPv6 addresses, but there are also
13931 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13933 o Minor features (hidden service, circuit, logging):
13934 - Improve logging of many callsite in the circuit subsystem to print
13935 the circuit identifier(s).
13936 - Log when we cleanup an intro point from a service so we know when
13937 and for what reason it happened. Closes ticket 23604.
13939 o Minor features (logging):
13940 - Log more circuit information whenever we are about to try to
13941 package a relay cell on a circuit with a nonexistent n_chan.
13942 Attempt to diagnose ticket 8185.
13943 - Improve info-level log identification of particular circuits, to
13944 help with debugging. Closes ticket 23645.
13946 o Minor features (relay):
13947 - When choosing which circuits can be expired as unused, consider
13948 circuits from clients even if those clients used regular CREATE
13949 cells to make them; and do not consider circuits from relays even
13950 if they were made with CREATE_FAST. Part of ticket 22805.
13952 o Minor features (robustness):
13953 - Change several fatal assertions when flushing buffers into non-
13954 fatal assertions, to prevent any recurrence of 23690.
13956 o Minor features (spec conformance, bridge, diagnostic):
13957 - When handling the USERADDR command on an ExtOrPort, warn when the
13958 transports provides a USERADDR with no port. In a future version,
13959 USERADDR commands of this format may be rejected. Detects problems
13960 related to ticket 23080.
13962 o Minor features (testing):
13963 - Add a unit test to make sure that our own generated platform
13964 string will be accepted by directory authorities. Closes
13967 o Minor bugfixes (bootstrapping):
13968 - When warning about state file clock skew, report the correct
13969 direction for the detected skew. Fixes bug 23606; bugfix
13971 - Avoid an assertion failure when logging a state file clock skew
13972 very early in bootstrapping. Fixes bug 23607; bugfix
13975 o Minor bugfixes (build, compilation):
13976 - Fix a compilation warning when building with zstd support on
13977 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
13978 and fixed by Andreas Stieger.
13979 - When searching for OpenSSL, don't accept any OpenSSL library that
13980 lacks TLSv1_1_method(): Tor doesn't build with those versions.
13981 Additionally, look in /usr/local/opt/openssl, if it's present.
13982 These changes together repair the default build on OSX systems
13983 with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
13985 o Minor bugfixes (compression):
13986 - Handle a pathological case when decompressing Zstandard data when
13987 the output buffer size is zero. Fixes bug 23551; bugfix
13990 o Minor bugfixes (documentation):
13991 - Fix manpage to not refer to the obsolete (and misspelled)
13992 UseEntryGuardsAsDirectoryGuards parameter in the description of
13993 NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
13995 o Minor bugfixes (hidden service v3):
13996 - Don't log an assertion failure when we can't find the right
13997 information to extend to an introduction point. In rare cases,
13998 this could happen, causing a warning, even though tor would
13999 recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
14000 - Pad RENDEZVOUS cell up to the size of the legacy cell which is
14001 much bigger so the rendezvous point can't distinguish which hidden
14002 service protocol is being used. Fixes bug 23420; bugfix
14005 o Minor bugfixes (hidden service, relay):
14006 - Avoid a possible double close of a circuit by the intro point on
14007 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
14008 bugfix on 0.3.0.1-alpha.
14010 o Minor bugfixes (logging, relay shutdown, annoyance):
14011 - When a circuit is marked for close, do not attempt to package any
14012 cells for channels on that circuit. Previously, we would detect
14013 this condition lower in the call stack, when we noticed that the
14014 circuit had no attached channel, and log an annoying message.
14015 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
14017 o Minor bugfixes (scheduler):
14018 - When switching schedulers due to a consensus change, we didn't
14019 give the new scheduler a chance to react to the consensus. Fix
14020 that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
14021 - Make the KISTSchedRunInterval option a non negative value. With
14022 this, the way to disable KIST through the consensus is to set it
14023 to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
14024 - Only notice log the selected scheduler when we switch scheduler
14025 types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
14026 - Avoid a compilation warning on macOS in scheduler_ev_add() caused
14027 by a different tv_usec data type. Fixes bug 23575; bugfix
14029 - Make a hard exit if tor is unable to pick a scheduler which can
14030 happen if the user specifies a scheduler type that is not
14031 supported and not other types in Schedulers. Fixes bug 23581;
14032 bugfix on 0.3.2.1-alpha.
14033 - Properly initialize the scheduler last run time counter so it is
14034 not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
14036 o Minor bugfixes (testing):
14037 - Capture and detect several "Result does not fit" warnings in unit
14038 tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
14040 - Fix additional channelpadding unit test failures by using mocked
14041 time instead of actual time for all tests. Fixes bug 23608; bugfix
14043 - The removal of some old scheduler options caused some tests to
14044 fail on BSD systems. Assume current behavior is correct and make
14045 the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
14047 o Code simplification and refactoring:
14048 - Remove various ways of testing circuits and connections for
14049 "clientness"; instead, favor channel_is_client(). Part of
14052 o Deprecated features:
14053 - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
14054 now deprecated; they do not apply to relays, and they have had no
14055 effect on clients since 0.2.8.x. Closes ticket 19704.
14058 - HiddenServiceVersion man page entry wasn't mentioning the now
14059 supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
14060 - Clarify that the Address option is entirely about setting an
14061 advertised IPv4 address. Closes ticket 18891.
14062 - Clarify the manpage's use of the term "address" to clarify what
14063 kind of address is intended. Closes ticket 21405.
14064 - Document that onion service subdomains are allowed, and ignored.
14065 Closes ticket 18736.
14068 Changes in version 0.3.2.1-alpha - 2017-09-18
14069 Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
14070 includes support for our next-generation ("v3") onion service
14071 protocol, and adds a new circuit scheduler for more responsive
14072 forwarding decisions from relays. There are also numerous other small
14073 features and bugfixes here.
14075 Below are the changes since Tor 0.3.1.7.
14077 o Major feature (scheduler, channel):
14078 - Tor now uses new schedulers to decide which circuits should
14079 deliver cells first, in order to improve congestion at relays. The
14080 first type is called "KIST" ("Kernel Informed Socket Transport"),
14081 and is only available on Linux-like systems: it uses feedback from
14082 the kernel to prevent the kernel's TCP buffers from growing too
14083 full. The second new scheduler type is called "KISTLite": it
14084 behaves the same as KIST, but runs on systems without kernel
14085 support for inspecting TCP implementation details. The old
14086 scheduler is still available, under the name "Vanilla". To change
14087 the default scheduler preference order, use the new "Schedulers"
14088 option. (The default preference order is "KIST,KISTLite,Vanilla".)
14090 Matt Traudt implemented KIST, based on research by Rob Jansen,
14091 John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
14092 more information, see the design paper at
14093 http://www.robgjansen.com/publications/kist-sec2014.pdf and the
14094 followup implementation paper at https://arxiv.org/abs/1709.01044.
14095 Closes ticket 12541.
14097 o Major features (next-generation onion services):
14098 - Tor now supports the next-generation onion services protocol for
14099 clients and services! As part of this release, the core of
14100 proposal 224 has been implemented and is available for
14101 experimentation and testing by our users. This newer version of
14102 onion services ("v3") features many improvements over the legacy
14105 a) Better crypto (replaced SHA1/DH/RSA1024
14106 with SHA3/ed25519/curve25519)
14108 b) Improved directory protocol, leaking much less information to
14111 c) Improved directory protocol, with smaller surface for
14114 d) Better onion address security against impersonation.
14116 e) More extensible introduction/rendezvous protocol.
14118 f) A cleaner and more modular codebase.
14120 You can identify a next-generation onion address by its length:
14121 they are 56 characters long, as in
14122 "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
14124 In the future, we will release more options and features for v3
14125 onion services, but we first need a testing period, so that the
14126 current codebase matures and becomes more robust. Planned features
14127 include: offline keys, advanced client authorization, improved
14128 guard algorithms, and statistics. For full details, see
14131 Legacy ("v2") onion services will still work for the foreseeable
14132 future, and will remain the default until this new codebase gets
14133 tested and hardened. Service operators who want to experiment with
14134 the new system can use the 'HiddenServiceVersion 3' torrc
14135 directive along with the regular onion service configuration
14136 options. We will publish a blog post about this new feature
14139 o Major bugfixes (usability, control port):
14140 - Report trusted clock skew indications as bootstrap errors, so
14141 controllers can more easily alert users when their clocks are
14142 wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
14144 o Minor features (bug detection):
14145 - Log a warning message with a stack trace for any attempt to call
14146 get_options() during option validation. This pattern has caused
14147 subtle bugs in the past. Closes ticket 22281.
14149 o Minor features (client):
14150 - You can now use Tor as a tunneled HTTP proxy: use the new
14151 HTTPTunnelPort option to open a port that accepts HTTP CONNECT
14152 requests. Closes ticket 22407.
14153 - Add an extra check to make sure that we always use the newer guard
14154 selection code for picking our guards. Closes ticket 22779.
14155 - When downloading (micro)descriptors, don't split the list into
14156 multiple requests unless we want at least 32 descriptors.
14157 Previously, we split at 4, not 32, which led to significant
14158 overhead in HTTP request size and degradation in compression
14159 performance. Closes ticket 23220.
14161 o Minor features (command line):
14162 - Add a new commandline option, --key-expiration, which prints when
14163 the current signing key is going to expire. Implements ticket
14164 17639; patch by Isis Lovecruft.
14166 o Minor features (control port):
14167 - If an application tries to use the control port as an HTTP proxy,
14168 respond with a meaningful "This is the Tor control port" message,
14169 and log the event. Closes ticket 1667. Patch from Ravi
14171 - Provide better error message for GETINFO desc/(id|name) when not
14172 fetching router descriptors. Closes ticket 5847. Patch by
14174 - Add GETINFO "{desc,md}/download-enabled", to inform the controller
14175 whether Tor will try to download router descriptors and
14176 microdescriptors respectively. Closes ticket 22684.
14177 - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
14178 so controllers can tell whether the geoip databases are loaded.
14179 Closes ticket 23237.
14180 - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
14181 events. Closes ticket 19254. Patch by "DonnchaC".
14183 o Minor features (development support):
14184 - Developers can now generate a call-graph for Tor using the
14185 "calltool" python program, which post-processes object dumps. It
14186 should work okay on many Linux and OSX platforms, and might work
14187 elsewhere too. To run it, install calltool from
14188 https://gitweb.torproject.org/user/nickm/calltool.git and run
14189 "make callgraph". Closes ticket 19307.
14191 o Minor features (ed25519):
14192 - Add validation function to checks for torsion components in
14193 ed25519 public keys, used by prop224 client-side code. Closes
14194 ticket 22006. Math help by Ian Goldberg.
14196 o Minor features (exit relay, DNS):
14197 - Improve the clarity and safety of the log message from evdns when
14198 receiving an apparently spoofed DNS reply. Closes ticket 3056.
14200 o Minor features (integration, hardening):
14201 - Add a new NoExec option to prevent Tor from running other
14202 programs. When this option is set to 1, Tor will never try to run
14203 another program, regardless of the settings of
14204 PortForwardingHelper, ClientTransportPlugin, or
14205 ServerTransportPlugin. Once NoExec is set, it cannot be disabled
14206 without restarting Tor. Closes ticket 22976.
14208 o Minor features (logging):
14209 - Improve the warning message for specifying a relay by nickname.
14210 The previous message implied that nickname registration was still
14211 part of the Tor network design, which it isn't. Closes
14213 - If the sandbox filter fails to load, suggest to the user that
14214 their kernel might not support seccomp2. Closes ticket 23090.
14216 o Minor features (portability):
14217 - Check at configure time whether uint8_t is the same type as
14218 unsigned char. Lots of existing code already makes this
14219 assumption, and there could be strict aliasing issues if the
14220 assumption is violated. Closes ticket 22410.
14222 o Minor features (relay, configuration):
14223 - Reject attempts to use relative file paths when RunAsDaemon is
14224 set. Previously, Tor would accept these, but the directory-
14225 changing step of RunAsDaemon would give strange and/or confusing
14226 results. Closes ticket 22731.
14228 o Minor features (startup, safety):
14229 - When configured to write a PID file, Tor now exits if it is unable
14230 to do so. Previously, it would warn and continue. Closes
14233 o Minor features (static analysis):
14234 - The BUG() macro has been changed slightly so that Coverity no
14235 longer complains about dead code if the bug is impossible. Closes
14238 o Minor features (testing):
14239 - The default chutney network tests now include tests for the v3
14240 hidden service design. Make sure you have the latest version of
14241 chutney if you want to run these. Closes ticket 22437.
14242 - Add a unit test to verify that we can parse a hardcoded v2 hidden
14243 service descriptor. Closes ticket 15554.
14245 o Minor bugfixes (certificate handling):
14246 - Fix a time handling bug in Tor certificates set to expire after
14247 the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
14248 Coverity as CID 1415728.
14250 o Minor bugfixes (client, usability):
14251 - Refrain from needlessly rejecting SOCKS5-with-hostnames and
14252 SOCKS4a requests that contain IP address strings, even when
14253 SafeSocks in enabled, as this prevents user from connecting to
14254 known IP addresses without relying on DNS for resolving. SafeSocks
14255 still rejects SOCKS connections that connect to IP addresses when
14256 those addresses are _not_ encoded as hostnames. Fixes bug 22461;
14257 bugfix on Tor 0.2.6.2-alpha.
14259 o Minor bugfixes (code correctness):
14260 - Call htons() in extend_cell_format() for encoding a 16-bit value.
14261 Previously we used ntohs(), which happens to behave the same on
14262 all the platforms we support, but which isn't really correct.
14263 Fixes bug 23106; bugfix on 0.2.4.8-alpha.
14264 - For defense-in-depth, make the controller's write_escaped_data()
14265 function robust to extremely long inputs. Fixes bug 19281; bugfix
14266 on 0.1.1.1-alpha. Reported by Guido Vranken.
14268 o Minor bugfixes (compilation):
14269 - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
14270 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
14272 o Minor bugfixes (consensus expiry):
14273 - Check for adequate directory information correctly. Previously, Tor
14274 would reconsider whether it had sufficient directory information
14275 every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
14277 o Minor bugfixes (directory protocol):
14278 - Directory servers now include a "Date:" http header for response
14279 codes other than 200. Clients starting with a skewed clock and a
14280 recent consensus were getting "304 Not modified" responses from
14281 directory authorities, so without the Date header, the client
14282 would never hear about a wrong clock. Fixes bug 23499; bugfix
14284 - Make clients wait for 6 seconds before trying to download a
14285 consensus from an authority. Fixes bug 17750; bugfix
14288 o Minor bugfixes (DoS-resistance):
14289 - If future code asks if there are any running bridges, without
14290 checking if bridges are enabled, log a BUG warning rather than
14291 crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
14293 o Minor bugfixes (format strictness):
14294 - Restrict several data formats to decimal. Previously, the
14295 BuildTimeHistogram entries in the state file, the "bw=" entries in
14296 the bandwidth authority file, and the process IDs passed to the
14297 __OwningControllerProcess option could all be specified in hex or
14298 octal as well as in decimal. This was not an intentional feature.
14299 Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
14302 o Minor bugfixes (heartbeat):
14303 - If we fail to write a heartbeat message, schedule a retry for the
14304 minimum heartbeat interval number of seconds in the future. Fixes
14305 bug 19476; bugfix on 0.2.3.1-alpha.
14307 o Minor bugfixes (linux seccomp2 sandbox, logging):
14308 - Fix some messages on unexpected errors from the seccomp2 library.
14309 Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
14311 o Minor bugfixes (logging):
14312 - Remove duplicate log messages regarding opening non-local
14313 SocksPorts upon parsing config and opening listeners at startup.
14314 Fixes bug 4019; bugfix on 0.2.3.3-alpha.
14315 - Use a more comprehensible log message when telling the user
14316 they've excluded every running exit node. Fixes bug 7890; bugfix
14318 - When logging the number of descriptors we intend to download per
14319 directory request, do not log a number higher than then the number
14320 of descriptors we're fetching in total. Fixes bug 19648; bugfix
14322 - When warning about a directory owned by the wrong user, log the
14323 actual name of the user owning the directory. Previously, we'd log
14324 the name of the process owner twice. Fixes bug 23487; bugfix
14326 - The tor specification says hop counts are 1-based, so fix two log
14327 messages that mistakenly logged 0-based hop counts. Fixes bug
14328 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
14329 Credit to Xiaofan Li for reporting this issue.
14331 o Minor bugfixes (portability):
14332 - Stop using the PATH_MAX variable, which is not defined on GNU
14333 Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
14335 o Minor bugfixes (relay):
14336 - When uploading our descriptor for the first time after startup,
14337 report the reason for uploading as "Tor just started" rather than
14338 leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
14339 - Avoid unnecessary calls to directory_fetches_from_authorities() on
14340 relays, to prevent spurious address resolutions and descriptor
14341 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
14342 bugfix on in 0.2.8.1-alpha.
14344 o Minor bugfixes (tests):
14345 - Fix a broken unit test for the OutboundAddress option: the parsing
14346 function was never returning an error on failure. Fixes bug 23366;
14347 bugfix on 0.3.0.3-alpha.
14348 - Fix a signed-integer overflow in the unit tests for
14349 dir/download_status_random_backoff, which was untriggered until we
14350 fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
14352 o Minor bugfixes (usability, control port):
14353 - Stop making an unnecessary routerlist check in NETINFO clock skew
14354 detection; this was preventing clients from reporting NETINFO clock
14355 skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
14357 o Code simplification and refactoring:
14358 - Extract the code for handling newly-open channels into a separate
14359 function from the general code to handle channel state
14360 transitions. This change simplifies our callgraph, reducing the
14361 size of the largest strongly connected component by roughly a
14362 factor of two. Closes ticket 22608.
14363 - Remove dead code for largely unused statistics on the number of
14364 times we've attempted various public key operations. Fixes bug
14365 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
14366 - Remove several now-obsolete functions for asking about old
14367 variants directory authority status. Closes ticket 22311; patch
14369 - Remove some of the code that once supported "Named" and "Unnamed"
14370 routers. Authorities no longer vote for these flags. Closes
14372 - Rename the obsolete malleable hybrid_encrypt functions used in TAP
14373 and old hidden services, to indicate that they aren't suitable for
14374 new protocols or formats. Closes ticket 23026.
14375 - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
14376 22521. Patch from Neel Chauhan.
14377 - Split the enormous circuit_send_next_onion_skin() function into
14378 multiple subfunctions. Closes ticket 22804.
14379 - Split the portions of the buffer.c module that handle particular
14380 protocols into separate modules. Part of ticket 23149.
14381 - Use our test macros more consistently, to produce more useful
14382 error messages when our unit tests fail. Add coccinelle patches to
14383 allow us to re-check for test macro uses. Closes ticket 22497.
14385 o Deprecated features:
14386 - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
14387 only applies to direct unencrypted HTTP connections to your
14388 directory server, which your Tor probably isn't using. Closes
14392 - Clarify in the manual that "Sandbox 1" is only supported on Linux
14393 kernels. Closes ticket 22677.
14394 - Document all values of PublishServerDescriptor in the manpage.
14395 Closes ticket 15645.
14396 - Improve the documentation for the directory port part of the
14397 DirAuthority line. Closes ticket 20152.
14398 - Restore documentation for the authorities' "approved-routers"
14399 file. Closes ticket 21148.
14401 o Removed features:
14402 - The AllowDotExit option has been removed as unsafe. It has been
14403 deprecated since 0.2.9.2-alpha. Closes ticket 23426.
14404 - The ClientDNSRejectInternalAddresses flag can no longer be set on
14405 non-testing networks. It has been deprecated since 0.2.9.2-alpha.
14406 Closes ticket 21031.
14407 - The controller API no longer includes an AUTHDIR_NEWDESCS event:
14408 nobody was using it any longer. Closes ticket 22377.
14411 Changes in version 0.2.8.15 - 2017-09-18
14412 Tor 0.2.8.15 backports a collection of bugfixes from later
14415 Most significantly, it includes a fix for TROVE-2017-008, a
14416 security bug that affects hidden services running with the
14417 SafeLogging option disabled. For more information, see
14418 https://trac.torproject.org/projects/tor/ticket/23490
14420 Note that Tor 0.2.8.x will no longer be supported after 1 Jan
14421 2018. We suggest that you upgrade to the latest stable release if
14422 possible. If you can't, we recommend that you upgrade at least to
14423 0.2.9, which will be supported until 2020.
14425 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14426 - Avoid an assertion failure bug affecting our implementation of
14427 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14428 handling of "0xx" differs from what we had expected. Fixes bug
14429 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14432 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14435 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14436 - Backport a fix for an "unused variable" warning that appeared
14437 in some versions of mingw. Fixes bug 22838; bugfix on
14440 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14441 - Fix a memset() off the end of an array when packing cells. This
14442 bug should be harmless in practice, since the corrupted bytes are
14443 still in the same structure, and are always padding bytes,
14444 ignored, or immediately overwritten, depending on compiler
14445 behavior. Nevertheless, because the memset()'s purpose is to make
14446 sure that any other cell-handling bugs can't expose bytes to the
14447 network, we need to fix it. Fixes bug 22737; bugfix on
14448 0.2.4.11-alpha. Fixes CID 1401591.
14450 o Build features (backport from 0.3.1.5-alpha):
14451 - Tor's repository now includes a Travis Continuous Integration (CI)
14452 configuration file (.travis.yml). This is meant to help new
14453 developers and contributors who fork Tor to a Github repository be
14454 better able to test their changes, and understand what we expect
14455 to pass. To use this new build feature, you must fork Tor to your
14456 Github account, then go into the "Integrations" menu in the
14457 repository settings for your fork and enable Travis, then push
14458 your changes. Closes ticket 22636.
14461 Changes in version 0.2.9.12 - 2017-09-18
14462 Tor 0.2.9.12 backports a collection of bugfixes from later
14465 Most significantly, it includes a fix for TROVE-2017-008, a
14466 security bug that affects hidden services running with the
14467 SafeLogging option disabled. For more information, see
14468 https://trac.torproject.org/projects/tor/ticket/23490
14470 o Major features (security, backport from 0.3.0.2-alpha):
14471 - Change the algorithm used to decide DNS TTLs on client and server
14472 side, to better resist DNS-based correlation attacks like the
14473 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
14474 Feamster. Now relays only return one of two possible DNS TTL
14475 values, and clients are willing to believe DNS TTL values up to 3
14476 hours long. Closes ticket 19769.
14478 o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
14479 - Fix a rare crash when sending a begin cell on a circuit whose
14480 linked directory connection had already been closed. Fixes bug
14481 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
14483 o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
14484 - Fix a bug that prevented exit nodes from caching DNS records for
14485 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
14487 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
14488 - Fix a typo that had prevented TPROXY-based transparent proxying
14489 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14490 Patch from "d4fq0fQAgoJ".
14492 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14493 - Avoid an assertion failure bug affecting our implementation of
14494 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14495 handling of "0xx" differs from what we had expected. Fixes bug
14496 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14498 o Minor features (code style, backport from 0.3.1.3-alpha):
14499 - Add "Falls through" comments to our codebase, in order to silence
14500 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
14501 Stieger. Closes ticket 22446.
14503 o Minor features (geoip):
14504 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14507 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
14508 - Roll over monthly accounting at the configured hour and minute,
14509 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
14510 Found by Andrey Karpov with PVS-Studio.
14512 o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
14513 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
14514 bugfix on 0.2.8.1-alpha.
14515 - Fix warnings when building with libscrypt and openssl scrypt support
14516 on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
14517 - When building with certain versions the mingw C header files, avoid
14518 float-conversion warnings when calling the C functions isfinite(),
14519 isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
14521 o Minor bugfixes (compilation, backport from 0.3.1.7):
14522 - Avoid compiler warnings in the unit tests for running tor_sscanf()
14523 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14525 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14526 - Backport a fix for an "unused variable" warning that appeared
14527 in some versions of mingw. Fixes bug 22838; bugfix on
14530 o Minor bugfixes (controller, backport from 0.3.1.7):
14531 - Do not crash when receiving a HSPOST command with an empty body.
14532 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14533 - Do not crash when receiving a POSTDESCRIPTOR command with an
14534 empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14536 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
14537 - Avoid Coverity build warnings related to our BUG() macro. By
14538 default, Coverity treats BUG() as the Linux kernel does: an
14539 instant abort(). We need to override that so our BUG() macro
14540 doesn't prevent Coverity from analyzing functions that use it.
14541 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
14543 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14544 - Fix a memset() off the end of an array when packing cells. This
14545 bug should be harmless in practice, since the corrupted bytes are
14546 still in the same structure, and are always padding bytes,
14547 ignored, or immediately overwritten, depending on compiler
14548 behavior. Nevertheless, because the memset()'s purpose is to make
14549 sure that any other cell-handling bugs can't expose bytes to the
14550 network, we need to fix it. Fixes bug 22737; bugfix on
14551 0.2.4.11-alpha. Fixes CID 1401591.
14553 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
14554 - When setting the maximum number of connections allowed by the OS,
14555 always allow some extra file descriptors for other files. Fixes
14556 bug 22797; bugfix on 0.2.0.10-alpha.
14558 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
14559 - Avoid a sandbox failure when trying to re-bind to a socket and
14560 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14562 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
14563 - Permit the fchmod system call, to avoid crashing on startup when
14564 starting with the seccomp2 sandbox and an unexpected set of
14565 permissions on the data directory or its contents. Fixes bug
14566 22516; bugfix on 0.2.5.4-alpha.
14568 o Minor bugfixes (relay, backport from 0.3.0.5-rc):
14569 - Avoid a double-marked-circuit warning that could happen when we
14570 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
14573 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
14574 - Reject version numbers with non-numeric prefixes (such as +, -, or
14575 whitespace). Disallowing whitespace prevents differential version
14576 parsing between POSIX-based and Windows platforms. Fixes bug 21507
14577 and part of 21508; bugfix on 0.0.8pre1.
14579 o Build features (backport from 0.3.1.5-alpha):
14580 - Tor's repository now includes a Travis Continuous Integration (CI)
14581 configuration file (.travis.yml). This is meant to help new
14582 developers and contributors who fork Tor to a Github repository be
14583 better able to test their changes, and understand what we expect
14584 to pass. To use this new build feature, you must fork Tor to your
14585 Github account, then go into the "Integrations" menu in the
14586 repository settings for your fork and enable Travis, then push
14587 your changes. Closes ticket 22636.
14590 Changes in version 0.3.0.11 - 2017-09-18
14591 Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
14594 Most significantly, it includes a fix for TROVE-2017-008, a
14595 security bug that affects hidden services running with the
14596 SafeLogging option disabled. For more information, see
14597 https://trac.torproject.org/projects/tor/ticket/23490
14599 o Minor features (code style, backport from 0.3.1.7):
14600 - Add "Falls through" comments to our codebase, in order to silence
14601 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
14602 Stieger. Closes ticket 22446.
14605 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14608 o Minor bugfixes (compilation, backport from 0.3.1.7):
14609 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
14610 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14612 o Minor bugfixes (controller, backport from 0.3.1.7):
14613 - Do not crash when receiving a HSPOST command with an empty body.
14614 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14615 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
14616 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14618 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
14619 - When setting the maximum number of connections allowed by the OS,
14620 always allow some extra file descriptors for other files. Fixes
14621 bug 22797; bugfix on 0.2.0.10-alpha.
14623 o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
14624 - Remove a forgotten debugging message when an introduction point
14625 successfully establishes a hidden service prop224 circuit with
14627 - Change three other log_warn() for an introduction point to
14628 protocol warnings, because they can be failure from the network
14629 and are not relevant to the operator. Fixes bug 23078; bugfix on
14630 0.3.0.1-alpha and 0.3.0.2-alpha.
14633 Changes in version 0.3.1.7 - 2017-09-18
14634 Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
14636 With the 0.3.1 series, Tor now serves and downloads directory
14637 information in more compact formats, to save on bandwidth overhead. It
14638 also contains a new padding system to resist netflow-based traffic
14639 analysis, and experimental support for building parts of Tor in Rust
14640 (though no parts of Tor are in Rust yet). There are also numerous
14641 small features, bugfixes on earlier release series, and groundwork for
14642 the hidden services revamp of 0.3.2.
14644 This release also includes a fix for TROVE-2017-008, a security bug
14645 that affects hidden services running with the SafeLogging option
14646 disabled. For more information, see
14647 https://trac.torproject.org/projects/tor/ticket/23490
14649 Per our stable release policy, we plan to support each stable release
14650 series for at least the next nine months, or for three months after
14651 the first stable release of the next series: whichever is longer. If
14652 you need a release with long-term support, we recommend that you stay
14653 with the 0.2.9 series.
14655 Below is a list of the changes since 0.3.1.6-rc. For a list of all
14656 changes since 0.3.0, see the ReleaseNotes file.
14658 o Major bugfixes (security, hidden services, loggging):
14659 - Fix a bug where we could log uninitialized stack when a certain
14660 hidden service error occurred while SafeLogging was disabled.
14661 Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
14662 TROVE-2017-008 and CVE-2017-0380.
14664 o Minor features (defensive programming):
14665 - Create a pair of consensus parameters, nf_pad_tor2web and
14666 nf_pad_single_onion, to disable netflow padding in the consensus
14667 for non-anonymous connections in case the overhead is high. Closes
14670 o Minor features (diagnostic):
14671 - Add a stack trace to the bug warnings that can be logged when
14672 trying to send an outgoing relay cell with n_chan == 0. Diagnostic
14673 attempt for bug 23105.
14675 o Minor features (geoip):
14676 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14679 o Minor bugfixes (compilation):
14680 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
14681 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14683 o Minor bugfixes (controller):
14684 - Do not crash when receiving a HSPOST command with an empty body.
14685 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14686 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
14687 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14689 o Minor bugfixes (relay):
14690 - Inform the geoip and rephist modules about all requests, even on
14691 relays that are only fetching microdescriptors. Fixes a bug
14692 related to 21585; bugfix on 0.3.0.1-alpha.
14694 o Minor bugfixes (unit tests):
14695 - Fix a channelpadding unit test failure on slow systems by using
14696 mocked time instead of actual time. Fixes bug 23077; bugfix
14700 Changes in version 0.3.1.6-rc - 2017-09-05
14701 Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
14702 release series, including a bug that produced weird behavior on
14703 Windows directory caches.
14705 This is the first release candidate in the Tor 0.3.1 series. If we
14706 find no new bugs or regressions here, the first stable 0.3.1 release
14707 will be nearly identical to it.
14709 o Major bugfixes (windows, directory cache):
14710 - On Windows, do not try to delete cached consensus documents and
14711 diffs before they are unmapped from memory--Windows won't allow
14712 that. Instead, allow the consensus cache directory to grow larger,
14713 to hold files that might need to stay around longer. Fixes bug
14714 22752; bugfix on 0.3.1.1-alpha.
14716 o Minor features (directory authority):
14717 - Improve the message that authorities report to relays that present
14718 RSA/Ed25519 keypairs that conflict with previously pinned keys.
14719 Closes ticket 22348.
14721 o Minor features (geoip):
14722 - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
14725 o Minor features (testing):
14726 - Add more tests for compression backend initialization. Closes
14729 o Minor bugfixes (directory cache):
14730 - Fix a memory leak when recovering space in the consensus cache.
14731 Fixes bug 23139; bugfix on 0.3.1.1-alpha.
14733 o Minor bugfixes (hidden service):
14734 - Increase the number of circuits that a service is allowed to
14735 open over a specific period of time. The value was lower than it
14736 should be (8 vs 12) in the normal case of 3 introduction points.
14737 Fixes bug 22159; bugfix on 0.3.0.5-rc.
14738 - Fix a BUG warning during HSv3 descriptor decoding that could be
14739 cause by a specially crafted descriptor. Fixes bug 23233; bugfix
14740 on 0.3.0.1-alpha. Bug found by "haxxpop".
14741 - Rate-limit the log messages if we exceed the maximum number of
14742 allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
14744 o Minor bugfixes (logging, relay):
14745 - Remove a forgotten debugging message when an introduction point
14746 successfully establishes a hidden service prop224 circuit with
14748 - Change three other log_warn() for an introduction point to
14749 protocol warnings, because they can be failure from the network
14750 and are not relevant to the operator. Fixes bug 23078; bugfix on
14751 0.3.0.1-alpha and 0.3.0.2-alpha.
14753 o Minor bugfixes (relay):
14754 - When a relay is not running as a directory cache, it will no
14755 longer generate compressed consensuses and consensus diff
14756 information. Previously, this was a waste of disk and CPU. Fixes
14757 bug 23275; bugfix on 0.3.1.1-alpha.
14759 o Minor bugfixes (robustness, error handling):
14760 - Improve our handling of the cases where OpenSSL encounters a
14761 memory error while encoding keys and certificates. We haven't
14762 observed these errors in the wild, but if they do happen, we now
14763 detect and respond better. Fixes bug 19418; bugfix on all versions
14764 of Tor. Reported by Guido Vranken.
14766 o Minor bugfixes (stability):
14767 - Avoid crashing on a double-free when unable to load or process an
14768 included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
14769 with the clang static analyzer.
14771 o Minor bugfixes (testing):
14772 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
14773 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
14774 - Port the hs_ntor handshake test to work correctly with recent
14775 versions of the pysha3 module. Fixes bug 23071; bugfix
14778 o Minor bugfixes (Windows service):
14779 - When running as a Windows service, set the ID of the main thread
14780 correctly. Failure to do so made us fail to send log messages to
14781 the controller in 0.2.1.16-rc, slowed down controller event
14782 delivery in 0.2.7.3-rc and later, and crash with an assertion
14783 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
14784 Patch and diagnosis from "Vort".
14787 Changes in version 0.3.0.10 - 2017-08-02
14788 Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
14789 from the current Tor alpha series. OpenBSD users and TPROXY users
14790 should upgrade; others are probably okay sticking with 0.3.0.9.
14792 o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
14793 - Tor's repository now includes a Travis Continuous Integration (CI)
14794 configuration file (.travis.yml). This is meant to help new
14795 developers and contributors who fork Tor to a Github repository be
14796 better able to test their changes, and understand what we expect
14797 to pass. To use this new build feature, you must fork Tor to your
14798 Github account, then go into the "Integrations" menu in the
14799 repository settings for your fork and enable Travis, then push
14800 your changes. Closes ticket 22636.
14802 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
14803 - Fix a typo that had prevented TPROXY-based transparent proxying
14804 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14805 Patch from "d4fq0fQAgoJ".
14807 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14808 - Avoid an assertion failure bug affecting our implementation of
14809 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14810 handling of "0xbar" differs from what we had expected. Fixes bug
14811 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14813 o Minor features (backport from 0.3.1.5-alpha):
14814 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
14817 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
14818 - Roll over monthly accounting at the configured hour and minute,
14819 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
14820 Found by Andrey Karpov with PVS-Studio.
14822 o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
14823 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
14824 bugfix on 0.2.8.1-alpha.
14825 - Fix warnings when building with libscrypt and openssl scrypt
14826 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
14827 - When building with certain versions of the mingw C header files,
14828 avoid float-conversion warnings when calling the C functions
14829 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
14832 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14833 - Backport a fix for an "unused variable" warning that appeared
14834 in some versions of mingw. Fixes bug 22838; bugfix on
14837 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
14838 - Avoid Coverity build warnings related to our BUG() macro. By
14839 default, Coverity treats BUG() as the Linux kernel does: an
14840 instant abort(). We need to override that so our BUG() macro
14841 doesn't prevent Coverity from analyzing functions that use it.
14842 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
14844 o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
14845 - When rejecting a router descriptor for running an obsolete version
14846 of Tor without ntor support, warn about the obsolete tor version,
14847 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
14849 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
14850 - Avoid a sandbox failure when trying to re-bind to a socket and
14851 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14853 o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
14854 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
14855 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
14858 Changes in version 0.3.1.5-alpha - 2017-08-01
14859 Tor 0.3.1.5-alpha improves the performance of consensus diff
14860 calculation, fixes a crash bug on older versions of OpenBSD, and fixes
14861 several other bugs. If no serious bugs are found in this version, the
14862 next version will be a release candidate.
14864 This release also marks the end of support for the Tor 0.2.4.x,
14865 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
14866 further bug or security fixes. Anyone still running or distributing
14867 one of those versions should upgrade.
14869 o Major features (build system, continuous integration):
14870 - Tor's repository now includes a Travis Continuous Integration (CI)
14871 configuration file (.travis.yml). This is meant to help new
14872 developers and contributors who fork Tor to a Github repository be
14873 better able to test their changes, and understand what we expect
14874 to pass. To use this new build feature, you must fork Tor to your
14875 Github account, then go into the "Integrations" menu in the
14876 repository settings for your fork and enable Travis, then push
14877 your changes. Closes ticket 22636.
14879 o Major bugfixes (openbsd, denial-of-service):
14880 - Avoid an assertion failure bug affecting our implementation of
14881 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14882 handling of "0xbar" differs from what we had expected. Fixes bug
14883 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14885 o Major bugfixes (relay, performance):
14886 - Perform circuit handshake operations at a higher priority than we
14887 use for consensus diff creation and compression. This should
14888 prevent circuits from starving when a relay or bridge receives a
14889 new consensus, especially on lower-powered machines. Fixes bug
14890 22883; bugfix on 0.3.1.1-alpha.
14892 o Minor features (bridge authority):
14893 - Add "fingerprint" lines to the networkstatus-bridges file produced
14894 by bridge authorities. Closes ticket 22207.
14896 o Minor features (directory cache, consensus diff):
14897 - Add a new MaxConsensusAgeForDiffs option to allow directory cache
14898 operators with low-resource environments to adjust the number of
14899 consensuses they'll store and generate diffs from. Most cache
14900 operators should leave it unchanged. Helps to work around
14903 o Minor features (geoip):
14904 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
14907 o Minor features (relay, performance):
14908 - Always start relays with at least two worker threads, to prevent
14909 priority inversion on slow tasks. Part of the fix for bug 22883.
14910 - Allow background work to be queued with different priorities, so
14911 that a big pile of slow low-priority jobs will not starve out
14912 higher priority jobs. This lays the groundwork for a fix for
14915 o Minor bugfixes (build system, rust):
14916 - Fix a problem where Rust toolchains were not being found when
14917 building without --enable-cargo-online-mode, due to setting the
14918 $HOME environment variable instead of $CARGO_HOME. Fixes bug
14919 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
14921 o Minor bugfixes (compatibility, zstd):
14922 - Write zstd epilogues correctly when the epilogue requires
14923 reallocation of the output buffer, even with zstd 1.3.0.
14924 (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
14925 22927; bugfix on 0.3.1.1-alpha.
14927 o Minor bugfixes (compilation warnings):
14928 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
14929 22915; bugfix on 0.2.8.1-alpha.
14930 - Fix warnings when building with libscrypt and openssl scrypt
14931 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
14932 - Compile correctly when both openssl 1.1.0 and libscrypt are
14933 detected. Previously this would cause an error. Fixes bug 22892;
14934 bugfix on 0.3.1.1-alpha.
14935 - When building with certain versions of the mingw C header files,
14936 avoid float-conversion warnings when calling the C functions
14937 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
14940 o Minor bugfixes (coverity build support):
14941 - Avoid Coverity build warnings related to our BUG() macro. By
14942 default, Coverity treats BUG() as the Linux kernel does: an
14943 instant abort(). We need to override that so our BUG() macro
14944 doesn't prevent Coverity from analyzing functions that use it.
14945 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
14947 o Minor bugfixes (directory authority):
14948 - When a directory authority rejects a descriptor or extrainfo with
14949 a given digest, mark that digest as undownloadable, so that we do
14950 not attempt to download it again over and over. We previously
14951 tried to avoid downloading such descriptors by other means, but we
14952 didn't notice if we accidentally downloaded one anyway. This
14953 behavior became problematic in 0.2.7.2-alpha, when authorities
14954 began pinning Ed25519 keys. Fixes bug 22349; bugfix
14957 o Minor bugfixes (error reporting, windows):
14958 - When formatting Windows error messages, use the English format to
14959 avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
14962 o Minor bugfixes (file limits, osx):
14963 - When setting the maximum number of connections allowed by the OS,
14964 always allow some extra file descriptors for other files. Fixes
14965 bug 22797; bugfix on 0.2.0.10-alpha.
14967 o Minor bugfixes (linux seccomp2 sandbox):
14968 - Avoid a sandbox failure when trying to re-bind to a socket and
14969 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14971 o Minor bugfixes (memory leaks):
14972 - Fix a small memory leak when validating a configuration that uses
14973 two or more AF_UNIX sockets for the same port type. Fixes bug
14974 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
14976 o Minor bugfixes (unit tests):
14977 - test_consdiff_base64cmp would fail on OS X because while OS X
14978 follows the standard of (less than zero/zero/greater than zero),
14979 it doesn't follow the convention of (-1/0/+1). Make the test
14980 comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
14981 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
14982 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
14985 Changes in version 0.3.1.4-alpha - 2017-06-29
14986 Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
14987 to use a guard that was in the same network family as a chosen exit
14988 relay. This is a security regression; all clients running earlier
14989 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
14992 This release also fixes several other bugs introduced in 0.3.0.x
14993 and 0.3.1.x, including others that can affect bandwidth usage
14996 o New dependencies:
14997 - To build with zstd and lzma support, Tor now requires the
14998 pkg-config tool at build time. (This requirement was new in
14999 0.3.1.1-alpha, but was not noted at the time. Noting it here to
15000 close ticket 22623.)
15002 o Major bugfixes (path selection, security):
15003 - When choosing which guard to use for a circuit, avoid the exit's
15004 family along with the exit itself. Previously, the new guard
15005 selection logic avoided the exit, but did not consider its family.
15006 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
15007 006 and CVE-2017-0377.
15009 o Major bugfixes (compression, zstd):
15010 - Correctly detect a full buffer when decompressing a large zstd-
15011 compressed input. Previously, we would sometimes treat a full
15012 buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
15014 o Major bugfixes (directory protocol):
15015 - Ensure that we send "304 Not modified" as HTTP status code when a
15016 client is attempting to fetch a consensus or consensus diff, and
15017 the best one we can send them is one they already have. Fixes bug
15018 22702; bugfix on 0.3.1.1-alpha.
15020 o Major bugfixes (entry guards):
15021 - When starting with an old consensus, do not add new entry guards
15022 unless the consensus is "reasonably live" (under 1 day old). Fixes
15023 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
15025 o Minor features (bug mitigation, diagnostics, logging):
15026 - Avoid an assertion failure, and log a better error message, when
15027 unable to remove a file from the consensus cache on Windows.
15028 Attempts to mitigate and diagnose bug 22752.
15030 o Minor features (geoip):
15031 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
15034 o Minor bugfixes (compression):
15035 - When compressing or decompressing a buffer, check for a failure to
15036 create a compression object. Fixes bug 22626; bugfix
15038 - When decompressing a buffer, check for extra data after the end of
15039 the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
15040 - When decompressing an object received over an anonymous directory
15041 connection, if we have already decompressed it using an acceptable
15042 compression method, do not reject it for looking like an
15043 unacceptable compression method. Fixes part of bug 22670; bugfix
15045 - When serving directory votes compressed with zlib, do not claim to
15046 have compressed them with zstd. Fixes bug 22669; bugfix
15048 - When spooling compressed data to an output buffer, don't try to
15049 spool more data when there is no more data to spool and we are not
15050 trying to flush the input. Previously, we would sometimes launch
15051 compression requests with nothing to do, which interferes with our
15052 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
15054 o Minor bugfixes (defensive programming):
15055 - Detect and break out of infinite loops in our compression code. We
15056 don't think that any such loops exist now, but it's best to be
15057 safe. Closes ticket 22672.
15058 - Fix a memset() off the end of an array when packing cells. This
15059 bug should be harmless in practice, since the corrupted bytes are
15060 still in the same structure, and are always padding bytes,
15061 ignored, or immediately overwritten, depending on compiler
15062 behavior. Nevertheless, because the memset()'s purpose is to make
15063 sure that any other cell-handling bugs can't expose bytes to the
15064 network, we need to fix it. Fixes bug 22737; bugfix on
15065 0.2.4.11-alpha. Fixes CID 1401591.
15067 o Minor bugfixes (linux seccomp2 sandbox):
15068 - Permit the fchmod system call, to avoid crashing on startup when
15069 starting with the seccomp2 sandbox and an unexpected set of
15070 permissions on the data directory or its contents. Fixes bug
15071 22516; bugfix on 0.2.5.4-alpha.
15072 - Fix a crash in the LZMA module, when the sandbox was enabled, and
15073 liblzma would allocate more than 16 MB of memory. We solve this by
15074 bumping the mprotect() limit in the sandbox module from 16 MB to
15075 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
15077 o Minor bugfixes (logging):
15078 - When decompressing, do not warn if we fail to decompress using a
15079 compression method that we merely guessed. Fixes part of bug
15080 22670; bugfix on 0.1.1.14-alpha.
15081 - When decompressing, treat mismatch between content-encoding and
15082 actual compression type as a protocol warning. Fixes part of bug
15083 22670; bugfix on 0.1.1.9-alpha.
15084 - Downgrade "assigned_to_cpuworker failed" message to info-level
15085 severity. In every case that can reach it, either a better warning
15086 has already been logged, or no warning is warranted. Fixes bug
15087 22356; bugfix on 0.2.6.3-alpha.
15088 - Demote a warn that was caused by libevent delays to info if
15089 netflow padding is less than 4.5 seconds late, or to notice
15090 if it is more (4.5 seconds is the amount of time that a netflow
15091 record might be emitted after, if we chose the maximum timeout).
15092 Fixes bug 22212; bugfix on 0.3.1.1-alpha.
15094 o Minor bugfixes (process behavior):
15095 - When exiting because of an error, always exit with a nonzero exit
15096 status. Previously, we would fail to report an error in our exit
15097 status in cases related to __OwningControllerProcess failure,
15098 lockfile contention, and Ed25519 key initialization. Fixes bug
15099 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
15100 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
15104 - Add a manpage description for the key-pinning-journal file. Closes
15106 - Correctly note that bandwidth accounting values are stored in the
15107 state file, and the bw_accounting file is now obsolete. Closes
15109 - Document more of the files in the Tor data directory, including
15110 cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
15111 approved-routers, sr-random, and diff-cache. Found while fixing
15115 Changes in version 0.3.0.9 - 2017-06-29
15116 Tor 0.3.0.9 fixes a path selection bug that would allow a client
15117 to use a guard that was in the same network family as a chosen exit
15118 relay. This is a security regression; all clients running earlier
15119 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
15122 This release also backports several other bugfixes from the 0.3.1.x
15125 o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
15126 - When choosing which guard to use for a circuit, avoid the exit's
15127 family along with the exit itself. Previously, the new guard
15128 selection logic avoided the exit, but did not consider its family.
15129 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
15130 006 and CVE-2017-0377.
15132 o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
15133 - Don't block bootstrapping when a primary bridge is offline and we
15134 can't get its descriptor. Fixes bug 22325; fixes one case of bug
15135 21969; bugfix on 0.3.0.3-alpha.
15137 o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
15138 - When starting with an old consensus, do not add new entry guards
15139 unless the consensus is "reasonably live" (under 1 day old). Fixes
15140 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
15142 o Minor features (geoip):
15143 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
15146 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
15147 - Reject version numbers with non-numeric prefixes (such as +, -, or
15148 whitespace). Disallowing whitespace prevents differential version
15149 parsing between POSIX-based and Windows platforms. Fixes bug 21507
15150 and part of 21508; bugfix on 0.0.8pre1.
15152 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
15153 - Permit the fchmod system call, to avoid crashing on startup when
15154 starting with the seccomp2 sandbox and an unexpected set of
15155 permissions on the data directory or its contents. Fixes bug
15156 22516; bugfix on 0.2.5.4-alpha.
15158 o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
15159 - Fix a memset() off the end of an array when packing cells. This
15160 bug should be harmless in practice, since the corrupted bytes are
15161 still in the same structure, and are always padding bytes,
15162 ignored, or immediately overwritten, depending on compiler
15163 behavior. Nevertheless, because the memset()'s purpose is to make
15164 sure that any other cell-handling bugs can't expose bytes to the
15165 network, we need to fix it. Fixes bug 22737; bugfix on
15166 0.2.4.11-alpha. Fixes CID 1401591.
15169 Changes in version 0.3.1.3-alpha - 2017-06-08
15170 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
15171 remotely crash a hidden service with an assertion failure. Anyone
15172 running a hidden service should upgrade to this version, or to some
15173 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
15175 Tor 0.3.1.3-alpha also includes fixes for several key management bugs
15176 that sometimes made relays unreliable, as well as several other
15177 bugfixes described below.
15179 o Major bugfixes (hidden service, relay, security):
15180 - Fix a remotely triggerable assertion failure when a hidden service
15181 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
15182 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
15183 - Fix a remotely triggerable assertion failure caused by receiving a
15184 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15185 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15188 o Major bugfixes (relay, link handshake):
15189 - When performing the v3 link handshake on a TLS connection, report
15190 that we have the x509 certificate that we actually used on that
15191 connection, even if we have changed certificates since that
15192 connection was first opened. Previously, we would claim to have
15193 used our most recent x509 link certificate, which would sometimes
15194 make the link handshake fail. Fixes one case of bug 22460; bugfix
15197 o Major bugfixes (relays, key management):
15198 - Regenerate link and authentication certificates whenever the key
15199 that signs them changes; also, regenerate link certificates
15200 whenever the signed key changes. Previously, these processes were
15201 only weakly coupled, and we relays could (for minutes to hours)
15202 wind up with an inconsistent set of keys and certificates, which
15203 other relays would not accept. Fixes two cases of bug 22460;
15204 bugfix on 0.3.0.1-alpha.
15205 - When sending an Ed25519 signing->link certificate in a CERTS cell,
15206 send the certificate that matches the x509 certificate that we
15207 used on the TLS connection. Previously, there was a race condition
15208 if the TLS context rotated after we began the TLS handshake but
15209 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
15212 o Major bugfixes (torrc, crash):
15213 - Fix a crash bug when using %include in torrc. Fixes bug 22417;
15214 bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
15216 o Minor features (code style):
15217 - Add "Falls through" comments to our codebase, in order to silence
15218 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
15219 Stieger. Closes ticket 22446.
15221 o Minor features (diagnostic):
15222 - Add logging messages to try to diagnose a rare bug that seems to
15223 generate RSA->Ed25519 cross-certificates dated in the 1970s. We
15224 think this is happening because of incorrect system clocks, but
15225 we'd like to know for certain. Diagnostic for bug 22466.
15227 o Minor bugfixes (correctness):
15228 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15229 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15231 o Minor bugfixes (directory protocol):
15232 - Check for libzstd >= 1.1, because older versions lack the
15233 necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
15235 o Minor bugfixes (link handshake):
15236 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
15237 months, and regenerate it when it is within one month of expiring.
15238 Previously, we had generated this certificate at startup with a
15239 ten-year lifetime, but that could lead to weird behavior when Tor
15240 was started with a grossly inaccurate clock. Mitigates bug 22466;
15241 mitigation on 0.3.0.1-alpha.
15243 o Minor bugfixes (storage directories):
15244 - Always check for underflows in the cached storage directory usage.
15245 If the usage does underflow, re-calculate it. Also, avoid a
15246 separate underflow when the usage is not known. Fixes bug 22424;
15247 bugfix on 0.3.1.1-alpha.
15249 o Minor bugfixes (unit tests):
15250 - The unit tests now pass on systems where localhost is misconfigured
15251 to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
15255 - Clarify the manpage for the (deprecated) torify script. Closes
15258 Changes in version 0.3.0.8 - 2017-06-08
15259 Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
15260 remotely crash a hidden service with an assertion failure. Anyone
15261 running a hidden service should upgrade to this version, or to some
15262 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
15264 Tor 0.3.0.8 also includes fixes for several key management bugs
15265 that sometimes made relays unreliable, as well as several other
15266 bugfixes described below.
15268 o Major bugfixes (hidden service, relay, security, backport
15269 from 0.3.1.3-alpha):
15270 - Fix a remotely triggerable assertion failure when a hidden service
15271 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
15272 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
15273 - Fix a remotely triggerable assertion failure caused by receiving a
15274 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15275 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15278 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
15279 - When performing the v3 link handshake on a TLS connection, report
15280 that we have the x509 certificate that we actually used on that
15281 connection, even if we have changed certificates since that
15282 connection was first opened. Previously, we would claim to have
15283 used our most recent x509 link certificate, which would sometimes
15284 make the link handshake fail. Fixes one case of bug 22460; bugfix
15287 o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
15288 - Regenerate link and authentication certificates whenever the key
15289 that signs them changes; also, regenerate link certificates
15290 whenever the signed key changes. Previously, these processes were
15291 only weakly coupled, and we relays could (for minutes to hours)
15292 wind up with an inconsistent set of keys and certificates, which
15293 other relays would not accept. Fixes two cases of bug 22460;
15294 bugfix on 0.3.0.1-alpha.
15295 - When sending an Ed25519 signing->link certificate in a CERTS cell,
15296 send the certificate that matches the x509 certificate that we
15297 used on the TLS connection. Previously, there was a race condition
15298 if the TLS context rotated after we began the TLS handshake but
15299 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
15302 o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
15303 - Stop rejecting v3 hidden service descriptors because their size
15304 did not match an old padding rule. Fixes bug 22447; bugfix on
15307 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15308 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15309 December 2016 (of which ~126 were still functional) with a list of
15310 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15311 2017. Resolves ticket 21564.
15313 o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
15314 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
15315 bug 22252; bugfix on 0.2.9.3-alpha.
15317 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
15318 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15319 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15321 o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
15322 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
15323 months, and regenerate it when it is within one month of expiring.
15324 Previously, we had generated this certificate at startup with a
15325 ten-year lifetime, but that could lead to weird behavior when Tor
15326 was started with a grossly inaccurate clock. Mitigates bug 22466;
15327 mitigation on 0.3.0.1-alpha.
15329 o Minor bugfixes (memory leak, directory authority, backport from
15331 - When directory authorities reject a router descriptor due to
15332 keypinning, free the router descriptor rather than leaking the
15333 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15336 Changes in version 0.2.9.11 - 2017-06-08
15337 Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
15338 remotely crash a hidden service with an assertion failure. Anyone
15339 running a hidden service should upgrade to this version, or to some
15340 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15341 are not affected by TROVE-2017-004.)
15343 Tor 0.2.9.11 also backports fixes for several key management bugs
15344 that sometimes made relays unreliable, as well as several other
15345 bugfixes described below.
15347 o Major bugfixes (hidden service, relay, security, backport
15348 from 0.3.1.3-alpha):
15349 - Fix a remotely triggerable assertion failure caused by receiving a
15350 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15351 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15354 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
15355 - When performing the v3 link handshake on a TLS connection, report
15356 that we have the x509 certificate that we actually used on that
15357 connection, even if we have changed certificates since that
15358 connection was first opened. Previously, we would claim to have
15359 used our most recent x509 link certificate, which would sometimes
15360 make the link handshake fail. Fixes one case of bug 22460; bugfix
15363 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15364 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15365 December 2016 (of which ~126 were still functional) with a list of
15366 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15367 2017. Resolves ticket 21564.
15369 o Minor features (future-proofing, backport from 0.3.0.7):
15370 - Tor no longer refuses to download microdescriptors or descriptors if
15371 they are listed as "published in the future". This change will
15372 eventually allow us to stop listing meaningful "published" dates
15373 in microdescriptor consensuses, and thereby allow us to reduce the
15374 resources required to download consensus diffs by over 50%.
15375 Implements part of ticket 21642; implements part of proposal 275.
15377 o Minor features (directory authorities, backport from 0.3.0.4-rc)
15378 - Directory authorities now reject relays running versions
15379 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
15380 suffer from bug 20499 and don't keep their consensus cache
15381 up-to-date. Resolves ticket 20509.
15383 o Minor features (geoip):
15384 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15387 o Minor bugfixes (control port, backport from 0.3.0.6):
15388 - The GETINFO extra-info/digest/<digest> command was broken because
15389 of a wrong base16 decode return value check, introduced when
15390 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
15392 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
15393 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15394 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15396 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
15397 - The getpid() system call is now permitted under the Linux seccomp2
15398 sandbox, to avoid crashing with versions of OpenSSL (and other
15399 libraries) that attempt to learn the process's PID by using the
15400 syscall rather than the VDSO code. Fixes bug 21943; bugfix
15403 o Minor bugfixes (memory leak, directory authority, backport
15404 from 0.3.1.2-alpha):
15405 - When directory authorities reject a router descriptor due to
15406 keypinning, free the router descriptor rather than leaking the
15407 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15409 Changes in version 0.2.8.14 - 2017-06-08
15410 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
15411 remotely crash a hidden service with an assertion failure. Anyone
15412 running a hidden service should upgrade to this version, or to some
15413 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15414 are not affected by TROVE-2017-004.)
15416 o Major bugfixes (hidden service, relay, security):
15417 - Fix a remotely triggerable assertion failure caused by receiving a
15418 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15419 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15422 o Minor features (geoip):
15423 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15426 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15427 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15428 December 2016 (of which ~126 were still functional) with a list of
15429 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15430 2017. Resolves ticket 21564.
15432 o Minor bugfixes (correctness):
15433 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15434 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15436 Changes in version 0.2.7.8 - 2017-06-08
15437 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
15438 remotely crash a hidden service with an assertion failure. Anyone
15439 running a hidden service should upgrade to this version, or to some
15440 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15441 are not affected by TROVE-2017-004.)
15443 o Major bugfixes (hidden service, relay, security):
15444 - Fix a remotely triggerable assertion failure caused by receiving a
15445 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15446 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15449 o Minor features (geoip):
15450 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15453 o Minor bugfixes (correctness):
15454 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15455 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15458 Changes in version 0.2.6.12 - 2017-06-08
15459 Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
15460 remotely crash a hidden service with an assertion failure. Anyone
15461 running a hidden service should upgrade to this version, or to some
15462 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15463 are not affected by TROVE-2017-004.)
15465 o Major bugfixes (hidden service, relay, security):
15466 - Fix a remotely triggerable assertion failure caused by receiving a
15467 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15468 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15471 o Minor features (geoip):
15472 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15475 o Minor bugfixes (correctness):
15476 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15477 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15479 Changes in version 0.2.5.14 - 2017-06-08
15480 Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
15481 remotely crash a hidden service with an assertion failure. Anyone
15482 running a hidden service should upgrade to this version, or to some
15483 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15484 are not affected by TROVE-2017-004.)
15486 o Major bugfixes (hidden service, relay, security):
15487 - Fix a remotely triggerable assertion failure caused by receiving a
15488 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15489 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15492 o Minor features (geoip):
15493 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15496 o Minor bugfixes (correctness):
15497 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15498 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15500 Changes in version 0.2.4.29 - 2017-06-08
15501 Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
15502 remotely crash a hidden service with an assertion failure. Anyone
15503 running a hidden service should upgrade to this version, or to some
15504 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15505 are not affected by TROVE-2017-004.)
15507 o Major bugfixes (hidden service, relay, security):
15508 - Fix a remotely triggerable assertion failure caused by receiving a
15509 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15510 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15513 o Minor features (geoip):
15514 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15517 o Minor bugfixes (correctness):
15518 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15519 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15522 Changes in version 0.3.1.2-alpha - 2017-05-26
15523 Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
15524 fixes a few bugs found while testing 0.3.1.1-alpha, including a
15525 memory corruption bug that affected relay stability.
15527 o Major bugfixes (crash, relay):
15528 - Fix a memory-corruption bug in relays that set MyFamily.
15529 Previously, they would double-free MyFamily elements when making
15530 the next descriptor or when changing their configuration. Fixes
15531 bug 22368; bugfix on 0.3.1.1-alpha.
15533 o Minor bugfixes (logging):
15534 - Log a better message when a directory authority replies to an
15535 upload with an unexpected status code. Fixes bug 11121; bugfix
15538 o Minor bugfixes (memory leak, directory authority):
15539 - When directory authorities reject a router descriptor due to
15540 keypinning, free the router descriptor rather than leaking the
15541 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15544 Changes in version 0.3.1.1-alpha - 2017-05-22
15545 Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
15546 reduces the bandwidth usage for Tor's directory protocol, adds some
15547 basic padding to resist netflow-based traffic analysis and to serve as
15548 the basis of other padding in the future, and adds rust support to the
15551 It also contains numerous other small features and improvements to
15552 security, correctness, and performance.
15554 Below are the changes since 0.3.0.7.
15556 o Major features (directory protocol):
15557 - Tor relays and authorities can now serve clients an abbreviated
15558 version of the consensus document, containing only the changes
15559 since an older consensus document that the client holds. Clients
15560 now request these documents when available. When both client and
15561 server use this new protocol, they will use far less bandwidth (up
15562 to 94% less) to keep the client's consensus up-to-date. Implements
15563 proposal 140; closes ticket 13339. Based on work by Daniel Martí.
15564 - Tor can now compress directory traffic with lzma or with zstd
15565 compression algorithms, which can deliver better bandwidth
15566 performance. Because lzma is computationally expensive, it's only
15567 used for documents that can be compressed once and served many
15568 times. Support for these algorithms requires that tor is built
15569 with the libzstd and/or liblzma libraries available. Implements
15570 proposal 278; closes ticket 21662.
15571 - Relays now perform the more expensive compression operations, and
15572 consensus diff generation, in worker threads. This separation
15573 avoids delaying the main thread when a new consensus arrives.
15575 o Major features (experimental):
15576 - Tor can now build modules written in Rust. To turn this on, pass
15577 the "--enable-rust" flag to the configure script. It's not time to
15578 get excited yet: currently, there is no actual Rust functionality
15579 beyond some simple glue code, and a notice at startup to tell you
15580 that Rust is running. Still, we hope that programmers and
15581 packagers will try building Tor with Rust support, so that we can
15582 find issues and solve portability problems. Closes ticket 22106.
15584 o Major features (traffic analysis resistance):
15585 - Connections between clients and relays now send a padding cell in
15586 each direction every 1.5 to 9.5 seconds (tunable via consensus
15587 parameters). This padding will not resist specialized
15588 eavesdroppers, but it should be enough to make many ISPs' routine
15589 network flow logging less useful in traffic analysis against
15592 Padding is negotiated using Tor's link protocol, so both relays
15593 and clients must upgrade for this to take effect. Clients may
15594 still send padding despite the relay's version by setting
15595 ConnectionPadding 1 in torrc, and may disable padding by setting
15596 ConnectionPadding 0 in torrc. Padding may be minimized for mobile
15597 users with the torrc option ReducedConnectionPadding. Implements
15598 Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
15599 - Relays will publish 24 hour totals of padding and non-padding cell
15600 counts to their extra-info descriptors, unless PaddingStatistics 0
15601 is set in torrc. These 24 hour totals are also rounded to
15602 multiples of 10000.
15604 o Major bugfixes (connection usage):
15605 - We use NETINFO cells to try to determine if both relays involved
15606 in a connection will agree on the canonical status of that
15607 connection. We prefer the connections where this is the case for
15608 extend cells, and try to close connections where relays disagree
15609 on their canonical status early. Also, we now prefer the oldest
15610 valid connection for extend cells. These two changes should reduce
15611 the number of long-term connections that are kept open between
15612 relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
15613 - Relays now log hourly statistics (look for
15614 "channel_check_for_duplicates" lines) on the total number of
15615 connections to other relays. If the number of connections per
15616 relay is unexpectedly large, this log message is at notice level.
15617 Otherwise it is at info.
15619 o Major bugfixes (entry guards):
15620 - Don't block bootstrapping when a primary bridge is offline and we
15621 can't get its descriptor. Fixes bug 22325; fixes one case of bug
15622 21969; bugfix on 0.3.0.3-alpha.
15624 o Major bugfixes (linux TPROXY support):
15625 - Fix a typo that had prevented TPROXY-based transparent proxying
15626 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
15627 Patch from "d4fq0fQAgoJ".
15629 o Minor features (security, windows):
15630 - Enable a couple of pieces of Windows hardening: one
15631 (HeapEnableTerminationOnCorruption) that has been on-by-default
15632 since Windows 8, and unavailable before Windows 7; and one
15633 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
15634 affect us, but shouldn't do any harm. Closes ticket 21953.
15636 o Minor features (config options):
15637 - Allow "%include" directives in torrc configuration files. These
15638 directives import the settings from other files, or from all the
15639 files in a directory. Closes ticket 1922. Code by Daniel Pinto.
15640 - Make SAVECONF return an error when overwriting a torrc that has
15641 includes. Using SAVECONF with the FORCE option will allow it to
15642 overwrite torrc even if includes are used. Related to ticket 1922.
15643 - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
15644 will work without the FORCE option. Related to ticket 1922.
15646 o Minor features (controller):
15647 - Warn the first time that a controller requests data in the long-
15648 deprecated 'GETINFO network-status' format. Closes ticket 21703.
15650 o Minor features (defaults):
15651 - The default value for UseCreateFast is now 0: clients which
15652 haven't yet received a consensus document will now use a proper
15653 ntor handshake to talk to their directory servers whenever they
15654 can. Closes ticket 21407.
15655 - Onion key rotation and expiry intervals are now defined as a
15656 network consensus parameter, per proposal 274. The default
15657 lifetime of an onion key is increased from 7 to 28 days. Old onion
15658 keys will expire after 7 days by default. This change will make
15659 consensus diffs much smaller, and save significant bandwidth.
15660 Closes ticket 21641.
15662 o Minor features (fallback directory list):
15663 - Update the fallback directory mirror whitelist and blacklist based
15664 on operator emails. Closes task 21121.
15665 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15666 December 2016 (of which ~126 were still functional) with a list of
15667 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15668 2017. Resolves ticket 21564.
15670 o Minor features (hidden services, logging):
15671 - Log a message when a hidden service descriptor has fewer
15672 introduction points than specified in
15673 HiddenServiceNumIntroductionPoints. Closes tickets 21598.
15674 - Log a message when a hidden service reaches its introduction point
15675 circuit limit, and when that limit is reset. Follow up to ticket
15676 21594; closes ticket 21622.
15677 - Warn user if multiple entries in EntryNodes and at least one
15678 HiddenService are used together. Pinning EntryNodes along with a
15679 hidden service can be possibly harmful; for instance see ticket
15680 14917 or 21155. Closes ticket 21155.
15682 o Minor features (linux seccomp2 sandbox):
15683 - We now have a document storage backend compatible with the Linux
15684 seccomp2 sandbox. This backend is used for consensus documents and
15685 diffs between them; in the long term, we'd like to use it for
15686 unparseable directory material too. Closes ticket 21645
15687 - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
15688 from 1MB to 16MB. This was necessary with the glibc allocator in
15689 order to allow worker threads to allocate more memory -- which in
15690 turn is necessary because of our new use of worker threads for
15691 compression. Closes ticket 22096.
15693 o Minor features (logging):
15694 - Log files are no longer created world-readable by default.
15695 (Previously, most distributors would store the logs in a non-
15696 world-readable location to prevent inappropriate access. This
15697 change is an extra precaution.) Closes ticket 21729; patch
15700 o Minor features (performance):
15701 - Our Keccak (SHA-3) implementation now accesses memory more
15702 efficiently, especially on little-endian systems. Closes
15704 - Add an O(1) implementation of channel_find_by_global_id(), to
15705 speed some controller functions.
15707 o Minor features (relay, configuration):
15708 - The MyFamily option may now be repeated as many times as desired,
15709 for relays that want to configure large families. Closes ticket
15710 4998; patch by Daniel Pinto.
15712 o Minor features (safety):
15713 - Add an explicit check to extrainfo_parse_entry_from_string() for
15714 NULL inputs. We don't believe this can actually happen, but it may
15715 help silence a warning from the Clang analyzer. Closes
15718 o Minor features (testing):
15719 - Add a "--disable-memory-sentinels" feature to help with fuzzing.
15720 When Tor is compiled with this option, we disable a number of
15721 redundant memory-safety failsafes that are intended to stop bugs
15722 from becoming security issues. This makes it easier to hunt for
15723 bugs that would be security issues without the failsafes turned
15724 on. Closes ticket 21439.
15725 - Add a general event-tracing instrumentation support to Tor. This
15726 subsystem will enable developers and researchers to add fine-
15727 grained instrumentation to their Tor instances, for use when
15728 examining Tor network performance issues. There are no trace
15729 events yet, and event-tracing is off by default unless enabled at
15730 compile time. Implements ticket 13802.
15731 - Improve our version parsing tests: add tests for typical version
15732 components, add tests for invalid versions, including numeric
15733 range and non-numeric prefixes. Unit tests 21278, 21450, and
15734 21507. Partially implements 21470.
15736 o Minor bugfixes (bandwidth accounting):
15737 - Roll over monthly accounting at the configured hour and minute,
15738 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
15739 Found by Andrey Karpov with PVS-Studio.
15741 o Minor bugfixes (code correctness):
15742 - Accurately identify client connections by their lack of peer
15743 authentication. This means that we bail out earlier if asked to
15744 extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
15747 o Minor bugfixes (configuration):
15748 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
15749 bug 22252; bugfix on 0.2.9.3-alpha.
15751 o Minor bugfixes (connection lifespan):
15752 - Allow more control over how long TLS connections are kept open:
15753 unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
15754 single option called CircuitsAvailableTimeout. Also, allow the
15755 consensus to control the default values for both this preference
15756 and the lifespan of relay-to-relay connections. Fixes bug 17592;
15757 bugfix on 0.2.5.5-alpha.
15758 - Increase the initial circuit build timeout testing frequency, to
15759 help ensure that ReducedConnectionPadding clients finish learning
15760 a timeout before their orconn would expire. The initial testing
15761 rate was set back in the days of TAP and before the Tor Browser
15762 updater, when we had to be much more careful about new clients
15763 making lots of circuits. With this change, a circuit build timeout
15764 is learned in about 15-20 minutes, instead of 100-120 minutes.
15766 o Minor bugfixes (controller):
15767 - GETINFO onions/current and onions/detached no longer respond with
15768 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
15769 - Trigger HS descriptor events on the control port when the client
15770 fails to pick a hidden service directory for a hidden service.
15771 This can happen if all the hidden service directories are in
15772 ExcludeNodes, or they have all been queried within the last 15
15773 minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
15775 o Minor bugfixes (directory authority):
15776 - When rejecting a router descriptor for running an obsolete version
15777 of Tor without ntor support, warn about the obsolete tor version,
15778 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
15779 - Prevent the shared randomness subsystem from asserting when
15780 initialized by a bridge authority with an incomplete configuration
15781 file. Fixes bug 21586; bugfix on 0.2.9.8.
15783 o Minor bugfixes (exit-side DNS):
15784 - Fix an untriggerable assertion that checked the output of a
15785 libevent DNS error, so that the assertion actually behaves as
15786 expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
15787 Karpov using PVS-Studio.
15789 o Minor bugfixes (fallback directories):
15790 - Make the usage example in updateFallbackDirs.py actually work, and
15791 explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
15792 - Decrease the guard flag average required to be a fallback. This
15793 allows us to keep relays that have their guard flag removed when
15794 they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
15795 - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
15796 bugfix on 0.2.8.1-alpha.
15797 - Make sure fallback directory mirrors have the same address, port,
15798 and relay identity key for at least 30 days before they are
15799 selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
15801 o Minor bugfixes (hidden services):
15802 - Stop printing a cryptic warning when a hidden service gets a
15803 request to connect to a virtual port that it hasn't configured.
15804 Fixes bug 16706; bugfix on 0.2.6.3-alpha.
15805 - Simplify hidden service descriptor creation by using an existing
15806 flag to check if an introduction point is established. Fixes bug
15807 21599; bugfix on 0.2.7.2-alpha.
15809 o Minor bugfixes (memory leak):
15810 - Fix a small memory leak at exit from the backtrace handler code.
15811 Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
15813 o Minor bugfixes (protocol, logging):
15814 - Downgrade a log statement about unexpected relay cells from "bug"
15815 to "protocol warning", because there is at least one use case
15816 where it can be triggered by a buggy tor implementation. Fixes bug
15817 21293; bugfix on 0.1.1.14-alpha.
15819 o Minor bugfixes (testing):
15820 - Use unbuffered I/O for utility functions around the
15821 process_handle_t type. This fixes unit test failures reported on
15822 OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
15823 - Make display of captured unit test log messages consistent. Fixes
15824 bug 21510; bugfix on 0.2.9.3-alpha.
15825 - Make test-network.sh always call chutney's test-network.sh.
15826 Previously, this only worked on systems which had bash installed,
15827 due to some bash-specific code in the script. Fixes bug 19699;
15828 bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
15830 o Minor bugfixes (voting consistency):
15831 - Reject version numbers with non-numeric prefixes (such as +, -, or
15832 whitespace). Disallowing whitespace prevents differential version
15833 parsing between POSIX-based and Windows platforms. Fixes bug 21507
15834 and part of 21508; bugfix on 0.0.8pre1.
15836 o Minor bugfixes (windows, relay):
15837 - Resolve "Failure from drain_fd: No error" warnings on Windows
15838 relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
15840 o Code simplification and refactoring:
15841 - Break up the 630-line function connection_dir_client_reached_eof()
15842 into a dozen smaller functions. This change should help
15843 maintainability and readability of the client directory code.
15844 - Isolate our use of the openssl headers so that they are only
15845 included from our crypto wrapper modules, and from tests that
15846 examine those modules' internals. Closes ticket 21841.
15847 - Simplify our API to launch directory requests, making it more
15848 extensible and less error-prone. Now it's easier to add extra
15849 headers to directory requests. Closes ticket 21646.
15850 - Our base64 decoding functions no longer overestimate the output
15851 space that they need when parsing unpadded inputs. Closes
15853 - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
15854 Resolves ticket 22213.
15855 - The logic that directory caches use to spool request to clients,
15856 serving them one part at a time so as not to allocate too much
15857 memory, has been refactored for consistency. Previously there was
15858 a separate spooling implementation per type of spoolable data. Now
15859 there is one common spooling implementation, with extensible data
15860 types. Closes ticket 21651.
15861 - Tor's compression module now supports multiple backends. Part of
15862 the implementation for proposal 278; closes ticket 21663.
15865 - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
15866 Closes ticket 21873.
15867 - Correct documentation about the default DataDirectory value.
15868 Closes ticket 21151.
15869 - Document the default behavior of NumEntryGuards and
15870 NumDirectoryGuards correctly. Fixes bug 21715; bugfix
15872 - Document key=value pluggable transport arguments for Bridge lines
15873 in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
15874 - Note that bandwidth-limiting options don't affect TCP headers or
15875 DNS. Closes ticket 17170.
15877 o Removed features (configuration options, all in ticket 22060):
15878 - These configuration options are now marked Obsolete, and no longer
15879 have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
15880 AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
15881 TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
15882 in 0.2.9.2-alpha and have now been removed. The previous default
15883 behavior is now always chosen; the previous (less secure) non-
15884 default behavior is now unavailable.
15885 - CloseHSClientCircuitsImmediatelyOnTimeout and
15886 CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
15887 0.2.9.2-alpha and now have been removed. HS circuits never close
15888 on circuit build timeout; they have a longer timeout period.
15889 - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
15890 in 0.2.9.2-alpha and now have been removed. Use the ORPort option
15891 (and others) to configure listen-only and advertise-only addresses.
15893 o Removed features (tools):
15894 - We've removed the tor-checkkey tool from src/tools. Long ago, we
15895 used it to help people detect RSA keys that were generated by
15896 versions of Debian affected by CVE-2008-0166. But those keys have
15897 been out of circulation for ages, and this tool is no longer
15898 required. Closes ticket 21842.
15901 Changes in version 0.3.0.7 - 2017-05-15
15902 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
15903 of Tor 0.3.0.x, where an attacker could cause a Tor relay process
15904 to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
15905 clients are not affected.
15907 o Major bugfixes (hidden service directory, security):
15908 - Fix an assertion failure in the hidden service directory code, which
15909 could be used by an attacker to remotely cause a Tor relay process to
15910 exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
15911 should upgrade. This security issue is tracked as TROVE-2017-002.
15912 Fixes bug 22246; bugfix on 0.3.0.1-alpha.
15915 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15918 o Minor features (future-proofing):
15919 - Tor no longer refuses to download microdescriptors or descriptors
15920 if they are listed as "published in the future". This change will
15921 eventually allow us to stop listing meaningful "published" dates
15922 in microdescriptor consensuses, and thereby allow us to reduce the
15923 resources required to download consensus diffs by over 50%.
15924 Implements part of ticket 21642; implements part of proposal 275.
15926 o Minor bugfixes (Linux seccomp2 sandbox):
15927 - The getpid() system call is now permitted under the Linux seccomp2
15928 sandbox, to avoid crashing with versions of OpenSSL (and other
15929 libraries) that attempt to learn the process's PID by using the
15930 syscall rather than the VDSO code. Fixes bug 21943; bugfix
15934 Changes in version 0.3.0.6 - 2017-04-26
15935 Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
15937 With the 0.3.0 series, clients and relays now use Ed25519 keys to
15938 authenticate their link connections to relays, rather than the old
15939 RSA1024 keys that they used before. (Circuit crypto has been
15940 Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
15941 the guard selection and replacement algorithm to behave more robustly
15942 in the presence of unreliable networks, and to resist guard-
15945 This series also includes numerous other small features and bugfixes,
15946 along with more groundwork for the upcoming hidden-services revamp.
15948 Per our stable release policy, we plan to support the Tor 0.3.0
15949 release series for at least the next nine months, or for three months
15950 after the first stable release of the 0.3.1 series: whichever is
15951 longer. If you need a release with long-term support, we recommend
15952 that you stay with the 0.2.9 series.
15954 Below are the changes since 0.3.0.5-rc. For a list of all changes
15955 since 0.2.9, see the ReleaseNotes file.
15957 o Minor features (geoip):
15958 - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
15961 o Minor bugfixes (control port):
15962 - The GETINFO extra-info/digest/<digest> command was broken because
15963 of a wrong base16 decode return value check, introduced when
15964 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
15966 o Minor bugfixes (crash prevention):
15967 - Fix a (currently untriggerable, but potentially dangerous) crash
15968 bug when base32-encoding inputs whose sizes are not a multiple of
15969 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
15972 Changes in version 0.3.0.5-rc - 2017-04-05
15973 Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
15974 0.3.0 release series.
15976 This is the second release candidate in the Tor 0.3.0 series, and has
15977 much fewer changes than the first. If we find no new bugs or
15978 regressions here, the first stable 0.3.0 release will be nearly
15981 o Major bugfixes (crash, directory connections):
15982 - Fix a rare crash when sending a begin cell on a circuit whose
15983 linked directory connection had already been closed. Fixes bug
15984 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
15986 o Major bugfixes (guard selection):
15987 - Fix a guard selection bug where Tor would refuse to bootstrap in
15988 some cases if the user swapped a bridge for another bridge in
15989 their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
15990 Reported by "torvlnt33r".
15992 o Minor features (geoip):
15993 - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
15996 o Minor bugfix (compilation):
15997 - Fix a warning when compiling hs_service.c. Previously, it had no
15998 exported symbols when compiled for libor.a, resulting in a
15999 compilation warning from clang. Fixes bug 21825; bugfix
16002 o Minor bugfixes (hidden services):
16003 - Make hidden services check for failed intro point connections,
16004 even when they have exceeded their intro point creation limit.
16005 Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
16006 - Make hidden services with 8 to 10 introduction points check for
16007 failed circuits immediately after startup. Previously, they would
16008 wait for 5 minutes before performing their first checks. Fixes bug
16009 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
16011 o Minor bugfixes (memory leaks):
16012 - Fix a memory leak when using GETCONF on a port option. Fixes bug
16013 21682; bugfix on 0.3.0.3-alpha.
16015 o Minor bugfixes (relay):
16016 - Avoid a double-marked-circuit warning that could happen when we
16017 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
16020 o Minor bugfixes (tests):
16021 - Run the entry_guard_parse_from_state_full() test with the time set
16022 to a specific date. (The guard state that this test was parsing
16023 contained guards that had expired since the test was first
16024 written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
16027 - Update the description of the directory server options in the
16028 manual page, to clarify that a relay no longer needs to set
16029 DirPort in order to be a directory cache. Closes ticket 21720.
16033 Changes in version 0.2.8.13 - 2017-03-03
16034 Tor 0.2.8.13 backports a security fix from later Tor
16035 releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
16036 this release, if for some reason they cannot upgrade to a later
16037 release series, and if they build Tor with the --enable-expensive-hardening
16040 Note that support for Tor 0.2.8.x is ending next year: we will not issue
16041 any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
16042 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16044 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16045 - Fix an integer underflow bug when comparing malformed Tor
16046 versions. This bug could crash Tor when built with
16047 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16048 0.2.9.8, which were built with -ftrapv by default. In other cases
16049 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16050 on 0.0.8pre1. Found by OSS-Fuzz.
16052 o Minor features (geoip):
16053 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16057 Changes in version 0.2.7.7 - 2017-03-03
16058 Tor 0.2.7.7 backports a number of security fixes from later Tor
16059 releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
16060 this release, if for some reason they cannot upgrade to a later
16063 Note that support for Tor 0.2.7.x is ending this year: we will not issue
16064 any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
16065 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16067 o Directory authority changes (backport from 0.2.8.5-rc):
16068 - Urras is no longer a directory authority. Closes ticket 19271.
16070 o Directory authority changes (backport from 0.2.9.2-alpha):
16071 - The "Tonga" bridge authority has been retired; the new bridge
16072 authority is "Bifroest". Closes tickets 19728 and 19690.
16074 o Directory authority key updates (backport from 0.2.8.1-alpha):
16075 - Update the V3 identity key for the dannenberg directory authority:
16076 it was changed on 18 November 2015. Closes task 17906. Patch
16079 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16080 - Fix a bug in parsing that could cause clients to read a single
16081 byte past the end of an allocated region. This bug could be used
16082 to cause hardened clients (built with --enable-expensive-hardening)
16083 to crash if they tried to visit a hostile hidden service. Non-
16084 hardened clients are only affected depending on the details of
16085 their platform's memory allocator. Fixes bug 21018; bugfix on
16086 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16087 2016-12-002 and as CVE-2016-1254.
16089 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16090 - Stop a crash that could occur when a client running with DNSPort
16091 received a query with multiple address types, and the first
16092 address type was not supported. Found and fixed by Scott Dial.
16093 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16094 - Prevent a class of security bugs caused by treating the contents
16095 of a buffer chunk as if they were a NUL-terminated string. At
16096 least one such bug seems to be present in all currently used
16097 versions of Tor, and would allow an attacker to remotely crash
16098 most Tor instances, especially those compiled with extra compiler
16099 hardening. With this defense in place, such bugs can't crash Tor,
16100 though we should still fix them as they occur. Closes ticket
16101 20384 (TROVE-2016-10-001).
16103 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16104 - Avoid a difficult-to-trigger heap corruption attack when extending
16105 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16106 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16107 Reported by Guido Vranken.
16109 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16110 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16111 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16113 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16114 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16115 pointer to the previous (uninitialized) key value. The impact here
16116 should be limited to a difficult-to-trigger crash, if OpenSSL is
16117 running an engine that makes key generation failures possible, or
16118 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16119 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16122 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16123 - Fix an integer underflow bug when comparing malformed Tor
16124 versions. This bug could crash Tor when built with
16125 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16126 0.2.9.8, which were built with -ftrapv by default. In other cases
16127 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16128 on 0.0.8pre1. Found by OSS-Fuzz.
16130 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16131 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16132 zero size. Check size argument to memwipe() for underflow. Fixes
16133 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16136 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16137 - Make Tor survive errors involving connections without a
16138 corresponding event object. Previously we'd fail with an
16139 assertion; now we produce a log message. Related to bug 16248.
16141 o Minor features (geoip):
16142 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16146 Changes in version 0.2.6.11 - 2017-03-03
16147 Tor 0.2.6.11 backports a number of security fixes from later Tor
16148 releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
16149 this release, if for some reason they cannot upgrade to a later
16152 Note that support for Tor 0.2.6.x is ending this year: we will not issue
16153 any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
16154 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16156 o Directory authority changes (backport from 0.2.8.5-rc):
16157 - Urras is no longer a directory authority. Closes ticket 19271.
16159 o Directory authority changes (backport from 0.2.9.2-alpha):
16160 - The "Tonga" bridge authority has been retired; the new bridge
16161 authority is "Bifroest". Closes tickets 19728 and 19690.
16163 o Directory authority key updates (backport from 0.2.8.1-alpha):
16164 - Update the V3 identity key for the dannenberg directory authority:
16165 it was changed on 18 November 2015. Closes task 17906. Patch
16168 o Major features (security fixes, backport from 0.2.9.4-alpha):
16169 - Prevent a class of security bugs caused by treating the contents
16170 of a buffer chunk as if they were a NUL-terminated string. At
16171 least one such bug seems to be present in all currently used
16172 versions of Tor, and would allow an attacker to remotely crash
16173 most Tor instances, especially those compiled with extra compiler
16174 hardening. With this defense in place, such bugs can't crash Tor,
16175 though we should still fix them as they occur. Closes ticket
16176 20384 (TROVE-2016-10-001).
16178 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16179 - Fix a bug in parsing that could cause clients to read a single
16180 byte past the end of an allocated region. This bug could be used
16181 to cause hardened clients (built with --enable-expensive-hardening)
16182 to crash if they tried to visit a hostile hidden service. Non-
16183 hardened clients are only affected depending on the details of
16184 their platform's memory allocator. Fixes bug 21018; bugfix on
16185 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16186 2016-12-002 and as CVE-2016-1254.
16188 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16189 - Stop a crash that could occur when a client running with DNSPort
16190 received a query with multiple address types, and the first
16191 address type was not supported. Found and fixed by Scott Dial.
16192 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16194 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16195 - Fix an error that could cause us to read 4 bytes before the
16196 beginning of an openssl string. This bug could be used to cause
16197 Tor to crash on systems with unusual malloc implementations, or
16198 systems with unusual hardening installed. Fixes bug 17404; bugfix
16201 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16202 - Avoid a difficult-to-trigger heap corruption attack when extending
16203 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16204 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16205 Reported by Guido Vranken.
16207 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16208 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16209 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16211 o Major bugfixes (guard selection, backport from 0.2.7.6):
16212 - Actually look at the Guard flag when selecting a new directory
16213 guard. When we implemented the directory guard design, we
16214 accidentally started treating all relays as if they have the Guard
16215 flag during guard selection, leading to weaker anonymity and worse
16216 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16219 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16220 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16221 pointer to the previous (uninitialized) key value. The impact here
16222 should be limited to a difficult-to-trigger crash, if OpenSSL is
16223 running an engine that makes key generation failures possible, or
16224 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16225 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16228 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16229 - Fix an integer underflow bug when comparing malformed Tor
16230 versions. This bug could crash Tor when built with
16231 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16232 0.2.9.8, which were built with -ftrapv by default. In other cases
16233 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16234 on 0.0.8pre1. Found by OSS-Fuzz.
16236 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16237 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16238 zero size. Check size argument to memwipe() for underflow. Fixes
16239 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16242 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16243 - Make Tor survive errors involving connections without a
16244 corresponding event object. Previously we'd fail with an
16245 assertion; now we produce a log message. Related to bug 16248.
16247 o Minor features (geoip):
16248 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16251 o Minor bugfixes (compilation, backport from 0.2.7.6):
16252 - Fix a compilation warning with Clang 3.6: Do not check the
16253 presence of an address which can never be NULL. Fixes bug 17781.
16256 Changes in version 0.2.5.13 - 2017-03-03
16257 Tor 0.2.5.13 backports a number of security fixes from later Tor
16258 releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
16259 this release, if for some reason they cannot upgrade to a later
16262 Note that support for Tor 0.2.5.x is ending next year: we will not issue
16263 any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
16264 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16266 o Directory authority changes (backport from 0.2.8.5-rc):
16267 - Urras is no longer a directory authority. Closes ticket 19271.
16269 o Directory authority changes (backport from 0.2.9.2-alpha):
16270 - The "Tonga" bridge authority has been retired; the new bridge
16271 authority is "Bifroest". Closes tickets 19728 and 19690.
16273 o Directory authority key updates (backport from 0.2.8.1-alpha):
16274 - Update the V3 identity key for the dannenberg directory authority:
16275 it was changed on 18 November 2015. Closes task 17906. Patch
16278 o Major features (security fixes, backport from 0.2.9.4-alpha):
16279 - Prevent a class of security bugs caused by treating the contents
16280 of a buffer chunk as if they were a NUL-terminated string. At
16281 least one such bug seems to be present in all currently used
16282 versions of Tor, and would allow an attacker to remotely crash
16283 most Tor instances, especially those compiled with extra compiler
16284 hardening. With this defense in place, such bugs can't crash Tor,
16285 though we should still fix them as they occur. Closes ticket
16286 20384 (TROVE-2016-10-001).
16288 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16289 - Fix a bug in parsing that could cause clients to read a single
16290 byte past the end of an allocated region. This bug could be used
16291 to cause hardened clients (built with --enable-expensive-hardening)
16292 to crash if they tried to visit a hostile hidden service. Non-
16293 hardened clients are only affected depending on the details of
16294 their platform's memory allocator. Fixes bug 21018; bugfix on
16295 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16296 2016-12-002 and as CVE-2016-1254.
16298 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16299 - Stop a crash that could occur when a client running with DNSPort
16300 received a query with multiple address types, and the first
16301 address type was not supported. Found and fixed by Scott Dial.
16302 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16304 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16305 - Fix an error that could cause us to read 4 bytes before the
16306 beginning of an openssl string. This bug could be used to cause
16307 Tor to crash on systems with unusual malloc implementations, or
16308 systems with unusual hardening installed. Fixes bug 17404; bugfix
16311 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16312 - Avoid a difficult-to-trigger heap corruption attack when extending
16313 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16314 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16315 Reported by Guido Vranken.
16317 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16318 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16319 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16321 o Major bugfixes (guard selection, backport from 0.2.7.6):
16322 - Actually look at the Guard flag when selecting a new directory
16323 guard. When we implemented the directory guard design, we
16324 accidentally started treating all relays as if they have the Guard
16325 flag during guard selection, leading to weaker anonymity and worse
16326 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16329 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16330 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16331 pointer to the previous (uninitialized) key value. The impact here
16332 should be limited to a difficult-to-trigger crash, if OpenSSL is
16333 running an engine that makes key generation failures possible, or
16334 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16335 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16338 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16339 - Fix an integer underflow bug when comparing malformed Tor
16340 versions. This bug could crash Tor when built with
16341 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16342 0.2.9.8, which were built with -ftrapv by default. In other cases
16343 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16344 on 0.0.8pre1. Found by OSS-Fuzz.
16346 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16347 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16348 zero size. Check size argument to memwipe() for underflow. Fixes
16349 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16352 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16353 - Make Tor survive errors involving connections without a
16354 corresponding event object. Previously we'd fail with an
16355 assertion; now we produce a log message. Related to bug 16248.
16357 o Minor features (geoip):
16358 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16361 o Minor bugfixes (compilation, backport from 0.2.7.6):
16362 - Fix a compilation warning with Clang 3.6: Do not check the
16363 presence of an address which can never be NULL. Fixes bug 17781.
16365 o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
16366 - Check for failures from crypto_early_init, and refuse to continue.
16367 A previous typo meant that we could keep going with an
16368 uninitialized crypto library, and would have OpenSSL initialize
16369 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
16370 when implementing ticket 4900. Patch by "teor".
16372 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
16373 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
16374 a client authorized hidden service. Fixes bug 15823; bugfix
16378 Changes in version 0.2.4.28 - 2017-03-03
16379 Tor 0.2.4.28 backports a number of security fixes from later Tor
16380 releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
16381 this release, if for some reason they cannot upgrade to a later
16384 Note that support for Tor 0.2.4.x is ending soon: we will not issue
16385 any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
16386 a Tor release series with long-term support, we recommend Tor 0.2.9.x.
16388 o Directory authority changes (backport from 0.2.8.5-rc):
16389 - Urras is no longer a directory authority. Closes ticket 19271.
16391 o Directory authority changes (backport from 0.2.9.2-alpha):
16392 - The "Tonga" bridge authority has been retired; the new bridge
16393 authority is "Bifroest". Closes tickets 19728 and 19690.
16395 o Directory authority key updates (backport from 0.2.8.1-alpha):
16396 - Update the V3 identity key for the dannenberg directory authority:
16397 it was changed on 18 November 2015. Closes task 17906. Patch
16400 o Major features (security fixes, backport from 0.2.9.4-alpha):
16401 - Prevent a class of security bugs caused by treating the contents
16402 of a buffer chunk as if they were a NUL-terminated string. At
16403 least one such bug seems to be present in all currently used
16404 versions of Tor, and would allow an attacker to remotely crash
16405 most Tor instances, especially those compiled with extra compiler
16406 hardening. With this defense in place, such bugs can't crash Tor,
16407 though we should still fix them as they occur. Closes ticket
16408 20384 (TROVE-2016-10-001).
16410 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16411 - Fix a bug in parsing that could cause clients to read a single
16412 byte past the end of an allocated region. This bug could be used
16413 to cause hardened clients (built with --enable-expensive-hardening)
16414 to crash if they tried to visit a hostile hidden service. Non-
16415 hardened clients are only affected depending on the details of
16416 their platform's memory allocator. Fixes bug 21018; bugfix on
16417 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16418 2016-12-002 and as CVE-2016-1254.
16420 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16421 - Fix an error that could cause us to read 4 bytes before the
16422 beginning of an openssl string. This bug could be used to cause
16423 Tor to crash on systems with unusual malloc implementations, or
16424 systems with unusual hardening installed. Fixes bug 17404; bugfix
16427 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16428 - Avoid a difficult-to-trigger heap corruption attack when extending
16429 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16430 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16431 Reported by Guido Vranken.
16433 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16434 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16435 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16437 o Major bugfixes (guard selection, backport from 0.2.7.6):
16438 - Actually look at the Guard flag when selecting a new directory
16439 guard. When we implemented the directory guard design, we
16440 accidentally started treating all relays as if they have the Guard
16441 flag during guard selection, leading to weaker anonymity and worse
16442 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16445 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16446 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16447 pointer to the previous (uninitialized) key value. The impact here
16448 should be limited to a difficult-to-trigger crash, if OpenSSL is
16449 running an engine that makes key generation failures possible, or
16450 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16451 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16454 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16455 - Fix an integer underflow bug when comparing malformed Tor
16456 versions. This bug could crash Tor when built with
16457 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16458 0.2.9.8, which were built with -ftrapv by default. In other cases
16459 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16460 on 0.0.8pre1. Found by OSS-Fuzz.
16462 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16463 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16464 zero size. Check size argument to memwipe() for underflow. Fixes
16465 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16468 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16469 - Make Tor survive errors involving connections without a
16470 corresponding event object. Previously we'd fail with an
16471 assertion; now we produce a log message. Related to bug 16248.
16473 o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
16474 - Make it harder for attackers to overload hidden services with
16475 introductions, by blocking multiple introduction requests on the
16476 same circuit. Resolves ticket 15515.
16478 o Minor features (geoip):
16479 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16482 o Minor bugfixes (compilation, backport from 0.2.7.6):
16483 - Fix a compilation warning with Clang 3.6: Do not check the
16484 presence of an address which can never be NULL. Fixes bug 17781.
16486 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
16487 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
16488 a client authorized hidden service. Fixes bug 15823; bugfix
16492 Changes in version 0.3.0.4-rc - 2017-03-01
16493 Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
16494 0.3.0 release series, and introduces a few reliability features to
16495 keep them from coming back.
16497 This is the first release candidate in the Tor 0.3.0 series. If we
16498 find no new bugs or regressions here, the first stable 0.3.0 release
16499 will be nearly identical to it.
16501 o Major bugfixes (bridges):
16502 - When the same bridge is configured multiple times with the same
16503 identity, but at different address:port combinations, treat those
16504 bridge instances as separate guards. This fix restores the ability
16505 of clients to configure the same bridge with multiple pluggable
16506 transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
16508 o Major bugfixes (hidden service directory v3):
16509 - Stop crashing on a failed v3 hidden service descriptor lookup
16510 failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
16512 o Major bugfixes (parsing):
16513 - When parsing a malformed content-length field from an HTTP
16514 message, do not read off the end of the buffer. This bug was a
16515 potential remote denial-of-service attack against Tor clients and
16516 relays. A workaround was released in October 2016, to prevent this
16517 bug from crashing Tor. This is a fix for the underlying issue,
16518 which should no longer matter (if you applied the earlier patch).
16519 Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
16520 using AFL (http://lcamtuf.coredump.cx/afl/).
16521 - Fix an integer underflow bug when comparing malformed Tor
16522 versions. This bug could crash Tor when built with
16523 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16524 0.2.9.8, which were built with -ftrapv by default. In other cases
16525 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16526 on 0.0.8pre1. Found by OSS-Fuzz.
16528 o Minor feature (protocol versioning):
16529 - Add new protocol version for proposal 224. HSIntro now advertises
16530 version "3-4" and HSDir version "1-2". Fixes ticket 20656.
16532 o Minor features (directory authorities):
16533 - Directory authorities now reject descriptors that claim to be
16534 malformed versions of Tor. Helps prevent exploitation of
16536 - Reject version numbers with components that exceed INT32_MAX.
16537 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
16538 Fixes bug 21450; bugfix on 0.0.8pre1.
16539 - Directory authorities now reject relays running versions
16540 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
16541 suffer from bug 20499 and don't keep their consensus cache
16542 up-to-date. Resolves ticket 20509.
16544 o Minor features (geoip):
16545 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16548 o Minor features (reliability, crash):
16549 - Try better to detect problems in buffers where they might grow (or
16550 think they have grown) over 2 GB in size. Diagnostic for
16553 o Minor features (testing):
16554 - During 'make test-network-all', if tor logs any warnings, ask
16555 chutney to output them. Requires a recent version of chutney with
16556 the 21572 patch. Implements 21570.
16558 o Minor bugfixes (certificate expiration time):
16559 - Avoid using link certificates that don't become valid till some
16560 time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
16562 o Minor bugfixes (code correctness):
16563 - Repair a couple of (unreachable or harmless) cases of the risky
16564 comparison-by-subtraction pattern that caused bug 21278.
16565 - Remove a redundant check for the UseEntryGuards option from the
16566 options_transition_affects_guards() function. Fixes bug 21492;
16567 bugfix on 0.3.0.1-alpha.
16569 o Minor bugfixes (directory mirrors):
16570 - Allow relays to use directory mirrors without a DirPort: these
16571 relays need to be contacted over their ORPorts using a begindir
16572 connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
16573 - Clarify the message logged when a remote relay is unexpectedly
16574 missing an ORPort or DirPort: users were confusing this with a
16575 local port. Fixes another case of bug 20711; bugfix
16578 o Minor bugfixes (guards):
16579 - Don't warn about a missing guard state on timeout-measurement
16580 circuits: they aren't supposed to be using guards. Fixes an
16581 instance of bug 21007; bugfix on 0.3.0.1-alpha.
16582 - Silence a BUG() warning when attempting to use a guard whose
16583 descriptor we don't know, and make this scenario less likely to
16584 happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
16586 o Minor bugfixes (hidden service):
16587 - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
16588 cells. Previously, we were using sizeof() on a pointer, instead of
16589 the real destination buffer. Fortunately, that value was only used
16590 to double-check that there was enough room--which was already
16591 enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
16593 o Minor bugfixes (testing):
16594 - Fix Raspbian build issues related to missing socket errno in
16595 test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
16597 - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
16598 actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
16599 - Use bash in src/test/test-network.sh. This ensures we reliably
16600 call chutney's newer tools/test-network.sh when available. Fixes
16601 bug 21562; bugfix on 0.2.9.1-alpha.
16604 - Small fixes to the fuzzing documentation. Closes ticket 21472.
16607 Changes in version 0.2.9.10 - 2017-03-01
16608 Tor 0.2.9.10 backports a security fix from later Tor release. It also
16609 includes fixes for some major issues affecting directory authorities,
16610 LibreSSL compatibility, and IPv6 correctness.
16612 The Tor 0.2.9.x release series is now marked as a long-term-support
16613 series. We intend to backport security fixes to 0.2.9.x until at
16614 least January of 2020.
16616 o Major bugfixes (directory authority, 0.3.0.3-alpha):
16617 - During voting, when marking a relay as a probable sybil, do not
16618 clear its BadExit flag: sybils can still be bad in other ways
16619 too. (We still clear the other flags.) Fixes bug 21108; bugfix
16622 o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
16623 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
16624 any IPv6 addresses. Instead, only reject a port over IPv6 if the
16625 exit policy rejects that port on more than an IPv6 /16 of
16626 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
16627 which rejected a relay's own IPv6 address by default. Fixes bug
16628 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
16630 o Major bugfixes (parsing, also in 0.3.0.4-rc):
16631 - Fix an integer underflow bug when comparing malformed Tor
16632 versions. This bug could crash Tor when built with
16633 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16634 0.2.9.8, which were built with -ftrapv by default. In other cases
16635 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16636 on 0.0.8pre1. Found by OSS-Fuzz.
16638 o Minor features (directory authorities, also in 0.3.0.4-rc):
16639 - Directory authorities now reject descriptors that claim to be
16640 malformed versions of Tor. Helps prevent exploitation of
16642 - Reject version numbers with components that exceed INT32_MAX.
16643 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
16644 Fixes bug 21450; bugfix on 0.0.8pre1.
16646 o Minor features (geoip):
16647 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16650 o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
16651 - Autoconf now checks to determine if OpenSSL structures are opaque,
16652 instead of explicitly checking for OpenSSL version numbers. Part
16654 - Support building with recent LibreSSL code that uses opaque
16655 structures. Closes ticket 21359.
16657 o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
16658 - Repair a couple of (unreachable or harmless) cases of the risky
16659 comparison-by-subtraction pattern that caused bug 21278.
16661 o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
16662 - The tor-resolve command line tool now rejects hostnames over 255
16663 characters in length. Previously, it would silently truncate them,
16664 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
16665 Patch by "junglefowl".
16668 Changes in version 0.3.0.3-alpha - 2017-02-03
16669 Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
16670 0.3.0.x development series, including some that could cause
16671 authorities to behave badly. There is also a fix for a longstanding
16672 bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
16673 includes some smaller features and bugfixes.
16675 The Tor 0.3.0.x release series is now in patch-freeze: no additional
16676 features will be considered for inclusion in 0.3.0.x. We suspect that
16677 some bugs will probably remain, however, and we encourage people to
16680 o Major bugfixes (directory authority):
16681 - During voting, when marking a relay as a probable sybil, do not
16682 clear its BadExit flag: sybils can still be bad in other ways
16683 too. (We still clear the other flags.) Fixes bug 21108; bugfix
16685 - When deciding whether we have just found a router to be reachable,
16686 do not penalize it for not having performed an Ed25519 link
16687 handshake if it does not claim to support an Ed25519 handshake.
16688 Previously, we would treat such relays as non-running. Fixes bug
16689 21107; bugfix on 0.3.0.1-alpha.
16691 o Major bugfixes (entry guards):
16692 - Stop trying to build circuits through entry guards for which we
16693 have no descriptor. Also, stop crashing in the case that we *do*
16694 accidentally try to build a circuit in such a state. Fixes bug
16695 21242; bugfix on 0.3.0.1-alpha.
16697 o Major bugfixes (IPv6 Exits):
16698 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
16699 any IPv6 addresses. Instead, only reject a port over IPv6 if the
16700 exit policy rejects that port on more than an IPv6 /16 of
16701 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
16702 which rejected a relay's own IPv6 address by default. Fixes bug
16703 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
16705 o Minor feature (client):
16706 - Enable IPv6 traffic on the SocksPort by default. To disable this,
16707 a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
16709 o Minor feature (fallback scripts):
16710 - Add a check_existing mode to updateFallbackDirs.py, which checks
16711 if fallbacks in the hard-coded list are working. Closes ticket
16712 20174. Patch by haxxpop.
16714 o Minor features (ciphersuite selection):
16715 - Clients now advertise a list of ciphersuites closer to the ones
16716 preferred by Firefox. Closes part of ticket 15426.
16717 - Allow relays to accept a wider range of ciphersuites, including
16718 chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
16720 o Minor features (controller, configuration):
16721 - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
16722 and so on, now comes with a __*Port variant that will not be saved
16723 to the torrc file by the controller's SAVECONF command. This
16724 change allows TorBrowser to set up a single-use domain socket for
16725 each time it launches Tor. Closes ticket 20956.
16726 - The GETCONF command can now query options that may only be
16727 meaningful in context-sensitive lists. This allows the controller
16728 to query the mixed SocksPort/__SocksPort style options introduced
16729 in feature 20956. Implements ticket 21300.
16731 o Minor features (portability, compilation):
16732 - Autoconf now checks to determine if OpenSSL structures are opaque,
16733 instead of explicitly checking for OpenSSL version numbers. Part
16735 - Support building with recent LibreSSL code that uses opaque
16736 structures. Closes ticket 21359.
16738 o Minor features (relay):
16739 - We now allow separation of exit and relay traffic to different
16740 source IP addresses, using the OutboundBindAddressExit and
16741 OutboundBindAddressOR options respectively. Closes ticket 17975.
16742 Written by Michael Sonntag.
16744 o Minor bugfix (logging):
16745 - Don't recommend the use of Tor2web in non-anonymous mode.
16746 Recommending Tor2web is a bad idea because the client loses all
16747 anonymity. Tor2web should only be used in specific cases by users
16748 who *know* and understand the issues. Fixes bug 21294; bugfix
16751 o Minor bugfixes (client):
16752 - Always recover from failures in extend_info_from_node(), in an
16753 attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
16754 bugfix on 0.2.3.1-alpha.
16756 o Minor bugfixes (client, entry guards):
16757 - Fix a bug warning (with backtrace) when we fail a channel that
16758 circuits to fallback directories on it. Fixes bug 21128; bugfix
16760 - Fix a spurious bug warning (with backtrace) when removing an
16761 expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
16762 - Fix a bug of the new guard algorithm where tor could stall for up
16763 to 10 minutes before retrying a guard after a long period of no
16764 network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
16765 - Do not try to build circuits until we have descriptors for our
16766 primary entry guards. Related to fix for bug 21242.
16768 o Minor bugfixes (configure, autoconf):
16769 - Rename the configure option --enable-expensive-hardening to
16770 --enable-fragile-hardening. Expensive hardening makes the tor
16771 daemon abort when some kinds of issues are detected. Thus, it
16772 makes tor more at risk of remote crashes but safer against RCE or
16773 heartbleed bug category. We now try to explain this issue in a
16774 message from the configure script. Fixes bug 21290; bugfix
16777 o Minor bugfixes (controller):
16778 - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
16779 20824; bugfix on 0.3.0.1-alpha.
16781 o Minor bugfixes (hidden service):
16782 - Clean up the code for expiring intro points with no associated
16783 circuits. It was causing, rarely, a service with some expiring
16784 introduction points to not open enough additional introduction
16785 points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
16786 - Stop setting the torrc option HiddenServiceStatistics to "0" just
16787 because we're not a bridge or relay. Instead, we preserve whatever
16788 value the user set (or didn't set). Fixes bug 21150; bugfix
16790 - Resolve two possible underflows which could lead to creating and
16791 closing a lot of introduction point circuits in a non-stop loop.
16792 Fixes bug 21302; bugfix on 0.2.7.2-alpha.
16794 o Minor bugfixes (portability):
16795 - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
16796 It is supported by OpenBSD itself, and also by most OpenBSD
16797 variants (such as Bitrig). Fixes bug 20980; bugfix
16799 - When mapping a file of length greater than SIZE_MAX, do not
16800 silently truncate its contents. This issue could occur on 32 bit
16801 systems with large file support and files which are larger than 4
16802 GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
16804 o Minor bugfixes (tor-resolve):
16805 - The tor-resolve command line tool now rejects hostnames over 255
16806 characters in length. Previously, it would silently truncate them,
16807 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
16808 Patch by "junglefowl".
16810 o Minor bugfixes (Windows services):
16811 - Be sure to initialize the monotonic time subsystem before using
16812 it, even when running as an NT service. Fixes bug 21356; bugfix
16816 Changes in version 0.3.0.2-alpha - 2017-01-23
16817 Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
16818 cause relays and clients to crash, even if they were not built with
16819 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
16820 versions, and also affects 0.3.0.1-alpha: all relays running an affected
16821 version should upgrade.
16823 Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
16824 time-to-live values, makes directory authorities enforce the 1-to-1
16825 mapping of relay RSA identity keys to ED25519 identity keys, fixes a
16826 client-side onion service reachability bug, does better at selecting
16827 the set of fallback directories, and more.
16829 o Major bugfixes (security, also in 0.2.9.9):
16830 - Downgrade the "-ftrapv" option from "always on" to "only on when
16831 --enable-expensive-hardening is provided." This hardening option, like
16832 others, can turn survivable bugs into crashes--and having it on by
16833 default made a (relatively harmless) integer overflow bug into a
16834 denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
16837 o Major features (security):
16838 - Change the algorithm used to decide DNS TTLs on client and server
16839 side, to better resist DNS-based correlation attacks like the
16840 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
16841 Feamster. Now relays only return one of two possible DNS TTL
16842 values, and clients are willing to believe DNS TTL values up to 3
16843 hours long. Closes ticket 19769.
16845 o Major features (directory authority, security):
16846 - The default for AuthDirPinKeys is now 1: directory authorities
16847 will reject relays where the RSA identity key matches a previously
16848 seen value, but the Ed25519 key has changed. Closes ticket 18319.
16850 o Major bugfixes (client, guard, crash):
16851 - In circuit_get_global_origin_list(), return the actual list of
16852 origin circuits. The previous version of this code returned the
16853 list of all the circuits, and could have caused strange bugs,
16854 including possible crashes. Fixes bug 21118; bugfix
16857 o Major bugfixes (client, onion service, also in 0.2.9.9):
16858 - Fix a client-side onion service reachability bug, where multiple
16859 socks requests to an onion service (or a single slow request)
16860 could cause us to mistakenly mark some of the service's
16861 introduction points as failed, and we cache that failure so
16862 eventually we run out and can't reach the service. Also resolves a
16863 mysterious "Remote server sent bogus reason code 65021" log
16864 warning. The bug was introduced in ticket 17218, where we tried to
16865 remember the circuit end reason as a uint16_t, which mangled
16866 negative values. Partially fixes bug 21056 and fixes bug 20307;
16867 bugfix on 0.2.8.1-alpha.
16869 o Major bugfixes (DNS):
16870 - Fix a bug that prevented exit nodes from caching DNS records for
16871 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
16873 o Minor features (controller):
16874 - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
16875 shared-random values to the controller. Closes ticket 19925.
16877 o Minor features (entry guards):
16878 - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
16879 break regression tests.
16880 - Require UseEntryGuards when UseBridges is set, in order to make
16881 sure bridges aren't bypassed. Resolves ticket 20502.
16883 o Minor features (fallback directories):
16884 - Select 200 fallback directories for each release. Closes
16886 - Allow 3 fallback relays per operator, which is safe now that we
16887 are choosing 200 fallback relays. Closes ticket 20912.
16888 - Exclude relays affected by bug 20499 from the fallback list.
16889 Exclude relays from the fallback list if they are running versions
16890 known to be affected by bug 20499, or if in our tests they deliver
16891 a stale consensus (i.e. one that expired more than 24 hours ago).
16892 Closes ticket 20539.
16893 - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
16895 - Require fallback directories to have the same address and port for
16896 7 days (now that we have enough relays with this stability).
16897 Relays whose OnionOO stability timer is reset on restart by bug
16898 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
16899 this issue. Closes ticket 20880; maintains short-term fix
16901 - Require fallbacks to have flags for 90% of the time (weighted
16902 decaying average), rather than 95%. This allows at least 73% of
16903 clients to bootstrap in the first 5 seconds without contacting an
16904 authority. Part of ticket 18828.
16905 - Annotate updateFallbackDirs.py with the bandwidth and consensus
16906 weight for each candidate fallback. Closes ticket 20878.
16907 - Make it easier to change the output sort order of fallbacks.
16908 Closes ticket 20822.
16909 - Display the relay fingerprint when downloading consensuses from
16910 fallbacks. Closes ticket 20908.
16912 o Minor features (geoip, also in 0.2.9.9):
16913 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
16916 o Minor features (next-gen onion service directories):
16917 - Remove the "EnableOnionServicesV3" consensus parameter that we
16918 introduced in 0.3.0.1-alpha: relays are now always willing to act
16919 as v3 onion service directories. Resolves ticket 19899.
16921 o Minor features (linting):
16922 - Enhance the changes file linter to warn on Tor versions that are
16923 prefixed with "tor-". Closes ticket 21096.
16925 o Minor features (logging):
16926 - In several places, describe unset ed25519 keys as "<unset>",
16927 rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
16929 o Minor bugfix (control protocol):
16930 - The reply to a "GETINFO config/names" request via the control
16931 protocol now spells the type "Dependent" correctly. This is a
16932 breaking change in the control protocol. (The field seems to be
16933 ignored by the most common known controllers.) Fixes bug 18146;
16934 bugfix on 0.1.1.4-alpha.
16936 o Minor bugfixes (bug resilience):
16937 - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
16938 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
16939 Hans Jerry Illikainen.
16941 o Minor bugfixes (build):
16942 - Replace obsolete Autoconf macros with their modern equivalent and
16943 prevent similar issues in the future. Fixes bug 20990; bugfix
16946 o Minor bugfixes (client, guards):
16947 - Fix bug where Tor would think that there are circuits waiting for
16948 better guards even though those circuits have been freed. Fixes
16949 bug 21142; bugfix on 0.3.0.1-alpha.
16951 o Minor bugfixes (config):
16952 - Don't assert on startup when trying to get the options list and
16953 LearnCircuitBuildTimeout is set to 0: we are currently parsing the
16954 options so of course they aren't ready yet. Fixes bug 21062;
16955 bugfix on 0.2.9.3-alpha.
16957 o Minor bugfixes (controller):
16958 - Make the GETINFO interface for inquiring about entry guards
16959 support the new guards backend. Fixes bug 20823; bugfix
16962 o Minor bugfixes (dead code):
16963 - Remove a redundant check for PidFile changes at runtime in
16964 options_transition_allowed(): this check is already performed
16965 regardless of whether the sandbox is active. Fixes bug 21123;
16966 bugfix on 0.2.5.4-alpha.
16968 o Minor bugfixes (documentation):
16969 - Update the tor manual page to document every option that can not
16970 be changed while tor is running. Fixes bug 21122.
16972 o Minor bugfixes (fallback directories):
16973 - Stop failing when a relay has no uptime data in
16974 updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
16975 - Avoid checking fallback candidates' DirPorts if they are down in
16976 OnionOO. When a relay operator has multiple relays, this
16977 prioritizes relays that are up over relays that are down. Fixes
16978 bug 20926; bugfix on 0.2.8.3-alpha.
16979 - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
16980 Fixes bug 20877; bugfix on 0.2.8.3-alpha.
16982 o Minor bugfixes (guards, bootstrapping):
16983 - When connecting to a directory guard during bootstrap, do not mark
16984 the guard as successful until we receive a good-looking directory
16985 response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
16987 o Minor bugfixes (onion services):
16988 - Fix the config reload pruning of old vs new services so it
16989 actually works when both ephemeral and non-ephemeral services are
16990 configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
16991 - Allow the number of introduction points to be as low as 0, rather
16992 than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
16994 o Minor bugfixes (IPv6):
16995 - Make IPv6-using clients try harder to find an IPv6 directory
16996 server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
16997 - When IPv6 addresses have not been downloaded yet (microdesc
16998 consensus documents don't list relay IPv6 addresses), use hard-
16999 coded addresses for authorities, fallbacks, and configured
17000 bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
17001 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
17003 o Minor bugfixes (memory leaks):
17004 - Fix a memory leak when configuring hidden services. Fixes bug
17005 20987; bugfix on 0.3.0.1-alpha.
17007 o Minor bugfixes (portability, also in 0.2.9.9):
17008 - Avoid crashing when Tor is built using headers that contain
17009 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
17010 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
17012 - Fix Libevent detection on platforms without Libevent 1 headers
17013 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
17015 o Minor bugfixes (relay):
17016 - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
17017 initializing the keys would reset the DataDirectory to 0700
17018 instead of 0750 even if DataDirectoryGroupReadable was set to 1.
17019 Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
17021 o Minor bugfixes (testing):
17022 - Remove undefined behavior from the backtrace generator by removing
17023 its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
17025 o Minor bugfixes (unit tests):
17026 - Allow the unit tests to pass even when DNS lookups of bogus
17027 addresses do not fail as expected. Fixes bug 20862 and 20863;
17028 bugfix on unit tests introduced in 0.2.8.1-alpha
17029 through 0.2.9.4-alpha.
17031 o Code simplification and refactoring:
17032 - Refactor code to manipulate global_origin_circuit_list into
17033 separate functions. Closes ticket 20921.
17035 o Documentation (formatting):
17036 - Clean up formatting of tor.1 man page and HTML doc, where <pre>
17037 blocks were incorrectly appearing. Closes ticket 20885.
17039 o Documentation (man page):
17040 - Clarify many options in tor.1 and add some min/max values for
17041 HiddenService options. Closes ticket 21058.
17044 Changes in version 0.2.9.9 - 2017-01-23
17045 Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
17046 cause relays and clients to crash, even if they were not built with
17047 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
17048 versions, and also affects 0.3.0.1-alpha: all relays running an affected
17049 version should upgrade.
17051 This release also resolves a client-side onion service reachability
17052 bug, and resolves a pair of small portability issues.
17054 o Major bugfixes (security):
17055 - Downgrade the "-ftrapv" option from "always on" to "only on when
17056 --enable-expensive-hardening is provided." This hardening option,
17057 like others, can turn survivable bugs into crashes -- and having
17058 it on by default made a (relatively harmless) integer overflow bug
17059 into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
17060 bugfix on 0.2.9.1-alpha.
17062 o Major bugfixes (client, onion service):
17063 - Fix a client-side onion service reachability bug, where multiple
17064 socks requests to an onion service (or a single slow request)
17065 could cause us to mistakenly mark some of the service's
17066 introduction points as failed, and we cache that failure so
17067 eventually we run out and can't reach the service. Also resolves a
17068 mysterious "Remote server sent bogus reason code 65021" log
17069 warning. The bug was introduced in ticket 17218, where we tried to
17070 remember the circuit end reason as a uint16_t, which mangled
17071 negative values. Partially fixes bug 21056 and fixes bug 20307;
17072 bugfix on 0.2.8.1-alpha.
17074 o Minor features (geoip):
17075 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
17078 o Minor bugfixes (portability):
17079 - Avoid crashing when Tor is built using headers that contain
17080 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
17081 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
17083 - Fix Libevent detection on platforms without Libevent 1 headers
17084 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
17087 Changes in version 0.3.0.1-alpha - 2016-12-19
17088 Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
17089 series. It strengthens Tor's link and circuit handshakes by
17090 identifying relays by their Ed25519 keys, improves the algorithm that
17091 clients use to choose and maintain their list of guards, and includes
17092 additional backend support for the next-generation hidden service
17093 design. It also contains numerous other small features and
17094 improvements to security, correctness, and performance.
17096 Below are the changes since 0.2.9.8.
17098 o Major features (guard selection algorithm):
17099 - Tor's guard selection algorithm has been redesigned from the
17100 ground up, to better support unreliable networks and restrictive
17101 sets of entry nodes, and to better resist guard-capture attacks by
17102 hostile local networks. Implements proposal 271; closes
17105 o Major features (next-generation hidden services):
17106 - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
17107 prop224 aka "Next Generation Hidden Services". Service and clients
17108 don't use this functionality yet. Closes ticket 19043. Based on
17109 initial code by Alec Heifetz.
17110 - Relays now support the HSDir version 3 protocol, so that they can
17111 can store and serve v3 descriptors. This is part of the next-
17112 generation onion service work detailed in proposal 224. Closes
17115 o Major features (protocol, ed25519 identity keys):
17116 - Relays now use Ed25519 to prove their Ed25519 identities and to
17117 one another, and to clients. This algorithm is faster and more
17118 secure than the RSA-based handshake we've been doing until now.
17119 Implements the second big part of proposal 220; Closes
17121 - Clients now support including Ed25519 identity keys in the EXTEND2
17122 cells they generate. By default, this is controlled by a consensus
17123 parameter, currently disabled. You can turn this feature on for
17124 testing by setting ExtendByEd25519ID in your configuration. This
17125 might make your traffic appear different than the traffic
17126 generated by other users, however. Implements part of ticket
17127 15056; part of proposal 220.
17128 - Relays now understand requests to extend to other relays by their
17129 Ed25519 identity keys. When an Ed25519 identity key is included in
17130 an EXTEND2 cell, the relay will only extend the circuit if the
17131 other relay can prove ownership of that identity. Implements part
17132 of ticket 15056; part of proposal 220.
17134 o Major bugfixes (scheduler):
17135 - Actually compare circuit policies in ewma_cmp_cmux(). This bug
17136 caused the channel scheduler to behave more or less randomly,
17137 rather than preferring channels with higher-priority circuits.
17138 Fixes bug 20459; bugfix on 0.2.6.2-alpha.
17140 o Minor features (controller):
17141 - When HSFETCH arguments cannot be parsed, say "Invalid argument"
17142 rather than "unrecognized." Closes ticket 20389; patch from
17145 o Minor features (diagnostic, directory client):
17146 - Warn when we find an unexpected inconsistency in directory
17147 download status objects. Prevents some negative consequences of
17150 o Minor features (directory authority):
17151 - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
17152 default) to control whether authorities should try to probe relays
17153 by their Ed25519 link keys. This option will go away in a few
17154 releases--unless we encounter major trouble in our ed25519 link
17155 protocol rollout, in which case it will serve as a safety option.
17157 o Minor features (directory cache):
17158 - Relays and bridges will now refuse to serve the consensus they
17159 have if they know it is too old for a client to use. Closes
17162 o Minor features (ed25519 link handshake):
17163 - Advertise support for the ed25519 link handshake using the
17164 subprotocol-versions mechanism, so that clients can tell which
17165 relays can identity themselves by Ed25519 ID. Closes ticket 20552.
17167 o Minor features (fingerprinting resistance, authentication):
17168 - Extend the length of RSA keys used for TLS link authentication to
17169 2048 bits. (These weren't used for forward secrecy; for forward
17170 secrecy, we used P256.) Closes ticket 13752.
17172 o Minor features (infrastructure):
17173 - Implement smartlist_add_strdup() function. Replaces the use of
17174 smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
17176 o Minor bugfixes (client):
17177 - When clients that use bridges start up with a cached consensus on
17178 disk, they were ignoring it and downloading a new one. Now they
17179 use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
17181 o Minor bugfixes (configuration):
17182 - Accept non-space whitespace characters after the severity level in
17183 the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
17184 - Support "TByte" and "TBytes" units in options given in bytes.
17185 "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
17186 supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
17188 o Minor bugfixes (consensus weight):
17189 - Add new consensus method that initializes bw weights to 1 instead
17190 of 0. This prevents a zero weight from making it all the way to
17191 the end (happens in small testing networks) and causing an error.
17192 Fixes bug 14881; bugfix on 0.2.2.17-alpha.
17194 o Minor bugfixes (descriptors):
17195 - Correctly recognise downloaded full descriptors as valid, even
17196 when using microdescriptors as circuits. This affects clients with
17197 FetchUselessDescriptors set, and may affect directory authorities.
17198 Fixes bug 20839; bugfix on 0.2.3.2-alpha.
17200 o Minor bugfixes (directory system):
17201 - Download all consensus flavors, descriptors, and authority
17202 certificates when FetchUselessDescriptors is set, regardless of
17203 whether tor is a directory cache or not. Fixes bug 20667; bugfix
17204 on all recent tor versions.
17205 - Bridges and relays now use microdescriptors (like clients do)
17206 rather than old-style router descriptors. Now bridges will blend
17207 in with clients in terms of the circuits they build. Fixes bug
17208 6769; bugfix on 0.2.3.2-alpha.
17210 o Minor bugfixes (ed25519 certificates):
17211 - Correctly interpret ed25519 certificates that would expire some
17212 time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
17214 o Minor bugfixes (hidden services):
17215 - Stop ignoring misconfigured hidden services. Instead, refuse to
17216 start tor until the misconfigurations have been corrected. Fixes
17217 bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
17220 o Minor bugfixes (memory leak at exit):
17221 - Fix a small harmless memory leak at exit of the previously unused
17222 RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
17225 o Minor bugfixes (util):
17226 - When finishing writing a file to disk, if we were about to replace
17227 the file with the temporary file created before and we fail to
17228 replace it, remove the temporary file so it doesn't stay on disk.
17229 Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
17231 o Minor bugfixes (Windows):
17232 - Check for getpagesize before using it to mmap files. This fixes
17233 compilation in some MinGW environments. Fixes bug 20530; bugfix on
17234 0.1.2.1-alpha. Reported by "ice".
17236 o Code simplification and refactoring:
17237 - Abolish all global guard context in entrynodes.c; replace with new
17238 guard_selection_t structure as preparation for proposal 271.
17239 Closes ticket 19858.
17240 - Introduce rend_service_is_ephemeral() that tells if given onion
17241 service is ephemeral. Replace unclear NULL-checkings for service
17242 directory with this function. Closes ticket 20526.
17243 - Extract magic numbers in circuituse.c into defined variables.
17244 - Refactor circuit_is_available_for_use to remove unnecessary check.
17245 - Refactor circuit_predict_and_launch_new for readability and
17246 testability. Closes ticket 18873.
17247 - Refactor large if statement in purpose_needs_anonymity to use
17248 switch statement instead. Closes part of ticket 20077.
17249 - Refactor the hashing API to return negative values for errors, as
17250 is done as throughout the codebase. Closes ticket 20717.
17251 - Remove data structures that were used to index or_connection
17252 objects by their RSA identity digests. These structures are fully
17253 redundant with the similar structures used in the
17254 channel abstraction.
17255 - Remove duplicate code in the channel_write_*cell() functions.
17256 Closes ticket 13827; patch from Pingl.
17257 - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
17258 use only purpose_needs_anonymity. Closes part of ticket 20077.
17259 - The code to generate and parse EXTEND and EXTEND2 cells has been
17260 replaced with code automatically generated by the
17264 - Include the "TBits" unit in Tor's man page. Fixes part of bug
17265 20622; bugfix on 0.2.5.1-alpha.
17266 - Change '1' to 'weight_scale' in consensus bw weights calculation
17267 comments, as that is reality. Closes ticket 20273. Patch
17269 - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
17270 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
17272 - Stop the man page from incorrectly stating that HiddenServiceDir
17273 must already exist. Fixes 20486.
17274 - Clarify that when ClientRejectInternalAddresses is enabled (which
17275 is the default), multicast DNS hostnames for machines on the local
17276 network (of the form *.local) are also rejected. Closes
17279 o Removed features:
17280 - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
17281 limit for relays running on a single IP applies to authority IP
17282 addresses as well as to non-authority IP addresses. Closes
17284 - The UseDirectoryGuards torrc option no longer exists: all users
17285 that use entry guards will also use directory guards. Related to
17286 proposal 271; implements part of ticket 20831.
17289 - New unit tests for tor_htonll(). Closes ticket 19563. Patch
17290 from "overcaffeinated".
17291 - Perform the coding style checks when running the tests and fail
17292 when coding style violations are found. Closes ticket 5500.
17293 - Add tests for networkstatus_compute_bw_weights_v10.
17294 - Add unit tests circuit_predict_and_launch_new.
17295 - Extract dummy_origin_circuit_new so it can be used by other
17299 Changes in version 0.2.8.12 - 2016-12-19
17300 Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
17301 below) where Tor clients could crash when attempting to visit a
17302 hostile hidden service. Clients are recommended to upgrade as packages
17303 become available for their systems.
17305 It also includes an updated list of fallback directories, backported
17308 Now that the Tor 0.2.9 series is stable, only major bugfixes will be
17309 backported to 0.2.8 in the future.
17311 o Major bugfixes (parsing, security, backported from 0.2.9.8):
17312 - Fix a bug in parsing that could cause clients to read a single
17313 byte past the end of an allocated region. This bug could be used
17314 to cause hardened clients (built with --enable-expensive-hardening)
17315 to crash if they tried to visit a hostile hidden service. Non-
17316 hardened clients are only affected depending on the details of
17317 their platform's memory allocator. Fixes bug 21018; bugfix on
17318 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
17319 2016-12-002 and as CVE-2016-1254.
17321 o Minor features (fallback directory list, backported from 0.2.9.8):
17322 - Replace the 81 remaining fallbacks of the 100 originally
17323 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
17324 fallbacks (123 new, 54 existing, 27 removed) generated in December
17325 2016. Resolves ticket 20170.
17327 o Minor features (geoip, backported from 0.2.9.7-rc):
17328 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
17332 Changes in version 0.2.9.8 - 2016-12-19
17333 Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
17335 The Tor 0.2.9 series makes mandatory a number of security features
17336 that were formerly optional. It includes support for a new shared-
17337 randomness protocol that will form the basis for next generation
17338 hidden services, includes a single-hop hidden service mode for
17339 optimizing .onion services that don't actually want to be hidden,
17340 tries harder not to overload the directory authorities with excessive
17341 downloads, and supports a better protocol versioning scheme for
17342 improved compatibility with other implementations of the Tor protocol.
17344 And of course, there are numerous other bugfixes and improvements.
17346 This release also includes a fix for a medium-severity issue (bug
17347 21018 below) where Tor clients could crash when attempting to visit a
17348 hostile hidden service. Clients are recommended to upgrade as packages
17349 become available for their systems.
17351 Below are the changes since 0.2.9.7-rc. For a list of all changes
17352 since 0.2.8, see the ReleaseNotes file.
17354 o Major bugfixes (parsing, security):
17355 - Fix a bug in parsing that could cause clients to read a single
17356 byte past the end of an allocated region. This bug could be used
17357 to cause hardened clients (built with --enable-expensive-hardening)
17358 to crash if they tried to visit a hostile hidden service. Non-
17359 hardened clients are only affected depending on the details of
17360 their platform's memory allocator. Fixes bug 21018; bugfix on
17361 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
17362 2016-12-002 and as CVE-2016-1254.
17364 o Minor features (fallback directory list):
17365 - Replace the 81 remaining fallbacks of the 100 originally
17366 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
17367 fallbacks (123 new, 54 existing, 27 removed) generated in December
17368 2016. Resolves ticket 20170.
17371 Changes in version 0.2.9.7-rc - 2016-12-12
17372 Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
17373 including a few that had prevented tests from passing on
17376 o Minor features (geoip):
17377 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
17380 o Minor bugfix (build):
17381 - The current Git revision when building from a local repository is
17382 now detected correctly when using git worktrees. Fixes bug 20492;
17383 bugfix on 0.2.3.9-alpha.
17385 o Minor bugfixes (directory authority):
17386 - When computing old Tor protocol line version in protover, we were
17387 looking at 0.2.7.5 twice instead of a specific case for
17388 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
17390 o Minor bugfixes (download scheduling):
17391 - Resolve a "bug" warning when considering a download schedule whose
17392 delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
17394 o Minor bugfixes (logging):
17395 - Downgrade a harmless log message about the
17396 pending_entry_connections list from "warn" to "info". Mitigates
17399 o Minor bugfixes (memory leak):
17400 - Fix a small memory leak when receiving AF_UNIX connections on a
17401 SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
17402 - When moving a signed descriptor object from a source to an
17403 existing destination, free the allocated memory inside that
17404 destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
17406 o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
17407 - Fix a memory leak and use-after-free error when removing entries
17408 from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
17409 0.2.5.5-alpha. Patch from "cypherpunks".
17411 o Minor bugfixes (portability):
17412 - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
17413 Fixes bug 20935; bugfix on 0.2.9.6-rc.
17415 o Minor bugfixes (unit tests):
17416 - Stop expecting NetBSD unit tests to report success for ipfw. Part
17417 of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
17418 - Fix tolerances in unit tests for monotonic time comparisons
17419 between nanoseconds and microseconds. Previously, we accepted a 10
17420 us difference only, which is not realistic on every platform's
17421 clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
17422 - Remove a double-free in the single onion service unit test. Stop
17423 ignoring a return value. Make future changes less error-prone.
17424 Fixes bug 20864; bugfix on 0.2.9.6-rc.
17427 Changes in version 0.2.8.11 - 2016-12-08
17428 Tor 0.2.8.11 backports fixes for additional portability issues that
17429 could prevent Tor from building correctly on OSX Sierra, or with
17430 OpenSSL 1.1. Affected users should upgrade; others can safely stay
17433 o Minor bugfixes (portability):
17434 - Avoid compilation errors when building on OSX Sierra. Sierra began
17435 to support the getentropy() and clock_gettime() APIs, but created
17436 a few problems in doing so. Tor 0.2.9 has a more thorough set of
17437 workarounds; in 0.2.8, we are just using the /dev/urandom and mach
17438 monotonic time interfaces. Fixes bug 20865. Bugfix
17441 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
17442 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
17443 architectures. Closes ticket 20588.
17446 Changes in version 0.2.8.10 - 2016-12-02
17447 Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
17448 unusable after they left standby mode. It also backports fixes for
17449 a few portability issues and a small but problematic memory leak.
17451 o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
17452 - When Tor leaves standby because of a new application request, open
17453 circuits as needed to serve that request. Previously, we would
17454 potentially wait a very long time. Fixes part of bug 19969; bugfix
17457 o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
17458 - Clients now respond to new application stream requests immediately
17459 when they arrive, rather than waiting up to one second before
17460 starting to handle them. Fixes part of bug 19969; bugfix
17463 o Minor bugfixes (portability, backport from 0.2.9.6-rc):
17464 - Work around a bug in the OSX 10.12 SDK that would prevent us from
17465 successfully targeting earlier versions of OSX. Resolves
17468 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
17469 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
17470 20551; bugfix on 0.2.1.1-alpha.
17472 o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
17473 - Work around a memory leak in OpenSSL 1.1 when encoding public
17474 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
17476 o Minor features (geoip):
17477 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
17480 Changes in version 0.2.9.6-rc - 2016-12-02
17481 Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
17482 version. We hope that it will be ready to become stable soon, and we
17483 encourage everyone to test this release. If no showstopper bugs are
17484 found here, the next 0.2.9 release will be stable.
17486 o Major bugfixes (relay, resolver, logging):
17487 - For relays that don't know their own address, avoid attempting a
17488 local hostname resolve for each descriptor we download. This
17489 will cut down on the number of "Success: chose address 'x.x.x.x'"
17490 log lines, and also avoid confusing clock jumps if the resolver
17491 is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
17493 o Minor bugfixes (client, fascistfirewall):
17494 - Avoid spurious warnings when ReachableAddresses or FascistFirewall
17495 is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
17497 o Minor bugfixes (hidden services):
17498 - Stop ignoring the anonymity status of saved keys for hidden
17499 services and single onion services when first starting tor.
17500 Instead, refuse to start tor if any hidden service key has been
17501 used in a different hidden service anonymity mode. Fixes bug
17502 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
17504 o Minor bugfixes (portability):
17505 - Work around a bug in the OSX 10.12 SDK that would prevent us from
17506 successfully targeting earlier versions of OSX. Resolves
17508 - Run correctly when built on Windows build environments that
17509 require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
17511 o Minor bugfixes (single onion services, Tor2web):
17512 - Stop complaining about long-term one-hop circuits deliberately
17513 created by single onion services and Tor2web. These log messages
17514 are intended to diagnose issue 8387, which relates to circuits
17515 hanging around forever for no reason. Fixes bug 20613; bugfix on
17516 0.2.9.1-alpha. Reported by "pastly".
17518 o Minor bugfixes (unit tests):
17519 - Stop spurious failures in the local interface address discovery
17520 unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
17524 - Correct the minimum bandwidth value in torrc.sample, and queue a
17525 corresponding change for torrc.minimal. Closes ticket 20085.
17528 Changes in version 0.2.9.5-alpha - 2016-11-08
17529 Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
17530 version. We believe one or two probably remain, and we encourage
17531 everyone to test this release.
17533 o Major bugfixes (client performance):
17534 - Clients now respond to new application stream requests immediately
17535 when they arrive, rather than waiting up to one second before
17536 starting to handle them. Fixes part of bug 19969; bugfix
17539 o Major bugfixes (client reliability):
17540 - When Tor leaves standby because of a new application request, open
17541 circuits as needed to serve that request. Previously, we would
17542 potentially wait a very long time. Fixes part of bug 19969; bugfix
17545 o Major bugfixes (download scheduling):
17546 - When using an exponential backoff schedule, do not give up on
17547 downloading just because we have failed a bunch of times. Since
17548 each delay is longer than the last, retrying indefinitely won't
17549 hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
17550 - If a consensus expires while we are waiting for certificates to
17551 download, stop waiting for certificates.
17552 - If we stop waiting for certificates less than a minute after we
17553 started downloading them, do not consider the certificate download
17554 failure a separate failure. Fixes bug 20533; bugfix
17556 - Remove the maximum delay on exponential-backoff scheduling. Since
17557 we now allow an infinite number of failures (see ticket 20536), we
17558 must now allow the time to grow longer on each failure. Fixes part
17559 of bug 20534; bugfix on 0.2.9.1-alpha.
17560 - Make our initial download delays closer to those from 0.2.8. Fixes
17561 another part of bug 20534; bugfix on 0.2.9.1-alpha.
17562 - When determining when to download a directory object, handle times
17563 after 2038 if the operating system supports them. (Someday this
17564 will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
17565 - When using exponential backoff in test networks, use a lower
17566 exponent, so the delays do not vary as much. This helps test
17567 networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
17569 o Minor features (geoip):
17570 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
17573 o Minor bugfixes (client directory scheduling):
17574 - Treat "relay too busy to answer request" as a failed request and a
17575 reason to back off on our retry frequency. This is safe now that
17576 exponential backoffs retry indefinitely, and avoids a bug where we
17577 would reset our download schedule erroneously. Fixes bug 20593;
17578 bugfix on 0.2.9.1-alpha.
17580 o Minor bugfixes (client, logging):
17581 - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
17582 assume all nodes support EXTEND2. Use ntor whenever a key is
17583 available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
17584 - On DNSPort, stop logging a BUG warning on a failed hostname
17585 lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
17587 o Minor bugfixes (hidden services):
17588 - When configuring hidden services, check every hidden service
17589 directory's permissions. Previously, we only checked the last
17590 hidden service. Fixes bug 20529; bugfix the work to fix 13942
17593 o Minor bugfixes (portability):
17594 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
17595 architectures. Closes ticket 20588.
17596 - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
17597 removed the ECDH ciphers which caused the tests to fail on
17598 platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
17599 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
17600 20551; bugfix on 0.2.1.1-alpha.
17602 o Minor bugfixes (relay bootstrap):
17603 - Ensure relays don't make multiple connections during bootstrap.
17604 Fixes bug 20591; bugfix on 0.2.8.1-alpha.
17606 o Minor bugfixes (relay):
17607 - Work around a memory leak in OpenSSL 1.1 when encoding public
17608 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
17609 - Avoid a small memory leak when informing worker threads about
17610 rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
17611 - Do not try to parallelize workers more than 16x without the user
17612 explicitly configuring us to do so, even if we do detect more than
17613 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
17615 o Minor bugfixes (single onion services):
17616 - Start correctly when creating a single onion service in a
17617 directory that did not previously exist. Fixes bug 20484; bugfix
17620 o Minor bugfixes (testing):
17621 - Avoid a unit test failure on systems with over 16 detectable CPU
17622 cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
17625 - Clarify that setting HiddenServiceNonAnonymousMode requires you to
17626 also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
17627 - Module-level documentation for several more modules. Closes
17628 tickets 19287 and 19290.
17631 Changes in version 0.2.8.9 - 2016-10-17
17632 Tor 0.2.8.9 backports a fix for a security hole in previous versions
17633 of Tor that would allow a remote attacker to crash a Tor client,
17634 hidden service, relay, or authority. All Tor users should upgrade to
17635 this version, or to 0.2.9.4-alpha. Patches will be released for older
17638 o Major features (security fixes, also in 0.2.9.4-alpha):
17639 - Prevent a class of security bugs caused by treating the contents
17640 of a buffer chunk as if they were a NUL-terminated string. At
17641 least one such bug seems to be present in all currently used
17642 versions of Tor, and would allow an attacker to remotely crash
17643 most Tor instances, especially those compiled with extra compiler
17644 hardening. With this defense in place, such bugs can't crash Tor,
17645 though we should still fix them as they occur. Closes ticket
17646 20384 (TROVE-2016-10-001).
17648 o Minor features (geoip):
17649 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
17653 Changes in version 0.2.9.4-alpha - 2016-10-17
17654 Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
17655 that would allow a remote attacker to crash a Tor client, hidden
17656 service, relay, or authority. All Tor users should upgrade to this
17657 version, or to 0.2.8.9. Patches will be released for older versions
17660 Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
17661 previous versions of Tor, including the implementation of a feature to
17662 future- proof the Tor ecosystem against protocol changes, some bug
17663 fixes necessary for Tor Browser to use unix domain sockets correctly,
17664 and several portability improvements. We anticipate that this will be
17665 the last alpha in the Tor 0.2.9 series, and that the next release will
17666 be a release candidate.
17668 o Major features (security fixes):
17669 - Prevent a class of security bugs caused by treating the contents
17670 of a buffer chunk as if they were a NUL-terminated string. At
17671 least one such bug seems to be present in all currently used
17672 versions of Tor, and would allow an attacker to remotely crash
17673 most Tor instances, especially those compiled with extra compiler
17674 hardening. With this defense in place, such bugs can't crash Tor,
17675 though we should still fix them as they occur. Closes ticket
17676 20384 (TROVE-2016-10-001).
17678 o Major features (subprotocol versions):
17679 - Tor directory authorities now vote on a set of recommended
17680 subprotocol versions, and on a set of required subprotocol
17681 versions. Clients and relays that lack support for a _required_
17682 subprotocol version will not start; those that lack support for a
17683 _recommended_ subprotocol version will warn the user to upgrade.
17684 Closes ticket 19958; implements part of proposal 264.
17685 - Tor now uses "subprotocol versions" to indicate compatibility.
17686 Previously, versions of Tor looked at the declared Tor version of
17687 a relay to tell whether they could use a given feature. Now, they
17688 should be able to rely on its declared subprotocol versions. This
17689 change allows compatible implementations of the Tor protocol(s) to
17690 exist without pretending to be 100% bug-compatible with particular
17691 releases of Tor itself. Closes ticket 19958; implements part of
17694 o Minor feature (fallback directories):
17695 - Remove broken fallbacks from the hard-coded fallback directory
17696 list. Closes ticket 20190; patch by teor.
17698 o Minor features (client, directory):
17699 - Since authorities now omit all routers that lack the Running and
17700 Valid flags, we assume that any relay listed in the consensus must
17701 have those flags. Closes ticket 20001; implements part of
17704 o Minor features (compilation, portability):
17705 - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
17708 o Minor features (development tools, etags):
17709 - Teach the "make tags" Makefile target how to correctly find
17710 "MOCK_IMPL" function definitions. Patch from nherring; closes
17713 o Minor features (geoip):
17714 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
17717 o Minor features (unix domain sockets):
17718 - When configuring a unix domain socket for a SocksPort,
17719 ControlPort, or Hidden service, you can now wrap the address in
17720 quotes, using C-style escapes inside the quotes. This allows unix
17721 domain socket paths to contain spaces.
17723 o Minor features (virtual addresses):
17724 - Increase the maximum number of bits for the IPv6 virtual network
17725 prefix from 16 to 104. In this way, the condition for address
17726 allocation is less restrictive. Closes ticket 20151; feature
17729 o Minor bugfixes (address discovery):
17730 - Stop reordering IP addresses returned by the OS. This makes it
17731 more likely that Tor will guess the same relay IP address every
17732 time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
17733 Reported by René Mayrhofer, patch by "cypherpunks".
17735 o Minor bugfixes (client, unix domain sockets):
17736 - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
17737 the client address is meaningless. Fixes bug 20261; bugfix
17740 o Minor bugfixes (compilation, OpenBSD):
17741 - Detect Libevent2 functions correctly on systems that provide
17742 libevent2, but where libevent1 is linked with -levent. Fixes bug
17743 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
17745 o Minor bugfixes (configuration):
17746 - When parsing quoted configuration values from the torrc file,
17747 handle windows line endings correctly. Fixes bug 19167; bugfix on
17748 0.2.0.16-alpha. Patch from "Pingl".
17750 o Minor bugfixes (getpass):
17751 - Defensively fix a non-triggerable heap corruption at do_getpass()
17752 to protect ourselves from mistakes in the future. Fixes bug
17753 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
17756 o Minor bugfixes (hidden service):
17757 - Allow hidden services to run on IPv6 addresses even when the
17758 IPv6Exit option is not set. Fixes bug 18357; bugfix
17762 - Add module-level internal documentation for 36 C files that
17763 previously didn't have a high-level overview. Closes ticket #20385.
17765 o Required libraries:
17766 - When building with OpenSSL, Tor now requires version 1.0.1 or
17767 later. OpenSSL 1.0.0 and earlier are no longer supported by the
17768 OpenSSL team, and should not be used. Closes ticket 20303.
17771 Changes in version 0.2.9.3-alpha - 2016-09-23
17772 Tor 0.2.9.3-alpha adds improved support for entities that want to make
17773 high-performance services available through the Tor .onion mechanism
17774 without themselves receiving anonymity as they host those services. It
17775 also tries harder to ensure that all steps on a circuit are using the
17776 strongest crypto possible, strengthens some TLS properties, and
17777 resolves several bugs -- including a pair of crash bugs from the 0.2.8
17778 series. Anybody running an earlier version of 0.2.9.x should upgrade.
17780 o Major bugfixes (crash, also in 0.2.8.8):
17781 - Fix a complicated crash bug that could affect Tor clients
17782 configured to use bridges when replacing a networkstatus consensus
17783 in which one of their bridges was mentioned. OpenBSD users saw
17784 more crashes here, but all platforms were potentially affected.
17785 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
17787 o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
17788 - Fix a timing-dependent assertion failure that could occur when we
17789 tried to flush from a circuit after having freed its cells because
17790 of an out-of-memory condition. Fixes bug 20203; bugfix on
17791 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
17794 o Major features (circuit building, security):
17795 - Authorities, relays and clients now require ntor keys in all
17796 descriptors, for all hops (except for rare hidden service protocol
17797 cases), for all circuits, and for all other roles. Part of
17799 - Tor authorities, relays, and clients only use ntor, except for
17800 rare cases in the hidden service protocol. Part of ticket 19163.
17802 o Major features (single-hop "hidden" services):
17803 - Add experimental HiddenServiceSingleHopMode and
17804 HiddenServiceNonAnonymousMode options. When both are set to 1,
17805 every hidden service on a Tor instance becomes a non-anonymous
17806 Single Onion Service. Single Onions make one-hop (direct)
17807 connections to their introduction and rendezvous points. One-hop
17808 circuits make Single Onion servers easily locatable, but clients
17809 remain location-anonymous. This is compatible with the existing
17810 hidden service implementation, and works on the current tor
17811 network without any changes to older relays or clients. Implements
17812 proposal 260, completes ticket 17178. Patch by teor and asn.
17814 o Major features (resource management):
17815 - Tor can now notice it is about to run out of sockets, and
17816 preemptively close connections of lower priority. (This feature is
17817 off by default for now, since the current prioritizing method is
17818 yet not mature enough. You can enable it by setting
17819 "DisableOOSCheck 0", but watch out: it might close some sockets
17820 you would rather have it keep.) Closes ticket 18640.
17822 o Major bugfixes (circuit building):
17823 - Hidden service client-to-intro-point and service-to-rendezvous-
17824 point circuits use the TAP key supplied by the protocol, to avoid
17825 epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
17827 o Major bugfixes (compilation, OpenBSD):
17828 - Fix a Libevent-detection bug in our autoconf script that would
17829 prevent Tor from linking successfully on OpenBSD. Patch from
17830 rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
17832 o Major bugfixes (hidden services):
17833 - Clients now require hidden services to include the TAP keys for
17834 their intro points in the hidden service descriptor. This prevents
17835 an inadvertent upgrade to ntor, which a malicious hidden service
17836 could use to distinguish clients by consensus version. Fixes bug
17837 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
17839 o Minor features (security, TLS):
17840 - Servers no longer support clients that without AES ciphersuites.
17841 (3DES is no longer considered an acceptable cipher.) We believe
17842 that no such Tor clients currently exist, since Tor has required
17843 OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
17845 o Minor feature (fallback directories):
17846 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
17847 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
17848 2016. Closes ticket 20190; patch by teor.
17850 o Minor features (geoip, also in 0.2.8.8):
17851 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
17854 o Minor feature (port flags):
17855 - Add new flags to the *Port options to finer control over which
17856 requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
17857 and the synthetic flag OnionTrafficOnly, which is equivalent to
17858 NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
17859 18693; patch by "teor".
17861 o Minor features (directory authority):
17862 - After voting, if the authorities decide that a relay is not
17863 "Valid", they no longer include it in the consensus at all. Closes
17864 ticket 20002; implements part of proposal 272.
17866 o Minor features (testing):
17867 - Disable memory protections on OpenBSD when performing our unit
17868 tests for memwipe(). The test deliberately invokes undefined
17869 behavior, and the OpenBSD protections interfere with this. Patch
17870 from "rubiate". Closes ticket 20066.
17872 o Minor features (testing, ipv6):
17873 - Add the single-onion and single-onion-ipv6 chutney targets to
17874 "make test-network-all". This requires a recent chutney version
17875 with the single onion network flavours (git c72a652 or later).
17876 Closes ticket 20072; patch by teor.
17877 - Add the hs-ipv6 chutney target to make test-network-all's IPv6
17878 tests. Remove bridges+hs, as it's somewhat redundant. This
17879 requires a recent chutney version that supports IPv6 clients,
17880 relays, and authorities. Closes ticket 20069; patch by teor.
17882 o Minor features (Tor2web):
17883 - Make Tor2web clients respect ReachableAddresses. This feature was
17884 inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
17885 0.2.8.7. Implements feature 20034. Patch by teor.
17887 o Minor features (unit tests):
17888 - We've done significant work to make the unit tests run faster.
17889 - Our link-handshake unit tests now check that when invalid
17890 handshakes fail, they fail with the error messages we expected.
17891 - Our unit testing code that captures log messages no longer
17892 prevents them from being written out if the user asked for them
17893 (by passing --debug or --info or or --notice --warn to the "test"
17894 binary). This change prevents us from missing unexpected log
17895 messages simply because we were looking for others. Related to
17897 - The unit tests now log all warning messages with the "BUG" flag.
17898 Previously, they only logged errors by default. This change will
17899 help us make our testing code more correct, and make sure that we
17900 only hit this code when we mean to. In the meantime, however,
17901 there will be more warnings in the unit test logs than before.
17902 This is preparatory work for ticket 19999.
17903 - The unit tests now treat any failure of a "tor_assert_nonfatal()"
17904 assertion as a test failure.
17906 o Minor bug fixes (circuits):
17907 - Use the CircuitBuildTimeout option whenever
17908 LearnCircuitBuildTimeout is disabled. Previously, we would respect
17909 the option when a user disabled it, but not when it was disabled
17910 because some other option was set. Fixes bug 20073; bugfix on
17911 0.2.4.12-alpha. Patch by teor.
17913 o Minor bugfixes (allocation):
17914 - Change how we allocate memory for large chunks on buffers, to
17915 avoid a (currently impossible) integer overflow, and to waste less
17916 space when allocating unusually large chunks. Fixes bug 20081;
17917 bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
17918 - Always include orconfig.h before including any other C headers.
17919 Sometimes, it includes macros that affect the behavior of the
17920 standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
17921 first version to use AC_USE_SYSTEM_EXTENSIONS).
17922 - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
17923 compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
17924 Patch from Gisle Vanem.
17925 - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
17926 They apparently require a set of annotations that we aren't
17927 currently using, and they create false positives in our pthreads
17928 wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
17930 o Minor bugfixes (directory authority):
17931 - Die with a more useful error when the operator forgets to place
17932 the authority_signing_key file into the keys directory. This
17933 avoids an uninformative assert & traceback about having an invalid
17934 key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
17935 - When allowing private addresses, mark Exits that only exit to
17936 private locations as such. Fixes bug 20064; bugfix
17939 o Minor bugfixes (documentation):
17940 - Document the default PathsNeededToBuildCircuits value that's used
17941 by clients when the directory authorities don't set
17942 min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
17943 in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
17944 - Fix manual for the User option: it takes a username, not a UID.
17945 Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
17948 o Minor bugfixes (hidden services):
17949 - Stop logging intro point details to the client log on certain
17950 error conditions. Fixed as part of bug 20012; bugfix on
17951 0.2.4.8-alpha. Patch by teor.
17953 o Minor bugfixes (IPv6, testing):
17954 - Check for IPv6 correctly on Linux when running test networks.
17955 Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
17957 o Minor bugfixes (Linux seccomp2 sandbox):
17958 - Add permission to run the sched_yield() and sigaltstack() system
17959 calls, in order to support versions of Tor compiled with asan or
17960 ubsan code that use these calls. Now "sandbox 1" and
17961 "--enable-expensive-hardening" should be compatible on more
17962 systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
17964 o Minor bugfixes (logging):
17965 - When logging a message from the BUG() macro, be explicit about
17966 what we were asserting. Previously we were confusing what we were
17967 asserting with what the bug was. Fixes bug 20093; bugfix
17969 - When we are unable to remove the bw_accounting file, do not warn
17970 if the reason we couldn't remove it was that it didn't exist.
17971 Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
17973 o Minor bugfixes (option parsing):
17974 - Count unix sockets when counting client listeners (SOCKS, Trans,
17975 NATD, and DNS). This has no user-visible behaviour changes: these
17976 options are set once, and never read. Required for correct
17977 behaviour in ticket 17178. Fixes bug 19677; bugfix on
17978 0.2.6.3-alpha. Patch by teor.
17980 o Minor bugfixes (options):
17981 - Check the consistency of UseEntryGuards and EntryNodes more
17982 reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
17984 - Stop changing the configured value of UseEntryGuards on
17985 authorities and Tor2web clients. Fixes bug 20074; bugfix on
17986 commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
17989 o Minor bugfixes (Tor2web):
17990 - Prevent Tor2web clients running hidden services, these services
17991 are not anonymous due to the one-hop client paths. Fixes bug
17992 19678. Patch by teor.
17994 o Minor bugfixes (unit tests):
17995 - Fix a shared-random unit test that was failing on big endian
17996 architectures due to internal representation of a integer copied
17997 to a buffer. The test is changed to take a full 32 bytes of data
17998 and use the output of a python script that make the COMMIT and
17999 REVEAL calculation according to the spec. Fixes bug 19977; bugfix
18001 - The tor_tls_server_info_callback unit test no longer crashes when
18002 debug-level logging is turned on. Fixes bug 20041; bugfix
18006 Changes in version 0.2.8.8 - 2016-09-23
18007 Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
18008 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
18009 who select public relays as their bridges.
18011 o Major bugfixes (crash):
18012 - Fix a complicated crash bug that could affect Tor clients
18013 configured to use bridges when replacing a networkstatus consensus
18014 in which one of their bridges was mentioned. OpenBSD users saw
18015 more crashes here, but all platforms were potentially affected.
18016 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
18018 o Major bugfixes (relay, OOM handler):
18019 - Fix a timing-dependent assertion failure that could occur when we
18020 tried to flush from a circuit after having freed its cells because
18021 of an out-of-memory condition. Fixes bug 20203; bugfix on
18022 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
18025 o Minor feature (fallback directories):
18026 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
18027 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
18028 2016. Closes ticket 20190; patch by teor.
18030 o Minor features (geoip):
18031 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
18035 Changes in version 0.2.9.2-alpha - 2016-08-24
18036 Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
18037 several new features and bugfixes. It also includes an important
18038 authority update and an important bugfix from 0.2.8.7. Everyone who
18039 sets the ReachableAddresses option, and all bridges, are strongly
18040 encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
18042 o Directory authority changes (also in 0.2.8.7):
18043 - The "Tonga" bridge authority has been retired; the new bridge
18044 authority is "Bifroest". Closes tickets 19728 and 19690.
18046 o Major bugfixes (client, security, also in 0.2.8.7):
18047 - Only use the ReachableAddresses option to restrict the first hop
18048 in a path. In earlier versions of 0.2.8.x, it would apply to
18049 every hop in the path, with a possible degradation in anonymity
18050 for anyone using an uncommon ReachableAddress setting. Fixes bug
18051 19973; bugfix on 0.2.8.2-alpha.
18053 o Major features (user interface):
18054 - Tor now supports the ability to declare options deprecated, so
18055 that we can recommend that people stop using them. Previously,
18056 this was done in an ad-hoc way. Closes ticket 19820.
18058 o Major bugfixes (directory downloads):
18059 - Avoid resetting download status for consensuses hourly, since we
18060 already have another, smarter retry mechanism. Fixes bug 8625;
18061 bugfix on 0.2.0.9-alpha.
18063 o Minor features (config):
18064 - Warn users when descriptor and port addresses are inconsistent.
18065 Mitigates bug 13953; patch by teor.
18067 o Minor features (geoip):
18068 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
18071 o Minor features (user interface):
18072 - There is a new --list-deprecated-options command-line option to
18073 list all of the deprecated options. Implemented as part of
18076 o Minor bugfixes (code style):
18077 - Fix an integer signedness conversion issue in the case conversion
18078 tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
18080 o Minor bugfixes (compilation):
18081 - Build correctly on versions of libevent2 without support for
18082 evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
18084 - Fix a compilation warning on GCC versions before 4.6. Our
18085 ENABLE_GCC_WARNING macro used the word "warning" as an argument,
18086 when it is also required as an argument to the compiler pragma.
18087 Fixes bug 19901; bugfix on 0.2.9.1-alpha.
18089 o Minor bugfixes (compilation, also in 0.2.8.7):
18090 - Remove an inappropriate "inline" in tortls.c that was causing
18091 warnings on older versions of GCC. Fixes bug 19903; bugfix
18094 o Minor bugfixes (fallback directories, also in 0.2.8.7):
18095 - Avoid logging a NULL string pointer when loading fallback
18096 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
18097 and 0.2.8.1-alpha. Report and patch by "rubiate".
18099 o Minor bugfixes (logging):
18100 - Log a more accurate message when we fail to dump a microdescriptor.
18101 Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
18103 o Minor bugfixes (memory leak):
18104 - Fix a series of slow memory leaks related to parsing torrc files
18105 and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
18107 o Deprecated features:
18108 - A number of DNS-cache-related sub-options for client ports are now
18109 deprecated for security reasons, and may be removed in a future
18110 version of Tor. (We believe that client-side DNS caching is a bad
18111 idea for anonymity, and you should not turn it on.) The options
18112 are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
18113 UseIPv4Cache, and UseIPv6Cache.
18114 - A number of options are deprecated for security reasons, and may
18115 be removed in a future version of Tor. The options are:
18116 AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
18117 AllowSingleHopExits, ClientDNSRejectInternalAddresses,
18118 CloseHSClientCircuitsImmediatelyOnTimeout,
18119 CloseHSServiceRendCircuitsImmediatelyOnTimeout,
18120 ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
18121 UseNTorHandshake, and WarnUnsafeSocks.
18122 - The *ListenAddress options are now deprecated as unnecessary: the
18123 corresponding *Port options should be used instead. These options
18124 may someday be removed. The affected options are:
18125 ControlListenAddress, DNSListenAddress, DirListenAddress,
18126 NATDListenAddress, ORListenAddress, SocksListenAddress,
18127 and TransListenAddress.
18130 - Correct the IPv6 syntax in our documentation for the
18131 VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
18134 - We no longer include the (dead, deprecated) bufferevent code in
18135 Tor. Closes ticket 19450. Based on a patch from U+039b.
18138 Changes in version 0.2.8.7 - 2016-08-24
18139 Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
18140 option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
18141 who sets the ReachableAddresses option, and all bridges, are strongly
18142 encouraged to upgrade.
18144 o Directory authority changes:
18145 - The "Tonga" bridge authority has been retired; the new bridge
18146 authority is "Bifroest". Closes tickets 19728 and 19690.
18148 o Major bugfixes (client, security):
18149 - Only use the ReachableAddresses option to restrict the first hop
18150 in a path. In earlier versions of 0.2.8.x, it would apply to
18151 every hop in the path, with a possible degradation in anonymity
18152 for anyone using an uncommon ReachableAddress setting. Fixes bug
18153 19973; bugfix on 0.2.8.2-alpha.
18155 o Minor features (geoip):
18156 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
18159 o Minor bugfixes (compilation):
18160 - Remove an inappropriate "inline" in tortls.c that was causing
18161 warnings on older versions of GCC. Fixes bug 19903; bugfix
18164 o Minor bugfixes (fallback directories):
18165 - Avoid logging a NULL string pointer when loading fallback
18166 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
18167 and 0.2.8.1-alpha. Report and patch by "rubiate".
18170 Changes in version 0.2.9.1-alpha - 2016-08-08
18171 Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
18172 series. It improves our support for hardened builds and compiler
18173 warnings, deploys some critical infrastructure for improvements to
18174 hidden services, includes a new timing backend that we hope to use for
18175 better support for traffic padding, makes it easier for programmers to
18176 log unexpected events, and contains other small improvements to
18177 security, correctness, and performance.
18179 Below are the changes since 0.2.8.6.
18181 o New system requirements:
18182 - Tor now requires Libevent version 2.0.10-stable or later. Older
18183 versions of Libevent have less efficient backends for several
18184 platforms, and lack the DNS code that we use for our server-side
18185 DNS support. This implements ticket 19554.
18186 - Tor now requires zlib version 1.2 or later, for security,
18187 efficiency, and (eventually) gzip support. (Back when we started,
18188 zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
18189 released in 2003. We recommend the latest version.)
18191 o Major features (build, hardening):
18192 - Tor now builds with -ftrapv by default on compilers that support
18193 it. This option detects signed integer overflow (which C forbids),
18194 and turns it into a hard-failure. We do not apply this option to
18195 code that needs to run in constant time to avoid side-channels;
18196 instead, we use -fwrapv in that code. Closes ticket 17983.
18197 - When --enable-expensive-hardening is selected, stop applying the
18198 clang/gcc sanitizers to code that needs to run in constant time.
18199 Although we are aware of no introduced side-channels, we are not
18200 able to prove that there are none. Related to ticket 17983.
18202 o Major features (compilation):
18203 - Our big list of extra GCC warnings is now enabled by default when
18204 building with GCC (or with anything like Clang that claims to be
18205 GCC-compatible). To make all warnings into fatal compilation
18206 errors, pass --enable-fatal-warnings to configure. Closes
18208 - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
18209 turn on C and POSIX extensions. (Previously, we attempted to do
18210 this on an ad hoc basis.) Closes ticket 19139.
18212 o Major features (directory authorities, hidden services):
18213 - Directory authorities can now perform the shared randomness
18214 protocol specified by proposal 250. Using this protocol, directory
18215 authorities generate a global fresh random value every day. In the
18216 future, this value will be used by hidden services to select
18217 HSDirs. This release implements the directory authority feature;
18218 the hidden service side will be implemented in the future as part
18219 of proposal 224. Resolves ticket 16943; implements proposal 250.
18221 o Major features (downloading, random exponential backoff):
18222 - When we fail to download an object from a directory service, wait
18223 for an (exponentially increasing) randomized amount of time before
18224 retrying, rather than a fixed interval as we did before. This
18225 prevents a group of Tor instances from becoming too synchronized,
18226 or a single Tor instance from becoming too predictable, in its
18227 download schedule. Closes ticket 15942.
18229 o Major bugfixes (exit policies):
18230 - Avoid disclosing exit outbound bind addresses, configured port
18231 bind addresses, and local interface addresses in relay descriptors
18232 by default under ExitPolicyRejectPrivate. Instead, only reject
18233 these (otherwise unlisted) addresses if
18234 ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
18235 0.2.7.2-alpha. Patch by teor.
18237 o Major bugfixes (hidden service client):
18238 - Allow Tor clients with appropriate controllers to work with
18239 FetchHidServDescriptors set to 0. Previously, this option also
18240 disabled descriptor cache lookup, thus breaking hidden services
18241 entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
18243 o Minor features (build, hardening):
18244 - Detect and work around a libclang_rt problem that would prevent
18245 clang from finding __mulodi4() on some 32-bit platforms, and thus
18246 keep -ftrapv from linking on those systems. Closes ticket 19079.
18247 - When building on a system without runtime support for the runtime
18248 hardening options, try to log a useful warning at configuration
18249 time, rather than an incomprehensible warning at link time. If
18250 expensive hardening was requested, this warning becomes an error.
18251 Closes ticket 18895.
18253 o Minor features (code safety):
18254 - In our integer-parsing functions, ensure that maxiumum value we
18255 give is no smaller than the minimum value. Closes ticket 19063;
18258 o Minor features (controller):
18259 - Implement new GETINFO queries for all downloads that use
18260 download_status_t to schedule retries. This allows controllers to
18261 examine the schedule for pending downloads. Closes ticket 19323.
18262 - Allow controllers to configure basic client authorization on
18263 hidden services when they create them with the ADD_ONION control
18264 command. Implements ticket 15588. Patch by "special".
18265 - Fire a STATUS_SERVER controller event whenever the hibernation
18266 status changes between "awake"/"soft"/"hard". Closes ticket 18685.
18268 o Minor features (directory authority):
18269 - Directory authorities now only give the Guard flag to a relay if
18270 they are also giving it the Stable flag. This change allows us to
18271 simplify path selection for clients. It should have minimal effect
18272 in practice, since >99% of Guards already have the Stable flag.
18273 Implements ticket 18624.
18274 - Directory authorities now write their v3-status-votes file out to
18275 disk earlier in the consensus process, so we have a record of the
18276 votes even if we abort the consensus process. Resolves
18279 o Minor features (hidden service):
18280 - Stop being so strict about the payload length of "rendezvous1"
18281 cells. We used to be locked in to the "TAP" handshake length, and
18282 now we can handle better handshakes like "ntor". Resolves
18285 o Minor features (infrastructure, time):
18286 - Tor now uses the operating system's monotonic timers (where
18287 available) for internal fine-grained timing. Previously we would
18288 look at the system clock, and then attempt to compensate for the
18289 clock running backwards. Closes ticket 18908.
18290 - Tor now includes an improved timer backend, so that we can
18291 efficiently support tens or hundreds of thousands of concurrent
18292 timers, as will be needed for some of our planned anti-traffic-
18293 analysis work. This code is based on William Ahern's "timeout.c"
18294 project, which implements a "tickless hierarchical timing wheel".
18295 Closes ticket 18365.
18297 o Minor features (logging):
18298 - Provide a more useful warning message when configured with an
18299 invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
18300 - When dumping unparseable router descriptors, optionally store them
18301 in separate files, named by digest, up to a configurable size
18302 limit. You can change the size limit by setting the
18303 MaxUnparseableDescSizeToLog option, and disable this feature by
18304 setting that option to 0. Closes ticket 18322.
18305 - Add a set of macros to check nonfatal assertions, for internal
18306 use. Migrating more of our checks to these should help us avoid
18307 needless crash bugs. Closes ticket 18613.
18309 o Minor features (performance):
18310 - Change the "optimistic data" extension from "off by default" to
18311 "on by default". The default was ordinarily overridden by a
18312 consensus option, but when clients were bootstrapping for the
18313 first time, they would not have a consensus to get the option
18314 from. Changing this default saves a round-trip during startup.
18315 Closes ticket 18815.
18317 o Minor features (relay, usability):
18318 - When the directory authorities refuse a bad relay's descriptor,
18319 encourage the relay operator to contact us. Many relay operators
18320 won't notice this line in their logs, but it's a win if even a few
18321 learn why we don't like what their relay was doing. Resolves
18324 o Minor features (testing):
18325 - Let backtrace tests work correctly under AddressSanitizer. Fixes
18326 part of bug 18934; bugfix on 0.2.5.2-alpha.
18327 - Move the test-network.sh script to chutney, and modify tor's test-
18328 network.sh to call the (newer) chutney version when available.
18329 Resolves ticket 19116. Patch by teor.
18330 - Use the lcov convention for marking lines as unreachable, so that
18331 we don't count them when we're generating test coverage data.
18332 Update our coverage tools to understand this convention. Closes
18335 o Minor bugfixes (bootstrap):
18336 - Remember the directory we fetched the consensus or previous
18337 certificates from, and use it to fetch future authority
18338 certificates. This change improves bootstrapping performance.
18339 Fixes bug 18963; bugfix on 0.2.8.1-alpha.
18341 o Minor bugfixes (build):
18342 - The test-stem and test-network makefile targets now depend only on
18343 the tor binary that they are testing. Previously, they depended on
18344 "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
18345 patch from "cypherpunks".
18347 o Minor bugfixes (circuits):
18348 - Make sure extend_info_from_router() is only called on servers.
18349 Fixes bug 19639; bugfix on 0.2.8.1-alpha.
18351 o Minor bugfixes (compilation):
18352 - When building with Clang, use a full set of GCC warnings.
18353 (Previously, we included only a subset, because of the way we
18354 detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
18356 o Minor bugfixes (directory authority):
18357 - Authorities now sort the "package" lines in their votes, for ease
18358 of debugging. (They are already sorted in consensus documents.)
18359 Fixes bug 18840; bugfix on 0.2.6.3-alpha.
18360 - When parsing a detached signature, make sure we use the length of
18361 the digest algorithm instead of an hardcoded DIGEST256_LEN in
18362 order to avoid comparing bytes out-of-bounds with a smaller digest
18363 length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
18365 o Minor bugfixes (documentation):
18366 - Document the --passphrase-fd option in the tor manpage. Fixes bug
18367 19504; bugfix on 0.2.7.3-rc.
18368 - Fix the description of the --passphrase-fd option in the
18369 tor-gencert manpage. The option is used to pass the number of a
18370 file descriptor to read the passphrase from, not to read the file
18371 descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
18373 o Minor bugfixes (ephemeral hidden service):
18374 - When deleting an ephemeral hidden service, close its intro points
18375 even if they are not completely open. Fixes bug 18604; bugfix
18378 o Minor bugfixes (guard selection):
18379 - Use a single entry guard even if the NumEntryGuards consensus
18380 parameter is not provided. Fixes bug 17688; bugfix
18382 - Don't mark guards as unreachable if connection_connect() fails.
18383 That function fails for local reasons, so it shouldn't reveal
18384 anything about the status of the guard. Fixes bug 14334; bugfix
18387 o Minor bugfixes (hidden service client):
18388 - Increase the minimum number of internal circuits we preemptively
18389 build from 2 to 3, so a circuit is available when a client
18390 connects to another onion service. Fixes bug 13239; bugfix
18393 o Minor bugfixes (logging):
18394 - When logging a directory ownership mismatch, log the owning
18395 username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
18397 o Minor bugfixes (memory leaks):
18398 - Fix a small, uncommon memory leak that could occur when reading a
18399 truncated ed25519 key file. Fixes bug 18956; bugfix
18402 o Minor bugfixes (testing):
18403 - Allow clients to retry HSDirs much faster in test networks. Fixes
18404 bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
18405 - Disable ASAN's detection of segmentation faults while running
18406 test_bt.sh, so that we can make sure that our own backtrace
18407 generation code works. Fixes another aspect of bug 18934; bugfix
18408 on 0.2.5.2-alpha. Patch from "cypherpunks".
18409 - Fix the test-network-all target on out-of-tree builds by using the
18410 correct path to the test driver script. Fixes bug 19421; bugfix
18413 o Minor bugfixes (time):
18414 - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
18415 bugfix on all released tor versions.
18416 - When computing the difference between two times in milliseconds,
18417 we now round to the nearest millisecond correctly. Previously, we
18418 could sometimes round in the wrong direction. Fixes bug 19428;
18419 bugfix on 0.2.2.2-alpha.
18421 o Minor bugfixes (user interface):
18422 - Display a more accurate number of suppressed messages in the log
18423 rate-limiter. Previously, there was a potential integer overflow
18424 in the counter. Now, if the number of messages hits a maximum, the
18425 rate-limiter doesn't count any further. Fixes bug 19435; bugfix
18427 - Fix a typo in the passphrase prompt for the ed25519 identity key.
18428 Fixes bug 19503; bugfix on 0.2.7.2-alpha.
18430 o Code simplification and refactoring:
18431 - Remove redundant declarations of the MIN macro. Closes
18433 - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
18434 Closes ticket 18462; patch from "icanhasaccount".
18435 - Split the 600-line directory_handle_command_get function into
18436 separate functions for different URL types. Closes ticket 16698.
18439 - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
18440 ticket 19153. Patch from "U+039b".
18442 o Removed features:
18443 - Remove support for "GET /tor/bytes.txt" DirPort request, and
18444 "GETINFO dir-usage" controller request, which were only available
18445 via a compile-time option in Tor anyway. Feature was added in
18446 0.2.2.1-alpha. Resolves ticket 19035.
18447 - There is no longer a compile-time option to disable support for
18448 TransPort. (If you don't want TransPort; just don't use it.) Patch
18449 from "U+039b". Closes ticket 19449.
18452 - Run more workqueue tests as part of "make check". These had
18453 previously been implemented, but you needed to know special
18454 command-line options to enable them.
18455 - We now have unit tests for our code to reject zlib "compression
18456 bombs". (Fortunately, the code works fine.)
18459 Changes in version 0.2.8.6 - 2016-08-02
18461 Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
18463 The Tor 0.2.8 series improves client bootstrapping performance,
18464 completes the authority-side implementation of improved identity
18465 keys for relays, and includes numerous bugfixes and performance
18466 improvements throughout the program. This release continues to
18467 improve the coverage of Tor's test suite. For a full list of
18468 changes since Tor 0.2.7, see the ReleaseNotes file.
18470 Changes since 0.2.8.5-rc:
18472 o Minor features (geoip):
18473 - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
18476 o Minor bugfixes (compilation):
18477 - Fix a compilation warning in the unit tests on systems where char
18478 is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
18480 o Minor bugfixes (fallback directories):
18481 - Remove 1 fallback that was on the hardcoded list, then opted-out,
18482 leaving 89 of the 100 fallbacks originally introduced in Tor
18483 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
18485 o Minor bugfixes (Linux seccomp2 sandbox):
18486 - Allow more syscalls when running with "Sandbox 1" enabled:
18487 sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
18488 some systems, these are required for Tor to start. Fixes bug
18489 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
18490 - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
18491 so that get_interface_address6_via_udp_socket_hack() can work.
18492 Fixes bug 19660; bugfix on 0.2.5.1-alpha.
18495 Changes in version 0.2.8.5-rc - 2016-07-07
18496 Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
18497 series. If we find no new bugs or regressions here, the first stable
18498 0.2.8 release will be identical to it. It has a few small bugfixes
18499 against previous versions.
18501 o Directory authority changes:
18502 - Urras is no longer a directory authority. Closes ticket 19271.
18504 o Major bugfixes (heartbeat):
18505 - Fix a regression that would crash Tor when the periodic
18506 "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
18507 0.2.8.1-alpha. Reported by "kubaku".
18509 o Minor features (build):
18510 - Tor now again builds with the recent OpenSSL 1.1 development
18511 branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
18512 - When building manual pages, set the timezone to "UTC", so that the
18513 output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
18514 Patch from intrigeri.
18516 o Minor bugfixes (fallback directory selection):
18517 - Avoid errors during fallback selection if there are no eligible
18518 fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
18521 o Minor bugfixes (IPv6, microdescriptors):
18522 - Don't check node addresses when we only have a routerstatus. This
18523 allows IPv6-only clients to bootstrap by fetching microdescriptors
18524 from fallback directory mirrors. (The microdescriptor consensus
18525 has no IPv6 addresses in it.) Fixes bug 19608; bugfix
18528 o Minor bugfixes (logging):
18529 - Reduce pointlessly verbose log messages when directory servers
18530 can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
18531 0.2.8.1-alpha. Patch by teor.
18532 - When a fallback directory changes its fingerprint from the hard-
18533 coded fingerprint, log a less severe, more explanatory log
18534 message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
18536 o Minor bugfixes (Linux seccomp2 sandboxing):
18537 - Allow statistics to be written to disk when "Sandbox 1" is
18538 enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
18539 0.2.6.1-alpha respectively.
18541 o Minor bugfixes (user interface):
18542 - Remove a warning message "Service [scrubbed] not found after
18543 descriptor upload". This message appears when one uses HSPOST
18544 control command to upload a service descriptor. Since there is
18545 only a descriptor and no service, showing this message is
18546 pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
18548 o Fallback directory list:
18549 - Add a comment to the generated fallback directory list that
18550 explains how to comment out unsuitable fallbacks in a way that's
18551 compatible with the stem fallback parser.
18552 - Update fallback whitelist and blacklist based on relay operator
18553 emails. Blacklist unsuitable (non-working, over-volatile)
18554 fallbacks. Resolves ticket 19071. Patch by teor.
18555 - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
18556 originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
18557 ticket 19071; patch by teor.
18560 Changes in version 0.2.8.4-rc - 2016-06-15
18561 Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
18562 If we find no new bugs or regressions here, the first stable 0.2.8
18563 release will be identical to it. It has a few small bugfixes against
18566 o Major bugfixes (user interface):
18567 - Correctly give a warning in the cases where a relay is specified
18568 by nickname, and one such relay is found, but it is not officially
18569 Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
18571 o Minor features (build):
18572 - Tor now builds once again with the recent OpenSSL 1.1 development
18573 branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
18575 o Minor features (geoip):
18576 - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
18579 o Minor bugfixes (compilation):
18580 - Cause the unit tests to compile correctly on mingw64 versions that
18581 lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
18583 o Minor bugfixes (downloading):
18584 - Predict more correctly whether we'll be downloading over HTTP when
18585 we determine the maximum length of a URL. This should avoid a
18586 "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
18590 Changes in version 0.2.8.3-alpha - 2016-05-26
18591 Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
18592 the course of the 0.2.8 development cycle. It improves the behavior of
18593 directory clients, fixes several crash bugs, fixes a gap in compiler
18594 hardening, and allows the full integration test suite to run on
18597 o Major bugfixes (security, client, DNS proxy):
18598 - Stop a crash that could occur when a client running with DNSPort
18599 received a query with multiple address types, and the first
18600 address type was not supported. Found and fixed by Scott Dial.
18601 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
18603 o Major bugfixes (security, compilation):
18604 - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
18605 is predefined. Previously, our use of -D_FORTIFY_SOURCE would
18606 cause a compiler warning, thereby making other checks fail, and
18607 needlessly disabling compiler-hardening support. Fixes one case of
18608 bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
18610 o Major bugfixes (security, directory authorities):
18611 - Fix a crash and out-of-bounds write during authority voting, when
18612 the list of relays includes duplicate ed25519 identity keys. Fixes
18613 bug 19032; bugfix on 0.2.8.2-alpha.
18615 o Major bugfixes (client, bootstrapping):
18616 - Check if bootstrap consensus downloads are still needed when the
18617 linked connection attaches. This prevents tor making unnecessary
18618 begindir-style connections, which are the only directory
18619 connections tor clients make since the fix for 18483 was merged.
18620 - Fix some edge cases where consensus download connections may not
18621 have been closed, even though they were not needed. Related to fix
18623 - Make relays retry consensus downloads the correct number of times,
18624 rather than the more aggressive client retry count. Fixes part of
18626 - Stop downloading consensuses when we have a consensus, even if we
18627 don't have all the certificates for it yet. Fixes bug 18809;
18628 bugfix on 0.2.8.1-alpha. Patches by arma and teor.
18630 o Major bugfixes (directory mirrors):
18631 - Decide whether to advertise begindir support in the the same way
18632 we decide whether to advertise our DirPort. Allowing these
18633 decisions to become out-of-sync led to surprising behavior like
18634 advertising begindir support when hibernation made us not
18635 advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
18638 o Major bugfixes (IPv6 bridges, client):
18639 - Actually use IPv6 addresses when selecting directory addresses for
18640 IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
18643 o Major bugfixes (key management):
18644 - If OpenSSL fails to generate an RSA key, do not retain a dangling
18645 pointer to the previous (uninitialized) key value. The impact here
18646 should be limited to a difficult-to-trigger crash, if OpenSSL is
18647 running an engine that makes key generation failures possible, or
18648 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
18649 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
18652 o Major bugfixes (testing):
18653 - Fix a bug that would block 'make test-network-all' on systems where
18654 IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
18655 - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
18656 bugfix on 0.2.8.1-alpha.
18658 o Minor features (clients):
18659 - Make clients, onion services, and bridge relays always use an
18660 encrypted begindir connection for directory requests. Resolves
18661 ticket 18483. Patch by "teor".
18663 o Minor features (fallback directory mirrors):
18664 - Give each fallback the same weight for client selection; restrict
18665 fallbacks to one per operator; report fallback directory detail
18666 changes when rebuilding list; add new fallback directory mirrors
18667 to the whitelist; and many other minor simplifications and fixes.
18668 Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
18669 0.2.8.1-alpha; patch by "teor".
18670 - Replace the 21 fallbacks generated in January 2016 and included in
18671 Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
18672 2016. Closes task 17158; patch by "teor".
18674 o Minor features (geoip):
18675 - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
18678 o Minor bugfixes (assert, portability):
18679 - Fix an assertion failure in memarea.c on systems where "long" is
18680 shorter than the size of a pointer. Fixes bug 18716; bugfix
18683 o Minor bugfixes (bootstrap):
18684 - Consistently use the consensus download schedule for authority
18685 certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
18687 o Minor bugfixes (build):
18688 - Remove a pair of redundant AM_CONDITIONAL declarations from
18689 configure.ac. Fixes one final case of bug 17744; bugfix
18691 - Resolve warnings when building on systems that are concerned with
18692 signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
18694 - When libscrypt.h is found, but no libscrypt library can be linked,
18695 treat libscrypt as absent. Fixes bug 19161; bugfix
18698 o Minor bugfixes (client):
18699 - Turn all TestingClientBootstrap* into non-testing torrc options.
18700 This changes simply renames them by removing "Testing" in front of
18701 them and they do not require TestingTorNetwork to be enabled
18702 anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
18703 - Make directory node selection more reliable, mainly for IPv6-only
18704 clients and clients with few reachable addresses. Fixes bug 18929;
18705 bugfix on 0.2.8.1-alpha. Patch by "teor".
18707 o Minor bugfixes (controller, microdescriptors):
18708 - Make GETINFO dir/status-vote/current/consensus conform to the
18709 control specification by returning "551 Could not open cached
18710 consensus..." when not caching consensuses. Fixes bug 18920;
18711 bugfix on 0.2.2.6-alpha.
18713 o Minor bugfixes (crypto, portability):
18714 - The SHA3 and SHAKE routines now produce the correct output on Big
18715 Endian systems. No code calls either algorithm yet, so this is
18716 primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
18717 - Tor now builds again with the recent OpenSSL 1.1 development
18718 branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
18721 o Minor bugfixes (directories):
18722 - When fetching extrainfo documents, compare their SHA256 digests
18723 and Ed25519 signing key certificates with the routerinfo that led
18724 us to fetch them, rather than with the most recent routerinfo.
18725 Otherwise we generate many spurious warnings about mismatches.
18726 Fixes bug 17150; bugfix on 0.2.7.2-alpha.
18728 o Minor bugfixes (logging):
18729 - When we can't generate a signing key because OfflineMasterKey is
18730 set, do not imply that we should have been able to load it. Fixes
18731 bug 18133; bugfix on 0.2.7.2-alpha.
18732 - Stop periodic_event_dispatch() from blasting twelve lines per
18733 second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
18734 - When rejecting a misformed INTRODUCE2 cell, only log at
18735 PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
18737 o Minor bugfixes (pluggable transports):
18738 - Avoid reporting a spurious error when we decide that we don't need
18739 to terminate a pluggable transport because it has already exited.
18740 Fixes bug 18686; bugfix on 0.2.5.5-alpha.
18742 o Minor bugfixes (pointer arithmetic):
18743 - Fix a bug in memarea_alloc() that could have resulted in remote
18744 heap write access, if Tor had ever passed an unchecked size to
18745 memarea_alloc(). Fortunately, all the sizes we pass to
18746 memarea_alloc() are pre-checked to be less than 128 kilobytes.
18747 Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
18750 o Minor bugfixes (relays):
18751 - Consider more config options when relays decide whether to
18752 regenerate their descriptor. Fixes more of bug 12538; bugfix
18754 - Resolve some edge cases where we might launch an ORPort
18755 reachability check even when DisableNetwork is set. Noticed while
18756 fixing bug 18616; bugfix on 0.2.3.9-alpha.
18758 o Minor bugfixes (statistics):
18759 - We now include consensus downloads via IPv6 in our directory-
18760 request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
18762 o Minor bugfixes (testing):
18763 - Allow directories in small networks to bootstrap by skipping
18764 DirPort checks when the consensus has no exits. Fixes bug 19003;
18765 bugfix on 0.2.8.1-alpha. Patch by teor.
18766 - Fix a small memory leak that would occur when the
18767 TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
18768 bugfix on 0.2.5.2-alpha.
18770 o Minor bugfixes (time handling):
18771 - When correcting a corrupt 'struct tm' value, fill in the tm_wday
18772 field. Otherwise, our unit tests crash on Windows. Fixes bug
18773 18977; bugfix on 0.2.2.25-alpha.
18776 - Document the contents of the 'datadir/keys' subdirectory in the
18777 manual page. Closes ticket 17621.
18778 - Stop recommending use of nicknames to identify relays in our
18779 MapAddress documentation. Closes ticket 18312.
18782 Changes in version 0.2.8.2-alpha - 2016-03-28
18783 Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
18784 bugs in earlier versions of Tor, including some that prevented
18785 authorities using Tor 0.2.7.x from running correctly. IPv6 and
18786 directory support should also be much improved.
18788 o New system requirements:
18789 - Tor no longer supports versions of OpenSSL with a broken
18790 implementation of counter mode. (This bug was present in OpenSSL
18791 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
18792 longer runs with, these versions.
18793 - Tor no longer attempts to support platforms where the "time_t"
18794 type is unsigned. (To the best of our knowledge, only OpenVMS does
18795 this, and Tor has never actually built on OpenVMS.) Closes
18797 - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
18798 later (released in 2008 and 2009 respectively). If you are
18799 building Tor from the git repository instead of from the source
18800 distribution, and your tools are older than this, you will need to
18801 upgrade. Closes ticket 17732.
18803 o Major bugfixes (security, pointers):
18804 - Avoid a difficult-to-trigger heap corruption attack when extending
18805 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
18806 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
18807 Reported by Guido Vranken.
18809 o Major bugfixes (bridges, pluggable transports):
18810 - Modify the check for OR connections to private addresses. Allow
18811 bridges on private addresses, including pluggable transports that
18812 ignore the (potentially private) address in the bridge line. Fixes
18813 bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
18815 o Major bugfixes (compilation):
18816 - Repair hardened builds under the clang compiler. Previously, our
18817 use of _FORTIFY_SOURCE would conflict with clang's address
18818 sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
18820 o Major bugfixes (crash on shutdown):
18821 - Correctly handle detaching circuits from muxes when shutting down.
18822 Fixes bug 18116; bugfix on 0.2.8.1-alpha.
18823 - Fix an assert-on-exit bug related to counting memory usage in
18824 rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
18826 o Major bugfixes (crash on startup):
18827 - Fix a segfault during startup: If a Unix domain socket was
18828 configured as listener (such as a ControlSocket or a SocksPort
18829 "unix:" socket), and tor was started as root but not configured to
18830 switch to another user, tor would segfault while trying to string
18831 compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
18834 o Major bugfixes (dns proxy mode, crash):
18835 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
18836 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
18838 o Major bugfixes (relays, bridge clients):
18839 - Ensure relays always allow IPv4 OR and Dir connections. Ensure
18840 bridge clients use the address configured in the bridge line.
18841 Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
18844 o Major bugfixes (voting):
18845 - Actually enable support for authorities to match routers by their
18846 Ed25519 identities. Previously, the code had been written, but
18847 some debugging code that had accidentally been left in the
18848 codebase made it stay turned off. Fixes bug 17702; bugfix
18850 - When collating votes by Ed25519 identities, authorities now
18851 include a "NoEdConsensus" flag if the ed25519 value (or lack
18852 thereof) for a server does not reflect the majority consensus.
18853 Related to bug 17668; bugfix on 0.2.7.2-alpha.
18854 - When generating a vote with keypinning disabled, never include two
18855 entries for the same ed25519 identity. This bug was causing
18856 authorities to generate votes that they could not parse when a
18857 router violated key pinning by changing its RSA identity but
18858 keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
18859 18318. Bugfix on 0.2.7.2-alpha.
18861 o Minor features (security, win32):
18862 - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
18863 attack. Fixes bug 18123; bugfix on all tor versions. Patch
18866 o Minor features (bug-resistance):
18867 - Make Tor survive errors involving connections without a
18868 corresponding event object. Previously we'd fail with an
18869 assertion; now we produce a log message. Related to bug 16248.
18871 o Minor features (build):
18872 - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
18873 as having possible IPFW support. Closes ticket 18448. Patch from
18874 Steven Chamberlain.
18876 o Minor features (code hardening):
18877 - Use tor_snprintf() and tor_vsnprintf() even in external and low-
18878 level code, to harden against accidental failures to NUL-
18879 terminate. Part of ticket 17852. Patch from jsturgix. Found
18882 o Minor features (crypto):
18883 - Validate the hard-coded Diffie-Hellman parameters and ensure that
18884 p is a safe prime, and g is a suitable generator. Closes
18887 o Minor features (geoip):
18888 - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
18891 o Minor features (hidden service directory):
18892 - Streamline relay-side hsdir handling: when relays consider whether
18893 to accept an uploaded hidden service descriptor, they no longer
18894 check whether they are one of the relays in the network that is
18895 "supposed" to handle that descriptor. Implements ticket 18332.
18897 o Minor features (IPv6):
18898 - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
18899 to 1, tor prefers IPv6 directory addresses.
18900 - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
18901 avoids using IPv4 for client OR and directory connections.
18902 - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
18903 "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
18904 "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
18906 o Minor features (linux seccomp2 sandbox):
18907 - Reject attempts to change our Address with "Sandbox 1" enabled.
18908 Changing Address with Sandbox turned on would never actually work,
18909 but previously it would fail in strange and confusing ways. Found
18910 while fixing 18548.
18912 o Minor features (robustness):
18913 - Exit immediately with an error message if the code attempts to use
18914 Libevent without having initialized it. This should resolve some
18915 frequently-made mistakes in our unit tests. Closes ticket 18241.
18917 o Minor features (unix domain sockets):
18918 - Add a new per-socket option, RelaxDirModeCheck, to allow creating
18919 Unix domain sockets without checking the permissions on the parent
18920 directory. (Tor checks permissions by default because some
18921 operating systems only check permissions on the parent directory.
18922 However, some operating systems do look at permissions on the
18923 socket, and tor's default check is unneeded.) Closes ticket 18458.
18926 o Minor bugfixes (exit policies, security):
18927 - Refresh an exit relay's exit policy when interface addresses
18928 change. Previously, tor only refreshed the exit policy when the
18929 configured external address changed. Fixes bug 18208; bugfix on
18930 0.2.7.3-rc. Patch by teor.
18932 o Minor bugfixes (security, hidden services):
18933 - Prevent hidden services connecting to client-supplied rendezvous
18934 addresses that are reserved as internal or multicast. Fixes bug
18935 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
18937 o Minor bugfixes (build):
18938 - Do not link the unit tests against both the testing and non-
18939 testing versions of the static libraries. Fixes bug 18490; bugfix
18941 - Avoid spurious failures from configure files related to calling
18942 exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
18943 0.2.0.1-alpha. Patch from "cypherpunks".
18944 - Silence spurious clang-scan warnings in the ed25519_donna code by
18945 explicitly initializing some objects. Fixes bug 18384; bugfix on
18946 0.2.7.2-alpha. Patch by teor.
18948 o Minor bugfixes (client, bootstrap):
18949 - Count receipt of new microdescriptors as progress towards
18950 bootstrapping. Previously, with EntryNodes set, Tor might not
18951 successfully repopulate the guard set on bootstrapping. Fixes bug
18952 16825; bugfix on 0.2.3.1-alpha.
18954 o Minor bugfixes (code correctness):
18955 - Update to the latest version of Trunnel, which tries harder to
18956 avoid generating code that can invoke memcpy(p,NULL,0). Bug found
18957 by clang address sanitizer. Fixes bug 18373; bugfix
18960 o Minor bugfixes (configuration):
18961 - Fix a tiny memory leak when parsing a port configuration ending in
18962 ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
18964 o Minor bugfixes (containers):
18965 - If we somehow attempt to construct a heap with more than
18966 1073741822 elements, avoid an integer overflow when maintaining
18967 the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
18969 o Minor bugfixes (correctness):
18970 - Fix a bad memory handling bug that would occur if we had queued a
18971 cell on a channel's incoming queue. Fortunately, we can't actually
18972 queue a cell like that as our code is constructed today, but it's
18973 best to avoid this kind of error, even if there isn't any code
18974 that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
18976 o Minor bugfixes (directory):
18977 - When generating a URL for a directory server on an IPv6 address,
18978 wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
18979 on 0.2.3.9-alpha. Patch from Malek.
18981 o Minor bugfixes (fallback directory mirrors):
18982 - When requesting extrainfo descriptors from a trusted directory
18983 server, check whether it is an authority or a fallback directory
18984 which supports extrainfo descriptors. Fixes bug 18489; bugfix on
18985 0.2.4.7-alpha. Reported by atagar, patch by teor.
18987 o Minor bugfixes (hidden service, client):
18988 - Handle the case where the user makes several fast consecutive
18989 requests to the same .onion address. Previously, the first six
18990 requests would each trigger a descriptor fetch, each picking a
18991 directory (there are 6 overall) and the seventh one would fail
18992 because no directories were left, thereby triggering a close on
18993 all current directory connections asking for the hidden service.
18994 The solution here is to not close the connections if we have
18995 pending directory fetches. Fixes bug 15937; bugfix
18998 o Minor bugfixes (hidden service, control port):
18999 - Add the onion address to the HS_DESC event for the UPLOADED action
19000 both on success or failure. It was previously hardcoded with
19001 UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
19003 o Minor bugfixes (hidden service, directory):
19004 - Bridges now refuse "rendezvous2" (hidden service descriptor)
19005 publish attempts. Suggested by ticket 18332.
19007 o Minor bugfixes (linux seccomp2 sandbox):
19008 - Allow the setrlimit syscall, and the prlimit and prlimit64
19009 syscalls, which some libc implementations use under the hood.
19010 Fixes bug 15221; bugfix on 0.2.5.1-alpha.
19011 - Avoid a 10-second delay when starting as a client with "Sandbox 1"
19012 enabled and no DNS resolvers configured. This should help TAILS
19013 start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
19014 - Fix the sandbox's interoperability with unix domain sockets under
19015 setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
19017 o Minor bugfixes (logging):
19018 - When logging information about an unparsable networkstatus vote or
19019 consensus, do not say "vote" when we mean consensus. Fixes bug
19020 18368; bugfix on 0.2.0.8-alpha.
19021 - Scrub service name in "unrecognized service ID" log messages.
19022 Fixes bug 18600; bugfix on 0.2.4.11-alpha.
19023 - Downgrade logs and backtraces about IP versions to info-level.
19024 Only log backtraces once each time tor runs. Assists in diagnosing
19025 bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
19026 Christian, patch by teor.
19028 o Minor bugfixes (memory safety):
19029 - Avoid freeing an uninitialized pointer when opening a socket fails
19030 in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
19031 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
19033 - Correctly duplicate addresses in get_interface_address6_list().
19034 Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
19035 patch by "cypherpunks".
19036 - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
19038 - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
19039 18672; bugfix on 0.2.5.1-alpha.
19041 o Minor bugfixes (private directory):
19042 - Prevent a race condition when creating private directories. Fixes
19043 part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
19044 Patch from jsturgix. Found with Flawfinder.
19046 o Minor bugfixes (test networks, IPv6):
19047 - Allow internal IPv6 addresses in descriptors in test networks.
19048 Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
19051 o Minor bugfixes (testing):
19052 - We no longer disable assertions in the unit tests when coverage is
19053 enabled. Instead, we require you to say --disable-asserts-in-tests
19054 to the configure script if you need assertions disabled in the
19055 unit tests (for example, if you want to perform branch coverage).
19056 Fixes bug 18242; bugfix on 0.2.7.1-alpha.
19058 o Minor bugfixes (time parsing):
19059 - Avoid overflow in tor_timegm when parsing dates in and after 2038
19060 on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
19061 0.0.2pre14. Patch by teor.
19063 o Minor bugfixes (tor-gencert):
19064 - Correctly handle the case where an authority operator enters a
19065 passphrase but sends an EOF before sending a newline. Fixes bug
19066 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
19068 o Code simplification and refactoring:
19069 - Quote all the string interpolations in configure.ac -- even those
19070 which we are pretty sure can't contain spaces. Closes ticket
19071 17744. Patch from zerosion.
19072 - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
19073 inplace, so there's no need to have a separate implementation for
19074 the non-inplace code. Closes ticket 18258. Patch from Malek.
19075 - Simplify return types for some crypto functions that can't
19076 actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
19079 - Change build messages to refer to "Fedora" instead of "Fedora
19080 Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
19081 Patches from "icanhasaccount" and "cypherpunks".
19083 o Removed features:
19084 - We no longer maintain an internal freelist in memarea.c.
19085 Allocators should be good enough to make this code unnecessary,
19086 and it's doubtful that it ever had any performance benefit.
19089 - Fix several warnings from clang's address sanitizer produced in
19091 - Treat backtrace test failures as expected on FreeBSD until we
19092 solve bug 17808. Closes ticket 18204.
19095 Changes in version 0.2.8.1-alpha - 2016-02-04
19096 Tor 0.2.8.1-alpha is the first alpha release in its series. It
19097 includes numerous small features and bugfixes against previous Tor
19098 versions, and numerous small infrastructure improvements. The most
19099 notable features are a set of improvements to the directory subsystem.
19101 o Major features (security, Linux):
19102 - When Tor starts as root on Linux and is told to switch user ID, it
19103 can now retain the capability to bind to low ports. By default,
19104 Tor will do this only when it's switching user ID and some low
19105 ports have been configured. You can change this behavior with the
19106 new option KeepBindCapabilities. Closes ticket 8195.
19108 o Major features (directory system):
19109 - When bootstrapping multiple consensus downloads at a time, use the
19110 first one that starts downloading, and close the rest. This
19111 reduces failures when authorities or fallback directories are slow
19112 or down. Together with the code for feature 15775, this feature
19113 should reduces failures due to fallback churn. Implements ticket
19114 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
19115 "mikeperry" and "teor".
19116 - Include a trial list of 21 default fallback directories, generated
19117 in January 2016, based on an opt-in survey of suitable relays.
19118 Doing this should make clients bootstrap more quickly and reliably,
19119 and reduce the load on the directory authorities. Closes ticket
19120 15775. Patch by "teor".
19121 Candidates identified using an OnionOO script by "weasel", "teor",
19122 "gsathya", and "karsten".
19123 - Previously only relays that explicitly opened a directory port
19124 (DirPort) accepted directory requests from clients. Now all
19125 relays, with and without a DirPort, accept and serve tunneled
19126 directory requests that they receive through their ORPort. You can
19127 disable this behavior using the new DirCache option. Closes
19130 o Major key updates:
19131 - Update the V3 identity key for the dannenberg directory authority:
19132 it was changed on 18 November 2015. Closes task 17906. Patch
19135 o Minor features (security, clock):
19136 - Warn when the system clock appears to move back in time (when the
19137 state file was last written in the future). Tor doesn't know that
19138 consensuses have expired if the clock is in the past. Patch by
19139 "teor". Implements ticket 17188.
19141 o Minor features (security, exit policies):
19142 - ExitPolicyRejectPrivate now rejects more private addresses by
19143 default. Specifically, it now rejects the relay's outbound bind
19144 addresses (if configured), and the relay's configured port
19145 addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
19146 0.2.0.11-alpha. Patch by "teor".
19148 o Minor features (security, memory erasure):
19149 - Set the unused entries in a smartlist to NULL. This helped catch
19150 a (harmless) bug, and shouldn't affect performance too much.
19151 Implements ticket 17026.
19152 - Use SecureMemoryWipe() function to securely clean memory on
19153 Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
19154 Implements feature 17986.
19155 - Use explicit_bzero or memset_s when present. Previously, we'd use
19156 OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
19157 from <logan@hackers.mu> and <selven@hackers.mu>.
19158 - Make memwipe() do nothing when passed a NULL pointer or buffer of
19159 zero size. Check size argument to memwipe() for underflow. Fixes
19160 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
19163 o Minor features (security, RNG):
19164 - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
19165 positively are not allowed to fail. Previously we depended on
19166 internal details of OpenSSL's behavior. Closes ticket 17686.
19167 - Never use the system entropy output directly for anything besides
19168 seeding the PRNG. When we want to generate important keys, instead
19169 of using system entropy directly, we now hash it with the PRNG
19170 stream. This may help resist certain attacks based on broken OS
19171 entropy implementations. Closes part of ticket 17694.
19172 - Use modern system calls (like getentropy() or getrandom()) to
19173 generate strong entropy on platforms that have them. Closes
19176 o Minor features (accounting):
19177 - Added two modes to the AccountingRule option: One for limiting
19178 only the number of bytes sent ("AccountingRule out"), and one for
19179 limiting only the number of bytes received ("AccountingRule in").
19180 Closes ticket 15989; patch from "unixninja92".
19182 o Minor features (build):
19183 - Since our build process now uses "make distcheck", we no longer
19184 force "make dist" to depend on "make check". Closes ticket 17893;
19185 patch from "cypherpunks."
19186 - Tor now builds successfully with the recent OpenSSL 1.1
19187 development branch, and with the latest LibreSSL. Closes tickets
19188 17549, 17921, and 17984.
19190 o Minor features (controller):
19191 - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
19192 tickets 16774 and 17817. Patch by George Tankersley.
19193 - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
19194 service descriptor from a service's local hidden service
19195 descriptor cache. Closes ticket 14846.
19196 - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
19197 controllers can examine the the reject rules added by
19198 ExitPolicyRejectPrivate. This makes it easier for stem to display
19201 o Minor features (crypto):
19202 - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
19204 - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
19205 - When allocating a digest state object, allocate no more space than
19206 we actually need. Previously, we would allocate as much space as
19207 the state for the largest algorithm would need. This change saves
19208 up to 672 bytes per circuit. Closes ticket 17796.
19209 - Improve performance when hashing non-multiple of 8 sized buffers,
19210 based on Andrew Moon's public domain SipHash-2-4 implementation.
19211 Fixes bug 17544; bugfix on 0.2.5.3-alpha.
19213 o Minor features (directory downloads):
19214 - Wait for busy authorities and fallback directories to become non-
19215 busy when bootstrapping. (A similar change was made in 6c443e987d
19216 for directory caches chosen from the consensus.) Closes ticket
19217 17864; patch by "teor".
19218 - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
19219 directory mirrors. The default is 1; set it to 0 to disable
19220 fallbacks. Implements ticket 17576. Patch by "teor".
19222 o Minor features (geoip):
19223 - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
19226 o Minor features (IPv6):
19227 - Add an argument 'ipv6=address:orport' to the DirAuthority and
19228 FallbackDir torrc options, to specify an IPv6 address for an
19229 authority or fallback directory. Add hard-coded ipv6 addresses for
19230 directory authorities that have them. Closes ticket 17327; patch
19231 from Nick Mathewson and "teor".
19232 - Add address policy assume_action support for IPv6 addresses.
19233 - Limit IPv6 mask bits to 128.
19234 - Warn when comparing against an AF_UNSPEC address in a policy, it's
19235 almost always a bug. Closes ticket 17863; patch by "teor".
19236 - Allow users to configure directory authorities and fallback
19237 directory servers with IPv6 addresses and ORPorts. Resolves
19239 - routerset_parse now accepts IPv6 literal addresses. Fixes bug
19240 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
19241 - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
19242 17638; bugfix on 0.0.2pre8. Patch by "teor".
19244 o Minor features (logging):
19245 - When logging to syslog, allow a tag to be added to the syslog
19246 identity (the string prepended to every log message). The tag can
19247 be configured with SyslogIdentityTag and defaults to none. Setting
19248 it to "foo" will cause logs to be tagged as "Tor-foo". Closes
19251 o Minor features (portability):
19252 - Use timingsafe_memcmp() where available. Closes ticket 17944;
19253 patch from <logan@hackers.mu>.
19255 o Minor features (relay, address discovery):
19256 - Add a family argument to get_interface_addresses_raw() and
19257 subfunctions to make network interface address interogation more
19258 efficient. Now Tor can specifically ask for IPv4, IPv6 or both
19259 types of interfaces from the operating system. Resolves
19261 - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
19262 fails to enumerate interface addresses using the platform-specific
19263 API, have it rely on the UDP socket fallback technique to try and
19264 find out what IP addresses (both IPv4 and IPv6) our machine has.
19265 Resolves ticket 17951.
19267 o Minor features (replay cache):
19268 - The replay cache now uses SHA256 instead of SHA1. Implements
19269 feature 8961. Patch by "teor", issue reported by "rransom".
19271 o Minor features (unix file permissions):
19272 - Defer creation of Unix sockets until after setuid. This avoids
19273 needing CAP_CHOWN and CAP_FOWNER when using systemd's
19274 CapabilityBoundingSet, or chown and fowner when using SELinux.
19275 Implements part of ticket 17562. Patch from Jamie Nguyen.
19276 - If any directory created by Tor is marked as group readable, the
19277 filesystem group is allowed to be either the default GID or the
19278 root user. Allowing root to read the DataDirectory prevents the
19279 need for CAP_READ_SEARCH when using systemd's
19280 CapabilityBoundingSet, or dac_read_search when using SELinux.
19281 Implements part of ticket 17562. Patch from Jamie Nguyen.
19282 - Introduce a new DataDirectoryGroupReadable option. If it is set to
19283 1, the DataDirectory will be made readable by the default GID.
19284 Implements part of ticket 17562. Patch from Jamie Nguyen.
19286 o Minor bugfixes (accounting):
19287 - The max bandwidth when using 'AccountRule sum' is now correctly
19288 logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
19289 from "unixninja92".
19291 o Minor bugfixes (code correctness):
19292 - When closing an entry connection, generate a warning if we should
19293 have sent an end cell for it but we haven't. Fixes bug 17876;
19294 bugfix on 0.2.3.2-alpha.
19295 - Assert that allocated memory held by the reputation code is freed
19296 according to its internal counters. Fixes bug 17753; bugfix
19298 - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
19301 o Minor bugfixes (compilation):
19302 - Mark all object files that include micro-revision.i as depending
19303 on it, so as to make parallel builds more reliable. Fixes bug
19304 17826; bugfix on 0.2.5.1-alpha.
19305 - Don't try to use the pthread_condattr_setclock() function unless
19306 it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
19307 17819; bugfix on 0.2.6.3-alpha.
19308 - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
19310 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
19311 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
19312 - Fix search for libevent libraries on OpenBSD (and other systems
19313 that install libevent 1 and libevent 2 in parallel). Fixes bug
19314 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
19315 - Isolate environment variables meant for tests from the rest of the
19316 build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
19317 - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
19319 - Remove config.log only from make distclean, not from make clean.
19320 Fixes bug 17924; bugfix on 0.2.4.1-alpha.
19322 o Minor bugfixes (crypto):
19323 - Check the return value of HMAC() and assert on failure. Fixes bug
19324 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
19326 o Minor bugfixes (fallback directories):
19327 - Mark fallbacks as "too busy" when they return a 503 response,
19328 rather than just marking authorities. Fixes bug 17572; bugfix on
19329 0.2.4.7-alpha. Patch by "teor".
19331 o Minor bugfixes (IPv6):
19332 - Update the limits in max_dl_per_request for IPv6 address length.
19333 Fixes bug 17573; bugfix on 0.2.1.5-alpha.
19335 o Minor bugfixes (linux seccomp2 sandbox):
19336 - Fix a crash when using offline master ed25519 keys with the Linux
19337 seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
19339 o Minor bugfixes (logging):
19340 - In log messages that include a function name, use __FUNCTION__
19341 instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
19342 with clang __PRETTY_FUNCTION__ has extra information we don't
19343 need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
19345 - Remove needless quotes from a log message about unparseable
19346 addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
19348 o Minor bugfixes (portability):
19349 - Remove an #endif from configure.ac so that we correctly detect the
19350 presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
19353 o Minor bugfixes (relays):
19354 - Check that both the ORPort and DirPort (if present) are reachable
19355 before publishing a relay descriptor. Otherwise, relays publish a
19356 descriptor with DirPort 0 when the DirPort reachability test takes
19357 longer than the ORPort reachability test. Fixes bug 18050; bugfix
19358 on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
19360 o Minor bugfixes (relays, hidden services):
19361 - Refuse connection requests to private OR addresses unless
19362 ExtendAllowPrivateAddresses is set. Previously, tor would connect,
19363 then refuse to send any cells to a private address. Fixes bugs
19364 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
19366 o Minor bugfixes (safe logging):
19367 - When logging a malformed hostname received through socks4, scrub
19368 it if SafeLogging says we should. Fixes bug 17419; bugfix
19371 o Minor bugfixes (statistics code):
19372 - Consistently check for overflow in round_*_to_next_multiple_of
19373 functions, and add unit tests with additional and maximal values.
19374 Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
19375 - Handle edge cases in the laplace functions: avoid division by
19376 zero, avoid taking the log of zero, and silence clang type
19377 conversion warnings using round and trunc. Add unit tests for edge
19378 cases with maximal values. Fixes part of bug 13192; bugfix
19381 o Minor bugfixes (testing):
19382 - The test for log_heartbeat was incorrectly failing in timezones
19383 with non-integer offsets. Instead of comparing the end of the time
19384 string against a constant, compare it to the output of
19385 format_local_iso_time when given the correct input. Fixes bug
19386 18039; bugfix on 0.2.5.4-alpha.
19387 - Make unit tests pass on IPv6-only systems, and systems without
19388 localhost addresses (like some FreeBSD jails). Fixes bug 17632;
19389 bugfix on 0.2.7.3-rc. Patch by "teor".
19390 - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
19392 - Check the full results of SHA256 and SHA512 digests in the unit
19393 tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
19395 o Code simplification and refactoring:
19396 - Move logging of redundant policy entries in
19397 policies_parse_exit_policy_internal into its own function. Closes
19398 ticket 17608; patch from "juce".
19399 - Extract the more complicated parts of circuit_mark_for_close()
19400 into a new function that we run periodically before circuits are
19401 freed. This change removes more than half of the functions
19402 currently in the "blob". Closes ticket 17218.
19403 - Clean up a little duplicated code in
19404 crypto_expand_key_material_TAP(). Closes ticket 17587; patch
19406 - Decouple the list of streams waiting to be attached to circuits
19407 from the overall connection list. This change makes it possible to
19408 attach streams quickly while simplifying Tor's callgraph and
19409 avoiding O(N) scans of the entire connection list. Closes
19411 - When a direct directory request fails immediately on launch,
19412 instead of relaunching that request from inside the code that
19413 launches it, instead mark the connection for teardown. This change
19414 simplifies Tor's callback and prevents the directory-request
19415 launching code from invoking itself recursively. Closes
19417 - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
19418 use them. Closes ticket 17926.
19421 - Add a description of the correct use of the '--keygen' command-
19422 line option. Closes ticket 17583; based on text by 's7r'.
19423 - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
19424 - Explain actual minima for BandwidthRate. Closes ticket 16382.
19425 - Fix a minor formatting typo in the manpage. Closes ticket 17791.
19426 - Mention torspec URL in the manpage and point the reader to it
19427 whenever we mention a document that belongs in torspce. Fixes
19430 o Removed features:
19431 - Remove client-side support for connecting to Tor relays running
19432 versions of Tor before 0.2.3.6-alpha. These relays didn't support
19433 the v3 TLS handshake protocol, and are no longer allowed on the
19434 Tor network. Implements the client side of ticket 11150. Based on
19435 patches by Tom van der Woerdt.
19438 - Add unit tests to check for common RNG failure modes, such as
19439 returning all zeroes, identical values, or incrementing values
19440 (OpenSSL's rand_predictable feature). Patch by "teor".
19441 - Log more information when the backtrace tests fail. Closes ticket
19442 17892. Patch from "cypherpunks."
19443 - Always test both ed25519 backends, so that we can be sure that our
19444 batch-open replacement code works. Part of ticket 16794.
19445 - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
19446 portion of ticket 16831.
19447 - More unit tests for compat_libevent.c, procmon.c, tortls.c,
19448 util_format.c, directory.c, and options_validate.c. Closes tickets
19449 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
19451 - Unit tests for directory_handle_command_get. Closes ticket 17004.
19452 Patch from Reinaldo de Souza Jr.
19455 Changes in version 0.2.7.6 - 2015-12-10
19456 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
19457 well as a minor bug in hidden service reliability.
19459 o Major bugfixes (guard selection):
19460 - Actually look at the Guard flag when selecting a new directory
19461 guard. When we implemented the directory guard design, we
19462 accidentally started treating all relays as if they have the Guard
19463 flag during guard selection, leading to weaker anonymity and worse
19464 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
19467 o Minor features (geoip):
19468 - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
19471 o Minor bugfixes (compilation):
19472 - When checking for net/pfvar.h, include netinet/in.h if possible.
19473 This fixes transparent proxy detection on OpenBSD. Fixes bug
19474 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
19475 - Fix a compilation warning with Clang 3.6: Do not check the
19476 presence of an address which can never be NULL. Fixes bug 17781.
19478 o Minor bugfixes (correctness):
19479 - When displaying an IPv6 exit policy, include the mask bits
19480 correctly even when the number is greater than 31. Fixes bug
19481 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
19482 - The wrong list was used when looking up expired intro points in a
19483 rend service object, causing what we think could be reachability
19484 issues for hidden services, and triggering a BUG log. Fixes bug
19485 16702; bugfix on 0.2.7.2-alpha.
19486 - Fix undefined behavior in the tor_cert_checksig function. Fixes
19487 bug 17722; bugfix on 0.2.7.2-alpha.
19490 Changes in version 0.2.7.5 - 2015-11-20
19491 The Tor 0.2.7 release series is dedicated to the memory of Tor user
19492 and privacy advocate Caspar Bowden (1961-2015). Caspar worked
19493 tirelessly to advocate human rights regardless of national borders,
19494 and oppose the encroachments of mass surveillance. He opposed national
19495 exceptionalism, he brought clarity to legal and policy debates, he
19496 understood and predicted the impact of mass surveillance on the world,
19497 and he laid the groundwork for resisting it. While serving on the Tor
19498 Project's board of directors, he brought us his uncompromising focus
19499 on technical excellence in the service of humankind. Caspar was an
19500 inimitable force for good and a wonderful friend. He was kind,
19501 humorous, generous, gallant, and believed we should protect one
19502 another without exception. We honor him here for his ideals, his
19503 efforts, and his accomplishments. Please honor his memory with works
19504 that would make him proud.
19506 Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
19508 The 0.2.7 series adds a more secure identity key type for relays,
19509 improves cryptography performance, resolves several longstanding
19510 hidden-service performance issues, improves controller support for
19511 hidden services, and includes small bugfixes and performance
19512 improvements throughout the program. This release series also includes
19513 more tests than before, and significant simplifications to which parts
19514 of Tor invoke which others.
19516 (This release contains no code changes since 0.2.7.4-rc.)
19519 Changes in version 0.2.7.4-rc - 2015-10-21
19520 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
19521 fixes some important memory leaks, and a scary-looking (but mostly
19522 harmless in practice) invalid-read bug. It also has a few small
19523 bugfixes, notably fixes for compilation and portability on different
19524 platforms. If no further significant bounds are found, the next
19525 release will the the official stable release.
19527 o Major bugfixes (security, correctness):
19528 - Fix an error that could cause us to read 4 bytes before the
19529 beginning of an openssl string. This bug could be used to cause
19530 Tor to crash on systems with unusual malloc implementations, or
19531 systems with unusual hardening installed. Fixes bug 17404; bugfix
19534 o Major bugfixes (correctness):
19535 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
19536 bug 17401; bugfix on 0.2.7.3-rc.
19538 o Major bugfixes (memory leaks):
19539 - Fix a memory leak in ed25519 batch signature checking. Fixes bug
19540 17398; bugfix on 0.2.6.1-alpha.
19541 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
19542 17402; bugfix on 0.2.7.3-rc.
19543 - Fix a memory leak when reading an expired signing key from disk.
19544 Fixes bug 17403; bugfix on 0.2.7.2-rc.
19546 o Minor features (geoIP):
19547 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
19550 o Minor bugfixes (compilation):
19551 - Repair compilation with the most recent (unreleased, alpha)
19552 vesions of OpenSSL 1.1. Fixes part of ticket 17237.
19553 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
19554 17251; bugfix on 0.2.7.2-alpha.
19555 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
19556 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
19558 o Minor bugfixes (portability):
19559 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
19560 part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
19563 o Minor bugfixes (sandbox):
19564 - Add the "hidserv-stats" filename to our sandbox filter for the
19565 HiddenServiceStatistics option to work properly. Fixes bug 17354;
19566 bugfix on 0.2.6.2-alpha. Patch from David Goulet.
19568 o Minor bugfixes (testing):
19569 - Add unit tests for get_interface_address* failure cases. Fixes bug
19570 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
19571 - Fix breakage when running 'make check' with BSD make. Fixes bug
19572 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
19573 - Make the get_ifaddrs_* unit tests more tolerant of different
19574 network configurations. (Don't assume every test box has an IPv4
19575 address, and don't assume every test box has a non-localhost
19576 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
19577 - Skip backtrace tests when backtrace support is not compiled in.
19578 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
19582 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
19583 - Note that HiddenServicePorts can take a unix domain socket. Closes
19587 Changes in version 0.2.7.3-rc - 2015-09-25
19588 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
19589 contains numerous usability fixes for Ed25519 keys, safeguards against
19590 several misconfiguration problems, significant simplifications to
19591 Tor's callgraph, and numerous bugfixes and small features.
19593 This is the most tested release of Tor to date. The unit tests cover
19594 39.40% of the code, and the integration tests (accessible with "make
19595 test-full-online", requiring stem and chutney and a network
19596 connection) raise the coverage to 64.49%.
19598 o Major features (security, hidden services):
19599 - Hidden services, if using the EntryNodes option, are required to
19600 use more than one EntryNode, in order to avoid a guard discovery
19601 attack. (This would only affect people who had configured hidden
19602 services and manually specified the EntryNodes option with a
19603 single entry-node. The impact was that it would be easy to
19604 remotely identify the guard node used by such a hidden service.
19605 See ticket for more information.) Fixes ticket 14917.
19607 o Major features (Ed25519 keys, keypinning):
19608 - The key-pinning option on directory authorities is now advisory-
19609 only by default. In a future version, or when the AuthDirPinKeys
19610 option is set, pins are enforced again. Disabling key-pinning
19611 seemed like a good idea so that we can survive the fallout of any
19612 usability problems associated with Ed25519 keys. Closes
19615 o Major features (Ed25519 performance):
19616 - Improve the speed of Ed25519 operations and Curve25519 keypair
19617 generation when built targeting 32 bit x86 platforms with SSE2
19618 available. Implements ticket 16535.
19619 - Improve the runtime speed of Ed25519 signature verification by
19620 using Ed25519-donna's batch verification support. Implements
19623 o Major features (performance testing):
19624 - The test-network.sh script now supports performance testing.
19625 Requires corresponding chutney performance testing changes. Patch
19626 by "teor". Closes ticket 14175.
19628 o Major features (relay, Ed25519):
19629 - Significant usability improvements for Ed25519 key management. Log
19630 messages are better, and the code can recover from far more
19631 failure conditions. Thanks to "s7r" for reporting and diagnosing
19633 - Add a new OfflineMasterKey option to tell Tor never to try loading
19634 or generating a secret Ed25519 identity key. You can use this in
19635 combination with tor --keygen to manage offline and/or encrypted
19636 Ed25519 keys. Implements ticket 16944.
19637 - Add a --newpass option to allow changing or removing the
19638 passphrase of an encrypted key with tor --keygen. Implements part
19640 - On receiving a HUP signal, check to see whether the Ed25519
19641 signing key has changed, and reload it if so. Closes ticket 16790.
19643 o Major bugfixes (relay, Ed25519):
19644 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
19645 0.2.7.2-alpha. Reported by "s7r".
19646 - Improve handling of expired signing keys with offline master keys.
19647 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
19649 o Minor features (client-side privacy):
19650 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
19651 lifespan when IsolateSOCKSAuth and streams with SOCKS
19652 authentication are attached to the circuit. This allows
19653 applications like TorBrowser to manage circuit lifetime on their
19654 own. Implements feature 15482.
19655 - When logging malformed hostnames from SOCKS5 requests, respect
19656 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
19658 o Minor features (compilation):
19659 - Give a warning as early as possible when trying to build with an
19660 unsupported OpenSSL version. Closes ticket 16901.
19661 - Fail during configure if we're trying to build against an OpenSSL
19662 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
19663 which started requiring ECC.
19665 o Minor features (geoip):
19666 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
19669 o Minor features (hidden services):
19670 - Relays need to have the Fast flag to get the HSDir flag. As this
19671 is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
19672 drop. This change should make some attacks against the hidden
19673 service directory system harder. Fixes ticket 15963.
19674 - Turn on hidden service statistics collection by setting the torrc
19675 option HiddenServiceStatistics to "1" by default. (This keeps
19676 track only of the fraction of traffic used by hidden services, and
19677 the total number of hidden services in existence.) Closes
19679 - Client now uses an introduction point failure cache to know when
19680 to fetch or keep a descriptor in their cache. Previously, failures
19681 were recorded implicitly, but not explicitly remembered. Closes
19684 o Minor features (testing, authorities, documentation):
19685 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
19686 explicitly manage consensus flags in testing networks. Patch by
19687 "robgjansen", modified by "teor". Implements part of ticket 14882.
19689 o Minor bugfixes (security, exit policies):
19690 - ExitPolicyRejectPrivate now also rejects the relay's published
19691 IPv6 address (if any), and any publicly routable IPv4 or IPv6
19692 addresses on any local interfaces. ticket 17027. Patch by "teor".
19693 Fixes bug 17027; bugfix on 0.2.0.11-alpha.
19695 o Minor bug fixes (torrc exit policies):
19696 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
19697 produce IPv6 wildcard addresses. Previously they would produce
19698 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
19699 of bug 16069; bugfix on 0.2.4.7-alpha.
19700 - When parsing torrc ExitPolicies, we now warn for a number of cases
19701 where the user's intent is likely to differ from Tor's actual
19702 behavior. These include: using an IPv4 address with an accept6 or
19703 reject6 line; using "private" on an accept6 or reject6 line; and
19704 including any ExitPolicy lines after accept *:* or reject *:*.
19705 Related to ticket 16069.
19706 - When parsing torrc ExitPolicies, we now issue an info-level
19707 message when expanding an "accept/reject *" line to include both
19708 IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
19709 - In each instance above, usage advice is provided to avoid the
19710 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
19711 16069; bugfix on 0.2.4.7-alpha.
19713 o Minor bugfixes (authority):
19714 - Don't assign "HSDir" to a router if it isn't Valid and Running.
19715 Fixes bug 16524; bugfix on 0.2.7.2-alpha.
19716 - Downgrade log messages about Ed25519 key issues if they are in old
19717 cached router descriptors. Fixes part of bug 16286; bugfix
19719 - When we find an Ed25519 key issue in a cached descriptor, stop
19720 saying the descriptor was just "uploaded". Fixes another part of
19721 bug 16286; bugfix on 0.2.7.2-alpha.
19723 o Minor bugfixes (control port):
19724 - Repair a warning and a spurious result when getting the maximum
19725 number of file descriptors from the controller. Fixes bug 16697;
19726 bugfix on 0.2.7.2-alpha.
19728 o Minor bugfixes (correctness):
19729 - When calling channel_free_list(), avoid calling smartlist_remove()
19730 while inside a FOREACH loop. This partially reverts commit
19731 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
19732 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
19734 o Minor bugfixes (documentation):
19735 - Advise users on how to configure separate IPv4 and IPv6 exit
19736 policies in the manpage and sample torrcs. Related to ticket 16069.
19737 - Fix the usage message of tor-resolve(1) so that it no longer lists
19738 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
19739 - Fix an error in the manual page and comments for
19740 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
19741 required "ORPort connectivity". While this is true, it is in no
19742 way unique to the HSDir flag. Of all the flags, only HSDirs need a
19743 DirPort configured in order for the authorities to assign that
19744 particular flag. Patch by "teor". Fixed as part of 14882; bugfix
19747 o Minor bugfixes (Ed25519):
19748 - Fix a memory leak when reading router descriptors with expired
19749 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
19751 o Minor bugfixes (linux seccomp2 sandbox):
19752 - Allow bridge authorities to run correctly under the seccomp2
19753 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
19754 - Allow routers with ed25519 keys to run correctly under the
19755 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
19757 o Minor bugfixes (open file limit):
19758 - Fix set_max_file_descriptors() to set by default the max open file
19759 limit to the current limit when setrlimit() fails. Fixes bug
19760 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
19762 o Minor bugfixes (portability):
19763 - Try harder to normalize the exit status of the Tor process to the
19764 standard-provided range. Fixes bug 16975; bugfix on every version
19766 - Check correctly for Windows socket errors in the workqueue
19767 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
19768 - Fix the behavior of crypto_rand_time_range() when told to consider
19769 times before 1970. (These times were possible when running in a
19770 simulated network environment where time()'s output starts at
19771 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
19772 - Restore correct operation of TLS client-cipher detection on
19773 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
19775 o Minor bugfixes (relay):
19776 - Ensure that worker threads actually exit when a fatal error or
19777 shutdown is indicated. This fix doesn't currently affect the
19778 behavior of Tor, because Tor workers never indicates fatal error
19779 or shutdown except in the unit tests. Fixes bug 16868; bugfix
19781 - Unblock threads before releasing the work queue mutex to ensure
19782 predictable scheduling behavior. Fixes bug 16644; bugfix
19785 o Code simplification and refactoring:
19786 - Change the function that's called when we need to retry all
19787 downloads so that it only reschedules the downloads to happen
19788 immediately, rather than launching them all at once itself. This
19789 further simplifies Tor's callgraph.
19790 - Move some format-parsing functions out of crypto.c and
19791 crypto_curve25519.c into crypto_format.c and/or util_format.c.
19792 - Move the client-only parts of init_keys() into a separate
19793 function. Closes ticket 16763.
19794 - Simplify the microdesc_free() implementation so that it no longer
19795 appears (to code analysis tools) to potentially invoke a huge
19796 suite of other microdesc functions.
19797 - Simply the control graph further by deferring the inner body of
19798 directory_all_unreachable() into a callback. Closes ticket 16762.
19799 - Treat the loss of an owning controller as equivalent to a SIGTERM
19800 signal. This removes a tiny amount of duplicated code, and
19801 simplifies our callgraph. Closes ticket 16788.
19802 - When generating an event to send to the controller, we no longer
19803 put the event over the network immediately. Instead, we queue
19804 these events, and use a Libevent callback to deliver them. This
19805 change simplifies Tor's callgraph by reducing the number of
19806 functions from which all other Tor functions are reachable. Closes
19808 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
19809 that try to scan or compile every file on Unix won't decide that
19811 - Remove the unused "nulterminate" argument from buf_pullup().
19814 - Recommend a 40 GB example AccountingMax in torrc.sample rather
19815 than a 4 GB max. Closes ticket 16742.
19816 - Include the TUNING document in our source tarball. It is referred
19817 to in the ChangeLog and an error message. Fixes bug 16929; bugfix
19821 - The internal pure-C tor-fw-helper tool is now removed from the Tor
19822 distribution, in favor of the pure-Go clone available from
19823 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
19824 used by the C tor-fw-helper are not, in our opinion, very
19825 confidence- inspiring in their secure-programming techniques.
19826 Closes ticket 13338.
19827 - Remove the code that would try to aggressively flush controller
19828 connections while writing to them. This code was introduced in
19829 0.1.2.7-alpha, in order to keep output buffers from exceeding
19830 their limits. But there is no longer a maximum output buffer size,
19831 and flushing data in this way caused some undesirable recursions
19832 in our call graph. Closes ticket 16480.
19835 - Make "bridges+hs" the default test network. This tests almost all
19836 tor functionality during make test-network, while allowing tests
19837 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
19838 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
19839 (chutney). Patches by "teor".
19840 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
19841 by-side in the same parent directory. Closes ticket 16903. Patch
19843 - Use environment variables rather than autoconf substitutions to
19844 send variables from the build system to the test scripts. This
19845 change should be easier to maintain, and cause 'make distcheck' to
19846 work better than before. Fixes bug 17148.
19847 - Add a new set of callgraph analysis scripts that use clang to
19848 produce a list of which Tor functions are reachable from which
19849 other Tor functions. We're planning to use these to help simplify
19850 our code structure by identifying illogical dependencies.
19851 - Add new 'test-full' and 'test-full-online' targets to run all
19852 tests, including integration tests with stem and chutney.
19853 - Make the test-workqueue test work on Windows by initializing the
19854 network before we begin.
19855 - New make target (make test-network-all) to run multiple applicable
19856 chutney test cases. Patch from Teor; closes 16953.
19857 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
19858 functions in dns.c. Implements a portion of ticket 16831.
19859 - When building Tor with testing coverage enabled, run Chutney tests
19860 (if any) using the 'tor-cov' coverage binary.
19861 - When running test-network or test-stem, check for the absence of
19862 stem/chutney before doing any build operations.
19865 Changes in version 0.2.7.2-alpha - 2015-07-27
19866 This, the second alpha in the Tor 0.2.7 series, has a number of new
19867 features, including a way to manually pick the number of introduction
19868 points for hidden services, and the much stronger Ed25519 signing key
19869 algorithm for regular Tor relays (including support for encrypted
19870 offline identity keys in the new algorithm).
19872 Support for Ed25519 on relays is currently limited to signing router
19873 descriptors; later alphas in this series will extend Ed25519 key
19874 support to more parts of the Tor protocol.
19876 o Major features (Ed25519 identity keys, Proposal 220):
19877 - All relays now maintain a stronger identity key, using the Ed25519
19878 elliptic curve signature format. This master key is designed so
19879 that it can be kept offline. Relays also generate an online
19880 signing key, and a set of other Ed25519 keys and certificates.
19881 These are all automatically regenerated and rotated as needed.
19882 Implements part of ticket 12498.
19883 - Directory authorities now vote on Ed25519 identity keys along with
19884 RSA1024 keys. Implements part of ticket 12498.
19885 - Directory authorities track which Ed25519 identity keys have been
19886 used with which RSA1024 identity keys, and do not allow them to
19887 vary freely. Implements part of ticket 12498.
19888 - Microdescriptors now include Ed25519 identity keys. Implements
19889 part of ticket 12498.
19890 - Add support for offline encrypted Ed25519 master keys. To use this
19891 feature on your tor relay, run "tor --keygen" to make a new master
19892 key (or to make a new signing key if you already have a master
19893 key). Closes ticket 13642.
19895 o Major features (Hidden services):
19896 - Add the torrc option HiddenServiceNumIntroductionPoints, to
19897 specify a fixed number of introduction points. Its maximum value
19898 is 10 and default is 3. Using this option can increase a hidden
19899 service's reliability under load, at the cost of making it more
19900 visible that the hidden service is facing extra load. Closes
19902 - Remove the adaptive algorithm for choosing the number of
19903 introduction points, which used to change the number of
19904 introduction points (poorly) depending on the number of
19905 connections the HS sees. Closes ticket 4862.
19907 o Major features (onion key cross-certification):
19908 - Relay descriptors now include signatures of their own identity
19909 keys, made using the TAP and ntor onion keys. These signatures
19910 allow relays to prove ownership of their own onion keys. Because
19911 of this change, microdescriptors will no longer need to include
19912 RSA identity keys. Implements proposal 228; closes ticket 12499.
19914 o Major features (performance):
19915 - Improve the runtime speed of Ed25519 operations by using the
19916 public-domain Ed25519-donna by Andrew M. ("floodyberry").
19917 Implements ticket 16467.
19918 - Improve the runtime speed of the ntor handshake by using an
19919 optimized curve25519 basepoint scalarmult implementation from the
19920 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
19921 ideas by Adam Langley. Implements ticket 9663.
19923 o Major bugfixes (client-side privacy, also in 0.2.6.9):
19924 - Properly separate out each SOCKSPort when applying stream
19925 isolation. The error occurred because each port's session group
19926 was being overwritten by a default value when the listener
19927 connection was initialized. Fixes bug 16247; bugfix on
19928 0.2.6.3-alpha. Patch by "jojelino".
19930 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
19931 - Stop refusing to store updated hidden service descriptors on a
19932 client. This reverts commit 9407040c59218 (which indeed fixed bug
19933 14219, but introduced a major hidden service reachability
19934 regression detailed in bug 16381). This is a temporary fix since
19935 we can live with the minor issue in bug 14219 (it just results in
19936 some load on the network) but the regression of 16381 is too much
19937 of a setback. First-round fix for bug 16381; bugfix
19940 o Major bugfixes (hidden services):
19941 - When cannibalizing a circuit for an introduction point, always
19942 extend to the chosen exit node (creating a 4 hop circuit).
19943 Previously Tor would use the current circuit exit node, which
19944 changed the original choice of introduction point, and could cause
19945 the hidden service to skip excluded introduction points or
19946 reconnect to a skipped introduction point. Fixes bug 16260; bugfix
19949 o Major bugfixes (open file limit):
19950 - The open file limit wasn't checked before calling
19951 tor_accept_socket_nonblocking(), which would make Tor exceed the
19952 limit. Now, before opening a new socket, Tor validates the open
19953 file limit just before, and if the max has been reached, return an
19954 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
19956 o Major bugfixes (stability, also in 0.2.6.10):
19957 - Stop crashing with an assertion failure when parsing certain kinds
19958 of malformed or truncated microdescriptors. Fixes bug 16400;
19959 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
19960 by "cypherpunks_backup".
19961 - Stop random client-side assertion failures that could occur when
19962 connecting to a busy hidden service, or connecting to a hidden
19963 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
19966 o Minor features (directory authorities, security, also in 0.2.6.9):
19967 - The HSDir flag given by authorities now requires the Stable flag.
19968 For the current network, this results in going from 2887 to 2806
19969 HSDirs. Also, it makes it harder for an attacker to launch a sybil
19970 attack by raising the effort for a relay to become Stable to
19971 require at the very least 7 days, while maintaining the 96 hours
19972 uptime requirement for HSDir. Implements ticket 8243.
19974 o Minor features (client):
19975 - Relax the validation of hostnames in SOCKS5 requests, allowing the
19976 character '_' to appear, in order to cope with domains observed in
19977 the wild that are serving non-RFC compliant records. Resolves
19979 - Relax the validation done to hostnames in SOCKS5 requests, and
19980 allow a single trailing '.' to cope with clients that pass FQDNs
19981 using that syntax to explicitly indicate that the domain name is
19982 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
19983 - Add GroupWritable and WorldWritable options to unix-socket based
19984 SocksPort and ControlPort options. These options apply to a single
19985 socket, and override {Control,Socks}SocketsGroupWritable. Closes
19988 o Minor features (control protocol):
19989 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
19990 the control protocol. Resolves ticket 15358.
19992 o Minor features (directory authorities):
19993 - Directory authorities no longer vote against the "Fast", "Stable",
19994 and "HSDir" flags just because they were going to vote against
19995 "Running": if the consensus turns out to be that the router was
19996 running, then the authority's vote should count. Patch from Peter
19997 Retzlaff; closes issue 8712.
19999 o Minor features (geoip, also in 0.2.6.10):
20000 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
20001 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
20003 o Minor features (hidden services):
20004 - Add the new options "HiddenServiceMaxStreams" and
20005 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
20006 limit the maximum number of simultaneous streams per circuit, and
20007 optionally tear down the circuit when the limit is exceeded. Part
20010 o Minor features (portability):
20011 - Use C99 variadic macros when the compiler is not GCC. This avoids
20012 failing compilations on MSVC, and fixes a log-file-based race
20013 condition in our old workarounds. Original patch from Gisle Vanem.
20015 o Minor bugfixes (compilation, also in 0.2.6.9):
20016 - Build with --enable-systemd correctly when libsystemd is
20017 installed, but systemd is not. Fixes bug 16164; bugfix on
20018 0.2.6.3-alpha. Patch from Peter Palfrader.
20020 o Minor bugfixes (controller):
20021 - Add the descriptor ID in each HS_DESC control event. It was
20022 missing, but specified in control-spec.txt. Fixes bug 15881;
20023 bugfix on 0.2.5.2-alpha.
20025 o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
20026 - Check for failures from crypto_early_init, and refuse to continue.
20027 A previous typo meant that we could keep going with an
20028 uninitialized crypto library, and would have OpenSSL initialize
20029 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
20030 when implementing ticket 4900. Patch by "teor".
20032 o Minor bugfixes (hidden services):
20033 - Fix a crash when reloading configuration while at least one
20034 configured and one ephemeral hidden service exists. Fixes bug
20035 16060; bugfix on 0.2.7.1-alpha.
20036 - Avoid crashing with a double-free bug when we create an ephemeral
20037 hidden service but adding it fails for some reason. Fixes bug
20038 16228; bugfix on 0.2.7.1-alpha.
20040 o Minor bugfixes (Linux seccomp2 sandbox):
20041 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
20042 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
20044 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
20045 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
20046 these when eventfd2() support is missing. Fixes bug 16363; bugfix
20047 on 0.2.6.3-alpha. Patch from "teor".
20049 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
20050 - Fix sandboxing to work when running as a relay, by allowing the
20051 renaming of secret_id_key, and allowing the eventfd2 and futex
20052 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
20054 - Allow systemd connections to work with the Linux seccomp2 sandbox
20055 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
20058 o Minor bugfixes (relay):
20059 - Fix a rarely-encountered memory leak when failing to initialize
20060 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
20061 from "cypherpunks".
20063 o Minor bugfixes (systemd):
20064 - Fix an accidental formatting error that broke the systemd
20065 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
20066 - Tor's systemd unit file no longer contains extraneous spaces.
20067 These spaces would sometimes confuse tools like deb-systemd-
20068 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
20070 o Minor bugfixes (tests):
20071 - Use the configured Python executable when running test-stem-full.
20072 Fixes bug 16470; bugfix on 0.2.7.1-alpha.
20074 o Minor bugfixes (tests, also in 0.2.6.9):
20075 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
20076 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
20078 o Minor bugfixes (threads, comments):
20079 - Always initialize return value in compute_desc_id in rendcommon.c
20080 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20081 - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
20082 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20083 - Remove undefined directive-in-macro in test_util_writepid clang
20084 3.7 complains that using a preprocessor directive inside a macro
20085 invocation in test_util_writepid in test_util.c is undefined.
20086 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20088 o Code simplification and refactoring:
20089 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
20090 to ensure they remain consistent and visible everywhere.
20091 - Remove some vestigial workarounds for the MSVC6 compiler. We
20092 haven't supported that in ages.
20093 - The link authentication code has been refactored for better
20094 testability and reliability. It now uses code generated with the
20095 "trunnel" binary encoding generator, to reduce the risk of bugs
20096 due to programmer error. Done as part of ticket 12498.
20099 - Include a specific and (hopefully) accurate documentation of the
20100 torrc file's meta-format in doc/torrc_format.txt. This is mainly
20101 of interest to people writing programs to parse or generate torrc
20102 files. This document is not a commitment to long-term
20103 compatibility; some aspects of the current format are a bit
20104 ridiculous. Closes ticket 2325.
20106 o Removed features:
20107 - Tor no longer supports copies of OpenSSL that are missing support
20108 for Elliptic Curve Cryptography. (We began using ECC when
20109 available in 0.2.4.8-alpha, for more safe and efficient key
20110 negotiation.) In particular, support for at least one of P256 or
20111 P224 is now required, with manual configuration needed if only
20112 P224 is available. Resolves ticket 16140.
20113 - Tor no longer supports versions of OpenSSL before 1.0. (If you are
20114 on an operating system that has not upgraded to OpenSSL 1.0 or
20115 later, and you compile Tor from source, you will need to install a
20116 more recent OpenSSL to link Tor against.) These versions of
20117 OpenSSL are still supported by the OpenSSL, but the numerous
20118 cryptographic improvements in later OpenSSL releases makes them a
20119 clear choice. Resolves ticket 16034.
20120 - Remove the HidServDirectoryV2 option. Now all relays offer to
20121 store hidden service descriptors. Related to 16543.
20122 - Remove the VoteOnHidServDirectoriesV2 option, since all
20123 authorities have long set it to 1. Closes ticket 16543.
20126 - Document use of coverity, clang static analyzer, and clang dynamic
20127 undefined behavior and address sanitizers in doc/HACKING. Include
20128 detailed usage instructions in the blacklist. Patch by "teor".
20129 Closes ticket 15817.
20130 - The link authentication protocol code now has extensive tests.
20131 - The relay descriptor signature testing code now has
20133 - The test_workqueue program now runs faster, and is enabled by
20134 default as a part of "make check".
20135 - Now that OpenSSL has its own scrypt implementation, add an unit
20136 test that checks for interoperability between libscrypt_scrypt()
20137 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
20138 and rely on EVP_PBE_scrypt() whenever possible. Resolves
20142 Changes in version 0.2.6.10 - 2015-07-12
20143 Tor version 0.2.6.10 fixes some significant stability and hidden
20144 service client bugs, bulletproofs the cryptography init process, and
20145 fixes a bug when using the sandbox code with some older versions of
20146 Linux. Everyone running an older version, especially an older version
20147 of 0.2.6, should upgrade.
20149 o Major bugfixes (hidden service clients, stability):
20150 - Stop refusing to store updated hidden service descriptors on a
20151 client. This reverts commit 9407040c59218 (which indeed fixed bug
20152 14219, but introduced a major hidden service reachability
20153 regression detailed in bug 16381). This is a temporary fix since
20154 we can live with the minor issue in bug 14219 (it just results in
20155 some load on the network) but the regression of 16381 is too much
20156 of a setback. First-round fix for bug 16381; bugfix
20159 o Major bugfixes (stability):
20160 - Stop crashing with an assertion failure when parsing certain kinds
20161 of malformed or truncated microdescriptors. Fixes bug 16400;
20162 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
20163 by "cypherpunks_backup".
20164 - Stop random client-side assertion failures that could occur when
20165 connecting to a busy hidden service, or connecting to a hidden
20166 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
20169 o Minor features (geoip):
20170 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
20171 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
20173 o Minor bugfixes (crypto error-handling):
20174 - Check for failures from crypto_early_init, and refuse to continue.
20175 A previous typo meant that we could keep going with an
20176 uninitialized crypto library, and would have OpenSSL initialize
20177 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
20178 when implementing ticket 4900. Patch by "teor".
20180 o Minor bugfixes (Linux seccomp2 sandbox):
20181 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
20182 these when eventfd2() support is missing. Fixes bug 16363; bugfix
20183 on 0.2.6.3-alpha. Patch from "teor".
20186 Changes in version 0.2.6.9 - 2015-06-11
20187 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
20188 requirements for receiving an HSDir flag, and addresses some other small
20189 bugs in the systemd and sandbox code. Clients using circuit isolation
20190 should upgrade; all directory authorities should upgrade.
20192 o Major bugfixes (client-side privacy):
20193 - Properly separate out each SOCKSPort when applying stream
20194 isolation. The error occurred because each port's session group was
20195 being overwritten by a default value when the listener connection
20196 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
20199 o Minor feature (directory authorities, security):
20200 - The HSDir flag given by authorities now requires the Stable flag.
20201 For the current network, this results in going from 2887 to 2806
20202 HSDirs. Also, it makes it harder for an attacker to launch a sybil
20203 attack by raising the effort for a relay to become Stable which
20204 takes at the very least 7 days to do so and by keeping the 96
20205 hours uptime requirement for HSDir. Implements ticket 8243.
20207 o Minor bugfixes (compilation):
20208 - Build with --enable-systemd correctly when libsystemd is
20209 installed, but systemd is not. Fixes bug 16164; bugfix on
20210 0.2.6.3-alpha. Patch from Peter Palfrader.
20212 o Minor bugfixes (Linux seccomp2 sandbox):
20213 - Fix sandboxing to work when running as a relaymby renaming of
20214 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
20215 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
20216 - Allow systemd connections to work with the Linux seccomp2 sandbox
20217 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
20220 o Minor bugfixes (tests):
20221 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
20222 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
20225 Changes in version 0.2.6.8 - 2015-05-21
20226 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
20227 fixes an authority-side bug in assigning the HSDir flag. All directory
20228 authorities should upgrade.
20230 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
20231 - Revert commit that made directory authorities assign the HSDir
20232 flag to relays without a DirPort; this was bad because such relays
20233 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
20236 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
20237 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
20238 a client authorized hidden service. Fixes bug 15823; bugfix
20241 o Minor features (geoip):
20242 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
20243 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
20247 Changes in version 0.2.7.1-alpha - 2015-05-12
20248 Tor 0.2.7.1-alpha is the first alpha release in its series. It
20249 includes numerous small features and bugfixes against previous Tor
20250 versions, and numerous small infrastructure improvements. The most
20251 notable features are several new ways for controllers to interact with
20252 the hidden services subsystem.
20254 o New system requirements:
20255 - Tor no longer includes workarounds to support Libevent versions
20256 before 1.3e. Libevent 2.0 or later is recommended. Closes
20259 o Major features (controller):
20260 - Add the ADD_ONION and DEL_ONION commands that allow the creation
20261 and management of hidden services via the controller. Closes
20263 - New "GETINFO onions/current" and "GETINFO onions/detached"
20264 commands to get information about hidden services created via the
20265 controller. Part of ticket 6411.
20266 - New HSFETCH command to launch a request for a hidden service
20267 descriptor. Closes ticket 14847.
20268 - New HSPOST command to upload a hidden service descriptor. Closes
20269 ticket 3523. Patch by "DonnchaC".
20271 o Major bugfixes (hidden services):
20272 - Revert commit that made directory authorities assign the HSDir
20273 flag to relays without a DirPort; this was bad because such relays
20274 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
20277 o Minor features (clock-jump tolerance):
20278 - Recover better when our clock jumps back many hours, like might
20279 happen for Tails or Whonix users who start with a very wrong
20280 hardware clock, use Tor to discover a more accurate time, and then
20281 fix their clock. Resolves part of ticket 8766.
20283 o Minor features (command-line interface):
20284 - Make --hash-password imply --hush to prevent unnecessary noise.
20285 Closes ticket 15542. Patch from "cypherpunks".
20286 - Print a warning whenever we find a relative file path being used
20287 as torrc option. Resolves issue 14018.
20289 o Minor features (controller):
20290 - Add DirAuthority lines for default directory authorities to the
20291 output of the "GETINFO config/defaults" command if not already
20292 present. Implements ticket 14840.
20293 - Controllers can now use "GETINFO hs/client/desc/id/..." to
20294 retrieve items from the client's hidden service descriptor cache.
20295 Closes ticket 14845.
20296 - Implement a new controller command "GETINFO status/fresh-relay-
20297 descs" to fetch a descriptor/extrainfo pair that was generated on
20298 demand just for the controller's use. Implements ticket 14784.
20300 o Minor features (DoS-resistance):
20301 - Make it harder for attackers to overload hidden services with
20302 introductions, by blocking multiple introduction requests on the
20303 same circuit. Resolves ticket 15515.
20305 o Minor features (geoip):
20306 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
20307 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
20310 o Minor features (HS popularity countermeasure):
20311 - To avoid leaking HS popularity, don't cycle the introduction point
20312 when we've handled a fixed number of INTRODUCE2 cells but instead
20313 cycle it when a random number of introductions is reached, thus
20314 making it more difficult for an attacker to find out the amount of
20315 clients that have used the introduction point for a specific HS.
20316 Closes ticket 15745.
20318 o Minor features (logging):
20319 - Include the Tor version in all LD_BUG log messages, since people
20320 tend to cut and paste those into the bugtracker. Implements
20323 o Minor features (pluggable transports):
20324 - When launching managed pluggable transports on Linux systems,
20325 attempt to have the kernel deliver a SIGTERM on tor exit if the
20326 pluggable transport process is still running. Resolves
20328 - When launching managed pluggable transports, setup a valid open
20329 stdin in the child process that can be used to detect if tor has
20330 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
20331 can be used by implementations to detect this new behavior.
20332 Resolves ticket 15435.
20334 o Minor features (testing):
20335 - Add a test to verify that the compiler does not eliminate our
20336 memwipe() implementation. Closes ticket 15377.
20337 - Add make rule `check-changes` to verify the format of changes
20338 files. Closes ticket 15180.
20339 - Add unit tests for control_event_is_interesting(). Add a compile-
20340 time check that the number of events doesn't exceed the capacity
20341 of control_event_t.event_mask. Closes ticket 15431, checks for
20342 bugs similar to 13085. Patch by "teor".
20343 - Command-line argument tests moved to Stem. Resolves ticket 14806.
20344 - Integrate the ntor, backtrace, and zero-length keys tests into the
20345 automake test suite. Closes ticket 15344.
20346 - Remove assertions during builds to determine Tor's test coverage.
20347 We don't want to trigger these even in assertions, so including
20348 them artificially makes our branch coverage look worse than it is.
20349 This patch provides the new test-stem-full and coverage-html-full
20350 configure options. Implements ticket 15400.
20352 o Minor bugfixes (build):
20353 - Improve out-of-tree builds by making non-standard rules work and
20354 clean up additional files and directories. Fixes bug 15053; bugfix
20357 o Minor bugfixes (command-line interface):
20358 - When "--quiet" is provided along with "--validate-config", do not
20359 write anything to stdout on success. Fixes bug 14994; bugfix
20361 - When complaining about bad arguments to "--dump-config", use
20362 stderr, not stdout.
20364 o Minor bugfixes (configuration, unit tests):
20365 - Only add the default fallback directories when the DirAuthorities,
20366 AlternateDirAuthority, and FallbackDir directory config options
20367 are set to their defaults. The default fallback directory list is
20368 currently empty, this fix will only change tor's behavior when it
20369 has default fallback directories. Includes unit tests for
20370 consider_adding_dir_servers(). Fixes bug 15642; bugfix on
20371 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
20373 o Minor bugfixes (correctness):
20374 - For correctness, avoid modifying a constant string in
20375 handle_control_postdescriptor. Fixes bug 15546; bugfix
20377 - Remove side-effects from tor_assert() calls. This was harmless,
20378 because we never disable assertions, but it is bad style and
20379 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
20382 o Minor bugfixes (hidden service):
20383 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
20384 a client authorized hidden service. Fixes bug 15823; bugfix
20386 - Remove an extraneous newline character from the end of hidden
20387 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
20389 o Minor bugfixes (interface):
20390 - Print usage information for --dump-config when it is used without
20391 an argument. Also, fix the error message to use different wording
20392 and add newline at the end. Fixes bug 15541; bugfix
20395 o Minor bugfixes (logs):
20396 - When building Tor under Clang, do not include an extra set of
20397 parentheses in log messages that include function names. Fixes bug
20398 15269; bugfix on every released version of Tor when compiled with
20399 recent enough Clang.
20401 o Minor bugfixes (network):
20402 - When attempting to use fallback technique for network interface
20403 lookup, disregard loopback and multicast addresses since they are
20404 unsuitable for public communications.
20406 o Minor bugfixes (statistics):
20407 - Disregard the ConnDirectionStatistics torrc options when Tor is
20408 not a relay since in that mode of operation no sensible data is
20409 being collected and because Tor might run into measurement hiccups
20410 when running as a client for some time, then becoming a relay.
20411 Fixes bug 15604; bugfix on 0.2.2.35.
20413 o Minor bugfixes (test networks):
20414 - When self-testing reachability, use ExtendAllowPrivateAddresses to
20415 determine if local/private addresses imply reachability. The
20416 previous fix used TestingTorNetwork, which implies
20417 ExtendAllowPrivateAddresses, but this excluded rare configurations
20418 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
20419 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
20420 issue discovered by CJ Ess.
20422 o Minor bugfixes (testing):
20423 - Check for matching value in server response in ntor_ref.py. Fixes
20424 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
20426 - Set the severity correctly when testing
20427 get_interface_addresses_ifaddrs() and
20428 get_interface_addresses_win32(), so that the tests fail gracefully
20429 instead of triggering an assertion. Fixes bug 15759; bugfix on
20430 0.2.6.3-alpha. Reported by Nicolas Derive.
20432 o Code simplification and refactoring:
20433 - Move the hacky fallback code out of get_interface_address6() into
20434 separate function and get it covered with unit-tests. Resolves
20436 - Refactor hidden service client-side cache lookup to intelligently
20437 report its various failure cases, and disentangle failure cases
20438 involving a lack of introduction points. Closes ticket 14391.
20439 - Use our own Base64 encoder instead of OpenSSL's, to allow more
20440 control over the output. Part of ticket 15652.
20443 - Improve the descriptions of statistics-related torrc options in
20444 the manpage to describe rationale and possible uses cases. Fixes
20446 - Improve the layout and formatting of ./configure --help messages.
20447 Closes ticket 15024. Patch from "cypherpunks".
20448 - Standardize on the term "server descriptor" in the manual page.
20449 Previously, we had used "router descriptor", "server descriptor",
20450 and "relay descriptor" interchangeably. Part of ticket 14987.
20453 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
20454 and always use the internal Base64 decoder. The internal decoder
20455 has been part of tor since 0.2.0.10-alpha, and no one should
20456 be using the OpenSSL one. Part of ticket 15652.
20457 - Remove the 'tor_strclear()' function; use memwipe() instead.
20458 Closes ticket 14922.
20460 o Removed features:
20461 - Remove the (seldom-used) DynamicDHGroups feature. For anti-
20462 fingerprinting we now recommend pluggable transports; for forward-
20463 secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
20464 - Remove the undocumented "--digests" command-line option. It
20465 complicated our build process, caused subtle build issues on
20466 multiple platforms, and is now redundant since we started
20467 including git version identifiers. Closes ticket 14742.
20468 - Tor no longer contains checks for ancient directory cache versions
20469 that didn't know about microdescriptors.
20470 - Tor no longer contains workarounds for stat files generated by
20471 super-old versions of Tor that didn't choose guards sensibly.
20474 Changes in version 0.2.4.27 - 2015-04-06
20475 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
20476 could be used by an attacker to crash hidden services, or crash clients
20477 visiting hidden services. Hidden services should upgrade as soon as
20478 possible; clients should upgrade whenever packages become available.
20480 This release also backports a simple improvement to make hidden
20481 services a bit less vulnerable to denial-of-service attacks.
20483 o Major bugfixes (security, hidden service):
20484 - Fix an issue that would allow a malicious client to trigger an
20485 assertion failure and halt a hidden service. Fixes bug 15600;
20486 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20487 - Fix a bug that could cause a client to crash with an assertion
20488 failure when parsing a malformed hidden service descriptor. Fixes
20489 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20491 o Minor features (DoS-resistance, hidden service):
20492 - Introduction points no longer allow multiple INTRODUCE1 cells to
20493 arrive on the same circuit. This should make it more expensive for
20494 attackers to overwhelm hidden services with introductions.
20495 Resolves ticket 15515.
20498 Changes in version 0.2.5.12 - 2015-04-06
20499 Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
20500 could be used by an attacker to crash hidden services, or crash clients
20501 visiting hidden services. Hidden services should upgrade as soon as
20502 possible; clients should upgrade whenever packages become available.
20504 This release also backports a simple improvement to make hidden
20505 services a bit less vulnerable to denial-of-service attacks.
20507 o Major bugfixes (security, hidden service):
20508 - Fix an issue that would allow a malicious client to trigger an
20509 assertion failure and halt a hidden service. Fixes bug 15600;
20510 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20511 - Fix a bug that could cause a client to crash with an assertion
20512 failure when parsing a malformed hidden service descriptor. Fixes
20513 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20515 o Minor features (DoS-resistance, hidden service):
20516 - Introduction points no longer allow multiple INTRODUCE1 cells to
20517 arrive on the same circuit. This should make it more expensive for
20518 attackers to overwhelm hidden services with introductions.
20519 Resolves ticket 15515.
20522 Changes in version 0.2.6.7 - 2015-04-06
20523 Tor 0.2.6.7 fixes two security issues that could be used by an
20524 attacker to crash hidden services, or crash clients visiting hidden
20525 services. Hidden services should upgrade as soon as possible; clients
20526 should upgrade whenever packages become available.
20528 This release also contains two simple improvements to make hidden
20529 services a bit less vulnerable to denial-of-service attacks.
20531 o Major bugfixes (security, hidden service):
20532 - Fix an issue that would allow a malicious client to trigger an
20533 assertion failure and halt a hidden service. Fixes bug 15600;
20534 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20535 - Fix a bug that could cause a client to crash with an assertion
20536 failure when parsing a malformed hidden service descriptor. Fixes
20537 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20539 o Minor features (DoS-resistance, hidden service):
20540 - Introduction points no longer allow multiple INTRODUCE1 cells to
20541 arrive on the same circuit. This should make it more expensive for
20542 attackers to overwhelm hidden services with introductions.
20543 Resolves ticket 15515.
20544 - Decrease the amount of reattempts that a hidden service performs
20545 when its rendezvous circuits fail. This reduces the computational
20546 cost for running a hidden service under heavy load. Resolves
20550 Changes in version 0.2.6.6 - 2015-03-24
20551 Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
20553 It adds numerous safety, security, correctness, and performance
20554 improvements. Client programs can be configured to use more kinds of
20555 sockets, AutomapHosts works better, the multithreading backend is
20556 improved, cell transmission is refactored, test coverage is much
20557 higher, more denial-of-service attacks are handled, guard selection is
20558 improved to handle long-term guards better, pluggable transports
20559 should work a bit better, and some annoying hidden service performance
20560 bugs should be addressed.
20562 o Minor bugfixes (portability):
20563 - Use the correct datatype in the SipHash-2-4 function to prevent
20564 compilers from assuming any sort of alignment. Fixes bug 15436;
20565 bugfix on 0.2.5.3-alpha.
20567 Changes in version 0.2.6.5-rc - 2015-03-18
20568 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
20569 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
20571 o Major bugfixes (client):
20572 - Avoid crashing when making certain configuration option changes on
20573 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
20576 o Major bugfixes (pluggable transports):
20577 - Initialize the extended OR Port authentication cookie before
20578 launching pluggable transports. This prevents a race condition
20579 that occurred when server-side pluggable transports would cache the
20580 authentication cookie before it has been (re)generated. Fixes bug
20581 15240; bugfix on 0.2.5.1-alpha.
20583 o Major bugfixes (portability):
20584 - Do not crash on startup when running on Solaris. Fixes a bug
20585 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
20588 o Minor features (heartbeat):
20589 - On relays, report how many connections we negotiated using each
20590 version of the Tor link protocols. This information will let us
20591 know if removing support for very old versions of the Tor
20592 protocols is harming the network. Closes ticket 15212.
20594 o Code simplification and refactoring:
20595 - Refactor main loop to extract the 'loop' part. This makes it
20596 easier to run Tor under Shadow. Closes ticket 15176.
20599 Changes in version 0.2.5.11 - 2015-03-17
20600 Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
20602 It backports several bugfixes from the 0.2.6 branch, including a
20603 couple of medium-level security fixes for relays and exit nodes.
20604 It also updates the list of directory authorities.
20606 o Directory authority changes:
20607 - Remove turtles as a directory authority.
20608 - Add longclaw as a new (v3) directory authority. This implements
20609 ticket 13296. This keeps the directory authority count at 9.
20610 - The directory authority Faravahar has a new IP address. This
20611 closes ticket 14487.
20613 o Major bugfixes (crash, OSX, security):
20614 - Fix a remote denial-of-service opportunity caused by a bug in
20615 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
20618 o Major bugfixes (relay, stability, possible security):
20619 - Fix a bug that could lead to a relay crashing with an assertion
20620 failure if a buffer of exactly the wrong layout was passed to
20621 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20622 0.2.0.10-alpha. Patch from 'cypherpunks'.
20623 - Do not assert if the 'data' pointer on a buffer is advanced to the
20624 very end of the buffer; log a BUG message instead. Only assert if
20625 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20627 o Major bugfixes (exit node stability):
20628 - Fix an assertion failure that could occur under high DNS load.
20629 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20630 diagnosed and fixed by "cypherpunks".
20632 o Major bugfixes (Linux seccomp2 sandbox):
20633 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
20634 crash during attempts to call wait4. Fixes bug 15088; bugfix on
20635 0.2.5.1-alpha. Patch from "sanic".
20637 o Minor features (controller):
20638 - New "GETINFO bw-event-cache" to get information about recent
20639 bandwidth events. Closes ticket 14128. Useful for controllers to
20640 get recent bandwidth history after the fix for ticket 13988.
20642 o Minor features (geoip):
20643 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20644 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20647 o Minor bugfixes (client, automapping):
20648 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
20649 no value follows the option. Fixes bug 14142; bugfix on
20650 0.2.4.7-alpha. Patch by "teor".
20651 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
20652 14195; bugfix on 0.1.0.1-rc.
20654 o Minor bugfixes (compilation):
20655 - Build without warnings with the stock OpenSSL srtp.h header, which
20656 has a duplicate declaration of SSL_get_selected_srtp_profile().
20657 Fixes bug 14220; this is OpenSSL's bug, not ours.
20659 o Minor bugfixes (directory authority):
20660 - Allow directory authorities to fetch more data from one another if
20661 they find themselves missing lots of votes. Previously, they had
20662 been bumping against the 10 MB queued data limit. Fixes bug 14261;
20663 bugfix on 0.1.2.5-alpha.
20664 - Enlarge the buffer to read bwauth generated files to avoid an
20665 issue when parsing the file in dirserv_read_measured_bandwidths().
20666 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
20668 o Minor bugfixes (statistics):
20669 - Increase period over which bandwidth observations are aggregated
20670 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
20672 o Minor bugfixes (preventative security, C safety):
20673 - When reading a hexadecimal, base-32, or base-64 encoded value from
20674 a string, always overwrite the whole output buffer. This prevents
20675 some bugs where we would look at (but fortunately, not reveal)
20676 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
20680 Changes in version 0.2.4.26 - 2015-03-17
20681 Tor 0.2.4.26 includes an updated list of directory authorities. It
20682 also backports a couple of stability and security bugfixes from 0.2.5
20685 o Directory authority changes:
20686 - Remove turtles as a directory authority.
20687 - Add longclaw as a new (v3) directory authority. This implements
20688 ticket 13296. This keeps the directory authority count at 9.
20689 - The directory authority Faravahar has a new IP address. This
20690 closes ticket 14487.
20692 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
20693 - Fix an assertion failure that could occur under high DNS load.
20694 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20695 diagnosed and fixed by "cypherpunks".
20697 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
20698 - Fix a bug that could lead to a relay crashing with an assertion
20699 failure if a buffer of exactly the wrong layout was passed to
20700 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20701 0.2.0.10-alpha. Patch from 'cypherpunks'.
20702 - Do not assert if the 'data' pointer on a buffer is advanced to the
20703 very end of the buffer; log a BUG message instead. Only assert if
20704 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20706 o Minor features (geoip):
20707 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20708 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20711 Changes in version 0.2.6.4-rc - 2015-03-09
20712 Tor 0.2.6.4-alpha fixes an issue in the directory code that an
20713 attacker might be able to use in order to crash certain Tor
20714 directories. It also resolves some minor issues left over from, or
20715 introduced in, Tor 0.2.6.3-alpha or earlier.
20717 o Major bugfixes (crash, OSX, security):
20718 - Fix a remote denial-of-service opportunity caused by a bug in
20719 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
20722 o Major bugfixes (relay, stability, possible security):
20723 - Fix a bug that could lead to a relay crashing with an assertion
20724 failure if a buffer of exactly the wrong layout is passed to
20725 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20726 0.2.0.10-alpha. Patch from "cypherpunks".
20727 - Do not assert if the 'data' pointer on a buffer is advanced to the
20728 very end of the buffer; log a BUG message instead. Only assert if
20729 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20731 o Major bugfixes (FreeBSD IPFW transparent proxy):
20732 - Fix address detection with FreeBSD transparent proxies, when
20733 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
20736 o Major bugfixes (Linux seccomp2 sandbox):
20737 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
20738 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
20740 - Allow AF_UNIX hidden services to be used with the seccomp2
20741 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
20742 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
20743 crash during attempts to call wait4. Fixes bug 15088; bugfix on
20744 0.2.5.1-alpha. Patch from "sanic".
20746 o Minor features (controller):
20747 - Messages about problems in the bootstrap process now include
20748 information about the server we were trying to connect to when we
20749 noticed the problem. Closes ticket 15006.
20751 o Minor features (geoip):
20752 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20753 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20756 o Minor features (logs):
20757 - Quiet some log messages in the heartbeat and at startup. Closes
20760 o Minor bugfixes (certificate handling):
20761 - If an authority operator accidentally makes a signing certificate
20762 with a future publication time, do not discard its real signing
20763 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
20764 - Remove any old authority certificates that have been superseded
20765 for at least two days. Previously, we would keep superseded
20766 certificates until they expired, if they were published close in
20767 time to the certificate that superseded them. Fixes bug 11454;
20768 bugfix on 0.2.1.8-alpha.
20770 o Minor bugfixes (compilation):
20771 - Fix a compilation warning on s390. Fixes bug 14988; bugfix
20773 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
20776 o Minor bugfixes (testing):
20777 - Fix endianness issues in unit test for resolve_my_address() to
20778 have it pass on big endian systems. Fixes bug 14980; bugfix on
20780 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
20781 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
20782 - When running the new 'make test-stem' target, use the configured
20783 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
20784 from "cypherpunks".
20785 - When running the zero-length-keys tests, do not use the default
20786 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
20789 o Directory authority IP change:
20790 - The directory authority Faravahar has a new IP address. This
20791 closes ticket 14487.
20794 - Remove some lingering dead code that once supported mempools.
20795 Mempools were disabled by default in 0.2.5, and removed entirely
20796 in 0.2.6.3-alpha. Closes more of ticket 14848; patch
20800 Changes in version 0.2.6.3-alpha - 2015-02-19
20801 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
20802 the 0.2.6.x series. It introduces support for more kinds of sockets,
20803 makes it harder to accidentally run an exit, improves our
20804 multithreading backend, incorporates several fixes for the
20805 AutomapHostsOnResolve option, and fixes numerous other bugs besides.
20807 If no major regressions or security holes are found in this version,
20808 the next version will be a release candidate.
20810 o Deprecated versions:
20811 - Tor relays older than 0.2.4.18-rc are no longer allowed to
20812 advertise themselves on the network. Closes ticket 13555.
20814 o Major features (security, unix domain sockets):
20815 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
20816 applications can reach Tor without having to create AF_INET or
20817 AF_INET6 sockets, meaning they can completely disable their
20818 ability to make non-Tor network connections. To create a socket of
20819 this type, use "SocksPort unix:/path/to/socket". Implements
20821 - Support mapping hidden service virtual ports to AF_UNIX sockets.
20822 The syntax is "HiddenServicePort 80 unix:/path/to/socket".
20823 Implements ticket 11485.
20825 o Major features (changed defaults):
20826 - Prevent relay operators from unintentionally running exits: When a
20827 relay is configured as an exit node, we now warn the user unless
20828 the "ExitRelay" option is set to 1. We warn even more loudly if
20829 the relay is configured with the default exit policy, since this
20830 can indicate accidental misconfiguration. Setting "ExitRelay 0"
20831 stops Tor from running as an exit relay. Closes ticket 10067.
20833 o Major features (directory system):
20834 - When downloading server- or microdescriptors from a directory
20835 server, we no longer launch multiple simultaneous requests to the
20836 same server. This reduces load on the directory servers,
20837 especially when directory guards are in use. Closes ticket 9969.
20838 - When downloading server- or microdescriptors over a tunneled
20839 connection, do not limit the length of our requests to what the
20840 Squid proxy is willing to handle. Part of ticket 9969.
20841 - Authorities can now vote on the correct digests and latest
20842 versions for different software packages. This allows packages
20843 that include Tor to use the Tor authority system as a way to get
20844 notified of updates and their correct digests. Implements proposal
20845 227. Closes ticket 10395.
20847 o Major features (guards):
20848 - Introduce the Guardfraction feature to improves load balancing on
20849 guard nodes. Specifically, it aims to reduce the traffic gap that
20850 guard nodes experience when they first get the Guard flag. This is
20851 a required step if we want to increase the guard lifetime to 9
20852 months or greater. Closes ticket 9321.
20854 o Major features (performance):
20855 - Make the CPU worker implementation more efficient by avoiding the
20856 kernel and lengthening pipelines. The original implementation used
20857 sockets to transfer data from the main thread to the workers, and
20858 didn't allow any thread to be assigned more than a single piece of
20859 work at once. The new implementation avoids communications
20860 overhead by making requests in shared memory, avoiding kernel IO
20861 where possible, and keeping more requests in flight at once.
20862 Implements ticket 9682.
20864 o Major features (relay):
20865 - Raise the minimum acceptable configured bandwidth rate for bridges
20866 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
20867 20 KiB/sec.) Closes ticket 13822.
20869 o Major bugfixes (exit node stability):
20870 - Fix an assertion failure that could occur under high DNS load.
20871 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20872 diagnosed and fixed by "cypherpunks".
20874 o Major bugfixes (mixed relay-client operation):
20875 - When running as a relay and client at the same time (not
20876 recommended), if we decide not to use a new guard because we want
20877 to retry older guards, only close the locally-originating circuits
20878 passing through that guard. Previously we would close all the
20879 circuits through that guard. Fixes bug 9819; bugfix on
20880 0.2.1.1-alpha. Reported by "skruffy".
20882 o Minor features (build):
20883 - New --disable-system-torrc compile-time option to prevent Tor from
20884 looking for the system-wide torrc or torrc-defaults files.
20885 Resolves ticket 13037.
20887 o Minor features (controller):
20888 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
20889 events so controllers can observe circuit isolation inputs. Closes
20891 - ControlPort now supports the unix:/path/to/socket syntax as an
20892 alternative to the ControlSocket option, for consistency with
20893 SocksPort and HiddenServicePort. Closes ticket 14451.
20894 - New "GETINFO bw-event-cache" to get information about recent
20895 bandwidth events. Closes ticket 14128. Useful for controllers to
20896 get recent bandwidth history after the fix for ticket 13988.
20898 o Minor features (Denial of service resistance):
20899 - Count the total number of bytes used storing hidden service
20900 descriptors against the value of MaxMemInQueues. If we're low on
20901 memory, and more than 20% of our memory is used holding hidden
20902 service descriptors, free them until no more than 10% of our
20903 memory holds hidden service descriptors. Free the least recently
20904 fetched descriptors first. Resolves ticket 13806.
20905 - When we have recently been under memory pressure (over 3/4 of
20906 MaxMemInQueues is allocated), then allocate smaller zlib objects
20907 for small requests. Closes ticket 11791.
20909 o Minor features (geoip):
20910 - Update geoip and geoip6 files to the January 7 2015 Maxmind
20911 GeoLite2 Country database.
20913 o Minor features (guard nodes):
20914 - Reduce the time delay before saving guard status to disk from 10
20915 minutes to 30 seconds (or from one hour to 10 minutes if
20916 AvoidDiskWrites is set). Closes ticket 12485.
20918 o Minor features (hidden service):
20919 - Make Sybil attacks against hidden services harder by changing the
20920 minimum time required to get the HSDir flag from 25 hours up to 96
20921 hours. Addresses ticket 14149.
20922 - New option "HiddenServiceAllowUnknownPorts" to allow hidden
20923 services to disable the anti-scanning feature introduced in
20924 0.2.6.2-alpha. With this option not set, a connection to an
20925 unlisted port closes the circuit. With this option set, only a
20926 RELAY_DONE cell is sent. Closes ticket 14084.
20928 o Minor features (interface):
20929 - Implement "-f -" command-line option to read torrc configuration
20930 from standard input, if you don't want to store the torrc file in
20931 the file system. Implements feature 13865.
20933 o Minor features (logging):
20934 - Add a count of unique clients to the bridge heartbeat message.
20935 Resolves ticket 6852.
20936 - Suppress "router info incompatible with extra info" message when
20937 reading extrainfo documents from cache. (This message got loud
20938 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
20940 - Elevate hidden service authorized-client message from DEBUG to
20941 INFO. Closes ticket 14015.
20943 o Minor features (stability):
20944 - Add assertions in our hash-table iteration code to check for
20945 corrupted values that could cause infinite loops. Closes
20948 o Minor features (systemd):
20949 - Various improvements and modernizations in systemd hardening
20950 support. Closes ticket 13805. Patch from Craig Andrews.
20952 o Minor features (testing networks):
20953 - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
20954 and the default on a testing network to 2 minutes. Drop the
20955 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
20956 keep the default on a testing network at 30 seconds. This reduces
20957 HS bootstrap time to around 25 seconds. Also, change the default
20958 time in test-network.sh to match. Closes ticket 13401. Patch
20960 - Create TestingDirAuthVoteHSDir to correspond to
20961 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
20962 HSDir flag for the listed relays regardless of uptime or ORPort
20963 connectivity. Respects the value of VoteOnHidServDirectoriesV2.
20964 Partial implementation for ticket 14067. Patch by "teor".
20966 o Minor features (tor2web mode):
20967 - Introduce the config option Tor2webRendezvousPoints, which allows
20968 clients in Tor2webMode to select a specific Rendezvous Point to be
20969 used in HS circuits. This might allow better performance for
20970 Tor2Web nodes. Implements ticket 12844.
20972 o Minor bugfixes (client DNS):
20973 - Report the correct cached DNS expiration times on SOCKS port or in
20974 DNS replies. Previously, we would report everything as "never
20975 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
20976 - Avoid a small memory leak when we find a cached answer for a
20977 reverse DNS lookup in a client-side DNS cache. (Remember, client-
20978 side DNS caching is off by default, and is not recommended.) Fixes
20979 bug 14259; bugfix on 0.2.0.1-alpha.
20981 o Minor bugfixes (client, automapping):
20982 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
20983 no value follows the option. Fixes bug 14142; bugfix on
20984 0.2.4.7-alpha. Patch by "teor".
20985 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
20986 14195; bugfix on 0.1.0.1-rc.
20987 - Prevent changes to other options from removing the wildcard value
20988 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
20990 - Allow MapAddress and AutomapHostsOnResolve to work together when
20991 an address is mapped into another address type (like .onion) that
20992 must be automapped at resolve time. Fixes bug 7555; bugfix
20995 o Minor bugfixes (client, bridges):
20996 - When we are using bridges and we had a network connectivity
20997 problem, only retry connecting to our currently configured
20998 bridges, not all bridges we know about and remember using. Fixes
20999 bug 14216; bugfix on 0.2.2.17-alpha.
21001 o Minor bugfixes (client, IPv6):
21002 - Reject socks requests to literal IPv6 addresses when IPv6Traffic
21003 flag is not set; and not because the NoIPv4Traffic flag was set.
21004 Previously we'd looked at the NoIPv4Traffic flag for both types of
21005 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
21007 o Minor bugfixes (compilation):
21008 - The address of an array in the middle of a structure will always
21009 be non-NULL. clang recognises this and complains. Disable the
21010 tautologous and redundant check to silence this warning. Fixes bug
21011 14001; bugfix on 0.2.1.2-alpha.
21012 - Avoid warnings when building with systemd 209 or later. Fixes bug
21013 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
21014 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
21015 Addresses ticket 14188.
21016 - Build without warnings with the stock OpenSSL srtp.h header, which
21017 has a duplicate declaration of SSL_get_selected_srtp_profile().
21018 Fixes bug 14220; this is OpenSSL's bug, not ours.
21019 - Do not compile any code related to Tor2Web mode when Tor2Web mode
21020 is not enabled at compile time. Previously, this code was included
21021 in a disabled state. See discussion on ticket 12844.
21022 - Remove the --disable-threads configure option again. It was
21023 accidentally partially reintroduced in 29ac883606d6d. Fixes bug
21024 14819; bugfix on 0.2.6.2-alpha.
21026 o Minor bugfixes (controller):
21027 - Report "down" in response to the "GETINFO entry-guards" command
21028 when relays are down with an unreachable_since value. Previously,
21029 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
21030 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
21031 14116; bugfix on 0.2.2.9-alpha.
21032 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
21033 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
21035 o Minor bugfixes (directory authority):
21036 - Allow directory authorities to fetch more data from one another if
21037 they find themselves missing lots of votes. Previously, they had
21038 been bumping against the 10 MB queued data limit. Fixes bug 14261;
21039 bugfix on 0.1.2.5-alpha.
21040 - Do not attempt to download extrainfo documents which we will be
21041 unable to validate with a matching server descriptor. Fixes bug
21042 13762; bugfix on 0.2.0.1-alpha.
21043 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
21044 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
21045 - Enlarge the buffer to read bwauth generated files to avoid an
21046 issue when parsing the file in dirserv_read_measured_bandwidths().
21047 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
21049 o Minor bugfixes (file handling):
21050 - Stop failing when key files are zero-length. Instead, generate new
21051 keys, and overwrite the empty key files. Fixes bug 13111; bugfix
21052 on all versions of Tor. Patch by "teor".
21053 - Stop generating a fresh .old RSA onion key file when the .old file
21054 is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
21055 - Avoid overwriting .old key files with empty key files.
21056 - Skip loading zero-length extrainfo store, router store, stats,
21057 state, and key files.
21058 - Avoid crashing when trying to reload a torrc specified as a
21059 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
21062 o Minor bugfixes (hidden services):
21063 - Close the introduction circuit when we have no more usable intro
21064 points, instead of waiting for it to time out. This also ensures
21065 that no follow-up HS descriptor fetch is triggered when the
21066 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
21067 - When fetching a hidden service descriptor for a down service that
21068 was recently up, do not keep refetching until we try the same
21069 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
21070 - Successfully launch Tor with a nonexistent hidden service
21071 directory. Our fix for bug 13942 didn't catch this case. Fixes bug
21072 14106; bugfix on 0.2.6.2-alpha.
21074 o Minor bugfixes (logging):
21075 - Avoid crashing when there are more log domains than entries in
21076 domain_list. Bugfix on 0.2.3.1-alpha.
21077 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
21079 - Don't log messages to stdout twice when starting up. Fixes bug
21080 13993; bugfix on 0.2.6.1-alpha.
21082 o Minor bugfixes (parsing):
21083 - Stop accepting milliseconds (or other junk) at the end of
21084 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
21085 - Support two-number and three-number version numbers correctly, in
21086 case we change the Tor versioning system in the future. Fixes bug
21087 13661; bugfix on 0.0.8pre1.
21089 o Minor bugfixes (path counting):
21090 - When deciding whether the consensus lists any exit nodes, count
21091 the number listed in the consensus, not the number we have
21092 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
21093 - When deciding whether we have any exit nodes, only examine
21094 ExitNodes when the ExitNodes option is actually set. Fixes part of
21095 bug 14918; bugfix on 0.2.6.2-alpha.
21096 - Get rid of redundant and possibly scary warnings that we are
21097 missing directory information while we bootstrap. Fixes part of
21098 bug 14918; bugfix on 0.2.6.2-alpha.
21100 o Minor bugfixes (portability):
21101 - Fix the ioctl()-based network interface lookup code so that it
21102 will work on systems that have variable-length struct ifreq, for
21104 - Fix scheduler compilation on targets where char is unsigned. Fixes
21105 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
21107 o Minor bugfixes (sandbox):
21108 - Allow glibc fatal errors to be sent to stderr before Tor exits.
21109 Previously, glibc would try to write them to /dev/tty, and the
21110 sandbox would trap the call and make Tor exit prematurely. Fixes
21111 bug 14759; bugfix on 0.2.5.1-alpha.
21113 o Minor bugfixes (shutdown):
21114 - When shutting down, always call event_del() on lingering read or
21115 write events before freeing them. Otherwise, we risk double-frees
21116 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
21119 o Minor bugfixes (small memory leaks):
21120 - Avoid leaking memory when using IPv6 virtual address mappings.
21121 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
21124 o Minor bugfixes (statistics):
21125 - Increase period over which bandwidth observations are aggregated
21126 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
21128 o Minor bugfixes (systemd support):
21129 - Fix detection and operation of systemd watchdog. Fixes part of bug
21130 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
21131 - Run correctly under systemd with the RunAsDaemon option set. Fixes
21132 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
21133 - Inform the systemd supervisor about more changes in the Tor
21134 process status. Implements part of ticket 14141. Patch from
21136 - Cause the "--disable-systemd" option to actually disable systemd
21137 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
21140 o Minor bugfixes (TLS):
21141 - Check more thoroughly throughout the TLS code for possible
21142 unlogged TLS errors. Possible diagnostic or fix for bug 13319.
21144 o Minor bugfixes (transparent proxy):
21145 - Use getsockname, not getsockopt, to retrieve the address for a
21146 TPROXY-redirected connection. Fixes bug 13796; bugfix
21149 o Code simplification and refactoring:
21150 - Move fields related to isolating and configuring client ports into
21151 a shared structure. Previously, they were duplicated across
21152 port_cfg_t, listener_connection_t, and edge_connection_t. Failure
21153 to copy them correctly had been the cause of at least one bug in
21154 the past. Closes ticket 8546.
21155 - Refactor the get_interface_addresses_raw() doom-function into
21156 multiple smaller and simpler subfunctions. Cover the resulting
21157 subfunctions with unit-tests. Fixes a significant portion of
21159 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
21160 only for version <= 0.2.2.24 which is now deprecated. Closes
21162 - Remove a test for a long-defunct broken version-one
21166 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
21167 for writing the OpenBSD-specific tips. Resolves ticket 13702.
21168 - Make the tor-resolve documentation match its help string and its
21169 options. Resolves part of ticket 14325.
21170 - Log a more useful error message from tor-resolve when failing to
21171 look up a hidden service address. Resolves part of ticket 14325.
21173 o Downgraded warnings:
21174 - Don't warn when we've attempted to contact a relay using the wrong
21175 ntor onion key. Closes ticket 9635.
21177 o Removed features:
21178 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
21179 longer silently accepted as an alias for "ExitNodes".
21180 - The --enable-mempool and --enable-buf-freelists options, which
21181 were originally created to work around bad malloc implementations,
21182 no longer exist. They were off-by-default in 0.2.5. Closes
21186 - Make the checkdir/perms test complete successfully even if the
21187 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
21188 - Test that tor does not fail when key files are zero-length. Check
21189 that tor generates new keys, and overwrites the empty key files.
21190 - Test that tor generates new keys when keys are missing
21191 (existing behavior).
21192 - Test that tor does not overwrite key files that already contain
21193 data (existing behavior). Tests bug 13111. Patch by "teor".
21194 - New "make test-stem" target to run stem integration tests.
21195 Requires that the "STEM_SOURCE_DIR" environment variable be set.
21196 Closes ticket 14107.
21197 - Make the test_cmdline_args.py script work correctly on Windows.
21198 Patch from Gisle Vanem.
21199 - Move the slower unit tests into a new "./src/test/test-slow"
21200 binary that can be run independently of the other tests. Closes
21202 - Avoid undefined behavior when sampling huge values from the
21203 Laplace distribution. This made unittests fail on Raspberry Pi.
21204 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
21207 Changes in version 0.2.6.2-alpha - 2014-12-31
21208 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
21209 It introduces a major new backend for deciding when to send cells on
21210 channels, which should lead down the road to big performance
21211 increases. It contains security and statistics features for better
21212 work on hidden services, and numerous bugfixes.
21214 This release contains many new unit tests, along with major
21215 performance improvements for running testing networks using Chutney.
21216 Thanks to a series of patches contributed by "teor", testing networks
21217 should now bootstrap in seconds, rather than minutes.
21219 o Major features (relay, infrastructure):
21220 - Complete revision of the code that relays use to decide which cell
21221 to send next. Formerly, we selected the best circuit to write on
21222 each channel, but we didn't select among channels in any
21223 sophisticated way. Now, we choose the best circuits globally from
21224 among those whose channels are ready to deliver traffic.
21226 This patch implements a new inter-cmux comparison API, a global
21227 high/low watermark mechanism and a global scheduler loop for
21228 transmission prioritization across all channels as well as among
21229 circuits on one channel. This schedule is currently tuned to
21230 (tolerantly) avoid making changes in network performance, but it
21231 should form the basis for major circuit performance increases in
21232 the future. Code by Andrea; tuning by Rob Jansen; implements
21235 o Major features (hidden services):
21236 - Make HS port scanning more difficult by immediately closing the
21237 circuit when a user attempts to connect to a nonexistent port.
21238 Closes ticket 13667.
21239 - Add a HiddenServiceStatistics option that allows Tor relays to
21240 gather and publish statistics about the overall size and volume of
21241 hidden service usage. Specifically, when this option is turned on,
21242 an HSDir will publish an approximate number of hidden services
21243 that have published descriptors to it the past 24 hours. Also, if
21244 a relay has acted as a hidden service rendezvous point, it will
21245 publish the approximate amount of rendezvous cells it has relayed
21246 the past 24 hours. The statistics themselves are obfuscated so
21247 that the exact values cannot be derived. For more details see
21248 proposal 238, "Better hidden service stats from Tor relays". This
21249 feature is currently disabled by default. Implements feature 13192.
21251 o Major bugfixes (client, automap):
21252 - Repair automapping with IPv6 addresses. This automapping should
21253 have worked previously, but one piece of debugging code that we
21254 inserted to detect a regression actually caused the regression to
21255 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
21256 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
21259 o Major bugfixes (hidden services):
21260 - When closing an introduction circuit that was opened in parallel
21261 with others, don't mark the introduction point as unreachable.
21262 Previously, the first successful connection to an introduction
21263 point would make the other introduction points get marked as
21264 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
21266 o Directory authority changes:
21267 - Remove turtles as a directory authority.
21268 - Add longclaw as a new (v3) directory authority. This implements
21269 ticket 13296. This keeps the directory authority count at 9.
21271 o Major removed features:
21272 - Tor clients no longer support connecting to hidden services
21273 running on Tor 0.2.2.x and earlier; the Support022HiddenServices
21274 option has been removed. (There shouldn't be any hidden services
21275 running these versions on the network.) Closes ticket 7803.
21277 o Minor features (client):
21278 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
21279 is enabled, reject requests with IP addresses as hostnames.
21280 Resolves ticket 13315.
21282 o Minor features (controller):
21283 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
21284 write an unscheduled heartbeat message to the log. Implements
21287 o Minor features (geoip):
21288 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
21291 o Minor features (hidden services):
21292 - When re-enabling the network, don't try to build introduction
21293 circuits until we have successfully built a circuit. This makes
21294 hidden services come up faster when the network is re-enabled.
21295 Patch from "akwizgran". Closes ticket 13447.
21296 - When we fail to retrieve a hidden service descriptor, send the
21297 controller an "HS_DESC FAILED" controller event. Implements
21299 - New HiddenServiceDirGroupReadable option to cause hidden service
21300 directories and hostname files to be created group-readable. Patch
21301 from "anon", David Stainton, and "meejah". Closes ticket 11291.
21303 o Minor features (systemd):
21304 - Where supported, when running with systemd, report successful
21305 startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
21306 - When running with systemd, support systemd watchdog messages. Part
21307 of ticket 11016. Patch by Michael Scherer.
21309 o Minor features (transparent proxy):
21310 - Update the transparent proxy option checks to allow for both ipfw
21311 and pf on OS X. Closes ticket 14002.
21312 - Use the correct option when using IPv6 with transparent proxy
21313 support on Linux. Resolves 13808. Patch by Francisco Blas
21316 o Minor bugfixes (preventative security, C safety):
21317 - When reading a hexadecimal, base-32, or base-64 encoded value from
21318 a string, always overwrite the whole output buffer. This prevents
21319 some bugs where we would look at (but fortunately, not reveal)
21320 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
21322 - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
21323 just the part that's used. This makes it harder for data leak bugs
21324 to occur in the event of other programming failures. Resolves
21327 o Minor bugfixes (client, microdescriptors):
21328 - Use a full 256 bits of the SHA256 digest of a microdescriptor when
21329 computing which microdescriptors to download. This keeps us from
21330 erroneous download behavior if two microdescriptor digests ever
21331 have the same first 160 bits. Fixes part of bug 13399; bugfix
21333 - Reset a router's status if its microdescriptor digest changes,
21334 even if the first 160 bits remain the same. Fixes part of bug
21335 13399; bugfix on 0.2.3.1-alpha.
21337 o Minor bugfixes (compilation):
21338 - Silence clang warnings under --enable-expensive-hardening,
21339 including implicit truncation of 64 bit values to 32 bit, const
21340 char assignment to self, tautological compare, and additional
21341 parentheses around equality tests. Fixes bug 13577; bugfix
21343 - Fix a clang warning about checking whether an address in the
21344 middle of a structure is NULL. Fixes bug 14001; bugfix
21347 o Minor bugfixes (hidden services):
21348 - Correctly send a controller event when we find that a rendezvous
21349 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
21350 - Pre-check directory permissions for new hidden-services to avoid
21351 at least one case of "Bug: Acting on config options left us in a
21352 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
21353 - When adding a new hidden service (for example, via SETCONF), Tor
21354 no longer congratulates the user for running a relay. Fixes bug
21355 13941; bugfix on 0.2.6.1-alpha.
21356 - When fetching hidden service descriptors, we now check not only
21357 for whether we got the hidden service we had in mind, but also
21358 whether we got the particular descriptors we wanted. This prevents
21359 a class of inefficient but annoying DoS attacks by hidden service
21360 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
21363 o Minor bugfixes (Linux seccomp2 sandbox):
21364 - Make transparent proxy support work along with the seccomp2
21365 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
21366 by Francisco Blas Izquierdo Riera.
21367 - Fix a memory leak in tor-resolve when running with the sandbox
21368 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
21370 o Minor bugfixes (logging):
21371 - Downgrade warnings about RSA signature failures to info log level.
21372 Emit a warning when an extra info document is found incompatible
21373 with a corresponding router descriptor. Fixes bug 9812; bugfix
21375 - Make connection_ap_handshake_attach_circuit() log the circuit ID
21376 correctly. Fixes bug 13701; bugfix on 0.0.6.
21378 o Minor bugfixes (misc):
21379 - Stop allowing invalid address patterns like "*/24" that contain
21380 both a wildcard address and a bit prefix length. This affects all
21381 our address-range parsing code. Fixes bug 7484; bugfix
21384 o Minor bugfixes (testing networks, fast startup):
21385 - Allow Tor to build circuits using a consensus with no exits. If
21386 the consensus has no exits (typical of a bootstrapping test
21387 network), allow Tor to build circuits once enough descriptors have
21388 been downloaded. This assists in bootstrapping a testing Tor
21389 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
21391 - When V3AuthVotingInterval is low, give a lower If-Modified-Since
21392 header to directory servers. This allows us to obtain consensuses
21393 promptly when the consensus interval is very short. This assists
21394 in bootstrapping a testing Tor network. Fixes parts of bugs 13718
21395 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
21396 - Stop assuming that private addresses are local when checking
21397 reachability in a TestingTorNetwork. Instead, when testing, assume
21398 all OR connections are remote. (This is necessary due to many test
21399 scenarios running all relays on localhost.) This assists in
21400 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
21401 0.1.0.1-rc. Patch by "teor".
21402 - Avoid building exit circuits from a consensus with no exits. Now
21403 thanks to our fix for 13718, we accept a no-exit network as not
21404 wholly lost, but we need to remember not to try to build exit
21405 circuits on it. Closes ticket 13814; patch by "teor".
21406 - Stop requiring exits to have non-zero bandwithcapacity in a
21407 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
21408 ignore exit bandwidthcapacity. This assists in bootstrapping a
21409 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
21410 on 0.2.0.3-alpha. Patch by "teor".
21411 - Add "internal" to some bootstrap statuses when no exits are
21412 available. If the consensus does not contain Exits, Tor will only
21413 build internal circuits. In this case, relevant statuses will
21414 contain the word "internal" as indicated in the Tor control-
21415 spec.txt. When bootstrap completes, Tor will be ready to build
21416 internal circuits. If a future consensus contains Exits, exit
21417 circuits may become available. Fixes part of bug 13718; bugfix on
21418 0.2.4.10-alpha. Patch by "teor".
21419 - Decrease minimum consensus interval to 10 seconds when
21420 TestingTorNetwork is set, or 5 seconds for the first consensus.
21421 Fix assumptions throughout the code that assume larger intervals.
21422 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
21424 - Avoid excluding guards from path building in minimal test
21425 networks, when we're in a test network and excluding guards would
21426 exclude all relays. This typically occurs in incredibly small tor
21427 networks, and those using "TestingAuthVoteGuard *". Fixes part of
21428 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
21430 o Code simplification and refactoring:
21431 - Stop using can_complete_circuits as a global variable; access it
21432 with a function instead.
21433 - Avoid using operators directly as macro arguments: this lets us
21434 apply coccinelle transformations to our codebase more directly.
21435 Closes ticket 13172.
21436 - Combine the functions used to parse ClientTransportPlugin and
21437 ServerTransportPlugin into a single function. Closes ticket 6456.
21438 - Add inline functions and convenience macros for inspecting channel
21439 state. Refactor the code to use convenience macros instead of
21440 checking channel state directly. Fixes issue 7356.
21441 - Document all members of was_router_added_t and rename
21442 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
21443 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
21444 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
21445 constant instead of hardcoded value. Fixes issue 13840.
21446 - Refactor our generic strmap and digestmap types into a single
21447 implementation, so that we can add a new digest256map
21451 - Document the bridge-authority-only 'networkstatus-bridges' file.
21452 Closes ticket 13713; patch from "tom".
21453 - Fix typo in PredictedPortsRelevanceTime option description in
21454 manpage. Resolves issue 13707.
21455 - Stop suggesting that users specify relays by nickname: it isn't a
21456 good idea. Also, properly cross-reference how to specify relays in
21457 all parts of manual documenting options that take a list of
21458 relays. Closes ticket 13381.
21459 - Clarify the HiddenServiceDir option description in manpage to make
21460 it clear that relative paths are taken with respect to the current
21461 working directory. Also clarify that this behavior is not
21462 guaranteed to remain indefinitely. Fixes issue 13913.
21465 - New tests for many parts of channel, relay, and circuitmux
21466 functionality. Code by Andrea; part of 9262.
21467 - New tests for parse_transport_line(). Part of ticket 6456.
21468 - In the unit tests, use chgrp() to change the group of the unit
21469 test temporary directory to the current user, so that the sticky
21470 bit doesn't interfere with tests that check directory groups.
21472 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
21476 Changes in version 0.2.6.1-alpha - 2014-10-30
21477 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
21478 includes numerous code cleanups and new tests, and fixes a large
21479 number of annoying bugs. Out-of-memory conditions are handled better
21480 than in 0.2.5, pluggable transports have improved proxy support, and
21481 clients now use optimistic data for contacting hidden services. Also,
21482 we are now more robust to changes in what we consider a parseable
21483 directory object, so that tightening restrictions does not have a risk
21484 of introducing infinite download loops.
21486 This is the first alpha release in a new series, so expect there to be
21487 bugs. Users who would rather test out a more stable branch should stay
21488 with 0.2.5.x for now.
21490 o New compiler and system requirements:
21491 - Tor 0.2.6.x requires that your compiler support more of the C99
21492 language standard than before. The 'configure' script now detects
21493 whether your compiler supports C99 mid-block declarations and
21494 designated initializers. If it does not, Tor will not compile.
21496 We may revisit this requirement if it turns out that a significant
21497 number of people need to build Tor with compilers that don't
21498 bother implementing a 15-year-old standard. Closes ticket 13233.
21499 - Tor no longer supports systems without threading support. When we
21500 began working on Tor, there were several systems that didn't have
21501 threads, or where the thread support wasn't able to run the
21502 threads of a single process on multiple CPUs. That no longer
21503 holds: every system where Tor needs to run well now has threading
21504 support. Resolves ticket 12439.
21506 o Removed platform support:
21507 - We no longer include special code to build on Windows CE; as far
21508 as we know, nobody has used Tor on Windows CE in a very long time.
21509 Closes ticket 11446.
21511 o Major features (bridges):
21512 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
21513 transports if they are configured via the "TOR_PT_PROXY"
21514 environment variable. Implements proposal 232. Resolves
21517 o Major features (client performance, hidden services):
21518 - Allow clients to use optimistic data when connecting to a hidden
21519 service, which should remove a round-trip from hidden service
21520 initialization. See proposal 181 for details. Implements
21523 o Major features (directory system):
21524 - Upon receiving an unparseable directory object, if its digest
21525 matches what we expected, then don't try to download it again.
21526 Previously, when we got a descriptor we didn't like, we would keep
21527 trying to download it over and over. Closes ticket 11243.
21529 o Major features (sample torrc):
21530 - Add a new, infrequently-changed "torrc.minimal". This file is
21531 similar to torrc.sample, but it will change as infrequently as
21532 possible, for the benefit of users whose systems prompt them for
21533 intervention whenever a default configuration file is changed.
21534 Making this change allows us to update torrc.sample to be a more
21535 generally useful "sample torrc".
21537 o Major bugfixes (directory authorities):
21538 - Do not assign the HSDir flag to relays if they are not Valid, or
21539 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
21541 o Major bugfixes (directory bandwidth performance):
21542 - Don't flush the zlib buffer aggressively when compressing
21543 directory information for clients. This should save about 7% of
21544 the bandwidth currently used for compressed descriptors and
21545 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
21547 o Minor features (security, memory wiping):
21548 - Ensure we securely wipe keys from memory after
21549 crypto_digest_get_digest and init_curve25519_keypair_from_file
21550 have finished using them. Resolves ticket 13477.
21552 o Minor features (security, out-of-memory handling):
21553 - When handling an out-of-memory condition, allocate less memory for
21554 temporary data structures. Fixes issue 10115.
21555 - When handling an out-of-memory condition, consider more types of
21556 buffers, including those on directory connections, and zlib
21557 buffers. Resolves ticket 11792.
21560 - When identity keypair is generated for first time, log a
21561 congratulatory message that links to the new relay lifecycle
21562 document. Implements feature 10427.
21564 o Minor features (client):
21565 - Clients are now willing to send optimistic data (before they
21566 receive a 'connected' cell) to relays of any version. (Relays
21567 without support for optimistic data are no longer supported on the
21568 Tor network.) Resolves ticket 13153.
21570 o Minor features (directory authorities):
21571 - Don't list relays with a bandwidth estimate of 0 in the consensus.
21572 Implements a feature proposed during discussion of bug 13000.
21573 - In tor-gencert, report an error if the user provides the same
21574 argument more than once.
21575 - If a directory authority can't find a best consensus method in the
21576 votes that it holds, it now falls back to its favorite consensus
21577 method. Previously, it fell back to method 1. Neither of these is
21578 likely to get enough signatures, but "fall back to favorite"
21579 doesn't require us to maintain support an obsolete consensus
21580 method. Implements part of proposal 215.
21582 o Minor features (logging):
21583 - On Unix-like systems, you can now use named pipes as the target of
21584 the Log option, and other options that try to append to files.
21585 Closes ticket 12061. Patch from "carlo von lynX".
21586 - When opening a log file at startup, send it every log message that
21587 we generated between startup and opening it. Previously, log
21588 messages that were generated before opening the log file were only
21589 logged to stdout. Closes ticket 6938.
21590 - Add a TruncateLogFile option to overwrite logs instead of
21591 appending to them. Closes ticket 5583.
21593 o Minor features (portability, Solaris):
21594 - Threads are no longer disabled by default on Solaris; we believe
21595 that the versions of Solaris with broken threading support are all
21596 obsolete by now. Resolves ticket 9495.
21598 o Minor features (relay):
21599 - Re-check our address after we detect a changed IP address from
21600 getsockname(). This ensures that the controller command "GETINFO
21601 address" will report the correct value. Resolves ticket 11582.
21603 - A new AccountingRule option lets Relays set whether they'd like
21604 AccountingMax to be applied separately to inbound and outbound
21605 traffic, or applied to the sum of inbound and outbound traffic.
21606 Resolves ticket 961. Patch by "chobe".
21608 o Minor features (testing networks):
21609 - Add the TestingDirAuthVoteExit option, which lists nodes to assign
21610 the "Exit" flag regardless of their uptime, bandwidth, or exit
21611 policy. TestingTorNetwork must be set for this option to have any
21612 effect. Previously, authorities would take up to 35 minutes to
21613 give nodes the Exit flag in a test network. Partially implements
21616 o Minor features (validation):
21617 - Check all date/time values passed to tor_timegm and
21618 parse_rfc1123_time for validity, taking leap years into account.
21619 Improves HTTP header validation. Implemented with bug 13476.
21620 - In correct_tm(), limit the range of values returned by system
21621 localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
21622 This means we don't have to deal with negative or too large dates,
21623 even if a clock is wrong. Otherwise we might fail to read a file
21624 written by us which includes such a date. Fixes bug 13476.
21626 o Minor bugfixes (bridge clients):
21627 - When configured to use a bridge without an identity digest (not
21628 recommended), avoid launching an extra channel to it when
21629 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
21631 o Minor bugfixes (bridges):
21632 - When DisableNetwork is set, do not launch pluggable transport
21633 plugins, and if any are running, terminate them. Fixes bug 13213;
21634 bugfix on 0.2.3.6-alpha.
21636 o Minor bugfixes (C correctness):
21637 - Fix several instances of possible integer overflow/underflow/NaN.
21638 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
21640 - In circuit_build_times_calculate_timeout() in circuitstats.c,
21641 avoid dividing by zero in the pareto calculations. This traps
21642 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
21644 - Fix an integer overflow in format_time_interval(). Fixes bug
21645 13393; bugfix on 0.2.0.10-alpha.
21646 - Set the correct day of year value when the system's localtime(_r)
21647 or gmtime(_r) functions fail to set struct tm. Not externally
21648 visible. Fixes bug 13476; bugfix on 0.0.2pre14.
21649 - Avoid unlikely signed integer overflow in tor_timegm on systems
21650 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
21652 o Minor bugfixes (client):
21653 - Fix smartlist_choose_node_by_bandwidth() so that relays with the
21654 BadExit flag are not considered worthy candidates. Fixes bug
21655 13066; bugfix on 0.1.2.3-alpha.
21656 - Use the consensus schedule for downloading consensuses, and not
21657 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
21658 - Handle unsupported or malformed SOCKS5 requests properly by
21659 responding with the appropriate error message before closing the
21660 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
21662 o Minor bugfixes (client, torrc):
21663 - Stop modifying the value of our DirReqStatistics torrc option just
21664 because we're not a bridge or relay. This bug was causing Tor
21665 Browser users to write "DirReqStatistics 0" in their torrc files
21666 as if they had chosen to change the config. Fixes bug 4244; bugfix
21668 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
21669 that our options have changed every time we SIGHUP. Fixes bug
21670 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
21672 o Minor bugfixes (controller):
21673 - Return an error when the second or later arguments of the
21674 "setevents" controller command are invalid events. Previously we
21675 would return success while silently skipping invalid events. Fixes
21676 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
21678 o Minor bugfixes (directory system):
21679 - Always believe that v3 directory authorities serve extra-info
21680 documents, whether they advertise "caches-extra-info" or not.
21681 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
21682 - When running as a v3 directory authority, advertise that you serve
21683 extra-info documents so that clients who want them can find them
21684 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
21685 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
21686 Previously, directories offering BRIDGE_DIRINFO and some other
21687 flag (i.e. microdescriptors or extrainfo) would be ignored when
21688 looking for bridges. Partially fixes bug 13163; bugfix
21691 o Minor bugfixes (networking):
21692 - Check for orconns and use connection_or_close_for_error() rather
21693 than connection_mark_for_close() directly in the getsockopt()
21694 failure case of connection_handle_write_impl(). Fixes bug 11302;
21695 bugfix on 0.2.4.4-alpha.
21697 o Minor bugfixes (relay):
21698 - When generating our family list, remove spaces from around the
21699 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
21700 - If our previous bandwidth estimate was 0 bytes, allow publishing a
21701 new relay descriptor immediately. Fixes bug 13000; bugfix
21704 o Minor bugfixes (testing networks):
21705 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
21706 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
21707 - Stop using the default authorities in networks which provide both
21708 AlternateDirAuthority and AlternateBridgeAuthority. Partially
21709 fixes bug 13163; bugfix on 0.2.0.13-alpha.
21711 o Minor bugfixes (testing):
21712 - Stop spawn test failures due to a race condition between the
21713 SIGCHLD handler updating the process status, and the test reading
21714 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
21716 o Minor bugfixes (testing, Windows):
21717 - Avoid passing an extra backslash when creating a temporary
21718 directory for running the unit tests on Windows. Fixes bug 12392;
21719 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
21721 o Minor bugfixes (windows):
21722 - Remove code to special-case handling of NTE_BAD_KEYSET when
21723 acquiring windows CryptoAPI context. This error can't actually
21724 occur for the parameters we're providing. Fixes bug 10816; bugfix
21727 o Minor bugfixes (zlib):
21728 - Avoid truncating a zlib stream when trying to finalize it with an
21729 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
21732 - Allow our configure script to build correctly with autoconf 2.62
21733 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
21734 - Improve the error message from ./configure to make it clear that
21735 when asciidoc has not been found, the user will have to either add
21736 --disable-asciidoc argument or install asciidoc. Resolves
21739 o Code simplification and refactoring:
21740 - Change the entry_is_live() function to take named bitfield
21741 elements instead of an unnamed list of booleans. Closes
21743 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
21744 Resolves ticket 12205.
21745 - Use calloc and reallocarray functions instead of multiply-
21746 then-malloc. This makes it less likely for us to fall victim to an
21747 integer overflow attack when allocating. Resolves ticket 12855.
21748 - Use the standard macro name SIZE_MAX, instead of our
21750 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
21751 functions which take them as arguments. Replace 0 with NO_DIRINFO
21752 in a function call for clarity. Seeks to prevent future issues
21754 - Avoid 4 null pointer errors under clang static analysis by using
21755 tor_assert() to prove that the pointers aren't null. Fixes
21757 - Rework the API of policies_parse_exit_policy() to use a bitmask to
21758 represent parsing options, instead of a confusing mess of
21759 booleans. Resolves ticket 8197.
21760 - Introduce a helper function to parse ExitPolicy in
21761 or_options_t structure.
21764 - Add a doc/TUNING document with tips for handling large numbers of
21765 TCP connections when running busy Tor relay. Update the warning
21766 message to point to this file when running out of sockets
21767 operating system is allowing to use simultaneously. Resolves
21770 o Removed features:
21771 - We no longer remind the user about configuration options that have
21772 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
21773 - Remove our old, non-weighted bandwidth-based node selection code.
21774 Previously, we used it as a fallback when we couldn't perform
21775 weighted bandwidth-based node selection. But that would only
21776 happen in the cases where we had no consensus, or when we had a
21777 consensus generated by buggy or ancient directory authorities. In
21778 either case, it's better to use the more modern, better maintained
21779 algorithm, with reasonable defaults for the weights. Closes
21781 - Remove the --disable-curve25519 configure option. Relays and
21782 clients now are required to support curve25519 and the
21784 - The old "StrictEntryNodes" and "StrictExitNodes" options, which
21785 used to be deprecated synonyms for "StrictNodes", are now marked
21786 obsolete. Resolves ticket 12226.
21787 - Clients don't understand the BadDirectory flag in the consensus
21788 anymore, and ignore it.
21791 - Refactor the function that chooses guard nodes so that it can more
21792 easily be tested; write some tests for it.
21793 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
21794 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
21795 - Create unit tests for format_time_interval(). With bug 13393.
21796 - Add unit tests for tor_timegm signed overflow, tor_timegm and
21797 parse_rfc1123_time validity checks, correct_tm year clamping. Unit
21798 tests (visible) fixes in bug 13476.
21799 - Add a "coverage-html" make target to generate HTML-visualized
21800 coverage results when building with --enable-coverage. (Requires
21801 lcov.) Patch from Kevin Murray.
21802 - Enable the backtrace handler (where supported) when running the
21804 - Revise all unit tests that used the legacy test_* macros to
21805 instead use the recommended tt_* macros. This patch was generated
21806 with coccinelle, to avoid manual errors. Closes ticket 13119.
21808 o Distribution (systemd):
21809 - systemd unit file: only allow tor to write to /var/lib/tor and
21810 /var/log/tor. The rest of the filesystem is accessible for reading
21811 only. Patch by intrigeri; resolves ticket 12751.
21812 - systemd unit file: ensure that the process and all its children
21813 can never gain new privileges. Patch by intrigeri; resolves
21815 - systemd unit file: set up /var/run/tor as writable for the Tor
21816 service. Patch by intrigeri; resolves ticket 13196.
21818 o Removed features (directory authorities):
21819 - Remove code that prevented authorities from listing Tor relays
21820 affected by CVE-2011-2769 as guards. These relays are already
21821 rejected altogether due to the minimum version requirement of
21822 0.2.3.16-alpha. Closes ticket 13152.
21823 - The "AuthDirRejectUnlisted" option no longer has any effect, as
21824 the fingerprints file (approved-routers) has been deprecated.
21825 - Directory authorities do not support being Naming dirauths anymore.
21826 The "NamingAuthoritativeDir" config option is now obsolete.
21827 - Directory authorities do not support giving out the BadDirectory
21829 - Directory authorities no longer advertise or support consensus
21830 methods 1 through 12 inclusive. These consensus methods were
21831 obsolete and/or insecure: maintaining the ability to support them
21832 served no good purpose. Implements part of proposal 215; closes
21835 o Testing (test-network.sh):
21836 - Stop using "echo -n", as some shells' built-in echo doesn't
21837 support "-n". Instead, use "/bin/echo -n". Partially fixes
21839 - Stop an apparent test-network hang when used with make -j2. Fixes
21841 - Add a --delay option to test-network.sh, which configures the
21842 delay before the chutney network tests for data transmission.
21843 Partially implements ticket 13161.
21846 Changes in version 0.2.5.10 - 2014-10-24
21847 Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
21849 It adds several new security features, including improved
21850 denial-of-service resistance for relays, new compiler hardening
21851 options, and a system-call sandbox for hardened installations on Linux
21852 (requires seccomp2). The controller protocol has several new features,
21853 resolving IPv6 addresses should work better than before, and relays
21854 should be a little more CPU-efficient. We've added support for more
21855 OpenBSD and FreeBSD transparent proxy types. We've improved the build
21856 system and testing infrastructure to allow unit testing of more parts
21857 of the Tor codebase. Finally, we've addressed several nagging pluggable
21858 transport usability issues, and included numerous other small bugfixes
21859 and features mentioned below.
21861 This release marks end-of-life for Tor 0.2.3.x; those Tor versions
21862 have accumulated many known flaws; everyone should upgrade.
21864 o Deprecated versions:
21865 - Tor 0.2.3.x has reached end-of-life; it has received no patches or
21866 attention for some while.
21869 Changes in version 0.2.5.9-rc - 2014-10-20
21870 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
21871 series. It disables SSL3 in response to the recent "POODLE" attack
21872 (even though POODLE does not affect Tor). It also works around a crash
21873 bug caused by some operating systems' response to the "POODLE" attack
21874 (which does affect Tor). It also contains a few miscellaneous fixes.
21876 o Major security fixes:
21877 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
21878 today support TLS 1.0 or later, so we can safely turn off support
21879 for this old (and insecure) protocol. Fixes bug 13426.
21881 o Major bugfixes (openssl bug workaround):
21882 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
21883 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
21884 13471. This is a workaround for an OpenSSL bug.
21887 - Disable the sandbox name resolver cache when running tor-resolve:
21888 tor-resolve doesn't use the sandbox code, and turning it on was
21889 breaking attempts to do tor-resolve on a non-default server on
21890 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
21892 o Compilation fixes:
21893 - Build and run correctly on systems like OpenBSD-current that have
21894 patched OpenSSL to remove get_cipher_by_char and/or its
21895 implementations. Fixes issue 13325.
21897 o Downgraded warnings:
21898 - Downgrade the severity of the 'unexpected sendme cell from client'
21899 from 'warn' to 'protocol warning'. Closes ticket 8093.
21902 Changes in version 0.2.4.25 - 2014-10-20
21903 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
21904 (even though POODLE does not affect Tor). It also works around a crash
21905 bug caused by some operating systems' response to the "POODLE" attack
21906 (which does affect Tor).
21908 o Major security fixes (also in 0.2.5.9-rc):
21909 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
21910 today support TLS 1.0 or later, so we can safely turn off support
21911 for this old (and insecure) protocol. Fixes bug 13426.
21913 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
21914 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
21915 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
21916 13471. This is a workaround for an OpenSSL bug.
21919 Changes in version 0.2.5.8-rc - 2014-09-22
21920 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
21921 series. It fixes a bug that affects consistency and speed when
21922 connecting to hidden services, and it updates the location of one of
21923 the directory authorities.
21926 - Clients now send the correct address for their chosen rendezvous
21927 point when trying to access a hidden service. They used to send
21928 the wrong address, which would still work some of the time because
21929 they also sent the identity digest of the rendezvous point, and if
21930 the hidden service happened to try connecting to the rendezvous
21931 point from a relay that already had a connection open to it,
21932 the relay would reuse that connection. Now connections to hidden
21933 services should be more robust and faster. Also, this bug meant
21934 that clients were leaking to the hidden service whether they were
21935 on a little-endian (common) or big-endian (rare) system, which for
21936 some users might have reduced their anonymity. Fixes bug 13151;
21937 bugfix on 0.2.1.5-alpha.
21939 o Directory authority changes:
21940 - Change IP address for gabelmoo (v3 directory authority).
21943 Changes in version 0.2.4.24 - 2014-09-22
21944 Tor 0.2.4.24 fixes a bug that affects consistency and speed when
21945 connecting to hidden services, and it updates the location of one of
21946 the directory authorities.
21949 - Clients now send the correct address for their chosen rendezvous
21950 point when trying to access a hidden service. They used to send
21951 the wrong address, which would still work some of the time because
21952 they also sent the identity digest of the rendezvous point, and if
21953 the hidden service happened to try connecting to the rendezvous
21954 point from a relay that already had a connection open to it,
21955 the relay would reuse that connection. Now connections to hidden
21956 services should be more robust and faster. Also, this bug meant
21957 that clients were leaking to the hidden service whether they were
21958 on a little-endian (common) or big-endian (rare) system, which for
21959 some users might have reduced their anonymity. Fixes bug 13151;
21960 bugfix on 0.2.1.5-alpha.
21962 o Directory authority changes:
21963 - Change IP address for gabelmoo (v3 directory authority).
21965 o Minor features (geoip):
21966 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
21970 Changes in version 0.2.5.7-rc - 2014-09-11
21971 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
21972 release series, and some long-standing bugs related to ORPort reachability
21973 testing and failure to send CREATE cells. It is the first release
21974 candidate for the Tor 0.2.5.x series.
21976 o Major bugfixes (client, startup):
21977 - Start making circuits as soon as DisabledNetwork is turned off.
21978 When Tor started with DisabledNetwork set, it would correctly
21979 conclude that it shouldn't build circuits, but it would mistakenly
21980 cache this conclusion, and continue believing it even when
21981 DisableNetwork is set to 0. Fixes the bug introduced by the fix
21982 for bug 11200; bugfix on 0.2.5.4-alpha.
21983 - Resume expanding abbreviations for command-line options. The fix
21984 for bug 4647 accidentally removed our hack from bug 586 that
21985 rewrote HashedControlPassword to __HashedControlSessionPassword
21986 when it appears on the commandline (which allowed the user to set
21987 her own HashedControlPassword in the torrc file while the
21988 controller generates a fresh session password for each run). Fixes
21989 bug 12948; bugfix on 0.2.5.1-alpha.
21990 - Warn about attempts to run hidden services and relays in the same
21991 process: that's probably not a good idea. Closes ticket 12908.
21993 o Major bugfixes (relay):
21994 - Avoid queuing or sending destroy cells for circuit ID zero when we
21995 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
21996 Found and fixed by "cypherpunks".
21997 - Fix ORPort reachability detection on relays running behind a
21998 proxy, by correctly updating the "local" mark on the controlling
21999 channel when changing the address of an or_connection_t after the
22000 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
22002 o Minor features (bridge):
22003 - Add an ExtORPortCookieAuthFileGroupReadable option to make the
22004 cookie file for the ExtORPort g+r by default.
22006 o Minor features (geoip):
22007 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
22010 o Minor bugfixes (logging):
22011 - Reduce the log severity of the "Pluggable transport proxy does not
22012 provide any needed transports and will not be launched." message,
22013 since Tor Browser includes several ClientTransportPlugin lines in
22014 its torrc-defaults file, leading every Tor Browser user who looks
22015 at her logs to see these notices and wonder if they're dangerous.
22016 Resolves bug 13124; bugfix on 0.2.5.3-alpha.
22017 - Downgrade "Unexpected onionskin length after decryption" warning
22018 to a protocol-warn, since there's nothing relay operators can do
22019 about a client that sends them a malformed create cell. Resolves
22020 bug 12996; bugfix on 0.0.6rc1.
22021 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
22022 cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
22023 - When logging information about an EXTEND2 or EXTENDED2 cell, log
22024 their names correctly. Fixes part of bug 12700; bugfix
22026 - When logging information about a relay cell whose command we don't
22027 recognize, log its command as an integer. Fixes part of bug 12700;
22028 bugfix on 0.2.1.10-alpha.
22029 - Escape all strings from the directory connection before logging
22030 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
22032 o Minor bugfixes (controller):
22033 - Restore the functionality of CookieAuthFileGroupReadable. Fixes
22034 bug 12864; bugfix on 0.2.5.1-alpha.
22035 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
22036 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
22039 o Minor bugfixes (compilation):
22040 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
22041 bugfix on 0.2.5.5-alpha.
22042 - Make the nmake make files work again. Fixes bug 13081. Bugfix on
22043 0.2.5.1-alpha. Patch from "NewEraCracker".
22044 - In routerlist_assert_ok(), don't take the address of a
22045 routerinfo's cache_info member unless that routerinfo is non-NULL.
22046 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
22047 - Fix a large number of false positive warnings from the clang
22048 analyzer static analysis tool. This should make real warnings
22049 easier for clang analyzer to find. Patch from "teor". Closes
22052 o Distribution (systemd):
22053 - Verify configuration file via ExecStartPre in the systemd unit
22054 file. Patch from intrigeri; resolves ticket 12730.
22055 - Explicitly disable RunAsDaemon in the systemd unit file. Our
22056 current systemd unit uses "Type = simple", so systemd does not
22057 expect tor to fork. If the user has "RunAsDaemon 1" in their
22058 torrc, then things won't work as expected. This is e.g. the case
22059 on Debian (and derivatives), since there we pass "--defaults-torrc
22060 /usr/share/tor/tor-service-defaults-torrc" (that contains
22061 "RunAsDaemon 1") by default. Patch by intrigeri; resolves
22065 - Adjust the URLs in the README to refer to the new locations of
22066 several documents on the website. Fixes bug 12830. Patch from
22068 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
22072 Changes in version 0.2.5.6-alpha - 2014-07-28
22073 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
22074 risk from guard rotation, and fixes a variety of other issues to get
22075 us closer to a release candidate.
22077 o Major features (also in 0.2.4.23):
22078 - Make the number of entry guards configurable via a new
22079 NumEntryGuards consensus parameter, and the number of directory
22080 guards configurable via a new NumDirectoryGuards consensus
22081 parameter. Implements ticket 12688.
22083 o Major bugfixes (also in 0.2.4.23):
22084 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
22085 implementation that caused incorrect results on 32-bit
22086 implementations when certain malformed inputs were used along with
22087 a small class of private ntor keys. This bug does not currently
22088 appear to allow an attacker to learn private keys or impersonate a
22089 Tor server, but it could provide a means to distinguish 32-bit Tor
22090 implementations from 64-bit Tor implementations. Fixes bug 12694;
22091 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
22095 - Perform circuit cleanup operations even when circuit
22096 construction operations are disabled (because the network is
22097 disabled, or because there isn't enough directory information).
22098 Previously, when we were not building predictive circuits, we
22099 were not closing expired circuits either. Fixes bug 8387; bugfix on
22100 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
22101 became more strict about when we have "enough directory information
22102 to build circuits".
22105 - Authorities now assign the Guard flag to the fastest 25% of the
22106 network (it used to be the fastest 50%). Also raise the consensus
22107 weight that guarantees the Guard flag from 250 to 2000. For the
22108 current network, this results in about 1100 guards, down from 2500.
22109 This step paves the way for moving the number of entry guards
22110 down to 1 (proposal 236) while still providing reasonable expected
22111 performance for most users. Implements ticket 12690.
22112 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
22114 - Slightly enhance the diagnostic message for bug 12184.
22116 o Minor bugfixes (also in 0.2.4.23):
22117 - Warn and drop the circuit if we receive an inbound 'relay early'
22118 cell. Those used to be normal to receive on hidden service circuits
22119 due to bug 1038, but the buggy Tor versions are long gone from
22120 the network so we can afford to resume watching for them. Resolves
22121 the rest of bug 1038; bugfix on 0.2.1.19.
22122 - Correct a confusing error message when trying to extend a circuit
22123 via the control protocol but we don't know a descriptor or
22124 microdescriptor for one of the specified relays. Fixes bug 12718;
22125 bugfix on 0.2.3.1-alpha.
22128 - Fix compilation when building with bufferevents enabled. (This
22129 configuration is still not expected to work, however.)
22130 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
22131 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
22133 - Compile correctly with builds and forks of OpenSSL (such as
22134 LibreSSL) that disable compression. Fixes bug 12602; bugfix on
22135 0.2.1.1-alpha. Patch from "dhill".
22138 Changes in version 0.2.4.23 - 2014-07-28
22139 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
22140 guard rotation, and also backports several important fixes from the
22141 Tor 0.2.5 alpha release series.
22144 - Clients now look at the "usecreatefast" consensus parameter to
22145 decide whether to use CREATE_FAST or CREATE cells for the first hop
22146 of their circuit. This approach can improve security on connections
22147 where Tor's circuit handshake is stronger than the available TLS
22148 connection security levels, but the tradeoff is more computational
22149 load on guard relays. Implements proposal 221. Resolves ticket 9386.
22150 - Make the number of entry guards configurable via a new
22151 NumEntryGuards consensus parameter, and the number of directory
22152 guards configurable via a new NumDirectoryGuards consensus
22153 parameter. Implements ticket 12688.
22156 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
22157 implementation that caused incorrect results on 32-bit
22158 implementations when certain malformed inputs were used along with
22159 a small class of private ntor keys. This bug does not currently
22160 appear to allow an attacker to learn private keys or impersonate a
22161 Tor server, but it could provide a means to distinguish 32-bit Tor
22162 implementations from 64-bit Tor implementations. Fixes bug 12694;
22163 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
22167 - Warn and drop the circuit if we receive an inbound 'relay early'
22168 cell. Those used to be normal to receive on hidden service circuits
22169 due to bug 1038, but the buggy Tor versions are long gone from
22170 the network so we can afford to resume watching for them. Resolves
22171 the rest of bug 1038; bugfix on 0.2.1.19.
22172 - Correct a confusing error message when trying to extend a circuit
22173 via the control protocol but we don't know a descriptor or
22174 microdescriptor for one of the specified relays. Fixes bug 12718;
22175 bugfix on 0.2.3.1-alpha.
22176 - Avoid an illegal read from stack when initializing the TLS
22177 module using a version of OpenSSL without all of the ciphers
22178 used by the v2 link handshake. Fixes bug 12227; bugfix on
22179 0.2.4.8-alpha. Found by "starlight".
22182 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
22186 Changes in version 0.2.5.5-alpha - 2014-06-18
22187 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
22188 0.2.5.x release series, including a couple of DoS issues, some
22189 performance regressions, a large number of bugs affecting the Linux
22190 seccomp2 sandbox code, and various other bugfixes. It also adds
22191 diagnostic bugfixes for a few tricky issues that we're trying to
22194 o Major features (security, traffic analysis resistance):
22195 - Several major improvements to the algorithm used to decide when to
22196 close TLS connections. Previous versions of Tor closed connections
22197 at a fixed interval after the last time a non-padding cell was
22198 sent over the connection, regardless of the target of the
22199 connection. Now, we randomize the intervals by adding up to 50% of
22200 their base value, we measure the length of time since connection
22201 last had at least one circuit, and we allow connections to known
22202 ORs to remain open a little longer (15 minutes instead of 3
22203 minutes minimum). These changes should improve Tor's resistance
22204 against some kinds of traffic analysis, and lower some overhead
22205 from needlessly closed connections. Fixes ticket 6799.
22206 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
22208 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
22209 - Fix a memory leak that could occur if a microdescriptor parse
22210 fails during the tokenizing step. This bug could enable a memory
22211 exhaustion attack by directory servers. Fixes bug 11649; bugfix
22214 o Major bugfixes (security, directory authorities):
22215 - Directory authorities now include a digest of each relay's
22216 identity key as a part of its microdescriptor.
22218 This is a workaround for bug 11743 (reported by "cypherpunks"),
22219 where Tor clients do not support receiving multiple
22220 microdescriptors with the same SHA256 digest in the same
22221 consensus. When clients receive a consensus like this, they only
22222 use one of the relays. Without this fix, a hostile relay could
22223 selectively disable some client use of target relays by
22224 constructing a router descriptor with a different identity and the
22225 same microdescriptor parameters and getting the authorities to
22226 list it in a microdescriptor consensus. This fix prevents an
22227 attacker from causing a microdescriptor collision, because the
22228 router's identity is not forgeable.
22230 o Major bugfixes (relay):
22231 - Use a direct dirport connection when uploading non-anonymous
22232 descriptors to the directory authorities. Previously, relays would
22233 incorrectly use tunnel connections under a fairly wide variety of
22234 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
22235 - When a circuit accidentally has the same circuit ID for its
22236 forward and reverse direction, correctly detect the direction of
22237 cells using that circuit. Previously, this bug made roughly one
22238 circuit in a million non-functional. Fixes bug 12195; this is a
22239 bugfix on every version of Tor.
22241 o Major bugfixes (client, pluggable transports):
22242 - When managing pluggable transports, use OS notification facilities
22243 to learn if they have crashed, and don't attempt to kill any
22244 process that has already exited. Fixes bug 8746; bugfix
22247 o Minor features (diagnostic):
22248 - When logging a warning because of bug 7164, additionally check the
22249 hash table for consistency (as proposed on ticket 11737). This may
22250 help diagnose bug 7164.
22251 - When we log a heartbeat, log how many one-hop circuits we have
22252 that are at least 30 minutes old, and log status information about
22253 a few of them. This is an attempt to track down bug 8387.
22254 - When encountering an unexpected CR while writing text to a file on
22255 Windows, log the name of the file. Should help diagnosing
22257 - Give more specific warnings when a client notices that an onion
22258 handshake has failed. Fixes ticket 9635.
22259 - Add significant new logging code to attempt to diagnose bug 12184,
22260 where relays seem to run out of available circuit IDs.
22261 - Improve the diagnostic log message for bug 8387 even further to
22262 try to improve our odds of figuring out why one-hop directory
22263 circuits sometimes do not get closed.
22265 o Minor features (security, memory management):
22266 - Memory allocation tricks (mempools and buffer freelists) are now
22267 disabled by default. You can turn them back on with
22268 --enable-mempools and --enable-buf-freelists respectively. We're
22269 disabling these features because malloc performance is good enough
22270 on most platforms, and a similar feature in OpenSSL exacerbated
22271 exploitation of the Heartbleed attack. Resolves ticket 11476.
22273 o Minor features (security):
22274 - Apply the secure SipHash-2-4 function to the hash table mapping
22275 circuit IDs and channels to circuits. We missed this one when we
22276 were converting all the other hash functions to use SipHash back
22277 in 0.2.5.3-alpha. Resolves ticket 11750.
22279 o Minor features (build):
22280 - The configure script has a --disable-seccomp option to turn off
22281 support for libseccomp on systems that have it, in case it (or
22282 Tor's use of it) is broken. Resolves ticket 11628.
22284 o Minor features (other):
22285 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
22288 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
22289 - When running a hidden service, do not allow TunneledDirConns 0;
22290 this will keep the hidden service from running, and also
22291 make it publish its descriptors directly over HTTP. Fixes bug 10849;
22292 bugfix on 0.2.1.1-alpha.
22294 o Minor bugfixes (performance):
22295 - Avoid a bug where every successful connection made us recompute
22296 the flag telling us whether we have sufficient information to
22297 build circuits. Previously, we would forget our cached value
22298 whenever we successfully opened a channel (or marked a router as
22299 running or not running for any other reason), regardless of
22300 whether we had previously believed the router to be running. This
22301 forced us to run an expensive update operation far too often.
22302 Fixes bug 12170; bugfix on 0.1.2.1-alpha.
22303 - Avoid using tor_memeq() for checking relay cell integrity. This
22304 removes a possible performance bottleneck. Fixes part of bug
22305 12169; bugfix on 0.2.1.31.
22307 o Minor bugfixes (compilation):
22308 - Fix compilation of test_status.c when building with MVSC. Bugfix
22309 on 0.2.5.4-alpha. Patch from Gisle Vanem.
22310 - Resolve GCC complaints on OpenBSD about discarding constness in
22311 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
22312 on 0.1.1.23. Patch from Dana Koch.
22313 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
22314 treatment of long and time_t as comparable types. Fixes part of
22315 bug 11633. Patch from Dana Koch.
22316 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
22317 11623; bugfix on 0.2.5.3-alpha.
22318 - When deciding whether to build the 64-bit curve25519
22319 implementation, detect platforms where we can compile 128-bit
22320 arithmetic but cannot link it. Fixes bug 11729; bugfix on
22321 0.2.4.8-alpha. Patch from "conradev".
22322 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
22323 bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
22324 - Fix compilation with dmalloc. Fixes bug 11605; bugfix
22327 o Minor bugfixes (Directory server):
22328 - When sending a compressed set of descriptors or microdescriptors,
22329 make sure to finalize the zlib stream. Previously, we would write
22330 all the compressed data, but if the last descriptor we wanted to
22331 send was missing or too old, we would not mark the stream as
22332 finished. This caused problems for decompression tools. Fixes bug
22333 11648; bugfix on 0.1.1.23.
22335 o Minor bugfixes (Linux seccomp sandbox):
22336 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
22337 11622; bugfix on 0.2.5.1-alpha.
22338 - Avoid crashing when re-opening listener ports with the seccomp
22339 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
22340 - Avoid crashing with the seccomp sandbox enabled along with
22341 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
22342 - When we receive a SIGHUP with the sandbox enabled, correctly
22343 support rotating our log files. Fixes bug 12032; bugfix
22345 - Avoid crash when running with sandboxing enabled and
22346 DirReqStatistics not disabled. Fixes bug 12035; bugfix
22348 - Fix a "BUG" warning when trying to write bridge-stats files with
22349 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
22351 - Prevent the sandbox from crashing on startup when run with the
22352 --enable-expensive-hardening configuration option. Fixes bug
22353 11477; bugfix on 0.2.5.4-alpha.
22354 - When running with DirPortFrontPage and sandboxing both enabled,
22355 reload the DirPortFrontPage correctly when restarting. Fixes bug
22356 12028; bugfix on 0.2.5.1-alpha.
22357 - Don't try to enable the sandbox when using the Tor binary to check
22358 its configuration, hash a passphrase, or so on. Doing so was
22359 crashing on startup for some users. Fixes bug 11609; bugfix
22361 - Avoid warnings when running with sandboxing and node statistics
22362 enabled at the same time. Fixes part of 12064; bugfix on
22363 0.2.5.1-alpha. Patch from Michael Wolf.
22364 - Avoid warnings when running with sandboxing enabled at the same
22365 time as cookie authentication, hidden services, or directory
22366 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
22367 - Do not allow options that require calls to exec to be enabled
22368 alongside the seccomp2 sandbox: they will inevitably crash. Fixes
22369 bug 12043; bugfix on 0.2.5.1-alpha.
22370 - Handle failures in getpwnam()/getpwuid() when running with the
22371 User option set and the Linux syscall sandbox enabled. Fixes bug
22372 11946; bugfix on 0.2.5.1-alpha.
22373 - Refactor the getaddrinfo workaround that the seccomp sandbox uses
22374 to avoid calling getaddrinfo() after installing the sandbox
22375 filters. Previously, it preloaded a cache with the IPv4 address
22376 for our hostname, and nothing else. Now, it loads the cache with
22377 every address that it used to initialize the Tor process. Fixes
22378 bug 11970; bugfix on 0.2.5.1-alpha.
22380 o Minor bugfixes (pluggable transports):
22381 - Enable the ExtORPortCookieAuthFile option, to allow changing the
22382 default location of the authentication token for the extended OR
22383 Port as used by sever-side pluggable transports. We had
22384 implemented this option before, but the code to make it settable
22385 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
22386 - Avoid another 60-second delay when starting Tor in a pluggable-
22387 transport-using configuration when we already have cached
22388 descriptors for our bridges. Fixes bug 11965; bugfix
22391 o Minor bugfixes (client):
22392 - Avoid "Tried to open a socket with DisableNetwork set" warnings
22393 when starting a client with bridges configured and DisableNetwork
22394 set. (Tor launcher starts Tor with DisableNetwork set the first
22395 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
22397 o Minor bugfixes (testing):
22398 - The Python parts of the test scripts now work on Python 3 as well
22399 as Python 2, so systems where '/usr/bin/python' is Python 3 will
22400 no longer have the tests break. Fixes bug 11608; bugfix
22402 - When looking for versions of python that we could run the tests
22403 with, check for "python2.7" and "python3.3"; previously we were
22404 only looking for "python", "python2", and "python3". Patch from
22405 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
22406 - Fix all valgrind warnings produced by the unit tests. There were
22407 over a thousand memory leak warnings previously, mostly produced
22408 by forgetting to free things in the unit test code. Fixes bug
22409 11618, bugfixes on many versions of Tor.
22411 o Minor bugfixes (tor-fw-helper):
22412 - Give a correct log message when tor-fw-helper fails to launch.
22413 (Previously, we would say something like "tor-fw-helper sent us a
22414 string we could not parse".) Fixes bug 9781; bugfix
22417 o Minor bugfixes (relay, threading):
22418 - Check return code on spawn_func() in cpuworker code, so that we
22419 don't think we've spawned a nonworking cpuworker and write junk to
22420 it forever. Fix related to bug 4345; bugfix on all released Tor
22421 versions. Found by "skruffy".
22422 - Use a pthread_attr to make sure that spawn_func() cannot return an
22423 error while at the same time launching a thread. Fix related to
22424 bug 4345; bugfix on all released Tor versions. Reported
22427 o Minor bugfixes (relay, oom prevention):
22428 - Correctly detect the total available system memory. We tried to do
22429 this in 0.2.5.4-alpha, but the code was set up to always return an
22430 error value, even on success. Fixes bug 11805; bugfix
22433 o Minor bugfixes (relay, other):
22434 - We now drop CREATE cells for already-existent circuit IDs and for
22435 zero-valued circuit IDs, regardless of other factors that might
22436 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
22438 - Avoid an illegal read from stack when initializing the TLS module
22439 using a version of OpenSSL without all of the ciphers used by the
22440 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
22442 - When rejecting DATA cells for stream_id zero, still count them
22443 against the circuit's deliver window so that we don't fail to send
22444 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
22446 o Minor bugfixes (logging):
22447 - Fix a misformatted log message about delayed directory fetches.
22448 Fixes bug 11654; bugfix on 0.2.5.3-alpha.
22449 - Squelch a spurious LD_BUG message "No origin circuit for
22450 successful SOCKS stream" in certain hidden service failure cases;
22454 - Include a tor.service file in contrib/dist for use with systemd.
22455 Some distributions will be able to use this file unmodified;
22456 others will need to tweak it, or write their own. Patch from Jamie
22457 Nguyen; resolves ticket 8368.
22460 - Clean up several option names in the manpage to match their real
22461 names, add the missing documentation for a couple of testing and
22462 directory authority options, remove the documentation for a
22463 V2-directory fetching option that no longer exists. Resolves
22465 - Correct the documentation so that it lists the correct directory
22466 for the stats files. (They are in a subdirectory called "stats",
22468 - In the manpage, move more authority-only options into the
22469 directory authority section so that operators of regular directory
22470 caches don't get confused.
22473 - The contrib directory has been sorted and tidied. Before, it was
22474 an unsorted dumping ground for useful and not-so-useful things.
22475 Now, it is divided based on functionality, and the items which
22476 seemed to be nonfunctional or useless have been removed. Resolves
22477 ticket 8966; based on patches from "rl1987".
22480 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
22481 and MTBF calculations, but that nobody was using. Fixes ticket 11742.
22482 - The TunnelDirConns and PreferTunnelledDirConns options no longer
22483 exist; tunneled directory connections have been available since
22484 0.1.2.5-alpha, and turning them off is not a good idea. This is a
22485 brute-force fix for 10849, where "TunnelDirConns 0" would break
22489 Changes in version 0.2.4.22 - 2014-05-16
22490 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
22491 alpha release series. These include blocking all authority signing
22492 keys that may have been affected by the OpenSSL "heartbleed" bug,
22493 choosing a far more secure set of TLS ciphersuites by default, closing
22494 a couple of memory leaks that could be used to run a target relay out
22495 of RAM, and several others.
22497 o Major features (security, backport from 0.2.5.4-alpha):
22498 - Block authority signing keys that were used on authorities
22499 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
22500 don't have any evidence that these keys _were_ compromised; we're
22501 doing this to be prudent.) Resolves ticket 11464.
22503 o Major bugfixes (security, OOM):
22504 - Fix a memory leak that could occur if a microdescriptor parse
22505 fails during the tokenizing step. This bug could enable a memory
22506 exhaustion attack by directory servers. Fixes bug 11649; bugfix
22509 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
22510 - The relay ciphersuite list is now generated automatically based on
22511 uniform criteria, and includes all OpenSSL ciphersuites with
22512 acceptable strength and forward secrecy. Previously, we had left
22513 some perfectly fine ciphersuites unsupported due to omission or
22514 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
22515 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
22516 - Relays now trust themselves to have a better view than clients of
22517 which TLS ciphersuites are better than others. (Thanks to bug
22518 11513, the relay list is now well-considered, whereas the client
22519 list has been chosen mainly for anti-fingerprinting purposes.)
22520 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
22521 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
22522 AES128. Resolves ticket 11528.
22523 - Clients now try to advertise the same list of ciphersuites as
22524 Firefox 28. This change enables selection of (fast) GCM
22525 ciphersuites, disables some strange old ciphers, and stops
22526 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
22527 Resolves ticket 11438.
22529 o Minor bugfixes (configuration, security):
22530 - When running a hidden service, do not allow TunneledDirConns 0:
22531 trying to set that option together with a hidden service would
22532 otherwise prevent the hidden service from running, and also make
22533 it publish its descriptors directly over HTTP. Fixes bug 10849;
22534 bugfix on 0.2.1.1-alpha.
22536 o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
22537 - Avoid sending a garbage value to the controller when a circuit is
22538 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
22540 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
22541 - Stop leaking memory when we successfully resolve a PTR record.
22542 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
22544 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
22545 - Avoid 60-second delays in the bootstrapping process when Tor is
22546 launching for a second time while using bridges. Fixes bug 9229;
22547 bugfix on 0.2.0.3-alpha.
22549 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
22550 - Give the correct URL in the warning message when trying to run a
22551 relay on an ancient version of Windows. Fixes bug 9393.
22553 o Minor bugfixes (compilation):
22554 - Fix a compilation error when compiling with --disable-curve25519.
22555 Fixes bug 9700; bugfix on 0.2.4.17-rc.
22558 - Downgrade the warning severity for the the "md was still
22559 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
22560 for trying to diagnose this bug, and the current warning in
22561 earlier versions of tor achieves nothing useful. Addresses warning
22564 o Minor features (log verbosity, backport from 0.2.5.4-alpha):
22565 - When we run out of usable circuit IDs on a channel, log only one
22566 warning for the whole channel, and describe how many circuits
22567 there were on the channel. Fixes part of ticket 11553.
22569 o Minor features (security, backport from 0.2.5.4-alpha):
22570 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
22571 leave the default at 8GBytes), to better support Raspberry Pi
22572 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
22574 o Documentation (backport from 0.2.5.4-alpha):
22575 - Correctly document that we search for a system torrc file before
22576 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
22580 Changes in version 0.2.5.4-alpha - 2014-04-25
22581 Tor 0.2.5.4-alpha includes several security and performance
22582 improvements for clients and relays, including blacklisting authority
22583 signing keys that were used while susceptible to the OpenSSL
22584 "heartbleed" bug, fixing two expensive functions on busy relays,
22585 improved TLS ciphersuite preference lists, support for run-time
22586 hardening on compilers that support AddressSanitizer, and more work on
22587 the Linux sandbox code.
22589 There are also several usability fixes for clients (especially clients
22590 that use bridges), two new TransPort protocols supported (one on
22591 OpenBSD, one on FreeBSD), and various other bugfixes.
22593 This release marks end-of-life for Tor 0.2.2.x; those Tor versions
22594 have accumulated many known flaws; everyone should upgrade.
22596 o Major features (security):
22597 - If you don't specify MaxMemInQueues yourself, Tor now tries to
22598 pick a good value based on your total system memory. Previously,
22599 the default was always 8 GB. You can still override the default by
22600 setting MaxMemInQueues yourself. Resolves ticket 11396.
22601 - Block authority signing keys that were used on authorities
22602 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
22603 don't have any evidence that these keys _were_ compromised; we're
22604 doing this to be prudent.) Resolves ticket 11464.
22606 o Major features (relay performance):
22607 - Speed up server-side lookups of rendezvous and introduction point
22608 circuits by using hashtables instead of linear searches. These
22609 functions previously accounted between 3 and 7% of CPU usage on
22610 some busy relays. Resolves ticket 9841.
22611 - Avoid wasting CPU when extending a circuit over a channel that is
22612 nearly out of circuit IDs. Previously, we would do a linear scan
22613 over possible circuit IDs before finding one or deciding that we
22614 had exhausted our possibilities. Now, we try at most 64 random
22615 circuit IDs before deciding that we probably won't succeed. Fixes
22616 a possible root cause of ticket 11553.
22618 o Major features (seccomp2 sandbox, Linux only):
22619 - The seccomp2 sandbox can now run a test network for multiple hours
22620 without crashing. The sandbox is still experimental, and more bugs
22621 will probably turn up. To try it, enable "Sandbox 1" on a Linux
22622 host. Resolves ticket 11351.
22623 - Strengthen sandbox code: the sandbox can now test the arguments
22624 for rename(), and blocks _sysctl() entirely. Resolves another part
22626 - When the sandbox blocks a system call, it now tries to log a stack
22627 trace before exiting. Resolves ticket 11465.
22629 o Major bugfixes (TLS cipher selection):
22630 - The relay ciphersuite list is now generated automatically based on
22631 uniform criteria, and includes all OpenSSL ciphersuites with
22632 acceptable strength and forward secrecy. Previously, we had left
22633 some perfectly fine ciphersuites unsupported due to omission or
22634 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
22635 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
22636 - Relays now trust themselves to have a better view than clients of
22637 which TLS ciphersuites are better than others. (Thanks to bug
22638 11513, the relay list is now well-considered, whereas the client
22639 list has been chosen mainly for anti-fingerprinting purposes.)
22640 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
22641 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
22642 AES128. Resolves ticket 11528.
22643 - Clients now try to advertise the same list of ciphersuites as
22644 Firefox 28. This change enables selection of (fast) GCM
22645 ciphersuites, disables some strange old ciphers, and stops
22646 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
22647 Resolves ticket 11438.
22649 o Major bugfixes (bridge client):
22650 - Avoid 60-second delays in the bootstrapping process when Tor is
22651 launching for a second time while using bridges. Fixes bug 9229;
22652 bugfix on 0.2.0.3-alpha.
22654 o Minor features (transparent proxy, *BSD):
22655 - Support FreeBSD's ipfw firewall interface for TransPort ports on
22656 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
22657 10267; patch from "yurivict".
22658 - Support OpenBSD's divert-to rules with the pf firewall for
22659 transparent proxy ports. To enable it, set "TransProxyType
22660 pf-divert". This allows Tor to run a TransPort transparent proxy
22661 port on OpenBSD 4.4 or later without root privileges. See the
22662 pf.conf(5) manual page for information on configuring pf to use
22663 divert-to rules. Closes ticket 10896; patch from Dana Koch.
22665 o Minor features (security):
22666 - New --enable-expensive-hardening option to enable security
22667 hardening options that consume nontrivial amounts of CPU and
22668 memory. Right now, this includes AddressSanitizer and UbSan, which
22669 are supported in newer versions of GCC and Clang. Closes ticket
22672 o Minor features (log verbosity):
22673 - Demote the message that we give when a flushing connection times
22674 out for too long from NOTICE to INFO. It was usually meaningless.
22675 Resolves ticket 5286.
22676 - Don't log so many notice-level bootstrapping messages at startup
22677 about downloading descriptors. Previously, we'd log a notice
22678 whenever we learned about more routers. Now, we only log a notice
22679 at every 5% of progress. Fixes bug 9963.
22680 - Warn less verbosely when receiving a malformed
22681 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
22682 - When we run out of usable circuit IDs on a channel, log only one
22683 warning for the whole channel, and describe how many circuits
22684 there were on the channel. Fixes part of ticket 11553.
22686 o Minor features (relay):
22687 - If a circuit timed out for at least 3 minutes, check if we have a
22688 new external IP address, and publish a new descriptor with the new
22689 IP address if it changed. Resolves ticket 2454.
22691 o Minor features (controller):
22692 - Make the entire exit policy available from the control port via
22693 GETINFO exit-policy/*. Implements enhancement 7952. Patch from
22695 - Because of the fix for ticket 11396, the real limit for memory
22696 usage may no longer match the configured MaxMemInQueues value. The
22697 real limit is now exposed via GETINFO limits/max-mem-in-queues.
22699 o Minor features (bridge client):
22700 - Report a more useful failure message when we can't connect to a
22701 bridge because we don't have the right pluggable transport
22702 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
22704 o Minor features (diagnostic):
22705 - Add more log messages to diagnose bug 7164, which causes
22706 intermittent "microdesc_free() called but md was still referenced"
22707 warnings. We now include more information, to figure out why we
22708 might be cleaning a microdescriptor for being too old if it's
22709 still referenced by a live node_t object.
22711 o Minor bugfixes (client, DNSPort):
22712 - When using DNSPort, try to respond to AAAA requests with AAAA
22713 answers. Previously, we hadn't looked at the request type when
22714 deciding which answer type to prefer. Fixes bug 10468; bugfix on
22716 - When receiving a DNS query for an unsupported record type, reply
22717 with no answer rather than with a NOTIMPL error. This behavior
22718 isn't correct either, but it will break fewer client programs, we
22719 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
22722 o Minor bugfixes (exit relay):
22723 - Stop leaking memory when we successfully resolve a PTR record.
22724 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
22726 o Minor bugfixes (bridge client):
22727 - Stop accepting bridge lines containing hostnames. Doing so would
22728 cause clients to perform DNS requests on the hostnames, which was
22729 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
22730 - Avoid a 60-second delay in the bootstrapping process when a Tor
22731 client with pluggable transports re-reads its configuration at
22732 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
22734 o Minor bugfixes (client, logging during bootstrap):
22735 - Warn only once if we start logging in an unsafe way. Previously,
22736 we complain as many times as we had problems. Fixes bug 9870;
22737 bugfix on 0.2.5.1-alpha.
22738 - Only report the first fatal bootstrap error on a given OR
22739 connection. This stops us from telling the controller bogus error
22740 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
22741 - Be more helpful when trying to run sandboxed on Linux without
22742 libseccomp. Instead of saying "Sandbox is not implemented on this
22743 platform", we now explain that we need to be built with
22744 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
22745 - Avoid generating spurious warnings when starting with
22746 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
22749 o Minor bugfixes (closing OR connections):
22750 - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
22751 check if it's an or_connection_t and correctly call
22752 connection_or_close_for_error() rather than
22753 connection_mark_for_close() directly. Fixes bug 11304; bugfix on
22755 - When closing all connections on setting DisableNetwork to 1, use
22756 connection_or_close_normally() rather than closing OR connections
22757 out from under the channel layer. Fixes bug 11306; bugfix on
22760 o Minor bugfixes (controller):
22761 - Avoid sending a garbage value to the controller when a circuit is
22762 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
22764 o Minor bugfixes (tor-fw-helper):
22765 - Allow tor-fw-helper to build again by adding src/ext to its
22766 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
22768 o Minor bugfixes (bridges):
22769 - Avoid potential crashes or bad behavior when launching a
22770 server-side managed proxy with ORPort or ExtORPort temporarily
22771 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
22773 o Minor bugfixes (platform-specific):
22774 - Fix compilation on Solaris, which does not have <endian.h>. Fixes
22775 bug 11426; bugfix on 0.2.5.3-alpha.
22776 - When dumping a malformed directory object to disk, save it in
22777 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
22779 - Don't report failures from make_socket_reuseable() on incoming
22780 sockets on OSX: this can happen when incoming connections close
22781 early. Fixes bug 10081.
22783 o Minor bugfixes (trivial memory leaks):
22784 - Fix a small memory leak when signing a directory object. Fixes bug
22785 11275; bugfix on 0.2.4.13-alpha.
22786 - Free placeholder entries in our circuit table at exit; fixes a
22787 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
22788 - Don't re-initialize a second set of OpenSSL mutexes when starting
22789 up. Previously, we'd make one set of mutexes, and then immediately
22790 replace them with another. Fixes bug 11726; bugfix on
22792 - Resolve some memory leaks found by coverity in the unit tests, on
22793 exit in tor-gencert, and on a failure to compute digests for our
22794 own keys when generating a v3 networkstatus vote. These leaks
22795 should never have affected anyone in practice.
22797 o Minor bugfixes (hidden service):
22798 - Only retry attempts to connect to a chosen rendezvous point 8
22799 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
22801 o Minor bugfixes (misc code correctness):
22802 - Fix various instances of undefined behavior in channeltls.c,
22803 tor_memmem(), and eventdns.c that would cause us to construct
22804 pointers to memory outside an allocated object. (These invalid
22805 pointers were not accessed, but C does not even allow them to
22806 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
22807 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
22808 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
22809 fix some miscellaneous errors in our tests and codebase. Fixes bug
22810 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
22811 - Always check return values for unlink, munmap, UnmapViewOfFile;
22812 check strftime return values more often. In some cases all we can
22813 do is report a warning, but this may help prevent deeper bugs from
22814 going unnoticed. Closes ticket 8787; bugfixes on many, many tor
22816 - Fix numerous warnings from the clang "scan-build" static analyzer.
22817 Some of these are programming style issues; some of them are false
22818 positives that indicated awkward code; some are undefined behavior
22819 cases related to constructing (but not using) invalid pointers;
22820 some are assumptions about API behavior; some are (harmlessly)
22821 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
22822 correct; and one or two are genuine bugs that weren't reachable
22823 from the rest of the program. Fixes bug 8793; bugfixes on many,
22827 - Build the torify.1 manpage again. Previously, we were only trying
22828 to build it when also building tor-fw-helper. That's why we didn't
22829 notice that we'd broken the ability to build it. Fixes bug 11321;
22830 bugfix on 0.2.5.1-alpha.
22831 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
22832 11061; bugfix on 0.2.4.7-alpha.
22833 - Correctly document that we search for a system torrc file before
22834 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
22836 - Resolve warnings from Doxygen.
22838 o Code simplifications and refactoring:
22839 - Remove is_internal_IP() function. Resolves ticket 4645.
22840 - Remove unused function circuit_dump_by_chan from circuitlist.c.
22841 Closes issue 9107; patch from "marek".
22842 - Change our use of the ENUM_BF macro to avoid declarations that
22845 o Deprecated versions:
22846 - Tor 0.2.2.x has reached end-of-life; it has received no patches or
22847 attention for some while. Directory authorities no longer accept
22848 descriptors from relays running any version of Tor prior to Tor
22849 0.2.3.16-alpha. Resolves ticket 11149.
22852 - New macros in test.h to simplify writing mock-functions for unit
22853 tests. Part of ticket 11507. Patch from Dana Koch.
22854 - Complete tests for the status.c module. Resolves ticket 11507.
22855 Patch from Dana Koch.
22858 - Remove all code for the long unused v1 directory protocol.
22859 Resolves ticket 11070.
22862 Changes in version 0.2.5.3-alpha - 2014-03-22
22863 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
22864 two new anti-DoS features for Tor relays, resolves a bug that kept
22865 SOCKS5 support for IPv6 from working, fixes several annoying usability
22866 issues for bridge users, and removes more old code for unused
22869 The Tor 0.2.5.x release series is now in patch-freeze: no feature
22870 patches not already written will be considered for inclusion in 0.2.5.x.
22872 o Major features (relay security, DoS-resistance):
22873 - When deciding whether we have run out of memory and we need to
22874 close circuits, also consider memory allocated in buffers for
22875 streams attached to each circuit.
22877 This change, which extends an anti-DoS feature introduced in
22878 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
22879 better resist more memory-based DoS attacks than before. Since the
22880 MaxMemInCellQueues option now applies to all queues, it is renamed
22881 to MaxMemInQueues. This feature fixes bug 10169.
22882 - Avoid hash-flooding denial-of-service attacks by using the secure
22883 SipHash-2-4 hash function for our hashtables. Without this
22884 feature, an attacker could degrade performance of a targeted
22885 client or server by flooding their data structures with a large
22886 number of entries to be stored at the same hash table position,
22887 thereby slowing down the Tor instance. With this feature, hash
22888 table positions are derived from a randomized cryptographic key,
22889 and an attacker cannot predict which entries will collide. Closes
22891 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
22892 the default at 8GBytes), to better support Raspberry Pi users. Fixes
22893 bug 9686; bugfix on 0.2.4.14-alpha.
22895 o Minor features (bridges, pluggable transports):
22896 - Bridges now write the SHA1 digest of their identity key
22897 fingerprint (that is, a hash of a hash of their public key) to
22898 notice-level logs, and to a new hashed-fingerprint file. This
22899 information will help bridge operators look up their bridge in
22900 Globe and similar tools. Resolves ticket 10884.
22901 - Improve the message that Tor displays when running as a bridge
22902 using pluggable transports without an Extended ORPort listener.
22903 Also, log the message in the log file too. Resolves ticket 11043.
22905 o Minor features (other):
22906 - Add a new option, PredictedPortsRelevanceTime, to control how long
22907 after having received a request to connect to a given port Tor
22908 will try to keep circuits ready in anticipation of future requests
22909 for that port. Patch from "unixninja92"; implements ticket 9176.
22910 - Generate a warning if any ports are listed in the SocksPolicy,
22911 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
22912 AuthDirBadExit options. (These options only support address
22913 ranges.) Fixes part of ticket 11108.
22914 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
22917 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
22918 - Build without warnings under clang 3.4. (We have some macros that
22919 define static functions only some of which will get used later in
22920 the module. Starting with clang 3.4, these give a warning unless the
22921 unused attribute is set on them.) Resolves ticket 10904.
22922 - Fix build warnings about missing "a2x" comment when building the
22923 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
22924 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
22926 o Minor bugfixes (client):
22927 - Improve the log message when we can't connect to a hidden service
22928 because all of the hidden service directory nodes hosting its
22929 descriptor are excluded. Improves on our fix for bug 10722, which
22930 was a bugfix on 0.2.0.10-alpha.
22931 - Raise a control port warning when we fail to connect to all of
22932 our bridges. Previously, we didn't inform the controller, and
22933 the bootstrap process would stall. Fixes bug 11069; bugfix on
22935 - Exit immediately when a process-owning controller exits.
22936 Previously, tor relays would wait for a little while after their
22937 controller exited, as if they had gotten an INT signal -- but this
22938 was problematic, since there was no feedback for the user. To do a
22939 clean shutdown, controllers should send an INT signal and give Tor
22940 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
22941 - Stop attempting to connect to bridges before our pluggable
22942 transports are configured (harmless but resulted in some erroneous
22943 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
22944 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
22945 generating incorrect SOCKS5 responses, and confusing client
22946 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
22948 o Minor bugfixes (relays and bridges):
22949 - Avoid crashing on a malformed resolv.conf file when running a
22950 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
22951 - Non-exit relays no longer launch mock DNS requests to check for
22952 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
22953 non-exit relays stopped servicing DNS requests. Fixes bug 965;
22954 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
22955 - Bridges now report complete directory request statistics. Related
22956 to bug 5824; bugfix on 0.2.2.1-alpha.
22957 - Bridges now never collect statistics that were designed for
22958 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
22959 - Stop giving annoying warning messages when we decide not to launch
22960 a pluggable transport proxy that we don't need (because there are
22961 no bridges configured to use it). Resolves ticket 5018; bugfix
22963 - Give the correct URL in the warning message when trying to run a
22964 relay on an ancient version of Windows. Fixes bug 9393.
22966 o Minor bugfixes (backtrace support):
22967 - Support automatic backtraces on more platforms by using the
22968 "-fasynchronous-unwind-tables" compiler option. This option is
22969 needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
22970 is on by default and table generation is not. This doesn't yet
22971 add Windows support; only Linux, OSX, and some BSDs are affected.
22972 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
22973 - Avoid strange behavior if two threads hit failed assertions at the
22974 same time and both try to log backtraces at once. (Previously, if
22975 this had happened, both threads would have stored their intermediate
22976 results in the same buffer, and generated junk outputs.) Reported by
22977 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
22978 - Fix a compiler warning in format_number_sigsafe(). Bugfix on
22979 0.2.5.2-alpha; patch from Nick Hopper.
22981 o Minor bugfixes (unit tests):
22982 - Fix a small bug in the unit tests that might have made the tests
22983 call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
22984 bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
22987 - Remove all remaining code related to version-0 hidden service
22988 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
22989 the rest of bug 10841.
22992 - Document in the manpage that "KBytes" may also be written as
22993 "kilobytes" or "KB", that "Kbits" may also be written as
22994 "kilobits", and so forth. Closes ticket 9222.
22995 - Document that the ClientOnly config option overrides ORPort.
22996 Our old explanation made ClientOnly sound as though it did
22997 nothing at all. Resolves bug 9059.
22998 - Explain that SocksPolicy, DirPolicy, and similar options don't
22999 take port arguments. Fixes the other part of ticket 11108.
23000 - Fix a comment about the rend_server_descriptor_t.protocols field
23001 to more accurately describe its range. Also, make that field
23002 unsigned, to more accurately reflect its usage. Fixes bug 9099;
23003 bugfix on 0.2.1.5-alpha.
23004 - Fix the manpage's description of HiddenServiceAuthorizeClient:
23005 the maximum client name length is 16, not 19. Fixes bug 11118;
23006 bugfix on 0.2.1.6-alpha.
23008 o Code simplifications and refactoring:
23009 - Get rid of router->address, since in all cases it was just the
23010 string representation of router->addr. Resolves ticket 5528.
23012 o Test infrastructure:
23013 - Update to the latest version of tinytest.
23014 - Improve the tinytest implementation of string operation tests so
23015 that comparisons with NULL strings no longer crash the tests; they
23016 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
23019 Changes in version 0.2.4.21 - 2014-02-28
23020 Tor 0.2.4.21 further improves security against potential adversaries who
23021 find breaking 1024-bit crypto doable, and backports several stability
23022 and robustness patches from the 0.2.5 branch.
23024 o Major features (client security):
23025 - When we choose a path for a 3-hop circuit, make sure it contains
23026 at least one relay that supports the NTor circuit extension
23027 handshake. Otherwise, there is a chance that we're building
23028 a circuit that's worth attacking by an adversary who finds
23029 breaking 1024-bit crypto doable, and that chance changes the game
23030 theory. Implements ticket 9777.
23033 - Do not treat streams that fail with reason
23034 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
23035 since it could also indicate an ENETUNREACH connection error. Fixes
23036 part of bug 10777; bugfix on 0.2.4.8-alpha.
23038 o Code simplification and refactoring:
23039 - Remove data structures which were introduced to implement the
23040 CellStatistics option: they are now redundant with the new timestamp
23041 field in the regular packed_cell_t data structure, which we did
23042 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
23045 - Always clear OpenSSL bignums before freeing them -- even bignums
23046 that don't contain secrets. Resolves ticket 10793. Patch by
23048 - Build without warnings under clang 3.4. (We have some macros that
23049 define static functions only some of which will get used later in
23050 the module. Starting with clang 3.4, these give a warning unless the
23051 unused attribute is set on them.) Resolves ticket 10904.
23052 - Update geoip and geoip6 files to the February 7 2014 Maxmind
23053 GeoLite2 Country database.
23056 - Set the listen() backlog limit to the largest actually supported
23057 on the system, not to the value in a header file. Fixes bug 9716;
23058 bugfix on every released Tor.
23059 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
23060 exit node as a NOROUTE error, not an INTERNAL error, since they
23061 can apparently happen when trying to connect to the wrong sort
23062 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
23063 - Fix build warnings about missing "a2x" comment when building the
23064 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
23065 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
23066 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
23067 not entirely remove it from the connection lists. Fixes bug 9602;
23068 bugfix on 0.2.4.4-alpha.
23069 - Fix a segmentation fault in our benchmark code when running with
23070 Fedora's OpenSSL package, or any other OpenSSL that provides
23071 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
23072 - Turn "circuit handshake stats since last time" log messages into a
23073 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
23075 o Documentation fixes:
23076 - Document that all but one DirPort entry must have the NoAdvertise
23077 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
23080 Changes in version 0.2.5.2-alpha - 2014-02-13
23081 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
23082 like the "poor random number generation" fix and the "building too many
23083 circuits" fix. It also further improves security against potential
23084 adversaries who find breaking 1024-bit crypto doable, and launches
23085 pluggable transports on demand (which gets us closer to integrating
23086 pluggable transport support by default -- not to be confused with Tor
23087 bundles enabling pluggable transports and bridges by default).
23089 o Major features (client security):
23090 - When we choose a path for a 3-hop circuit, make sure it contains
23091 at least one relay that supports the NTor circuit extension
23092 handshake. Otherwise, there is a chance that we're building
23093 a circuit that's worth attacking by an adversary who finds
23094 breaking 1024-bit crypto doable, and that chance changes the game
23095 theory. Implements ticket 9777.
23096 - Clients now look at the "usecreatefast" consensus parameter to
23097 decide whether to use CREATE_FAST or CREATE cells for the first hop
23098 of their circuit. This approach can improve security on connections
23099 where Tor's circuit handshake is stronger than the available TLS
23100 connection security levels, but the tradeoff is more computational
23101 load on guard relays. Implements proposal 221. Resolves ticket 9386.
23103 o Major features (bridges):
23104 - Don't launch pluggable transport proxies if we don't have any
23105 bridges configured that would use them. Now we can list many
23106 pluggable transports, and Tor will dynamically start one when it
23107 hears a bridge address that needs it. Resolves ticket 5018.
23108 - The bridge directory authority now assigns status flags (Stable,
23109 Guard, etc) to bridges based on thresholds calculated over all
23110 Running bridges. Now bridgedb can finally make use of its features
23111 to e.g. include at least one Stable bridge in its answers. Fixes
23114 o Major features (other):
23115 - Extend ORCONN controller event to include an "ID" parameter,
23116 and add four new controller event types CONN_BW, CIRC_BW,
23117 CELL_STATS, and TB_EMPTY that show connection and circuit usage.
23118 The new events are emitted in private Tor networks only, with the
23119 goal of being able to better track performance and load during
23120 full-network simulations. Implements proposal 218 and ticket 7359.
23121 - On some platforms (currently: recent OSX versions, glibc-based
23122 platforms that support the ELF format, and a few other
23123 Unix-like operating systems), Tor can now dump stack traces
23124 when a crash occurs or an assertion fails. By default, traces
23125 are dumped to stderr (if possible) and to any logs that are
23126 reporting errors. Implements ticket 9299.
23129 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
23130 not entirely remove it from the connection lists. Fixes bug 9602;
23131 bugfix on 0.2.4.4-alpha.
23132 - Do not treat streams that fail with reason
23133 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
23134 since it could also indicate an ENETUNREACH connection error. Fixes
23135 part of bug 10777; bugfix on 0.2.4.8-alpha.
23137 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
23138 - Do not allow OpenSSL engines to replace the PRNG, even when
23139 HardwareAccel is set. The only default builtin PRNG engine uses
23140 the Intel RDRAND instruction to replace the entire PRNG, and
23141 ignores all attempts to seed it with more entropy. That's
23142 cryptographically stupid: the right response to a new alleged
23143 entropy source is never to discard all previously used entropy
23144 sources. Fixes bug 10402; works around behavior introduced in
23145 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
23147 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
23148 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
23149 - Avoid launching spurious extra circuits when a stream is pending.
23150 This fixes a bug where any circuit that _wasn't_ unusable for new
23151 streams would be treated as if it were, causing extra circuits to
23152 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
23154 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23155 - No longer stop reading or writing on cpuworker connections when
23156 our rate limiting buckets go empty. Now we should handle circuit
23157 handshake requests more promptly. Resolves bug 9731.
23158 - Stop trying to bootstrap all our directory information from
23159 only our first guard. Discovered while fixing bug 9946; bugfix
23162 o Minor features (bridges, pluggable transports):
23163 - Add threshold cutoffs to the networkstatus document created by
23164 the Bridge Authority. Fixes bug 1117.
23165 - On Windows, spawn background processes using the CREATE_NO_WINDOW
23166 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
23167 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
23168 Vidalia set this option for us.) Implements ticket 10297.
23170 o Minor features (security):
23171 - Always clear OpenSSL bignums before freeing them -- even bignums
23172 that don't contain secrets. Resolves ticket 10793. Patch by
23175 o Minor features (config options and command line):
23176 - Add an --allow-missing-torrc commandline option that tells Tor to
23177 run even if the configuration file specified by -f is not available.
23178 Implements ticket 10060.
23179 - Add support for the TPROXY transparent proxying facility on Linux.
23180 See documentation for the new TransProxyType option for more
23181 details. Implementation by "thomo". Closes ticket 10582.
23183 o Minor features (controller):
23184 - Add a new "HS_DESC" controller event that reports activities
23185 related to hidden service descriptors. Resolves ticket 8510.
23186 - New "DROPGUARDS" controller command to forget all current entry
23187 guards. Not recommended for ordinary use, since replacing guards
23188 too frequently makes several attacks easier. Resolves ticket 9934;
23191 o Minor features (build):
23192 - Assume that a user using ./configure --host wants to cross-compile,
23193 and give an error if we cannot find a properly named
23194 tool-chain. Add a --disable-tool-name-check option to proceed
23195 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
23196 - If we run ./configure and the compiler recognizes -fstack-protector
23197 but the linker rejects it, warn the user about a potentially missing
23198 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
23200 o Minor features (testing):
23201 - If Python is installed, "make check" now runs extra tests beyond
23202 the unit test scripts.
23203 - When bootstrapping a test network, sometimes very few relays get
23204 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
23205 specify a set of relays which should be voted Guard regardless of
23206 their uptime or bandwidth. Addresses ticket 9206.
23208 o Minor features (log messages):
23209 - When ServerTransportPlugin is set on a bridge, Tor can write more
23210 useful statistics about bridge use in its extrainfo descriptors,
23211 but only if the Extended ORPort ("ExtORPort") is set too. Add a
23212 log message to inform the user in this case. Resolves ticket 9651.
23213 - When receiving a new controller connection, log the origin address.
23214 Resolves ticket 9698; patch from "sigpipe".
23215 - When logging OpenSSL engine status at startup, log the status of
23216 more engines. Fixes ticket 10043; patch from Joshua Datko.
23217 - Turn "circuit handshake stats since last time" log messages into a
23218 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
23220 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23221 - Improve the circuit queue out-of-memory handler. Previously, when
23222 we ran low on memory, we'd close whichever circuits had the most
23223 queued cells. Now, we close those that have the *oldest* queued
23224 cells, on the theory that those are most responsible for us
23225 running low on memory. Based on analysis from a forthcoming paper
23226 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
23227 - Generate bootstrapping status update events correctly when fetching
23228 microdescriptors. Fixes bug 9927.
23229 - Update to the October 2 2013 Maxmind GeoLite Country database.
23231 o Minor bugfixes (clients):
23232 - When closing a channel that has already been open, do not close
23233 pending circuits that were waiting to connect to the same relay.
23234 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
23237 o Minor bugfixes (relays):
23238 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
23239 exit node as a NOROUTE error, not an INTERNAL error, since they
23240 can apparently happen when trying to connect to the wrong sort
23241 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
23243 o Minor bugfixes (bridges):
23244 - Fix a bug where the first connection works to a bridge that uses a
23245 pluggable transport with client-side parameters, but we don't send
23246 the client-side parameters on subsequent connections. (We don't
23247 use any pluggable transports with client-side parameters yet,
23248 but ScrambleSuit will soon become the first one.) Fixes bug 9162;
23249 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
23251 o Minor bugfixes (node selection):
23252 - If ExcludeNodes is set, consider non-excluded hidden service
23253 directory servers before excluded ones. Do not consider excluded
23254 hidden service directory servers at all if StrictNodes is
23255 set. (Previously, we would sometimes decide to connect to those
23256 servers, and then realize before we initiated a connection that
23257 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
23258 Reported by "mr-4".
23259 - If we set the ExitNodes option but it doesn't include any nodes
23260 that have the Exit flag, we would choose not to bootstrap. Now we
23261 bootstrap so long as ExitNodes includes nodes which can exit to
23262 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
23264 o Minor bugfixes (controller and command-line):
23265 - If changing a config option via "setconf" fails in a recoverable
23266 way, we used to nonetheless write our new control ports to the
23267 file described by the "ControlPortWriteToFile" option. Now we only
23268 write out that file if we successfully switch to the new config
23269 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
23270 - When a command-line option such as --version or --help that
23271 ordinarily implies --hush appears on the command line along with
23272 --quiet, then actually obey --quiet. Previously, we obeyed --quiet
23273 only if it appeared later on the command line. Fixes bug 9578;
23274 bugfix on 0.2.5.1-alpha.
23276 o Minor bugfixes (code correctness):
23277 - Previously we used two temporary files when writing descriptors to
23278 disk; now we only use one. Fixes bug 1376.
23279 - Remove an erroneous (but impossible and thus harmless) pointer
23280 comparison that would have allowed compilers to skip a bounds
23281 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
23282 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
23283 - Fix an always-true assertion in pluggable transports code so it
23284 actually checks what it was trying to check. Fixes bug 10046;
23285 bugfix on 0.2.3.9-alpha. Found by "dcb".
23287 o Minor bugfixes (protocol correctness):
23288 - When receiving a VERSIONS cell with an odd number of bytes, close
23289 the connection immediately since the cell is malformed. Fixes bug
23290 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
23293 o Minor bugfixes (build):
23294 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
23295 turned off (that is, without support for v2 link handshakes). Fixes
23296 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
23297 - Fix compilation warnings and startup issues when running with
23298 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
23300 - Fix compilation on Solaris 9, which didn't like us having an
23301 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
23303 o Minor bugfixes (testing):
23304 - Fix a segmentation fault in our benchmark code when running with
23305 Fedora's OpenSSL package, or any other OpenSSL that provides
23306 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
23308 o Minor bugfixes (log messages):
23309 - Fix a bug where clients using bridges would report themselves
23310 as 50% bootstrapped even without a live consensus document.
23311 Fixes bug 9922; bugfix on 0.2.1.1-alpha.
23312 - Suppress a warning where, if there's only one directory authority
23313 in the network, we would complain that votes and signatures cannot
23314 be uploaded to other directory authorities. Fixes bug 10842;
23315 bugfix on 0.2.2.26-beta.
23316 - Report bootstrapping progress correctly when we're downloading
23317 microdescriptors. We had updated our "do we have enough microdescs
23318 to begin building circuits?" logic most recently in 0.2.4.10-alpha
23319 (see bug 5956), but we left the bootstrap status event logic at
23320 "how far through getting 1/4 of them are we?" Fixes bug 9958;
23321 bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
23323 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
23324 - Avoid a crash bug when starting with a corrupted microdescriptor
23325 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
23326 - If we fail to dump a previously cached microdescriptor to disk, avoid
23327 freeing duplicate data later on. Fixes bug 10423; bugfix on
23328 0.2.4.13-alpha. Spotted by "bobnomnom".
23330 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23331 - Correctly log long IPv6 exit policies, instead of truncating them
23332 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
23333 - Our default TLS ecdhe groups were backwards: we meant to be using
23334 P224 for relays (for performance win) and P256 for bridges (since
23335 it is more common in the wild). Instead we had it backwards. After
23336 reconsideration, we decided that the default should be P256 on all
23337 hosts, since its security is probably better, and since P224 is
23338 reportedly used quite little in the wild. Found by "skruffy" on
23339 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
23340 - Free directory authority certificate download statuses on exit
23341 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
23343 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23344 - If the guard we choose first doesn't answer, we would try the
23345 second guard, but once we connected to the second guard we would
23346 abandon it and retry the first one, slowing down bootstrapping.
23347 The fix is to treat all our initially chosen guards as acceptable
23348 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
23349 - Fix an assertion failure that would occur when disabling the
23350 ORPort setting on a running Tor process while accounting was
23351 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
23352 - When examining the list of network interfaces to find our address,
23353 do not consider non-running or disabled network interfaces. Fixes
23354 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
23355 - Avoid an off-by-one error when checking buffer boundaries when
23356 formatting the exit status of a pluggable transport helper.
23357 This is probably not an exploitable bug, but better safe than
23358 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
23361 o Removed code and features:
23362 - Clients now reject any directory authority certificates lacking
23363 a dir-key-crosscert element. These have been included since
23364 0.2.1.9-alpha, so there's no real reason for them to be optional
23365 any longer. Completes proposal 157. Resolves ticket 10162.
23366 - Remove all code that existed to support the v2 directory system,
23367 since there are no longer any v2 directory authorities. Resolves
23369 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
23370 options, which were used for designating authorities as "Hidden
23371 service authorities". There has been no use of hidden service
23372 authorities since 0.2.2.1-alpha, when we stopped uploading or
23373 downloading v0 hidden service descriptors. Fixes bug 10881; also
23374 part of a fix for bug 10841.
23376 o Code simplification and refactoring:
23377 - Remove some old fallback code designed to keep Tor clients working
23378 in a network with only two working relays. Elsewhere in the code we
23379 have long since stopped supporting such networks, so there wasn't
23380 much point in keeping it around. Addresses ticket 9926.
23381 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
23382 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
23383 - Remove data structures which were introduced to implement the
23384 CellStatistics option: they are now redundant with the addition
23385 of a timestamp to the regular packed_cell_t data structure, which
23386 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
23389 o Documentation (man page) fixes:
23390 - Update manpage to describe some of the files you can expect to
23391 find in Tor's DataDirectory. Addresses ticket 9839.
23392 - Document that all but one DirPort entry must have the NoAdvertise
23393 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
23395 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23396 - Clarify the usage and risks of setting the ContactInfo torrc line
23397 for your relay or bridge. Resolves ticket 9854.
23398 - Add anchors to the manpage so we can link to the html version of
23399 the documentation for specific options. Resolves ticket 9866.
23400 - Replace remaining references to DirServer in man page and
23401 log entries. Resolves ticket 10124.
23404 - Make the "tor-gencert" tool used by directory authority operators
23405 create 2048-bit signing keys by default (rather than 1024-bit, since
23406 1024-bit is uncomfortably small these days). Addresses ticket 10324.
23409 Changes in version 0.2.4.20 - 2013-12-22
23410 Tor 0.2.4.20 fixes potentially poor random number generation for users
23411 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
23412 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
23413 and 4) have no state file in their DataDirectory (as would happen on
23414 first start). Users who generated relay or hidden service identity
23415 keys in such a situation should discard them and generate new ones.
23417 This release also fixes a logic error that caused Tor clients to build
23418 many more preemptive circuits than they actually need.
23421 - Do not allow OpenSSL engines to replace the PRNG, even when
23422 HardwareAccel is set. The only default builtin PRNG engine uses
23423 the Intel RDRAND instruction to replace the entire PRNG, and
23424 ignores all attempts to seed it with more entropy. That's
23425 cryptographically stupid: the right response to a new alleged
23426 entropy source is never to discard all previously used entropy
23427 sources. Fixes bug 10402; works around behavior introduced in
23428 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
23430 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
23431 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
23432 - Avoid launching spurious extra circuits when a stream is pending.
23433 This fixes a bug where any circuit that _wasn't_ unusable for new
23434 streams would be treated as if it were, causing extra circuits to
23435 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
23438 - Avoid a crash bug when starting with a corrupted microdescriptor
23439 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
23440 - If we fail to dump a previously cached microdescriptor to disk, avoid
23441 freeing duplicate data later on. Fixes bug 10423; bugfix on
23442 0.2.4.13-alpha. Spotted by "bobnomnom".
23445 Changes in version 0.2.4.19 - 2013-12-11
23446 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
23447 (1986-2013). Aaron worked on diverse projects including helping to guide
23448 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
23449 transparency to the U.S government's PACER documents, and contributing
23450 design and development for Tor and Tor2Web. Aaron was one of the latest
23451 martyrs in our collective fight for civil liberties and human rights,
23452 and his death is all the more painful because he was one of us.
23454 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
23455 a new circuit handshake and link encryption that use ECC to provide
23456 better security and efficiency; makes relays better manage circuit
23457 creation requests; uses "directory guards" to reduce client enumeration
23458 risks; makes bridges collect and report statistics about the pluggable
23459 transports they support; cleans up and improves our geoip database;
23460 gets much closer to IPv6 support for clients, bridges, and relays; makes
23461 directory authorities use measured bandwidths rather than advertised
23462 ones when computing flags and thresholds; disables client-side DNS
23463 caching to reduce tracking risks; and fixes a big bug in bridge
23464 reachability testing. This release introduces two new design
23465 abstractions in the code: a new "channel" abstraction between circuits
23466 and or_connections to allow for implementing alternate relay-to-relay
23467 transports, and a new "circuitmux" abstraction storing the queue of
23468 circuits for a channel. The release also includes many stability,
23469 security, and privacy fixes.
23472 Changes in version 0.2.4.18-rc - 2013-11-16
23473 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
23474 series. It takes a variety of fixes from the 0.2.5.x branch to improve
23475 stability, performance, and better handling of edge cases.
23478 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
23479 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
23480 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
23481 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
23482 them to solve bug 6033.)
23485 - No longer stop reading or writing on cpuworker connections when
23486 our rate limiting buckets go empty. Now we should handle circuit
23487 handshake requests more promptly. Resolves bug 9731.
23488 - If we are unable to save a microdescriptor to the journal, do not
23489 drop it from memory and then reattempt downloading it. Fixes bug
23490 9645; bugfix on 0.2.2.6-alpha.
23491 - Stop trying to bootstrap all our directory information from
23492 only our first guard. Discovered while fixing bug 9946; bugfix
23494 - The new channel code sometimes lost track of in-progress circuits,
23495 causing long-running clients to stop building new circuits. The
23496 fix is to always call circuit_n_chan_done(chan, 0) from
23497 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
23499 o Minor bugfixes (on 0.2.4.x):
23500 - Correctly log long IPv6 exit policies, instead of truncating them
23501 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
23502 - Our default TLS ecdhe groups were backwards: we meant to be using
23503 P224 for relays (for performance win) and P256 for bridges (since
23504 it is more common in the wild). Instead we had it backwards. After
23505 reconsideration, we decided that the default should be P256 on all
23506 hosts, since its security is probably better, and since P224 is
23507 reportedly used quite little in the wild. Found by "skruffy" on
23508 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
23509 - Free directory authority certificate download statuses on exit
23510 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
23512 o Minor bugfixes (on 0.2.3.x and earlier):
23513 - If the guard we choose first doesn't answer, we would try the
23514 second guard, but once we connected to the second guard we would
23515 abandon it and retry the first one, slowing down bootstrapping.
23516 The fix is to treat all our initially chosen guards as acceptable
23517 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
23518 - Fix an assertion failure that would occur when disabling the
23519 ORPort setting on a running Tor process while accounting was
23520 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
23521 - When examining the list of network interfaces to find our address,
23522 do not consider non-running or disabled network interfaces. Fixes
23523 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
23524 - Avoid an off-by-one error when checking buffer boundaries when
23525 formatting the exit status of a pluggable transport helper.
23526 This is probably not an exploitable bug, but better safe than
23527 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
23530 o Minor features (protecting client timestamps):
23531 - Clients no longer send timestamps in their NETINFO cells. These were
23532 not used for anything, and they provided one small way for clients
23533 to be distinguished from each other as they moved from network to
23534 network or behind NAT. Implements part of proposal 222.
23535 - Clients now round timestamps in INTRODUCE cells down to the nearest
23536 10 minutes. If a new Support022HiddenServices option is set to 0, or
23537 if it's set to "auto" and the feature is disabled in the consensus,
23538 the timestamp is sent as 0 instead. Implements part of proposal 222.
23539 - Stop sending timestamps in AUTHENTICATE cells. This is not such
23540 a big deal from a security point of view, but it achieves no actual
23541 good purpose, and isn't needed. Implements part of proposal 222.
23542 - Reduce down accuracy of timestamps in hidden service descriptors.
23543 Implements part of proposal 222.
23545 o Minor features (other):
23546 - Improve the circuit queue out-of-memory handler. Previously, when
23547 we ran low on memory, we'd close whichever circuits had the most
23548 queued cells. Now, we close those that have the *oldest* queued
23549 cells, on the theory that those are most responsible for us
23550 running low on memory. Based on analysis from a forthcoming paper
23551 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
23552 - Generate bootstrapping status update events correctly when fetching
23553 microdescriptors. Fixes bug 9927.
23554 - Update to the October 2 2013 Maxmind GeoLite Country database.
23556 o Documentation fixes:
23557 - Clarify the usage and risks of setting the ContactInfo torrc line
23558 for your relay or bridge. Resolves ticket 9854.
23559 - Add anchors to the manpage so we can link to the html version of
23560 the documentation for specific options. Resolves ticket 9866.
23561 - Replace remaining references to DirServer in man page and
23562 log entries. Resolves ticket 10124.
23565 Changes in version 0.2.5.1-alpha - 2013-10-02
23566 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
23567 on Linux, allows bridges that offer pluggable transports to report usage
23568 statistics, fixes many issues to make testing easier, and provides
23569 a pile of minor features and bugfixes that have been waiting for a
23570 release of the new branch.
23572 This is the first alpha release in a new series, so expect there to
23573 be bugs. Users who would rather test out a more stable branch should
23574 stay with 0.2.4.x for now.
23576 o Major features (security):
23577 - Use the seccomp2 syscall filtering facility on Linux to limit
23578 which system calls Tor can invoke. This is an experimental,
23579 Linux-only feature to provide defense-in-depth against unknown
23580 attacks. To try turning it on, set "Sandbox 1" in your torrc
23581 file. Please be ready to report bugs. We hope to add support
23582 for better sandboxing in the future, including more fine-grained
23583 filters, better division of responsibility, and support for more
23584 platforms. This work has been done by Cristian-Matei Toader for
23585 Google Summer of Code.
23586 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
23587 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
23588 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
23589 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
23590 them to solve bug 6033.)
23592 o Major features (other):
23593 - Add support for passing arguments to managed pluggable transport
23594 proxies. Implements ticket 3594.
23595 - Bridges now track GeoIP information and the number of their users
23596 even when pluggable transports are in use, and report usage
23597 statistics in their extra-info descriptors. Resolves tickets 4773
23599 - Make testing Tor networks bootstrap better: lower directory fetch
23600 retry schedules and maximum interval without directory requests,
23601 and raise maximum download tries. Implements ticket 6752.
23602 - Add make target 'test-network' to run tests on a Chutney network.
23603 Implements ticket 8530.
23604 - The ntor handshake is now on-by-default, no matter what the
23605 directory authorities recommend. Implements ticket 8561.
23608 - Instead of writing destroy cells directly to outgoing connection
23609 buffers, queue them and intersperse them with other outgoing cells.
23610 This can prevent a set of resource starvation conditions where too
23611 many pending destroy cells prevent data cells from actually getting
23612 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
23613 bugfix on 0.2.0.1-alpha.
23614 - If we are unable to save a microdescriptor to the journal, do not
23615 drop it from memory and then reattempt downloading it. Fixes bug
23616 9645; bugfix on 0.2.2.6-alpha.
23617 - The new channel code sometimes lost track of in-progress circuits,
23618 causing long-running clients to stop building new circuits. The
23619 fix is to always call circuit_n_chan_done(chan, 0) from
23620 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
23623 - Tor now builds each source file in two modes: a mode that avoids
23624 exposing identifiers needlessly, and another mode that exposes
23625 more identifiers for testing. This lets the compiler do better at
23626 optimizing the production code, while enabling us to take more
23627 radical measures to let the unit tests test things.
23628 - The production builds no longer include functions used only in
23629 the unit tests; all functions exposed from a module only for
23630 unit-testing are now static in production builds.
23631 - Add an --enable-coverage configuration option to make the unit
23632 tests (and a new src/or/tor-cov target) to build with gcov test
23636 - We now have rudimentary function mocking support that our unit
23637 tests can use to test functions in isolation. Function mocking
23638 lets the tests temporarily replace a function's dependencies with
23639 stub functions, so that the tests can check the function without
23640 invoking the other functions it calls.
23641 - Add more unit tests for the <circid,channel>->circuit map, and
23642 the destroy-cell-tracking code to fix bug 7912.
23643 - Unit tests for failing cases of the TAP onion handshake.
23644 - More unit tests for address-manipulation functions.
23646 o Minor features (protecting client timestamps):
23647 - Clients no longer send timestamps in their NETINFO cells. These were
23648 not used for anything, and they provided one small way for clients
23649 to be distinguished from each other as they moved from network to
23650 network or behind NAT. Implements part of proposal 222.
23651 - Clients now round timestamps in INTRODUCE cells down to the nearest
23652 10 minutes. If a new Support022HiddenServices option is set to 0, or
23653 if it's set to "auto" and the feature is disabled in the consensus,
23654 the timestamp is sent as 0 instead. Implements part of proposal 222.
23655 - Stop sending timestamps in AUTHENTICATE cells. This is not such
23656 a big deal from a security point of view, but it achieves no actual
23657 good purpose, and isn't needed. Implements part of proposal 222.
23658 - Reduce down accuracy of timestamps in hidden service descriptors.
23659 Implements part of proposal 222.
23661 o Minor features (config options):
23662 - Config (torrc) lines now handle fingerprints which are missing
23663 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
23664 - Support a --dump-config option to print some or all of the
23665 configured options. Mainly useful for debugging the command-line
23666 option parsing code. Helps resolve ticket 4647.
23667 - Raise awareness of safer logging: notify user of potentially
23668 unsafe config options, like logging more verbosely than severity
23669 "notice" or setting SafeLogging to 0. Resolves ticket 5584.
23670 - Add a new configuration option TestingV3AuthVotingStartOffset
23671 that bootstraps a network faster by changing the timing for
23672 consensus votes. Addresses ticket 8532.
23673 - Add a new torrc option "ServerTransportOptions" that allows
23674 bridge operators to pass configuration parameters to their
23675 pluggable transports. Resolves ticket 8929.
23676 - The config (torrc) file now accepts bandwidth and space limits in
23677 bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
23678 you can now say "16 kilobits", and so on.) Resolves ticket 9214.
23681 o Minor features (build):
23682 - Add support for `--library-versions` flag. Implements ticket 6384.
23683 - Return the "unexpected sendme" warnings to a warn severity, but make
23684 them rate limited, to help diagnose ticket 8093.
23685 - Detect a missing asciidoc, and warn the user about it, during
23686 configure rather than at build time. Fixes issue 6506. Patch from
23689 o Minor features (other):
23690 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
23691 sockets in a single system call. Implements ticket 5129.
23692 - Log current accounting state (bytes sent and received + remaining
23693 time for the current accounting period) in the relay's heartbeat
23694 message. Implements ticket 5526; patch from Peter Retzlaff.
23695 - Implement the TRANSPORT_LAUNCHED control port event that
23696 notifies controllers about new launched pluggable
23697 transports. Resolves ticket 5609.
23698 - If we're using the pure-C 32-bit curve25519_donna implementation
23699 of curve25519, build it with the -fomit-frame-pointer option to
23700 make it go faster on register-starved hosts. This improves our
23701 handshake performance by about 6% on i386 hosts without nacl.
23702 Closes ticket 8109.
23703 - Update to the September 4 2013 Maxmind GeoLite Country database.
23706 - Set the listen() backlog limit to the largest actually supported
23707 on the system, not to the value in a header file. Fixes bug 9716;
23708 bugfix on every released Tor.
23709 - No longer accept malformed http headers when parsing urls from
23710 headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
23711 bugfix on 0.0.6pre1.
23712 - In munge_extrainfo_into_routerinfo(), check the return value of
23713 memchr(). This would have been a serious issue if we ever passed
23714 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
23716 - On the chance that somebody manages to build Tor on a
23717 platform where time_t is unsigned, correct the way that
23718 microdesc_add_to_cache() handles negative time arguments.
23719 Fixes bug 8042; bugfix on 0.2.3.1-alpha.
23720 - Reject relative control socket paths and emit a warning. Previously,
23721 single-component control socket paths would be rejected, but Tor
23722 would not log why it could not validate the config. Fixes bug 9258;
23723 bugfix on 0.2.3.16-alpha.
23725 o Minor bugfixes (command line):
23726 - Use a single command-line parser for parsing torrc options on the
23727 command line and for finding special command-line options to avoid
23728 inconsistent behavior for torrc option arguments that have the same
23729 names as command-line options. Fixes bugs 4647 and 9578; bugfix on
23731 - No longer allow 'tor --hash-password' with no arguments. Fixes bug
23732 9573; bugfix on 0.0.9pre5.
23734 o Minor fixes (build, auxiliary programs):
23735 - Stop preprocessing the "torify" script with autoconf, since
23736 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
23738 - The tor-fw-helper program now follows the standard convention and
23739 exits with status code "0" on success. Fixes bug 9030; bugfix on
23740 0.2.3.1-alpha. Patch by Arlo Breault.
23741 - Corrected ./configure advice for what openssl dev package you should
23742 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
23744 o Minor code improvements:
23745 - Remove constants and tests for PKCS1 padding; it's insecure and
23746 shouldn't be used for anything new. Fixes bug 8792; patch
23748 - Remove instances of strcpy() from the unit tests. They weren't
23749 hurting anything, since they were only in the unit tests, but it's
23750 embarrassing to have strcpy() in the code at all, and some analysis
23751 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
23752 0.2.3.8-alpha. Patch from Arlo Breault.
23754 o Removed features:
23755 - Remove migration code from when we renamed the "cached-routers"
23756 file to "cached-descriptors" back in 0.2.0.8-alpha. This
23757 incidentally resolves ticket 6502 by cleaning up the related code
23758 a bit. Patch from Akshay Hebbar.
23760 o Code simplification and refactoring:
23761 - Extract the common duplicated code for creating a subdirectory
23762 of the data directory and writing to a file in it. Fixes ticket
23763 4282; patch from Peter Retzlaff.
23764 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
23765 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
23766 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
23767 - Add a set of accessor functions for the circuit timeout data
23768 structure. Fixes ticket 6153; patch from "piet".
23769 - Clean up exit paths from connection_listener_new(). Closes ticket
23770 8789. Patch from Arlo Breault.
23771 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
23772 and drop our own custom pkey_eq() implementation. Fixes bug 9043.
23773 - Use a doubly-linked list to implement the global circuit list.
23774 Resolves ticket 9108. Patch from Marek Majkowski.
23775 - Remove contrib/id_to_fp.c since it wasn't used anywhere.
23778 Changes in version 0.2.4.17-rc - 2013-09-05
23779 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
23780 series. It adds an emergency step to help us tolerate the massive
23781 influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
23782 circuit-level handshakes now effectively jump the queue compared to
23783 the 0.2.3 clients using "TAP" handshakes. This release also fixes a
23784 big bug hindering bridge reachability tests.
23787 - Relays now process the new "NTor" circuit-level handshake requests
23788 with higher priority than the old "TAP" circuit-level handshake
23789 requests. We still process some TAP requests to not totally starve
23790 0.2.3 clients when NTor becomes popular. A new consensus parameter
23791 "NumNTorsPerTAP" lets us tune the balance later if we need to.
23792 Implements ticket 9574.
23795 - If the circuit build timeout logic is disabled (via the consensus,
23796 or because we are an authority), then don't build testing circuits.
23797 Fixes bug 9657; bugfix on 0.2.2.14-alpha.
23798 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
23799 previously they did not, which prevented them from receiving
23800 successful connections from relays for self-test or bandwidth
23801 testing. Also, when a relay is extending a circuit to a bridge,
23802 it needs to send a NETINFO cell, even when the bridge hasn't sent
23803 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
23804 - If the time to download the next old-style networkstatus is in
23805 the future, do not decline to consider whether to download the
23806 next microdescriptor networkstatus. Fixes bug 9564; bugfix on
23810 - Avoid double-closing the listener socket in our socketpair()
23811 replacement (used on Windows) in the case where the addresses on
23812 our opened sockets don't match what we expected. Fixes bug 9400;
23813 bugfix on 0.0.2pre7. Found by Coverity.
23815 o Minor fixes (config options):
23816 - Avoid overflows when the user sets MaxCircuitDirtiness to a
23817 ridiculously high value, by imposing a (ridiculously high) 30-day
23818 maximum on MaxCircuitDirtiness.
23819 - Fix the documentation of HeartbeatPeriod to say that the heartbeat
23820 message is logged at notice, not at info.
23821 - Warn and fail if a server is configured not to advertise any
23822 ORPorts at all. (We need *something* to put in our descriptor,
23823 or we just won't work.)
23826 - Track how many "TAP" and "NTor" circuit handshake requests we get,
23827 and how many we complete, and log it every hour to help relay
23828 operators follow trends in network load. Addresses ticket 9658.
23829 - Update to the August 7 2013 Maxmind GeoLite Country database.
23832 Changes in version 0.2.4.16-rc - 2013-08-10
23833 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
23834 series. It fixes several crash bugs in the 0.2.4 branch.
23837 - Fix a bug in the voting algorithm that could yield incorrect results
23838 when a non-naming authority declared too many flags. Fixes bug 9200;
23839 bugfix on 0.2.0.3-alpha.
23840 - Fix an uninitialized read that could in some cases lead to a remote
23841 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
23842 Anybody running a hidden service on the experimental 0.2.4.x
23843 branch should upgrade. (This is, so far as we know, unrelated to
23845 - Avoid an assertion failure when processing DNS replies without the
23846 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
23847 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
23848 0.2.4.15-rc. Found by stem integration tests.
23851 - Fix an invalid memory read that occurred when a pluggable
23852 transport proxy failed its configuration protocol.
23853 Fixes bug 9288; bugfix on 0.2.4.1-alpha.
23854 - When evaluating whether to use a connection that we haven't
23855 decided is canonical using a recent link protocol version,
23856 decide that it's canonical only if it used address _does_
23857 match the desired address. Fixes bug 9309; bugfix on
23858 0.2.4.4-alpha. Reported by skruffy.
23859 - Make the default behavior of NumDirectoryGuards be to track
23860 NumEntryGuards. Now a user who changes only NumEntryGuards will get
23861 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
23862 - Fix a spurious compilation warning with some older versions of
23863 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
23866 - Update to the July 3 2013 Maxmind GeoLite Country database.
23869 Changes in version 0.2.4.15-rc - 2013-07-01
23870 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
23871 series. It fixes a few smaller bugs, but generally appears stable.
23872 Please test it and let us know whether it is!
23875 - When receiving a new configuration file via the control port's
23876 LOADCONF command, do not treat the defaults file as absent.
23877 Fixes bug 9122; bugfix on 0.2.3.9-alpha.
23880 - Issue a warning when running with the bufferevents backend enabled.
23881 It's still not stable, and people should know that they're likely
23882 to hit unexpected problems. Closes ticket 9147.
23885 Changes in version 0.2.4.14-alpha - 2013-06-18
23886 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
23887 present in 0.2.4.13-alpha.
23890 - When we have too much memory queued in circuits (according to a new
23891 MaxMemInCellQueues option), close the circuits consuming the most
23892 memory. This prevents us from running out of memory as a relay if
23893 circuits fill up faster than they can be drained. Fixes bug 9063;
23894 bugfix on the 54th commit of Tor. This bug is a further fix beyond
23895 bug 6252, whose fix was merged into 0.2.3.21-rc.
23897 This change also fixes an earlier approach taken in 0.2.4.13-alpha,
23898 where we tried to solve this issue simply by imposing an upper limit
23899 on the number of queued cells for a single circuit. That approach
23900 proved to be problematic, since there are ways to provoke clients to
23901 send a number of cells in excess of any such reasonable limit. Fixes
23902 bug 9072; bugfix on 0.2.4.13-alpha.
23904 - Limit hidden service descriptors to at most ten introduction
23905 points, to slow one kind of guard enumeration. Fixes bug 9002;
23906 bugfix on 0.1.1.11-alpha.
23909 Changes in version 0.2.4.13-alpha - 2013-06-14
23910 Tor 0.2.4.13-alpha fixes a variety of potential remote crash
23911 vulnerabilities, makes socks5 username/password circuit isolation
23912 actually actually work (this time for sure!), and cleans up a bunch
23913 of other issues in preparation for a release candidate.
23915 o Major bugfixes (robustness):
23916 - Close any circuit that has too many cells queued on it. Fixes
23917 bug 9063; bugfix on the 54th commit of Tor. This bug is a further
23918 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
23919 - Prevent the get_freelists() function from running off the end of
23920 the list of freelists if it somehow gets an unrecognized
23921 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
23923 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
23924 when an exit connection with optimistic data succeeds immediately
23925 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
23927 - Fix a directory authority crash bug when building a consensus
23928 using an older consensus as its basis. Fixes bug 8833. Bugfix
23932 - Avoid a memory leak where we would leak a consensus body when we
23933 find that a consensus which we couldn't previously verify due to
23934 missing certificates is now verifiable. Fixes bug 8719; bugfix
23936 - We used to always request authority certificates by identity digest,
23937 meaning we'd get the newest one even when we wanted one with a
23938 different signing key. Then we would complain about being given
23939 a certificate we already had, and never get the one we really
23940 wanted. Now we use the "fp-sk/" resource as well as the "fp/"
23941 resource to request the one we want. Fixes bug 5595; bugfix on
23943 - Follow the socks5 protocol when offering username/password
23944 authentication. The fix for bug 8117 exposed this bug, and it
23945 turns out real-world applications like Pidgin do care. Bugfix on
23946 0.2.3.2-alpha; fixes bug 8879.
23947 - Prevent failures on Windows Vista and later when rebuilding the
23948 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
23949 bugfix on 0.2.4.12-alpha.
23952 - Fix an impossible buffer overrun in the AES unit tests. Fixes
23953 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
23954 - If for some reason we fail to write a microdescriptor while
23955 rebuilding the cache, do not let the annotations from that
23956 microdescriptor linger in the cache file, and do not let the
23957 microdescriptor stay recorded as present in its old location.
23958 Fixes bug 9047; bugfix on 0.2.2.6-alpha.
23959 - Fix a memory leak that would occur whenever a configuration
23960 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
23961 - Paste the description for PathBias parameters from the man
23962 page into or.h, so the code documents them too. Fixes bug 7982;
23963 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
23964 - Relays now treat a changed IPv6 ORPort as sufficient reason to
23965 publish an updated descriptor. Fixes bug 6026; bugfix on
23967 - When launching a resolve request on behalf of an AF_UNIX control
23968 socket, omit the address field of the new entry connection, used in
23969 subsequent controller events, rather than letting tor_dup_addr()
23970 set it to "<unknown address type>". Fixes bug 8639; bugfix on
23973 o Minor bugfixes (log messages):
23974 - Fix a scaling issue in the path bias accounting code that
23975 resulted in "Bug:" log messages from either
23976 pathbias_scale_close_rates() or pathbias_count_build_success().
23977 This represents a bugfix on a previous bugfix: the original fix
23978 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
23980 - Give a less useless error message when the user asks for an IPv4
23981 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
23985 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
23986 to tolerate bug 8093 for now.
23987 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
23988 in directory authority votes to describe whether they have enough
23989 measured bandwidths to ignore advertised (relay descriptor)
23990 bandwidth claims. Resolves ticket 8711.
23991 - Update to the June 5 2013 Maxmind GeoLite Country database.
23993 o Removed documentation:
23994 - Remove some of the older contents of doc/ as obsolete; move others
23995 to torspec.git. Fixes bug 8965.
23997 o Code simplification and refactoring:
23998 - Avoid using character buffers when constructing most directory
23999 objects: this approach was unwieldy and error-prone. Instead,
24000 build smartlists of strings, and concatenate them when done.
24003 Changes in version 0.2.4.12-alpha - 2013-04-18
24004 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
24005 process for lengthening the guard rotation period, makes directory
24006 authority opinions in the consensus a bit less gameable, makes socks5
24007 username/password circuit isolation actually work, and fixes a wide
24008 variety of other issues.
24011 - Raise the default time that a client keeps an entry guard from
24012 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
24013 2012 paper. (We would make it even longer, but we need better client
24014 load balancing first.) Also, make the guard lifetime controllable
24015 via a new GuardLifetime torrc option and a GuardLifetime consensus
24016 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
24017 - Directory authorities now prefer using measured bandwidths to
24018 advertised ones when computing flags and thresholds. Resolves
24020 - Directory authorities that have more than a threshold number
24021 of relays with measured bandwidths now treat relays with unmeasured
24022 bandwidths as having bandwidth 0. Resolves ticket 8435.
24024 o Major bugfixes (assert / resource use):
24025 - Avoid a bug where our response to TLS renegotiation under certain
24026 network conditions could lead to a busy-loop, with 100% CPU
24027 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
24028 - Avoid an assertion when we discover that we'd like to write a cell
24029 onto a closing connection: just discard the cell. Fixes another
24030 case of bug 7350; bugfix on 0.2.4.4-alpha.
24032 o Major bugfixes (client-side privacy):
24033 - When we mark a circuit as unusable for new circuits, have it
24034 continue to be unusable for new circuits even if MaxCircuitDirtiness
24035 is increased too much at the wrong time, or the system clock jumps
24036 backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
24037 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
24038 which have resolved to internal addresses") is set, apply that
24039 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
24040 - When an exit relay rejects a stream with reason "exit policy", but
24041 we only know an exit policy summary (e.g. from the microdesc
24042 consensus) for it, do not mark the relay as useless for all exiting.
24043 Instead, mark just the circuit as unsuitable for that particular
24044 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
24045 - Allow applications to get proper stream isolation with
24046 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
24047 username/password authentication also offer "no authentication". Tor
24048 had previously preferred "no authentication", so the applications
24049 never actually sent Tor their auth details. Now Tor selects
24050 username/password authentication if it's offered. You can disable
24051 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
24052 bug 8117; bugfix on 0.2.3.3-alpha.
24054 o Major bugfixes (other):
24055 - When unable to find any working directory nodes to use as a
24056 directory guard, give up rather than adding the same non-working
24057 nodes to the directory guard list over and over. Fixes bug 8231;
24058 bugfix on 0.2.4.8-alpha.
24061 - Reject as invalid most directory objects containing a NUL.
24062 Belt-and-suspender fix for bug 8037.
24063 - In our testsuite, create temporary directories with a bit more
24064 entropy in their name to make name collisions less likely. Fixes
24066 - Add CACHED keyword to ADDRMAP events in the control protocol
24067 to indicate whether a DNS result will be cached or not. Resolves
24069 - Update to the April 3 2013 Maxmind GeoLite Country database.
24071 o Minor features (build):
24072 - Detect and reject attempts to build Tor with threading support
24073 when OpenSSL has been compiled without threading support.
24075 - Clarify that when autoconf is checking for nacl, it is checking
24076 specifically for nacl with a fast curve25519 implementation.
24078 - Warn if building on a platform with an unsigned time_t: there
24079 are too many places where Tor currently assumes that time_t can
24080 hold negative values. We'd like to fix them all, but probably
24083 o Minor bugfixes (build):
24084 - Fix some bugs in tor-fw-helper-natpmp when trying to build and
24085 run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
24086 Fixes bug 7280; bugfix on 0.2.3.1-alpha.
24087 - Add the old src/or/micro-revision.i filename to CLEANFILES.
24088 On the off chance that somebody has one, it will go away as soon
24089 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
24090 - Build Tor correctly on 32-bit platforms where the compiler can build
24091 but not run code using the "uint128_t" construction. Fixes bug 8587;
24092 bugfix on 0.2.4.8-alpha.
24093 - Fix compilation warning with some versions of clang that would
24094 prefer the -Wswitch-enum compiler flag to warn about switch
24095 statements with missing enum values, even if those switch
24096 statements have a "default:" statement. Fixes bug 8598; bugfix
24099 o Minor bugfixes (protocol):
24100 - Fix the handling of a TRUNCATE cell when it arrives while the
24101 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
24102 - Fix a misframing issue when reading the version numbers in a
24103 VERSIONS cell. Previously we would recognize [00 01 00 02] as
24104 'version 1, version 2, and version 0x100', when it should have
24105 only included versions 1 and 2. Fixes bug 8059; bugfix on
24106 0.2.0.10-alpha. Reported pseudonymously.
24107 - Make the format and order of STREAM events for DNS lookups
24108 consistent among the various ways to launch DNS lookups. Fixes
24109 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
24110 - Correct our check for which versions of Tor support the EXTEND2
24111 cell. We had been willing to send it to Tor 0.2.4.7-alpha and
24112 later, when support was really added in version 0.2.4.8-alpha.
24113 Fixes bug 8464; bugfix on 0.2.4.8-alpha.
24115 o Minor bugfixes (other):
24116 - Correctly store microdescriptors and extrainfo descriptors with
24117 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
24118 Bug reported by "cypherpunks".
24119 - Increase the width of the field used to remember a connection's
24120 link protocol version to two bytes. Harmless for now, since the
24121 only currently recognized versions are one byte long. Reported
24122 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
24123 - If the state file's path bias counts are invalid (presumably from a
24124 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
24125 additional checks and log messages to the scaling of Path Bias
24126 counts, in case there still are remaining issues with scaling.
24127 Should help resolve bug 8235.
24128 - Eliminate several instances where we use "Nickname=ID" to refer to
24129 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
24130 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
24131 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
24133 o Minor bugfixes (syscalls):
24134 - Always check the return values of functions fcntl() and
24135 setsockopt(). We don't believe these are ever actually failing in
24136 practice, but better safe than sorry. Also, checking these return
24137 values should please analysis tools like Coverity. Patch from
24138 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
24139 - Use direct writes rather than stdio when building microdescriptor
24140 caches, in an attempt to mitigate bug 8031, or at least make it
24143 o Minor bugfixes (config):
24144 - When rejecting a configuration because we were unable to parse a
24145 quoted string, log an actual error message. Fixes bug 7950; bugfix
24147 - Behave correctly when the user disables LearnCircuitBuildTimeout
24148 but doesn't tell us what they would like the timeout to be. Fixes
24149 bug 6304; bugfix on 0.2.2.14-alpha.
24150 - When autodetecting the number of CPUs, use the number of available
24151 CPUs in preference to the number of configured CPUs. Inform the
24152 user if this reduces the number of available CPUs. Fixes bug 8002;
24153 bugfix on 0.2.3.1-alpha.
24154 - Make it an error when you set EntryNodes but disable UseGuardNodes,
24155 since it will (surprisingly to some users) ignore EntryNodes. Fixes
24156 bug 8180; bugfix on 0.2.3.11-alpha.
24157 - Allow TestingTorNetworks to override the 4096-byte minimum for
24158 the Fast threshold. Otherwise they can't bootstrap until they've
24159 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
24160 - Fix some logic errors when the user manually overrides the
24161 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
24164 o Minor bugfixes (log messages to help diagnose bugs):
24165 - If we fail to free a microdescriptor because of bug 7164, log
24166 the filename and line number from which we tried to free it.
24167 - Add another diagnostic to the heartbeat message: track and log
24168 overhead that TLS is adding to the data we write. If this is
24169 high, we are sending too little data to SSL_write at a time.
24170 Diagnostic for bug 7707.
24171 - Add more detail to a log message about relaxed timeouts, to help
24173 - Warn more aggressively when flushing microdescriptors to a
24174 microdescriptor cache fails, in an attempt to mitigate bug 8031,
24175 or at least make it more diagnosable.
24176 - Improve debugging output to help track down bug 8185 ("Bug:
24177 outgoing relay cell has n_chan==NULL. Dropping.")
24178 - Log the purpose of a path-bias testing circuit correctly.
24179 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
24181 o Minor bugfixes (0.2.4.x log messages that were too noisy):
24182 - Don't attempt to relax the timeout of already opened 1-hop circuits.
24183 They might never timeout. This should eliminate some/all cases of
24184 the relaxed timeout log message.
24185 - Use circuit creation time for network liveness evaluation. This
24186 should eliminate warning log messages about liveness caused
24187 by changes in timeout evaluation. Fixes bug 6572; bugfix on
24189 - Reduce a path bias length check from notice to info. The message
24190 is triggered when creating controller circuits. Fixes bug 8196;
24191 bugfix on 0.2.4.8-alpha.
24192 - Fix a path state issue that triggered a notice during relay startup.
24193 Fixes bug 8320; bugfix on 0.2.4.10-alpha.
24194 - Reduce occurrences of warns about circuit purpose in
24195 connection_ap_expire_building(). Fixes bug 8477; bugfix on
24198 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
24199 - If we encounter a write failure on a SOCKS connection before we
24200 finish our SOCKS handshake, don't warn that we closed the
24201 connection before we could send a SOCKS reply. Fixes bug 8427;
24202 bugfix on 0.1.0.1-rc.
24203 - Correctly recognize that [::1] is a loopback address. Fixes
24204 bug 8377; bugfix on 0.2.1.3-alpha.
24205 - Fix a directory authority warn caused when we have a large amount
24206 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
24207 - Don't log inappropriate heartbeat messages when hibernating: a
24208 hibernating node is _expected_ to drop out of the consensus,
24209 decide it isn't bootstrapped, and so forth. Fixes bug 7302;
24210 bugfix on 0.2.3.1-alpha.
24211 - Don't complain about bootstrapping problems while hibernating.
24212 These complaints reflect a general code problem, but not one
24213 with any problematic effects (no connections are actually
24214 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
24216 o Documentation fixes:
24217 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
24218 names match. Fixes bug 7768.
24219 - Make the torify manpage no longer refer to tsocks; torify hasn't
24220 supported tsocks since 0.2.3.14-alpha.
24221 - Make the tor manpage no longer reference tsocks.
24222 - Fix the GeoIPExcludeUnknown documentation to refer to
24223 ExcludeExitNodes rather than the currently nonexistent
24224 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
24227 - The tor-tsocks.conf is no longer distributed or installed. We
24228 recommend that tsocks users use torsocks instead. Resolves
24232 Changes in version 0.2.4.11-alpha - 2013-03-11
24233 Tor 0.2.4.11-alpha makes relay measurement by directory authorities
24234 more robust, makes hidden service authentication work again, and
24235 resolves a DPI fingerprint for Tor's SSL transport.
24237 o Major features (directory authorities):
24238 - Directory authorities now support a new consensus method (17)
24239 where they cap the published bandwidth of servers for which
24240 insufficient bandwidth measurements exist. Fixes part of bug 2286.
24241 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
24242 serve any v2 directory information. Now we can test disabling the
24243 old deprecated v2 directory format, and see whether doing so has
24244 any effect on network load. Begins to fix bug 6783.
24245 - Directory authorities now include inside each vote a statement of
24246 the performance thresholds they used when assigning flags.
24247 Implements ticket 8151.
24249 o Major bugfixes (directory authorities):
24250 - Stop marking every relay as having been down for one hour every
24251 time we restart a directory authority. These artificial downtimes
24252 were messing with our Stable and Guard flag calculations. Fixes
24253 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
24255 o Major bugfixes (hidden services):
24256 - Allow hidden service authentication to succeed again. When we
24257 refactored the hidden service introduction code back
24258 in 0.2.4.1-alpha, we didn't update the code that checks
24259 whether authentication information is present, causing all
24260 authentication checks to return "false". Fix for bug 8207; bugfix
24261 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
24263 o Minor features (relays, bridges):
24264 - Make bridge relays check once a minute for whether their IP
24265 address has changed, rather than only every 15 minutes. Resolves
24266 bugs 1913 and 1992.
24267 - Refactor resolve_my_address() so it returns the method by which we
24268 decided our public IP address (explicitly configured, resolved from
24269 explicit hostname, guessed from interfaces, learned by gethostname).
24270 Now we can provide more helpful log messages when a relay guesses
24271 its IP address incorrectly (e.g. due to unexpected lines in
24272 /etc/hosts). Resolves ticket 2267.
24273 - Teach bridge-using clients to avoid 0.2.2 bridges when making
24274 microdescriptor-related dir requests, and only fall back to normal
24275 descriptors if none of their bridges can handle microdescriptors
24276 (as opposed to the fix in ticket 4013, which caused them to fall
24277 back to normal descriptors if *any* of their bridges preferred
24278 them). Resolves ticket 4994.
24279 - Randomize the lifetime of our SSL link certificate, so censors can't
24280 use the static value for filtering Tor flows. Resolves ticket 8443;
24281 related to ticket 4014 which was included in 0.2.2.33.
24282 - Support a new version of the link protocol that allows 4-byte circuit
24283 IDs. Previously, circuit IDs were limited to 2 bytes, which presented
24284 a possible resource exhaustion issue. Closes ticket 7351; implements
24287 o Minor features (portability):
24288 - Tweak the curve25519-donna*.c implementations to tolerate systems
24289 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
24290 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
24291 the signs of types during autoconf. This is better than our old
24292 approach, which didn't work when cross-compiling.
24293 - Detect the sign of enum values, rather than assuming that MSC is the
24294 only compiler where enum types are all signed. Fixes bug 7727;
24295 bugfix on 0.2.4.10-alpha.
24297 o Minor features (other):
24298 - Say "KBytes" rather than "KB" in the man page (for various values
24299 of K), to further reduce confusion about whether Tor counts in
24300 units of memory or fractions of units of memory. Resolves ticket 7054.
24301 - Clear the high bit on curve25519 public keys before passing them to
24302 our backend, in case we ever wind up using a backend that doesn't do
24303 so itself. If we used such a backend, and *didn't* clear the high bit,
24304 we could wind up in a situation where users with such backends would
24305 be distinguishable from users without. Fixes bug 8121; bugfix on
24307 - Update to the March 6 2013 Maxmind GeoLite Country database.
24309 o Minor bugfixes (clients):
24310 - When we receive a RELAY_END cell with the reason DONE, or with no
24311 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
24312 status as "connection refused". Previously we reported these cases
24313 as success but then immediately closed the connection. Fixes bug
24314 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
24315 - Downgrade an assertion in connection_ap_expire_beginning to an
24316 LD_BUG message. The fix for bug 8024 should prevent this message
24317 from displaying, but just in case, a warn that we can diagnose
24318 is better than more assert crashes. Fixes bug 8065; bugfix on
24320 - Lower path use bias thresholds to .80 for notice and .60 for warn.
24321 Also make the rate limiting flags for the path use bias log messages
24322 independent from the original path bias flags. Fixes bug 8161;
24323 bugfix on 0.2.4.10-alpha.
24325 o Minor bugfixes (relays):
24326 - Stop trying to resolve our hostname so often (e.g. every time we
24327 think about doing a directory fetch). Now we reuse the cached
24328 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
24329 and 2410 (bugfix on 0.1.2.2-alpha).
24330 - Stop sending a stray "(null)" in some cases for the server status
24331 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
24333 - When choosing which stream on a formerly stalled circuit to wake
24334 first, make better use of the platform's weak RNG. Previously,
24335 we had been using the % ("modulo") operator to try to generate a
24336 1/N chance of picking each stream, but this behaves badly with
24337 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
24339 - Use our own weak RNG when we need a weak RNG. Windows's rand() and
24340 Irix's random() only return 15 bits; Solaris's random() returns more
24341 bits but its RAND_MAX says it only returns 15, and so on. Motivated
24342 by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
24344 o Minor bugfixes (directory authorities):
24345 - Directory authorities now use less space when formatting identical
24346 microdescriptor lines in directory votes. Fixes bug 8158; bugfix
24349 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
24350 - Avoid leaking memory if we fail to compute a consensus signature
24351 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
24352 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
24354 - Fix a memory leak during safe-cookie controller authentication.
24355 Bugfix on 0.2.3.13-alpha.
24356 - Avoid memory leak of IPv6 policy content if we fail to format it into
24357 a router descriptor. Bugfix on 0.2.4.7-alpha.
24359 o Minor bugfixes (other code correctness issues):
24360 - Avoid a crash if we fail to generate an extrainfo descriptor.
24361 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
24362 this is CID 718634.
24363 - When detecting the largest possible file descriptor (in order to
24364 close all file descriptors when launching a new program), actually
24365 use _SC_OPEN_MAX. The old code for doing this was very, very broken.
24366 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
24368 - Fix a copy-and-paste error when adding a missing A1 to a routerset
24369 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
24370 Bugfix on 0.2.4.10-alpha.
24371 - Fix an impossible-to-trigger integer overflow when estimating how
24372 long our onionskin queue would take. (This overflow would require us
24373 to accept 4 million onionskins before processing 100 of them.) Fixes
24374 bug 8210; bugfix on 0.2.4.10-alpha.
24376 o Code simplification and refactoring:
24377 - Add a wrapper function for the common "log a message with a
24381 Changes in version 0.2.4.10-alpha - 2013-02-04
24382 Tor 0.2.4.10-alpha adds defenses at the directory authority level from
24383 certain attacks that flood the network with relays; changes the queue
24384 for circuit create requests from a sized-based limit to a time-based
24385 limit; resumes building with MSVC on Windows; and fixes a wide variety
24388 o Major bugfixes (directory authority):
24389 - When computing directory thresholds, ignore any rejected-as-sybil
24390 nodes during the computation so that they can't influence Fast,
24391 Guard, etc. (We should have done this for proposal 109.) Fixes
24393 - When marking a node as a likely sybil, reset its uptime metrics
24394 to zero, so that it cannot time towards getting marked as Guard,
24395 Stable, or HSDir. (We should have done this for proposal 109.) Fixes
24399 - When a TLS write is partially successful but incomplete, remember
24400 that the flushed part has been flushed, and notice that bytes were
24401 actually written. Reported and fixed pseudonymously. Fixes bug
24402 7708; bugfix on Tor 0.1.0.5-rc.
24403 - Reject bogus create and relay cells with 0 circuit ID or 0 stream
24404 ID: these could be used to create unexpected streams and circuits
24405 which would count as "present" to some parts of Tor but "absent"
24406 to others, leading to zombie circuits and streams or to a bandwidth
24407 denial-of-service. Fixes bug 7889; bugfix on every released version
24408 of Tor. Reported by "oftc_must_be_destroyed".
24409 - Rename all macros in our local copy of queue.h to begin with "TOR_".
24410 This change seems the only good way to permanently prevent conflicts
24411 with queue.h on various operating systems. Fixes bug 8107; bugfix
24414 o Major features (relay):
24415 - Instead of limiting the number of queued onionskins (aka circuit
24416 create requests) to a fixed, hard-to-configure number, we limit
24417 the size of the queue based on how many we expect to be able to
24418 process in a given amount of time. We estimate the time it will
24419 take to process an onionskin based on average processing time
24420 of previous onionskins. Closes ticket 7291. You'll never have to
24421 configure MaxOnionsPending again.
24423 o Major features (portability):
24424 - Resume building correctly with MSVC and Makefile.nmake. This patch
24425 resolves numerous bugs and fixes reported by ultramage, including
24426 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
24427 - Make the ntor and curve25519 code build correctly with MSVC.
24428 Fix on 0.2.4.8-alpha.
24431 - When directory authorities are computing thresholds for flags,
24432 never let the threshold for the Fast flag fall below 4096
24433 bytes. Also, do not consider nodes with extremely low bandwidths
24434 when deciding thresholds for various directory flags. This change
24435 should raise our threshold for Fast relays, possibly in turn
24436 improving overall network performance; see ticket 1854. Resolves
24438 - The Tor client now ignores sub-domain components of a .onion
24439 address. This change makes HTTP "virtual" hosting
24440 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
24441 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
24442 hosted on the same hidden service. Implements proposal 204.
24443 - We compute the overhead from passing onionskins back and forth to
24444 cpuworkers, and report it when dumping statistics in response to
24445 SIGUSR1. Supports ticket 7291.
24447 o Minor features (path selection):
24448 - When deciding whether we have enough descriptors to build circuits,
24449 instead of looking at raw relay counts, look at which fraction
24450 of (bandwidth-weighted) paths we're able to build. This approach
24451 keeps clients from building circuits if their paths are likely to
24452 stand out statistically. The default fraction of paths needed is
24453 taken from the consensus directory; you can override it with the
24454 new PathsNeededToBuildCircuits option. Fixes ticket 5956.
24455 - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
24456 and we have GeoIP information, also exclude all nodes with unknown
24457 countries "??" and "A1". This behavior is controlled by the
24458 new GeoIPExcludeUnknown option: you can make such nodes always
24459 excluded with "GeoIPExcludeUnknown 1", and disable the feature
24460 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
24461 gets you the default behavior. Implements feature 7706.
24462 - Path Use Bias: Perform separate accounting for successful circuit
24463 use. Keep separate statistics on stream attempt rates versus stream
24464 success rates for each guard. Provide configurable thresholds to
24465 determine when to emit log messages or disable use of guards that
24466 fail too many stream attempts. Resolves ticket 7802.
24468 o Minor features (log messages):
24469 - When learning a fingerprint for a bridge, log its corresponding
24470 transport type. Implements ticket 7896.
24471 - Improve the log message when "Bug/attack: unexpected sendme cell
24472 from client" occurs, to help us track bug 8093.
24475 - Remove a couple of extraneous semicolons that were upsetting the
24476 cparser library. Patch by Christian Grothoff. Fixes bug 7115;
24477 bugfix on 0.2.2.1-alpha.
24478 - Remove a source of rounding error during path bias count scaling;
24479 don't count cannibalized circuits as used for path bias until we
24480 actually try to use them; and fix a circuit_package_relay_cell()
24481 warning message about n_chan==NULL. Fixes bug 7802.
24482 - Detect nacl when its headers are in a nacl/ subdirectory. Also,
24483 actually link against nacl when we're configured to use it. Fixes
24484 bug 7972; bugfix on 0.2.4.8-alpha.
24485 - Compile correctly with the --disable-curve25519 option. Fixes
24486 bug 8153; bugfix on 0.2.4.8-alpha.
24488 o Build improvements:
24489 - Do not report status verbosely from autogen.sh unless the -v flag
24490 is specified. Fixes issue 4664. Patch from Onizuka.
24491 - Replace all calls to snprintf() outside of src/ext with
24492 tor_snprintf(). Also remove the #define to replace snprintf with
24493 _snprintf on Windows; they have different semantics, and all of
24494 our callers should be using tor_snprintf() anyway. Fixes bug 7304.
24495 - Try to detect if we are ever building on a platform where
24496 memset(...,0,...) does not set the value of a double to 0.0. Such
24497 platforms are permitted by the C standard, though in practice
24498 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
24499 currently support them, but it's better to detect them and fail
24500 than to perform erroneously.
24502 o Removed features:
24503 - Stop exporting estimates of v2 and v3 directory traffic shares
24504 in extrainfo documents. They were unneeded and sometimes inaccurate.
24505 Also stop exporting any v2 directory request statistics. Resolves
24507 - Drop support for detecting and warning about versions of Libevent
24508 before 1.3e. Nothing reasonable ships with them any longer;
24509 warning the user about them shouldn't be needed. Resolves ticket
24512 o Code simplifications and refactoring:
24513 - Rename "isin" functions to "contains", for grammar. Resolves
24515 - Rename Tor's logging function log() to tor_log(), to avoid conflicts
24516 with the natural logarithm function from the system libm. Resolves
24520 Changes in version 0.2.4.9-alpha - 2013-01-15
24521 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
24522 work more robustly.
24525 - Fix backward compatibility logic when receiving an embedded ntor
24526 handshake tunneled in a CREATE cell. This clears up the "Bug:
24527 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
24531 Changes in version 0.2.4.8-alpha - 2013-01-14
24532 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
24533 risks, adds a new stronger and faster circuit handshake, and offers
24534 stronger and faster link encryption when both sides support it.
24537 - Preliminary support for directory guards (proposal 207): when
24538 possible, clients now use their entry guards for non-anonymous
24539 directory requests. This can help prevent client enumeration. Note
24540 that this behavior only works when we have a usable consensus
24541 directory, and when options about what to download are more or less
24542 standard. In the future we should re-bootstrap from our guards,
24543 rather than re-bootstrapping from the preconfigured list of
24544 directory sources that ships with Tor. Resolves ticket 6526.
24545 - Tor relays and clients now support a better CREATE/EXTEND cell
24546 format, allowing the sender to specify multiple address, identity,
24547 and handshake types. Implements Robert Ransom's proposal 200;
24548 closes ticket 7199.
24550 o Major features (new circuit handshake):
24551 - Tor now supports a new circuit extension handshake designed by Ian
24552 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
24553 circuit extension handshake, later called "TAP", was a bit slow
24554 (especially on the relay side), had a fragile security proof, and
24555 used weaker keys than we'd now prefer. The new circuit handshake
24556 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
24557 function, making it significantly more secure than the older
24558 handshake, and significantly faster. Tor can use one of two built-in
24559 pure-C curve25519-donna implementations by Adam Langley, or it
24560 can link against the "nacl" library for a tuned version if present.
24562 The built-in version is very fast for 64-bit systems when building
24563 with GCC. The built-in 32-bit version is still faster than the
24564 old TAP protocol, but using libnacl is better on most such hosts.
24566 Clients don't currently use this protocol by default, since
24567 comparatively few clients support it so far. To try it, set
24568 UseNTorHandshake to 1.
24570 Implements proposal 216; closes ticket 7202.
24572 o Major features (better link encryption):
24573 - Relays can now enable the ECDHE TLS ciphersuites when available
24574 and appropriate. These ciphersuites let us negotiate forward-secure
24575 TLS secret keys more safely and more efficiently than with our
24576 previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
24577 public relays prefer the (faster) P224 group, and bridges prefer
24578 the (more common) P256 group; you can override this with the
24581 Enabling these ciphers was a little tricky, since for a long time,
24582 clients had been claiming to support them without actually doing
24583 so, in order to foil fingerprinting. But with the client-side
24584 implementation of proposal 198 in 0.2.3.17-beta, clients can now
24585 match the ciphers from recent Firefox versions *and* list the
24586 ciphers they actually mean, so relays can believe such clients
24587 when they advertise ECDHE support in their TLS ClientHello messages.
24589 This feature requires clients running 0.2.3.17-beta or later,
24590 and requires both sides to be running OpenSSL 1.0.0 or later
24591 with ECC support. OpenSSL 1.0.1, with the compile-time option
24592 "enable-ec_nistp_64_gcc_128", is highly recommended.
24594 Implements the relay side of proposal 198; closes ticket 7200.
24597 - Avoid crashing when, as a relay without IPv6-exit support, a
24598 client insists on getting an IPv6 address or nothing. Fixes bug
24599 7814; bugfix on 0.2.4.7-alpha.
24602 - Improve circuit build timeout handling for hidden services.
24603 In particular: adjust build timeouts more accurately depending
24604 upon the number of hop-RTTs that a particular circuit type
24605 undergoes. Additionally, launch intro circuits in parallel
24606 if they timeout, and take the first one to reply as valid.
24607 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
24608 separate error codes; or at least, don't break for that reason.
24609 Fixes bug 7935. Reported by "oftc_must_be_destroyed".
24610 - Update to the January 2 2013 Maxmind GeoLite Country database.
24612 o Minor features (testing):
24613 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
24614 (P-256) Diffie-Hellman handshakes to src/or/bench.
24615 - Add benchmark functions to test onion handshake performance.
24617 o Minor features (path bias detection):
24618 - Alter the Path Bias log messages to be more descriptive in terms
24619 of reporting timeouts and other statistics.
24620 - Create three levels of Path Bias log messages, as opposed to just
24621 two. These are configurable via consensus as well as via the torrc
24622 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
24623 The default values are 0.70, 0.50, and 0.30 respectively.
24624 - Separate the log message levels from the decision to drop guards,
24625 which also is available via torrc option PathBiasDropGuards.
24626 PathBiasDropGuards still defaults to 0 (off).
24627 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
24628 in combination with PathBiasExtremeRate.
24629 - Increase the default values for PathBiasScaleThreshold and
24630 PathBiasCircThreshold from (200, 20) to (300, 150).
24631 - Add in circuit usage accounting to path bias. If we try to use a
24632 built circuit but fail for any reason, it counts as path bias.
24633 Certain classes of circuits where the adversary gets to pick your
24634 destination node are exempt from this accounting. Usage accounting
24635 can be specifically disabled via consensus parameter or torrc.
24636 - Convert all internal path bias state to double-precision floating
24637 point, to avoid roundoff error and other issues.
24638 - Only record path bias information for circuits that have completed
24639 *two* hops. Assuming end-to-end tagging is the attack vector, this
24640 makes us more resilient to ambient circuit failure without any
24641 detection capability loss.
24643 o Minor bugfixes (log messages):
24644 - Rate-limit the "No circuits are opened. Relaxed timeout for a
24645 circuit with channel state open..." message to once per hour to
24646 keep it from filling the notice logs. Mitigates bug 7799 but does
24647 not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
24648 - Avoid spurious warnings when configuring multiple client ports of
24649 which only some are nonlocal. Previously, we had claimed that some
24650 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
24653 o Code simplifications and refactoring:
24654 - Get rid of a couple of harmless clang warnings, where we compared
24655 enums to ints. These warnings are newly introduced in clang 3.2.
24656 - Split the onion.c file into separate modules for the onion queue
24657 and the different handshakes it supports.
24658 - Remove the marshalling/unmarshalling code for sending requests to
24659 cpuworkers over a socket, and instead just send structs. The
24660 recipient will always be the same Tor binary as the sender, so
24661 any encoding is overkill.
24664 Changes in version 0.2.4.7-alpha - 2012-12-24
24665 Tor 0.2.4.7-alpha introduces a new approach to providing fallback
24666 directory mirrors for more robust bootstrapping; fixes more issues where
24667 clients with changing network conditions refuse to make any circuits;
24668 adds initial support for exiting to IPv6 addresses; resumes being able
24669 to update our GeoIP database, and includes the geoip6 file this time;
24670 turns off the client-side DNS cache by default due to privacy risks;
24671 and fixes a variety of other issues.
24673 o Major features (client resilience):
24674 - Add a new "FallbackDir" torrc option to use when we can't use
24675 a directory mirror from the consensus (either because we lack a
24676 consensus, or because they're all down). Currently, all authorities
24677 are fallbacks by default, and there are no other default fallbacks,
24678 but that will change. This option will allow us to give clients a
24679 longer list of servers to try to get a consensus from when first
24680 connecting to the Tor network, and thereby reduce load on the
24681 directory authorities. Implements proposal 206, "Preconfigured
24682 directory sources for bootstrapping". We also removed the old
24683 "FallbackNetworkstatus" option, since we never got it working well
24684 enough to use it. Closes bug 572.
24685 - If we have no circuits open, use a relaxed timeout (the
24686 95-percentile cutoff) until a circuit succeeds. This heuristic
24687 should allow Tor to succeed at building circuits even when the
24688 network connection drastically changes. Should help with bug 3443.
24690 o Major features (IPv6):
24691 - Relays can now exit to IPv6 addresses: make sure that you have IPv6
24692 connectivity, then set the IPv6Exit flag to 1. Also make sure your
24693 exit policy reads as you would like: the address * applies to all
24694 address families, whereas *4 is IPv4 address only, and *6 is IPv6
24695 addresses only. On the client side, you'll need to wait until the
24696 authorities have upgraded, wait for enough exits to support IPv6,
24697 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
24698 ticket 5547, implements proposal 117 as revised in proposal 208.
24700 We DO NOT recommend that clients with actual anonymity needs start
24701 using IPv6 over Tor yet, since not enough exits support it yet.
24703 o Major features (geoip database):
24704 - Maxmind began labelling Tor relays as being in country "A1",
24705 which breaks by-country node selection inside Tor. Now we use a
24706 script to replace "A1" ("Anonymous Proxy") entries in our geoip
24707 file with real country codes. This script fixes about 90% of "A1"
24708 entries automatically and uses manual country code assignments to
24709 fix the remaining 10%. See src/config/README.geoip for details.
24710 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
24711 Country database, as modified above.
24713 o Major bugfixes (client-side DNS):
24714 - Turn off the client-side DNS cache by default. Updating and using
24715 the DNS cache is now configurable on a per-client-port
24716 level. SOCKSPort, DNSPort, etc lines may now contain
24717 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
24718 cache these types of DNS answers when we receive them from an
24719 exit node in response to an application request on this port, and
24720 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
24721 cached DNS answers of these types, we shouldn't use them. It's
24722 potentially risky to use cached DNS answers at the client, since
24723 doing so can indicate to one exit what answers we've gotten
24724 for DNS lookups in the past. With IPv6, this becomes especially
24725 problematic. Using cached DNS answers for requests on the same
24726 circuit would present less linkability risk, since all traffic
24727 on a circuit is already linkable, but it would also provide
24728 little performance benefit: the exit node caches DNS replies
24729 too. Implements a simplified version of Proposal 205. Implements
24732 o Major bugfixes (other):
24733 - Alter circuit build timeout measurement to start at the point
24734 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
24735 initialization). This should make our timeout measurements more
24736 uniform. Previously, we were sometimes including ORconn setup time
24737 in our circuit build time measurements. Should resolve bug 3443.
24738 - Fix an assertion that could trigger in hibernate_go_dormant() when
24739 closing an or_connection_t: call channel_mark_for_close() rather
24740 than connection_mark_for_close(). Fixes bug 7267. Bugfix on
24742 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
24743 7655; bugfix on 0.2.4.6-alpha.
24746 - Add a new torrc option "ServerTransportListenAddr" to let bridge
24747 operators select the address where their pluggable transports will
24748 listen for connections. Resolves ticket 7013.
24749 - Allow an optional $ before the node identity digest in the
24750 controller command GETINFO ns/id/<identity>, for consistency with
24751 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
24752 - Log packaged cell fullness as part of the heartbeat message.
24753 Diagnosis to try to determine the extent of bug 7743.
24755 o Minor features (IPv6):
24756 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
24757 prefer to hand out virtual IPv6 addresses, since there are more of
24758 them and we can't run out. To override this behavior and make IPv4
24759 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
24760 or DNSPort you're using for resolving. Implements ticket 7571.
24761 - AutomapHostsOnResolve responses are now randomized, to avoid
24762 annoying situations where Tor is restarted and applications
24763 connect to the wrong addresses.
24764 - Never try more than 1000 times to pick a new virtual address when
24765 AutomapHostsOnResolve is set. That's good enough so long as we
24766 aren't close to handing out our entire virtual address space;
24767 if you're getting there, it's best to switch to IPv6 virtual
24771 - The ADDRMAP command can no longer generate an ill-formed error
24772 code on a failed MAPADDRESS. It now says "internal" rather than
24773 an English sentence fragment with spaces in the middle. Bugfix on
24774 Tor 0.2.0.19-alpha.
24775 - Fix log messages and comments to avoid saying "GMT" when we mean
24776 "UTC". Fixes bug 6113.
24777 - Compile on win64 using mingw64. Fixes bug 7260; patches from
24779 - Fix a crash when debugging unit tests on Windows: deallocate a
24780 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
24781 bugfix on 0.2.2.17-alpha. Reported by "ultramage".
24784 - The DirServer option is now DirAuthority, for consistency with
24785 current naming patterns. You can still use the old DirServer form.
24787 o Code simplification and refactoring:
24788 - Move the client-side address-map/virtual-address/DNS-cache code
24789 out of connection_edge.c into a new addressmap.c module.
24790 - Remove unused code for parsing v1 directories and "running routers"
24791 documents. Fixes bug 6887.
24794 Changes in version 0.2.3.25 - 2012-11-19
24795 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
24796 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
24797 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
24798 programmer, and friend. Unstinting in his dedication to the cause of
24799 freedom, he inspired and helped many of us as we began our work on
24800 anonymity, and inspires us still. Please honor his memory by writing
24801 software to protect people's freedoms, and by helping others to do so.
24803 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
24804 significantly reduced directory overhead (via microdescriptors),
24805 enormous crypto performance improvements for fast relays on new
24806 enough hardware, a new v3 TLS handshake protocol that can better
24807 resist fingerprinting, support for protocol obfuscation plugins (aka
24808 pluggable transports), better scalability for hidden services, IPv6
24809 support for bridges, performance improvements like allowing clients
24810 to skip the first round-trip on the circuit ("optimistic data") and
24811 refilling token buckets more often, a new "stream isolation" design
24812 to isolate different applications on different circuits, and many
24813 stability, security, and privacy fixes.
24816 - Tor tries to wipe potentially sensitive data after using it, so
24817 that if some subsequent security failure exposes Tor's memory,
24818 the damage will be limited. But we had a bug where the compiler
24819 was eliminating these wipe operations when it decided that the
24820 memory was no longer visible to a (correctly running) program,
24821 hence defeating our attempt at defense in depth. We fix that
24822 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
24823 is unlikely to optimize away. Future versions of Tor may use
24824 a less ridiculously heavy approach for this. Fixes bug 7352.
24825 Reported in an article by Andrey Karpov.
24828 - Fix a harmless bug when opting against publishing a relay descriptor
24829 because DisableNetwork is set. Fixes bug 7464; bugfix on
24833 Changes in version 0.2.4.6-alpha - 2012-11-13
24834 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
24835 makes our defense-in-depth memory wiping more reliable, and begins to
24836 count IPv6 addresses in bridge statistics,
24839 - Fix an assertion failure that could occur when closing a connection
24840 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
24842 - Tor tries to wipe potentially sensitive data after using it, so
24843 that if some subsequent security failure exposes Tor's memory,
24844 the damage will be limited. But we had a bug where the compiler
24845 was eliminating these wipe operations when it decided that the
24846 memory was no longer visible to a (correctly running) program,
24847 hence defeating our attempt at defense in depth. We fix that
24848 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
24849 is unlikely to optimize away. Future versions of Tor may use
24850 a less ridiculously heavy approach for this. Fixes bug 7352.
24851 Reported in an article by Andrey Karpov.
24854 - Add GeoIP database for IPv6 addresses. The new config option
24856 - Bridge statistics now count bridge clients connecting over IPv6:
24857 bridge statistics files now list "bridge-ip-versions" and
24858 extra-info documents list "geoip6-db-digest". The control protocol
24859 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
24860 implementation by "shkoo", addressing ticket 5055.
24863 - Warn when we are binding low ports when hibernation is enabled;
24864 previously we had warned when we were _advertising_ low ports with
24865 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
24866 - Fix a harmless bug when opting against publishing a relay descriptor
24867 because DisableNetwork is set. Fixes bug 7464; bugfix on
24869 - Add warning message when a managed proxy dies during configuration.
24870 Fixes bug 7195; bugfix on 0.2.4.2-alpha.
24871 - Fix a linking error when building tor-fw-helper without miniupnp.
24872 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
24873 - Check for closing an or_connection_t without going through correct
24874 channel functions; emit a warning and then call
24875 connection_or_close_for_error() so we don't assert as in bugs 7212
24877 - Compile correctly on compilers without C99 designated initializer
24878 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
24879 - Avoid a possible assert that can occur when channel_send_destroy() is
24880 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
24881 or CHANNEL_STATE_ERROR when the Tor process is resumed after being
24882 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
24883 - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
24884 Fixes bug 7422; bugfix on 0.2.4.4-alpha.
24886 o Code simplification and refactoring:
24887 - Start using OpenBSD's implementation of queue.h, so that we don't
24888 need to hand-roll our own pointer and list structures whenever we
24889 need them. (We can't rely on a sys/queue.h, since some operating
24890 systems don't have them, and the ones that do have them don't all
24891 present the same extensions.)
24894 Changes in version 0.2.4.5-alpha - 2012-10-25
24895 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
24896 two important security vulnerabilities that could lead to remotely
24897 triggerable relay crashes, fix a major bug that was preventing clients
24898 from choosing suitable exit nodes, and refactor some of our code.
24900 o Major bugfixes (security, also in 0.2.3.24-rc):
24901 - Fix a group of remotely triggerable assertion failures related to
24902 incorrect link protocol negotiation. Found, diagnosed, and fixed
24903 by "some guy from France". Fix for CVE-2012-2250; bugfix on
24905 - Fix a denial of service attack by which any directory authority
24906 could crash all the others, or by which a single v2 directory
24907 authority could crash everybody downloading v2 directory
24908 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
24910 o Major bugfixes (also in 0.2.3.24-rc):
24911 - When parsing exit policy summaries from microdescriptors, we had
24912 previously been ignoring the last character in each one, so that
24913 "accept 80,443,8080" would be treated by clients as indicating
24914 a node that allows access to ports 80, 443, and 808. That would
24915 lead to clients attempting connections that could never work,
24916 and ignoring exit nodes that would support their connections. Now
24917 clients parse these exit policy summaries correctly. Fixes bug 7192;
24918 bugfix on 0.2.3.1-alpha.
24920 o Minor bugfixes (also in 0.2.3.24-rc):
24921 - Clients now consider the ClientRejectInternalAddresses config option
24922 when using a microdescriptor consensus stanza to decide whether
24923 an exit relay would allow exiting to an internal address. Fixes
24924 bug 7190; bugfix on 0.2.3.1-alpha.
24927 - Only disable TLS session ticket support when running as a TLS
24928 server. Now clients will blend better with regular Firefox
24929 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
24931 o Code simplification and refactoring:
24932 - Start using OpenBSD's implementation of queue.h (originally by
24934 - Move the entry node code from circuitbuild.c to its own file.
24935 - Move the circuit build timeout tracking code from circuitbuild.c
24939 Changes in version 0.2.3.24-rc - 2012-10-25
24940 Tor 0.2.3.24-rc fixes two important security vulnerabilities that
24941 could lead to remotely triggerable relay crashes, and fixes
24942 a major bug that was preventing clients from choosing suitable exit
24945 o Major bugfixes (security):
24946 - Fix a group of remotely triggerable assertion failures related to
24947 incorrect link protocol negotiation. Found, diagnosed, and fixed
24948 by "some guy from France". Fix for CVE-2012-2250; bugfix on
24950 - Fix a denial of service attack by which any directory authority
24951 could crash all the others, or by which a single v2 directory
24952 authority could crash everybody downloading v2 directory
24953 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
24956 - When parsing exit policy summaries from microdescriptors, we had
24957 previously been ignoring the last character in each one, so that
24958 "accept 80,443,8080" would be treated by clients as indicating
24959 a node that allows access to ports 80, 443, and 808. That would
24960 lead to clients attempting connections that could never work,
24961 and ignoring exit nodes that would support their connections. Now
24962 clients parse these exit policy summaries correctly. Fixes bug 7192;
24963 bugfix on 0.2.3.1-alpha.
24966 - Clients now consider the ClientRejectInternalAddresses config option
24967 when using a microdescriptor consensus stanza to decide whether
24968 an exit relay would allow exiting to an internal address. Fixes
24969 bug 7190; bugfix on 0.2.3.1-alpha.
24972 Changes in version 0.2.4.4-alpha - 2012-10-20
24973 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
24974 vulnerability introduced by a change in OpenSSL, fixes a remotely
24975 triggerable assert, and adds new channel_t and circuitmux_t abstractions
24976 that will make it easier to test new connection transport and cell
24977 scheduling algorithms.
24979 o New directory authorities (also in 0.2.3.23-rc):
24980 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
24981 authority. Closes ticket 5749.
24983 o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
24984 - Disable TLS session tickets. OpenSSL's implementation was giving
24985 our TLS session keys the lifetime of our TLS context objects, when
24986 perfect forward secrecy would want us to discard anything that
24987 could decrypt a link connection as soon as the link connection
24988 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
24989 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
24990 - Discard extraneous renegotiation attempts once the V3 link
24991 protocol has been initiated. Failure to do so left us open to
24992 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
24993 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
24995 o Internal abstraction features:
24996 - Introduce new channel_t abstraction between circuits and
24997 or_connection_t to allow for implementing alternate OR-to-OR
24998 transports. A channel_t is an abstract object which can either be a
24999 cell-bearing channel, which is responsible for authenticating and
25000 handshaking with the remote OR and transmitting cells to and from
25001 it, or a listening channel, which spawns new cell-bearing channels
25002 at the request of remote ORs. Implements part of ticket 6465.
25003 - Also new is the channel_tls_t subclass of channel_t, adapting it
25004 to the existing or_connection_t code. The V2/V3 protocol handshaking
25005 code which formerly resided in command.c has been moved below the
25006 channel_t abstraction layer and may be found in channeltls.c now.
25007 Implements the rest of ticket 6465.
25008 - Introduce new circuitmux_t storing the queue of circuits for
25009 a channel; this encapsulates and abstracts the queue logic and
25010 circuit selection policy, and allows the latter to be overridden
25011 easily by switching out a policy object. The existing EWMA behavior
25012 is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
25014 o Required libraries:
25015 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
25016 strongly recommended.
25019 - Warn users who run hidden services on a Tor client with
25020 UseEntryGuards disabled that their hidden services will be
25021 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
25022 attack which motivated Tor to support entry guards in the first
25023 place). Resolves ticket 6889.
25024 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
25025 dhill. Resolves ticket 6982.
25026 - Option OutboundBindAddress can be specified multiple times and
25027 accepts IPv6 addresses. Resolves ticket 6876.
25029 o Minor bugfixes (also in 0.2.3.23-rc):
25030 - Don't serve or accept v2 hidden service descriptors over a
25031 relay's DirPort. It's never correct to do so, and disabling it
25032 might make it more annoying to exploit any bugs that turn up in the
25033 descriptor-parsing code. Fixes bug 7149.
25034 - Fix two cases in src/or/transports.c where we were calling
25035 fmt_addr() twice in a parameter list. Bug found by David
25036 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
25037 - Fix memory leaks whenever we logged any message about the "path
25038 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
25039 - When relays refuse a "create" cell because their queue of pending
25040 create cells is too big (typically because their cpu can't keep up
25041 with the arrival rate), send back reason "resource limit" rather
25042 than reason "internal", so network measurement scripts can get a
25043 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
25046 - Command-line option "--version" implies "--quiet". Fixes bug 6997.
25047 - Free some more still-in-use memory at exit, to make hunting for
25048 memory leaks easier. Resolves bug 7029.
25049 - When a Tor client gets a "truncated" relay cell, the first byte of
25050 its payload specifies why the circuit was truncated. We were
25051 ignoring this 'reason' byte when tearing down the circuit, resulting
25052 in the controller not being told why the circuit closed. Now we
25053 pass the reason from the truncated cell to the controller. Bugfix
25054 on 0.1.2.3-alpha; fixes bug 7039.
25055 - Downgrade "Failed to hand off onionskin" messages to "debug"
25056 severity, since they're typically redundant with the "Your computer
25057 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
25058 - Make clients running with IPv6 bridges connect over IPv6 again,
25059 even without setting new config options ClientUseIPv6 and
25060 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
25061 - Use square brackets around IPv6 addresses in numerous places
25062 that needed them, including log messages, HTTPS CONNECT proxy
25063 requests, TransportProxy statefile entries, and pluggable transport
25064 extra-info lines. Fixes bug 7011; patch by David Fifield.
25066 o Code refactoring and cleanup:
25067 - Source files taken from other packages now reside in src/ext;
25068 previously they were scattered around the rest of Tor.
25069 - Avoid use of reserved identifiers in our C code. The C standard
25070 doesn't like us declaring anything that starts with an
25071 underscore, so let's knock it off before we get in trouble. Fix
25072 for bug 1031; bugfix on the first Tor commit.
25075 Changes in version 0.2.3.23-rc - 2012-10-20
25076 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
25077 vulnerability introduced by a change in OpenSSL, and fixes a variety
25078 of smaller bugs in preparation for the release.
25080 o New directory authorities:
25081 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
25082 authority. Closes ticket 5749.
25084 o Major bugfixes (security/privacy):
25085 - Disable TLS session tickets. OpenSSL's implementation was giving
25086 our TLS session keys the lifetime of our TLS context objects, when
25087 perfect forward secrecy would want us to discard anything that
25088 could decrypt a link connection as soon as the link connection
25089 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
25090 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
25091 - Discard extraneous renegotiation attempts once the V3 link
25092 protocol has been initiated. Failure to do so left us open to
25093 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
25094 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
25097 - Fix a possible crash bug when checking for deactivated circuits
25098 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
25099 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
25101 o Minor bugfixes (on 0.2.3.x):
25102 - Fix two cases in src/or/transports.c where we were calling
25103 fmt_addr() twice in a parameter list. Bug found by David
25104 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
25105 - Convert an assert in the pathbias code to a log message. The assert
25106 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
25107 bugfix on 0.2.3.17-beta.
25108 - Fix memory leaks whenever we logged any message about the "path
25109 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
25111 o Minor bugfixes (on 0.2.2.x and earlier):
25112 - Don't serve or accept v2 hidden service descriptors over a relay's
25113 DirPort. It's never correct to do so, and disabling it might
25114 make it more annoying to exploit any bugs that turn up in the
25115 descriptor-parsing code. Fixes bug 7149.
25116 - When relays refuse a "create" cell because their queue of pending
25117 create cells is too big (typically because their cpu can't keep up
25118 with the arrival rate), send back reason "resource limit" rather
25119 than reason "internal", so network measurement scripts can get a
25120 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
25121 - Correct file sizes when reading binary files on Cygwin, to avoid
25122 a bug where Tor would fail to read its state file. Fixes bug 6844;
25123 bugfix on 0.1.2.7-alpha.
25124 - Avoid undefined behavior when parsing the list of supported
25125 rendezvous/introduction protocols in a hidden service descriptor.
25126 Previously, Tor would have confused (as-yet-unused) protocol version
25127 numbers greater than 32 with lower ones on many platforms. Fixes
25128 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
25130 o Documentation fixes:
25131 - Clarify that hidden services are TCP only. Fixes bug 6024.
25134 Changes in version 0.2.4.3-alpha - 2012-09-22
25135 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
25136 assertion, resumes letting relays test reachability of their DirPort,
25137 and cleans up a bunch of smaller bugs.
25140 - Fix an assertion failure in tor_timegm() that could be triggered
25141 by a badly formatted directory object. Bug found by fuzzing with
25142 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25145 - Fix a possible crash bug when checking for deactivated circuits
25146 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
25147 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
25148 - Allow routers to detect that their own DirPorts are running. When
25149 we removed support for versions_supports_begindir, we also
25150 accidentally removed the mechanism we used to self-test our
25151 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
25152 bugfix on 0.2.4.2-alpha.
25154 o Security features:
25155 - Switch to a completely time-invariant approach for picking nodes
25156 weighted by bandwidth. Our old approach would run through the
25157 part of the loop after it had made its choice slightly slower
25158 than it ran through the part of the loop before it had made its
25159 choice. Addresses ticket 6538.
25160 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
25161 by tor2web clients allows hidden services to identify tor2web
25162 clients through their repeated selection of the same rendezvous
25163 and introduction point circuit endpoints (their guards). Resolves
25167 - Enable Tor to read configuration, state, and key information from
25168 a FIFO. Previously Tor would only read from files with a positive
25169 stat.st_size. Code from meejah; fixes bug 6044.
25172 - Correct file sizes when reading binary files on Cygwin, to avoid
25173 a bug where Tor would fail to read its state file. Fixes bug 6844;
25174 bugfix on 0.1.2.7-alpha.
25175 - Correctly handle votes with more than 31 flags. Fixes bug 6853;
25176 bugfix on 0.2.0.3-alpha.
25177 - When complaining about a client port on a public address, log
25178 which address we're complaining about. Fixes bug 4020; bugfix on
25179 0.2.3.3-alpha. Patch by Tom Fitzhenry.
25180 - Convert an assert in the pathbias code to a log message. The assert
25181 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
25182 bugfix on 0.2.3.17-beta.
25183 - Our new buildsystem was overzealous about rebuilding manpages: it
25184 would rebuild them all whenever any one of them changed. Now our
25185 dependency checking should be correct. Fixes bug 6843; bugfix on
25187 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
25188 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
25189 - Correct log printout about which address family is preferred
25190 when connecting to a bridge with both an IPv4 and IPv6 OR port.
25191 Fixes bug 6884; bugfix on 0.2.4.1-alpha.
25193 o Minor bugfixes (code cleanliness):
25194 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
25195 with large values. This situation was untriggered, but nevertheless
25196 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
25197 - Reject consensus votes with more than 64 known-flags. We aren't even
25198 close to that limit yet, and our code doesn't handle it correctly.
25199 Fixes bug 6833; bugfix on 0.2.0.1-alpha.
25200 - Avoid undefined behavior when parsing the list of supported
25201 rendezvous/introduction protocols in a hidden service descriptor.
25202 Previously, Tor would have confused (as-yet-unused) protocol version
25203 numbers greater than 32 with lower ones on many platforms. Fixes
25204 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
25205 - Fix handling of rendezvous client authorization types over 8.
25206 Fixes bug 6861; bugfix on 0.2.1.5-alpha.
25207 - Fix building with older versions of GCC (2.95, for one) that don't
25208 like preprocessor directives inside macro arguments. Found by
25209 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
25210 - Switch weighted node selection rule from using a list of doubles
25211 to using a list of int64_t. This change should make the process
25212 slightly easier to debug and maintain. Needed to finish ticket 6538.
25214 o Code simplification and refactoring:
25215 - Move the generic "config" code into a new file, and have "config.c"
25216 hold only torrc- and state-related code. Resolves ticket 6823.
25217 - Move the core of our "choose a weighted element at random" logic
25218 into its own function, and give it unit tests. Now the logic is
25219 testable, and a little less fragile too.
25220 - Removed the testing_since field of node_t, which hasn't been used
25221 for anything since 0.2.0.9-alpha.
25223 o Documentation fixes:
25224 - Clarify that hidden services are TCP only. Fixes bug 6024.
25225 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
25229 Changes in version 0.2.3.22-rc - 2012-09-11
25230 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
25234 - Fix an assertion failure in tor_timegm() that could be triggered
25235 by a badly formatted directory object. Bug found by fuzzing with
25236 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25239 - Avoid segfault when starting up having run with an extremely old
25240 version of Tor and parsing its state file. Fixes bug 6801; bugfix
25244 Changes in version 0.2.2.39 - 2012-09-11
25245 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
25249 - Fix an assertion failure in tor_timegm() that could be triggered
25250 by a badly formatted directory object. Bug found by fuzzing with
25251 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25252 - Do not crash when comparing an address with port value 0 to an
25253 address policy. This bug could have been used to cause a remote
25254 assertion failure by or against directory authorities, or to
25255 allow some applications to crash clients. Fixes bug 6690; bugfix
25259 Changes in version 0.2.4.2-alpha - 2012-09-10
25260 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
25261 raises the default rate limiting even more, and makes the bootstrapping
25262 log messages less noisy.
25265 - Automatically forward the TCP ports of pluggable transport
25266 proxies using tor-fw-helper if PortForwarding is enabled. Implements
25270 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
25271 to 1GB/1GB. The previous defaults were intended to be "basically
25272 infinite", but it turns out they're now limiting our 100mbit+
25273 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
25274 last time we raised it).
25277 - Detect when we're running with a version of OpenSSL other than the
25278 one we compiled with. This has occasionally given people hard-to-
25280 - Log fewer lines at level "notice" about our OpenSSL and Libevent
25281 versions and capabilities when everything is going right. Resolves
25282 part of ticket 6736.
25283 - Directory authorities no long accept descriptors for any version of
25284 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
25285 These versions are insecure, unsupported, or both. Implements
25289 - Rename the (internal-use-only) UsingTestingNetworkDefaults option
25290 to start with a triple-underscore so the controller won't touch it.
25291 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
25292 - Avoid segfault when starting up having run with an extremely old
25293 version of Tor and parsing its state file. Fixes bug 6801; bugfix
25295 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
25296 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
25297 - Don't follow the NULL pointer if microdescriptor generation fails.
25298 (This does not appear to be triggerable, but it's best to be safe.)
25299 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
25300 - Fix mis-declared dependencies on src/common/crypto.c and
25301 src/or/tor_main.c that could break out-of-tree builds under some
25302 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
25303 - Avoid a warning when building common_sha1.i out of tree. Fixes bug
25304 6778; bugfix on 0.2.4.1-alpha.
25305 - Fix a harmless (in this case) build warning for implicitly
25306 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
25308 o Removed features:
25309 - Now that all versions before 0.2.2.x are disallowed, we no longer
25310 need to work around their missing features. Thus we can remove a
25311 bunch of compatibility code.
25313 o Code refactoring:
25314 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
25315 TCP ports to forward. In the past it only accepted two ports:
25316 the ORPort and the DirPort.
25319 Changes in version 0.2.4.1-alpha - 2012-09-05
25320 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
25321 bridgedb; lets relays use IPv6 addresses and directory authorities
25322 advertise them; and switches to a cleaner build interface.
25324 This is the first alpha release in a new series, so expect there to
25325 be bugs. Users who would rather test out a more stable branch should
25326 stay with 0.2.3.x for now.
25328 o Major features (bridges):
25329 - Bridges now report the pluggable transports they support to the
25330 bridge authority, so it can pass the supported transports on to
25331 bridgedb and/or eventually do reachability testing. Implements
25334 o Major features (IPv6):
25335 - Bridge authorities now accept IPv6 bridge addresses and include
25336 them in network status documents. Implements ticket 5534.
25337 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
25338 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
25339 to happen. Implements ticket 5535.
25340 - All kind of relays, not just bridges, can now advertise an IPv6
25341 OR port. Implements ticket 6362.
25342 - Directory authorities vote on IPv6 OR ports using the new consensus
25343 method 14. Implements ticket 6363.
25345 o Major features (build):
25346 - Switch to a nonrecursive Makefile structure. Now instead of each
25347 Makefile.am invoking other Makefile.am's, there is a master
25348 Makefile.am that includes the others. This change makes our build
25349 process slightly more maintainable, and improves parallelism for
25350 building with make -j. Original patch by Stewart Smith; various
25351 fixes by Jim Meyering.
25352 - Where available, we now use automake's "silent" make rules by
25353 default, so that warnings are easier to spot. You can get the old
25354 behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
25356 o Minor features (code security and spec conformance):
25357 - Clear keys and key-derived material left on the stack in
25358 rendservice.c and rendclient.c. Check return value of
25359 crypto_pk_write_private_key_to_string() in rend_service_load_keys().
25360 These fixes should make us more forward-secure against cold-boot
25361 attacks and the like. Fixes bug 2385.
25362 - Reject EXTEND cells sent to nonexistent streams. According to the
25363 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
25364 we were only checking for stream IDs that were currently in use.
25365 Found while hunting for more instances of bug 6271. Bugfix on
25366 0.0.2pre8, which introduced incremental circuit construction.
25368 o Minor features (streamlining);
25369 - No longer include the "opt" prefix when generating routerinfos
25370 or v2 directories: it has been needless since Tor 0.1.2. Closes
25372 - Remove some now-needless code that tried to aggressively flush
25373 OR connections as data was added to them. Since 0.2.0.1-alpha, our
25374 cell queue logic has saved us from the failure mode that this code
25375 was supposed to prevent. Removing this code will limit the number
25376 of baroque control flow paths through Tor's network logic. Reported
25377 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
25379 o Minor features (controller):
25380 - Add a "GETINFO signal/names" control port command. Implements
25382 - Provide default values for all options via "GETINFO config/defaults".
25383 Implements ticket 4971.
25385 o Minor features (IPv6):
25386 - New config option "AuthDirHasIPv6Connectivity 1" that directory
25387 authorities should set if they have IPv6 connectivity and want to
25388 do reachability tests for IPv6 relays. Implements feature 5974.
25389 - A relay with an IPv6 OR port now sends that address in NETINFO
25390 cells (in addition to its other address). Implements ticket 6364.
25392 o Minor features (log messages):
25393 - Omit the first heartbeat log message, because it never has anything
25394 useful to say, and it clutters up the bootstrapping messages.
25395 Resolves ticket 6758.
25396 - Don't log about reloading the microdescriptor cache at startup. Our
25397 bootstrap warnings are supposed to tell the user when there's a
25398 problem, and our bootstrap notices say when there isn't. Resolves
25399 ticket 6759; bugfix on 0.2.2.6-alpha.
25400 - Don't log "I learned some more directory information" when we're
25401 reading cached directory information. Reserve it for when new
25402 directory information arrives in response to a fetch. Resolves
25404 - Prevent rounding error in path bias counts when scaling
25405 them down, and use the correct scale factor default. Also demote
25406 some path bias related log messages down a level and make others
25407 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
25408 - We no longer warn so much when generating manpages from their
25411 o Code simplifications and refactoring:
25412 - Enhance our internal sscanf replacement so that we can eliminate
25413 the last remaining uses of the system sscanf. (Though those uses
25414 of sscanf were safe, sscanf itself is generally error prone, so
25415 we want to eliminate when we can.) Fixes ticket 4195 and Coverity
25417 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
25418 - Move last_reachable and testing_since from routerinfo_t to node_t.
25419 Implements ticket 5529.
25420 - Add replaycache_t structure, functions and unit tests, then refactor
25421 rend_service_introduce() to be more clear to read, improve, debug,
25422 and test. Resolves bug 6177.
25423 - Finally remove support for malloc_good_size and malloc_usable_size.
25424 We had hoped that these functions would let us eke a little more
25425 memory out of our malloc implementation. Unfortunately, the only
25426 implementations that provided these functions are also ones that
25427 are already efficient about not overallocation: they never got us
25428 more than 7 or so bytes per allocation. Removing them saves us a
25429 little code complexity and a nontrivial amount of build complexity.
25431 o New requirements:
25432 - Tor maintainers now require Automake version 1.9 or later to build
25433 Tor from the Git repository. (Automake is not required when building
25434 from a source distribution.)
25437 Changes in version 0.2.3.21-rc - 2012-09-05
25438 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
25439 series. It fixes a trio of potential security bugs, fixes a bug where
25440 we were leaving some of the fast relays out of the microdescriptor
25441 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
25442 and cleans up other smaller issues.
25444 o Major bugfixes (security):
25445 - Tear down the circuit if we get an unexpected SENDME cell. Clients
25446 could use this trick to make their circuits receive cells faster
25447 than our flow control would have allowed, or to gum up the network,
25448 or possibly to do targeted memory denial-of-service attacks on
25449 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
25450 from July 2002, before the release of Tor 0.0.0. We had committed
25451 this patch previously, but we had to revert it because of bug 6271.
25452 Now that 6271 is fixed, this patch appears to work.
25453 - Reject any attempt to extend to an internal address. Without
25454 this fix, a router could be used to probe addresses on an internal
25455 network to see whether they were accepting connections. Fixes bug
25456 6710; bugfix on 0.0.8pre1.
25457 - Do not crash when comparing an address with port value 0 to an
25458 address policy. This bug could have been used to cause a remote
25459 assertion failure by or against directory authorities, or to
25460 allow some applications to crash clients. Fixes bug 6690; bugfix
25464 - Remove the upper bound on microdescriptor length. We were hitting
25465 the limit for routers with complex exit policies or family
25466 declarations, causing clients to not use them. Fixes the first
25467 piece of bug 6404; fix on 0.2.2.6-alpha.
25468 - Detect "ORPort 0" as meaning, uniformly, that we're not running
25469 as a relay. Previously, some of our code would treat the presence
25470 of any ORPort line as meaning that we should act like a relay,
25471 even though our new listener code would correctly not open any
25472 ORPorts for ORPort 0. Similar bugs in other Port options are also
25473 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
25476 - Avoid a pair of double-free and use-after-mark bugs that can
25477 occur with certain timings in canceled and re-received DNS
25478 requests. Fixes bug 6472; bugfix on 0.0.7rc1.
25479 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
25480 Fixes bug 6379. Bugfix on 0.2.0.20-rc.
25481 - Allow one-hop directory fetching circuits the full "circuit build
25482 timeout" period, rather than just half of it, before failing them
25483 and marking the relay down. This fix should help reduce cases where
25484 clients declare relays (or worse, bridges) unreachable because
25485 the TLS handshake takes a few seconds to complete. Fixes bug 6743;
25486 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
25488 - Authorities no longer include any router in their microdescriptor
25489 consensuses for which they couldn't generate or agree on a
25490 microdescriptor. Fixes the second piece of bug 6404; fix on
25492 - Detect and reject attempts to specify both "FooPort" and
25493 "FooPort 0" in the same configuration domain. (It's still okay
25494 to have a FooPort in your configuration file, and use "FooPort 0"
25495 on the command line to disable it.) Fixes the second half of bug
25496 6507; bugfix on 0.2.3.3-alpha.
25497 - Make wildcarded addresses (that is, ones beginning with "*.") work
25498 when provided via the controller's MapAddress command. Previously,
25499 they were accepted, but we never actually noticed that they were
25500 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
25501 - Avoid crashing on a malformed state file where EntryGuardPathBias
25502 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
25503 - Add a (probably redundant) memory clear between iterations of
25504 the router status voting loop, to prevent future coding errors
25505 where data might leak between iterations of the loop. Resolves
25508 o Minor bugfixes (log messages):
25509 - Downgrade "set buildtimeout to low value" messages to "info"
25510 severity; they were never an actual problem, there was never
25511 anything reasonable to do about them, and they tended to spam logs
25512 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
25513 - Downgrade path-bias warning messages to "info". We'll try to get
25514 them working better in 0.2.4. Add internal circuit construction
25515 state to protect against the noisy warn message "Unexpectedly high
25516 circuit_successes". Also add some additional rate-limited notice
25517 messages to help determine the root cause of the warn. Fixes bug
25518 6475. Bugfix against 0.2.3.17-beta.
25519 - Move log message when unable to find a microdesc in a routerstatus
25520 entry to parse time. Previously we'd spam this warning every time
25521 we tried to figure out which microdescriptors to download. Fixes
25522 the third piece of bug 6404; fix on 0.2.3.18-rc.
25525 - Consider new, removed or changed IPv6 OR ports a non-cosmetic
25526 change when the authority is deciding whether to accept a newly
25527 uploaded descriptor. Implements ticket 6423.
25528 - Add missing documentation for consensus and microdesc files.
25529 Resolves ticket 6732.
25532 Changes in version 0.2.2.38 - 2012-08-12
25533 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
25534 attack that could in theory leak path information.
25537 - Avoid an uninitialized memory read when reading a vote or consensus
25538 document that has an unrecognized flavor name. This read could
25539 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
25540 - Try to leak less information about what relays a client is
25541 choosing to a side-channel attacker. Previously, a Tor client would
25542 stop iterating through the list of available relays as soon as it
25543 had chosen one, thus finishing a little earlier when it picked
25544 a router earlier in the list. If an attacker can recover this
25545 timing information (nontrivial but not proven to be impossible),
25546 they could learn some coarse-grained information about which relays
25547 a client was picking (middle nodes in particular are likelier to
25548 be affected than exits). The timing attack might be mitigated by
25549 other factors (see bug 6537 for some discussion), but it's best
25550 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
25553 Changes in version 0.2.3.20-rc - 2012-08-05
25554 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
25555 series. It fixes a pair of code security bugs and a potential anonymity
25556 issue, updates our RPM spec files, and cleans up other smaller issues.
25559 - Avoid read-from-freed-memory and double-free bugs that could occur
25560 when a DNS request fails while launching it. Fixes bug 6480;
25561 bugfix on 0.2.0.1-alpha.
25562 - Avoid an uninitialized memory read when reading a vote or consensus
25563 document that has an unrecognized flavor name. This read could
25564 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
25565 - Try to leak less information about what relays a client is
25566 choosing to a side-channel attacker. Previously, a Tor client would
25567 stop iterating through the list of available relays as soon as it
25568 had chosen one, thus finishing a little earlier when it picked
25569 a router earlier in the list. If an attacker can recover this
25570 timing information (nontrivial but not proven to be impossible),
25571 they could learn some coarse-grained information about which relays
25572 a client was picking (middle nodes in particular are likelier to
25573 be affected than exits). The timing attack might be mitigated by
25574 other factors (see bug 6537 for some discussion), but it's best
25575 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
25578 - Try to make the warning when giving an obsolete SOCKSListenAddress
25579 a little more useful.
25580 - Terminate active server managed proxies if Tor stops being a
25581 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
25582 - Provide a better error message about possible OSX Asciidoc failure
25583 reasons. Fixes bug 6436.
25584 - Warn when Tor is configured to use accounting in a way that can
25585 link a hidden service to some other hidden service or public
25586 address. Resolves ticket 6490.
25589 - Check return value of fputs() when writing authority certificate
25590 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
25591 - Ignore ServerTransportPlugin lines when Tor is not configured as
25592 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
25593 - When disabling guards for having too high a proportion of failed
25594 circuits, make sure to look at each guard. Fixes bug 6397; bugfix
25598 - Update our default RPM spec files to work with mock and rpmbuild
25599 on RHEL/Fedora. They have an updated set of dependencies and
25600 conflicts, a fix for an ancient typo when creating the "_tor"
25601 user, and better instructions. Thanks to Ondrej Mikle for the
25602 patch series. Fixes bug 6043.
25605 - Make it possible to set the TestingTorNetwork configuration
25606 option using AlternateDirAuthority and AlternateBridgeAuthority
25607 as an alternative to setting DirServer. Addresses ticket 6377.
25610 - Clarify the documentation for the Alternate*Authority options.
25612 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
25614 o Code simplification and refactoring:
25615 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
25616 10 lines. Also, don't nest them. Doing so in the past has
25617 led to hard-to-debug code. The new style is to use the
25618 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
25621 Changes in version 0.2.3.19-rc - 2012-07-06
25622 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
25623 series. It fixes the compile on Windows, reverts to a GeoIP database
25624 that isn't as broken, and fixes a flow control bug that has been around
25625 since the beginning of Tor.
25628 - Fix a bug handling SENDME cells on nonexistent streams that could
25629 result in bizarre window values. Report and patch contributed
25630 pseudonymously. Fixes part of bug 6271. This bug was introduced
25631 before the first Tor release, in svn commit r152.
25632 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
25633 June 2012 database, Maxmind marked many Tor relays as country "A1",
25634 which will cause risky behavior for clients that set EntryNodes
25635 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
25636 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
25637 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
25640 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
25641 bugfix on 0.2.1.10-alpha.
25644 Changes in version 0.2.3.18-rc - 2012-06-28
25645 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
25646 series. It fixes a few smaller bugs, but generally appears stable.
25647 Please test it and let us know whether it is!
25650 - Allow wildcarded mapaddress targets to be specified on the
25651 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
25652 - Make our linker option detection code more robust against linkers
25653 such as on FreeBSD 8, where a bad combination of options completes
25654 successfully but makes an unrunnable binary. Fixes bug 6173;
25655 bugfix on 0.2.3.17-beta.
25657 o Minor bugfixes (on 0.2.2.x and earlier):
25658 - Avoid a false positive in the util/threads unit test by increasing
25659 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
25660 - Replace "Sending publish request" log messages with "Launching
25661 upload", so that they no longer confusingly imply that we're
25662 sending something to a directory we might not even be connected
25663 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
25664 - Make sure to set *socket_error in all error cases in
25665 connection_connect(), so it can't produce a warning about
25666 errno being zero from errno_to_orconn_end_reason(). Bugfix on
25667 0.2.1.1-alpha; resolves ticket 6028.
25668 - Downgrade "Got a certificate, but we already have it" log messages
25669 from warning to info, except when we're a dirauth. Fixes bug 5238;
25670 bugfix on 0.2.1.7-alpha.
25671 - When checking for requested signatures on the latest consensus
25672 before serving it to a client, make sure to check the right
25673 consensus flavor. Bugfix on 0.2.2.6-alpha.
25674 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
25675 Fixes bug 5932; bugfix on 0.2.2.7-alpha.
25677 o Minor bugfixes (on 0.2.3.x):
25678 - Make format_helper_exit_status() avoid unnecessary space padding
25679 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
25681 - Downgrade a message about cleaning the microdescriptor cache to
25682 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
25683 - Log a BUG message at severity INFO if we have a networkstatus with
25684 a missing entry for some microdescriptor. Continues on a patch
25686 - Improve the log message when a managed proxy fails to launch. Fixes
25687 bug 5099; bugfix on 0.2.3.6-alpha.
25688 - Don't do DNS lookups when parsing corrupted managed proxy protocol
25689 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
25690 - When formatting wildcarded address mappings for the controller,
25691 be sure to include "*." as appropriate. Partially fixes bug 6244;
25692 bugfix on 0.2.3.9-alpha.
25693 - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
25694 Bugfix on 0.2.3.13-alpha.
25695 - Stop logging messages about running with circuit timeout learning
25696 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
25697 - Disable a spurious warning about reading on a marked and flushing
25698 connection. We shouldn't be doing that, but apparently we
25699 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
25700 - Fix a bug that stopped AllowDotExit from working on addresses
25701 that had an entry in the DNS cache. Fixes bug 6211; bugfix on
25704 o Code simplification, refactoring, unit tests:
25705 - Move tor_gettimeofday_cached() into compat_libevent.c, and use
25706 Libevent's notion of cached time when possible.
25707 - Remove duplicate code for invoking getrlimit() from control.c.
25708 - Add a unit test for the environment_variable_names_equal function.
25711 - Document the --defaults-torrc option, and the new (in 0.2.3)
25712 semantics for overriding, extending, and clearing lists of
25713 options. Closes bug 4748.
25716 Changes in version 0.2.3.17-beta - 2012-06-15
25717 Tor 0.2.3.17-beta enables compiler and linker hardening by default,
25718 gets our TLS handshake back on track for being able to blend in with
25719 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
25720 with Vidalia, and otherwise continues to get us closer to a release
25724 - Enable gcc and ld hardening by default. Resolves ticket 5210.
25725 - Update TLS cipher list to match Firefox 8 and later. Resolves
25727 - Implement the client side of proposal 198: remove support for
25728 clients falsely claiming to support standard ciphersuites that
25729 they can actually provide. As of modern OpenSSL versions, it's not
25730 necessary to fake any standard ciphersuite, and doing so prevents
25731 us from using better ciphersuites in the future, since servers
25732 can't know whether an advertised ciphersuite is really supported or
25733 not. Some hosts -- notably, ones with very old versions of OpenSSL
25734 or where OpenSSL has been built with ECC disabled -- will stand
25735 out because of this change; TBB users should not be affected.
25738 - Change the default value for DynamicDHGroups (introduced in
25739 0.2.3.9-alpha) to 0. This feature can make Tor relays less
25740 identifiable by their use of the mod_ssl DH group, but at
25741 the cost of some usability (#4721) and bridge tracing (#6087)
25742 regressions. Resolves ticket 5598.
25743 - Send a CRLF at the end of each STATUS_* control protocol event. This
25744 bug tickled a bug in Vidalia which would make it freeze. Fixes
25745 bug 6094; bugfix on 0.2.3.16-alpha.
25748 - Disable writing on marked-for-close connections when they are
25749 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
25750 bug 5263; bugfix on 0.0.2pre13, where we first added a special
25751 case for flushing marked connections.
25752 - Detect SSL handshake even when the initial attempt to write the
25753 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
25754 - Change the AllowDotExit rules so they should actually work.
25755 We now enforce AllowDotExit only immediately after receiving an
25756 address via SOCKS or DNSPort: other sources are free to provide
25757 .exit addresses after the resolution occurs. Fixes bug 3940;
25758 bugfix on 0.2.2.1-alpha.
25759 - Fix a (harmless) integer overflow in cell statistics reported by
25760 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
25761 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
25762 right places and never depends on the consensus parameters or
25763 computes adaptive timeouts when it is disabled. Fixes bug 5049;
25764 bugfix on 0.2.2.14-alpha.
25765 - When building Tor on Windows with -DUNICODE (not default), ensure
25766 that error messages, filenames, and DNS server names are always
25767 NUL-terminated when we convert them to a single-byte encoding.
25768 Fixes bug 5909; bugfix on 0.2.2.16-alpha.
25769 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
25770 Fixes bug 6097; bugfix on 0.2.2.16-alpha.
25771 - Fix an edge case where TestingTorNetwork is set but the authorities
25772 and relays all have an uptime of zero, where the private Tor network
25773 could briefly lack support for hidden services. Fixes bug 3886;
25774 bugfix on 0.2.2.18-alpha.
25775 - Correct the manpage's descriptions for the default values of
25776 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
25778 - Fix the documentation for the --hush and --quiet command line
25779 options, which changed their behavior back in 0.2.3.3-alpha.
25780 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
25784 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
25785 more information to it, so that we can track it down in case it
25786 returns again. Mitigates bug 5235.
25787 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
25788 options_validate(); warn if LearnCircuitBuildTimeout is disabled and
25789 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
25790 - Warn the user when HTTPProxy, but no other proxy type, is
25791 configured. This can cause surprising behavior: it doesn't send
25792 all of Tor's traffic over the HTTPProxy -- it sends unencrypted
25793 directory traffic only. Resolves ticket 4663.
25794 - Issue a notice if a guard completes less than 40% of your circuits.
25795 Threshold is configurable by torrc option PathBiasNoticeRate and
25796 consensus parameter pb_noticepct. There is additional, off-by-
25797 default code to disable guards which fail too many circuits.
25798 Addresses ticket 5458.
25799 - Update to the June 6 2012 Maxmind GeoLite Country database.
25801 o Code simplifications and refactoring:
25802 - Remove validate_pluggable_transports_config(): its warning
25803 message is now handled by connection_or_connect().
25806 Changes in version 0.2.2.37 - 2012-06-06
25807 Tor 0.2.2.37 introduces a workaround for a critical renegotiation
25808 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
25812 - Work around a bug in OpenSSL that broke renegotiation with TLS
25813 1.1 and TLS 1.2. Without this workaround, all attempts to speak
25814 the v2 Tor connection protocol when both sides were using OpenSSL
25815 1.0.1 would fail. Resolves ticket 6033.
25816 - When waiting for a client to renegotiate, don't allow it to add
25817 any bytes to the input buffer. This fixes a potential DoS issue.
25818 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
25819 - Fix an edge case where if we fetch or publish a hidden service
25820 descriptor, we might build a 4-hop circuit and then use that circuit
25821 for exiting afterwards -- even if the new last hop doesn't obey our
25822 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
25825 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
25826 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
25829 - Tell GCC and Clang to check for any errors in format strings passed
25830 to the tor_v*(print|scan)f functions.
25833 Changes in version 0.2.3.16-alpha - 2012-06-05
25834 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
25835 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
25836 currently). It also fixes a variety of smaller bugs and other cleanups
25837 that get us closer to a release candidate.
25839 o Major bugfixes (general):
25840 - Work around a bug in OpenSSL that broke renegotiation with TLS
25841 1.1 and TLS 1.2. Without this workaround, all attempts to speak
25842 the v2 Tor connection protocol when both sides were using OpenSSL
25843 1.0.1 would fail. Resolves ticket 6033.
25844 - When waiting for a client to renegotiate, don't allow it to add
25845 any bytes to the input buffer. This fixes a potential DoS issue.
25846 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
25847 - Pass correct OR address to managed proxies (like obfsproxy),
25848 even when ORListenAddress is used. Fixes bug 4865; bugfix on
25850 - The advertised platform of a router now includes only its operating
25851 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
25852 service pack level (for Windows) or its CPU architecture (for Unix).
25853 We also no longer include the "git-XYZ" tag in the version. Resolves
25856 o Major bugfixes (clients):
25857 - If we are unable to find any exit that supports our predicted ports,
25858 stop calling them predicted, so that we don't loop and build
25859 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
25860 which introduced predicted ports.
25861 - Fix an edge case where if we fetch or publish a hidden service
25862 descriptor, we might build a 4-hop circuit and then use that circuit
25863 for exiting afterwards -- even if the new last hop doesn't obey our
25864 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
25865 - Check at each new consensus whether our entry guards were picked
25866 long enough ago that we should rotate them. Previously, we only
25867 did this check at startup, which could lead to us holding a guard
25868 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
25869 - When fetching a bridge descriptor from a bridge authority,
25870 always do so anonymously, whether we have been able to open
25871 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
25872 This behavior makes it *safer* to use UpdateBridgesFromAuthority,
25873 but we'll need to wait for bug 6010 before it's actually usable.
25875 o Major bugfixes (directory authorities):
25876 - When computing weight parameters, behave more robustly in the
25877 presence of a bad bwweightscale value. Previously, the authorities
25878 would crash if they agreed on a sufficiently broken weight_scale
25879 value: now, they use a reasonable default and carry on. Partial
25880 fix for 5786; bugfix on 0.2.2.17-alpha.
25881 - Check more thoroughly to prevent a rogue authority from
25882 double-voting on any consensus directory parameter. Previously,
25883 authorities would crash in this case if the total number of
25884 votes for any parameter exceeded the number of active voters,
25885 but would let it pass otherwise. Partial fix for bug 5786; bugfix
25889 - Rate-limit log messages when asked to connect anonymously to
25890 a private address. When these hit, they tended to hit fast and
25891 often. Also, don't bother trying to connect to addresses that we
25892 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
25893 reply makes us think we have been lied to, even when the address the
25894 client tried to connect to was "localhost." Resolves ticket 2822.
25895 - Allow packagers to insert an extra string in server descriptor
25896 platform lines by setting the preprocessor variable TOR_BUILD_TAG.
25897 Resolves the rest of ticket 2988.
25898 - Raise the threshold of server descriptors needed (75%) and exit
25899 server descriptors needed (50%) before we will declare ourselves
25900 bootstrapped. This will make clients start building circuits a
25901 little later, but makes the initially constructed circuits less
25902 skewed and less in conflict with further directory fetches. Fixes
25904 - Close any connection that sends unrecognized junk before the
25905 handshake. Solves an issue noted in bug 4369.
25906 - Improve log messages about managed transports. Resolves ticket 5070.
25907 - Tag a bridge's descriptor as "never to be sent unencrypted".
25908 This shouldn't matter, since bridges don't open non-anonymous
25909 connections to the bridge authority and don't allow unencrypted
25910 directory connections from clients, but we might as well make
25911 sure. Closes bug 5139.
25912 - Expose our view of whether we have gone dormant to the controller,
25913 via a new "GETINFO dormant" value. Torbutton and other controllers
25914 can use this to avoid doing periodic requests through Tor while
25915 it's dormant (bug 4718). Fixes bug 5954.
25916 - Tell GCC and Clang to check for any errors in format strings passed
25917 to the tor_v*(print|scan)f functions.
25918 - Update to the May 1 2012 Maxmind GeoLite Country database.
25920 o Minor bugfixes (already included in 0.2.2.36):
25921 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
25922 Fixes bug 5346; bugfix on 0.0.8pre3.
25923 - Correct parsing of certain date types in parse_http_time().
25924 Without this patch, If-Modified-Since would behave
25925 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
25926 Esteban Manchado Velázques.
25927 - Make our number-parsing functions always treat too-large values
25928 as an error, even when those values exceed the width of the
25929 underlying type. Previously, if the caller provided these
25930 functions with minima or maxima set to the extreme values of the
25931 underlying integer type, these functions would return those
25932 values on overflow rather than treating overflow as an error.
25933 Fixes part of bug 5786; bugfix on 0.0.9.
25934 - If we hit the error case where routerlist_insert() replaces an
25935 existing (old) server descriptor, make sure to remove that
25936 server descriptor from the old_routers list. Fix related to bug
25937 1776. Bugfix on 0.2.2.18-alpha.
25938 - Clarify the behavior of MaxCircuitDirtiness with hidden service
25939 circuits. Fixes issue 5259.
25941 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
25942 - Prevent a null-pointer dereference when receiving a data cell
25943 for a nonexistent stream when the circuit in question has an
25944 empty deliver window. We don't believe this is triggerable,
25945 since we don't currently allow deliver windows to become empty,
25946 but the logic is tricky enough that it's better to make the code
25947 robust. Fixes bug 5541; bugfix on 0.0.2pre14.
25948 - Fix a memory leak when trying to launch a DNS request when the
25949 network is disabled or the nameservers are unconfigurable. Fixes
25950 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
25951 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
25952 - Don't hold a Windows file handle open for every file mapping;
25953 the file mapping handle is sufficient. Fixes bug 5951; bugfix on
25955 - Avoid O(n^2) performance characteristics when parsing a large
25956 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
25957 - Format more doubles with %f, not %lf. Patch from grarpamp to make
25958 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
25960 - Make our replacement implementation of strtok_r() compatible with
25961 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
25962 bugfix on 0.2.2.1-alpha.
25963 - Fix a NULL-pointer dereference on a badly formed
25964 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
25965 bugfix on 0.2.2.9-alpha.
25966 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
25967 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
25968 - Defensively refactor rend_mid_rendezvous() so that protocol
25969 violations and length checks happen in the beginning. Fixes
25971 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
25972 that IPv6 stuff will compile on MSVC, and compilation issues
25973 will be easier to track down. Fixes bug 5861.
25975 o Minor bugfixes (correctness, on 0.2.2.x and earlier):
25976 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
25977 resource exhaustion, so that clients can adjust their load to
25978 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
25979 started using END_STREAM_REASON_RESOURCELIMIT.
25980 - Don't check for whether the address we're using for outbound
25981 connections has changed until after the outbound connection has
25982 completed. On Windows, getsockname() doesn't succeed until the
25983 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
25984 - If the configuration tries to set MyFamily on a bridge, refuse to
25985 do so, and warn about the security implications. Fixes bug 4657;
25986 bugfix on 0.2.0.3-alpha.
25987 - If the client fails to set a reasonable set of ciphersuites
25988 during its v2 handshake renegotiation, allow the renegotiation to
25989 continue nevertheless (i.e. send all the required certificates).
25990 Fixes bug 4591; bugfix on 0.2.0.20-rc.
25991 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
25992 option is set to 0 (which Vidalia version 0.2.16 now does when
25993 a SAVECONF attempt fails), perform other actions that SIGHUP
25994 usually causes (like reopening the logs). Fixes bug 5095; bugfix
25996 - If we fail to write a microdescriptor to the disk cache, do not
25997 continue replacing the old microdescriptor file. Fixes bug 2954;
25998 bugfix on 0.2.2.6-alpha.
25999 - Exit nodes don't need to fetch certificates for authorities that
26000 they don't recognize; only directory authorities, bridges,
26001 and caches need to do that. Fixes part of bug 2297; bugfix on
26003 - Correctly handle checking the permissions on the parent
26004 directory of a control socket in the root directory. Bug found
26005 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
26007 - When told to add a bridge with the same digest as a preexisting
26008 bridge but a different addr:port, change the addr:port as
26009 requested. Previously we would not notice the change. Fixes half
26010 of bug 5603; fix on 0.2.2.26-beta.
26011 - End AUTHCHALLENGE error messages (in the control protocol) with
26012 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
26014 o Minor bugfixes (on 0.2.3.x):
26015 - Turn an assertion (that the number of handshakes received as a
26016 server is not < 1) into a warning. Fixes bug 4873; bugfix on
26018 - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
26019 we had reversed them when the answer was cached.) Fixes bug
26020 5723; bugfix on 0.2.3.1-alpha.
26021 - Work correctly on Linux systems with accept4 support advertised in
26022 their headers, but without accept4 support in the kernel. Fix
26023 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
26024 - When told to add a bridge with the same addr:port as a preexisting
26025 bridge but a different transport, change the transport as
26026 requested. Previously we would not notice the change. Fixes half
26027 of bug 5603; fix on 0.2.3.2-alpha.
26028 - Avoid a "double-reply" warning when replying to a SOCKS request
26029 with a parse error. Patch from Fabian Keil. Fixes bug 4108;
26030 bugfix on 0.2.3.4-alpha.
26031 - Fix a bug where a bridge authority crashes if it has seen no
26032 directory requests when it's time to write statistics to disk.
26033 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
26035 - Don't try to open non-control listeners when DisableNetwork is set.
26036 Previously, we'd open all listeners, then immediately close them.
26037 Fixes bug 5604; bugfix on 0.2.3.9-alpha.
26038 - Don't abort the managed proxy protocol if the managed proxy
26039 sends us an unrecognized line; ignore it instead. Fixes bug
26040 5910; bugfix on 0.2.3.9-alpha.
26041 - Fix a compile warning in crypto.c when compiling with clang 3.1.
26042 Fixes bug 5969, bugfix on 0.2.3.9-alpha.
26043 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
26044 Fixes bug 5355; bugfix on 0.2.3.11-alpha.
26045 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
26046 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
26047 - Resolve numerous small warnings and build issues with MSVC. Resolves
26050 o Documentation fixes:
26051 - Improve the manual's documentation for the NT Service command-line
26052 options. Addresses ticket 3964.
26053 - Clarify SessionGroup documentation slightly; resolves ticket 5437.
26054 - Document the changes to the ORPort and DirPort options, and the
26055 fact that {OR/Dir}ListenAddress is now unnecessary (and
26056 therefore deprecated). Resolves ticket 5597.
26059 - Remove the torrc.bridge file: we don't use it for anything, and
26060 it had become badly desynchronized from torrc.sample. Resolves
26064 Changes in version 0.2.2.36 - 2012-05-24
26065 Tor 0.2.2.36 updates the addresses for two of the eight directory
26066 authorities, fixes some potential anonymity and security issues,
26067 and fixes several crash bugs.
26069 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
26070 known flaws, and nobody should be using them. You should upgrade. If
26071 you're using a Linux or BSD and its packages are obsolete, stop using
26072 those packages and upgrade anyway.
26074 o Directory authority changes:
26075 - Change IP address for maatuska (v3 directory authority).
26076 - Change IP address for ides (v3 directory authority), and rename
26080 - When building or running with any version of OpenSSL earlier
26081 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
26082 versions have a bug (CVE-2011-4576) in which their block cipher
26083 padding includes uninitialized data, potentially leaking sensitive
26084 information to any peer with whom they make a SSLv3 connection. Tor
26085 does not use SSL v3 by default, but a hostile client or server
26086 could force an SSLv3 connection in order to gain information that
26087 they shouldn't have been able to get. The best solution here is to
26088 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
26089 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
26090 to make sure that the bug can't happen.
26091 - Never use a bridge or a controller-supplied node as an exit, even
26092 if its exit policy allows it. Found by wanoskarnet. Fixes bug
26093 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
26094 and 0.2.0.3-alpha (for bridge-purpose descriptors).
26095 - Only build circuits if we have a sufficient threshold of the total
26096 descriptors that are marked in the consensus with the "Exit"
26097 flag. This mitigates an attack proposed by wanoskarnet, in which
26098 all of a client's bridges collude to restrict the exit nodes that
26099 the client knows about. Fixes bug 5343.
26100 - Provide controllers with a safer way to implement the cookie
26101 authentication mechanism. With the old method, if another locally
26102 running program could convince a controller that it was the Tor
26103 process, then that program could trick the controller into telling
26104 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
26105 authentication method uses a challenge-response approach to prevent
26106 this attack. Fixes bug 5185; implements proposal 193.
26109 - Avoid logging uninitialized data when unable to decode a hidden
26110 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
26111 - Avoid a client-side assertion failure when receiving an INTRODUCE2
26112 cell on a general purpose circuit. Fixes bug 5644; bugfix on
26114 - Fix builds when the path to sed, openssl, or sha1sum contains
26115 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
26117 - Correct our replacements for the timeradd() and timersub() functions
26118 on platforms that lack them (for example, Windows). The timersub()
26119 function is used when expiring circuits, while timeradd() is
26120 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
26121 bugfix on 0.2.2.24-alpha.
26122 - Fix the SOCKET_OK test that we use to tell when socket
26123 creation fails so that it works on Win64. Fixes part of bug 4533;
26124 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
26127 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
26128 Fixes bug 5346; bugfix on 0.0.8pre3.
26129 - Make our number-parsing functions always treat too-large values
26130 as an error, even when those values exceed the width of the
26131 underlying type. Previously, if the caller provided these
26132 functions with minima or maxima set to the extreme values of the
26133 underlying integer type, these functions would return those
26134 values on overflow rather than treating overflow as an error.
26135 Fixes part of bug 5786; bugfix on 0.0.9.
26136 - Older Linux kernels erroneously respond to strange nmap behavior
26137 by having accept() return successfully with a zero-length
26138 socket. When this happens, just close the connection. Previously,
26139 we would try harder to learn the remote address: but there was
26140 no such remote address to learn, and our method for trying to
26141 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
26142 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
26143 - Correct parsing of certain date types in parse_http_time().
26144 Without this patch, If-Modified-Since would behave
26145 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
26146 Esteban Manchado Velázques.
26147 - Change the BridgePassword feature (part of the "bridge community"
26148 design, which is not yet implemented) to use a time-independent
26149 comparison. The old behavior might have allowed an adversary
26150 to use timing to guess the BridgePassword value. Fixes bug 5543;
26151 bugfix on 0.2.0.14-alpha.
26152 - Detect and reject certain misformed escape sequences in
26153 configuration values. Previously, these values would cause us
26154 to crash if received in a torrc file or over an authenticated
26155 control port. Bug found by Esteban Manchado Velázquez, and
26156 independently by Robert Connolly from Matta Consulting who further
26157 noted that it allows a post-authentication heap overflow. Patch
26158 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
26159 bugfix on 0.2.0.16-alpha.
26160 - Fix a compile warning when using the --enable-openbsd-malloc
26161 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
26162 - During configure, detect when we're building with clang version
26163 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
26164 CFLAGS. clang doesn't support them yet.
26165 - When sending an HTTP/1.1 proxy request, include a Host header.
26166 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
26167 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
26168 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
26169 - If we hit the error case where routerlist_insert() replaces an
26170 existing (old) server descriptor, make sure to remove that
26171 server descriptor from the old_routers list. Fix related to bug
26172 1776. Bugfix on 0.2.2.18-alpha.
26174 o Minor bugfixes (documentation and log messages):
26175 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
26176 Fixes bug 4856; bugfix on Tor 0.0.6.
26177 - Update "ClientOnly" man page entry to explain that there isn't
26178 really any point to messing with it. Resolves ticket 5005.
26179 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
26180 directory authority option (introduced in Tor 0.2.2.34).
26181 - Downgrade the "We're missing a certificate" message from notice
26182 to info: people kept mistaking it for a real problem, whereas it
26183 is seldom the problem even when we are failing to bootstrap. Fixes
26184 bug 5067; bugfix on 0.2.0.10-alpha.
26185 - Correctly spell "connect" in a log message on failure to create a
26186 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
26187 - Clarify the behavior of MaxCircuitDirtiness with hidden service
26188 circuits. Fixes issue 5259.
26191 - Directory authorities now reject versions of Tor older than
26192 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
26193 inclusive. These versions accounted for only a small fraction of
26194 the Tor network, and have numerous known security issues. Resolves
26196 - Update to the May 1 2012 Maxmind GeoLite Country database.
26199 - When sending or relaying a RELAY_EARLY cell, we used to convert
26200 it to a RELAY cell if the connection was using the v1 link
26201 protocol. This was a workaround for older versions of Tor, which
26202 didn't handle RELAY_EARLY cells properly. Now that all supported
26203 versions can handle RELAY_EARLY cells, and now that we're enforcing
26204 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
26205 remove this workaround. Addresses bug 4786.
26208 Changes in version 0.2.3.15-alpha - 2012-04-30
26209 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
26210 the development branch build on Windows again.
26212 o Minor bugfixes (on 0.2.2.x and earlier):
26213 - Make sure that there are no unhandled pending TLS errors before
26214 reading from a TLS stream. We had checks in 0.1.0.3-rc, but
26215 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
26216 Bugfix on 0.1.0.5-rc; fixes bug 4528.
26217 - Fix an assert that directory authorities could trigger on sighup
26218 during some configuration state transitions. We now don't treat
26219 it as a fatal error when the new descriptor we just generated in
26220 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
26221 - After we pick a directory mirror, we would refuse to use it if
26222 it's in our ExcludeExitNodes list, resulting in mysterious failures
26223 to bootstrap for people who just wanted to avoid exiting from
26224 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
26225 - When building with --enable-static-tor on OpenBSD, do not
26226 erroneously attempt to link -lrt. Fixes bug 5103.
26228 o Minor bugfixes (on 0.2.3.x):
26229 - When Tor is built with kernel headers from a recent (last few
26230 years) Linux kernel, do not fail to run on older (pre-2.6.28
26231 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
26232 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
26233 and 0.2.3.12-alpha.
26234 - Fix compilation with miniupnpc version 1.6; patch from
26235 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
26236 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
26237 on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
26238 - Fix compilation on platforms without unistd.h, or where environ
26239 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
26242 - Directory authorities are now a little more lenient at accepting
26243 older router descriptors, or newer router descriptors that don't
26244 make big changes. This should help ameliorate past and future
26245 issues where routers think they have uploaded valid descriptors,
26246 but the authorities don't think so. Fix for ticket 2479.
26247 - Make the code that clients use to detect an address change be
26248 IPv6-aware, so that it won't fill clients' logs with error
26249 messages when trying to get the IPv4 address of an IPv6
26250 connection. Implements ticket 5537.
26252 o Removed features:
26253 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
26254 authorities needed to use it for a while to keep the network working
26255 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
26256 that was six months ago. As of now, it should no longer be needed
26260 Changes in version 0.2.3.14-alpha - 2012-04-23
26261 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
26262 candidate. It also dramatically speeds up AES: fast relays should
26263 consider switching to the newer OpenSSL library.
26265 o Directory authority changes:
26266 - Change IP address for ides (v3 directory authority), and rename
26270 - Avoid logging uninitialized data when unable to decode a hidden
26271 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
26272 - Avoid a client-side assertion failure when receiving an INTRODUCE2
26273 cell on a general purpose circuit. Fixes bug 5644; bugfix on
26275 - If authorities are unable to get a v2 consensus document from other
26276 directory authorities, they no longer fall back to fetching
26277 them from regular directory caches. Fixes bug 5635; bugfix on
26278 0.2.2.26-beta, where routers stopped downloading v2 consensus
26279 documents entirely.
26280 - When we start a Tor client with a normal consensus already cached,
26281 be willing to download a microdescriptor consensus. Fixes bug 4011;
26282 fix on 0.2.3.1-alpha.
26284 o Major features (performance):
26285 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
26286 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
26287 vectorized AES implementations as appropriate. These can be much,
26288 much faster than other AES implementations.
26290 o Minor bugfixes (0.2.2.x and earlier):
26291 - Don't launch more than 10 service-side introduction-point circuits
26292 for a hidden service in five minutes. Previously, we would consider
26293 launching more introduction-point circuits if at least one second
26294 had passed without any introduction-point circuits failing. Fixes
26295 bug 4607; bugfix on 0.0.7pre1.
26296 - Change the BridgePassword feature (part of the "bridge community"
26297 design, which is not yet implemented) to use a time-independent
26298 comparison. The old behavior might have allowed an adversary
26299 to use timing to guess the BridgePassword value. Fixes bug 5543;
26300 bugfix on 0.2.0.14-alpha.
26301 - Enforce correct return behavior of tor_vsscanf() when the '%%'
26302 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
26303 - When sending an HTTP/1.1 proxy request, include a Host header.
26304 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
26305 - Don't log that we have "decided to publish new relay descriptor"
26306 unless we are actually publishing a descriptor. Fixes bug 3942;
26307 bugfix on 0.2.2.28-beta.
26309 o Minor bugfixes (0.2.3.x):
26310 - Fix a bug where a bridge authority crashes (on a failed assert)
26311 if it has seen no directory requests when it's time to write
26312 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
26313 - Fix bug stomping on ORPort option NoListen and ignoring option
26314 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
26315 - In the testsuite, provide a large enough buffer in the tor_sscanf
26316 unit test. Otherwise we'd overrun that buffer and crash during
26317 the unit tests. Found by weasel. Fixes bug 5449; bugfix on
26319 - Make sure we create the keys directory if it doesn't exist and we're
26320 about to store the dynamic Diffie-Hellman parameters. Fixes bug
26321 5572; bugfix on 0.2.3.13-alpha.
26322 - Fix a small memory leak when trying to decode incorrect base16
26323 authenticator during SAFECOOKIE authentication. Found by
26324 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
26327 - Add more information to a log statement that might help track down
26328 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
26329 non-IP address" messages (or any Bug messages, for that matter!),
26330 please let us know about it.
26331 - Relays now understand an IPv6 address when they get one from a
26332 directory server. Resolves ticket 4875.
26333 - Resolve IPv6 addresses in bridge and entry statistics to country
26334 code "??" which means we at least count them. Resolves ticket 5053;
26335 improves on 0.2.3.9-alpha.
26336 - Update to the April 3 2012 Maxmind GeoLite Country database.
26337 - Begin a doc/state-contents.txt file to explain the contents of
26338 the Tor state file. Fixes bug 2987.
26340 o Default torrc changes:
26341 - Stop listing "socksport 9050" in torrc.sample. We open a socks
26342 port on 9050 by default anyway, so this should not change anything
26344 - Stop mentioning the deprecated *ListenAddress options in
26345 torrc.sample. Fixes bug 5438.
26346 - Document unit of bandwidth related options in sample torrc.
26349 o Removed features:
26350 - The "torify" script no longer supports the "tsocks" socksifier
26351 tool, since tsocks doesn't support DNS and UDP right for Tor.
26352 Everyone should be using torsocks instead. Fixes bugs 3530 and
26353 5180. Based on a patch by "ugh".
26355 o Code refactoring:
26356 - Change the symmetric cipher interface so that creating and
26357 initializing a stream cipher are no longer separate functions.
26358 - Remove all internal support for unpadded RSA. We never used it, and
26359 it would be a bad idea to start.
26362 Changes in version 0.2.3.13-alpha - 2012-03-26
26363 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
26364 in managed pluggable transports, as well as providing other cleanups
26365 that get us closer to a release candidate.
26367 o Directory authority changes:
26368 - Change IP address for maatuska (v3 directory authority).
26371 - Provide controllers with a safer way to implement the cookie
26372 authentication mechanism. With the old method, if another locally
26373 running program could convince a controller that it was the Tor
26374 process, then that program could trick the controller into telling
26375 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
26376 authentication method uses a challenge-response approach to prevent
26377 this attack. Fixes bug 5185, implements proposal 193.
26378 - Never use a bridge or a controller-supplied node as an exit, even
26379 if its exit policy allows it. Found by wanoskarnet. Fixes bug
26380 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
26381 and 0.2.0.3-alpha (for bridge-purpose descriptors).
26382 - Only build circuits if we have a sufficient threshold of the total
26383 descriptors that are marked in the consensus with the "Exit"
26384 flag. This mitigates an attack proposed by wanoskarnet, in which
26385 all of a client's bridges collude to restrict the exit nodes that
26386 the client knows about. Fixes bug 5343.
26388 o Major bugfixes (on Tor 0.2.3.x):
26389 - Avoid an assert when managed proxies like obfsproxy are configured,
26390 and we receive HUP signals or setconf attempts too rapidly. This
26391 situation happens most commonly when Vidalia tries to attach to
26392 Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
26393 bugfix on 0.2.3.6-alpha.
26394 - Fix a relay-side pluggable transports bug where managed proxies were
26395 unreachable from the Internet, because Tor asked them to bind on
26396 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
26397 - Stop discarding command-line arguments when TestingTorNetwork
26398 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
26399 0.2.3.9-alpha, where task 4552 added support for two layers of
26401 - Resume allowing the unit tests to run in gdb. This was accidentally
26402 made impossible when the DisableDebuggerAttachment option was
26403 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
26404 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
26405 0.2.3.11-alpha. Reported by Anthony G. Basile.
26407 o Minor bugfixes (on 0.2.2.x and earlier):
26408 - Ensure we don't cannibalize circuits that are longer than three hops
26409 already, so we don't end up making circuits with 5 or more
26410 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
26411 0.1.0.1-rc which introduced cannibalization.
26412 - Detect and reject certain misformed escape sequences in
26413 configuration values. Previously, these values would cause us
26414 to crash if received in a torrc file or over an authenticated
26415 control port. Bug found by Esteban Manchado Velázquez, and
26416 independently by Robert Connolly from Matta Consulting who further
26417 noted that it allows a post-authentication heap overflow. Patch
26418 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
26419 bugfix on 0.2.0.16-alpha.
26420 - Fix a compile warning when using the --enable-openbsd-malloc
26421 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
26422 - Directory caches no longer refuse to clean out descriptors because
26423 of missing v2 networkstatus documents, unless they're configured
26424 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
26425 0.2.2.26-beta. Patch by Daniel Bryg.
26426 - Update to the latest version of the tinytest unit testing framework.
26427 This includes a couple of bugfixes that can be relevant for
26428 running forked unit tests on Windows, and removes all reserved
26431 o Minor bugfixes (on 0.2.3.x):
26432 - On a failed pipe() call, don't leak file descriptors. Fixes bug
26433 4296; bugfix on 0.2.3.1-alpha.
26434 - Spec conformance: on a v3 handshake, do not send a NETINFO cell
26435 until after we have received a CERTS cell. Fixes bug 4361; bugfix
26436 on 0.2.3.6-alpha. Patch by "frosty".
26437 - When binding to an IPv6 address, set the IPV6_V6ONLY socket
26438 option, so that the IP stack doesn't decide to use it for IPv4
26439 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
26440 - Ensure that variables set in Tor's environment cannot override
26441 environment variables that Tor passes to a managed
26442 pluggable-transport proxy. Previously, Tor would pass every
26443 variable in its environment to managed proxies along with the new
26444 ones, in such a way that on many operating systems, the inherited
26445 environment variables would override those which Tor tried to
26446 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
26447 bugfix on 0.2.3.9-alpha for Windows.
26450 - A wide variety of new unit tests by Esteban Manchado Velázquez.
26451 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
26452 - Update to the March 6 2012 Maxmind GeoLite Country database.
26455 Changes in version 0.2.3.12-alpha - 2012-02-13
26456 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
26457 to use bridges that run Tor 0.2.2.x, and resolves several big bugs
26458 when Tor is configured to use a pluggable transport like obfsproxy.
26461 - Fix builds when the path to sed, openssl, or sha1sum contains
26462 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
26464 - Set the SO_REUSEADDR socket option before we call bind() on outgoing
26465 connections. This change should allow busy exit relays to stop
26466 running out of available sockets as quickly. Fixes bug 4950;
26467 bugfix on 0.2.2.26-beta.
26468 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
26469 would ask the bridge for microdescriptors, which are only supported
26470 in 0.2.3.x, and then fail to bootstrap when it didn't get the
26471 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
26472 - Properly set up obfsproxy's environment when in managed mode. The
26473 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
26474 and when you run your Tor as a daemon, there's no HOME. Fixes bugs
26475 5076 and 5082; bugfix on 0.2.3.6-alpha.
26478 - Use the dead_strip option when building Tor on OS X. This reduces
26479 binary size by almost 19% when linking openssl and libevent
26480 statically, which we do for Tor Browser Bundle.
26481 - Fix broken URLs in the sample torrc file, and tell readers about
26482 the OutboundBindAddress, ExitPolicyRejectPrivate, and
26483 PublishServerDescriptor options. Addresses bug 4652.
26484 - Update to the February 7 2012 Maxmind GeoLite Country database.
26487 - Downgrade the "We're missing a certificate" message from notice
26488 to info: people kept mistaking it for a real problem, whereas it
26489 is seldom the problem even when we are failing to bootstrap. Fixes
26490 bug 5067; bugfix on 0.2.0.10-alpha.
26491 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
26492 managed pluggable transport server proxy's environment.
26493 Previously, we would put it there, even though Tor doesn't
26494 implement an 'extended server port' yet, and even though Tor
26495 almost certainly isn't listening at that address. For now, we set
26496 it to an empty string to avoid crashing older obfsproxies. Bugfix
26498 - Log the heartbeat message every HeartbeatPeriod seconds, not every
26499 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
26500 0.2.3.1-alpha. Bug reported by Scott Bennett.
26501 - Calculate absolute paths correctly on Windows. Fixes bug 4973;
26502 bugfix on 0.2.3.11-alpha.
26503 - Update "ClientOnly" man page entry to explain that there isn't
26504 really any point to messing with it. Resolves ticket 5005.
26505 - Use the correct CVE number for CVE-2011-4576 in our comments and
26506 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
26509 o Code simplifications and refactoring:
26510 - Use the _WIN32 macro throughout our code to detect Windows.
26511 (Previously we had used the obsolete 'WIN32' and the idiosyncratic
26515 Changes in version 0.2.3.11-alpha - 2012-01-22
26516 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
26517 the last step of the plan to limit maximum circuit length, includes
26518 a wide variety of hidden service performance and correctness fixes,
26519 works around an OpenSSL security flaw if your distro is too stubborn
26520 to upgrade, and fixes a bunch of smaller issues.
26523 - Now that Tor 0.2.0.x is completely deprecated, enable the final
26524 part of "Proposal 110: Avoiding infinite length circuits" by
26525 refusing all circuit-extend requests that do not use a relay_early
26526 cell. This change helps Tor resist a class of denial-of-service
26527 attacks by limiting the maximum circuit length.
26528 - Adjust the number of introduction points that a hidden service
26529 will try to maintain based on how long its introduction points
26530 remain in use and how many introductions they handle. Fixes
26532 - Try to use system facilities for enumerating local interface
26533 addresses, before falling back to our old approach (which was
26534 binding a UDP socket, and calling getsockname() on it). That
26535 approach was scaring OS X users whose draconian firewall
26536 software warned about binding to UDP sockets, regardless of
26537 whether packets were sent. Now we try to use getifaddrs(),
26538 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
26539 system supports. Resolves ticket 1827.
26541 o Major security workaround:
26542 - When building or running with any version of OpenSSL earlier
26543 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
26544 versions have a bug (CVE-2011-4576) in which their block cipher
26545 padding includes uninitialized data, potentially leaking sensitive
26546 information to any peer with whom they make a SSLv3 connection. Tor
26547 does not use SSL v3 by default, but a hostile client or server
26548 could force an SSLv3 connection in order to gain information that
26549 they shouldn't have been able to get. The best solution here is to
26550 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
26551 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
26552 to make sure that the bug can't happen.
26555 - Fix the SOCKET_OK test that we use to tell when socket
26556 creation fails so that it works on Win64. Fixes part of bug 4533;
26557 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
26558 - Correct our replacements for the timeradd() and timersub() functions
26559 on platforms that lack them (for example, Windows). The timersub()
26560 function is used when expiring circuits, while timeradd() is
26561 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
26562 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
26563 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
26564 that was fixed in OpenSSL 1.0.0a. We test for the counter mode
26565 bug at runtime, not compile time, because some distributions hack
26566 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
26567 on 0.2.3.9-alpha. Found by Pascal.
26569 o Minor features (controller):
26570 - Use absolute path names when reporting the torrc filename in the
26571 control protocol, so a controller can more easily find the torrc
26572 file. Resolves bug 1101.
26573 - Extend the control protocol to report flags that control a circuit's
26574 path selection in CIRC events and in replies to 'GETINFO
26575 circuit-status'. Implements part of ticket 2411.
26576 - Extend the control protocol to report the hidden service address
26577 and current state of a hidden-service-related circuit in CIRC
26578 events and in replies to 'GETINFO circuit-status'. Implements part
26580 - When reporting the path to the cookie file to the controller,
26581 give an absolute path. Resolves ticket 4881.
26582 - Allow controllers to request an event notification whenever a
26583 circuit is cannibalized or its purpose is changed. Implements
26584 part of ticket 3457.
26585 - Include the creation time of a circuit in CIRC and CIRC2
26586 control-port events and the list produced by the 'GETINFO
26587 circuit-status' control-port command.
26589 o Minor features (directory authorities):
26590 - Directory authorities now reject versions of Tor older than
26591 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
26592 inclusive. These versions accounted for only a small fraction of
26593 the Tor network, and have numerous known security issues. Resolves
26595 - Authority operators can now vote for all relays in a given
26596 set of countries to be BadDir/BadExit/Invalid/Rejected.
26597 - Provide two consensus parameters (FastFlagMinThreshold and
26598 FastFlagMaxThreshold) to control the range of allowable bandwidths
26599 for the Fast directory flag. These allow authorities to run
26600 experiments on appropriate requirements for being a "Fast" node.
26601 The AuthDirFastGuarantee config value still applies. Implements
26603 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
26604 directory authority option (introduced in Tor 0.2.2.34).
26606 o Minor features (other):
26607 - Don't disable the DirPort when we cannot exceed our AccountingMax
26608 limit during this interval because the effective bandwidthrate is
26609 low enough. This is useful in a situation where AccountMax is only
26610 used as an additional safeguard or to provide statistics.
26611 - Prepend an informative header to generated dynamic_dh_params files.
26612 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
26613 EntryNodes will have no effect. Resolves issue 2571.
26614 - Log more useful messages when we fail to disable debugger
26616 - Log which authority we're missing votes from when we go to fetch
26617 them from the other auths.
26618 - Log (at debug level) whenever a circuit's purpose is changed.
26619 - Add missing documentation for the MaxClientCircuitsPending,
26620 UseMicrodescriptors, UserspaceIOCPBuffers, and
26621 _UseFilteringSSLBufferevents options, all introduced during
26622 the 0.2.3.x series.
26623 - Update to the January 3 2012 Maxmind GeoLite Country database.
26625 o Minor bugfixes (hidden services):
26626 - Don't close hidden service client circuits which have almost
26627 finished connecting to their destination when they reach
26628 the normal circuit-build timeout. Previously, we would close
26629 introduction circuits which are waiting for an acknowledgement
26630 from the introduction point, and rendezvous circuits which have
26631 been specified in an INTRODUCE1 cell sent to a hidden service,
26632 after the normal CBT. Now, we mark them as 'timed out', and launch
26633 another rendezvous attempt in parallel. This behavior change can
26634 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
26635 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
26636 - Don't close hidden-service-side rendezvous circuits when they
26637 reach the normal circuit-build timeout. This behavior change can
26638 be disabled using the new
26639 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
26640 remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
26641 - Make sure we never mark the wrong rendezvous circuit as having
26642 had its introduction cell acknowledged by the introduction-point
26643 relay. Previously, when we received an INTRODUCE_ACK cell on a
26644 client-side hidden-service introduction circuit, we might have
26645 marked a rendezvous circuit other than the one we specified in
26646 the INTRODUCE1 cell as INTRO_ACKED, which would have produced
26647 a warning message and interfered with the hidden service
26648 connection-establishment process. Fixes bug 4759; bugfix on
26649 0.2.3.3-alpha, when we added the stream-isolation feature which
26650 might cause Tor to open multiple rendezvous circuits for the same
26652 - Don't trigger an assertion failure when we mark a new client-side
26653 hidden-service introduction circuit for close during the process
26654 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
26657 o Minor bugfixes (log messages):
26658 - Correctly spell "connect" in a log message on failure to create a
26659 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
26661 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
26662 Fixes bug 4856; bugfix on Tor 0.0.6.
26663 - Fix the log message describing how we work around discovering
26664 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
26665 4837; bugfix on 0.2.2.9-alpha.
26666 - When logging about a disallowed .exit name, do not also call it
26667 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
26669 o Minor bugfixes (build fixes):
26670 - During configure, detect when we're building with clang version
26671 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
26672 CFLAGS. clang doesn't support them yet.
26673 - During configure, search for library containing cos function as
26674 libm lives in libcore on some platforms (BeOS/Haiku). Linking
26675 against libm was hard-coded before. Fixes the first part of bug
26676 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
26678 - Detect attempts to build Tor on (as yet hypothetical) versions
26679 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
26680 fix for bug 4533. Bugfix on 0.2.2.28-beta.
26681 - Preprocessor directives should not be put inside the arguments
26682 of a macro. This would break compilation with GCC releases prior
26683 to version 3.3. We would never recommend such an old GCC version,
26684 but it is apparently required for binary compatibility on some
26685 platforms (namely, certain builds of Haiku). Fixes the other part
26686 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
26689 o Minor bugfixes (other):
26690 - Older Linux kernels erroneously respond to strange nmap behavior
26691 by having accept() return successfully with a zero-length
26692 socket. When this happens, just close the connection. Previously,
26693 we would try harder to learn the remote address: but there was
26694 no such remote address to learn, and our method for trying to
26695 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
26696 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
26697 - Fix null-pointer access that could occur if TLS allocation failed.
26698 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
26699 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
26700 accidentally been reverted.
26701 - Fix our implementation of crypto_random_hostname() so it can't
26702 overflow on ridiculously large inputs. (No Tor version has ever
26703 provided this kind of bad inputs, but let's be correct in depth.)
26704 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
26705 - Find more places in the code that should have been testing for
26706 invalid sockets using the SOCKET_OK macro. Required for a fix
26707 for bug 4533. Bugfix on 0.2.2.28-beta.
26708 - Fix an assertion failure when, while running with bufferevents, a
26709 connection finishes connecting after it is marked for close, but
26710 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
26711 - test_util_spawn_background_ok() hardcoded the expected value
26712 for ENOENT to 2. This isn't portable as error numbers are
26713 platform specific, and particularly the hurd has ENOENT at
26714 0x40000002. Construct expected string at runtime, using the correct
26715 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
26716 - Reject attempts to disable DisableDebuggerAttachment while Tor is
26717 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
26718 - Use an appropriate-width type for sockets in tor-fw-helper on
26719 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
26722 - When sending or relaying a RELAY_EARLY cell, we used to convert
26723 it to a RELAY cell if the connection was using the v1 link
26724 protocol. This was a workaround for older versions of Tor, which
26725 didn't handle RELAY_EARLY cells properly. Now that all supported
26726 versions can handle RELAY_EARLY cells, and now that we're enforcing
26727 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
26728 remove this workaround. Addresses bug 4786.
26730 o Code simplifications and refactoring:
26731 - Use OpenSSL's built-in SSL_state_string_long() instead of our
26732 own homebrewed ssl_state_to_string() replacement. Patch from
26733 Emile Snyder. Fixes bug 4653.
26734 - Use macros to indicate OpenSSL versions, so we don't need to worry
26735 about accidental hexadecimal bit shifts.
26736 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
26738 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
26739 - Use the smartlist_add_asprintf() alias more consistently.
26740 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
26741 invalid value, rather than just -1.
26742 - Rename a handful of old identifiers, mostly related to crypto
26743 structures and crypto functions. By convention, our "create an
26744 object" functions are called "type_new()", our "free an object"
26745 functions are called "type_free()", and our types indicate that
26746 they are types only with a final "_t". But a handful of older
26747 types and functions broke these rules, with function names like
26748 "type_create" or "subsystem_op_type", or with type names like
26752 Changes in version 0.2.3.10-alpha - 2011-12-16
26753 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
26754 Tor's buffers code. Absolutely everybody should upgrade.
26756 The bug relied on an incorrect calculation when making data continuous
26757 in one of our IO buffers, if the first chunk of the buffer was
26758 misaligned by just the wrong amount. The miscalculation would allow an
26759 attacker to overflow a piece of heap-allocated memory. To mount this
26760 attack, the attacker would need to either open a SOCKS connection to
26761 Tor's SocksPort (usually restricted to localhost), or target a Tor
26762 instance configured to make its connections through a SOCKS proxy
26763 (which Tor does not do by default).
26765 Good security practice requires that all heap-overflow bugs should be
26766 presumed to be exploitable until proven otherwise, so we are treating
26767 this as a potential code execution attack. Please upgrade immediately!
26768 This bug does not affect bufferevents-based builds of Tor. Special
26769 thanks to "Vektor" for reporting this issue to us!
26771 This release also contains a few minor bugfixes for issues discovered
26775 - Fix a heap overflow bug that could occur when trying to pull
26776 data into the first chunk of a buffer, when that chunk had
26777 already had some data drained from it. Fixes CVE-2011-2778;
26778 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
26781 - If we can't attach streams to a rendezvous circuit when we
26782 finish connecting to a hidden service, clear the rendezvous
26783 circuit's stream-isolation state and try to attach streams
26784 again. Previously, we cleared rendezvous circuits' isolation
26785 state either too early (if they were freshly built) or not at all
26786 (if they had been built earlier and were cannibalized). Bugfix on
26787 0.2.3.3-alpha; fixes bug 4655.
26788 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
26789 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
26790 - Fix an assertion failure when a relay with accounting enabled
26791 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
26794 - Update to the December 6 2011 Maxmind GeoLite Country database.
26797 Changes in version 0.2.2.35 - 2011-12-16
26798 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
26799 buffers code. Absolutely everybody should upgrade.
26801 The bug relied on an incorrect calculation when making data continuous
26802 in one of our IO buffers, if the first chunk of the buffer was
26803 misaligned by just the wrong amount. The miscalculation would allow an
26804 attacker to overflow a piece of heap-allocated memory. To mount this
26805 attack, the attacker would need to either open a SOCKS connection to
26806 Tor's SocksPort (usually restricted to localhost), or target a Tor
26807 instance configured to make its connections through a SOCKS proxy
26808 (which Tor does not do by default).
26810 Good security practice requires that all heap-overflow bugs should be
26811 presumed to be exploitable until proven otherwise, so we are treating
26812 this as a potential code execution attack. Please upgrade immediately!
26813 This bug does not affect bufferevents-based builds of Tor. Special
26814 thanks to "Vektor" for reporting this issue to us!
26816 Tor 0.2.2.35 also fixes several bugs in previous versions, including
26817 crash bugs for unusual configurations, and a long-term bug that
26818 would prevent Tor from starting on Windows machines with draconian
26821 With this release, we remind everyone that 0.2.0.x has reached its
26822 formal end-of-life. Those Tor versions have many known flaws, and
26823 nobody should be using them. You should upgrade -- ideally to the
26824 0.2.2.x series. If you're using a Linux or BSD and its packages are
26825 obsolete, stop using those packages and upgrade anyway.
26827 The Tor 0.2.1.x series is also approaching its end-of-life: it will no
26828 longer receive support after some time in early 2012.
26831 - Fix a heap overflow bug that could occur when trying to pull
26832 data into the first chunk of a buffer, when that chunk had
26833 already had some data drained from it. Fixes CVE-2011-2778;
26834 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
26835 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
26836 that it doesn't attempt to allocate a socketpair. This could cause
26837 some problems on Windows systems with overzealous firewalls. Fix for
26838 bug 4457; workaround for Libevent versions 2.0.1-alpha through
26840 - If we mark an OR connection for close based on a cell we process,
26841 don't process any further cells on it. We already avoid further
26842 reads on marked-for-close connections, but now we also discard the
26843 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
26844 which was the first version where we might mark a connection for
26845 close based on processing a cell on it.
26846 - Correctly sanity-check that we don't underflow on a memory
26847 allocation (and then assert) for hidden service introduction
26848 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
26849 bugfix on 0.2.1.5-alpha.
26850 - Fix a memory leak when we check whether a hidden service
26851 descriptor has any usable introduction points left. Fixes bug
26852 4424. Bugfix on 0.2.2.25-alpha.
26853 - Don't crash when we're running as a relay and don't have a GeoIP
26854 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
26855 we've had in the 0.2.3.x branch already.
26856 - When running as a client, do not print a misleading (and plain
26857 wrong) log message that we're collecting "directory request"
26858 statistics: clients don't collect statistics. Also don't create a
26859 useless (because empty) stats file in the stats/ directory. Fixes
26860 bug 4353; bugfix on 0.2.2.34.
26863 - Detect failure to initialize Libevent. This fix provides better
26864 detection for future instances of bug 4457.
26865 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
26866 function. This was eating up hideously large amounts of time on some
26867 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
26868 - Resolve an integer overflow bug in smartlist_ensure_capacity().
26869 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
26871 - Don't warn about unused log_mutex in log.c when building with
26872 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
26873 0.1.0.6-rc which introduced --disable-threads.
26874 - When configuring, starting, or stopping an NT service, stop
26875 immediately after the service configuration attempt has succeeded
26876 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
26877 - When sending a NETINFO cell, include the original address
26878 received for the other side, not its canonical address. Found
26879 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
26880 - Fix a typo in a hibernation-related log message. Fixes bug 4331;
26881 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
26882 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
26883 occurred when a client tried to fetch a descriptor for a bridge
26884 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
26885 - Backport fixes for a pair of compilation warnings on Windows.
26886 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
26887 - If we had ever tried to call tor_addr_to_str on an address of
26888 unknown type, we would have done a strdup on an uninitialized
26889 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
26890 Reported by "troll_un".
26891 - Correctly detect and handle transient lookup failures from
26892 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
26893 Reported by "troll_un".
26894 - Fix null-pointer access that could occur if TLS allocation failed.
26895 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
26896 - Use tor_socket_t type for listener argument to accept(). Fixes bug
26897 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
26900 - Add two new config options for directory authorities:
26901 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
26902 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
26903 that is always sufficient to satisfy the bandwidth requirement for
26904 the Guard flag. Now it will be easier for researchers to simulate
26905 Tor networks with different values. Resolves ticket 4484.
26906 - When Tor ignores a hidden service specified in its configuration,
26907 include the hidden service's directory in the warning message.
26908 Previously, we would only tell the user that some hidden service
26909 was ignored. Bugfix on 0.0.6; fixes bug 4426.
26910 - Update to the December 6 2011 Maxmind GeoLite Country database.
26912 o Packaging changes:
26913 - Make it easier to automate expert package builds on Windows,
26914 by removing an absolute path from makensis.exe command.
26917 Changes in version 0.2.1.32 - 2011-12-16
26918 Tor 0.2.1.32 backports important security and privacy fixes for
26919 oldstable. This release is intended only for package maintainers and
26920 others who cannot use the 0.2.2 stable series. All others should be
26921 using Tor 0.2.2.x or newer.
26923 The Tor 0.2.1.x series will reach formal end-of-life some time in
26924 early 2012; we will stop releasing patches for it then.
26926 o Major bugfixes (also included in 0.2.2.x):
26927 - Correctly sanity-check that we don't underflow on a memory
26928 allocation (and then assert) for hidden service introduction
26929 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
26930 bugfix on 0.2.1.5-alpha.
26931 - Fix a heap overflow bug that could occur when trying to pull
26932 data into the first chunk of a buffer, when that chunk had
26933 already had some data drained from it. Fixes CVE-2011-2778;
26934 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
26937 - Update to the December 6 2011 Maxmind GeoLite Country database.
26940 Changes in version 0.2.3.9-alpha - 2011-12-08
26941 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
26942 a "DisableNetwork" security feature that bundles can use to avoid
26943 touching the network until bridges are configured, moves forward on
26944 the pluggable transport design, fixes a flaw in the hidden service
26945 design that unnecessarily prevented clients with wrong clocks from
26946 reaching hidden services, and fixes a wide variety of other issues.
26949 - Clients can now connect to private bridges over IPv6. Bridges
26950 still need at least one IPv4 address in order to connect to
26951 other relays. Note that we don't yet handle the case where the
26952 user has two bridge lines for the same bridge (one IPv4, one
26953 IPv6). Implements parts of proposal 186.
26954 - New "DisableNetwork" config option to prevent Tor from launching any
26955 connections or accepting any connections except on a control port.
26956 Bundles and controllers can set this option before letting Tor talk
26957 to the rest of the network, for example to prevent any connections
26958 to a non-bridge address. Packages like Orbot can also use this
26959 option to instruct Tor to save power when the network is off.
26960 - Clients and bridges can now be configured to use a separate
26961 "transport" proxy. This approach makes the censorship arms race
26962 easier by allowing bridges to use protocol obfuscation plugins. It
26963 implements the "managed proxy" part of proposal 180 (ticket 3472).
26964 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
26965 implementation. It makes AES_CTR about 7% faster than our old one
26966 (which was about 10% faster than the one OpenSSL used to provide).
26967 Resolves ticket 4526.
26968 - Add a "tor2web mode" for clients that want to connect to hidden
26969 services non-anonymously (and possibly more quickly). As a safety
26970 measure to try to keep users from turning this on without knowing
26971 what they are doing, tor2web mode must be explicitly enabled at
26972 compile time, and a copy of Tor compiled to run in tor2web mode
26973 cannot be used as a normal Tor client. Implements feature 2553.
26974 - Add experimental support for running on Windows with IOCP and no
26975 kernel-space socket buffers. This feature is controlled by a new
26976 "UserspaceIOCPBuffers" config option (off by default), which has
26977 no effect unless Tor has been built with support for bufferevents,
26978 is running on Windows, and has enabled IOCP. This may, in the long
26979 run, help solve or mitigate bug 98.
26980 - Use a more secure consensus parameter voting algorithm. Now at
26981 least three directory authorities or a majority of them must
26982 vote on a given parameter before it will be included in the
26983 consensus. Implements proposal 178.
26986 - Hidden services now ignore the timestamps on INTRODUCE2 cells.
26987 They used to check that the timestamp was within 30 minutes
26988 of their system clock, so they could cap the size of their
26989 replay-detection cache, but that approach unnecessarily refused
26990 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
26991 the v3 intro-point protocol (the first one which sent a timestamp
26992 field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
26993 - Only use the EVP interface when AES acceleration is enabled,
26994 to avoid a 5-7% performance regression. Resolves issue 4525;
26995 bugfix on 0.2.3.8-alpha.
26997 o Privacy/anonymity features (bridge detection):
26998 - Make bridge SSL certificates a bit more stealthy by using random
26999 serial numbers, in the same fashion as OpenSSL when generating
27000 self-signed certificates. Implements ticket 4584.
27001 - Introduce a new config option "DynamicDHGroups", enabled by
27002 default, which provides each bridge with a unique prime DH modulus
27003 to be used during SSL handshakes. This option attempts to help
27004 against censors who might use the Apache DH modulus as a static
27005 identifier for bridges. Addresses ticket 4548.
27007 o Minor features (new/different config options):
27008 - New configuration option "DisableDebuggerAttachment" (on by default)
27009 to prevent basic debugging attachment attempts by other processes.
27010 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
27011 - Allow MapAddress directives to specify matches against super-domains,
27012 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
27013 Implements issue 933.
27014 - Slightly change behavior of "list" options (that is, config
27015 options that can appear more than once) when they appear both in
27016 torrc and on the command line. Previously, the command-line options
27017 would be appended to the ones from torrc. Now, the command-line
27018 options override the torrc options entirely. This new behavior
27019 allows the user to override list options (like exit policies and
27020 ports to listen on) from the command line, rather than simply
27021 appending to the list.
27022 - You can get the old (appending) command-line behavior for "list"
27023 options by prefixing the option name with a "+".
27024 - You can remove all the values for a "list" option from the command
27025 line without adding any new ones by prefixing the option name
27027 - Add experimental support for a "defaults" torrc file to be parsed
27028 before the regular torrc. Torrc options override the defaults file's
27029 options in the same way that the command line overrides the torrc.
27030 The SAVECONF controller command saves only those options which
27031 differ between the current configuration and the defaults file. HUP
27032 reloads both files. (Note: This is an experimental feature; its
27033 behavior will probably be refined in future 0.2.3.x-alpha versions
27034 to better meet packagers' needs.) Implements task 4552.
27037 - Try to make the introductory warning message that Tor prints on
27038 startup more useful for actually finding help and information.
27039 Resolves ticket 2474.
27040 - Running "make version" now displays the version of Tor that
27041 we're about to build. Idea from katmagic; resolves issue 4400.
27042 - Expire old or over-used hidden service introduction points.
27043 Required by fix for bug 3460.
27044 - Move the replay-detection cache for the RSA-encrypted parts of
27045 INTRODUCE2 cells to the introduction point data structures.
27046 Previously, we would use one replay-detection cache per hidden
27047 service. Required by fix for bug 3460.
27048 - Reduce the lifetime of elements of hidden services' Diffie-Hellman
27049 public key replay-detection cache from 60 minutes to 5 minutes. This
27050 replay-detection cache is now used only to detect multiple
27051 INTRODUCE2 cells specifying the same rendezvous point, so we can
27052 avoid launching multiple simultaneous attempts to connect to it.
27054 o Minor bugfixes (on Tor 0.2.2.x and earlier):
27055 - Resolve an integer overflow bug in smartlist_ensure_capacity().
27056 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
27058 - Fix a minor formatting issue in one of tor-gencert's error messages.
27060 - Prevent a false positive from the check-spaces script, by disabling
27061 the "whitespace between function name and (" check for functions
27063 - Fix a log message suggesting that people contact a non-existent
27064 email address. Fixes bug 3448.
27065 - Fix null-pointer access that could occur if TLS allocation failed.
27066 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
27067 - Report a real bootstrap problem to the controller on router
27068 identity mismatch. Previously we just said "foo", which probably
27069 made a lot of sense at the time. Fixes bug 4169; bugfix on
27071 - If we had ever tried to call tor_addr_to_str() on an address of
27072 unknown type, we would have done a strdup() on an uninitialized
27073 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
27074 Reported by "troll_un".
27075 - Correctly detect and handle transient lookup failures from
27076 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
27077 Reported by "troll_un".
27078 - Use tor_socket_t type for listener argument to accept(). Fixes bug
27079 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
27080 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
27081 bug 4532; found by "troll_un".
27083 o Minor bugfixes (on Tor 0.2.3.x):
27084 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
27086 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
27087 circuit for use as a hidden service client's rendezvous point.
27088 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
27089 with help from wanoskarnet.
27090 - Restore behavior of overriding SocksPort, ORPort, and similar
27091 options from the command line. Bugfix on 0.2.3.3-alpha.
27094 - Properly handle the case where the build-tree is not the same
27095 as the source tree when generating src/common/common_sha1.i,
27096 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
27097 bugfix on 0.2.0.1-alpha.
27099 o Code simplifications, cleanups, and refactorings:
27100 - Remove the pure attribute from all functions that used it
27101 previously. In many cases we assigned it incorrectly, because the
27102 functions might assert or call impure functions, and we don't have
27103 evidence that keeping the pure attribute is worthwhile. Implements
27104 changes suggested in ticket 4421.
27105 - Remove some dead code spotted by coverity. Fixes cid 432.
27106 Bugfix on 0.2.3.1-alpha, closes bug 4637.
27109 Changes in version 0.2.3.8-alpha - 2011-11-22
27110 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
27111 socketpair-related bug that has been bothering Windows users. It adds
27112 support to serve microdescriptors to controllers, so Vidalia's network
27113 map can resume listing relays (once Vidalia implements its side),
27114 and adds better support for hardware AES acceleration. Finally, it
27115 starts the process of adjusting the bandwidth cutoff for getting the
27116 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
27117 that tiny relays harm performance more than they help network capacity.
27120 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
27121 that it doesn't attempt to allocate a socketpair. This could cause
27122 some problems on Windows systems with overzealous firewalls. Fix for
27123 bug 4457; workaround for Libevent versions 2.0.1-alpha through
27125 - Correctly sanity-check that we don't underflow on a memory
27126 allocation (and then assert) for hidden service introduction
27127 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27128 bugfix on 0.2.1.5-alpha.
27129 - Remove the artificially low cutoff of 20KB to guarantee the Fast
27130 flag. In the past few years the average relay speed has picked
27131 up, and while the "top 7/8 of the network get the Fast flag" and
27132 "all relays with 20KB or more of capacity get the Fast flag" rules
27133 used to have the same result, now the top 7/8 of the network has
27134 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
27135 - Fix a rare assertion failure when checking whether a v0 hidden
27136 service descriptor has any usable introduction points left, and
27137 we don't have enough information to build a circuit to the first
27138 intro point named in the descriptor. The HS client code in
27139 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
27140 trigger on (and crash) v0 HS authorities. Fixes bug 4411.
27141 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
27142 - Make bridge authorities not crash when they are asked for their own
27143 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
27144 - When running as a client, do not print a misleading (and plain
27145 wrong) log message that we're collecting "directory request"
27146 statistics: clients don't collect statistics. Also don't create a
27147 useless (because empty) stats file in the stats/ directory. Fixes
27148 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
27151 - Allow Tor controllers like Vidalia to obtain the microdescriptor
27152 for a relay by identity digest or nickname. Previously,
27153 microdescriptors were only available by their own digests, so a
27154 controller would have to ask for and parse the whole microdescriptor
27155 consensus in order to look up a single relay's microdesc. Fixes
27156 bug 3832; bugfix on 0.2.3.1-alpha.
27157 - Use OpenSSL's EVP interface for AES encryption, so that all AES
27158 operations can use hardware acceleration (if present). Resolves
27161 o Minor bugfixes (on 0.2.2.x and earlier):
27162 - Detect failure to initialize Libevent. This fix provides better
27163 detection for future instances of bug 4457.
27164 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
27165 function. This was eating up hideously large amounts of time on some
27166 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
27167 - Don't warn about unused log_mutex in log.c when building with
27168 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
27169 0.1.0.6-rc which introduced --disable-threads.
27170 - Allow manual 'authenticate' commands to the controller interface
27171 from netcat (nc) as well as telnet. We were rejecting them because
27172 they didn't come with the expected whitespace at the end of the
27173 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
27174 - Fix some (not actually triggerable) buffer size checks in usage of
27175 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
27177 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
27178 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
27179 - When configuring, starting, or stopping an NT service, stop
27180 immediately after the service configuration attempt has succeeded
27181 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
27182 - When sending a NETINFO cell, include the original address
27183 received for the other side, not its canonical address. Found
27184 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
27185 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
27186 can pick them up when the tests aren't disabled. Bugfix on
27187 0.2.2.4-alpha which introduced tinytest.
27188 - Fix a memory leak when we check whether a hidden service
27189 descriptor has any usable introduction points left. Fixes bug
27190 4424. Bugfix on 0.2.2.25-alpha.
27191 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
27192 occurred when a client tried to fetch a descriptor for a bridge
27193 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
27195 o Minor bugfixes (on 0.2.3.x):
27196 - Make util unit tests build correctly with MSVC. Bugfix on
27197 0.2.3.3-alpha. Patch by Gisle Vanem.
27198 - Successfully detect AUTH_CHALLENGE cells with no recognized
27199 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
27200 Found by frosty_un.
27201 - If a relay receives an AUTH_CHALLENGE cell it can't answer,
27202 it should still send a NETINFO cell to allow the connection to
27203 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
27205 - Log less loudly when we get an invalid authentication certificate
27206 from a source other than a directory authority: it's not unusual
27207 to see invalid certs because of clock skew. Fixes bug 4370; bugfix
27209 - Tolerate servers with more clock skew in their authentication
27210 certificates than previously. Fixes bug 4371; bugfix on
27212 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
27213 on 0.2.3.4-alpha and 0.2.3.6-alpha.
27216 - Add two new config options for directory authorities:
27217 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
27218 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
27219 that is always sufficient to satisfy the bandwidth requirement for
27220 the Guard flag. Now it will be easier for researchers to simulate
27221 Tor networks with different values. Resolves ticket 4484.
27222 - When Tor ignores a hidden service specified in its configuration,
27223 include the hidden service's directory in the warning message.
27224 Previously, we would only tell the user that some hidden service
27225 was ignored. Bugfix on 0.0.6; fixes bug 4426.
27226 - When we fail to initialize Libevent, retry with IOCP disabled so we
27227 don't need to turn on multi-threading support in Libevent, which in
27228 turn requires a working socketpair(). This is a workaround for bug
27229 4457, which affects Libevent versions from 2.0.1-alpha through
27231 - Detect when we try to build on a platform that doesn't define
27232 AF_UNSPEC to 0. We don't work there, so refuse to compile.
27233 - Update to the November 1 2011 Maxmind GeoLite Country database.
27235 o Packaging changes:
27236 - Make it easier to automate expert package builds on Windows,
27237 by removing an absolute path from makensis.exe command.
27239 o Code simplifications and refactoring:
27240 - Remove some redundant #include directives throughout the code.
27241 Patch from Andrea Gelmini.
27242 - Unconditionally use OpenSSL's AES implementation instead of our
27243 old built-in one. OpenSSL's AES has been better for a while, and
27244 relatively few servers should still be on any version of OpenSSL
27245 that doesn't have good optimized assembly AES.
27246 - Use the name "CERTS" consistently to refer to the new cell type;
27247 we were calling it CERT in some places and CERTS in others.
27250 - Numerous new unit tests for functions in util.c and address.c by
27252 - The long-disabled benchmark tests are now split into their own
27253 ./src/test/bench binary.
27254 - The benchmark tests can now use more accurate timers than
27255 gettimeofday() when such timers are available.
27258 Changes in version 0.2.3.7-alpha - 2011-10-30
27259 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
27260 the new v3 handshake. It also resolves yet another bridge address
27264 - If we mark an OR connection for close based on a cell we process,
27265 don't process any further cells on it. We already avoid further
27266 reads on marked-for-close connections, but now we also discard the
27267 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
27268 which was the first version where we might mark a connection for
27269 close based on processing a cell on it.
27270 - Fix a double-free bug that would occur when we received an invalid
27271 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
27272 bugfix on 0.2.3.6-alpha.
27273 - Bridges no longer include their address in NETINFO cells on outgoing
27274 OR connections, to allow them to blend in better with clients.
27275 Removes another avenue for enumerating bridges. Reported by
27276 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
27277 cells were introduced.
27280 - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
27281 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
27284 Changes in version 0.2.3.6-alpha - 2011-10-26
27285 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
27286 anonymity vulnerability where an attacker can deanonymize Tor
27287 users. Everybody should upgrade.
27289 This release also features support for a new v3 connection handshake
27290 protocol, and fixes to make hidden service connections more robust.
27293 - Implement a new handshake protocol (v3) for authenticating Tors to
27294 each other over TLS. It should be more resistant to fingerprinting
27295 than previous protocols, and should require less TLS hacking for
27296 future Tor implementations. Implements proposal 176.
27297 - Allow variable-length padding cells to disguise the length of
27298 Tor's TLS records. Implements part of proposal 184.
27300 o Privacy/anonymity fixes (clients):
27301 - Clients and bridges no longer send TLS certificate chains on
27302 outgoing OR connections. Previously, each client or bridge would
27303 use the same cert chain for all outgoing OR connections until
27304 its IP address changes, which allowed any relay that the client
27305 or bridge contacted to determine which entry guards it is using.
27306 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27307 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27308 no longer considers that connection as suitable for satisfying a
27309 circuit EXTEND request. Now relays can protect clients from the
27310 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27311 - Directory authorities no longer assign the Guard flag to relays
27312 that haven't upgraded to the above "refuse EXTEND requests
27313 to client connections" fix. Now directory authorities can
27314 protect clients from the CVE-2011-2768 issue even if neither
27315 the clients nor the relays have upgraded yet. There's a new
27316 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
27317 to let us transition smoothly, else tomorrow there would be no
27320 o Major bugfixes (hidden services):
27321 - Improve hidden service robustness: when an attempt to connect to
27322 a hidden service ends, be willing to refetch its hidden service
27323 descriptors from each of the HSDir relays responsible for them
27324 immediately. Previously, we would not consider refetching the
27325 service's descriptors from each HSDir for 15 minutes after the last
27326 fetch, which was inconvenient if the hidden service was not running
27327 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
27328 - When one of a hidden service's introduction points appears to be
27329 unreachable, stop trying it. Previously, we would keep trying
27330 to build circuits to the introduction point until we lost the
27331 descriptor, usually because the user gave up and restarted Tor.
27332 Partly fixes bug 3825.
27333 - Don't launch a useless circuit after failing to use one of a
27334 hidden service's introduction points. Previously, we would
27335 launch a new introduction circuit, but not set the hidden service
27336 which that circuit was intended to connect to, so it would never
27337 actually be used. A different piece of code would then create a
27338 new introduction circuit correctly. Bug reported by katmagic and
27339 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
27341 o Major bugfixes (other):
27342 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27343 that they initiated. Relays could distinguish incoming bridge
27344 connections from client connections, creating another avenue for
27345 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27346 Found by "frosty_un".
27347 - Don't update the AccountingSoftLimitHitAt state file entry whenever
27348 tor gets started. This prevents a wrong average bandwidth
27349 estimate, which would cause relays to always start a new accounting
27350 interval at the earliest possible moment. Fixes bug 2003; bugfix
27351 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
27352 immensely in tracking this bug down.
27353 - Fix a crash bug when changing node restrictions while a DNS lookup
27354 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
27357 o Minor bugfixes (on 0.2.2.x and earlier):
27358 - When a hidden service turns an extra service-side introduction
27359 circuit into a general-purpose circuit, free the rend_data and
27360 intro_key fields first, so we won't leak memory if the circuit
27361 is cannibalized for use as another service-side introduction
27362 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
27363 - Rephrase the log message emitted if the TestSocks check is
27364 successful. Patch from Fabian Keil; fixes bug 4094.
27365 - Bridges now skip DNS self-tests, to act a little more stealthily.
27366 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
27367 bridges. Patch by "warms0x".
27368 - Remove a confusing dollar sign from the example fingerprint in the
27369 man page, and also make the example fingerprint a valid one. Fixes
27370 bug 4309; bugfix on 0.2.1.3-alpha.
27371 - Fix internal bug-checking logic that was supposed to catch
27372 failures in digest generation so that it will fail more robustly
27373 if we ask for a nonexistent algorithm. Found by Coverity Scan.
27374 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
27375 - Report any failure in init_keys() calls launched because our
27376 IP address has changed. Spotted by Coverity Scan. Bugfix on
27377 0.1.1.4-alpha; fixes CID 484.
27379 o Minor bugfixes (on 0.2.3.x):
27380 - Fix a bug in configure.in that kept it from building a configure
27381 script with autoconf versions earlier than 2.61. Fixes bug 2430;
27382 bugfix on 0.2.3.1-alpha.
27383 - Don't warn users that they are exposing a client port to the
27384 Internet if they have specified an RFC1918 address. Previously,
27385 we would warn if the user had specified any non-loopback
27386 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
27387 - Fix memory leaks in the failing cases of the new SocksPort and
27388 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
27389 fixes coverity CIDs 485, 486, and 487.
27392 - When a hidden service's introduction point times out, consider
27393 trying it again during the next attempt to connect to the
27394 HS. Previously, we would not try it again unless a newly fetched
27395 descriptor contained it. Required by fixes for bugs 1297 and 3825.
27396 - The next version of Windows will be called Windows 8, and it has
27397 a major version of 6, minor version of 2. Correctly identify that
27398 version instead of calling it "Very recent version". Resolves
27399 ticket 4153; reported by funkstar.
27400 - The Bridge Authority now writes statistics on how many bridge
27401 descriptors it gave out in total, and how many unique descriptors
27402 it gave out. It also lists how often the most and least commonly
27403 fetched descriptors were given out, as well as the median and
27404 25th/75th percentile. Implements tickets 4200 and 4294.
27405 - Update to the October 4 2011 Maxmind GeoLite Country database.
27407 o Code simplifications and refactoring:
27408 - Remove some old code to remember statistics about which descriptors
27409 we've served as a directory mirror. The feature wasn't used and
27410 is outdated now that microdescriptors are around.
27411 - Rename Tor functions that turn strings into addresses, so that
27412 "parse" indicates that no hostname resolution occurs, and
27413 "lookup" indicates that hostname resolution may occur. This
27414 should help prevent mistakes in the future. Fixes bug 3512.
27417 Changes in version 0.2.2.34 - 2011-10-26
27418 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
27419 can deanonymize Tor users. Everybody should upgrade.
27421 The attack relies on four components: 1) Clients reuse their TLS cert
27422 when talking to different relays, so relays can recognize a user by
27423 the identity key in her cert. 2) An attacker who knows the client's
27424 identity key can probe each guard relay to see if that identity key
27425 is connected to that guard relay right now. 3) A variety of active
27426 attacks in the literature (starting from "Low-Cost Traffic Analysis
27427 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
27428 discover the guard relays that a Tor user visiting the website is using.
27429 4) Clients typically pick three guards at random, so the set of guards
27430 for a given user could well be a unique fingerprint for her. This
27431 release fixes components #1 and #2, which is enough to block the attack;
27432 the other two remain as open research problems. Special thanks to
27433 "frosty_un" for reporting the issue to us!
27435 Clients should upgrade so they are no longer recognizable by the TLS
27436 certs they present. Relays should upgrade so they no longer allow a
27437 remote attacker to probe them to test whether unpatched clients are
27438 currently connected to them.
27440 This release also fixes several vulnerabilities that allow an attacker
27441 to enumerate bridge relays. Some bridge enumeration attacks still
27442 remain; see for example proposal 188.
27444 o Privacy/anonymity fixes (clients):
27445 - Clients and bridges no longer send TLS certificate chains on
27446 outgoing OR connections. Previously, each client or bridge would
27447 use the same cert chain for all outgoing OR connections until
27448 its IP address changes, which allowed any relay that the client
27449 or bridge contacted to determine which entry guards it is using.
27450 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27451 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27452 no longer considers that connection as suitable for satisfying a
27453 circuit EXTEND request. Now relays can protect clients from the
27454 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27455 - Directory authorities no longer assign the Guard flag to relays
27456 that haven't upgraded to the above "refuse EXTEND requests
27457 to client connections" fix. Now directory authorities can
27458 protect clients from the CVE-2011-2768 issue even if neither
27459 the clients nor the relays have upgraded yet. There's a new
27460 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
27461 to let us transition smoothly, else tomorrow there would be no
27464 o Privacy/anonymity fixes (bridge enumeration):
27465 - Bridge relays now do their directory fetches inside Tor TLS
27466 connections, like all the other clients do, rather than connecting
27467 directly to the DirPort like public relays do. Removes another
27468 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
27469 - Bridges relays now build circuits for themselves in a more similar
27470 way to how clients build them. Removes another avenue for
27471 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
27472 when bridges were introduced.
27473 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27474 that they initiated. Relays could distinguish incoming bridge
27475 connections from client connections, creating another avenue for
27476 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27477 Found by "frosty_un".
27480 - Fix a crash bug when changing node restrictions while a DNS lookup
27481 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
27483 - Don't launch a useless circuit after failing to use one of a
27484 hidden service's introduction points. Previously, we would
27485 launch a new introduction circuit, but not set the hidden service
27486 which that circuit was intended to connect to, so it would never
27487 actually be used. A different piece of code would then create a
27488 new introduction circuit correctly. Bug reported by katmagic and
27489 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
27492 - Change an integer overflow check in the OpenBSD_Malloc code so
27493 that GCC is less likely to eliminate it as impossible. Patch
27494 from Mansour Moufid. Fixes bug 4059.
27495 - When a hidden service turns an extra service-side introduction
27496 circuit into a general-purpose circuit, free the rend_data and
27497 intro_key fields first, so we won't leak memory if the circuit
27498 is cannibalized for use as another service-side introduction
27499 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
27500 - Bridges now skip DNS self-tests, to act a little more stealthily.
27501 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
27502 bridges. Patch by "warms0x".
27503 - Fix internal bug-checking logic that was supposed to catch
27504 failures in digest generation so that it will fail more robustly
27505 if we ask for a nonexistent algorithm. Found by Coverity Scan.
27506 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
27507 - Report any failure in init_keys() calls launched because our
27508 IP address has changed. Spotted by Coverity Scan. Bugfix on
27509 0.1.1.4-alpha; fixes CID 484.
27511 o Minor bugfixes (log messages and documentation):
27512 - Remove a confusing dollar sign from the example fingerprint in the
27513 man page, and also make the example fingerprint a valid one. Fixes
27514 bug 4309; bugfix on 0.2.1.3-alpha.
27515 - The next version of Windows will be called Windows 8, and it has
27516 a major version of 6, minor version of 2. Correctly identify that
27517 version instead of calling it "Very recent version". Resolves
27518 ticket 4153; reported by funkstar.
27519 - Downgrade log messages about circuit timeout calibration from
27520 "notice" to "info": they don't require or suggest any human
27521 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
27522 bugfix on 0.2.2.14-alpha.
27525 - Turn on directory request statistics by default and include them in
27526 extra-info descriptors. Don't break if we have no GeoIP database.
27527 Backported from 0.2.3.1-alpha; implements ticket 3951.
27528 - Update to the October 4 2011 Maxmind GeoLite Country database.
27531 Changes in version 0.2.1.31 - 2011-10-26
27532 Tor 0.2.1.31 backports important security and privacy fixes for
27533 oldstable. This release is intended only for package maintainers and
27534 others who cannot use the 0.2.2 stable series. All others should be
27535 using Tor 0.2.2.x or newer.
27537 o Security fixes (also included in 0.2.2.x):
27538 - Replace all potentially sensitive memory comparison operations
27539 with versions whose runtime does not depend on the data being
27540 compared. This will help resist a class of attacks where an
27541 adversary can use variations in timing information to learn
27542 sensitive data. Fix for one case of bug 3122. (Safe memcmp
27543 implementation by Robert Ransom based partially on code by DJB.)
27544 - Fix an assert in parsing router descriptors containing IPv6
27545 addresses. This one took down the directory authorities when
27546 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
27548 o Privacy/anonymity fixes (also included in 0.2.2.x):
27549 - Clients and bridges no longer send TLS certificate chains on
27550 outgoing OR connections. Previously, each client or bridge would
27551 use the same cert chain for all outgoing OR connections until
27552 its IP address changes, which allowed any relay that the client
27553 or bridge contacted to determine which entry guards it is using.
27554 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27555 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27556 no longer considers that connection as suitable for satisfying a
27557 circuit EXTEND request. Now relays can protect clients from the
27558 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27559 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27560 that they initiated. Relays could distinguish incoming bridge
27561 connections from client connections, creating another avenue for
27562 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27563 Found by "frosty_un".
27564 - When receiving a hidden service descriptor, check that it is for
27565 the hidden service we wanted. Previously, Tor would store any
27566 hidden service descriptors that a directory gave it, whether it
27567 wanted them or not. This wouldn't have let an attacker impersonate
27568 a hidden service, but it did let directories pre-seed a client
27569 with descriptors that it didn't want. Bugfix on 0.0.6.
27570 - Avoid linkability based on cached hidden service descriptors: forget
27571 all hidden service descriptors cached as a client when processing a
27572 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
27573 - Make the bridge directory authority refuse to answer directory
27574 requests for "all" descriptors. It used to include bridge
27575 descriptors in its answer, which was a major information leak.
27576 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
27577 - Don't attach new streams to old rendezvous circuits after SIGNAL
27578 NEWNYM. Previously, we would keep using an existing rendezvous
27579 circuit if it remained open (i.e. if it were kept open by a
27580 long-lived stream, or if a new stream were attached to it before
27581 Tor could notice that it was old and no longer in use). Bugfix on
27582 0.1.1.15-rc; fixes bug 3375.
27584 o Minor bugfixes (also included in 0.2.2.x):
27585 - When we restart our relay, we might get a successful connection
27586 from the outside before we've started our reachability tests,
27587 triggering a warning: "ORPort found reachable, but I have no
27588 routerinfo yet. Failing to inform controller of success." This
27589 bug was harmless unless Tor is running under a controller
27590 like Vidalia, in which case the controller would never get a
27591 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
27593 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
27594 enabled. Fixes bug 1526.
27595 - Remove undocumented option "-F" from tor-resolve: it hasn't done
27596 anything since 0.2.1.16-rc.
27597 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
27598 None of the cases where we did this before were wrong, but by making
27599 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
27600 - Fix a rare crash bug that could occur when a client was configured
27601 with a large number of bridges. Fixes bug 2629; bugfix on
27602 0.2.1.2-alpha. Bugfix by trac user "shitlei".
27603 - Correct the warning displayed when a rendezvous descriptor exceeds
27604 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
27606 - Fix an uncommon assertion failure when running with DNSPort under
27607 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
27608 - When warning about missing zlib development packages during compile,
27609 give the correct package names. Bugfix on 0.2.0.1-alpha.
27610 - Require that introduction point keys and onion keys have public
27611 exponent 65537. Bugfix on 0.2.0.10-alpha.
27612 - Do not crash when our configuration file becomes unreadable, for
27613 example due to a permissions change, between when we start up
27614 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
27616 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
27618 - Always NUL-terminate the sun_path field of a sockaddr_un before
27619 passing it to the kernel. (Not a security issue: kernels are
27620 smart enough to reject bad sockaddr_uns.) Found by Coverity;
27621 CID #428. Bugfix on Tor 0.2.0.3-alpha.
27622 - Don't stack-allocate the list of supplementary GIDs when we're
27623 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
27624 could take up to 256K, which is way too much stack. Found by
27625 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
27627 o Minor bugfixes (only in 0.2.1.x):
27628 - Resume using micro-version numbers in 0.2.1.x: our Debian packages
27629 rely on them. Bugfix on 0.2.1.30.
27630 - Use git revisions instead of svn revisions when generating our
27631 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
27633 o Minor features (also included in 0.2.2.x):
27634 - Adjust the expiration time on our SSL session certificates to
27635 better match SSL certs seen in the wild. Resolves ticket 4014.
27636 - Allow nameservers with IPv6 address. Resolves bug 2574.
27637 - Update to the October 4 2011 Maxmind GeoLite Country database.
27640 Changes in version 0.2.3.5-alpha - 2011-09-28
27641 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
27642 bridge relays; fixes an assertion error that many users started hitting
27643 today; and adds the ability to refill token buckets more often than
27644 once per second, allowing significant performance improvements.
27647 - Bridge relays now do their directory fetches inside Tor TLS
27648 connections, like all the other clients do, rather than connecting
27649 directly to the DirPort like public relays do. Removes another
27650 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
27651 - Bridges relays now build circuits for themselves in a more similar
27652 way to how clients build them. Removes another avenue for
27653 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
27654 when bridges were introduced.
27657 - Fix an "Assertion md->held_by_node == 1 failed" error that could
27658 occur when the same microdescriptor was referenced by two node_t
27659 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
27661 o Major features (networking):
27662 - Add a new TokenBucketRefillInterval option to refill token buckets
27663 more frequently than once per second. This should improve network
27664 performance, alleviate queueing problems, and make traffic less
27665 bursty. Implements proposal 183; closes ticket 3630. Design by
27666 Florian Tschorsch and Björn Scheuermann; implementation by
27670 - Change an integer overflow check in the OpenBSD_Malloc code so
27671 that GCC is less likely to eliminate it as impossible. Patch
27672 from Mansour Moufid. Fixes bug 4059.
27674 o Minor bugfixes (usability):
27675 - Downgrade log messages about circuit timeout calibration from
27676 "notice" to "info": they don't require or suggest any human
27677 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
27678 bugfix on 0.2.2.14-alpha.
27680 o Minor features (diagnostics):
27681 - When the system call to create a listener socket fails, log the
27682 error message explaining why. This may help diagnose bug 4027.
27685 Changes in version 0.2.3.4-alpha - 2011-09-13
27686 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
27687 tweak to Tor's TLS handshake that makes relays and bridges that run
27688 this new version reachable from Iran again. It also fixes a few new
27689 bugs in 0.2.3.x, and teaches relays to recognize when they're not
27690 listed in the network consensus and republish.
27692 o Major bugfixes (also part of 0.2.2.33):
27693 - Avoid an assertion failure when reloading a configuration with
27694 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
27695 3923; bugfix on 0.2.2.25-alpha.
27697 o Minor features (security, also part of 0.2.2.33):
27698 - Check for replays of the public-key encrypted portion of an
27699 INTRODUCE1 cell, in addition to the current check for replays of
27700 the g^x value. This prevents a possible class of active attacks
27701 by an attacker who controls both an introduction point and a
27702 rendezvous point, and who uses the malleability of AES-CTR to
27703 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
27704 that these attacks are infeasible (requiring the attacker to send
27705 on the order of zettabytes of altered cells in a short interval),
27706 but we'd rather block them off in case there are any classes of
27707 this attack that we missed. Reported by Willem Pinckaers.
27709 o Minor features (also part of 0.2.2.33):
27710 - Adjust the expiration time on our SSL session certificates to
27711 better match SSL certs seen in the wild. Resolves ticket 4014.
27712 - Change the default required uptime for a relay to be accepted as
27713 a HSDir (hidden service directory) from 24 hours to 25 hours.
27714 Improves on 0.2.0.10-alpha; resolves ticket 2649.
27715 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
27716 authorities to abstain from voting on assignment of the HSDir
27717 consensus flag. Related to bug 2649.
27718 - Update to the September 6 2011 Maxmind GeoLite Country database.
27720 o Minor bugfixes (also part of 0.2.2.33):
27721 - Demote the 'replay detected' log message emitted when a hidden
27722 service receives the same Diffie-Hellman public key in two different
27723 INTRODUCE2 cells to info level. A normal Tor client can cause that
27724 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
27725 fixes part of bug 2442.
27726 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
27727 level. There is nothing that a hidden service's operator can do
27728 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
27730 - Clarify a log message specifying the characters permitted in
27731 HiddenServiceAuthorizeClient client names. Previously, the log
27732 message said that "[A-Za-z0-9+-_]" were permitted; that could have
27733 given the impression that every ASCII character between "+" and "_"
27734 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
27736 o Build fixes (also part of 0.2.2.33):
27737 - Clean up some code issues that prevented Tor from building on older
27738 BSDs. Fixes bug 3894; reported by "grarpamp".
27739 - Search for a platform-specific version of "ar" when cross-compiling.
27740 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
27743 - Fix a bug where the SocksPort option (for example) would get
27744 ignored and replaced by the default if a SocksListenAddress
27745 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
27749 - Relays now try regenerating and uploading their descriptor more
27750 frequently if they are not listed in the consensus, or if the
27751 version of their descriptor listed in the consensus is too
27752 old. This fix should prevent situations where a server declines
27753 to re-publish itself because it has done so too recently, even
27754 though the authorities decided not to list its recent-enough
27755 descriptor. Fix for bug 3327.
27758 - Relays now include a reason for regenerating their descriptors
27759 in an HTTP header when uploading to the authorities. This will
27760 make it easier to debug descriptor-upload issues in the future.
27761 - When starting as root and then changing our UID via the User
27762 control option, and we have a ControlSocket configured, make sure
27763 that the ControlSocket is owned by the same account that Tor will
27764 run under. Implements ticket 3421; fix by Jérémy Bobbio.
27767 - Abort if tor_vasprintf fails in connection_printf_to_buf (a
27768 utility function used in the control-port code). This shouldn't
27769 ever happen unless Tor is completely out of memory, but if it did
27770 happen and Tor somehow recovered from it, Tor could have sent a log
27771 message to a control port in the middle of a reply to a controller
27772 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
27773 - Make 'FetchUselessDescriptors' cause all descriptor types and
27774 all consensus types (including microdescriptors) to get fetched.
27775 Fixes bug 3851; bugfix on 0.2.3.1-alpha.
27777 o Code refactoring:
27778 - Make a new "entry connection" struct as an internal subtype of "edge
27779 connection", to simplify the code and make exit connections smaller.
27782 Changes in version 0.2.2.33 - 2011-09-13
27783 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
27784 TLS handshake that makes relays and bridges that run this new version
27785 reachable from Iran again.
27788 - Avoid an assertion failure when reloading a configuration with
27789 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
27790 3923; bugfix on 0.2.2.25-alpha.
27792 o Minor features (security):
27793 - Check for replays of the public-key encrypted portion of an
27794 INTRODUCE1 cell, in addition to the current check for replays of
27795 the g^x value. This prevents a possible class of active attacks
27796 by an attacker who controls both an introduction point and a
27797 rendezvous point, and who uses the malleability of AES-CTR to
27798 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
27799 that these attacks are infeasible (requiring the attacker to send
27800 on the order of zettabytes of altered cells in a short interval),
27801 but we'd rather block them off in case there are any classes of
27802 this attack that we missed. Reported by Willem Pinckaers.
27805 - Adjust the expiration time on our SSL session certificates to
27806 better match SSL certs seen in the wild. Resolves ticket 4014.
27807 - Change the default required uptime for a relay to be accepted as
27808 a HSDir (hidden service directory) from 24 hours to 25 hours.
27809 Improves on 0.2.0.10-alpha; resolves ticket 2649.
27810 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
27811 authorities to abstain from voting on assignment of the HSDir
27812 consensus flag. Related to bug 2649.
27813 - Update to the September 6 2011 Maxmind GeoLite Country database.
27815 o Minor bugfixes (documentation and log messages):
27816 - Correct the man page to explain that HashedControlPassword and
27817 CookieAuthentication can both be set, in which case either method
27818 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
27819 when we decided to allow these config options to both be set. Issue
27820 raised by bug 3898.
27821 - Demote the 'replay detected' log message emitted when a hidden
27822 service receives the same Diffie-Hellman public key in two different
27823 INTRODUCE2 cells to info level. A normal Tor client can cause that
27824 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
27825 fixes part of bug 2442.
27826 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
27827 level. There is nothing that a hidden service's operator can do
27828 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
27830 - Clarify a log message specifying the characters permitted in
27831 HiddenServiceAuthorizeClient client names. Previously, the log
27832 message said that "[A-Za-z0-9+-_]" were permitted; that could have
27833 given the impression that every ASCII character between "+" and "_"
27834 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
27837 - Provide a substitute implementation of lround() for MSVC, which
27838 apparently lacks it. Patch from Gisle Vanem.
27839 - Clean up some code issues that prevented Tor from building on older
27840 BSDs. Fixes bug 3894; reported by "grarpamp".
27841 - Search for a platform-specific version of "ar" when cross-compiling.
27842 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
27845 Changes in version 0.2.3.3-alpha - 2011-09-01
27846 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
27847 security, and provides client-side support for the microdescriptor
27848 and optimistic data features introduced earlier in the 0.2.3.x
27849 series. It also includes numerous critical bugfixes in the (optional)
27850 bufferevent-based networking backend.
27852 o Major features (stream isolation):
27853 - You can now configure Tor so that streams from different
27854 applications are isolated on different circuits, to prevent an
27855 attacker who sees your streams as they leave an exit node from
27856 linking your sessions to one another. To do this, choose some way
27857 to distinguish the applications: have them connect to different
27858 SocksPorts, or have one of them use SOCKS4 while the other uses
27859 SOCKS5, or have them pass different authentication strings to the
27860 SOCKS proxy. Then, use the new SocksPort syntax to configure the
27861 degree of isolation you need. This implements Proposal 171.
27862 - There's a new syntax for specifying multiple client ports (such as
27863 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
27864 multiple *Port entries with full addr:port syntax on each.
27865 The old *ListenAddress format is still supported, but you can't
27866 mix it with the new *Port syntax.
27868 o Major features (other):
27869 - Enable microdescriptor fetching by default for clients. This allows
27870 clients to download a much smaller amount of directory information.
27871 To disable it (and go back to the old-style consensus and
27872 descriptors), set "UseMicrodescriptors 0" in your torrc file.
27873 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
27874 "PortForwarding" config option), now supports Windows.
27875 - When using an exit relay running 0.2.3.x, clients can now
27876 "optimistically" send data before the exit relay reports that
27877 the stream has opened. This saves a round trip when starting
27878 connections where the client speaks first (such as web browsing).
27879 This behavior is controlled by a consensus parameter (currently
27880 disabled). To turn it on or off manually, use the "OptimisticData"
27881 torrc option. Implements proposal 181; code by Ian Goldberg.
27883 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
27884 - When using IOCP on Windows, we need to enable Libevent windows
27886 - The IOCP backend now works even when the user has not specified
27887 the (internal, debugging-only) _UseFilteringSSLBufferevents option.
27888 Fixes part of bug 3752.
27889 - Correctly record the bytes we've read and written when using
27890 bufferevents, so that we can include them in our bandwidth history
27891 and advertised bandwidth. Fixes bug 3803.
27892 - Apply rate-limiting only at the bottom of a chain of filtering
27893 bufferevents. This prevents us from filling up internal read
27894 buffers and violating rate-limits when filtering bufferevents
27895 are enabled. Fixes part of bug 3804.
27896 - Add high-watermarks to the output buffers for filtered
27897 bufferevents. This prevents us from filling up internal write
27898 buffers and wasting CPU cycles when filtering bufferevents are
27899 enabled. Fixes part of bug 3804.
27900 - Correctly notice when data has been written from a bufferevent
27901 without flushing it completely. Fixes bug 3805.
27902 - Fix a bug where server-side tunneled bufferevent-based directory
27903 streams would get closed prematurely. Fixes bug 3814.
27904 - Fix a use-after-free error with per-connection rate-limiting
27905 buckets. Fixes bug 3888.
27907 o Major bugfixes (also part of 0.2.2.31-rc):
27908 - If we're configured to write our ControlPorts to disk, only write
27909 them after switching UID and creating the data directory. This way,
27910 we don't fail when starting up with a nonexistent DataDirectory
27911 and a ControlPortWriteToFile setting based on that directory. Fixes
27912 bug 3747; bugfix on Tor 0.2.2.26-beta.
27915 - Added a new CONF_CHANGED event so that controllers can be notified
27916 of any configuration changes made by other controllers, or by the
27917 user. Implements ticket 1692.
27918 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
27919 leak when using bufferevents, and lets Libevent worry about how to
27920 best copy data out of a buffer.
27921 - Replace files in stats/ rather than appending to them. Now that we
27922 include statistics in extra-info descriptors, it makes no sense to
27923 keep old statistics forever. Implements ticket 2930.
27925 o Minor features (build compatibility):
27926 - Limited, experimental support for building with nmake and MSVC.
27927 - Provide a substitute implementation of lround() for MSVC, which
27928 apparently lacks it. Patch from Gisle Vanem.
27930 o Minor features (also part of 0.2.2.31-rc):
27931 - Update to the August 2 2011 Maxmind GeoLite Country database.
27933 o Minor bugfixes (on 0.2.3.x-alpha):
27934 - Fix a spurious warning when parsing SOCKS requests with
27935 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
27936 - Get rid of a harmless warning that could happen on relays running
27937 with bufferevents. The warning was caused by someone doing an http
27938 request to a relay's orport. Also don't warn for a few related
27939 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
27941 o Minor bugfixes (on 2.2.x and earlier):
27942 - Correct the man page to explain that HashedControlPassword and
27943 CookieAuthentication can both be set, in which case either method
27944 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
27945 when we decided to allow these config options to both be set. Issue
27946 raised by bug 3898.
27947 - The "--quiet" and "--hush" options now apply not only to Tor's
27948 behavior before logs are configured, but also to Tor's behavior in
27949 the absence of configured logs. Fixes bug 3550; bugfix on
27952 o Minor bugfixes (also part of 0.2.2.31-rc):
27953 - Write several files in text mode, on OSes that distinguish text
27954 mode from binary mode (namely, Windows). These files are:
27955 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
27956 that collect those statistics; 'client_keys' and 'hostname' for
27957 hidden services that use authentication; and (in the tor-gencert
27958 utility) newly generated identity and signing keys. Previously,
27959 we wouldn't specify text mode or binary mode, leading to an
27960 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
27961 the DirRecordUsageByCountry option which would have triggered
27962 the assertion failure was added), although this assertion failure
27963 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
27964 - Selectively disable deprecation warnings on OS X because Lion
27965 started deprecating the shipped copy of openssl. Fixes bug 3643.
27966 - Remove an extra pair of quotation marks around the error
27967 message in control-port STATUS_GENERAL BUG events. Bugfix on
27968 0.1.2.6-alpha; fixes bug 3732.
27969 - When unable to format an address as a string, report its value
27970 as "???" rather than reusing the last formatted address. Bugfix
27973 o Code simplifications and refactoring:
27974 - Rewrite the listener-selection logic so that parsing which ports
27975 we want to listen on is now separate from binding to the ports
27979 - Building Tor with bufferevent support now requires Libevent
27980 2.0.13-stable or later. Previous versions of Libevent had bugs in
27981 SSL-related bufferevents and related issues that would make Tor
27982 work badly with bufferevents. Requiring 2.0.13-stable also allows
27983 Tor with bufferevents to take advantage of Libevent APIs
27984 introduced after 2.0.8-rc.
27987 Changes in version 0.2.2.32 - 2011-08-27
27988 The Tor 0.2.2 release series is dedicated to the memory of Andreas
27989 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
27990 a founder of the PETS community, a leader in our field, a mentor,
27991 and a friend. He left us with these words: "I had the possibility
27992 to contribute to this world that is not as it should be. I hope I
27993 could help in some areas to make the world a better place, and that
27994 I could also encourage other people to be engaged in improving the
27995 world. Please, stay engaged. This world needs you, your love, your
27996 initiative -- now I cannot be part of that anymore."
27998 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
27999 ready. More than two years in the making, this release features improved
28000 client performance and hidden service reliability, better compatibility
28001 for Android, correct behavior for bridges that listen on more than
28002 one address, more extensible and flexible directory object handling,
28003 better reporting of network statistics, improved code security, and
28004 many many other features and bugfixes.
28007 Changes in version 0.2.2.31-rc - 2011-08-17
28008 Tor 0.2.2.31-rc is the second and hopefully final release candidate
28009 for the Tor 0.2.2.x series.
28012 - Remove an extra pair of quotation marks around the error
28013 message in control-port STATUS_GENERAL BUG events. Bugfix on
28014 0.1.2.6-alpha; fixes bug 3732.
28015 - If we're configured to write our ControlPorts to disk, only write
28016 them after switching UID and creating the data directory. This way,
28017 we don't fail when starting up with a nonexistent DataDirectory
28018 and a ControlPortWriteToFile setting based on that directory. Fixes
28019 bug 3747; bugfix on Tor 0.2.2.26-beta.
28022 - Update to the August 2 2011 Maxmind GeoLite Country database.
28025 - Allow GETINFO fingerprint to return a fingerprint even when
28026 we have not yet built a router descriptor. Fixes bug 3577;
28027 bugfix on 0.2.0.1-alpha.
28028 - Write several files in text mode, on OSes that distinguish text
28029 mode from binary mode (namely, Windows). These files are:
28030 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
28031 that collect those statistics; 'client_keys' and 'hostname' for
28032 hidden services that use authentication; and (in the tor-gencert
28033 utility) newly generated identity and signing keys. Previously,
28034 we wouldn't specify text mode or binary mode, leading to an
28035 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
28036 the DirRecordUsageByCountry option which would have triggered
28037 the assertion failure was added), although this assertion failure
28038 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
28039 - Selectively disable deprecation warnings on OS X because Lion
28040 started deprecating the shipped copy of openssl. Fixes bug 3643.
28041 - When unable to format an address as a string, report its value
28042 as "???" rather than reusing the last formatted address. Bugfix
28046 Changes in version 0.2.3.2-alpha - 2011-07-18
28047 Tor 0.2.3.2-alpha introduces two new experimental features:
28048 microdescriptors and pluggable transports. It also continues cleaning
28049 up a variety of recently introduced features.
28052 - Clients can now use microdescriptors instead of regular descriptors
28053 to build circuits. Microdescriptors are authority-generated
28054 summaries of regular descriptors' contents, designed to change
28055 very rarely (see proposal 158 for details). This feature is
28056 designed to save bandwidth, especially for clients on slow internet
28057 connections. It's off by default for now, since nearly no caches
28058 support it, but it will be on-by-default for clients in a future
28059 version. You can use the UseMicrodescriptors option to turn it on.
28060 - Tor clients using bridges can now be configured to use a separate
28061 'transport' proxy for each bridge. This approach helps to resist
28062 censorship by allowing bridges to use protocol obfuscation
28063 plugins. It implements part of proposal 180. Implements ticket 2841.
28064 - While we're trying to bootstrap, record how many TLS connections
28065 fail in each state, and report which states saw the most failures
28066 in response to any bootstrap failures. This feature may speed up
28067 diagnosis of censorship events. Implements ticket 3116.
28069 o Major bugfixes (on 0.2.3.1-alpha):
28070 - When configuring a large set of nodes in EntryNodes (as with
28071 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
28072 random subset to be guards, and choose them in random
28073 order. Fixes bug 2798.
28074 - Tor could crash when remembering a consensus in a non-used consensus
28075 flavor without having a current consensus set. Fixes bug 3361.
28076 - Comparing an unknown address to a microdescriptor's shortened exit
28077 policy would always give a "rejected" result. Fixes bug 3599.
28078 - Using microdescriptors as a client no longer prevents Tor from
28079 uploading and downloading hidden service descriptors. Fixes
28083 - Allow nameservers with IPv6 address. Resolves bug 2574.
28084 - Accept attempts to include a password authenticator in the
28085 handshake, as supported by SOCKS5. This handles SOCKS clients that
28086 don't know how to omit a password when authenticating. Resolves
28088 - When configuring a large set of nodes in EntryNodes, and there are
28089 enough of them listed as Guard so that we don't need to consider
28090 the non-guard entries, prefer the ones listed with the Guard flag.
28091 - Check for and recover from inconsistency in the microdescriptor
28092 cache. This will make it harder for us to accidentally free a
28093 microdescriptor without removing it from the appropriate data
28094 structures. Fixes issue 3135; issue noted by "wanoskarnet".
28095 - Log SSL state transitions at log level DEBUG, log domain
28096 HANDSHAKE. This can be useful for debugging censorship events.
28097 Implements ticket 3264.
28098 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
28099 implements ticket 3439.
28101 o Minor bugfixes (on 0.2.3.1-alpha):
28102 - Do not free all general-purpose regular descriptors just
28103 because microdescriptor use is enabled. Fixes bug 3113.
28104 - Correctly link libevent_openssl when --enable-static-libevent
28105 is passed to configure. Fixes bug 3118.
28106 - Bridges should not complain during their heartbeat log messages that
28107 they are unlisted in the consensus: that's more or less the point
28108 of being a bridge. Fixes bug 3183.
28109 - Report a SIGNAL event to controllers when acting on a delayed
28110 SIGNAL NEWNYM command. Previously, we would report a SIGNAL
28111 event to the controller if we acted on a SIGNAL NEWNYM command
28112 immediately, and otherwise not report a SIGNAL event for the
28113 command at all. Fixes bug 3349.
28114 - Fix a crash when handling the SIGNAL controller command or
28115 reporting ERR-level status events with bufferevents enabled. Found
28116 by Robert Ransom. Fixes bug 3367.
28117 - Always ship the tor-fw-helper manpage in our release tarballs.
28118 Fixes bug 3389. Reported by Stephen Walker.
28119 - Fix a class of double-mark-for-close bugs when bufferevents
28120 are enabled. Fixes bug 3403.
28121 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
28122 - Add SIGNAL to the list returned by the 'GETINFO events/names'
28123 control-port command. Fixes part of bug 3465.
28124 - Prevent using negative indices during unit test runs when read_all()
28125 fails. Spotted by coverity.
28126 - Fix a rare memory leak when checking the nodelist without it being
28127 present. Found by coverity.
28128 - Only try to download a microdescriptor-flavored consensus from
28129 a directory cache that provides them.
28131 o Minor bugfixes (on 0.2.2.x and earlier):
28132 - Assert that hidden-service-related operations are not performed
28133 using single-hop circuits. Previously, Tor would assert that
28134 client-side streams are not attached to single-hop circuits,
28135 but not that other sensitive operations on the client and service
28136 side are not performed using single-hop circuits. Fixes bug 3332;
28138 - Don't publish a new relay descriptor when we reload our onion key,
28139 unless the onion key has actually changed. Fixes bug 3263 and
28140 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
28141 - Allow GETINFO fingerprint to return a fingerprint even when
28142 we have not yet built a router descriptor. Fixes bug 3577;
28143 bugfix on 0.2.0.1-alpha.
28144 - Make 'tor --digests' list hashes of all Tor source files. Bugfix
28145 on 0.2.2.4-alpha; fixes bug 3427.
28147 o Code simplification and refactoring:
28148 - Use tor_sscanf() in place of scanf() in more places through the
28149 code. This makes us a little more locale-independent, and
28150 should help shut up code-analysis tools that can't tell
28151 a safe sscanf string from a dangerous one.
28152 - Use tt_assert(), not tor_assert(), for checking for test failures.
28153 This makes the unit tests more able to go on in the event that
28155 - Split connection_about_to_close() into separate functions for each
28159 - On Windows, we now define the _WIN32_WINNT macros only if they
28160 are not already defined. This lets the person building Tor decide,
28161 if they want, to require a later version of Windows.
28164 Changes in version 0.2.2.30-rc - 2011-07-07
28165 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
28166 series. It fixes a few smaller bugs, but generally appears stable.
28167 Please test it and let us know whether it is!
28170 - Send a SUCCEEDED stream event to the controller when a reverse
28171 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
28172 discovered by katmagic.
28173 - Always NUL-terminate the sun_path field of a sockaddr_un before
28174 passing it to the kernel. (Not a security issue: kernels are
28175 smart enough to reject bad sockaddr_uns.) Found by Coverity;
28176 CID #428. Bugfix on Tor 0.2.0.3-alpha.
28177 - Don't stack-allocate the list of supplementary GIDs when we're
28178 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
28179 could take up to 256K, which is way too much stack. Found by
28180 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
28181 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
28182 events/names' control-port command. Bugfix on 0.2.2.9-alpha;
28183 fixes part of bug 3465.
28184 - Fix a memory leak when receiving a descriptor for a hidden
28185 service we didn't ask for. Found by Coverity; CID #30. Bugfix
28189 - Update to the July 1 2011 Maxmind GeoLite Country database.
28192 Changes in version 0.2.2.29-beta - 2011-06-20
28193 Tor 0.2.2.29-beta reverts an accidental behavior change for users who
28194 have bridge lines in their torrc but don't want to use them; gets
28195 us closer to having the control socket feature working on Debian;
28196 and fixes a variety of smaller bugs.
28199 - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
28200 When we changed the default behavior to "use bridges if any
28201 are listed in the torrc", we surprised users who had bridges
28202 in their torrc files but who didn't actually want to use them.
28203 Partial resolution for bug 3354.
28206 - Don't attach new streams to old rendezvous circuits after SIGNAL
28207 NEWNYM. Previously, we would keep using an existing rendezvous
28208 circuit if it remained open (i.e. if it were kept open by a
28209 long-lived stream, or if a new stream were attached to it before
28210 Tor could notice that it was old and no longer in use). Bugfix on
28211 0.1.1.15-rc; fixes bug 3375.
28214 - Fix a bug when using ControlSocketsGroupWritable with User. The
28215 directory's group would be checked against the current group, not
28216 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
28217 bugfix on 0.2.2.26-beta.
28218 - Make connection_printf_to_buf()'s behavior sane. Its callers
28219 expect it to emit a CRLF iff the format string ends with CRLF;
28220 it actually emitted a CRLF iff (a) the format string ended with
28221 CRLF or (b) the resulting string was over 1023 characters long or
28222 (c) the format string did not end with CRLF *and* the resulting
28223 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
28224 fixes part of bug 3407.
28225 - Make send_control_event_impl()'s behavior sane. Its callers
28226 expect it to always emit a CRLF at the end of the string; it
28227 might have emitted extra control characters as well. Bugfix on
28228 0.1.1.9-alpha; fixes another part of bug 3407.
28229 - Make crypto_rand_int() check the value of its input correctly.
28230 Previously, it accepted values up to UINT_MAX, but could return a
28231 negative number if given a value above INT_MAX+1. Found by George
28232 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
28233 - Avoid a segfault when reading a malformed circuit build state
28234 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
28236 - When asked about a DNS record type we don't support via a
28237 client DNSPort, reply with NOTIMPL rather than an empty
28238 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
28239 - Fix a rare memory leak during stats writing. Found by coverity.
28242 - Update to the June 1 2011 Maxmind GeoLite Country database.
28244 o Code simplifications and refactoring:
28245 - Remove some dead code as indicated by coverity.
28246 - Remove a few dead assignments during router parsing. Found by
28248 - Add some forgotten return value checks during unit tests. Found
28250 - Don't use 1-bit wide signed bit fields. Found by coverity.
28253 Changes in version 0.2.2.28-beta - 2011-06-04
28254 Tor 0.2.2.28-beta makes great progress towards a new stable release: we
28255 fixed a big bug in whether relays stay in the consensus consistently,
28256 we moved closer to handling bridges and hidden services correctly,
28257 and we started the process of better handling the dreaded "my Vidalia
28258 died, and now my Tor demands a password when I try to reconnect to it"
28262 - Don't decide to make a new descriptor when receiving a HUP signal.
28263 This bug has caused a lot of 0.2.2.x relays to disappear from the
28264 consensus periodically. Fixes the most common case of triggering
28265 bug 1810; bugfix on 0.2.2.7-alpha.
28266 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
28267 - Don't try to build descriptors if "ORPort auto" is set and we
28268 don't know our actual ORPort yet. Fix for bug 3216; bugfix on
28270 - Resolve a crash that occurred when setting BridgeRelay to 1 with
28271 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
28272 - Apply circuit timeouts to opened hidden-service-related circuits
28273 based on the correct start time. Previously, we would apply the
28274 circuit build timeout based on time since the circuit's creation;
28275 it was supposed to be applied based on time since the circuit
28276 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
28277 - Use the same circuit timeout for client-side introduction
28278 circuits as for other four-hop circuits, rather than the timeout
28279 for single-hop directory-fetch circuits; the shorter timeout may
28280 have been appropriate with the static circuit build timeout in
28281 0.2.1.x and earlier, but caused many hidden service access attempts
28282 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
28283 on 0.2.2.2-alpha; fixes another part of bug 1297.
28284 - In ticket 2511 we fixed a case where you could use an unconfigured
28285 bridge if you had configured it as a bridge the last time you ran
28286 Tor. Now fix another edge case: if you had configured it as a bridge
28287 but then switched to a different bridge via the controller, you
28288 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
28292 - Add an __OwningControllerProcess configuration option and a
28293 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
28294 that when it exits, Tor will shut down. Implements feature 3049.
28295 - If "UseBridges 1" is set and no bridges are configured, Tor will
28296 now refuse to build any circuits until some bridges are set.
28297 If "UseBridges auto" is set, Tor will use bridges if they are
28298 configured and we are not running as a server, but otherwise will
28299 make circuits as usual. The new default is "auto". Patch by anonym,
28300 so the Tails LiveCD can stop automatically revealing you as a Tor
28304 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
28305 - Remove a trailing asterisk from "exit-policy/default" in the
28306 output of the control port command "GETINFO info/names". Bugfix
28308 - Use a wide type to hold sockets when built for 64-bit Windows builds.
28310 - Warn when the user configures two HiddenServiceDir lines that point
28311 to the same directory. Bugfix on 0.0.6 (the version introducing
28312 HiddenServiceDir); fixes bug 3289.
28313 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
28314 part of bug 2748; bugfix on 0.2.0.10-alpha.
28315 - Log malformed requests for rendezvous descriptors as protocol
28316 warnings, not warnings. Also, use a more informative log message
28317 in case someone sees it at log level warning without prior
28318 info-level messages. Fixes the other part of bug 2748; bugfix
28320 - Clear the table recording the time of the last request for each
28321 hidden service descriptor from each HS directory on SIGNAL NEWNYM.
28322 Previously, we would clear our HS descriptor cache on SIGNAL
28323 NEWNYM, but if we had previously retrieved a descriptor (or tried
28324 to) from every directory responsible for it, we would refuse to
28325 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
28327 - Fix a log message that said "bits" while displaying a value in
28328 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
28330 - When checking for 1024-bit keys, check for 1024 bits, not 128
28331 bytes. This allows Tor to correctly discard keys of length 1017
28332 through 1023. Bugfix on 0.0.9pre5.
28335 - Relays now log the reason for publishing a new relay descriptor,
28336 so we have a better chance of hunting down instances of bug 1810.
28337 Resolves ticket 3252.
28338 - Revise most log messages that refer to nodes by nickname to
28339 instead use the "$key=nickname at address" format. This should be
28340 more useful, especially since nicknames are less and less likely
28341 to be unique. Resolves ticket 3045.
28342 - Log (at info level) when purging pieces of hidden-service-client
28343 state because of SIGNAL NEWNYM.
28346 - Remove undocumented option "-F" from tor-resolve: it hasn't done
28347 anything since 0.2.1.16-rc.
28350 Changes in version 0.2.2.27-beta - 2011-05-18
28351 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
28352 release, and also adds a few more general bugfixes.
28355 - Fix a crash bug when changing bridges in a running Tor process.
28356 Fixes bug 3213; bugfix on 0.2.2.26-beta.
28357 - When the controller configures a new bridge, don't wait 10 to 60
28358 seconds before trying to fetch its descriptor. Bugfix on
28359 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
28362 - Require that onion keys have exponent 65537 in microdescriptors too.
28363 Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
28364 - Tor used to limit HttpProxyAuthenticator values to 48 characters.
28365 Changed the limit to 512 characters by removing base64 newlines.
28366 Fixes bug 2752. Fix by Michael Yakubovich.
28367 - When a client starts or stops using bridges, never use a circuit
28368 that was built before the configuration change. This behavior could
28369 put at risk a user who uses bridges to ensure that her traffic
28370 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
28374 Changes in version 0.2.2.26-beta - 2011-05-17
28375 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
28376 also introduces a new "socksport auto" approach that should make it
28377 easier to run multiple Tors on the same system, and does a lot of
28378 cleanup to get us closer to a release candidate.
28380 o Security/privacy fixes:
28381 - Replace all potentially sensitive memory comparison operations
28382 with versions whose runtime does not depend on the data being
28383 compared. This will help resist a class of attacks where an
28384 adversary can use variations in timing information to learn
28385 sensitive data. Fix for one case of bug 3122. (Safe memcmp
28386 implementation by Robert Ransom based partially on code by DJB.)
28387 - When receiving a hidden service descriptor, check that it is for
28388 the hidden service we wanted. Previously, Tor would store any
28389 hidden service descriptors that a directory gave it, whether it
28390 wanted them or not. This wouldn't have let an attacker impersonate
28391 a hidden service, but it did let directories pre-seed a client
28392 with descriptors that it didn't want. Bugfix on 0.0.6.
28393 - On SIGHUP, do not clear out all TrackHostExits mappings, client
28394 DNS cache entries, and virtual address mappings: that's what
28395 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
28398 - The options SocksPort, ControlPort, and so on now all accept a
28399 value "auto" that opens a socket on an OS-selected port. A
28400 new ControlPortWriteToFile option tells Tor to write its
28401 actual control port or ports to a chosen file. If the option
28402 ControlPortFileGroupReadable is set, the file is created as
28403 group-readable. Now users can run two Tor clients on the same
28404 system without needing to manually mess with parameters. Resolves
28405 part of ticket 3076.
28406 - Set SO_REUSEADDR on all sockets, not just listeners. This should
28407 help busy exit nodes avoid running out of useable ports just
28408 because all the ports have been used in the near past. Resolves
28412 - New "GETINFO net/listeners/(type)" controller command to return
28413 a list of addresses and ports that are bound for listeners for a
28414 given connection type. This is useful when the user has configured
28415 "SocksPort auto" and the controller needs to know which port got
28416 chosen. Resolves another part of ticket 3076.
28417 - Add a new ControlSocketsGroupWritable configuration option: when
28418 it is turned on, ControlSockets are group-writeable by the default
28419 group of the current user. Patch by Jérémy Bobbio; implements
28421 - Tor now refuses to create a ControlSocket in a directory that is
28422 world-readable (or group-readable if ControlSocketsGroupWritable
28423 is 0). This is necessary because some operating systems do not
28424 enforce permissions on an AF_UNIX sockets. Permissions on the
28425 directory holding the socket, however, seems to work everywhere.
28426 - Rate-limit a warning about failures to download v2 networkstatus
28427 documents. Resolves part of bug 1352.
28428 - Backport code from 0.2.3.x that allows directory authorities to
28429 clean their microdescriptor caches. Needed to resolve bug 2230.
28430 - When an HTTPS proxy reports "403 Forbidden", we now explain
28431 what it means rather than calling it an unexpected status code.
28432 Closes bug 2503. Patch from Michael Yakubovich.
28433 - Update to the May 1 2011 Maxmind GeoLite Country database.
28436 - Authorities now clean their microdesc cache periodically and when
28437 reading from disk initially, not only when adding new descriptors.
28438 This prevents a bug where we could lose microdescriptors. Bugfix
28439 on 0.2.2.6-alpha. Fixes bug 2230.
28440 - Do not crash when our configuration file becomes unreadable, for
28441 example due to a permissions change, between when we start up
28442 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
28444 - Avoid a bug that would keep us from replacing a microdescriptor
28445 cache on Windows. (We would try to replace the file while still
28446 holding it open. That's fine on Unix, but Windows doesn't let us
28447 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
28448 - Add missing explanations for the authority-related torrc options
28449 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
28450 man page. Resolves issue 2379.
28451 - As an authority, do not upload our own vote or signature set to
28452 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
28453 it would get flagged as a duplicate. Resolves bug 3026.
28454 - Accept hidden service descriptors if we think we might be a hidden
28455 service directory, regardless of what our consensus says. This
28456 helps robustness, since clients and hidden services can sometimes
28457 have a more up-to-date view of the network consensus than we do,
28458 and if they think that the directory authorities list us a HSDir,
28459 we might actually be one. Related to bug 2732; bugfix on
28461 - When a controller changes TrackHostExits, remove mappings for
28462 hosts that should no longer have their exits tracked. Bugfix on
28464 - When a controller changes VirtualAddrNetwork, remove any mappings
28465 for hosts that were automapped to the old network. Bugfix on
28467 - When a controller changes one of the AutomapHosts* options, remove
28468 any mappings for hosts that should no longer be automapped. Bugfix
28470 - Do not reset the bridge descriptor download status every time we
28471 re-parse our configuration or get a configuration change. Fixes
28472 bug 3019; bugfix on 0.2.0.3-alpha.
28474 o Minor bugfixes (code cleanup):
28475 - When loading the microdesc journal, remember its current size.
28476 In 0.2.2, this helps prevent the microdesc journal from growing
28477 without limit on authorities (who are the only ones to use it in
28478 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
28479 Fix posted by "cypherpunks."
28480 - The microdesc journal is supposed to get rebuilt only if it is
28481 at least _half_ the length of the store, not _twice_ the length
28482 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
28483 - Fix a potential null-pointer dereference while computing a
28484 consensus. Bugfix on 0.2.0.3-alpha, found with the help of
28486 - Avoid a possible null-pointer dereference when rebuilding the mdesc
28487 cache without actually having any descriptors to cache. Bugfix on
28488 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
28489 - If we fail to compute the identity digest of a v3 legacy keypair,
28490 warn, and don't use a buffer-full of junk instead. Bugfix on
28491 0.2.1.1-alpha; fixes bug 3106.
28492 - Resolve an untriggerable issue in smartlist_string_num_isin(),
28493 where if the function had ever in the future been used to check
28494 for the presence of a too-large number, it would have given an
28495 incorrect result. (Fortunately, we only used it for 16-bit
28496 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
28497 - Require that introduction point keys and onion handshake keys
28498 have a public exponent of 65537. Starts to fix bug 3207; bugfix
28501 o Removed features:
28502 - Caches no longer download and serve v2 networkstatus documents
28503 unless FetchV2Networkstatus flag is set: these documents haven't
28504 haven't been used by clients or relays since 0.2.0.x. Resolves
28508 Changes in version 0.2.3.1-alpha - 2011-05-05
28509 Tor 0.2.3.1-alpha adds some new experimental features, including support
28510 for an improved network IO backend, IOCP networking on Windows,
28511 microdescriptor caching, "fast-start" support for streams, and automatic
28512 home router configuration. There are also numerous internal improvements
28513 to try to make the code easier for developers to work with.
28515 This is the first alpha release in a new series, so expect there to be
28516 bugs. Users who would rather test out a more stable branch should
28517 stay with 0.2.2.x for now.
28520 - Tor can now optionally build with the "bufferevents" buffered IO
28521 backend provided by Libevent 2. To use this feature, make sure you
28522 have the latest possible version of Libevent, and pass the
28523 --enable-bufferevents flag to configure when building Tor from
28524 source. This feature will make our networking code more flexible,
28525 let us stack layers on each other, and let us use more efficient
28526 zero-copy transports where available.
28527 - As an experimental feature, Tor can use IOCP for networking on Windows.
28528 Once this code is tuned and optimized, it promises much better
28529 performance than the select-based backend we've used in the past. To
28530 try this feature, you must build Tor with Libevent 2, configure Tor
28531 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
28532 your torrc. There are known bugs here: only try this if you can help
28533 debug it as it breaks.
28534 - The EntryNodes option can now include country codes like {de} or IP
28535 addresses or network masks. Previously we had disallowed these options
28536 because we didn't have an efficient way to keep the list up to
28537 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
28538 - Exit nodes now accept and queue data on not-yet-connected streams.
28539 Previously, the client wasn't allowed to send data until the stream was
28540 connected, which slowed down all connections. This change will enable
28541 clients to perform a "fast-start" on streams and send data without
28542 having to wait for a confirmation that the stream has opened. (Patch
28543 from Ian Goldberg; implements the server side of Proposal 174.)
28544 - Tor now has initial support for automatic port mapping on the many
28545 home routers that support NAT-PMP or UPnP. (Not yet supported on
28546 Windows). To build the support code, you'll need to have libnatpnp
28547 library and/or the libminiupnpc library, and you'll need to enable the
28548 feature specifically by passing "--enable-upnp" and/or
28549 "--enable-natpnp" to configure. To turn it on, use the new
28550 PortForwarding option.
28551 - Caches now download, cache, and serve multiple "flavors" of the
28552 consensus, including a flavor that describes microdescriptors.
28553 - Caches now download, cache, and serve microdescriptors -- small
28554 summaries of router descriptors that are authenticated by all of the
28555 directory authorities. Once enough caches are running this code,
28556 clients will be able to save significant amounts of directory bandwidth
28557 by downloading microdescriptors instead of router descriptors.
28560 - Make logging resolution configurable with a new LogTimeGranularity
28561 option, and change the default from 1 millisecond to 1 second.
28562 Implements enhancement 1668.
28563 - We log which torrc file we're using on startup. Implements ticket
28565 - Ordinarily, Tor does not count traffic from private addresses (like
28566 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
28567 There is now a new option, CountPrivateBandwidth, to disable this
28568 behavior. Patch from Daniel Cagara.
28569 - New --enable-static-tor configure option for building Tor as
28570 statically as possible. Idea, general hackery and thoughts from
28571 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
28573 - If you set the NumCPUs option to 0, Tor will now try to detect how
28574 many CPUs you have. This is the new default behavior.
28575 - Turn on directory request statistics by default and include them in
28576 extra-info descriptors. Don't break if we have no GeoIP database.
28577 - Relays that set "ConnDirectionStatistics 1" write statistics on the
28578 bidirectional use of connections to disk every 24 hours.
28579 - Add a GeoIP file digest to the extra-info descriptor. Implements
28581 - The NodeFamily option -- which let you declare that you want to
28582 consider nodes to be part of a family whether they list themselves
28583 that way or not -- now allows IP address ranges and country codes.
28584 - Add a new 'Heartbeat' log message type to periodically log a message
28585 describing Tor's status at level Notice. This feature is meant for
28586 operators who log at notice, and want to make sure that their Tor
28587 server is still working. Implementation by George Kadianakis.
28589 o Minor bugfixes (on 0.2.2.25-alpha):
28590 - When loading the microdesc journal, remember its current size.
28591 In 0.2.2, this helps prevent the microdesc journal from growing
28592 without limit on authorities (who are the only ones to use it in
28593 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
28594 Fix posted by "cypherpunks."
28595 - The microdesc journal is supposed to get rebuilt only if it is
28596 at least _half_ the length of the store, not _twice_ the length
28597 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
28598 - If as an authority we fail to compute the identity digest of a v3
28599 legacy keypair, warn, and don't use a buffer-full of junk instead.
28600 Bugfix on 0.2.1.1-alpha; fixes bug 3106.
28601 - Authorities now clean their microdesc cache periodically and when
28602 reading from disk initially, not only when adding new descriptors.
28603 This prevents a bug where we could lose microdescriptors. Bugfix
28606 o Minor features (controller):
28607 - Add a new SIGNAL event to the controller interface so that
28608 controllers can be notified when Tor handles a signal. Resolves
28609 issue 1955. Patch by John Brooks.
28610 - Add a new GETINFO option to get total bytes read and written. Patch
28611 from pipe, revised by atagar. Resolves ticket 2345.
28612 - Implement some GETINFO controller fields to provide information about
28613 the Tor process's pid, euid, username, and resource limits.
28616 - Our build system requires automake 1.6 or later to create the
28617 Makefile.in files. Previously, you could have used 1.4.
28618 This only affects developers and people building Tor from git;
28619 people who build Tor from the source distribution without changing
28620 the Makefile.am files should be fine.
28621 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
28622 so on. This is more robust against some of the failure modes
28623 associated with running the autotools pieces on their own.
28625 o Minor packaging issues:
28626 - On OpenSUSE, create the /var/run/tor directory on startup if it is not
28627 already created. Patch from Andreas Stieger. Fixes bug 2573.
28629 o Code simplifications and refactoring:
28630 - A major revision to our internal node-selecting and listing logic.
28631 Tor already had at least two major ways to look at the question of
28632 "which Tor servers do we know about": a list of router descriptors,
28633 and a list of entries in the current consensus. With
28634 microdescriptors, we're adding a third. Having so many systems
28635 without an abstraction layer over them was hurting the codebase.
28636 Now, we have a new "node_t" abstraction that presents a consistent
28637 interface to a client's view of a Tor node, and holds (nearly) all
28638 of the mutable state formerly in routerinfo_t and routerstatus_t.
28639 - The helper programs tor-gencert, tor-resolve, and tor-checkkey
28640 no longer link against Libevent: they never used it, but
28641 our library structure used to force them to link it.
28643 o Removed features:
28644 - Remove some old code to work around even older versions of Tor that
28645 used forked processes to handle DNS requests. Such versions of Tor
28646 are no longer in use as servers.
28648 o Documentation fixes:
28649 - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
28650 - Add missing documentation for the authority-related torrc options
28651 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
28655 Changes in version 0.2.2.25-alpha - 2011-04-29
28656 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
28657 robust, routers no longer overreport their bandwidth, Win7 should crash
28658 a little less, and NEWNYM (as used by Vidalia's "new identity" button)
28659 now prevents hidden service-related activity from being linkable. It
28660 provides more information to Vidalia so you can see if your bridge is
28661 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
28662 StrictNodes configuration options to make them more reliable, more
28663 understandable, and more regularly applied. If you use those options,
28664 please see the revised documentation for them in the manual page.
28667 - Relays were publishing grossly inflated bandwidth values because
28668 they were writing their state files wrong--now they write the
28669 correct value. Also, resume reading bandwidth history from the
28670 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
28671 - Improve hidden service robustness: When we find that we have
28672 extended a hidden service's introduction circuit to a relay not
28673 listed as an introduction point in the HS descriptor we currently
28674 have, retry with an introduction point from the current
28675 descriptor. Previously we would just give up. Fixes bugs 1024 and
28676 1930; bugfix on 0.2.0.10-alpha.
28677 - Clients now stop trying to use an exit node associated with a given
28678 destination by TrackHostExits if they fail to reach that exit node.
28679 Fixes bug 2999. Bugfix on 0.2.0.20-rc.
28680 - Fix crash bug on platforms where gmtime and localtime can return
28681 NULL. Windows 7 users were running into this one. Fixes part of bug
28682 2077. Bugfix on all versions of Tor. Found by boboper.
28684 o Security and stability fixes:
28685 - Don't double-free a parsable, but invalid, microdescriptor, even if
28686 it is followed in the blob we're parsing by an unparsable
28687 microdescriptor. Fixes an issue reported in a comment on bug 2954.
28688 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
28689 - If the Nickname configuration option isn't given, Tor would pick a
28690 nickname based on the local hostname as the nickname for a relay.
28691 Because nicknames are not very important in today's Tor and the
28692 "Unnamed" nickname has been implemented, this is now problematic
28693 behavior: It leaks information about the hostname without being
28694 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
28695 introduced the Unnamed nickname. Reported by tagnaq.
28696 - Fix an uncommon assertion failure when running with DNSPort under
28697 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
28698 - Avoid linkability based on cached hidden service descriptors: forget
28699 all hidden service descriptors cached as a client when processing a
28700 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
28703 - Export GeoIP information on bridge usage to controllers even if we
28704 have not yet been running for 24 hours. Now Vidalia bridge operators
28705 can get more accurate and immediate feedback about their
28706 contributions to the network.
28708 o Major features and bugfixes (node selection):
28709 - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
28710 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
28711 options. Previously, we had been ambiguous in describing what
28712 counted as an "exit" node, and what operations exactly "StrictNodes
28713 0" would permit. This created confusion when people saw nodes built
28714 through unexpected circuits, and made it hard to tell real bugs from
28715 surprises. Now the intended behavior is:
28716 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
28717 a node that delivers user traffic outside the Tor network.
28718 . "Entry", in the context of EntryNodes, means a node used as the
28719 first hop of a multihop circuit. It doesn't include direct
28720 connections to directory servers.
28721 . "ExcludeNodes" applies to all nodes.
28722 . "StrictNodes" changes the behavior of ExcludeNodes only. When
28723 StrictNodes is set, Tor should avoid all nodes listed in
28724 ExcludeNodes, even when it will make user requests fail. When
28725 StrictNodes is *not* set, then Tor should follow ExcludeNodes
28726 whenever it can, except when it must use an excluded node to
28727 perform self-tests, connect to a hidden service, provide a
28728 hidden service, fulfill a .exit request, upload directory
28729 information, or fetch directory information.
28730 Collectively, the changes to implement the behavior fix bug 1090.
28731 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
28732 a node is listed in both, it's treated as excluded.
28733 - ExcludeNodes now applies to directory nodes -- as a preference if
28734 StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
28735 Don't exclude all the directory authorities and set StrictNodes to 1
28736 unless you really want your Tor to break.
28737 - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
28738 - ExcludeExitNodes now overrides .exit requests.
28739 - We don't use bridges listed in ExcludeNodes.
28740 - When StrictNodes is 1:
28741 . We now apply ExcludeNodes to hidden service introduction points
28742 and to rendezvous points selected by hidden service users. This
28743 can make your hidden service less reliable: use it with caution!
28744 . If we have used ExcludeNodes on ourself, do not try relay
28745 reachability self-tests.
28746 . If we have excluded all the directory authorities, we will not
28747 even try to upload our descriptor if we're a relay.
28748 . Do not honor .exit requests to an excluded node.
28749 - Remove a misfeature that caused us to ignore the Fast/Stable flags
28750 when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
28751 - When the set of permitted nodes changes, we now remove any mappings
28752 introduced via TrackExitHosts to now-excluded nodes. Bugfix on
28754 - We never cannibalize a circuit that had excluded nodes on it, even
28755 if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
28756 - Revert a change where we would be laxer about attaching streams to
28757 circuits than when building the circuits. This was meant to prevent
28758 a set of bugs where streams were never attachable, but our improved
28759 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
28760 - Keep track of how many times we launch a new circuit to handle a
28761 given stream. Too many launches could indicate an inconsistency
28762 between our "launch a circuit to handle this stream" logic and our
28763 "attach this stream to one of the available circuits" logic.
28764 - Improve log messages related to excluded nodes.
28767 - Fix a spurious warning when moving from a short month to a long
28768 month on relays with month-based BandwidthAccounting. Bugfix on
28769 0.2.2.17-alpha; fixes bug 3020.
28770 - When a client finds that an origin circuit has run out of 16-bit
28771 stream IDs, we now mark it as unusable for new streams. Previously,
28772 we would try to close the entire circuit. Bugfix on 0.0.6.
28773 - Add a forgotten cast that caused a compile warning on OS X 10.6.
28774 Bugfix on 0.2.2.24-alpha.
28775 - Be more careful about reporting the correct error from a failed
28776 connect() system call. Under some circumstances, it was possible to
28777 look at an incorrect value for errno when sending the end reason.
28778 Bugfix on 0.1.0.1-rc.
28779 - Correctly handle an "impossible" overflow cases in connection byte
28780 counting, where we write or read more than 4GB on an edge connection
28781 in a single second. Bugfix on 0.1.2.8-beta.
28782 - Correct the warning displayed when a rendezvous descriptor exceeds
28783 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
28785 - Clients and hidden services now use HSDir-flagged relays for hidden
28786 service descriptor downloads and uploads even if the relays have no
28787 DirPort set and the client has disabled TunnelDirConns. This will
28788 eventually allow us to give the HSDir flag to relays with no
28789 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
28790 - Downgrade "no current certificates known for authority" message from
28791 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
28792 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
28793 2917. Bugfix on 0.1.1.1-alpha.
28794 - Only limit the lengths of single HS descriptors, even when multiple
28795 HS descriptors are published to an HSDir relay in a single POST
28796 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
28797 - Write the current time into the LastWritten line in our state file,
28798 rather than the time from the previous write attempt. Also, stop
28799 trying to use a time of -1 in our log statements. Fixes bug 3039;
28800 bugfix on 0.2.2.14-alpha.
28801 - Be more consistent in our treatment of file system paths. "~" should
28802 get expanded to the user's home directory in the Log config option.
28803 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
28804 feature for the -f and --DataDirectory options.
28807 - Make sure every relay writes a state file at least every 12 hours.
28808 Previously, a relay could go for weeks without writing its state
28809 file, and on a crash could lose its bandwidth history, capacity
28810 estimates, client country statistics, and so on. Addresses bug 3012.
28811 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
28812 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
28813 clients are already deprecated because of security bugs.
28814 - Don't allow v0 hidden service authorities to act as clients.
28815 Required by fix for bug 3000.
28816 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
28817 by fix for bug 3000.
28818 - Ensure that no empty [dirreq-](read|write)-history lines are added
28819 to an extrainfo document. Implements ticket 2497.
28821 o Code simplification and refactoring:
28822 - Remove workaround code to handle directory responses from servers
28823 that had bug 539 (they would send HTTP status 503 responses _and_
28824 send a body too). Since only server versions before
28825 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
28826 keep the workaround in place.
28827 - Remove the old 'fuzzy time' logic. It was supposed to be used for
28828 handling calculations where we have a known amount of clock skew and
28829 an allowed amount of unknown skew. But we only used it in three
28830 places, and we never adjusted the known/unknown skew values. This is
28831 still something we might want to do someday, but if we do, we'll
28832 want to do it differently.
28833 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
28834 None of the cases where we did this before were wrong, but by making
28835 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
28836 - Use GetTempDir to find the proper temporary directory location on
28837 Windows when generating temporary files for the unit tests. Patch by
28841 Changes in version 0.2.2.24-alpha - 2011-04-08
28842 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
28843 prevented Tor clients from effectively using "multihomed" bridges,
28844 that is, bridges that listen on multiple ports or IP addresses so users
28845 can continue to use some of their addresses even if others get blocked.
28848 - Fix a bug where bridge users who configure the non-canonical
28849 address of a bridge automatically switch to its canonical
28850 address. If a bridge listens at more than one address, it should be
28851 able to advertise those addresses independently and any non-blocked
28852 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
28854 - If you configured Tor to use bridge A, and then quit and
28855 configured Tor to use bridge B instead, it would happily continue
28856 to use bridge A if it's still reachable. While this behavior is
28857 a feature if your goal is connectivity, in some scenarios it's a
28858 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
28859 - Directory authorities now use data collected from their own
28860 uptime observations when choosing whether to assign the HSDir flag
28861 to relays, instead of trusting the uptime value the relay reports in
28862 its descriptor. This change helps prevent an attack where a small
28863 set of nodes with frequently-changing identity keys can blackhole
28864 a hidden service. (Only authorities need upgrade; others will be
28865 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
28868 - When we restart our relay, we might get a successful connection
28869 from the outside before we've started our reachability tests,
28870 triggering a warning: "ORPort found reachable, but I have no
28871 routerinfo yet. Failing to inform controller of success." This
28872 bug was harmless unless Tor is running under a controller
28873 like Vidalia, in which case the controller would never get a
28874 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
28876 - Make directory authorities more accurate at recording when
28877 relays that have failed several reachability tests became
28878 unreachable, so we can provide more accuracy at assigning Stable,
28879 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
28880 - Fix an issue that prevented static linking of libevent on
28881 some platforms (notably Linux). Fixes bug 2698; bugfix on
28882 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
28883 the --with-static-libevent configure option).
28884 - We now ask the other side of a stream (the client or the exit)
28885 for more data on that stream when the amount of queued data on
28886 that stream dips low enough. Previously, we wouldn't ask the
28887 other side for more data until either it sent us more data (which
28888 it wasn't supposed to do if it had exhausted its window!) or we
28889 had completely flushed all our queued data. This flow control fix
28890 should improve throughput. Fixes bug 2756; bugfix on the earliest
28891 released versions of Tor (svn commit r152).
28892 - Avoid a double-mark-for-free warning when failing to attach a
28893 transparent proxy connection. (We thought we had fixed this in
28894 0.2.2.23-alpha, but it turns out our fix was checking the wrong
28895 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
28896 bug) and 0.2.2.23-alpha (the incorrect fix).
28897 - When warning about missing zlib development packages during compile,
28898 give the correct package names. Bugfix on 0.2.0.1-alpha.
28901 - Directory authorities now log the source of a rejected POSTed v3
28902 networkstatus vote.
28903 - Make compilation with clang possible when using
28904 --enable-gcc-warnings by removing two warning options that clang
28905 hasn't implemented yet and by fixing a few warnings. Implements
28907 - When expiring circuits, use microsecond timers rather than
28908 one-second timers. This can avoid an unpleasant situation where a
28909 circuit is launched near the end of one second and expired right
28910 near the beginning of the next, and prevent fluctuations in circuit
28912 - Use computed circuit-build timeouts to decide when to launch
28913 parallel introduction circuits for hidden services. (Previously,
28914 we would retry after 15 seconds.)
28915 - Update to the April 1 2011 Maxmind GeoLite Country database.
28918 - Create the /var/run/tor directory on startup on OpenSUSE if it is
28919 not already created. Patch from Andreas Stieger. Fixes bug 2573.
28921 o Documentation changes:
28922 - Modernize the doxygen configuration file slightly. Fixes bug 2707.
28923 - Resolve all doxygen warnings except those for missing documentation.
28925 - Add doxygen documentation for more functions, fields, and types.
28928 Changes in version 0.2.2.23-alpha - 2011-03-08
28929 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
28930 they restart they don't lose their bandwidth capacity estimate. This
28931 release also fixes a diverse set of user-facing bugs, ranging from
28932 relays overrunning their rate limiting to clients falsely warning about
28933 clock skew to bridge descriptor leaks by our bridge directory authority.
28936 - Stop sending a CLOCK_SKEW controller status event whenever
28937 we fetch directory information from a relay that has a wrong clock.
28938 Instead, only inform the controller when it's a trusted authority
28939 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
28940 the rest of bug 1074.
28941 - Fix an assert in parsing router descriptors containing IPv6
28942 addresses. This one took down the directory authorities when
28943 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
28944 - Make the bridge directory authority refuse to answer directory
28945 requests for "all" descriptors. It used to include bridge
28946 descriptors in its answer, which was a major information leak.
28947 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
28948 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
28949 Tor would ignore their RelayBandwidthBurst setting,
28950 potentially using more bandwidth than expected. Bugfix on
28951 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
28952 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
28953 hidserv" in her torrc. The 'hidserv' argument never controlled
28954 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
28957 - Relays now save observed peak bandwidth throughput rates to their
28958 state file (along with total usage, which was already saved)
28959 so that they can determine their correct estimated bandwidth on
28960 restart. Resolves bug 1863, where Tor relays would reset their
28961 estimated bandwidth to 0 after restarting.
28962 - Directory authorities now take changes in router IP address and
28963 ORPort into account when determining router stability. Previously,
28964 if a router changed its IP or ORPort, the authorities would not
28965 treat it as having any downtime for the purposes of stability
28966 calculation, whereas clients would experience downtime since the
28967 change could take a while to propagate to them. Resolves issue 1035.
28968 - Enable Address Space Layout Randomization (ASLR) and Data Execution
28969 Prevention (DEP) by default on Windows to make it harder for
28970 attackers to exploit vulnerabilities. Patch from John Brooks.
28972 o Minor bugfixes (on 0.2.1.x and earlier):
28973 - Fix a rare crash bug that could occur when a client was configured
28974 with a large number of bridges. Fixes bug 2629; bugfix on
28975 0.2.1.2-alpha. Bugfix by trac user "shitlei".
28976 - Avoid a double mark-for-free warning when failing to attach a
28977 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
28979 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
28980 found by "cypherpunks". This bug was introduced before the first
28981 Tor release, in svn commit r110.
28982 - Country codes aren't supported in EntryNodes until 0.2.3.x, so
28983 don't mention them in the manpage. Fixes bug 2450; issue
28984 spotted by keb and G-Lo.
28985 - Fix a bug in bandwidth history state parsing that could have been
28986 triggered if a future version of Tor ever changed the timing
28987 granularity at which bandwidth history is measured. Bugfix on
28988 Tor 0.1.1.11-alpha.
28989 - When a relay decides that its DNS is too broken for it to serve
28990 as an exit server, it advertised itself as a non-exit, but
28991 continued to act as an exit. This could create accidental
28992 partitioning opportunities for users. Instead, if a relay is
28993 going to advertise reject *:* as its exit policy, it should
28994 really act with exit policy "reject *:*". Fixes bug 2366.
28995 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
28996 - In the special case where you configure a public exit relay as your
28997 bridge, Tor would be willing to use that exit relay as the last
28998 hop in your circuit as well. Now we fail that circuit instead.
28999 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
29000 - Fix a bug with our locking implementation on Windows that couldn't
29001 correctly detect when a file was already locked. Fixes bug 2504,
29002 bugfix on 0.2.1.6-alpha.
29003 - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
29004 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
29006 - Set target port in get_interface_address6() correctly. Bugfix
29007 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
29008 - Directory authorities are now more robust to hops back in time
29009 when calculating router stability. Previously, if a run of uptime
29010 or downtime appeared to be negative, the calculation could give
29011 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
29013 - Fix an assert that got triggered when using the TestingTorNetwork
29014 configuration option and then issuing a GETINFO config-text control
29015 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
29017 o Minor bugfixes (on 0.2.2.x):
29018 - Clients should not weight BadExit nodes as Exits in their node
29019 selection. Similarly, directory authorities should not count BadExit
29020 bandwidth as Exit bandwidth when computing bandwidth-weights.
29021 Bugfix on 0.2.2.10-alpha; fixes bug 2203.
29022 - Correctly clear our dir_read/dir_write history when there is an
29023 error parsing any bw history value from the state file. Bugfix on
29024 Tor 0.2.2.15-alpha.
29025 - Resolve a bug in verifying signatures of directory objects
29026 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
29027 Fixes bug 2409. Found by "piebeer".
29028 - Bridge authorities no longer crash on SIGHUP when they try to
29029 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
29033 - Log less aggressively about circuit timeout changes, and improve
29034 some other circuit timeout messages. Resolves bug 2004.
29035 - Log a little more clearly about the times at which we're no longer
29036 accepting new connections. Resolves bug 2181.
29037 - Reject attempts at the client side to open connections to private
29038 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
29039 a randomly chosen exit node. Attempts to do so are always
29040 ill-defined, generally prevented by exit policies, and usually
29041 in error. This will also help to detect loops in transparent
29042 proxy configurations. You can disable this feature by setting
29043 "ClientRejectInternalAddresses 0" in your torrc.
29044 - Always treat failure to allocate an RSA key as an unrecoverable
29046 - Update to the March 1 2011 Maxmind GeoLite Country database.
29048 o Minor features (log subsystem):
29049 - Add documentation for configuring logging at different severities in
29050 different log domains. We've had this feature since 0.2.1.1-alpha,
29051 but for some reason it never made it into the manpage. Fixes
29053 - Make it simpler to specify "All log domains except for A and B".
29054 Previously you needed to say "[*,~A,~B]". Now you can just say
29056 - Add a "LogMessageDomains 1" option to include the domains of log
29057 messages along with the messages. Without this, there's no way
29058 to use log domains without reading the source or doing a lot
29061 o Packaging changes:
29062 - Stop shipping the Tor specs files and development proposal documents
29063 in the tarball. They are now in a separate git repository at
29064 git://git.torproject.org/torspec.git
29067 Changes in version 0.2.1.30 - 2011-02-23
29068 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
29069 change is a slight tweak to Tor's TLS handshake that makes relays
29070 and bridges that run this new version reachable from Iran again.
29071 We don't expect this tweak will win the arms race long-term, but it
29072 buys us time until we roll out a better solution.
29075 - Stop sending a CLOCK_SKEW controller status event whenever
29076 we fetch directory information from a relay that has a wrong clock.
29077 Instead, only inform the controller when it's a trusted authority
29078 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
29079 the rest of bug 1074.
29080 - Fix a bounds-checking error that could allow an attacker to
29081 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
29082 Found by "piebeer".
29083 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
29084 Tor would ignore their RelayBandwidthBurst setting,
29085 potentially using more bandwidth than expected. Bugfix on
29086 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
29087 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
29088 hidserv" in her torrc. The 'hidserv' argument never controlled
29089 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
29092 - Adjust our TLS Diffie-Hellman parameters to match those used by
29094 - Update to the February 1 2011 Maxmind GeoLite Country database.
29097 - Check for and reject overly long directory certificates and
29098 directory tokens before they have a chance to hit any assertions.
29099 Bugfix on 0.2.1.28. Found by "doorss".
29100 - Bring the logic that gathers routerinfos and assesses the
29101 acceptability of circuits into line. This prevents a Tor OP from
29102 getting locked in a cycle of choosing its local OR as an exit for a
29103 path (due to a .exit request) and then rejecting the circuit because
29104 its OR is not listed yet. It also prevents Tor clients from using an
29105 OR running in the same instance as an exit (due to a .exit request)
29106 if the OR does not meet the same requirements expected of an OR
29107 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
29109 o Packaging changes:
29110 - Stop shipping the Tor specs files and development proposal documents
29111 in the tarball. They are now in a separate git repository at
29112 git://git.torproject.org/torspec.git
29113 - Do not include Git version tags as though they are SVN tags when
29114 generating a tarball from inside a repository that has switched
29115 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
29118 Changes in version 0.2.2.22-alpha - 2011-01-25
29119 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
29120 main other change is a slight tweak to Tor's TLS handshake that makes
29121 relays and bridges that run this new version reachable from Iran again.
29122 We don't expect this tweak will win the arms race long-term, but it
29123 will buy us a bit more time until we roll out a better solution.
29126 - Fix a bounds-checking error that could allow an attacker to
29127 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
29128 Found by "piebeer".
29129 - Don't assert when changing from bridge to relay or vice versa
29130 via the controller. The assert happened because we didn't properly
29131 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
29132 bug 2433. Reported by bastik.
29135 - Adjust our TLS Diffie-Hellman parameters to match those used by
29137 - Provide a log message stating which geoip file we're parsing
29138 instead of just stating that we're parsing the geoip file.
29139 Implements ticket 2432.
29142 - Check for and reject overly long directory certificates and
29143 directory tokens before they have a chance to hit any assertions.
29144 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
29147 Changes in version 0.2.2.21-alpha - 2011-01-15
29148 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
29149 continues our recent code security audit work. The main fix resolves
29150 a remote heap overflow vulnerability that can allow remote code
29151 execution (CVE-2011-0427). Other fixes address a variety of assert
29152 and crash bugs, most of which we think are hard to exploit remotely.
29154 o Major bugfixes (security), also included in 0.2.1.29:
29155 - Fix a heap overflow bug where an adversary could cause heap
29156 corruption. This bug probably allows remote code execution
29157 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
29159 - Prevent a denial-of-service attack by disallowing any
29160 zlib-compressed data whose compression factor is implausibly
29161 high. Fixes part of bug 2324; reported by "doorss".
29162 - Zero out a few more keys in memory before freeing them. Fixes
29163 bug 2384 and part of bug 2385. These key instances found by
29164 "cypherpunks", based on Andrew Case's report about being able
29165 to find sensitive data in Tor's memory space if you have enough
29166 permissions. Bugfix on 0.0.2pre9.
29168 o Major bugfixes (crashes), also included in 0.2.1.29:
29169 - Prevent calls to Libevent from inside Libevent log handlers.
29170 This had potential to cause a nasty set of crashes, especially
29171 if running Libevent with debug logging enabled, and running
29172 Tor with a controller watching for low-severity log messages.
29173 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
29174 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
29175 underflow errors there too. Fixes the other part of bug 2324.
29176 - Fix a bug where we would assert if we ever had a
29177 cached-descriptors.new file (or another file read directly into
29178 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
29179 on 0.2.1.25. Found by doorss.
29180 - Fix some potential asserts and parsing issues with grossly
29181 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
29184 o Minor bugfixes (other), also included in 0.2.1.29:
29185 - Fix a bug with handling misformed replies to reverse DNS lookup
29186 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
29187 bug reported by doorss.
29188 - Fix compilation on mingw when a pthreads compatibility library
29189 has been installed. (We don't want to use it, so we shouldn't
29190 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
29191 - Fix a bug where we would declare that we had run out of virtual
29192 addresses when the address space was only half-exhausted. Bugfix
29194 - Correctly handle the case where AutomapHostsOnResolve is set but
29195 no virtual addresses are available. Fixes bug 2328; bugfix on
29196 0.1.2.1-alpha. Bug found by doorss.
29197 - Correctly handle wrapping around when we run out of virtual
29198 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
29200 o Minor features, also included in 0.2.1.29:
29201 - Update to the January 1 2011 Maxmind GeoLite Country database.
29202 - Introduce output size checks on all of our decryption functions.
29204 o Build changes, also included in 0.2.1.29:
29205 - Tor does not build packages correctly with Automake 1.6 and earlier;
29206 added a check to Makefile.am to make sure that we're building with
29207 Automake 1.7 or later.
29208 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
29209 because we built it with a too-old version of automake. Thus that
29210 release broke ./configure --enable-openbsd-malloc, which is popular
29211 among really fast exit relays on Linux.
29213 o Major bugfixes, new in 0.2.2.21-alpha:
29214 - Prevent crash/heap corruption when the cbtnummodes consensus
29215 parameter is set to 0 or large values. Fixes bug 2317; bugfix
29218 o Major features, new in 0.2.2.21-alpha:
29219 - Introduce minimum/maximum values that clients will believe
29220 from the consensus. Now we'll have a better chance to avoid crashes
29221 or worse when a consensus param has a weird value.
29223 o Minor features, new in 0.2.2.21-alpha:
29224 - Make sure to disable DirPort if running as a bridge. DirPorts aren't
29225 used on bridges, and it makes bridge scanning somewhat easier.
29226 - If writing the state file to disk fails, wait up to an hour before
29227 retrying again, rather than trying again each second. Fixes bug
29228 2346; bugfix on Tor 0.1.1.3-alpha.
29229 - Make Libevent log messages get delivered to controllers later,
29230 and not from inside the Libevent log handler. This prevents unsafe
29231 reentrant Libevent calls while still letting the log messages
29233 - Detect platforms that brokenly use a signed size_t, and refuse to
29234 build there. Found and analyzed by doorss and rransom.
29235 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
29238 o Minor bugfixes, new in 0.2.2.21-alpha:
29239 - Handle SOCKS messages longer than 128 bytes long correctly, rather
29240 than waiting forever for them to finish. Fixes bug 2330; bugfix
29241 on 0.2.0.16-alpha. Found by doorss.
29242 - Add assertions to check for overflow in arguments to
29243 base32_encode() and base32_decode(); fix a signed-unsigned
29244 comparison there too. These bugs are not actually reachable in Tor,
29245 but it's good to prevent future errors too. Found by doorss.
29246 - Correctly detect failures to create DNS requests when using Libevent
29247 versions before v2. (Before Libevent 2, we used our own evdns
29248 implementation. Its return values for Libevent's evdns_resolve_*()
29249 functions are not consistent with those from Libevent.) Fixes bug
29250 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
29252 o Documentation, new in 0.2.2.21-alpha:
29253 - Document the default socks host and port (127.0.0.1:9050) for
29257 Changes in version 0.2.1.29 - 2011-01-15
29258 Tor 0.2.1.29 continues our recent code security audit work. The main
29259 fix resolves a remote heap overflow vulnerability that can allow remote
29260 code execution. Other fixes address a variety of assert and crash bugs,
29261 most of which we think are hard to exploit remotely.
29263 o Major bugfixes (security):
29264 - Fix a heap overflow bug where an adversary could cause heap
29265 corruption. This bug probably allows remote code execution
29266 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
29268 - Prevent a denial-of-service attack by disallowing any
29269 zlib-compressed data whose compression factor is implausibly
29270 high. Fixes part of bug 2324; reported by "doorss".
29271 - Zero out a few more keys in memory before freeing them. Fixes
29272 bug 2384 and part of bug 2385. These key instances found by
29273 "cypherpunks", based on Andrew Case's report about being able
29274 to find sensitive data in Tor's memory space if you have enough
29275 permissions. Bugfix on 0.0.2pre9.
29277 o Major bugfixes (crashes):
29278 - Prevent calls to Libevent from inside Libevent log handlers.
29279 This had potential to cause a nasty set of crashes, especially
29280 if running Libevent with debug logging enabled, and running
29281 Tor with a controller watching for low-severity log messages.
29282 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
29283 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
29284 underflow errors there too. Fixes the other part of bug 2324.
29285 - Fix a bug where we would assert if we ever had a
29286 cached-descriptors.new file (or another file read directly into
29287 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
29288 on 0.2.1.25. Found by doorss.
29289 - Fix some potential asserts and parsing issues with grossly
29290 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
29293 o Minor bugfixes (other):
29294 - Fix a bug with handling misformed replies to reverse DNS lookup
29295 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
29296 bug reported by doorss.
29297 - Fix compilation on mingw when a pthreads compatibility library
29298 has been installed. (We don't want to use it, so we shouldn't
29299 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
29300 - Fix a bug where we would declare that we had run out of virtual
29301 addresses when the address space was only half-exhausted. Bugfix
29303 - Correctly handle the case where AutomapHostsOnResolve is set but
29304 no virtual addresses are available. Fixes bug 2328; bugfix on
29305 0.1.2.1-alpha. Bug found by doorss.
29306 - Correctly handle wrapping around to when we run out of virtual
29307 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
29308 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
29309 because we built it with a too-old version of automake. Thus that
29310 release broke ./configure --enable-openbsd-malloc, which is popular
29311 among really fast exit relays on Linux.
29314 - Update to the January 1 2011 Maxmind GeoLite Country database.
29315 - Introduce output size checks on all of our decryption functions.
29318 - Tor does not build packages correctly with Automake 1.6 and earlier;
29319 added a check to Makefile.am to make sure that we're building with
29320 Automake 1.7 or later.
29323 Changes in version 0.2.2.20-alpha - 2010-12-17
29324 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
29325 exploitable bugs. We also fix a variety of other significant bugs,
29326 change the IP address for one of our directory authorities, and update
29327 the minimum version that Tor relays must run to join the network.
29330 - Fix a remotely exploitable bug that could be used to crash instances
29331 of Tor remotely by overflowing on the heap. Remote-code execution
29332 hasn't been confirmed, but can't be ruled out. Everyone should
29333 upgrade. Bugfix on the 0.1.1 series and later.
29334 - Fix a bug that could break accounting on 64-bit systems with large
29335 time_t values, making them hibernate for impossibly long intervals.
29336 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
29337 - Fix a logic error in directory_fetches_from_authorities() that
29338 would cause all _non_-exits refusing single-hop-like circuits
29339 to fetch from authorities, when we wanted to have _exits_ fetch
29340 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
29342 - Fix a stream fairness bug that would cause newer streams on a given
29343 circuit to get preference when reading bytes from the origin or
29344 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
29345 introduced before the first Tor release, in svn revision r152.
29347 o Directory authority changes:
29348 - Change IP address and ports for gabelmoo (v3 directory authority).
29351 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
29352 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
29353 - Fix an off-by-one error in calculating some controller command
29354 argument lengths. Fortunately, this mistake is harmless since
29355 the controller code does redundant NUL termination too. Found by
29356 boboper. Bugfix on 0.1.1.1-alpha.
29357 - Do not dereference NULL if a bridge fails to build its
29358 extra-info descriptor. Found by an anonymous commenter on
29359 Trac. Bugfix on 0.2.2.19-alpha.
29362 - Update to the December 1 2010 Maxmind GeoLite Country database.
29363 - Directory authorities now reject relays running any versions of
29364 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
29365 known bugs that keep RELAY_EARLY cells from working on rendezvous
29366 circuits. Followup to fix for bug 2081.
29367 - Directory authorities now reject relays running any version of Tor
29368 older than 0.2.0.26-rc. That version is the earliest that fetches
29369 current directory information correctly. Fixes bug 2156.
29370 - Report only the top 10 ports in exit-port stats in order not to
29371 exceed the maximum extra-info descriptor length of 50 KB. Implements
29375 Changes in version 0.2.1.28 - 2010-12-17
29376 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
29377 exploitable bugs. We also took this opportunity to change the IP address
29378 for one of our directory authorities, and to update the geoip database
29382 - Fix a remotely exploitable bug that could be used to crash instances
29383 of Tor remotely by overflowing on the heap. Remote-code execution
29384 hasn't been confirmed, but can't be ruled out. Everyone should
29385 upgrade. Bugfix on the 0.1.1 series and later.
29387 o Directory authority changes:
29388 - Change IP address and ports for gabelmoo (v3 directory authority).
29391 - Update to the December 1 2010 Maxmind GeoLite Country database.
29394 Changes in version 0.2.1.27 - 2010-11-23
29395 Yet another OpenSSL security patch broke its compatibility with Tor:
29396 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
29397 also took this opportunity to fix several crash bugs, integrate a new
29398 directory authority, and update the bundled GeoIP database.
29401 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
29402 No longer set the tlsext_host_name extension on server SSL objects;
29403 but continue to set it on client SSL objects. Our goal in setting
29404 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
29405 bugfix on 0.2.1.1-alpha.
29406 - Do not log messages to the controller while shrinking buffer
29407 freelists. Doing so would sometimes make the controller connection
29408 try to allocate a buffer chunk, which would mess up the internals
29409 of the freelist and cause an assertion failure. Fixes bug 1125;
29410 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
29411 - Learn our external IP address when we're a relay or bridge, even if
29412 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
29413 where we introduced bridge relays that don't need to publish to
29414 be useful. Fixes bug 2050.
29415 - Do even more to reject (and not just ignore) annotations on
29416 router descriptors received anywhere but from the cache. Previously
29417 we would ignore such annotations at first, but cache them to disk
29418 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
29419 - When you're using bridges and your network goes away and your
29420 bridges get marked as down, recover when you attempt a new socks
29421 connection (if the network is back), rather than waiting up to an
29422 hour to try fetching new descriptors for your bridges. Bugfix on
29423 0.2.0.3-alpha; fixes bug 1981.
29426 - Move to the November 2010 Maxmind GeoLite country db (rather
29427 than the June 2009 ip-to-country GeoIP db) for our statistics that
29428 count how many users relays are seeing from each country. Now we'll
29429 have more accurate data, especially for many African countries.
29431 o New directory authorities:
29432 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
29436 - Fix an assertion failure that could occur in directory caches or
29437 bridge users when using a very short voting interval on a testing
29438 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
29440 - Enforce multiplicity rules when parsing annotations. Bugfix on
29441 0.2.0.8-alpha. Found by piebeer.
29442 - Allow handshaking OR connections to take a full KeepalivePeriod
29443 seconds to handshake. Previously, we would close them after
29444 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
29445 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
29447 - When building with --enable-gcc-warnings on OpenBSD, disable
29448 warnings in system headers. This makes --enable-gcc-warnings
29449 pass on OpenBSD 4.8.
29452 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
29453 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
29454 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
29455 Servers can start sending this code when enough clients recognize
29456 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
29457 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
29458 Patch from mingw-san.
29461 - Remove the old debian/ directory from the main Tor distribution.
29462 The official Tor-for-debian git repository lives at the URL
29463 https://git.torproject.org/debian/tor.git
29464 - Stop shipping the old doc/website/ directory in the tarball. We
29465 changed the website format in late 2010, and what we shipped in
29466 0.2.1.26 really wasn't that useful anyway.
29469 Changes in version 0.2.2.19-alpha - 2010-11-22
29470 Yet another OpenSSL security patch broke its compatibility with Tor:
29471 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
29474 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
29475 No longer set the tlsext_host_name extension on server SSL objects;
29476 but continue to set it on client SSL objects. Our goal in setting
29477 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
29478 bugfix on 0.2.1.1-alpha.
29481 - Try harder not to exceed the maximum length of 50 KB when writing
29482 statistics to extra-info descriptors. This bug was triggered by very
29483 fast relays reporting exit-port, entry, and dirreq statistics.
29484 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
29485 - Publish a router descriptor even if generating an extra-info
29486 descriptor fails. Previously we would not publish a router
29487 descriptor without an extra-info descriptor; this can cause fast
29488 exit relays collecting exit-port statistics to drop from the
29489 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
29492 Changes in version 0.2.2.18-alpha - 2010-11-16
29493 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
29494 us lately, makes unpublished bridge relays able to detect their IP
29495 address, and fixes a wide variety of other bugs to get us much closer
29496 to a stable release.
29499 - Do even more to reject (and not just ignore) annotations on
29500 router descriptors received anywhere but from the cache. Previously
29501 we would ignore such annotations at first, but cache them to disk
29502 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
29503 - Do not log messages to the controller while shrinking buffer
29504 freelists. Doing so would sometimes make the controller connection
29505 try to allocate a buffer chunk, which would mess up the internals
29506 of the freelist and cause an assertion failure. Fixes bug 1125;
29507 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
29508 - Learn our external IP address when we're a relay or bridge, even if
29509 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
29510 where we introduced bridge relays that don't need to publish to
29511 be useful. Fixes bug 2050.
29512 - Maintain separate TLS contexts and certificates for incoming and
29513 outgoing connections in bridge relays. Previously we would use the
29514 same TLS contexts and certs for incoming and outgoing connections.
29515 Bugfix on 0.2.0.3-alpha; addresses bug 988.
29516 - Maintain separate identity keys for incoming and outgoing TLS
29517 contexts in bridge relays. Previously we would use the same
29518 identity keys for incoming and outgoing TLS contexts. Bugfix on
29519 0.2.0.3-alpha; addresses the other half of bug 988.
29520 - Avoid an assertion failure when we as an authority receive a
29521 duplicate upload of a router descriptor that we already have,
29522 but which we previously considered an obsolete descriptor.
29523 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
29524 - Avoid a crash bug triggered by looking at a dangling pointer while
29525 setting the network status consensus. Found by Robert Ransom.
29526 Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
29527 - Fix a logic error where servers that _didn't_ act as exits would
29528 try to keep their server lists more aggressively up to date than
29529 exits, when it was supposed to be the other way around. Bugfix
29532 o Minor bugfixes (on Tor 0.2.1.x and earlier):
29533 - When we're trying to guess whether we know our IP address as
29534 a relay, we would log various ways that we failed to guess
29535 our address, but never log that we ended up guessing it
29536 successfully. Now add a log line to help confused and anxious
29537 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
29538 - Bring the logic that gathers routerinfos and assesses the
29539 acceptability of circuits into line. This prevents a Tor OP from
29540 getting locked in a cycle of choosing its local OR as an exit for a
29541 path (due to a .exit request) and then rejecting the circuit because
29542 its OR is not listed yet. It also prevents Tor clients from using an
29543 OR running in the same instance as an exit (due to a .exit request)
29544 if the OR does not meet the same requirements expected of an OR
29545 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
29546 - Correctly describe errors that occur when generating a TLS object.
29547 Previously we would attribute them to a failure while generating a
29548 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
29550 - Enforce multiplicity rules when parsing annotations. Bugfix on
29551 0.2.0.8-alpha. Found by piebeer.
29552 - Fix warnings that newer versions of autoconf produced during
29553 ./autogen.sh. These warnings appear to be harmless in our case,
29554 but they were extremely verbose. Fixes bug 2020.
29556 o Minor bugfixes (on Tor 0.2.2.x):
29557 - Enable protection of small arrays whenever we build with gcc
29558 hardening features, not only when also building with warnings
29559 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
29562 - Make hidden services work better in private Tor networks by not
29563 requiring any uptime to join the hidden service descriptor
29564 DHT. Implements ticket 2088.
29565 - Rate-limit the "your application is giving Tor only an IP address"
29566 warning. Addresses bug 2000; bugfix on 0.0.8pre2.
29567 - When AllowSingleHopExits is set, print a warning to explain to the
29568 relay operator why most clients are avoiding her relay.
29569 - Update to the November 1 2010 Maxmind GeoLite Country database.
29571 o Code simplifications and refactoring:
29572 - When we fixed bug 1038 we had to put in a restriction not to send
29573 RELAY_EARLY cells on rend circuits. This was necessary as long
29574 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
29575 active. Now remove this obsolete check. Resolves bug 2081.
29576 - Some options used different conventions for uppercasing of acronyms
29577 when comparing manpage and source. Fix those in favor of the
29578 manpage, as it makes sense to capitalize acronyms.
29579 - Remove the torrc.complete file. It hasn't been kept up to date
29580 and users will have better luck checking out the manpage.
29581 - Remove the obsolete "NoPublish" option; it has been flagged
29582 as obsolete and has produced a warning since 0.1.1.18-rc.
29583 - Remove everything related to building the expert bundle for OS X.
29584 It has confused many users, doesn't work right on OS X 10.6,
29585 and is hard to get rid of once installed. Resolves bug 1274.
29588 Changes in version 0.2.2.17-alpha - 2010-09-30
29589 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
29590 to use one-hop circuits (which can put the exit relays at higher risk,
29591 plus unbalance the network); fixes a big bug in bandwidth accounting
29592 for relays that want to limit their monthly bandwidth use; fixes a
29593 big pile of bugs in how clients tolerate temporary network failure;
29594 and makes our adaptive circuit build timeout feature (which improves
29595 client performance if your network is fast while not breaking things
29596 if your network is slow) better handle bad networks.
29599 - Exit relays now try harder to block exit attempts from unknown
29600 relays, to make it harder for people to use them as one-hop proxies
29601 a la tortunnel. Controlled by the refuseunknownexits consensus
29602 parameter (currently enabled), or you can override it on your
29603 relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
29605 o Major bugfixes (0.2.1.x and earlier):
29606 - Fix a bug in bandwidth accounting that could make us use twice
29607 the intended bandwidth when our interval start changes due to
29608 daylight saving time. Now we tolerate skew in stored vs computed
29609 interval starts: if the start of the period changes by no more than
29610 50% of the period's duration, we remember bytes that we transferred
29611 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
29612 - Always search the Windows system directory for system DLLs, and
29613 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
29614 - When you're using bridges and your network goes away and your
29615 bridges get marked as down, recover when you attempt a new socks
29616 connection (if the network is back), rather than waiting up to an
29617 hour to try fetching new descriptors for your bridges. Bugfix on
29618 0.2.0.3-alpha; fixes bug 1981.
29620 o Major bugfixes (on 0.2.2.x):
29621 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
29623 - Fix a segfault that could happen when operating a bridge relay with
29624 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
29625 - The consensus bandwidth-weights (used by clients to choose fast
29626 relays) entered an unexpected edge case in September where
29627 Exits were much scarcer than Guards, resulting in bad weight
29628 recommendations. Now we compute them using new constraints that
29629 should succeed in all cases. Also alter directory authorities to
29630 not include the bandwidth-weights line if they fail to produce
29631 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
29632 - When weighting bridges during path selection, we used to trust
29633 the bandwidths they provided in their descriptor, only capping them
29634 at 10MB/s. This turned out to be problematic for two reasons:
29635 Bridges could claim to handle a lot more traffic then they
29636 actually would, thus making more clients pick them and have a
29637 pretty effective DoS attack. The other issue is that new bridges
29638 that might not have a good estimate for their bw capacity yet
29639 would not get used at all unless no other bridges are available
29640 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
29642 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
29643 - Ignore cannibalized circuits when recording circuit build times.
29644 This should provide for a minor performance improvement for hidden
29645 service users using 0.2.2.14-alpha, and should remove two spurious
29646 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
29647 - Simplify the logic that causes us to decide if the network is
29648 unavailable for purposes of recording circuit build times. If we
29649 receive no cells whatsoever for the entire duration of a circuit's
29650 full measured lifetime, the network is probably down. Also ignore
29651 one-hop directory fetching circuit timeouts when calculating our
29652 circuit build times. These changes should hopefully reduce the
29653 cases where we see ridiculous circuit build timeouts for people
29654 with spotty wireless connections. Fixes part of bug 1772; bugfix
29656 - Prevent the circuit build timeout from becoming larger than
29657 the maximum build time we have ever seen. Also, prevent the time
29658 period for measurement circuits from becoming larger than twice that
29659 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
29662 - When we run out of directory information such that we can't build
29663 circuits, but then get enough that we can build circuits, log when
29664 we actually construct a circuit, so the user has a better chance of
29665 knowing what's going on. Fixes bug 1362.
29666 - Be more generous with how much bandwidth we'd use up (with
29667 accounting enabled) before entering "soft hibernation". Previously,
29668 we'd refuse new connections and circuits once we'd used up 95% of
29669 our allotment. Now, we use up 95% of our allotment, AND make sure
29670 that we have no more than 500MB (or 3 hours of expected traffic,
29671 whichever is lower) remaining before we enter soft hibernation.
29672 - If we've configured EntryNodes and our network goes away and/or all
29673 our entrynodes get marked down, optimistically retry them all when
29674 a new socks application request appears. Fixes bug 1882.
29675 - Add some more defensive programming for architectures that can't
29676 handle unaligned integer accesses. We don't know of any actual bugs
29677 right now, but that's the best time to fix them. Fixes bug 1943.
29678 - Support line continuations in the torrc config file. If a line
29679 ends with a single backslash character, the newline is ignored, and
29680 the configuration value is treated as continuing on the next line.
29683 o Minor bugfixes (on 0.2.1.x and earlier):
29684 - For bandwidth accounting, calculate our expected bandwidth rate
29685 based on the time during which we were active and not in
29686 soft-hibernation during the last interval. Previously, we were
29687 also considering the time spent in soft-hibernation. If this
29688 was a long time, we would wind up underestimating our bandwidth
29689 by a lot, and skewing our wakeup time towards the start of the
29690 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
29692 o Minor bugfixes (on 0.2.2.x):
29693 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
29694 which were disabled by the circuit build timeout changes in
29695 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
29696 - Make sure we don't warn about missing bandwidth weights when
29697 choosing bridges or other relays not in the consensus. Bugfix on
29698 0.2.2.10-alpha; fixes bug 1805.
29699 - In our logs, do not double-report signatures from unrecognized
29700 authorities both as "from unknown authority" and "not
29701 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
29704 Changes in version 0.2.2.16-alpha - 2010-09-17
29705 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
29706 evident at exit relays), and also continues to resolve all the little
29707 bugs that have been filling up trac lately.
29709 o Major bugfixes (stream-level fairness):
29710 - When receiving a circuit-level SENDME for a blocked circuit, try
29711 to package cells fairly from all the streams that had previously
29712 been blocked on that circuit. Previously, we had started with the
29713 oldest stream, and allowed each stream to potentially exhaust
29714 the circuit's package window. This gave older streams on any
29715 given circuit priority over newer ones. Fixes bug 1937. Detected
29716 originally by Camilo Viecco. This bug was introduced before the
29717 first Tor release, in svn commit r152: it is the new winner of
29718 the longest-lived bug prize.
29719 - When the exit relay got a circuit-level sendme cell, it started
29720 reading on the exit streams, even if had 500 cells queued in the
29721 circuit queue already, so the circuit queue just grew and grew in
29722 some cases. We fix this by not re-enabling reading on receipt of a
29723 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
29724 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
29726 - Newly created streams were allowed to read cells onto circuits,
29727 even if the circuit's cell queue was blocked and waiting to drain.
29728 This created potential unfairness, as older streams would be
29729 blocked, but newer streams would gladly fill the queue completely.
29730 We add code to detect this situation and prevent any stream from
29731 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
29735 - Update to the September 1 2010 Maxmind GeoLite Country database.
29736 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
29737 not. This would lead to a cookie that is still not group readable.
29738 Closes bug 1843. Suggested by katmagic.
29739 - When logging a rate-limited warning, we now mention how many messages
29740 got suppressed since the last warning.
29741 - Add new "perconnbwrate" and "perconnbwburst" consensus params to
29742 do individual connection-level rate limiting of clients. The torrc
29743 config options with the same names trump the consensus params, if
29744 both are present. Replaces the old "bwconnrate" and "bwconnburst"
29745 consensus params which were broken from 0.2.2.7-alpha through
29746 0.2.2.14-alpha. Closes bug 1947.
29747 - When a router changes IP address or port, authorities now launch
29748 a new reachability test for it. Implements ticket 1899.
29749 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
29750 2 no signature, 4 required" messages about consensus signatures
29751 easier to read, and make sure they get logged at the same severity
29752 as the messages explaining which keys are which. Fixes bug 1290.
29753 - Don't warn when we have a consensus that we can't verify because
29754 of missing certificates, unless those certificates are ones
29755 that we have been trying and failing to download. Fixes bug 1145.
29756 - If you configure your bridge with a known identity fingerprint,
29757 and the bridge authority is unreachable (as it is in at least
29758 one country now), fall back to directly requesting the descriptor
29759 from the bridge. Finishes the feature started in 0.2.0.10-alpha;
29761 - When building with --enable-gcc-warnings on OpenBSD, disable
29762 warnings in system headers. This makes --enable-gcc-warnings
29763 pass on OpenBSD 4.8.
29765 o Minor bugfixes (on 0.2.1.x and earlier):
29766 - Authorities will now attempt to download consensuses if their
29767 own efforts to make a live consensus have failed. This change
29768 means authorities that restart will fetch a valid consensus, and
29769 it means authorities that didn't agree with the current consensus
29770 will still fetch and serve it if it has enough signatures. Bugfix
29771 on 0.2.0.9-alpha; fixes bug 1300.
29772 - Ensure DNS requests launched by "RESOLVE" commands from the
29773 controller respect the __LeaveStreamsUnattached setconf options. The
29774 same goes for requests launched via DNSPort or transparent
29775 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
29776 - Allow handshaking OR connections to take a full KeepalivePeriod
29777 seconds to handshake. Previously, we would close them after
29778 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
29779 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
29781 - Rate-limit "Failed to hand off onionskin" warnings.
29782 - Never relay a cell for a circuit we have already destroyed.
29783 Between marking a circuit as closeable and finally closing it,
29784 it may have been possible for a few queued cells to get relayed,
29785 even though they would have been immediately dropped by the next
29786 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
29787 - Never queue a cell for a circuit that's already been marked
29789 - Never vote for a server as "Running" if we have a descriptor for
29790 it claiming to be hibernating, and that descriptor was published
29791 more recently than our last contact with the server. Bugfix on
29792 0.2.0.3-alpha; fixes bug 911.
29793 - Squash a compile warning on OpenBSD. Reported by Tas; fixes
29796 o Minor bugfixes (on 0.2.2.x):
29797 - Fix a regression introduced in 0.2.2.7-alpha that marked relays
29798 down if a directory fetch fails and you've configured either
29799 bridges or EntryNodes. The intent was to mark the relay as down
29800 _unless_ you're using bridges or EntryNodes, since if you are
29801 then you could quickly run out of entry points.
29802 - Fix the Windows directory-listing code. A bug introduced in
29803 0.2.2.14-alpha could make Windows directory servers forget to load
29804 some of their cached v2 networkstatus files.
29805 - Really allow clients to use relays as bridges. Fixes bug 1776;
29806 bugfix on 0.2.2.15-alpha.
29807 - Demote a warn to info that happens when the CellStatistics option
29808 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
29809 Reported by Moritz Bartl.
29810 - On Windows, build correctly either with or without Unicode support.
29811 This is necessary so that Tor can support fringe platforms like
29812 Windows 98 (which has no Unicode), or Windows CE (which has no
29813 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
29816 - Add a unit test for cross-platform directory-listing code.
29819 Changes in version 0.2.2.15-alpha - 2010-08-18
29820 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
29821 fixes a variety of other bugs that were preventing performance
29822 experiments from moving forward, fixes several bothersome memory leaks,
29823 and generally closes a lot of smaller bugs that have been filling up
29827 - Stop assigning the HSDir flag to relays that disable their
29828 DirPort (and thus will refuse to answer directory requests). This
29829 fix should dramatically improve the reachability of hidden services:
29830 hidden services and hidden service clients pick six HSDir relays
29831 to store and retrieve the hidden service descriptor, and currently
29832 about half of the HSDir relays will refuse to work. Bugfix on
29833 0.2.0.10-alpha; fixes part of bug 1693.
29834 - The PerConnBWRate and Burst config options, along with the
29835 bwconnrate and bwconnburst consensus params, initialized each conn's
29836 token bucket values only when the connection is established. Now we
29837 update them if the config options change, and update them every time
29838 we get a new consensus. Otherwise we can encounter an ugly edge
29839 case where we initialize an OR conn to client-level bandwidth,
29840 but then later the relay joins the consensus and we leave it
29841 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
29842 - Fix a regression that caused Tor to rebind its ports if it receives
29843 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
29846 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
29847 should give us approximately 40-50% more Guard-flagged nodes,
29848 improving the anonymity the Tor network can provide and also
29849 decreasing the dropoff in throughput that relays experience when
29850 they first get the Guard flag.
29851 - Allow enabling or disabling the *Statistics config options while
29855 - Update to the August 1 2010 Maxmind GeoLite Country database.
29856 - Have the controller interface give a more useful message than
29857 "Internal Error" in response to failed GETINFO requests.
29858 - Warn when the same option is provided more than once in a torrc
29859 file, on the command line, or in a single SETCONF statement, and
29860 the option is one that only accepts a single line. Closes bug 1384.
29861 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
29862 Patch from mingw-san.
29863 - Add support for the country code "{??}" in torrc options like
29864 ExcludeNodes, to indicate all routers of unknown country. Closes
29866 - Relays report the number of bytes spent on answering directory
29867 requests in extra-info descriptors similar to {read,write}-history.
29868 Implements enhancement 1790.
29870 o Minor bugfixes (on 0.2.1.x and earlier):
29871 - Complain if PublishServerDescriptor is given multiple arguments that
29872 include 0 or 1. This configuration will be rejected in the future.
29873 Bugfix on 0.2.0.1-alpha; closes bug 1107.
29874 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
29875 Bugfix on 0.2.0.13-alpha; closes bug 928.
29876 - Change "Application request when we're believed to be offline."
29877 notice to "Application request when we haven't used client
29878 functionality lately.", to clarify that it's not an error. Bugfix
29879 on 0.0.9.3; fixes bug 1222.
29880 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
29881 would return "551 Internal error" rather than "552 Unrecognized key
29882 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
29883 - Users can't configure a regular relay to be their bridge. It didn't
29884 work because when Tor fetched the bridge descriptor, it found
29885 that it already had it, and didn't realize that the purpose of the
29886 descriptor had changed. Now we replace routers with a purpose other
29887 than bridge with bridge descriptors when fetching them. Bugfix on
29888 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
29889 refetch the descriptor with router purpose 'general', disabling
29891 - Fix a rare bug in rend_fn unit tests: we would fail a test when
29892 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
29893 on 0.2.0.10-alpha; fixes bug 1808.
29894 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
29895 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
29896 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
29897 Servers can start sending this code when enough clients recognize
29898 it. Also update the spec to reflect this new reason. Bugfix on
29899 0.1.0.1-rc; fixes part of bug 1793.
29900 - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
29901 when we switch from being a public relay to a bridge. Otherwise
29902 there will still be clients that see the relay in their consensus,
29903 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
29905 - Instead of giving an assertion failure on an internal mismatch
29906 on estimated freelist size, just log a BUG warning and try later.
29907 Mitigates but does not fix bug 1125.
29908 - Fix an assertion failure that could occur in caches or bridge users
29909 when using a very short voting interval on a testing network.
29910 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
29912 o Minor bugfixes (on 0.2.2.x):
29913 - Alter directory authorities to always consider Exit-flagged nodes
29914 as potential Guard nodes in their votes. The actual decision to
29915 use Exits as Guards is done in the consensus bandwidth weights.
29916 Fixes bug 1294; bugfix on 0.2.2.10-alpha.
29917 - When the controller is reporting the purpose of circuits that
29918 didn't finish building before the circuit build timeout, it was
29919 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
29920 - Our libevent version parsing code couldn't handle versions like
29921 1.4.14b-stable and incorrectly warned the user about using an
29922 old and broken version of libevent. Treat 1.4.14b-stable like
29923 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
29925 - Don't use substitution references like $(VAR:MOD) when
29926 $(asciidoc_files) is empty -- make(1) on NetBSD transforms
29927 '$(:x)' to 'x' rather than the empty string. This bites us in
29928 doc/ when configured with --disable-asciidoc. Bugfix on
29929 0.2.2.9-alpha; fixes bug 1773.
29930 - Remove a spurious hidden service server-side log notice about
29931 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
29933 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
29935 - Correctly report written bytes on linked connections. Found while
29936 implementing 1790. Bugfix on 0.2.2.4-alpha.
29937 - Fix three memory leaks: one in circuit_build_times_parse_state(),
29938 one in dirvote_add_signatures_to_pending_consensus(), and one every
29939 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
29940 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
29942 o Code simplifications and refactoring:
29943 - Take a first step towards making or.h smaller by splitting out
29944 function definitions for all source files in src/or/. Leave
29945 structures and defines in or.h for now.
29946 - Remove a bunch of unused function declarations as well as a block of
29947 #if 0'd code from the unit tests. Closes bug 1824.
29948 - New unit tests for exit-port history statistics; refactored exit
29949 statistics code to be more easily tested.
29950 - Remove the old debian/ directory from the main Tor distribution.
29951 The official Tor-for-debian git repository lives at the URL
29952 https://git.torproject.org/debian/tor.git
29955 Changes in version 0.2.2.14-alpha - 2010-07-12
29956 Tor 0.2.2.14-alpha greatly improves client-side handling of
29957 circuit build timeouts, which are used to estimate speed and improve
29958 performance. We also move to a much better GeoIP database, port Tor to
29959 Windows CE, introduce new compile flags that improve code security,
29960 add an eighth v3 directory authority, and address a lot of more
29964 - Tor directory authorities no longer crash when started with a
29965 cached-microdesc-consensus file in their data directory. Bugfix
29966 on 0.2.2.6-alpha; fixes bug 1532.
29967 - Treat an unset $HOME like an empty $HOME rather than triggering an
29968 assert. Bugfix on 0.0.8pre1; fixes bug 1522.
29969 - Ignore negative and large circuit build timeout values that can
29970 happen during a suspend or hibernate. These values caused various
29971 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
29972 - Alter calculation of Pareto distribution parameter 'Xm' for
29973 Circuit Build Timeout learning to use the weighted average of the
29974 top N=3 modes (because we have three entry guards). Considering
29975 multiple modes should improve the timeout calculation in some cases,
29976 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
29978 - Alter calculation of Pareto distribution parameter 'Alpha' to use a
29979 right censored distribution model. This approach improves over the
29980 synthetic timeout generation approach that was producing insanely
29981 high timeout values. Now we calculate build timeouts using truncated
29982 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
29983 - Do not close circuits that are under construction when they reach
29984 the circuit build timeout. Instead, leave them building (but do not
29985 use them) for up until the time corresponding to the 95th percentile
29986 on the Pareto CDF or 60 seconds, whichever is greater. This is done
29987 to provide better data for the new Pareto model. This percentile
29988 can be controlled by the consensus.
29991 - Move to the June 2010 Maxmind GeoLite country db (rather than the
29992 June 2009 ip-to-country GeoIP db) for our statistics that count
29993 how many users relays are seeing from each country. Now we have
29994 more accurate data for many African countries.
29995 - Port Tor to build and run correctly on Windows CE systems, using
29996 the wcecompat library. Contributed by Valerio Lupi.
29997 - New "--enable-gcc-hardening" ./configure flag (off by default)
29998 to turn on gcc compile time hardening options. It ensures
29999 that signed ints have defined behavior (-fwrapv), enables
30000 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
30001 with canaries (-fstack-protector-all), turns on ASLR protection if
30002 supported by the kernel (-fPIE, -pie), and adds additional security
30003 related warnings. Verified to work on Mac OS X and Debian Lenny.
30004 - New "--enable-linker-hardening" ./configure flag (off by default)
30005 to turn on ELF specific hardening features (relro, now). This does
30006 not work with Mac OS X or any other non-ELF binary format.
30008 o New directory authorities:
30009 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
30013 - New config option "WarnUnsafeSocks 0" disables the warning that
30014 occurs whenever Tor receives a socks handshake using a version of
30015 the socks protocol that can only provide an IP address (rather
30016 than a hostname). Setups that do DNS locally over Tor are fine,
30017 and we shouldn't spam the logs in that case.
30018 - Convert the HACKING file to asciidoc, and add a few new sections
30019 to it, explaining how we use Git, how we make changelogs, and
30020 what should go in a patch.
30021 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
30022 event, to give information on the current rate of circuit timeouts
30023 over our stored history.
30024 - Add ability to disable circuit build time learning via consensus
30025 parameter and via a LearnCircuitBuildTimeout config option. Also
30026 automatically disable circuit build time calculation if we are
30027 either a AuthoritativeDirectory, or if we fail to write our state
30028 file. Fixes bug 1296.
30029 - More gracefully handle corrupt state files, removing asserts
30030 in favor of saving a backup and resetting state.
30031 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
30035 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
30037 - When a2x fails, mention that the user could disable manpages instead
30038 of trying to fix their asciidoc installation.
30039 - Where available, use Libevent 2.0's periodic timers so that our
30040 once-per-second cleanup code gets called even more closely to
30041 once per second than it would otherwise. Fixes bug 943.
30042 - If you run a bridge that listens on multiple IP addresses, and
30043 some user configures a bridge address that uses a different IP
30044 address than your bridge writes in its router descriptor, and the
30045 user doesn't specify an identity key, their Tor would discard the
30046 descriptor because "it isn't one of our configured bridges", and
30047 fail to bootstrap. Now believe the descriptor and bootstrap anyway.
30048 Bugfix on 0.2.0.3-alpha.
30049 - If OpenSSL fails to make a duplicate of a private or public key, log
30050 an error message and try to exit cleanly. May help with debugging
30051 if bug 1209 ever remanifests.
30052 - Save a couple bytes in memory allocation every time we escape
30053 certain characters in a string. Patch from Florian Zumbiehl.
30054 - Make it explicit that we don't cannibalize one-hop circuits. This
30055 happens in the wild, but doesn't turn out to be a problem because
30056 we fortunately don't use those circuits. Many thanks to outofwords
30057 for the initial analysis and to swissknife who confirmed that
30058 two-hop circuits are actually created.
30059 - Make directory mirrors report non-zero dirreq-v[23]-shares again.
30060 Fixes bug 1564; bugfix on 0.2.2.9-alpha.
30061 - Eliminate a case where a circuit build time warning was displayed
30062 after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
30065 Changes in version 0.2.1.26 - 2010-05-02
30066 Tor 0.2.1.26 addresses the recent connection and memory overload
30067 problems we've been seeing on relays, especially relays with their
30068 DirPort open. If your relay has been crashing, or you turned it off
30069 because it used too many resources, give this release a try.
30071 This release also fixes yet another instance of broken OpenSSL libraries
30072 that was causing some relays to drop out of the consensus.
30075 - Teach relays to defend themselves from connection overload. Relays
30076 now close idle circuits early if it looks like they were intended
30077 for directory fetches. Relays are also more aggressive about closing
30078 TLS connections that have no circuits on them. Such circuits are
30079 unlikely to be re-used, and tens of thousands of them were piling
30080 up at the fast relays, causing the relays to run out of sockets
30081 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
30082 their directory fetches over TLS).
30083 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
30084 that claim to be earlier than 0.9.8m, but which have in reality
30085 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
30086 behavior. Possible fix for some cases of bug 1346.
30087 - Directory mirrors were fetching relay descriptors only from v2
30088 directory authorities, rather than v3 authorities like they should.
30089 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
30090 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
30093 - Finally get rid of the deprecated and now harmful notion of "clique
30094 mode", where directory authorities maintain TLS connections to
30098 - In the util/threads test, no longer free the test_mutex before all
30099 worker threads have finished. Bugfix on 0.2.1.6-alpha.
30100 - The master thread could starve the worker threads quite badly on
30101 certain systems, causing them to run only partially in the allowed
30102 window. This resulted in test failures. Now the master thread sleeps
30103 occasionally for a few microseconds while the two worker-threads
30104 compete for the mutex. Bugfix on 0.2.0.1-alpha.
30107 Changes in version 0.2.2.13-alpha - 2010-04-24
30108 Tor 0.2.2.13-alpha addresses the recent connection and memory overload
30109 problems we've been seeing on relays, especially relays with their
30110 DirPort open. If your relay has been crashing, or you turned it off
30111 because it used too many resources, give this release a try.
30114 - Teach relays to defend themselves from connection overload. Relays
30115 now close idle circuits early if it looks like they were intended
30116 for directory fetches. Relays are also more aggressive about closing
30117 TLS connections that have no circuits on them. Such circuits are
30118 unlikely to be re-used, and tens of thousands of them were piling
30119 up at the fast relays, causing the relays to run out of sockets
30120 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
30121 their directory fetches over TLS).
30124 - Finally get rid of the deprecated and now harmful notion of "clique
30125 mode", where directory authorities maintain TLS connections to
30127 - Directory authorities now do an immediate reachability check as soon
30128 as they hear about a new relay. This change should slightly reduce
30129 the time between setting up a relay and getting listed as running
30130 in the consensus. It should also improve the time between setting
30131 up a bridge and seeing use by bridge users.
30132 - Directory authorities no longer launch a TLS connection to every
30133 relay as they startup. Now that we have 2k+ descriptors cached,
30134 the resulting network hiccup is becoming a burden. Besides,
30135 authorities already avoid voting about Running for the first half
30136 hour of their uptime.
30139 Changes in version 0.2.2.12-alpha - 2010-04-20
30140 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
30141 handle and vote on descriptors. It was causing relays to drop out of
30145 - Many relays have been falling out of the consensus lately because
30146 not enough authorities know about their descriptor for them to get
30147 a majority of votes. When we deprecated the v2 directory protocol,
30148 we got rid of the only way that v3 authorities can hear from each
30149 other about other descriptors. Now authorities examine every v3
30150 vote for new descriptors, and fetch them from that authority. Bugfix
30152 - Fix two typos in tor_vasprintf() that broke the compile on Windows,
30153 and a warning in or.h related to bandwidth_weight_rule_t that
30154 prevented clean compile on OS X. Fixes bug 1363; bugfix on
30156 - Fix a segfault on relays when DirReqStatistics is enabled
30157 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
30161 - Demote a confusing TLS warning that relay operators might get when
30162 someone tries to talk to their OrPort. It is neither the operator's
30163 fault nor can they do anything about it. Fixes bug 1364; bugfix
30167 Changes in version 0.2.2.11-alpha - 2010-04-15
30168 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
30169 libraries that was causing some relays to drop out of the consensus.
30172 - Directory mirrors were fetching relay descriptors only from v2
30173 directory authorities, rather than v3 authorities like they should.
30174 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
30175 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
30176 - Fix a parsing error that made every possible value of
30177 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
30178 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
30179 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
30180 about the option without breaking older ones.
30181 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
30182 that claim to be earlier than 0.9.8m, but which have in reality
30183 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
30184 behavior. Possible fix for some cases of bug 1346.
30187 - Experiment with a more aggressive approach to preventing clients
30188 from making one-hop exit streams. Exit relays who want to try it
30189 out can set "RefuseUnknownExits 1" in their torrc, and then look
30190 for "Attempt by %s to open a stream" log messages. Let us know
30192 - Add support for statically linking zlib by specifying
30193 --enable-static-zlib, to go with our support for statically linking
30194 openssl and libevent. Resolves bug 1358.
30197 - Fix a segfault that happens whenever a Tor client that is using
30198 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
30200 - When we cleaned up the contrib/tor-exit-notice.html file, we left
30201 out the first line. Fixes bug 1295.
30202 - When building the manpage from a tarball, we required asciidoc, but
30203 the asciidoc -> roff/html conversion was already done for the
30204 tarball. Make 'make' complain only when we need asciidoc (either
30205 because we're compiling directly from git, or because we altered
30206 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
30207 - When none of the directory authorities vote on any params, Tor
30208 segfaulted when trying to make the consensus from the votes. We
30209 didn't trigger the bug in practice, because authorities do include
30210 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
30213 - In the util/threads test, no longer free the test_mutex before all
30214 worker threads have finished. Bugfix on 0.2.1.6-alpha.
30215 - The master thread could starve the worker threads quite badly on
30216 certain systems, causing them to run only partially in the allowed
30217 window. This resulted in test failures. Now the master thread sleeps
30218 occasionally for a few microseconds while the two worker-threads
30219 compete for the mutex. Bugfix on 0.2.0.1-alpha.
30222 Changes in version 0.2.2.10-alpha - 2010-03-07
30223 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
30224 could prevent relays from guessing their IP address correctly. It also
30225 starts the groundwork for another client-side performance boost, since
30226 currently we're not making efficient use of relays that have both the
30227 Guard flag and the Exit flag.
30230 - Fix a regression from our patch for bug 1244 that caused relays
30231 to guess their IP address incorrectly if they didn't set Address
30232 in their torrc and/or their address fails to resolve. Bugfix on
30233 0.2.2.9-alpha; fixes bug 1269.
30235 o Major features (performance):
30236 - Directory authorities now compute consensus weightings that instruct
30237 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
30238 and no flag. Clients that use these weightings will distribute
30239 network load more evenly across these different relay types. The
30240 weightings are in the consensus so we can change them globally in
30241 the future. Extra thanks to "outofwords" for finding some nasty
30242 security bugs in the first implementation of this feature.
30244 o Minor features (performance):
30245 - Always perform router selections using weighted relay bandwidth,
30246 even if we don't need a high capacity circuit at the time. Non-fast
30247 circuits now only differ from fast ones in that they can use relays
30248 not marked with the Fast flag. This "feature" could turn out to
30249 be a horrible bug; we should investigate more before it goes into
30253 - Allow disabling building of the manpages. Skipping the manpage
30254 speeds up the build considerably.
30256 o Minor bugfixes (on 0.2.2.x):
30257 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
30258 Bugfix on 0.2.2.9-alpha.
30259 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
30260 config option. Bugfix on 0.2.2.7-alpha.
30261 - Ship the asciidoc-helper file in the tarball, so that people can
30262 build from source if they want to, and touching the .1.txt files
30263 doesn't break the build. Bugfix on 0.2.2.9-alpha.
30265 o Minor bugfixes (on 0.2.1.x or earlier):
30266 - Fix a dereference-then-NULL-check sequence when publishing
30267 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
30269 - Fix another dereference-then-NULL-check sequence. Bugfix on
30270 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
30271 - Make sure we treat potentially not NUL-terminated strings correctly.
30272 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
30274 o Code simplifications and refactoring:
30275 - Fix some urls in the exit notice file and make it XHTML1.1 strict
30276 compliant. Based on a patch from Christian Kujau.
30277 - Don't use sed in asciidoc-helper anymore.
30278 - Make the build process fail if asciidoc cannot be found and
30279 building with asciidoc isn't disabled.
30282 Changes in version 0.2.2.9-alpha - 2010-02-22
30283 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
30284 location of a directory authority, and cleans up a bunch of small bugs.
30286 o Directory authority changes:
30287 - Change IP address for dannenberg (v3 directory authority), and
30288 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
30289 service directory authority) from the list.
30292 - Make Tor work again on the latest OS X: when deciding whether to
30293 use strange flags to turn TLS renegotiation on, detect the OpenSSL
30294 version at run-time, not compile time. We need to do this because
30295 Apple doesn't update its dev-tools headers when it updates its
30296 libraries in a security patch.
30297 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
30298 that could happen on 32-bit platforms with 64-bit time_t. Also fix
30299 a memory leak when requesting a hidden service descriptor we've
30300 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
30302 - Authorities could be tricked into giving out the Exit flag to relays
30303 that didn't allow exiting to any ports. This bug could screw
30304 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
30305 1238. Bug discovered by Martin Kowalczyk.
30306 - When freeing a session key, zero it out completely. We only zeroed
30307 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
30308 patched by ekir. Fixes bug 1254.
30311 - Fix static compilation by listing the openssl libraries in the right
30312 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
30313 - Resume handling .exit hostnames in a special way: originally we
30314 stripped the .exit part and used the requested exit relay. In
30315 0.2.2.1-alpha we stopped treating them in any special way, meaning
30316 if you use a .exit address then Tor will pass it on to the exit
30317 relay. Now we reject the .exit stream outright, since that behavior
30318 might be more expected by the user. Found and diagnosed by Scott
30319 Bennett and Downie on or-talk.
30320 - Don't spam the controller with events when we have no file
30321 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
30322 for log messages was already solved from bug 748.)
30323 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
30325 - Make the DNSPort option work with libevent 2.x. Don't alter the
30326 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
30327 - Emit a GUARD DROPPED controller event for a case we missed.
30328 - Make more fields in the controller protocol case-insensitive, since
30329 control-spec.txt said they were.
30330 - Refactor resolve_my_address() to not use gethostbyname() anymore.
30331 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
30332 - Fix a spec conformance issue: the network-status-version token
30333 must be the first token in a v3 consensus or vote. Discovered by
30334 parakeep. Bugfix on 0.2.0.3-alpha.
30336 o Code simplifications and refactoring:
30337 - Generate our manpage and HTML documentation using Asciidoc. This
30338 change should make it easier to maintain the documentation, and
30339 produce nicer HTML.
30340 - Remove the --enable-iphone option. According to reports from Marco
30341 Bonetti, Tor builds fine without any special tweaking on recent
30342 iPhone SDK versions.
30343 - Removed some unnecessary files from the source distribution. The
30344 AUTHORS file has now been merged into the people page on the
30345 website. The roadmaps and design doc can now be found in the
30346 projects directory in svn.
30347 - Enabled various circuit build timeout constants to be controlled
30348 by consensus parameters. Also set better defaults for these
30349 parameters based on experimentation on broadband and simulated
30350 high latency links.
30353 - The 'EXTENDCIRCUIT' control port command can now be used with
30354 a circ id of 0 and no path. This feature will cause Tor to build
30355 a new 'fast' general purpose circuit using its own path selection
30357 - Added a BUILDTIMEOUT_SET controller event to describe changes
30358 to the circuit build timeout.
30359 - Future-proof the controller protocol a bit by ignoring keyword
30360 arguments we do not recognize.
30361 - Expand homedirs passed to tor-checkkey. This should silence a
30362 coverity complaint about passing a user-supplied string into
30363 open() without checking it.
30366 Changes in version 0.2.1.25 - 2010-03-16
30367 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
30368 prevent relays from guessing their IP address correctly. It also fixes
30369 several minor potential security bugs.
30372 - Fix a regression from our patch for bug 1244 that caused relays
30373 to guess their IP address incorrectly if they didn't set Address
30374 in their torrc and/or their address fails to resolve. Bugfix on
30375 0.2.1.23; fixes bug 1269.
30376 - When freeing a session key, zero it out completely. We only zeroed
30377 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
30378 patched by ekir. Fixes bug 1254.
30381 - Fix a dereference-then-NULL-check sequence when publishing
30382 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
30384 - Fix another dereference-then-NULL-check sequence. Bugfix on
30385 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
30386 - Make sure we treat potentially not NUL-terminated strings correctly.
30387 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
30391 Changes in version 0.2.1.24 - 2010-02-21
30392 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
30396 - Work correctly out-of-the-box with even more vendor-patched versions
30397 of OpenSSL. In particular, make it so Debian and OS X don't need
30398 customized patches to run/build.
30401 Changes in version 0.2.1.23 - 2010-02-13
30402 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
30403 again on the latest OS X, and updates the location of a directory
30406 o Major bugfixes (performance):
30407 - We were selecting our guards uniformly at random, and then weighting
30408 which of our guards we'd use uniformly at random. This imbalance
30409 meant that Tor clients were severely limited on throughput (and
30410 probably latency too) by the first hop in their circuit. Now we
30411 select guards weighted by currently advertised bandwidth. We also
30412 automatically discard guards picked using the old algorithm. Fixes
30413 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
30416 - Make Tor work again on the latest OS X: when deciding whether to
30417 use strange flags to turn TLS renegotiation on, detect the OpenSSL
30418 version at run-time, not compile time. We need to do this because
30419 Apple doesn't update its dev-tools headers when it updates its
30420 libraries in a security patch.
30421 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
30422 that could happen on 32-bit platforms with 64-bit time_t. Also fix
30423 a memory leak when requesting a hidden service descriptor we've
30424 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
30427 o Directory authority changes:
30428 - Change IP address for dannenberg (v3 directory authority), and
30429 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
30430 service directory authority) from the list.
30433 - Refactor resolve_my_address() to not use gethostbyname() anymore.
30434 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
30437 - Avoid a mad rush at the beginning of each month when each client
30438 rotates half of its guards. Instead we spread the rotation out
30439 throughout the month, but we still avoid leaving a precise timestamp
30440 in the state file about when we first picked the guard. Improves
30441 over the behavior introduced in 0.1.2.17.
30444 Changes in version 0.2.2.8-alpha - 2010-01-26
30445 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
30446 causing bridge relays to disappear. If you're running a bridge,
30450 - Fix a memory corruption bug on bridges that occurred during the
30451 inclusion of stats data in extra-info descriptors. Also fix the
30452 interface for geoip_get_bridge_stats* to prevent similar bugs in
30453 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
30454 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
30457 - Ignore OutboundBindAddress when connecting to localhost.
30458 Connections to localhost need to come _from_ localhost, or else
30459 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
30463 Changes in version 0.2.2.7-alpha - 2010-01-19
30464 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
30465 as laying the groundwork for further relay-side performance fixes. It
30466 also starts cleaning up client behavior with respect to the EntryNodes,
30467 ExitNodes, and StrictNodes config options.
30469 This release also rotates two directory authority keys, due to a
30470 security breach of some of the Torproject servers.
30472 o Directory authority changes:
30473 - Rotate keys (both v3 identity and relay identity) for moria1
30476 o Major features (performance):
30477 - We were selecting our guards uniformly at random, and then weighting
30478 which of our guards we'd use uniformly at random. This imbalance
30479 meant that Tor clients were severely limited on throughput (and
30480 probably latency too) by the first hop in their circuit. Now we
30481 select guards weighted by currently advertised bandwidth. We also
30482 automatically discard guards picked using the old algorithm. Fixes
30483 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
30484 - When choosing which cells to relay first, relays can now favor
30485 circuits that have been quiet recently, to provide lower latency
30486 for low-volume circuits. By default, relays enable or disable this
30487 feature based on a setting in the consensus. You can override
30488 this default by using the new "CircuitPriorityHalflife" config
30489 option. Design and code by Ian Goldberg, Can Tang, and Chris
30491 - Add separate per-conn write limiting to go with the per-conn read
30492 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
30493 but never per-conn write limits.
30494 - New consensus params "bwconnrate" and "bwconnburst" to let us
30495 rate-limit client connections as they enter the network. It's
30496 controlled in the consensus so we can turn it on and off for
30497 experiments. It's starting out off. Based on proposal 163.
30499 o Major features (relay selection options):
30500 - Switch to a StrictNodes config option, rather than the previous
30501 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
30502 "StrictExcludeNodes" option.
30503 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
30504 change during a config reload, mark and discard all our origin
30505 circuits. This fix should address edge cases where we change the
30506 config options and but then choose a circuit that we created before
30508 - If EntryNodes or ExitNodes are set, be more willing to use an
30509 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
30511 - Make EntryNodes config option much more aggressive even when
30512 StrictNodes is not set. Before it would prepend your requested
30513 entrynodes to your list of guard nodes, but feel free to use others
30514 after that. Now it chooses only from your EntryNodes if any of
30515 those are available, and only falls back to others if a) they're
30516 all down and b) StrictNodes is not set.
30517 - Now we refresh your entry guards from EntryNodes at each consensus
30518 fetch -- rather than just at startup and then they slowly rot as
30519 the network changes.
30522 - Stop bridge directory authorities from answering dbg-stability.txt
30523 directory queries, which would let people fetch a list of all
30524 bridge identities they track. Bugfix on 0.2.1.6-alpha.
30527 - Log a notice when we get a new control connection. Now it's easier
30528 for security-conscious users to recognize when a local application
30529 is knocking on their controller door. Suggested by bug 1196.
30530 - New config option "CircuitStreamTimeout" to override our internal
30531 timeout schedule for how many seconds until we detach a stream from
30532 a circuit and try a new circuit. If your network is particularly
30533 slow, you might want to set this to a number like 60.
30534 - New controller command "getinfo config-text". It returns the
30535 contents that Tor would write if you send it a SAVECONF command,
30536 so the controller can write the file to disk itself.
30537 - New options for SafeLogging to allow scrubbing only log messages
30538 generated while acting as a relay.
30539 - Ship the bridges spec file in the tarball too.
30540 - Avoid a mad rush at the beginning of each month when each client
30541 rotates half of its guards. Instead we spread the rotation out
30542 throughout the month, but we still avoid leaving a precise timestamp
30543 in the state file about when we first picked the guard. Improves
30544 over the behavior introduced in 0.1.2.17.
30546 o Minor bugfixes (compiling):
30547 - Fix compilation on OS X 10.3, which has a stub mlockall() but
30548 hides it. Bugfix on 0.2.2.6-alpha.
30549 - Fix compilation on Solaris by removing support for the
30550 DisableAllSwap config option. Solaris doesn't have an rlimit for
30551 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
30554 o Minor bugfixes (crashes):
30555 - Do not segfault when writing buffer stats when we haven't observed
30556 a single circuit to report about. Found by Fabian Lanze. Bugfix on
30558 - If we're in the pathological case where there's no exit bandwidth
30559 but there is non-exit bandwidth, or no guard bandwidth but there
30560 is non-guard bandwidth, don't crash during path selection. Bugfix
30562 - Fix an impossible-to-actually-trigger buffer overflow in relay
30563 descriptor generation. Bugfix on 0.1.0.15.
30565 o Minor bugfixes (privacy):
30566 - Fix an instance where a Tor directory mirror might accidentally
30567 log the IP address of a misbehaving Tor client. Bugfix on
30569 - Don't list Windows capabilities in relay descriptors. We never made
30570 use of them, and maybe it's a bad idea to publish them. Bugfix
30573 o Minor bugfixes (other):
30574 - Resolve an edge case in path weighting that could make us misweight
30575 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
30576 - Fix statistics on client numbers by country as seen by bridges that
30577 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
30578 intervals instead of variable 12-to-48-hour intervals.
30579 - After we free an internal connection structure, overwrite it
30580 with a different memory value than we use for overwriting a freed
30581 internal circuit structure. Should help with debugging. Suggested
30583 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
30586 o Removed features:
30587 - Remove the HSAuthorityRecordStats option that version 0 hidden
30588 service authorities could have used to track statistics of overall
30589 hidden service usage.
30592 Changes in version 0.2.1.22 - 2010-01-19
30593 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
30594 authorities -- it would tell you its whole history of bridge descriptors
30595 if you make the right directory request. This stable update also
30596 rotates two of the seven v3 directory authority keys and locations.
30598 o Directory authority changes:
30599 - Rotate keys (both v3 identity and relay identity) for moria1
30603 - Stop bridge directory authorities from answering dbg-stability.txt
30604 directory queries, which would let people fetch a list of all
30605 bridge identities they track. Bugfix on 0.2.1.6-alpha.
30608 Changes in version 0.2.1.21 - 2009-12-21
30609 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
30610 library. If you use Tor on Linux / Unix and you're getting SSL
30611 renegotiation errors, upgrading should help. We also recommend an
30612 upgrade if you're an exit relay.
30615 - Work around a security feature in OpenSSL 0.9.8l that prevents our
30616 handshake from working unless we explicitly tell OpenSSL that we
30617 are using SSL renegotiation safely. We are, of course, but OpenSSL
30618 0.9.8l won't work unless we say we are.
30619 - Avoid crashing if the client is trying to upload many bytes and the
30620 circuit gets torn down at the same time, or if the flip side
30621 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
30624 - Do not refuse to learn about authority certs and v2 networkstatus
30625 documents that are older than the latest consensus. This bug might
30626 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
30627 Spotted and fixed by xmux.
30628 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
30629 trigger platform-specific option misparsing case found by Coverity
30631 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
30632 trigger assert. Fixes bug 1173.
30635 Changes in version 0.2.2.6-alpha - 2009-11-19
30636 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
30637 support for the new lower-footprint "microdescriptor" directory design,
30638 future-proofing our consensus format against new hash functions or
30639 other changes, and an Android port. It also makes Tor compatible with
30640 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
30643 - Directory authorities can now create, vote on, and serve multiple
30644 parallel formats of directory data as part of their voting process.
30645 Partially implements Proposal 162: "Publish the consensus in
30647 - Directory authorities can now agree on and publish small summaries
30648 of router information that clients can use in place of regular
30649 server descriptors. This transition will eventually allow clients
30650 to use far less bandwidth for downloading information about the
30651 network. Begins the implementation of Proposal 158: "Clients
30652 download consensus + microdescriptors".
30653 - The directory voting system is now extensible to use multiple hash
30654 algorithms for signatures and resource selection. Newer formats
30655 are signed with SHA256, with a possibility for moving to a better
30656 hash algorithm in the future.
30657 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
30658 current and future memory pages via mlockall(). On supported
30659 platforms (modern Linux and probably BSD but not Windows or OS X),
30660 this should effectively disable any and all attempts to page out
30661 memory. This option requires that you start your Tor as root --
30662 if you use DisableAllSwap, please consider using the User option
30663 to properly reduce the privileges of your Tor.
30664 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
30665 to help Tor build correctly for Android phones.
30668 - Work around a security feature in OpenSSL 0.9.8l that prevents our
30669 handshake from working unless we explicitly tell OpenSSL that we
30670 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
30671 won't work unless we say we are.
30674 - Fix a crash bug when trying to initialize the evdns module in
30675 Libevent 2. Bugfix on 0.2.1.16-rc.
30676 - Stop logging at severity 'warn' when some other Tor client tries
30677 to establish a circuit with us using weak DH keys. It's a protocol
30678 violation, but that doesn't mean ordinary users need to hear about
30679 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
30680 - Do not refuse to learn about authority certs and v2 networkstatus
30681 documents that are older than the latest consensus. This bug might
30682 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
30683 Spotted and fixed by xmux.
30684 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
30685 - If all authorities restart at once right before a consensus vote,
30686 nobody will vote about "Running", and clients will get a consensus
30687 with no usable relays. Instead, authorities refuse to build a
30688 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
30689 - If your relay can't keep up with the number of incoming create
30690 cells, it would log one warning per failure into your logs. Limit
30691 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
30692 - Bridges now use "reject *:*" as their default exit policy. Bugfix
30693 on 0.2.0.3-alpha; fixes bug 1113.
30694 - Fix a memory leak on directory authorities during voting that was
30695 introduced in 0.2.2.1-alpha. Found via valgrind.
30698 Changes in version 0.2.1.20 - 2009-10-15
30699 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
30700 services at once, prepares for more performance improvements, and
30701 fixes a bunch of smaller bugs.
30703 The Windows and OS X bundles also include a more recent Vidalia,
30704 and switch from Privoxy to Polipo.
30706 The OS X installers are now drag and drop. It's best to un-install
30707 Tor/Vidalia and then install this new bundle, rather than upgrade. If
30708 you want to upgrade, you'll need to update the paths for Tor and Polipo
30709 in the Vidalia Settings window.
30712 - Send circuit or stream sendme cells when our window has decreased
30713 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
30714 by Karsten when testing the "reduce circuit window" performance
30715 patch. Bugfix on the 54th commit on Tor -- from July 2002,
30716 before the release of Tor 0.0.0. This is the new winner of the
30718 - Fix a remotely triggerable memory leak when a consensus document
30719 contains more than one signature from the same voter. Bugfix on
30721 - Avoid segfault in rare cases when finishing an introduction circuit
30722 as a client and finding out that we don't have an introduction key
30723 for it. Fixes bug 1073. Reported by Aaron Swartz.
30726 - Tor now reads the "circwindow" parameter out of the consensus,
30727 and uses that value for its circuit package window rather than the
30728 default of 1000 cells. Begins the implementation of proposal 168.
30730 o New directory authorities:
30731 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
30733 - Move moria1 and tonga to alternate IP addresses.
30736 - Fix a signed/unsigned compile warning in 0.2.1.19.
30737 - Fix possible segmentation fault on directory authorities. Bugfix on
30739 - Fix an extremely rare infinite recursion bug that could occur if
30740 we tried to log a message after shutting down the log subsystem.
30741 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
30742 - Fix an obscure bug where hidden services on 64-bit big-endian
30743 systems might mis-read the timestamp in v3 introduce cells, and
30744 refuse to connect back to the client. Discovered by "rotor".
30745 Bugfix on 0.2.1.6-alpha.
30746 - We were triggering a CLOCK_SKEW controller status event whenever
30747 we connect via the v2 connection protocol to any relay that has
30748 a wrong clock. Instead, we should only inform the controller when
30749 it's a trusted authority that claims our clock is wrong. Bugfix
30750 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
30751 - We were telling the controller about CHECKING_REACHABILITY and
30752 REACHABILITY_FAILED status events whenever we launch a testing
30753 circuit or notice that one has failed. Instead, only tell the
30754 controller when we want to inform the user of overall success or
30755 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
30757 - Don't warn when we're using a circuit that ends with a node
30758 excluded in ExcludeExitNodes, but the circuit is not used to access
30759 the outside world. This should help fix bug 1090. Bugfix on
30761 - Work around a small memory leak in some versions of OpenSSL that
30762 stopped the memory used by the hostname TLS extension from being
30766 - Add a "getinfo status/accepted-server-descriptor" controller
30767 command, which is the recommended way for controllers to learn
30768 whether our server descriptor has been successfully received by at
30769 least on directory authority. Un-recommend good-server-descriptor
30770 getinfo and status events until we have a better design for them.
30773 Changes in version 0.2.2.5-alpha - 2009-10-11
30774 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
30777 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
30779 o Directory authorities:
30780 - Temporarily (just for this release) move dizum to an alternate
30784 Changes in version 0.2.2.4-alpha - 2009-10-10
30785 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
30786 introduces a new unit test framework, shifts directry authority
30787 addresses around to reduce the impact from recent blocking events,
30788 and fixes a few smaller bugs.
30791 - Fix several more asserts in the circuit_build_times code, for
30792 example one that causes Tor to fail to start once we have
30793 accumulated 5000 build times in the state file. Bugfixes on
30794 0.2.2.2-alpha; fixes bug 1108.
30796 o New directory authorities:
30797 - Move moria1 and Tonga to alternate IP addresses.
30800 - Log SSL state transitions at debug level during handshake, and
30801 include SSL states in error messages. This may help debug future
30802 SSL handshake issues.
30803 - Add a new "Handshake" log domain for activities that happen
30804 during the TLS handshake.
30805 - Revert to the "June 3 2009" ip-to-country file. The September one
30806 seems to have removed most US IP addresses.
30807 - Directory authorities now reject Tor relays with versions less than
30808 0.1.2.14. This step cuts out four relays from the current network,
30809 none of which are very big.
30812 - Fix a couple of smaller issues with gathering statistics. Bugfixes
30814 - Fix two memory leaks in the error case of
30815 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
30816 - Don't count one-hop circuits when we're estimating how long it
30817 takes circuits to build on average. Otherwise we'll set our circuit
30818 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
30819 - Directory authorities no longer change their opinion of, or vote on,
30820 whether a router is Running, unless they have themselves been
30821 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
30824 o Code simplifications and refactoring:
30825 - Revise our unit tests to use the "tinytest" framework, so we
30826 can run tests in their own processes, have smarter setup/teardown
30827 code, and so on. The unit test code has moved to its own
30828 subdirectory, and has been split into multiple modules.
30831 Changes in version 0.2.2.3-alpha - 2009-09-23
30832 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
30835 - Fix an overzealous assert in our new circuit build timeout code.
30836 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
30839 - If the networkstatus consensus tells us that we should use a
30840 negative circuit package window, ignore it. Otherwise we'll
30841 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
30844 Changes in version 0.2.2.2-alpha - 2009-09-21
30845 Tor 0.2.2.2-alpha introduces our latest performance improvement for
30846 clients: Tor tracks the average time it takes to build a circuit, and
30847 avoids using circuits that take too long to build. For fast connections,
30848 this feature can cut your expected latency in half. For slow or flaky
30849 connections, it could ruin your Tor experience. Let us know if it does!
30852 - Tor now tracks how long it takes to build client-side circuits
30853 over time, and adapts its timeout to local network performance.
30854 Since a circuit that takes a long time to build will also provide
30855 bad performance, we get significant latency improvements by
30856 discarding the slowest 20% of circuits. Specifically, Tor creates
30857 circuits more aggressively than usual until it has enough data
30858 points for a good timeout estimate. Implements proposal 151.
30859 We are especially looking for reports (good and bad) from users with
30860 both EDGE and broadband connections that can move from broadband
30861 to EDGE and find out if the build-time data in the .tor/state gets
30862 reset without loss of Tor usability. You should also see a notice
30863 log message telling you that Tor has reset its timeout.
30864 - Directory authorities can now vote on arbitrary integer values as
30865 part of the consensus process. This is designed to help set
30866 network-wide parameters. Implements proposal 167.
30867 - Tor now reads the "circwindow" parameter out of the consensus,
30868 and uses that value for its circuit package window rather than the
30869 default of 1000 cells. Begins the implementation of proposal 168.
30872 - Fix a remotely triggerable memory leak when a consensus document
30873 contains more than one signature from the same voter. Bugfix on
30877 - Fix an extremely rare infinite recursion bug that could occur if
30878 we tried to log a message after shutting down the log subsystem.
30879 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
30880 - Fix parsing for memory or time units given without a space between
30881 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
30882 - A networkstatus vote must contain exactly one signature. Spec
30883 conformance issue. Bugfix on 0.2.0.3-alpha.
30884 - Fix an obscure bug where hidden services on 64-bit big-endian
30885 systems might mis-read the timestamp in v3 introduce cells, and
30886 refuse to connect back to the client. Discovered by "rotor".
30887 Bugfix on 0.2.1.6-alpha.
30888 - We were triggering a CLOCK_SKEW controller status event whenever
30889 we connect via the v2 connection protocol to any relay that has
30890 a wrong clock. Instead, we should only inform the controller when
30891 it's a trusted authority that claims our clock is wrong. Bugfix
30892 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
30893 - We were telling the controller about CHECKING_REACHABILITY and
30894 REACHABILITY_FAILED status events whenever we launch a testing
30895 circuit or notice that one has failed. Instead, only tell the
30896 controller when we want to inform the user of overall success or
30897 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
30899 - Don't warn when we're using a circuit that ends with a node
30900 excluded in ExcludeExitNodes, but the circuit is not used to access
30901 the outside world. This should help fix bug 1090, but more problems
30902 remain. Bugfix on 0.2.1.6-alpha.
30903 - Work around a small memory leak in some versions of OpenSSL that
30904 stopped the memory used by the hostname TLS extension from being
30906 - Make our 'torify' script more portable; if we have only one of
30907 'torsocks' or 'tsocks' installed, don't complain to the user;
30908 and explain our warning about tsocks better.
30911 - Add a "getinfo status/accepted-server-descriptor" controller
30912 command, which is the recommended way for controllers to learn
30913 whether our server descriptor has been successfully received by at
30914 least on directory authority. Un-recommend good-server-descriptor
30915 getinfo and status events until we have a better design for them.
30916 - Update to the "September 4 2009" ip-to-country file.
30919 Changes in version 0.2.2.1-alpha - 2009-08-26
30920 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
30921 Tor clients to bootstrap on networks where only port 80 is reachable,
30922 makes it more straightforward to support hardware crypto accelerators,
30923 and starts the groundwork for gathering stats safely at relays.
30926 - Start the process of disabling ".exit" address notation, since it
30927 can be used for a variety of esoteric application-level attacks
30928 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
30931 o New directory authorities:
30932 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
30936 - New AccelName and AccelDir options add support for dynamic OpenSSL
30937 hardware crypto acceleration engines.
30938 - Tor now supports tunneling all of its outgoing connections over
30939 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
30940 configuration options. Code by Christopher Davis.
30943 - Send circuit or stream sendme cells when our window has decreased
30944 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
30945 by Karsten when testing the "reduce circuit window" performance
30946 patch. Bugfix on the 54th commit on Tor -- from July 2002,
30947 before the release of Tor 0.0.0. This is the new winner of the
30950 o New options for gathering stats safely:
30951 - Directory mirrors that set "DirReqStatistics 1" write statistics
30952 about directory requests to disk every 24 hours. As compared to the
30953 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
30954 1) stats are written to disk exactly every 24 hours; 2) estimated
30955 shares of v2 and v3 requests are determined as mean values, not at
30956 the end of a measurement period; 3) unresolved requests are listed
30957 with country code '??'; 4) directories also measure download times.
30958 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
30959 number of exit streams and transferred bytes per port to disk every
30961 - Relays that set "CellStatistics 1" write statistics on how long
30962 cells spend in their circuit queues to disk every 24 hours.
30963 - Entry nodes that set "EntryStatistics 1" write statistics on the
30964 rough number and origins of connecting clients to disk every 24
30966 - Relays that write any of the above statistics to disk and set
30967 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
30968 their extra-info documents.
30971 - New --digests command-line switch to output the digests of the
30972 source files Tor was built with.
30973 - The "torify" script now uses torsocks where available.
30974 - The memarea code now uses a sentinel value at the end of each area
30975 to make sure nothing writes beyond the end of an area. This might
30976 help debug some conceivable causes of bug 930.
30977 - Time and memory units in the configuration file can now be set to
30978 fractional units. For example, "2.5 GB" is now a valid value for
30980 - Certain Tor clients (such as those behind check.torproject.org) may
30981 want to fetch the consensus in an extra early manner. To enable this
30982 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
30983 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
30984 as only certain clients who must have this information sooner should
30986 - Instead of adding the svn revision to the Tor version string, report
30987 the git commit (when we're building from a git checkout).
30990 - If any of the v3 certs we download are unparseable, we should
30991 actually notice the failure so we don't retry indefinitely. Bugfix
30992 on 0.2.0.x; reported by "rotator".
30993 - If the cached cert file is unparseable, warn but don't exit.
30994 - Fix possible segmentation fault on directory authorities. Bugfix on
30996 - When Tor fails to parse a descriptor of any kind, dump it to disk.
30997 Might help diagnosing bug 1051.
30999 o Deprecated and removed features:
31000 - The controller no longer accepts the old obsolete "addr-mappings/"
31001 or "unregistered-servers-" GETINFO values.
31002 - Hidden services no longer publish version 0 descriptors, and clients
31003 do not request or use version 0 descriptors. However, the old hidden
31004 service authorities still accept and serve version 0 descriptors
31005 when contacted by older hidden services/clients.
31006 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
31007 always on; using them is necessary for correct forward-compatible
31009 - Remove support for .noconnect style addresses. Nobody was using
31010 them, and they provided another avenue for detecting Tor users
31011 via application-level web tricks.
31013 o Packaging changes:
31014 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
31015 installer bundles. See
31016 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
31017 for details of what's new in Vidalia 0.2.3.
31018 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
31019 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
31020 configuration file, rather than the old Privoxy.
31021 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
31022 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
31023 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
31024 better compatibility with OS X 10.6, aka Snow Leopard.
31025 - OS X Vidalia Bundle: The multi-package installer is now replaced
31026 by a simple drag and drop to the /Applications folder. This change
31027 occurred with the upgrade to Vidalia 0.2.3.
31030 Changes in version 0.2.1.19 - 2009-07-28
31031 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
31032 services on Tor 0.2.1.3-alpha through 0.2.1.18.
31035 - Make accessing hidden services on 0.2.1.x work right again.
31036 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
31037 part of patch provided by "optimist".
31040 - When a relay/bridge is writing out its identity key fingerprint to
31041 the "fingerprint" file and to its logs, write it without spaces. Now
31042 it will look like the fingerprints in our bridges documentation,
31043 and confuse fewer users.
31046 - Relays no longer publish a new server descriptor if they change
31047 their MaxAdvertisedBandwidth config option but it doesn't end up
31048 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
31049 fixes bug 1026. Patch from Sebastian.
31050 - Avoid leaking memory every time we get a create cell but we have
31051 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
31052 fixes bug 1034. Reported by BarkerJr.
31055 Changes in version 0.2.1.18 - 2009-07-24
31056 Tor 0.2.1.18 lays the foundations for performance improvements,
31057 adds status events to help users diagnose bootstrap problems, adds
31058 optional authentication/authorization for hidden services, fixes a
31059 variety of potential anonymity problems, and includes a huge pile of
31060 other features and bug fixes.
31063 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
31066 Changes in version 0.2.1.17-rc - 2009-07-07
31067 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
31068 candidate for the 0.2.1.x series. It lays the groundwork for further
31069 client performance improvements, and also fixes a big bug with directory
31070 authorities that were causing them to assign Guard and Stable flags
31073 The Windows bundles also finally include the geoip database that we
31074 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
31075 should actually install Torbutton rather than giving you a cryptic
31076 failure message (oops).
31079 - Clients now use the bandwidth values in the consensus, rather than
31080 the bandwidth values in each relay descriptor. This approach opens
31081 the door to more accurate bandwidth estimates once the directory
31082 authorities start doing active measurements. Implements more of
31086 - When Tor clients restart after 1-5 days, they discard all their
31087 cached descriptors as too old, but they still use the cached
31088 consensus document. This approach is good for robustness, but
31089 bad for performance: since they don't know any bandwidths, they
31090 end up choosing at random rather than weighting their choice by
31091 speed. Fixed by the above feature of putting bandwidths in the
31092 consensus. Bugfix on 0.2.0.x.
31093 - Directory authorities were neglecting to mark relays down in their
31094 internal histories if the relays fall off the routerlist without
31095 ever being found unreachable. So there were relays in the histories
31096 that haven't been seen for eight months, and are listed as being
31097 up for eight months. This wreaked havoc on the "median wfu"
31098 and "median mtbf" calculations, in turn making Guard and Stable
31099 flags very wrong, hurting network performance. Fixes bugs 696 and
31100 969. Bugfix on 0.2.0.6-alpha.
31103 - Serve the DirPortFrontPage page even when we have been approaching
31104 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
31105 - The control port would close the connection before flushing long
31106 replies, such as the network consensus, if a QUIT command was issued
31107 before the reply had completed. Now, the control port flushes all
31108 pending replies before closing the connection. Also fixed a spurious
31109 warning when a QUIT command is issued after a malformed or rejected
31110 AUTHENTICATE command, but before the connection was closed. Patch
31111 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
31112 - When we can't find an intro key for a v2 hidden service descriptor,
31113 fall back to the v0 hidden service descriptor and log a bug message.
31114 Workaround for bug 1024.
31115 - Fix a log message that did not respect the SafeLogging option.
31119 - If we're a relay and we change our IP address, be more verbose
31120 about the reason that made us change. Should help track down
31121 further bugs for relays on dynamic IP addresses.
31124 Changes in version 0.2.0.35 - 2009-06-24
31126 - Avoid crashing in the presence of certain malformed descriptors.
31127 Found by lark, and by automated fuzzing.
31128 - Fix an edge case where a malicious exit relay could convince a
31129 controller that the client's DNS question resolves to an internal IP
31130 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
31133 - Finally fix the bug where dynamic-IP relays disappear when their
31134 IP address changes: directory mirrors were mistakenly telling
31135 them their old address if they asked via begin_dir, so they
31136 never got an accurate answer about their new address, so they
31137 just vanished after a day. For belt-and-suspenders, relays that
31138 don't set Address in their config now avoid using begin_dir for
31139 all direct connections. Should fix bugs 827, 883, and 900.
31140 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
31141 that would occur on some exit nodes when DNS failures and timeouts
31142 occurred in certain patterns. Fix for bug 957.
31145 - When starting with a cache over a few days old, do not leak
31146 memory for the obsolete router descriptors in it. Bugfix on
31147 0.2.0.33; fixes bug 672.
31148 - Hidden service clients didn't use a cached service descriptor that
31149 was older than 15 minutes, but wouldn't fetch a new one either,
31150 because there was already one in the cache. Now, fetch a v2
31151 descriptor unless the same descriptor was added to the cache within
31152 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
31155 Changes in version 0.2.1.16-rc - 2009-06-20
31156 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
31157 a bunch of minor bugs.
31160 - Fix an edge case where a malicious exit relay could convince a
31161 controller that the client's DNS question resolves to an internal IP
31162 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
31164 o Major performance improvements (on 0.2.0.x):
31165 - Disable and refactor some debugging checks that forced a linear scan
31166 over the whole server-side DNS cache. These accounted for over 50%
31167 of CPU time on a relatively busy exit node's gprof profile. Found
31169 - Disable some debugging checks that appeared in exit node profile
31173 - Update to the "June 3 2009" ip-to-country file.
31174 - Do not have tor-resolve automatically refuse all .onion addresses;
31175 if AutomapHostsOnResolve is set in your torrc, this will work fine.
31177 o Minor bugfixes (on 0.2.0.x):
31178 - Log correct error messages for DNS-related network errors on
31180 - Fix a race condition that could cause crashes or memory corruption
31181 when running as a server with a controller listening for log
31183 - Avoid crashing when we have a policy specified in a DirPolicy or
31184 SocksPolicy or ReachableAddresses option with ports set on it,
31185 and we re-load the policy. May fix bug 996.
31186 - Hidden service clients didn't use a cached service descriptor that
31187 was older than 15 minutes, but wouldn't fetch a new one either,
31188 because there was already one in the cache. Now, fetch a v2
31189 descriptor unless the same descriptor was added to the cache within
31190 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
31192 o Minor bugfixes (on 0.2.1.x):
31193 - Don't warn users about low port and hibernation mix when they
31194 provide a *ListenAddress directive to fix that. Bugfix on
31196 - When switching back and forth between bridge mode, do not start
31197 gathering GeoIP data until two hours have passed.
31198 - Do not complain that the user has requested an excluded node as
31199 an exit when the node is not really an exit. This could happen
31200 because the circuit was for testing, or an introduction point.
31204 Changes in version 0.2.1.15-rc - 2009-05-25
31205 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
31206 series. It fixes a major bug on fast exit relays, as well as a variety
31207 of more minor bugs.
31209 o Major bugfixes (on 0.2.0.x):
31210 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
31211 that would occur on some exit nodes when DNS failures and timeouts
31212 occurred in certain patterns. Fix for bug 957.
31214 o Minor bugfixes (on 0.2.0.x):
31215 - Actually return -1 in the error case for read_bandwidth_usage().
31216 Harmless bug, since we currently don't care about the return value
31217 anywhere. Bugfix on 0.2.0.9-alpha.
31218 - Provide a more useful log message if bug 977 (related to buffer
31219 freelists) ever reappears, and do not crash right away.
31220 - Fix an assertion failure on 64-bit platforms when we allocated
31221 memory right up to the end of a memarea, then realigned the memory
31222 one step beyond the end. Fixes a possible cause of bug 930.
31223 - Protect the count of open sockets with a mutex, so we can't
31224 corrupt it when two threads are closing or opening sockets at once.
31225 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
31226 - Don't allow a bridge to publish its router descriptor to a
31227 non-bridge directory authority. Fixes part of bug 932.
31228 - When we change to or from being a bridge, reset our counts of
31229 client usage by country. Fixes bug 932.
31230 - Fix a bug that made stream bandwidth get misreported to the
31232 - Stop using malloc_usable_size() to use more area than we had
31233 actually allocated: it was safe, but made valgrind really unhappy.
31234 - Fix a memory leak when v3 directory authorities load their keys
31235 and cert from disk. Bugfix on 0.2.0.1-alpha.
31237 o Minor bugfixes (on 0.2.1.x):
31238 - Fix use of freed memory when deciding to mark a non-addable
31239 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
31242 Changes in version 0.2.1.14-rc - 2009-04-12
31243 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
31244 series. It begins fixing some major performance problems, and also
31245 finally addresses the bug that was causing relays on dynamic IP
31246 addresses to fall out of the directory.
31249 - Clients replace entry guards that were chosen more than a few months
31250 ago. This change should significantly improve client performance,
31251 especially once more people upgrade, since relays that have been
31252 a guard for a long time are currently overloaded.
31254 o Major bugfixes (on 0.2.0):
31255 - Finally fix the bug where dynamic-IP relays disappear when their
31256 IP address changes: directory mirrors were mistakenly telling
31257 them their old address if they asked via begin_dir, so they
31258 never got an accurate answer about their new address, so they
31259 just vanished after a day. For belt-and-suspenders, relays that
31260 don't set Address in their config now avoid using begin_dir for
31261 all direct connections. Should fix bugs 827, 883, and 900.
31262 - Relays were falling out of the networkstatus consensus for
31263 part of a day if they changed their local config but the
31264 authorities discarded their new descriptor as "not sufficiently
31265 different". Now directory authorities accept a descriptor as changed
31266 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
31267 patch by Sebastian.
31268 - Avoid crashing in the presence of certain malformed descriptors.
31269 Found by lark, and by automated fuzzing.
31272 - When generating circuit events with verbose nicknames for
31273 controllers, try harder to look up nicknames for routers on a
31274 circuit. (Previously, we would look in the router descriptors we had
31275 for nicknames, but not in the consensus.) Partial fix for bug 941.
31276 - If the bridge config line doesn't specify a port, assume 443.
31277 This makes bridge lines a bit smaller and easier for users to
31279 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
31280 bytes (aka 20KB/s), to match our documentation. Also update
31281 directory authorities so they always assign the Fast flag to relays
31282 with 20KB/s of capacity. Now people running relays won't suddenly
31283 find themselves not seeing any use, if the network gets faster
31285 - Update to the "April 3 2009" ip-to-country file.
31288 - Avoid trying to print raw memory to the logs when we decide to
31289 give up on downloading a given relay descriptor. Bugfix on
31291 - In tor-resolve, when the Tor client to use is specified by
31292 <hostname>:<port>, actually use the specified port rather than
31293 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
31294 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
31295 - When starting with a cache over a few days old, do not leak
31296 memory for the obsolete router descriptors in it. Bugfix on
31298 - Avoid double-free on list of successfully uploaded hidden
31299 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
31300 - Change memarea_strndup() implementation to work even when
31301 duplicating a string at the end of a page. This bug was
31302 harmless for now, but could have meant crashes later. Fix by
31303 lark. Bugfix on 0.2.1.1-alpha.
31304 - Limit uploaded directory documents to be 16M rather than 500K.
31305 The directory authorities were refusing v3 consensus votes from
31306 other authorities, since the votes are now 504K. Fixes bug 959;
31307 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
31308 - Directory authorities should never send a 503 "busy" response to
31309 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
31313 Changes in version 0.2.1.13-alpha - 2009-03-09
31314 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
31315 cleanups. We're finally getting close to a release candidate.
31318 - Correctly update the list of which countries we exclude as
31319 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
31320 lark. Bugfix on 0.2.1.6-alpha.
31322 o Minor bugfixes (on 0.2.0.x and earlier):
31323 - Automatically detect MacOSX versions earlier than 10.4.0, and
31324 disable kqueue from inside Tor when running with these versions.
31325 We previously did this from the startup script, but that was no
31326 help to people who didn't use the startup script. Resolves bug 863.
31327 - When we had picked an exit node for a connection, but marked it as
31328 "optional", and it turned out we had no onion key for the exit,
31329 stop wanting that exit and try again. This situation may not
31330 be possible now, but will probably become feasible with proposal
31331 158. Spotted by rovv. Fixes another case of bug 752.
31332 - Clients no longer cache certificates for authorities they do not
31333 recognize. Bugfix on 0.2.0.9-alpha.
31334 - When we can't transmit a DNS request due to a network error, retry
31335 it after a while, and eventually transmit a failing response to
31336 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
31337 - If the controller claimed responsibility for a stream, but that
31338 stream never finished making its connection, it would live
31339 forever in circuit_wait state. Now we close it after SocksTimeout
31340 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
31341 - Drop begin cells to a hidden service if they come from the middle
31342 of a circuit. Patch from lark.
31343 - When we erroneously receive two EXTEND cells for the same circuit
31344 ID on the same connection, drop the second. Patch from lark.
31345 - Fix a crash that occurs on exit nodes when a nameserver request
31346 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
31347 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
31349 - Do not assume that a stack-allocated character array will be
31350 64-bit aligned on platforms that demand that uint64_t access is
31351 aligned. Possible fix for bug 604.
31352 - Parse dates and IPv4 addresses in a locale- and libc-independent
31353 manner, to avoid platform-dependent behavior on malformed input.
31354 - Build correctly when configured to build outside the main source
31355 path. Patch from Michael Gold.
31356 - We were already rejecting relay begin cells with destination port
31357 of 0. Now also reject extend cells with destination port or address
31358 of 0. Suggested by lark.
31360 o Minor bugfixes (on 0.2.1.x):
31361 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
31362 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
31363 - If we're an exit node, scrub the IP address to which we are exiting
31364 in the logs. Bugfix on 0.2.1.8-alpha.
31367 - On Linux, use the prctl call to re-enable core dumps when the user
31369 - New controller event NEWCONSENSUS that lists the networkstatus
31370 lines for every recommended relay. Now controllers like Torflow
31371 can keep up-to-date on which relays they should be using.
31372 - Update to the "February 26 2009" ip-to-country file.
31375 Changes in version 0.2.0.34 - 2009-02-08
31376 Tor 0.2.0.34 features several more security-related fixes. You should
31377 upgrade, especially if you run an exit relay (remote crash) or a
31378 directory authority (remote infinite loop), or you're on an older
31379 (pre-XP) or not-recently-patched Windows (remote exploit).
31381 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
31382 have many known flaws, and nobody should be using them. You should
31383 upgrade. If you're using a Linux or BSD and its packages are obsolete,
31384 stop using those packages and upgrade anyway.
31387 - Fix an infinite-loop bug on handling corrupt votes under certain
31388 circumstances. Bugfix on 0.2.0.8-alpha.
31389 - Fix a temporary DoS vulnerability that could be performed by
31390 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
31391 - Avoid a potential crash on exit nodes when processing malformed
31392 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
31393 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
31394 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
31397 - Fix compilation on systems where time_t is a 64-bit integer.
31398 Patch from Matthias Drochner.
31399 - Don't consider expiring already-closed client connections. Fixes
31400 bug 893. Bugfix on 0.0.2pre20.
31403 Changes in version 0.2.1.12-alpha - 2009-02-08
31404 Tor 0.2.1.12-alpha features several more security-related fixes. You
31405 should upgrade, especially if you run an exit relay (remote crash) or
31406 a directory authority (remote infinite loop), or you're on an older
31407 (pre-XP) or not-recently-patched Windows (remote exploit). It also
31408 includes a big pile of minor bugfixes and cleanups.
31411 - Fix an infinite-loop bug on handling corrupt votes under certain
31412 circumstances. Bugfix on 0.2.0.8-alpha.
31413 - Fix a temporary DoS vulnerability that could be performed by
31414 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
31415 - Avoid a potential crash on exit nodes when processing malformed
31416 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
31419 - Let controllers actually ask for the "clients_seen" event for
31420 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
31421 reported by Matt Edman.
31422 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
31424 - Fix a bug in address parsing that was preventing bridges or hidden
31425 service targets from being at IPv6 addresses.
31426 - Solve a bug that kept hardware crypto acceleration from getting
31427 enabled when accounting was turned on. Fixes bug 907. Bugfix on
31429 - Remove a bash-ism from configure.in to build properly on non-Linux
31430 platforms. Bugfix on 0.2.1.1-alpha.
31431 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
31432 headers. Bugfix on 0.2.0.10-alpha.
31433 - Don't consider expiring already-closed client connections. Fixes
31434 bug 893. Bugfix on 0.0.2pre20.
31435 - Fix another interesting corner-case of bug 891 spotted by rovv:
31436 Previously, if two hosts had different amounts of clock drift, and
31437 one of them created a new connection with just the wrong timing,
31438 the other might decide to deprecate the new connection erroneously.
31439 Bugfix on 0.1.1.13-alpha.
31440 - Resolve a very rare crash bug that could occur when the user forced
31441 a nameserver reconfiguration during the middle of a nameserver
31442 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
31443 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
31444 Bugfix on 0.2.1.7-alpha.
31445 - If we're using bridges and our network goes away, be more willing
31446 to forgive our bridges and try again when we get an application
31447 request. Bugfix on 0.2.0.x.
31450 - Support platforms where time_t is 64 bits long. (Congratulations,
31451 NetBSD!) Patch from Matthias Drochner.
31452 - Add a 'getinfo status/clients-seen' controller command, in case
31453 controllers want to hear clients_seen events but connect late.
31456 - Disable GCC's strict alias optimization by default, to avoid the
31457 likelihood of its introducing subtle bugs whenever our code violates
31458 the letter of C99's alias rules.
31461 Changes in version 0.2.0.33 - 2009-01-21
31462 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
31463 useful to users. It also finally fixes a bug where a relay or client
31464 that's been off for many days would take a long time to bootstrap.
31466 This update also fixes an important security-related bug reported by
31467 Ilja van Sprundel. You should upgrade. (We'll send out more details
31468 about the bug once people have had some time to upgrade.)
31471 - Fix a heap-corruption bug that may be remotely triggerable on
31472 some platforms. Reported by Ilja van Sprundel.
31475 - When a stream at an exit relay is in state "resolving" or
31476 "connecting" and it receives an "end" relay cell, the exit relay
31477 would silently ignore the end cell and not close the stream. If
31478 the client never closes the circuit, then the exit relay never
31479 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
31480 reported by "wood".
31481 - When sending CREATED cells back for a given circuit, use a 64-bit
31482 connection ID to find the right connection, rather than an addr:port
31483 combination. Now that we can have multiple OR connections between
31484 the same ORs, it is no longer possible to use addr:port to uniquely
31485 identify a connection.
31486 - Bridge relays that had DirPort set to 0 would stop fetching
31487 descriptors shortly after startup, and then briefly resume
31488 after a new bandwidth test and/or after publishing a new bridge
31489 descriptor. Bridge users that try to bootstrap from them would
31490 get a recent networkstatus but would get descriptors from up to
31491 18 hours earlier, meaning most of the descriptors were obsolete
31492 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
31493 - Prevent bridge relays from serving their 'extrainfo' document
31494 to anybody who asks, now that extrainfo docs include potentially
31495 sensitive aggregated client geoip summaries. Bugfix on
31497 - If the cached networkstatus consensus is more than five days old,
31498 discard it rather than trying to use it. In theory it could be
31499 useful because it lists alternate directory mirrors, but in practice
31500 it just means we spend many minutes trying directory mirrors that
31501 are long gone from the network. Also discard router descriptors as
31502 we load them if they are more than five days old, since the onion
31503 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
31506 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
31507 could make gcc generate non-functional binary search code. Bugfix
31509 - Build correctly on platforms without socklen_t.
31510 - Compile without warnings on solaris.
31511 - Avoid potential crash on internal error during signature collection.
31512 Fixes bug 864. Patch from rovv.
31513 - Correct handling of possible malformed authority signing key
31514 certificates with internal signature types. Fixes bug 880.
31515 Bugfix on 0.2.0.3-alpha.
31516 - Fix a hard-to-trigger resource leak when logging credential status.
31518 - When we can't initialize DNS because the network is down, do not
31519 automatically stop Tor from starting. Instead, we retry failed
31520 dns_init() every 10 minutes, and change the exit policy to reject
31521 *:* until one succeeds. Fixes bug 691.
31522 - Use 64 bits instead of 32 bits for connection identifiers used with
31523 the controller protocol, to greatly reduce risk of identifier reuse.
31524 - When we're choosing an exit node for a circuit, and we have
31525 no pending streams, choose a good general exit rather than one that
31526 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
31527 - Fix another case of assuming, when a specific exit is requested,
31528 that we know more than the user about what hosts it allows.
31529 Fixes one case of bug 752. Patch from rovv.
31530 - Clip the MaxCircuitDirtiness config option to a minimum of 10
31531 seconds. Warn the user if lower values are given in the
31532 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
31533 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
31534 user if lower values are given in the configuration. Bugfix on
31535 0.1.1.17-rc. Patch by Sebastian.
31536 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
31537 the cache because we already had a v0 descriptor with the same ID.
31538 Bugfix on 0.2.0.18-alpha.
31539 - Fix a race condition when freeing keys shared between main thread
31540 and CPU workers that could result in a memory leak. Bugfix on
31541 0.1.0.1-rc. Fixes bug 889.
31542 - Send a valid END cell back when a client tries to connect to a
31543 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
31544 840. Patch from rovv.
31545 - Check which hops rendezvous stream cells are associated with to
31546 prevent possible guess-the-streamid injection attacks from
31547 intermediate hops. Fixes another case of bug 446. Based on patch
31549 - If a broken client asks a non-exit router to connect somewhere,
31550 do not even do the DNS lookup before rejecting the connection.
31551 Fixes another case of bug 619. Patch from rovv.
31552 - When a relay gets a create cell it can't decrypt (e.g. because it's
31553 using the wrong onion key), we were dropping it and letting the
31554 client time out. Now actually answer with a destroy cell. Fixes
31555 bug 904. Bugfix on 0.0.2pre8.
31557 o Minor bugfixes (hidden services):
31558 - Do not throw away existing introduction points on SIGHUP. Bugfix on
31559 0.0.6pre1. Patch by Karsten. Fixes bug 874.
31562 - Report the case where all signatures in a detached set are rejected
31563 differently than the case where there is an error handling the
31565 - When we realize that another process has modified our cached
31566 descriptors, print out a more useful error message rather than
31567 triggering an assertion. Fixes bug 885. Patch from Karsten.
31568 - Implement the 0x20 hack to better resist DNS poisoning: set the
31569 case on outgoing DNS requests randomly, and reject responses that do
31570 not match the case correctly. This logic can be disabled with the
31571 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
31572 of servers that do not reliably preserve case in replies. See
31573 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
31575 - Check DNS replies for more matching fields to better resist DNS
31577 - Never use OpenSSL compression: it wastes RAM and CPU trying to
31578 compress cells, which are basically all encrypted, compressed, or
31582 Changes in version 0.2.1.11-alpha - 2009-01-20
31583 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
31584 week it will take a long time to bootstrap again" bug. It also fixes
31585 an important security-related bug reported by Ilja van Sprundel. You
31586 should upgrade. (We'll send out more details about the bug once people
31587 have had some time to upgrade.)
31590 - Fix a heap-corruption bug that may be remotely triggerable on
31591 some platforms. Reported by Ilja van Sprundel.
31594 - Discard router descriptors as we load them if they are more than
31595 five days old. Otherwise if Tor is off for a long time and then
31596 starts with cached descriptors, it will try to use the onion
31597 keys in those obsolete descriptors when building circuits. Bugfix
31598 on 0.2.0.x. Fixes bug 887.
31601 - Try to make sure that the version of Libevent we're running with
31602 is binary-compatible with the one we built with. May address bug
31604 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
31605 for bug 905. Bugfix on 0.2.1.7-alpha.
31606 - Add a new --enable-local-appdata configuration switch to change
31607 the default location of the datadir on win32 from APPDATA to
31608 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
31609 entirely. Patch from coderman.
31612 - Make outbound DNS packets respect the OutboundBindAddress setting.
31613 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
31614 - When our circuit fails at the first hop (e.g. we get a destroy
31615 cell back), avoid using that OR connection anymore, and also
31616 tell all the one-hop directory requests waiting for it that they
31617 should fail. Bugfix on 0.2.1.3-alpha.
31618 - In the torify(1) manpage, mention that tsocks will leak your
31622 Changes in version 0.2.1.10-alpha - 2009-01-06
31623 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
31624 would make the bridge relay not so useful if it had DirPort set to 0,
31625 and one that could let an attacker learn a little bit of information
31626 about the bridge's users), and a bug that would cause your Tor relay
31627 to ignore a circuit create request it can't decrypt (rather than reply
31628 with an error). It also fixes a wide variety of other bugs.
31631 - If the cached networkstatus consensus is more than five days old,
31632 discard it rather than trying to use it. In theory it could
31633 be useful because it lists alternate directory mirrors, but in
31634 practice it just means we spend many minutes trying directory
31635 mirrors that are long gone from the network. Helps bug 887 a bit;
31637 - Bridge relays that had DirPort set to 0 would stop fetching
31638 descriptors shortly after startup, and then briefly resume
31639 after a new bandwidth test and/or after publishing a new bridge
31640 descriptor. Bridge users that try to bootstrap from them would
31641 get a recent networkstatus but would get descriptors from up to
31642 18 hours earlier, meaning most of the descriptors were obsolete
31643 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
31644 - Prevent bridge relays from serving their 'extrainfo' document
31645 to anybody who asks, now that extrainfo docs include potentially
31646 sensitive aggregated client geoip summaries. Bugfix on
31650 - New controller event "clients_seen" to report a geoip-based summary
31651 of which countries we've seen clients from recently. Now controllers
31652 like Vidalia can show bridge operators that they're actually making
31654 - Build correctly against versions of OpenSSL 0.9.8 or later built
31655 without support for deprecated functions.
31656 - Update to the "December 19 2008" ip-to-country file.
31658 o Minor bugfixes (on 0.2.0.x):
31659 - Authorities now vote for the Stable flag for any router whose
31660 weighted MTBF is at least 5 days, regardless of the mean MTBF.
31661 - Do not remove routers as too old if we do not have any consensus
31662 document. Bugfix on 0.2.0.7-alpha.
31663 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
31664 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
31665 - When an exit relay resolves a stream address to a local IP address,
31666 do not just keep retrying that same exit relay over and
31667 over. Instead, just close the stream. Addresses bug 872. Bugfix
31668 on 0.2.0.32. Patch from rovv.
31669 - If a hidden service sends us an END cell, do not consider
31670 retrying the connection; just close it. Patch from rovv.
31671 - When we made bridge authorities stop serving bridge descriptors over
31672 unencrypted links, we also broke DirPort reachability testing for
31673 bridges. So bridges with a non-zero DirPort were printing spurious
31674 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
31675 - When a relay gets a create cell it can't decrypt (e.g. because it's
31676 using the wrong onion key), we were dropping it and letting the
31677 client time out. Now actually answer with a destroy cell. Fixes
31678 bug 904. Bugfix on 0.0.2pre8.
31679 - Squeeze 2-5% out of client performance (according to oprofile) by
31680 improving the implementation of some policy-manipulation functions.
31682 o Minor bugfixes (on 0.2.1.x):
31683 - Make get_interface_address() function work properly again; stop
31684 guessing the wrong parts of our address as our address.
31685 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
31686 send on that circuit. Otherwise we might violate the proposal-110
31687 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
31689 - When we're sending non-EXTEND cells to the first hop in a circuit,
31690 for example to use an encrypted directory connection, we don't need
31691 to use RELAY_EARLY cells: the first hop knows what kind of cell
31692 it is, and nobody else can even see the cell type. Conserving
31693 RELAY_EARLY cells makes it easier to cannibalize circuits like
31695 - Stop logging nameserver addresses in reverse order.
31696 - If we are retrying a directory download slowly over and over, do
31697 not automatically give up after the 254th failure. Bugfix on
31699 - Resume reporting accurate "stream end" reasons to the local control
31700 port. They were lost in the changes for Proposal 148. Bugfix on
31703 o Deprecated and removed features:
31704 - The old "tor --version --version" command, which would print out
31705 the subversion "Id" of most of the source files, is now removed. It
31706 turned out to be less useful than we'd expected, and harder to
31709 o Code simplifications and refactoring:
31710 - Change our header file guard macros to be less likely to conflict
31711 with system headers. Adam Langley noticed that we were conflicting
31712 with log.h on Android.
31713 - Tool-assisted documentation cleanup. Nearly every function or
31714 static variable in Tor should have its own documentation now.
31717 Changes in version 0.2.1.9-alpha - 2008-12-25
31718 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
31720 o New directory authorities:
31721 - gabelmoo (the authority run by Karsten Loesing) now has a new
31725 - Never use a connection with a mismatched address to extend a
31726 circuit, unless that connection is canonical. A canonical
31727 connection is one whose address is authenticated by the router's
31728 identity key, either in a NETINFO cell or in a router descriptor.
31729 - Avoid a possible memory corruption bug when receiving hidden service
31730 descriptors. Bugfix on 0.2.1.6-alpha.
31733 - Fix a logic error that would automatically reject all but the first
31734 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
31735 part of bug 813/868. Bug spotted by coderman.
31736 - When a stream at an exit relay is in state "resolving" or
31737 "connecting" and it receives an "end" relay cell, the exit relay
31738 would silently ignore the end cell and not close the stream. If
31739 the client never closes the circuit, then the exit relay never
31740 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
31741 reported by "wood".
31742 - When we can't initialize DNS because the network is down, do not
31743 automatically stop Tor from starting. Instead, retry failed
31744 dns_init() every 10 minutes, and change the exit policy to reject
31745 *:* until one succeeds. Fixes bug 691.
31748 - Give a better error message when an overzealous init script says
31749 "sudo -u username tor --user username". Makes Bug 882 easier for
31751 - When a directory authority gives us a new guess for our IP address,
31752 log which authority we used. Hopefully this will help us debug
31753 the recent complaints about bad IP address guesses.
31754 - Detect svn revision properly when we're using git-svn.
31755 - Try not to open more than one descriptor-downloading connection
31756 to an authority at once. This should reduce load on directory
31757 authorities. Fixes bug 366.
31758 - Add cross-certification to newly generated certificates, so that
31759 a signing key is enough information to look up a certificate.
31760 Partial implementation of proposal 157.
31761 - Start serving certificates by <identity digest, signing key digest>
31762 pairs. Partial implementation of proposal 157.
31763 - Clients now never report any stream end reason except 'MISC'.
31764 Implements proposal 148.
31765 - On platforms with a maximum syslog string length, truncate syslog
31766 messages to that length ourselves, rather than relying on the
31767 system to do it for us.
31768 - Optimize out calls to time(NULL) that occur for every IO operation,
31769 or for every cell. On systems where time() is a slow syscall,
31770 this fix will be slightly helpful.
31771 - Exit servers can now answer resolve requests for ip6.arpa addresses.
31772 - When we download a descriptor that we then immediately (as
31773 a directory authority) reject, do not retry downloading it right
31774 away. Should save some bandwidth on authorities. Fix for bug
31775 888. Patch by Sebastian Hahn.
31776 - When a download gets us zero good descriptors, do not notify
31777 Tor that new directory information has arrived.
31778 - Avoid some nasty corner cases in the logic for marking connections
31779 as too old or obsolete or noncanonical for circuits. Partial
31782 o Minor features (controller):
31783 - New CONSENSUS_ARRIVED event to note when a new consensus has
31784 been fetched and validated.
31785 - When we realize that another process has modified our cached
31786 descriptors file, print out a more useful error message rather
31787 than triggering an assertion. Fixes bug 885. Patch from Karsten.
31788 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
31789 controllers to prevent SIGHUP from reloading the
31790 configuration. Fixes bug 856.
31793 - Resume using the correct "REASON=" stream when telling the
31794 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
31795 - When a canonical connection appears later in our internal list
31796 than a noncanonical one for a given OR ID, always use the
31797 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
31799 - Clip the MaxCircuitDirtiness config option to a minimum of 10
31800 seconds. Warn the user if lower values are given in the
31801 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
31802 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
31803 user if lower values are given in the configuration. Bugfix on
31804 0.1.1.17-rc. Patch by Sebastian.
31805 - Fix a race condition when freeing keys shared between main thread
31806 and CPU workers that could result in a memory leak. Bugfix on
31807 0.1.0.1-rc. Fixes bug 889.
31809 o Minor bugfixes (hidden services):
31810 - Do not throw away existing introduction points on SIGHUP (bugfix on
31811 0.0.6pre1); also, do not stall hidden services because we're
31812 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
31813 by John Brooks. Patch by Karsten. Fixes bug 874.
31814 - Fix a memory leak when we decline to add a v2 rendezvous
31815 descriptor to the cache because we already had a v0 descriptor
31816 with the same ID. Bugfix on 0.2.0.18-alpha.
31818 o Deprecated and removed features:
31819 - RedirectExits has been removed. It was deprecated since
31821 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
31822 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
31823 - Cell pools are now always enabled; --disable-cell-pools is ignored.
31825 o Code simplifications and refactoring:
31826 - Rename the confusing or_is_obsolete field to the more appropriate
31827 is_bad_for_new_circs, and move it to or_connection_t where it
31829 - Move edge-only flags from connection_t to edge_connection_t: not
31830 only is this better coding, but on machines of plausible alignment,
31831 it should save 4-8 bytes per connection_t. "Every little bit helps."
31832 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
31833 for consistency; keep old option working for backward compatibility.
31834 - Simplify the code for finding connections to use for a circuit.
31837 Changes in version 0.2.1.8-alpha - 2008-12-08
31838 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
31839 builds better on unusual platforms like Solaris and old OS X, and
31840 fixes a variety of other issues.
31843 - New DirPortFrontPage option that takes an html file and publishes
31844 it as "/" on the DirPort. Now relay operators can provide a
31845 disclaimer without needing to set up a separate webserver. There's
31846 a sample disclaimer in contrib/tor-exit-notice.html.
31849 - When the client is choosing entry guards, now it selects at most
31850 one guard from a given relay family. Otherwise we could end up with
31851 all of our entry points into the network run by the same operator.
31852 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
31855 - Fix a DOS opportunity during the voting signature collection process
31856 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
31857 - Fix a possible segfault when establishing an exit connection. Bugfix
31861 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
31863 - Made Tor a little less aggressive about deleting expired
31864 certificates. Partial fix for bug 854.
31865 - Stop doing unaligned memory access that generated bus errors on
31866 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
31867 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
31868 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
31869 - Make USR2 log-level switch take effect immediately. Bugfix on
31871 - If one win32 nameserver fails to get added, continue adding the
31872 rest, and don't automatically fail.
31873 - Use fcntl() for locking when flock() is not available. Should fix
31874 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
31875 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
31876 could make gcc generate non-functional binary search code. Bugfix
31878 - Build correctly on platforms without socklen_t.
31879 - Avoid potential crash on internal error during signature collection.
31880 Fixes bug 864. Patch from rovv.
31881 - Do not use C's stdio library for writing to log files. This will
31882 improve logging performance by a minute amount, and will stop
31883 leaking fds when our disk is full. Fixes bug 861.
31884 - Stop erroneous use of O_APPEND in cases where we did not in fact
31885 want to re-seek to the end of a file before every last write().
31886 - Correct handling of possible malformed authority signing key
31887 certificates with internal signature types. Fixes bug 880. Bugfix
31889 - Fix a hard-to-trigger resource leak when logging credential status.
31893 - Directory mirrors no longer fetch the v1 directory or
31894 running-routers files. They are obsolete, and nobody asks for them
31895 anymore. This is the first step to making v1 authorities obsolete.
31897 o Minor features (controller):
31898 - Return circuit purposes in response to GETINFO circuit-status. Fixes
31902 Changes in version 0.2.0.32 - 2008-11-20
31903 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
31904 packages (and maybe other packages) noticed by Theo de Raadt, fixes
31905 a smaller security flaw that might allow an attacker to access local
31906 services, further improves hidden service performance, and fixes a
31907 variety of other issues.
31910 - The "User" and "Group" config options did not clear the
31911 supplementary group entries for the Tor process. The "User" option
31912 is now more robust, and we now set the groups to the specified
31913 user's primary group. The "Group" option is now ignored. For more
31914 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
31915 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
31916 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
31917 - The "ClientDNSRejectInternalAddresses" config option wasn't being
31918 consistently obeyed: if an exit relay refuses a stream because its
31919 exit policy doesn't allow it, we would remember what IP address
31920 the relay said the destination address resolves to, even if it's
31921 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
31924 - Fix a DOS opportunity during the voting signature collection process
31925 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
31927 o Major bugfixes (hidden services):
31928 - When fetching v0 and v2 rendezvous service descriptors in parallel,
31929 we were failing the whole hidden service request when the v0
31930 descriptor fetch fails, even if the v2 fetch is still pending and
31931 might succeed. Similarly, if the last v2 fetch fails, we were
31932 failing the whole hidden service request even if a v0 fetch is
31933 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
31934 - When extending a circuit to a hidden service directory to upload a
31935 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
31936 requests failed, because the router descriptor has not been
31937 downloaded yet. In these cases, do not attempt to upload the
31938 rendezvous descriptor, but wait until the router descriptor is
31939 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
31940 descriptor from a hidden service directory for which the router
31941 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
31945 - Fix several infrequent memory leaks spotted by Coverity.
31946 - When testing for libevent functions, set the LDFLAGS variable
31947 correctly. Found by Riastradh.
31948 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
31949 bootstrapping with tunneled directory connections. Bugfix on
31950 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
31951 - When asked to connect to A.B.exit:80, if we don't know the IP for A
31952 and we know that server B rejects most-but-not all connections to
31953 port 80, we would previously reject the connection. Now, we assume
31954 the user knows what they were asking for. Fixes bug 752. Bugfix
31955 on 0.0.9rc5. Diagnosed by BarkerJr.
31956 - If we overrun our per-second write limits a little, count this as
31957 having used up our write allocation for the second, and choke
31958 outgoing directory writes. Previously, we had only counted this when
31959 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
31960 Bugfix on 0.2.0.x (??).
31961 - Remove the old v2 directory authority 'lefkada' from the default
31962 list. It has been gone for many months.
31963 - Stop doing unaligned memory access that generated bus errors on
31964 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
31965 - Make USR2 log-level switch take effect immediately. Bugfix on
31968 o Minor bugfixes (controller):
31969 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
31970 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
31973 Changes in version 0.2.1.7-alpha - 2008-11-08
31974 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
31975 packages (and maybe other packages) noticed by Theo de Raadt, fixes
31976 a smaller security flaw that might allow an attacker to access local
31977 services, adds better defense against DNS poisoning attacks on exit
31978 relays, further improves hidden service performance, and fixes a
31979 variety of other issues.
31982 - The "ClientDNSRejectInternalAddresses" config option wasn't being
31983 consistently obeyed: if an exit relay refuses a stream because its
31984 exit policy doesn't allow it, we would remember what IP address
31985 the relay said the destination address resolves to, even if it's
31986 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
31987 - The "User" and "Group" config options did not clear the
31988 supplementary group entries for the Tor process. The "User" option
31989 is now more robust, and we now set the groups to the specified
31990 user's primary group. The "Group" option is now ignored. For more
31991 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
31992 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
31993 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
31994 - Do not use or believe expired v3 authority certificates. Patch
31995 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
31998 - Now NodeFamily and MyFamily config options allow spaces in
31999 identity fingerprints, so it's easier to paste them in.
32000 Suggested by Lucky Green.
32001 - Implement the 0x20 hack to better resist DNS poisoning: set the
32002 case on outgoing DNS requests randomly, and reject responses that do
32003 not match the case correctly. This logic can be disabled with the
32004 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
32005 of servers that do not reliably preserve case in replies. See
32006 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
32008 - Preserve case in replies to DNSPort requests in order to support
32009 the 0x20 hack for resisting DNS poisoning attacks.
32011 o Hidden service performance improvements:
32012 - When the client launches an introduction circuit, retry with a
32013 new circuit after 30 seconds rather than 60 seconds.
32014 - Launch a second client-side introduction circuit in parallel
32015 after a delay of 15 seconds (based on work by Christian Wilms).
32016 - Hidden services start out building five intro circuits rather
32017 than three, and when the first three finish they publish a service
32018 descriptor using those. Now we publish our service descriptor much
32019 faster after restart.
32022 - Minor fix in the warning messages when you're having problems
32023 bootstrapping; also, be more forgiving of bootstrap problems when
32024 we're still making incremental progress on a given bootstrap phase.
32025 - When we're choosing an exit node for a circuit, and we have
32026 no pending streams, choose a good general exit rather than one that
32027 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
32028 - Send a valid END cell back when a client tries to connect to a
32029 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
32030 840. Patch from rovv.
32031 - If a broken client asks a non-exit router to connect somewhere,
32032 do not even do the DNS lookup before rejecting the connection.
32033 Fixes another case of bug 619. Patch from rovv.
32034 - Fix another case of assuming, when a specific exit is requested,
32035 that we know more than the user about what hosts it allows.
32036 Fixes another case of bug 752. Patch from rovv.
32037 - Check which hops rendezvous stream cells are associated with to
32038 prevent possible guess-the-streamid injection attacks from
32039 intermediate hops. Fixes another case of bug 446. Based on patch
32041 - Avoid using a negative right-shift when comparing 32-bit
32042 addresses. Possible fix for bug 845 and bug 811.
32043 - Make the assert_circuit_ok() function work correctly on circuits that
32044 have already been marked for close.
32045 - Fix read-off-the-end-of-string error in unit tests when decoding
32046 introduction points.
32047 - Fix uninitialized size field for memory area allocation: may improve
32048 memory performance during directory parsing.
32049 - Treat duplicate certificate fetches as failures, so that we do
32050 not try to re-fetch an expired certificate over and over and over.
32051 - Do not say we're fetching a certificate when we'll in fact skip it
32052 because of a pending download.
32055 Changes in version 0.2.1.6-alpha - 2008-09-30
32056 Tor 0.2.1.6-alpha further improves performance and robustness of
32057 hidden services, starts work on supporting per-country relay selection,
32058 and fixes a variety of smaller issues.
32061 - Implement proposal 121: make it possible to build hidden services
32062 that only certain clients are allowed to connect to. This is
32063 enforced at several points, so that unauthorized clients are unable
32064 to send INTRODUCE cells to the service, or even (depending on the
32065 type of authentication) to learn introduction points. This feature
32066 raises the bar for certain kinds of active attacks against hidden
32067 services. Code by Karsten Loesing.
32068 - Relays now store and serve v2 hidden service descriptors by default,
32069 i.e., the new default value for HidServDirectoryV2 is 1. This is
32070 the last step in proposal 114, which aims to make hidden service
32071 lookups more reliable.
32072 - Start work to allow node restrictions to include country codes. The
32073 syntax to exclude nodes in a country with country code XX is
32074 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
32075 refinement to decide what config options should take priority if
32076 you ask to both use a particular node and exclude it.
32077 - Allow ExitNodes list to include IP ranges and country codes, just
32078 like the Exclude*Nodes lists. Patch from Robert Hogan.
32081 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
32082 Tor to fail to start if you had it configured to use a bridge
32083 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
32084 - When extending a circuit to a hidden service directory to upload a
32085 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
32086 requests failed, because the router descriptor had not been
32087 downloaded yet. In these cases, we now wait until the router
32088 descriptor is downloaded, and then retry. Likewise, clients
32089 now skip over a hidden service directory if they don't yet have
32090 its router descriptor, rather than futilely requesting it and
32091 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
32093 - When fetching v0 and v2 rendezvous service descriptors in parallel,
32094 we were failing the whole hidden service request when the v0
32095 descriptor fetch fails, even if the v2 fetch is still pending and
32096 might succeed. Similarly, if the last v2 fetch fails, we were
32097 failing the whole hidden service request even if a v0 fetch is
32098 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
32099 - DNS replies need to have names matching their requests, but
32100 these names should be in the questions section, not necessarily
32101 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
32104 - Update to the "September 1 2008" ip-to-country file.
32105 - Allow ports 465 and 587 in the default exit policy again. We had
32106 rejected them in 0.1.0.15, because back in 2005 they were commonly
32107 misconfigured and ended up as spam targets. We hear they are better
32108 locked down these days.
32109 - Use a lockfile to make sure that two Tor processes are not
32110 simultaneously running with the same datadir.
32111 - Serve the latest v3 networkstatus consensus via the control
32112 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
32113 - Better logging about stability/reliability calculations on directory
32115 - Drop the requirement to have an open dir port for storing and
32116 serving v2 hidden service descriptors.
32117 - Directory authorities now serve a /tor/dbg-stability.txt URL to
32118 help debug WFU and MTBF calculations.
32119 - Implement most of Proposal 152: allow specialized servers to permit
32120 single-hop circuits, and clients to use those servers to build
32121 single-hop circuits when using a specialized controller. Patch
32122 from Josh Albrecht. Resolves feature request 768.
32123 - Add a -p option to tor-resolve for specifying the SOCKS port: some
32124 people find host:port too confusing.
32125 - Make TrackHostExit mappings expire a while after their last use, not
32126 after their creation. Patch from Robert Hogan.
32127 - Provide circuit purposes along with circuit events to the controller.
32130 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
32132 - Fixed some memory leaks -- some quite frequent, some almost
32133 impossible to trigger -- based on results from Coverity.
32134 - When testing for libevent functions, set the LDFLAGS variable
32135 correctly. Found by Riastradh.
32136 - Fix an assertion bug in parsing policy-related options; possible fix
32138 - Catch and report a few more bootstrapping failure cases when Tor
32139 fails to establish a TCP connection. Cleanup on 0.2.1.x.
32140 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
32141 bootstrapping with tunneled directory connections. Bugfix on
32142 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
32143 - When asked to connect to A.B.exit:80, if we don't know the IP for A
32144 and we know that server B rejects most-but-not all connections to
32145 port 80, we would previously reject the connection. Now, we assume
32146 the user knows what they were asking for. Fixes bug 752. Bugfix
32147 on 0.0.9rc5. Diagnosed by BarkerJr.
32148 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
32149 service directories if they have no advertised dir port. Bugfix
32151 - If we overrun our per-second write limits a little, count this as
32152 having used up our write allocation for the second, and choke
32153 outgoing directory writes. Previously, we had only counted this when
32154 we had met our limits precisely. Fixes bug 824. Patch by rovv.
32155 Bugfix on 0.2.0.x (??).
32156 - Avoid a "0 divided by 0" calculation when calculating router uptime
32157 at directory authorities. Bugfix on 0.2.0.8-alpha.
32158 - Make DNS resolved controller events into "CLOSED", not
32159 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
32161 - Fix a bug where an unreachable relay would establish enough
32162 reachability testing circuits to do a bandwidth test -- if
32163 we already have a connection to the middle hop of the testing
32164 circuit, then it could establish the last hop by using the existing
32165 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
32166 circuits no longer use entry guards in 0.2.1.3-alpha.
32167 - If we have correct permissions on $datadir, we complain to stdout
32168 and fail to start. But dangerous permissions on
32169 $datadir/cached-status/ would cause us to open a log and complain
32170 there. Now complain to stdout and fail to start in both cases. Fixes
32171 bug 820, reported by seeess.
32172 - Remove the old v2 directory authority 'lefkada' from the default
32173 list. It has been gone for many months.
32175 o Code simplifications and refactoring:
32176 - Revise the connection_new functions so that a more typesafe variant
32177 exists. This will work better with Coverity, and let us find any
32178 actual mistakes we're making here.
32179 - Refactor unit testing logic so that dmalloc can be used sensibly
32180 with unit tests to check for memory leaks.
32181 - Move all hidden-service related fields from connection and circuit
32182 structure to substructures: this way they won't eat so much memory.
32185 Changes in version 0.2.0.31 - 2008-09-03
32186 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
32187 a big bug we're seeing where in rare cases traffic from one Tor stream
32188 gets mixed into another stream, and fixes a variety of smaller issues.
32191 - Make sure that two circuits can never exist on the same connection
32192 with the same circuit ID, even if one is marked for close. This
32193 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
32194 - Relays now reject risky extend cells: if the extend cell includes
32195 a digest of all zeroes, or asks to extend back to the relay that
32196 sent the extend cell, tear down the circuit. Ideas suggested
32198 - If not enough of our entry guards are available so we add a new
32199 one, we might use the new one even if it overlapped with the
32200 current circuit's exit relay (or its family). Anonymity bugfix
32201 pointed out by rovv.
32204 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
32205 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
32206 - Correctly detect the presence of the linux/netfilter_ipv4.h header
32207 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
32208 - Pick size of default geoip filename string correctly on windows.
32209 Fixes bug 806. Bugfix on 0.2.0.30.
32210 - Make the autoconf script accept the obsolete --with-ssl-dir
32211 option as an alias for the actually-working --with-openssl-dir
32212 option. Fix the help documentation to recommend --with-openssl-dir.
32213 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
32214 - When using the TransPort option on OpenBSD, and using the User
32215 option to change UID and drop privileges, make sure to open
32216 /dev/pf before dropping privileges. Fixes bug 782. Patch from
32217 Christopher Davis. Bugfix on 0.1.2.1-alpha.
32218 - Try to attach connections immediately upon receiving a RENDEZVOUS2
32219 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
32220 on the client side when connecting to a hidden service. Bugfix
32221 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
32222 - When closing an application-side connection because its circuit is
32223 getting torn down, generate the stream event correctly. Bugfix on
32224 0.1.2.x. Anonymous patch.
32227 Changes in version 0.2.1.5-alpha - 2008-08-31
32228 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
32229 in a lot of the infrastructure for adding authorization to hidden
32230 services, lays the groundwork for having clients read their load
32231 balancing information out of the networkstatus consensus rather than
32232 the individual router descriptors, addresses two potential anonymity
32233 issues, and fixes a variety of smaller issues.
32236 - Convert many internal address representations to optionally hold
32238 - Generate and accept IPv6 addresses in many protocol elements.
32239 - Make resolver code handle nameservers located at ipv6 addresses.
32240 - Begin implementation of proposal 121 ("Client authorization for
32241 hidden services"): configure hidden services with client
32242 authorization, publish descriptors for them, and configure
32243 authorization data for hidden services at clients. The next
32244 step is to actually access hidden services that perform client
32246 - More progress toward proposal 141: Network status consensus
32247 documents and votes now contain bandwidth information for each
32248 router and a summary of that router's exit policy. Eventually this
32249 will be used by clients so that they do not have to download every
32250 known descriptor before building circuits.
32252 o Major bugfixes (on 0.2.0.x and before):
32253 - When sending CREATED cells back for a given circuit, use a 64-bit
32254 connection ID to find the right connection, rather than an addr:port
32255 combination. Now that we can have multiple OR connections between
32256 the same ORs, it is no longer possible to use addr:port to uniquely
32257 identify a connection.
32258 - Relays now reject risky extend cells: if the extend cell includes
32259 a digest of all zeroes, or asks to extend back to the relay that
32260 sent the extend cell, tear down the circuit. Ideas suggested
32262 - If not enough of our entry guards are available so we add a new
32263 one, we might use the new one even if it overlapped with the
32264 current circuit's exit relay (or its family). Anonymity bugfix
32265 pointed out by rovv.
32268 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
32269 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
32270 - When using the TransPort option on OpenBSD, and using the User
32271 option to change UID and drop privileges, make sure to open /dev/pf
32272 before dropping privileges. Fixes bug 782. Patch from Christopher
32273 Davis. Bugfix on 0.1.2.1-alpha.
32274 - Correctly detect the presence of the linux/netfilter_ipv4.h header
32275 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
32276 - Add a missing safe_str() call for a debug log message.
32277 - Use 64 bits instead of 32 bits for connection identifiers used with
32278 the controller protocol, to greatly reduce risk of identifier reuse.
32279 - Make the autoconf script accept the obsolete --with-ssl-dir
32280 option as an alias for the actually-working --with-openssl-dir
32281 option. Fix the help documentation to recommend --with-openssl-dir.
32282 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
32285 - Rate-limit too-many-sockets messages: when they happen, they happen
32286 a lot. Resolves bug 748.
32287 - Resist DNS poisoning a little better by making sure that names in
32288 answer sections match.
32289 - Print the SOCKS5 error message string as well as the error code
32290 when a tor-resolve request fails. Patch from Jacob.
32293 Changes in version 0.2.1.4-alpha - 2008-08-04
32294 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
32297 - The address part of exit policies was not correctly written
32298 to router descriptors. This generated router descriptors that failed
32299 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
32301 - Tor triggered a false assert when extending a circuit to a relay
32302 but we already have a connection open to that relay. Noticed by
32303 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
32306 - Fix a hidden service logging bug: in some edge cases, the router
32307 descriptor of a previously picked introduction point becomes
32308 obsolete and we need to give up on it rather than continually
32309 complaining that it has become obsolete. Observed by xiando. Bugfix
32312 o Removed features:
32313 - Take out the TestVia config option, since it was a workaround for
32314 a bug that was fixed in Tor 0.1.1.21.
32317 Changes in version 0.2.1.3-alpha - 2008-08-03
32318 Tor 0.2.1.3-alpha implements most of the pieces to prevent
32319 infinite-length circuit attacks (see proposal 110); fixes a bug that
32320 might cause exit relays to corrupt streams they send back; allows
32321 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
32322 ExcludeExitNodes config options; and fixes a big pile of bugs.
32324 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
32325 - Send a bootstrap problem "warn" event on the first problem if the
32326 reason is NO_ROUTE (that is, our network is down).
32329 - Implement most of proposal 110: The first K cells to be sent
32330 along a circuit are marked as special "early" cells; only K "early"
32331 cells will be allowed. Once this code is universal, we can block
32332 certain kinds of DOS attack by requiring that EXTEND commands must
32333 be sent using an "early" cell.
32336 - Try to attach connections immediately upon receiving a RENDEZVOUS2
32337 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
32338 on the client side when connecting to a hidden service. Bugfix
32339 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
32340 - Ensure that two circuits can never exist on the same connection
32341 with the same circuit ID, even if one is marked for close. This
32342 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
32345 - When relays do their initial bandwidth measurement, don't limit
32346 to just our entry guards for the test circuits. Otherwise we tend
32347 to have multiple test circuits going through a single entry guard,
32348 which makes our bandwidth test less accurate. Fixes part of bug 654;
32349 patch contributed by Josh Albrecht.
32350 - Add an ExcludeExitNodes option so users can list a set of nodes
32351 that should be be excluded from the exit node position, but
32352 allowed elsewhere. Implements proposal 151.
32353 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
32354 ExcludeNodes and ExcludeExitNodes lists.
32355 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
32356 be more efficient. Formerly it was quadratic in the number of
32357 servers; now it should be linear. Fixes bug 509.
32358 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
32359 and n_conn_id_digest fields into a separate structure that's
32360 only needed when the circuit has not yet attached to an n_conn.
32363 - Change the contrib/tor.logrotate script so it makes the new
32364 logs as "_tor:_tor" rather than the default, which is generally
32365 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
32366 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
32367 warnings (occasionally), but it can also cause the compiler to
32368 eliminate error-checking code. Suggested by Peter Gutmann.
32369 - When a hidden service is giving up on an introduction point candidate
32370 that was not included in the last published rendezvous descriptor,
32371 don't reschedule publication of the next descriptor. Fixes bug 763.
32373 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
32374 HiddenServiceExcludeNodes as obsolete: they never worked properly,
32375 and nobody claims to be using them. Fixes bug 754. Bugfix on
32376 0.1.0.1-rc. Patch from Christian Wilms.
32377 - Fix a small alignment and memory-wasting bug on buffer chunks.
32380 o Minor bugfixes (controller):
32381 - When closing an application-side connection because its circuit
32382 is getting torn down, generate the stream event correctly.
32383 Bugfix on 0.1.2.x. Anonymous patch.
32385 o Removed features:
32386 - Remove all backward-compatibility code to support relays running
32387 versions of Tor so old that they no longer work at all on the
32391 Changes in version 0.2.0.30 - 2008-07-15
32393 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
32394 warnings (occasionally), but it can also cause the compiler to
32395 eliminate error-checking code. Suggested by Peter Gutmann.
32398 Changes in version 0.2.0.29-rc - 2008-07-08
32399 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
32400 hidden-service performance bugs, and fixes a bunch of smaller bugs.
32403 - If you have more than one bridge but don't know their keys,
32404 you would only launch a request for the descriptor of the first one
32405 on your list. (Tor considered launching requests for the others, but
32406 found that it already had a connection on the way for $0000...0000
32407 so it didn't open another.) Bugfix on 0.2.0.x.
32408 - If you have more than one bridge but don't know their keys, and the
32409 connection to one of the bridges failed, you would cancel all
32410 pending bridge connections. (After all, they all have the same
32411 digest.) Bugfix on 0.2.0.x.
32412 - When a hidden service was trying to establish an introduction point,
32413 and Tor had built circuits preemptively for such purposes, we
32414 were ignoring all the preemptive circuits and launching a new one
32415 instead. Bugfix on 0.2.0.14-alpha.
32416 - When a hidden service was trying to establish an introduction point,
32417 and Tor *did* manage to reuse one of the preemptively built
32418 circuits, it didn't correctly remember which one it used,
32419 so it asked for another one soon after, until there were no
32420 more preemptive circuits, at which point it launched one from
32421 scratch. Bugfix on 0.0.9.x.
32422 - Make directory servers include the X-Your-Address-Is: http header in
32423 their responses even for begin_dir conns. Now clients who only
32424 ever use begin_dir connections still have a way to learn their IP
32425 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
32428 - Fix a macro/CPP interaction that was confusing some compilers:
32429 some GCCs don't like #if/#endif pairs inside macro arguments.
32431 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
32432 Fixes bug 704; fix from Steven Murdoch.
32433 - When opening /dev/null in finish_daemonize(), do not pass the
32434 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
32435 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
32436 - Correctly detect transparent proxy support on Linux hosts that
32437 require in.h to be included before netfilter_ipv4.h. Patch
32439 - Disallow session resumption attempts during the renegotiation
32440 stage of the v2 handshake protocol. Clients should never be trying
32441 session resumption at this point, but apparently some did, in
32442 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
32443 found by Geoff Goodell.
32446 Changes in version 0.2.1.2-alpha - 2008-06-20
32447 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
32448 make it easier to set up your own private Tor network; fixes several
32449 big bugs with using more than one bridge relay; fixes a big bug with
32450 offering hidden services quickly after Tor starts; and uses a better
32451 API for reporting potential bootstrapping problems to the controller.
32454 - New TestingTorNetwork config option to allow adjustment of
32455 previously constant values that, while reasonable, could slow
32456 bootstrapping. Implements proposal 135. Patch from Karsten.
32459 - If you have more than one bridge but don't know their digests,
32460 you would only learn a request for the descriptor of the first one
32461 on your list. (Tor considered launching requests for the others, but
32462 found that it already had a connection on the way for $0000...0000
32463 so it didn't open another.) Bugfix on 0.2.0.x.
32464 - If you have more than one bridge but don't know their digests,
32465 and the connection to one of the bridges failed, you would cancel
32466 all pending bridge connections. (After all, they all have the
32467 same digest.) Bugfix on 0.2.0.x.
32468 - When establishing a hidden service, introduction points that
32469 originate from cannibalized circuits are completely ignored and not
32470 included in rendezvous service descriptors. This might be another
32471 reason for delay in making a hidden service available. Bugfix
32472 from long ago (0.0.9.x?)
32475 - Allow OpenSSL to use dynamic locks if it wants.
32476 - When building a consensus, do not include routers that are down.
32477 This will cut down 30% to 40% on consensus size. Implements
32479 - In directory authorities' approved-routers files, allow
32480 fingerprints with or without space.
32481 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
32482 controller can query our current bootstrap state in case it attaches
32483 partway through and wants to catch up.
32484 - Send an initial "Starting" bootstrap status event, so we have a
32485 state to start out in.
32488 - Asking for a conditional consensus at .../consensus/<fingerprints>
32489 would crash a dirserver if it did not already have a
32490 consensus. Bugfix on 0.2.1.1-alpha.
32491 - Clean up some macro/CPP interactions: some GCC versions don't like
32492 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
32495 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
32496 - Directory authorities shouldn't complain about bootstrapping
32497 problems just because they do a lot of reachability testing and
32498 some of the connection attempts fail.
32499 - Start sending "count" and "recommendation" key/value pairs in
32500 bootstrap problem status events, so the controller can hear about
32501 problems even before Tor decides they're worth reporting for sure.
32502 - If you're using bridges, generate "bootstrap problem" warnings
32503 as soon as you run out of working bridges, rather than waiting
32504 for ten failures -- which will never happen if you have less than
32506 - If we close our OR connection because there's been a circuit
32507 pending on it for too long, we were telling our bootstrap status
32508 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
32511 Changes in version 0.2.1.1-alpha - 2008-06-13
32512 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
32513 were making the Tor process bloat especially on Linux; makes our TLS
32514 handshake blend in better; sends "bootstrap phase" status events to
32515 the controller, so it can keep the user informed of progress (and
32516 problems) fetching directory information and establishing circuits;
32517 and adds a variety of smaller features.
32520 - More work on making our TLS handshake blend in: modify the list
32521 of ciphers advertised by OpenSSL in client mode to even more
32522 closely resemble a common web browser. We cheat a little so that
32523 we can advertise ciphers that the locally installed OpenSSL doesn't
32525 - Start sending "bootstrap phase" status events to the controller,
32526 so it can keep the user informed of progress fetching directory
32527 information and establishing circuits. Also inform the controller
32528 if we think we're stuck at a particular bootstrap phase. Implements
32530 - Resume using OpenSSL's RAND_poll() for better (and more portable)
32531 cross-platform entropy collection again. We used to use it, then
32532 stopped using it because of a bug that could crash systems that
32533 called RAND_poll when they had a lot of fds open. It looks like the
32534 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
32535 at startup, and to call RAND_poll() when we reseed later only if
32536 we have a non-buggy OpenSSL version.
32539 - When we choose to abandon a new entry guard because we think our
32540 older ones might be better, close any circuits pending on that
32541 new entry guard connection. This fix should make us recover much
32542 faster when our network is down and then comes back. Bugfix on
32543 0.1.2.8-beta; found by lodger.
32545 o Memory fixes and improvements:
32546 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
32547 to avoid unused RAM in buffer chunks and memory pools.
32548 - Speed up parsing and cut down on memory fragmentation by using
32549 stack-style allocations for parsing directory objects. Previously,
32550 this accounted for over 40% of allocations from within Tor's code
32551 on a typical directory cache.
32552 - Use a Bloom filter rather than a digest-based set to track which
32553 descriptors we need to keep around when we're cleaning out old
32554 router descriptors. This speeds up the computation significantly,
32555 and may reduce fragmentation.
32556 - Reduce the default smartlist size from 32 to 16; it turns out that
32557 most smartlists hold around 8-12 elements tops.
32558 - Make dumpstats() log the fullness and size of openssl-internal
32560 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
32561 patch to their OpenSSL, turn it on to save memory on servers. This
32562 patch will (with any luck) get included in a mainline distribution
32564 - Never use OpenSSL compression: it wastes RAM and CPU trying to
32565 compress cells, which are basically all encrypted, compressed,
32569 - Stop reloading the router list from disk for no reason when we
32570 run out of reachable directory mirrors. Once upon a time reloading
32571 it would set the 'is_running' flag back to 1 for them. It hasn't
32572 done that for a long time.
32573 - In very rare situations new hidden service descriptors were
32574 published earlier than 30 seconds after the last change to the
32575 service. (We currently think that a hidden service descriptor
32576 that's been stable for 30 seconds is worth publishing.)
32579 - Allow separate log levels to be configured for different logging
32580 domains. For example, this allows one to log all notices, warnings,
32581 or errors, plus all memory management messages of level debug or
32582 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
32583 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
32584 and stop using a warning that had become unfixably verbose under
32586 - New --hush command-line option similar to --quiet. While --quiet
32587 disables all logging to the console on startup, --hush limits the
32588 output to messages of warning and error severity.
32589 - Servers support a new URL scheme for consensus downloads that
32590 allows the client to specify which authorities are trusted.
32591 The server then only sends the consensus if the client will trust
32592 it. Otherwise a 404 error is sent back. Clients use this
32593 new scheme when the server supports it (meaning it's running
32594 0.2.1.1-alpha or later). Implements proposal 134.
32595 - New configure/torrc options (--enable-geoip-stats,
32596 DirRecordUsageByCountry) to record how many IPs we've served
32597 directory info to in each country code, how many status documents
32598 total we've sent to each country code, and what share of the total
32599 directory requests we should expect to see.
32600 - Use the TLS1 hostname extension to more closely resemble browser
32602 - Lots of new unit tests.
32603 - Add a macro to implement the common pattern of iterating through
32604 two parallel lists in lockstep.
32607 Changes in version 0.2.0.28-rc - 2008-06-13
32608 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
32609 performance bug, and fixes a bunch of smaller bugs.
32612 - Fix a bug where, when we were choosing the 'end stream reason' to
32613 put in our relay end cell that we send to the exit relay, Tor
32614 clients on Windows were sometimes sending the wrong 'reason'. The
32615 anonymity problem is that exit relays may be able to guess whether
32616 the client is running Windows, thus helping partition the anonymity
32617 set. Down the road we should stop sending reasons to exit relays,
32618 or otherwise prevent future versions of this bug.
32621 - While setting up a hidden service, some valid introduction circuits
32622 were overlooked and abandoned. This might be the reason for
32623 the long delay in making a hidden service available. Bugfix on
32627 - Update to the "June 9 2008" ip-to-country file.
32628 - Run 'make test' as part of 'make dist', so we stop releasing so
32629 many development snapshots that fail their unit tests.
32632 - When we're checking if we have enough dir info for each relay
32633 to begin establishing circuits, make sure that we actually have
32634 the descriptor listed in the consensus, not just any descriptor.
32636 - Bridge relays no longer print "xx=0" in their extrainfo document
32637 for every single country code in the geoip db. Bugfix on
32639 - Only warn when we fail to load the geoip file if we were planning to
32640 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
32641 - If we change our MaxAdvertisedBandwidth and then reload torrc,
32642 Tor won't realize it should publish a new relay descriptor. Fixes
32643 bug 688, reported by mfr. Bugfix on 0.1.2.x.
32644 - When we haven't had any application requests lately, don't bother
32645 logging that we have expired a bunch of descriptors. Bugfix
32647 - Make relay cells written on a connection count as non-padding when
32648 tracking how long a connection has been in use. Bugfix on
32649 0.2.0.1-alpha. Spotted by lodger.
32650 - Fix unit tests in 0.2.0.27-rc.
32651 - Fix compile on Windows.
32654 Changes in version 0.2.0.27-rc - 2008-06-03
32655 Tor 0.2.0.27-rc adds a few features we left out of the earlier
32656 release candidates. In particular, we now include an IP-to-country
32657 GeoIP database, so controllers can easily look up what country a
32658 given relay is in, and so bridge relays can give us some sanitized
32659 summaries about which countries are making use of bridges. (See proposal
32660 126-geoip-fetching.txt for details.)
32663 - Include an IP-to-country GeoIP file in the tarball, so bridge
32664 relays can report sanitized summaries of the usage they're seeing.
32667 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
32668 Robert Hogan. Fixes the first part of bug 681.
32669 - Make bridge authorities never serve extrainfo docs.
32670 - Add support to detect Libevent versions in the 1.4.x series
32672 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
32673 - Include a new contrib/tor-exit-notice.html file that exit relay
32674 operators can put on their website to help reduce abuse queries.
32677 - When tunneling an encrypted directory connection, and its first
32678 circuit fails, do not leave it unattached and ask the controller
32679 to deal. Fixes the second part of bug 681.
32680 - Make bridge authorities correctly expire old extrainfo documents
32684 Changes in version 0.2.0.26-rc - 2008-05-13
32685 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
32686 in Debian's OpenSSL packages. All users running any 0.2.0.x version
32687 should upgrade, whether they're running Debian or not.
32689 o Major security fixes:
32690 - Use new V3 directory authority keys on the tor26, gabelmoo, and
32691 moria1 V3 directory authorities. The old keys were generated with
32692 a vulnerable version of Debian's OpenSSL package, and must be
32693 considered compromised. Other authorities' keys were not generated
32694 with an affected version of OpenSSL.
32697 - List authority signatures as "unrecognized" based on DirServer
32698 lines, not on cert cache. Bugfix on 0.2.0.x.
32701 - Add a new V3AuthUseLegacyKey option to make it easier for
32702 authorities to change their identity keys if they have to.
32705 Changes in version 0.2.0.25-rc - 2008-04-23
32706 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
32709 - Remember to initialize threading before initializing logging.
32710 Otherwise, many BSD-family implementations will crash hard on
32711 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
32714 - Authorities correctly free policies on bad servers on
32715 exit. Fixes bug 672. Bugfix on 0.2.0.x.
32718 Changes in version 0.2.0.24-rc - 2008-04-22
32719 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
32720 v3 directory authority, makes relays with dynamic IP addresses and no
32721 DirPort notice more quickly when their IP address changes, fixes a few
32722 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
32724 o New directory authorities:
32725 - Take lefkada out of the list of v3 directory authorities, since
32726 it has been down for months.
32727 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
32731 - Detect address changes more quickly on non-directory mirror
32732 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
32734 o Minor features (security):
32735 - Reject requests for reverse-dns lookup of names that are in
32736 a private address space. Patch from lodger.
32737 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
32740 o Minor bugfixes (crashes):
32741 - Avoid a rare assert that can trigger when Tor doesn't have much
32742 directory information yet and it tries to fetch a v2 hidden
32743 service descriptor. Fixes bug 651, reported by nwf.
32744 - Initialize log mutex before initializing dmalloc. Otherwise,
32745 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
32746 - Use recursive pthread mutexes in order to avoid deadlock when
32747 logging debug-level messages to a controller. Bug spotted by nwf,
32748 bugfix on 0.2.0.16-alpha.
32750 o Minor bugfixes (resource management):
32751 - Keep address policies from leaking memory: start their refcount
32752 at 1, not 2. Bugfix on 0.2.0.16-alpha.
32753 - Free authority certificates on exit, so they don't look like memory
32754 leaks. Bugfix on 0.2.0.19-alpha.
32755 - Free static hashtables for policy maps and for TLS connections on
32756 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
32757 - Avoid allocating extra space when computing consensuses on 64-bit
32758 platforms. Bug spotted by aakova.
32760 o Minor bugfixes (misc):
32761 - Do not read the configuration file when we've only been told to
32762 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
32763 based on patch from Sebastian Hahn.
32764 - Exit relays that are used as a client can now reach themselves
32765 using the .exit notation, rather than just launching an infinite
32766 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
32767 - When attempting to open a logfile fails, tell us why.
32768 - Fix a dumb bug that was preventing us from knowing that we should
32769 preemptively build circuits to handle expected directory requests.
32770 Fixes bug 660. Bugfix on 0.1.2.x.
32771 - Warn less verbosely about clock skew from netinfo cells from
32772 untrusted sources. Fixes bug 663.
32773 - Make controller stream events for DNS requests more consistent,
32774 by adding "new stream" events for DNS requests, and removing
32775 spurious "stream closed" events" for cached reverse resolves.
32776 Patch from mwenge. Fixes bug 646.
32777 - Correctly notify one-hop connections when a circuit build has
32778 failed. Possible fix for bug 669. Found by lodger.
32781 Changes in version 0.2.0.23-rc - 2008-03-24
32782 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
32783 makes bootstrapping faster if the first directory mirror you contact
32784 is down. The bundles also include the new Vidalia 0.1.2 release.
32787 - When a tunneled directory request is made to a directory server
32788 that's down, notice after 30 seconds rather than 120 seconds. Also,
32789 fail any begindir streams that are pending on it, so they can
32790 retry elsewhere. This was causing multi-minute delays on bootstrap.
32793 Changes in version 0.2.0.22-rc - 2008-03-18
32794 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
32795 enables encrypted directory connections by default for non-relays, fixes
32796 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
32797 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
32800 - Enable encrypted directory connections by default for non-relays,
32801 so censor tools that block Tor directory connections based on their
32802 plaintext patterns will no longer work. This means Tor works in
32803 certain censored countries by default again.
32806 - Make sure servers always request certificates from clients during
32807 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
32808 - Do not enter a CPU-eating loop when a connection is closed in
32809 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
32810 diagnosed by lodger; bugfix on 0.2.0.20-rc.
32811 - Fix assertion failure that could occur when a blocked circuit
32812 became unblocked, and it had pending client DNS requests. Bugfix
32813 on 0.2.0.1-alpha. Fixes bug 632.
32815 o Minor bugfixes (on 0.1.2.x):
32816 - Generate "STATUS_SERVER" events rather than misspelled
32817 "STATUS_SEVER" events. Caught by mwenge.
32818 - When counting the number of bytes written on a TLS connection,
32819 look at the BIO actually used for writing to the network, not
32820 at the BIO used (sometimes) to buffer data for the network.
32821 Looking at different BIOs could result in write counts on the
32822 order of ULONG_MAX. Fixes bug 614.
32823 - On Windows, correctly detect errors when listing the contents of
32824 a directory. Fix from lodger.
32826 o Minor bugfixes (on 0.2.0.x):
32827 - Downgrade "sslv3 alert handshake failure" message to INFO.
32828 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
32829 left BandwidthRate and BandwidthBurst at the default, we would be
32830 silently limited by those defaults. Now raise them to match the
32831 RelayBandwidth* values.
32832 - Fix the SVK version detection logic to work correctly on a branch.
32833 - Make --enable-openbsd-malloc work correctly on Linux with alpha
32834 CPUs. Fixes bug 625.
32835 - Logging functions now check that the passed severity is sane.
32836 - Use proper log levels in the testsuite call of
32837 get_interface_address6().
32838 - When using a nonstandard malloc, do not use the platform values for
32839 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
32840 - Make the openbsd malloc code use 8k pages on alpha CPUs and
32842 - Detect mismatched page sizes when using --enable-openbsd-malloc.
32843 - Avoid double-marked-for-close warning when certain kinds of invalid
32844 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
32845 for bug 617. Bugfix on 0.2.0.1-alpha.
32846 - Make sure that the "NULL-means-reject *:*" convention is followed by
32847 all the policy manipulation functions, avoiding some possible crash
32848 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
32849 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
32850 actually works, and doesn't warn about every single reverse lookup.
32851 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
32854 - Only log guard node status when guard node status has changed.
32855 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
32856 make "INFO" 75% less verbose.
32859 Changes in version 0.2.0.21-rc - 2008-03-02
32860 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
32861 makes Tor work well with Vidalia again, fixes a rare assert bug,
32862 and fixes a pair of more minor bugs. The bundles also include Vidalia
32863 0.1.0 and Torbutton 1.1.16.
32866 - The control port should declare that it requires password auth
32867 when HashedControlSessionPassword is set too. Patch from Matt Edman;
32868 bugfix on 0.2.0.20-rc. Fixes bug 615.
32869 - Downgrade assert in connection_buckets_decrement() to a log message.
32870 This may help us solve bug 614, and in any case will make its
32871 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
32872 - We were sometimes miscounting the number of bytes read from the
32873 network, causing our rate limiting to not be followed exactly.
32874 Bugfix on 0.2.0.16-alpha. Reported by lodger.
32877 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
32878 OpenSSL versions should have been working fine. Diagnosis and patch
32879 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
32880 Bugfix on 0.2.0.20-rc.
32883 Changes in version 0.2.0.20-rc - 2008-02-24
32884 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
32885 makes more progress towards normalizing Tor's TLS handshake, makes
32886 hidden services work better again, helps relays bootstrap if they don't
32887 know their IP address, adds optional support for linking in openbsd's
32888 allocator or tcmalloc, allows really fast relays to scale past 15000
32889 sockets, and fixes a bunch of minor bugs reported by Veracode.
32892 - Enable the revised TLS handshake based on the one designed by
32893 Steven Murdoch in proposal 124, as revised in proposal 130. It
32894 includes version negotiation for OR connections as described in
32895 proposal 105. The new handshake is meant to be harder for censors
32896 to fingerprint, and it adds the ability to detect certain kinds of
32897 man-in-the-middle traffic analysis attacks. The version negotiation
32898 feature will allow us to improve Tor's link protocol more safely
32900 - Choose which bridge to use proportional to its advertised bandwidth,
32901 rather than uniformly at random. This should speed up Tor for
32902 bridge users. Also do this for people who set StrictEntryNodes.
32903 - When a TrackHostExits-chosen exit fails too many times in a row,
32904 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
32907 - Resolved problems with (re-)fetching hidden service descriptors.
32908 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
32909 and 0.2.0.19-alpha.
32910 - If we only ever used Tor for hidden service lookups or posts, we
32911 would stop building circuits and start refusing connections after
32912 24 hours, since we falsely believed that Tor was dormant. Reported
32913 by nwf; bugfix on 0.1.2.x.
32914 - Servers that don't know their own IP address should go to the
32915 authorities for their first directory fetch, even if their DirPort
32916 is off or if they don't know they're reachable yet. This will help
32917 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
32918 - When counting the number of open sockets, count not only the number
32919 of sockets we have received from the socket() call, but also
32920 the number we've gotten from accept() and socketpair(). This bug
32921 made us fail to count all sockets that we were using for incoming
32922 connections. Bugfix on 0.2.0.x.
32923 - Fix code used to find strings within buffers, when those strings
32924 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
32925 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
32926 - Add a new __HashedControlSessionPassword option for controllers
32927 to use for one-off session password hashes that shouldn't get
32928 saved to disk by SAVECONF --- Vidalia users were accumulating a
32929 pile of HashedControlPassword lines in their torrc files, one for
32930 each time they had restarted Tor and then clicked Save. Make Tor
32931 automatically convert "HashedControlPassword" to this new option but
32932 only when it's given on the command line. Partial fix for bug 586.
32934 o Minor features (performance):
32935 - Tune parameters for cell pool allocation to minimize amount of
32937 - Add OpenBSD malloc code from phk as an optional malloc
32938 replacement on Linux: some glibc libraries do very poorly
32939 with Tor's memory allocation patterns. Pass
32940 --enable-openbsd-malloc to get the replacement malloc code.
32941 - Add a --with-tcmalloc option to the configure script to link
32942 against tcmalloc (if present). Does not yet search for
32943 non-system include paths.
32944 - Stop imposing an arbitrary maximum on the number of file descriptors
32945 used for busy servers. Bug reported by Olaf Selke; patch from
32948 o Minor features (other):
32949 - When SafeLogging is disabled, log addresses along with all TLS
32951 - When building with --enable-gcc-warnings, check for whether Apple's
32952 warning "-Wshorten-64-to-32" is available.
32953 - Add a --passphrase-fd argument to the tor-gencert command for
32956 o Minor bugfixes (memory leaks and code problems):
32957 - We were leaking a file descriptor if Tor started with a zero-length
32958 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
32959 - Detect size overflow in zlib code. Reported by Justin Ferguson and
32961 - We were comparing the raw BridgePassword entry with a base64'ed
32962 version of it, when handling a "/tor/networkstatus-bridges"
32963 directory request. Now compare correctly. Noticed by Veracode.
32964 - Recover from bad tracked-since value in MTBF-history file.
32965 Should fix bug 537.
32966 - Alter the code that tries to recover from unhandled write
32967 errors, to not try to flush onto a socket that's given us
32968 unhandled errors. Bugfix on 0.1.2.x.
32969 - Make Unix controlsockets work correctly on OpenBSD. Patch from
32970 tup. Bugfix on 0.2.0.3-alpha.
32972 o Minor bugfixes (other):
32973 - If we have an extra-info document for our server, always make
32974 it available on the control port, even if we haven't gotten
32975 a copy of it from an authority yet. Patch from mwenge.
32976 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
32977 - Directory mirrors no longer include a guess at the client's IP
32978 address if the connection appears to be coming from the same /24
32979 network; it was producing too many wrong guesses.
32980 - Make the new hidden service code respect the SafeLogging setting.
32981 Bugfix on 0.2.0.x. Patch from Karsten.
32982 - When starting as an authority, do not overwrite all certificates
32983 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
32984 - If we're trying to flush the last bytes on a connection (for
32985 example, when answering a directory request), reset the
32986 time-to-give-up timeout every time we manage to write something
32987 on the socket. Bugfix on 0.1.2.x.
32988 - Change the behavior of "getinfo status/good-server-descriptor"
32989 so it doesn't return failure when any authority disappears.
32990 - Even though the man page said that "TrackHostExits ." should
32991 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
32992 - Report TLS "zero return" case as a "clean close" and "IO error"
32993 as a "close". Stop calling closes "unexpected closes": existing
32994 Tors don't use SSL_close(), so having a connection close without
32995 the TLS shutdown handshake is hardly unexpected.
32996 - Send NAMESERVER_STATUS messages for a single failed nameserver
32999 o Code simplifications and refactoring:
33000 - Remove the tor_strpartition function: its logic was confused,
33001 and it was only used for one thing that could be implemented far
33005 Changes in version 0.2.0.19-alpha - 2008-02-09
33006 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
33007 handshake, makes path selection for relays more secure and IP address
33008 guessing more robust, and generally fixes a lot of bugs in preparation
33009 for calling the 0.2.0 branch stable.
33012 - Do not include recognizeable strings in the commonname part of
33013 Tor's x509 certificates.
33016 - If we're a relay, avoid picking ourselves as an introduction point,
33017 a rendezvous point, or as the final hop for internal circuits. Bug
33018 reported by taranis and lodger. Bugfix on 0.1.2.x.
33019 - Patch from "Andrew S. Lists" to catch when we contact a directory
33020 mirror at IP address X and he says we look like we're coming from
33021 IP address X. Bugfix on 0.1.2.x.
33023 o Minor features (security):
33024 - Be more paranoid about overwriting sensitive memory on free(),
33025 as a defensive programming tactic to ensure forward secrecy.
33027 o Minor features (directory authority):
33028 - Actually validate the options passed to AuthDirReject,
33029 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
33030 - Reject router descriptors with out-of-range bandwidthcapacity or
33031 bandwidthburst values.
33033 o Minor features (controller):
33034 - Reject controller commands over 1MB in length. This keeps rogue
33035 processes from running us out of memory.
33037 o Minor features (misc):
33038 - Give more descriptive well-formedness errors for out-of-range
33039 hidden service descriptor/protocol versions.
33040 - Make memory debugging information describe more about history
33041 of cell allocation, so we can help reduce our memory use.
33043 o Deprecated features (controller):
33044 - The status/version/num-versioning and status/version/num-concurring
33045 GETINFO options are no longer useful in the v3 directory protocol:
33046 treat them as deprecated, and warn when they're used.
33049 - When our consensus networkstatus has been expired for a while, stop
33050 being willing to build circuits using it. Fixes bug 401. Bugfix
33052 - Directory caches now fetch certificates from all authorities
33053 listed in a networkstatus consensus, even when they do not
33054 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
33055 - When connecting to a bridge without specifying its key, insert
33056 the connection into the identity-to-connection map as soon as
33057 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
33058 - Detect versions of OS X where malloc_good_size() is present in the
33059 library but never actually declared. Resolves bug 587. Bugfix
33061 - Stop incorrectly truncating zlib responses to directory authority
33062 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
33063 - Stop recommending that every server operator send mail to tor-ops.
33064 Resolves bug 597. Bugfix on 0.1.2.x.
33065 - Don't trigger an assert if we start a directory authority with a
33066 private IP address (like 127.0.0.1).
33067 - Avoid possible failures when generating a directory with routers
33068 with over-long versions strings, or too many flags set. Bugfix
33070 - If an attempt to launch a DNS resolve request over the control
33071 port fails because we have overrun the limit on the number of
33072 connections, tell the controller that the request has failed.
33073 - Avoid using too little bandwidth when our clock skips a few
33074 seconds. Bugfix on 0.1.2.x.
33075 - Fix shell error when warning about missing packages in configure
33076 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
33077 - Do not become confused when receiving a spurious VERSIONS-like
33078 cell from a confused v1 client. Bugfix on 0.2.0.x.
33079 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
33080 introduction points for a hidden service have failed. Patch from
33081 Karsten Loesing. Bugfix on 0.2.0.x.
33083 o Code simplifications and refactoring:
33084 - Remove some needless generality from cpuworker code, for improved
33086 - Stop overloading the circuit_t.onionskin field for both "onionskin
33087 from a CREATE cell that we are waiting for a cpuworker to be
33088 assigned" and "onionskin from an EXTEND cell that we are going to
33089 send to an OR as soon as we are connected". Might help with bug 600.
33090 - Add an in-place version of aes_crypt() so that we can avoid doing a
33091 needless memcpy() call on each cell payload.
33094 Changes in version 0.2.0.18-alpha - 2008-01-25
33095 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
33096 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
33097 that can warn or reject connections to ports generally associated with
33098 vulnerable-plaintext protocols.
33100 o New directory authorities:
33101 - Set up dannenberg (run by CCC) as the sixth v3 directory
33105 - Fix a major memory leak when attempting to use the v2 TLS
33106 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
33107 - We accidentally enabled the under-development v2 TLS handshake
33108 code, which was causing log entries like "TLS error while
33109 renegotiating handshake". Disable it again. Resolves bug 590.
33110 - We were computing the wrong Content-Length: header for directory
33111 responses that need to be compressed on the fly, causing clients
33112 asking for those items to always fail. Bugfix on 0.2.0.x; partially
33116 - Avoid going directly to the directory authorities even if you're a
33117 relay, if you haven't found yourself reachable yet or if you've
33118 decided not to advertise your dirport yet. Addresses bug 556.
33119 - If we've gone 12 hours since our last bandwidth check, and we
33120 estimate we have less than 50KB bandwidth capacity but we could
33121 handle more, do another bandwidth test.
33122 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
33123 Tor can warn and/or refuse connections to ports commonly used with
33124 vulnerable-plaintext protocols. Currently we warn on ports 23,
33125 109, 110, and 143, but we don't reject any.
33128 - When we setconf ClientOnly to 1, close any current OR and Dir
33129 listeners. Reported by mwenge.
33130 - When we get a consensus that's been signed by more people than
33131 we expect, don't log about it; it's not a big deal. Reported
33135 - Don't answer "/tor/networkstatus-bridges" directory requests if
33136 the request isn't encrypted.
33137 - Make "ClientOnly 1" config option disable directory ports too.
33138 - Patches from Karsten Loesing to make v2 hidden services more
33139 robust: work even when there aren't enough HSDir relays available;
33140 retry when a v2 rend desc fetch fails; but don't retry if we
33141 already have a usable v0 rend desc.
33144 Changes in version 0.2.0.17-alpha - 2008-01-17
33145 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
33148 - Make the tor-gencert man page get included correctly in the tarball.
33151 Changes in version 0.2.0.16-alpha - 2008-01-17
33152 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
33153 Loesing, and generally cleans up a lot of features and minor bugs.
33155 o New directory authorities:
33156 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
33159 o Major performance improvements:
33160 - Switch our old ring buffer implementation for one more like that
33161 used by free Unix kernels. The wasted space in a buffer with 1mb
33162 of data will now be more like 8k than 1mb. The new implementation
33163 also avoids realloc();realloc(); patterns that can contribute to
33164 memory fragmentation.
33167 - Configuration files now accept C-style strings as values. This
33168 helps encode characters not allowed in the current configuration
33169 file format, such as newline or #. Addresses bug 557.
33170 - Although we fixed bug 539 (where servers would send HTTP status 503
33171 responses _and_ send a body too), there are still servers out
33172 there that haven't upgraded. Therefore, make clients parse such
33173 bodies when they receive them.
33174 - When we're not serving v2 directory information, there is no reason
33175 to actually keep any around. Remove the obsolete files and directory
33176 on startup if they are very old and we aren't going to serve them.
33178 o Minor performance improvements:
33179 - Reference-count and share copies of address policy entries; only 5%
33180 of them were actually distinct.
33181 - Never walk through the list of logs if we know that no log is
33182 interested in a given message.
33185 - When an authority has not signed a consensus, do not try to
33186 download a nonexistent "certificate with key 00000000". Bugfix
33187 on 0.2.0.x. Fixes bug 569.
33188 - Fix a rare assert error when we're closing one of our threads:
33189 use a mutex to protect the list of logs, so we never write to the
33190 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
33191 bug 575, which is kind of the revenge of bug 222.
33192 - Patch from Karsten Loesing to complain less at both the client
33193 and the relay when a relay used to have the HSDir flag but doesn't
33194 anymore, and we try to upload a hidden service descriptor.
33195 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
33197 - Do not try to download missing certificates until we have tried
33198 to check our fallback consensus. Fixes bug 583.
33199 - Make bridges round reported GeoIP stats info up to the nearest
33200 estimate, not down. Now we can distinguish between "0 people from
33201 this country" and "1 person from this country".
33202 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
33203 - Avoid possible segfault if key generation fails in
33204 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
33205 - Avoid segfault in the case where a badly behaved v2 versioning
33206 directory sends a signed networkstatus with missing client-versions.
33208 - Avoid segfaults on certain complex invocations of
33209 router_get_by_hexdigest(). Bugfix on 0.1.2.
33210 - Correct bad index on array access in parse_http_time(). Bugfix
33212 - Fix possible bug in vote generation when server versions are present
33213 but client versions are not.
33214 - Fix rare bug on REDIRECTSTREAM control command when called with no
33215 port set: it could erroneously report an error when none had
33217 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
33218 compressing large objects and find ourselves with more than 4k
33219 left over. Bugfix on 0.2.0.
33220 - Fix a small memory leak when setting up a hidden service.
33221 - Fix a few memory leaks that could in theory happen under bizarre
33223 - Fix an assert if we post a general-purpose descriptor via the
33224 control port but that descriptor isn't mentioned in our current
33225 network consensus. Bug reported by Jon McLachlan; bugfix on
33228 o Minor features (controller):
33229 - Get NS events working again. Patch from tup.
33230 - The GETCONF command now escapes and quotes configuration values
33231 that don't otherwise fit into the torrc file.
33232 - The SETCONF command now handles quoted values correctly.
33234 o Minor features (directory authorities):
33235 - New configuration options to override default maximum number of
33236 servers allowed on a single IP address. This is important for
33237 running a test network on a single host.
33238 - Actually implement the -s option to tor-gencert.
33239 - Add a manual page for tor-gencert.
33241 o Minor features (bridges):
33242 - Bridge authorities no longer serve bridge descriptors over
33243 unencrypted connections.
33245 o Minor features (other):
33246 - Add hidden services and DNSPorts to the list of things that make
33247 Tor accept that it has running ports. Change starting Tor with no
33248 ports from a fatal error to a warning; we might change it back if
33249 this turns out to confuse anybody. Fixes bug 579.
33252 Changes in version 0.1.2.19 - 2008-01-17
33253 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
33254 exit policy a little bit more conservative so it's safer to run an
33255 exit relay on a home system, and fixes a variety of smaller issues.
33258 - Exit policies now reject connections that are addressed to a
33259 relay's public (external) IP address too, unless
33260 ExitPolicyRejectPrivate is turned off. We do this because too
33261 many relays are running nearby to services that trust them based
33262 on network address.
33265 - When the clock jumps forward a lot, do not allow the bandwidth
33266 buckets to become negative. Fixes bug 544.
33267 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
33268 on every successful resolve. Reported by Mike Perry.
33269 - Purge old entries from the "rephist" database and the hidden
33270 service descriptor database even when DirPort is zero.
33271 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
33272 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
33273 crashing or mis-answering these requests.
33274 - When we decide to send a 503 response to a request for servers, do
33275 not then also send the server descriptors: this defeats the whole
33276 purpose. Fixes bug 539.
33279 - Changing the ExitPolicyRejectPrivate setting should cause us to
33280 rebuild our server descriptor.
33281 - Fix handling of hex nicknames when answering controller requests for
33282 networkstatus by name, or when deciding whether to warn about
33283 unknown routers in a config option. (Patch from mwenge.)
33284 - Fix a couple of hard-to-trigger autoconf problems that could result
33285 in really weird results on platforms whose sys/types.h files define
33286 nonstandard integer types.
33287 - Don't try to create the datadir when running --verify-config or
33288 --hash-password. Resolves bug 540.
33289 - If we were having problems getting a particular descriptor from the
33290 directory caches, and then we learned about a new descriptor for
33291 that router, we weren't resetting our failure count. Reported
33293 - Although we fixed bug 539 (where servers would send HTTP status 503
33294 responses _and_ send a body too), there are still servers out there
33295 that haven't upgraded. Therefore, make clients parse such bodies
33296 when they receive them.
33297 - Run correctly on systems where rlim_t is larger than unsigned long.
33298 This includes some 64-bit systems.
33299 - Run correctly on platforms (like some versions of OS X 10.5) where
33300 the real limit for number of open files is OPEN_FILES, not rlim_max
33301 from getrlimit(RLIMIT_NOFILES).
33302 - Avoid a spurious free on base64 failure.
33303 - Avoid segfaults on certain complex invocations of
33304 router_get_by_hexdigest().
33305 - Fix rare bug on REDIRECTSTREAM control command when called with no
33306 port set: it could erroneously report an error when none had
33310 Changes in version 0.2.0.15-alpha - 2007-12-25
33311 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
33312 features added in 0.2.0.13-alpha.
33315 - Fix several remotely triggerable asserts based on DirPort requests
33316 for a v2 or v3 networkstatus object before we were prepared. This
33317 was particularly bad for 0.2.0.13 and later bridge relays, who
33318 would never have a v2 networkstatus and would thus always crash
33319 when used. Bugfixes on 0.2.0.x.
33320 - Estimate the v3 networkstatus size more accurately, rather than
33321 estimating it at zero bytes and giving it artificially high priority
33322 compared to other directory requests. Bugfix on 0.2.0.x.
33325 - Fix configure.in logic for cross-compilation.
33326 - When we load a bridge descriptor from the cache, and it was
33327 previously unreachable, mark it as retriable so we won't just
33328 ignore it. Also, try fetching a new copy immediately. Bugfixes
33330 - The bridge GeoIP stats were counting other relays, for example
33331 self-reachability and authority-reachability tests.
33334 - Support compilation to target iPhone; patch from cjacker huang.
33335 To build for iPhone, pass the --enable-iphone option to configure.
33338 Changes in version 0.2.0.14-alpha - 2007-12-23
33340 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
33341 without a datadirectory from a previous Tor install. Reported
33343 - Fix a crash when we fetch a descriptor that turns out to be
33344 unexpected (it used to be in our networkstatus when we started
33345 fetching it, but it isn't in our current networkstatus), and we
33346 aren't using bridges. Bugfix on 0.2.0.x.
33347 - Fix a crash when accessing hidden services: it would work the first
33348 time you use a given introduction point for your service, but
33349 on subsequent requests we'd be using garbage memory. Fixed by
33350 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
33351 - Fix a crash when we load a bridge descriptor from disk but we don't
33352 currently have a Bridge line for it in our torrc. Bugfix on
33356 - If bridge authorities set BridgePassword, they will serve a
33357 snapshot of known bridge routerstatuses from their DirPort to
33358 anybody who knows that password. Unset by default.
33361 - Make the unit tests build again.
33362 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
33363 - Make PublishServerDescriptor default to 1, so the default doesn't
33364 have to change as we invent new directory protocol versions.
33365 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
33366 be included unless sys/time.h is already included. Fixes
33367 bug 553. Bugfix on 0.2.0.x.
33368 - If we receive a general-purpose descriptor and then receive an
33369 identical bridge-purpose descriptor soon after, don't discard
33370 the next one as a duplicate.
33373 - If BridgeRelay is set to 1, then the default for
33374 PublishServerDescriptor is now "bridge" rather than "v2,v3".
33375 - If the user sets RelayBandwidthRate but doesn't set
33376 RelayBandwidthBurst, then make them equal rather than erroring out.
33379 Changes in version 0.2.0.13-alpha - 2007-12-21
33380 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
33381 Goodell, fixes many more bugs, and adds a lot of infrastructure for
33384 o New directory authorities:
33385 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
33389 - Only update guard status (usable / not usable) once we have
33390 enough directory information. This was causing us to always pick
33391 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
33392 causing us to discard all our guards on startup if we hadn't been
33393 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
33394 - Purge old entries from the "rephist" database and the hidden
33395 service descriptor databases even when DirPort is zero. Bugfix
33397 - We were ignoring our RelayBandwidthRate for the first 30 seconds
33398 after opening a circuit -- even a relayed circuit. Bugfix on
33400 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
33401 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
33402 crashing or mis-answering these types of requests.
33403 - Relays were publishing their server descriptor to v1 and v2
33404 directory authorities, but they didn't try publishing to v3-only
33405 authorities. Fix this; and also stop publishing to v1 authorities.
33407 - When we were reading router descriptors from cache, we were ignoring
33408 the annotations -- so for example we were reading in bridge-purpose
33409 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
33410 - When we decided to send a 503 response to a request for servers, we
33411 were then also sending the server descriptors: this defeats the
33412 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
33415 - Bridge relays now behave like clients with respect to time
33416 intervals for downloading new consensus documents -- otherwise they
33417 stand out. Bridge users now wait until the end of the interval,
33418 so their bridge relay will be sure to have a new consensus document.
33419 - Three new config options (AlternateDirAuthority,
33420 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
33421 user selectively replace the default directory authorities by type,
33422 rather than the all-or-nothing replacement that DirServer offers.
33423 - Tor can now be configured to read a GeoIP file from disk in one
33424 of two formats. This can be used by controllers to map IP addresses
33425 to countries. Eventually, it may support exit-by-country.
33426 - When possible, bridge relays remember which countries users
33427 are coming from, and report aggregate information in their
33428 extra-info documents, so that the bridge authorities can learn
33429 where Tor is blocked.
33430 - Bridge directory authorities now do reachability testing on the
33431 bridges they know. They provide router status summaries to the
33432 controller via "getinfo ns/purpose/bridge", and also dump summaries
33433 to a file periodically.
33434 - Stop fetching directory info so aggressively if your DirPort is
33435 on but your ORPort is off; stop fetching v2 dir info entirely.
33436 You can override these choices with the new FetchDirInfoEarly
33440 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
33441 consensus documents when there are too many relays at a single
33442 IP address. Now clear it in v2 network status documents too, and
33443 also clear it in routerinfo_t when the relay is no longer listed
33444 in the relevant networkstatus document.
33445 - Don't crash if we get an unexpected value for the
33446 PublishServerDescriptor config option. Reported by Matt Edman;
33447 bugfix on 0.2.0.9-alpha.
33448 - Our new v2 hidden service descriptor format allows descriptors
33449 that have no introduction points. But Tor crashed when we tried
33450 to build a descriptor with no intro points (and it would have
33451 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
33452 by Karsten Loesing.
33453 - Fix building with dmalloc 5.5.2 with glibc.
33454 - Reject uploaded descriptors and extrainfo documents if they're
33455 huge. Otherwise we'll cache them all over the network and it'll
33456 clog everything up. Reported by Aljosha Judmayer.
33457 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
33458 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
33459 - When the DANGEROUS_VERSION controller status event told us we're
33460 running an obsolete version, it used the string "OLD" to describe
33461 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
33462 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
33463 - If we can't expand our list of entry guards (e.g. because we're
33464 using bridges or we have StrictEntryNodes set), don't mark relays
33465 down when they fail a directory request. Otherwise we're too quick
33466 to mark all our entry points down. Bugfix on 0.1.2.x.
33467 - Fix handling of hex nicknames when answering controller requests for
33468 networkstatus by name, or when deciding whether to warn about unknown
33469 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
33470 - Fix a couple of hard-to-trigger autoconf problems that could result
33471 in really weird results on platforms whose sys/types.h files define
33472 nonstandard integer types. Bugfix on 0.1.2.x.
33473 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
33474 - Don't crash on name lookup when we have no current consensus. Fixes
33475 bug 538; bugfix on 0.2.0.x.
33476 - Only Tors that want to mirror the v2 directory info should
33477 create the "cached-status" directory in their datadir. (All Tors
33478 used to create it.) Bugfix on 0.2.0.9-alpha.
33479 - Directory authorities should only automatically download Extra Info
33480 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
33483 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
33484 consumers. (We already do this on HUP.)
33485 - Authorities and caches fetch the v2 networkstatus documents
33486 less often, now that v3 is encouraged.
33487 - Add a new config option BridgeRelay that specifies you want to
33488 be a bridge relay. Right now the only difference is that it makes
33489 you answer begin_dir requests, and it makes you cache dir info,
33490 even if your DirPort isn't on.
33491 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
33492 ask about source, timestamp of arrival, purpose, etc. We need
33493 something like this to help Vidalia not do GeoIP lookups on bridge
33495 - Allow multiple HashedControlPassword config lines, to support
33496 multiple controller passwords.
33497 - Authorities now decide whether they're authoritative for a given
33498 router based on the router's purpose.
33499 - New config options AuthDirBadDir and AuthDirListBadDirs for
33500 authorities to mark certain relays as "bad directories" in the
33501 networkstatus documents. Also supports the "!baddir" directive in
33502 the approved-routers file.
33505 Changes in version 0.2.0.12-alpha - 2007-11-16
33506 This twelfth development snapshot fixes some more build problems as
33507 well as a few minor bugs.
33510 - Make it build on OpenBSD again. Patch from tup.
33511 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
33512 package-building for Red Hat, OS X, etc.
33514 o Minor bugfixes (on 0.1.2.x):
33515 - Changing the ExitPolicyRejectPrivate setting should cause us to
33516 rebuild our server descriptor.
33518 o Minor bugfixes (on 0.2.0.x):
33519 - When we're lacking a consensus, don't try to perform rendezvous
33520 operations. Reported by Karsten Loesing.
33521 - Fix a small memory leak whenever we decide against using a
33522 newly picked entry guard. Reported by Mike Perry.
33523 - When authorities detected more than two relays running on the same
33524 IP address, they were clearing all the status flags but forgetting
33525 to clear the "hsdir" flag. So clients were being told that a
33526 given relay was the right choice for a v2 hsdir lookup, yet they
33527 never had its descriptor because it was marked as 'not running'
33529 - If we're trying to fetch a bridge descriptor and there's no way
33530 the bridge authority could help us (for example, we don't know
33531 a digest, or there is no bridge authority), don't be so eager to
33532 fall back to asking the bridge authority.
33533 - If we're using bridges or have strictentrynodes set, and our
33534 chosen exit is in the same family as all our bridges/entry guards,
33535 then be flexible about families.
33538 - When we negotiate a v2 link-layer connection (not yet implemented),
33539 accept RELAY_EARLY cells and turn them into RELAY cells if we've
33540 negotiated a v1 connection for their next step. Initial code for
33544 Changes in version 0.2.0.11-alpha - 2007-11-12
33545 This eleventh development snapshot fixes some build problems with
33546 the previous snapshot. It also includes a more secure-by-default exit
33547 policy for relays, fixes an enormous memory leak for exit relays, and
33548 fixes another bug where servers were falling out of the directory list.
33551 - Exit policies now reject connections that are addressed to a
33552 relay's public (external) IP address too, unless
33553 ExitPolicyRejectPrivate is turned off. We do this because too
33554 many relays are running nearby to services that trust them based
33555 on network address. Bugfix on 0.1.2.x.
33558 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
33559 on every successful resolve. Reported by Mike Perry; bugfix
33561 - On authorities, never downgrade to old router descriptors simply
33562 because they're listed in the consensus. This created a catch-22
33563 where we wouldn't list a new descriptor because there was an
33564 old one in the consensus, and we couldn't get the new one in the
33565 consensus because we wouldn't list it. Possible fix for bug 548.
33566 Also, this might cause bug 543 to appear on authorities; if so,
33567 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
33569 o Packaging fixes on 0.2.0.10-alpha:
33570 - We were including instructions about what to do with the
33571 src/config/fallback-consensus file, but we weren't actually
33572 including it in the tarball. Disable all of that for now.
33575 - Allow people to say PreferTunnelledDirConns rather than
33576 PreferTunneledDirConns, for those alternate-spellers out there.
33579 - Don't reevaluate all the information from our consensus document
33580 just because we've downloaded a v2 networkstatus that we intend
33581 to cache. Fixes bug 545; bugfix on 0.2.0.x.
33584 Changes in version 0.2.0.10-alpha - 2007-11-10
33585 This tenth development snapshot adds a third v3 directory authority
33586 run by Mike Perry, adds most of Karsten Loesing's new hidden service
33587 descriptor format, fixes a bad crash bug and new bridge bugs introduced
33588 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
33589 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
33590 addresses many more minor issues.
33592 o New directory authorities:
33593 - Set up ides (run by Mike Perry) as the third v3 directory authority.
33596 - Allow tunnelled directory connections to ask for an encrypted
33597 "begin_dir" connection or an anonymized "uses a full Tor circuit"
33598 connection independently. Now we can make anonymized begin_dir
33599 connections for (e.g.) more secure hidden service posting and
33601 - More progress on proposal 114: code from Karsten Loesing to
33602 implement new hidden service descriptor format.
33603 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
33604 accommodate the growing number of servers that use the default
33605 and are reaching it.
33606 - Directory authorities use a new formula for selecting which nodes
33607 to advertise as Guards: they must be in the top 7/8 in terms of
33608 how long we have known about them, and above the median of those
33609 nodes in terms of weighted fractional uptime.
33610 - Make "not enough dir info yet" warnings describe *why* Tor feels
33611 it doesn't have enough directory info yet.
33614 - Stop servers from crashing if they set a Family option (or
33615 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
33617 - Make bridge users work again -- the move to v3 directories in
33618 0.2.0.9-alpha had introduced a number of bugs that made bridges
33619 no longer work for clients.
33620 - When the clock jumps forward a lot, do not allow the bandwidth
33621 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
33623 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
33624 - When the consensus lists a router descriptor that we previously were
33625 mirroring, but that we considered non-canonical, reload the
33626 descriptor as canonical. This fixes bug 543 where Tor servers
33627 would start complaining after a few days that they don't have
33628 enough directory information to build a circuit.
33629 - Consider replacing the current consensus when certificates arrive
33630 that make the pending consensus valid. Previously, we were only
33631 considering replacement when the new certs _didn't_ help.
33632 - Fix an assert error on startup if we didn't already have the
33633 consensus and certs cached in our datadirectory: we were caching
33634 the consensus in consensus_waiting_for_certs but then free'ing it
33636 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
33637 Request) if we need more v3 certs but we've already got pending
33638 requests for all of them.
33639 - Correctly back off from failing certificate downloads. Fixes
33641 - Authorities don't vote on the Running flag if they have been running
33642 for less than 30 minutes themselves. Fixes bug 547, where a newly
33643 started authority would vote that everyone was down.
33645 o New requirements:
33646 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
33647 it, it had no AES, and it hasn't seen any security patches since
33651 - Clients now hold circuitless TLS connections open for 1.5 times
33652 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
33653 rebuild a new circuit over them within that timeframe. Previously,
33654 they held them open only for KeepalivePeriod (5 minutes).
33655 - Use "If-Modified-Since" to avoid retrieving consensus
33656 networkstatuses that we already have.
33657 - When we have no consensus, check FallbackNetworkstatusFile (defaults
33658 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
33659 we start knowing some directory caches.
33660 - When we receive a consensus from the future, warn about skew.
33661 - Improve skew reporting: try to give the user a better log message
33662 about how skewed they are, and how much this matters.
33663 - When we have a certificate for an authority, believe that
33664 certificate's claims about the authority's IP address.
33665 - New --quiet command-line option to suppress the default console log.
33666 Good in combination with --hash-password.
33667 - Authorities send back an X-Descriptor-Not-New header in response to
33668 an accepted-but-discarded descriptor upload. Partially implements
33670 - Make the log message for "tls error. breaking." more useful.
33671 - Better log messages about certificate downloads, to attempt to
33672 track down the second incarnation of bug 546.
33674 o Minor features (bridges):
33675 - If bridge users set UpdateBridgesFromAuthority, but the digest
33676 they ask for is a 404 from the bridge authority, they now fall
33677 back to trying the bridge directly.
33678 - Bridges now use begin_dir to publish their server descriptor to
33679 the bridge authority, even when they haven't set TunnelDirConns.
33681 o Minor features (controller):
33682 - When reporting clock skew, and we know that the clock is _at least
33683 as skewed_ as some value, but we don't know the actual value,
33684 report the value as a "minimum skew."
33687 - Update linux-tor-prio.sh script to allow QoS based on the uid of
33688 the Tor process. Patch from Marco Bonetti with tweaks from Mike
33692 - Refuse to start if both ORPort and UseBridges are set. Bugfix
33693 on 0.2.0.x, suggested by Matt Edman.
33694 - Don't stop fetching descriptors when FetchUselessDescriptors is
33695 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
33696 reported by tup and ioerror.
33697 - Better log message on vote from unknown authority.
33698 - Don't log "Launching 0 request for 0 router" message.
33700 o Minor bugfixes (memory leaks):
33701 - Stop leaking memory every time we parse a v3 certificate. Bugfix
33703 - Stop leaking memory every time we load a v3 certificate. Bugfix
33704 on 0.2.0.1-alpha. Fixes bug 536.
33705 - Stop leaking a cached networkstatus on exit. Bugfix on
33707 - Stop leaking voter information every time we free a consensus.
33708 Bugfix on 0.2.0.3-alpha.
33709 - Stop leaking signed data every time we check a voter signature.
33710 Bugfix on 0.2.0.3-alpha.
33711 - Stop leaking a signature every time we fail to parse a consensus or
33712 a vote. Bugfix on 0.2.0.3-alpha.
33713 - Stop leaking v2_download_status_map on shutdown. Bugfix on
33715 - Stop leaking conn->nickname every time we make a connection to a
33716 Tor relay without knowing its expected identity digest (e.g. when
33717 using bridges). Bugfix on 0.2.0.3-alpha.
33719 - Minor bugfixes (portability):
33720 - Run correctly on platforms where rlim_t is larger than unsigned
33721 long, and/or where the real limit for number of open files is
33722 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
33723 particular, these may be needed for OS X 10.5.
33726 Changes in version 0.1.2.18 - 2007-10-28
33727 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
33728 hidden service introduction that were causing huge delays, and a big
33729 bug that was causing some servers to disappear from the network status
33730 lists for a few hours each day.
33732 o Major bugfixes (crashes):
33733 - If a connection is shut down abruptly because of something that
33734 happened inside connection_flushed_some(), do not call
33735 connection_finished_flushing(). Should fix bug 451:
33736 "connection_stop_writing: Assertion conn->write_event failed"
33737 Bugfix on 0.1.2.7-alpha.
33738 - Fix possible segfaults in functions called from
33739 rend_process_relay_cell().
33741 o Major bugfixes (hidden services):
33742 - Hidden services were choosing introduction points uniquely by
33743 hexdigest, but when constructing the hidden service descriptor
33744 they merely wrote the (potentially ambiguous) nickname.
33745 - Clients now use the v2 intro format for hidden service
33746 connections: they specify their chosen rendezvous point by identity
33747 digest rather than by (potentially ambiguous) nickname. These
33748 changes could speed up hidden service connections dramatically.
33750 o Major bugfixes (other):
33751 - Stop publishing a new server descriptor just because we get a
33752 HUP signal. This led (in a roundabout way) to some servers getting
33753 dropped from the networkstatus lists for a few hours each day.
33754 - When looking for a circuit to cannibalize, consider family as well
33755 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
33756 circuit cannibalization).
33757 - When a router wasn't listed in a new networkstatus, we were leaving
33758 the flags for that router alone -- meaning it remained Named,
33759 Running, etc -- even though absence from the networkstatus means
33760 that it shouldn't be considered to exist at all anymore. Now we
33761 clear all the flags for routers that fall out of the networkstatus
33762 consensus. Fixes bug 529.
33765 - Don't try to access (or alter) the state file when running
33766 --list-fingerprint or --verify-config or --hash-password. Resolves
33768 - When generating information telling us how to extend to a given
33769 router, do not try to include the nickname if it is
33770 absent. Resolves bug 467.
33771 - Fix a user-triggerable segfault in expand_filename(). (There isn't
33772 a way to trigger this remotely.)
33773 - When sending a status event to the controller telling it that an
33774 OR address is reachable, set the port correctly. (Previously we
33775 were reporting the dir port.)
33776 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
33777 command. Bugfix on 0.1.2.17.
33778 - When loading bandwidth history, do not believe any information in
33779 the future. Fixes bug 434.
33780 - When loading entry guard information, do not believe any information
33782 - When we have our clock set far in the future and generate an
33783 onion key, then re-set our clock to be correct, we should not stop
33784 the onion key from getting rotated.
33785 - On some platforms, accept() can return a broken address. Detect
33786 this more quietly, and deal accordingly. Fixes bug 483.
33787 - It's not actually an error to find a non-pending entry in the DNS
33788 cache when canceling a pending resolve. Don't log unless stuff
33789 is fishy. Resolves bug 463.
33790 - Don't reset trusted dir server list when we set a configuration
33791 option. Patch from Robert Hogan.
33792 - Don't try to create the datadir when running --verify-config or
33793 --hash-password. Resolves bug 540.
33796 Changes in version 0.2.0.9-alpha - 2007-10-24
33797 This ninth development snapshot switches clients to the new v3 directory
33798 system; allows servers to be listed in the network status even when they
33799 have the same nickname as a registered server; and fixes many other
33800 bugs including a big one that was causing some servers to disappear
33801 from the network status lists for a few hours each day.
33803 o Major features (directory system):
33804 - Clients now download v3 consensus networkstatus documents instead
33805 of v2 networkstatus documents. Clients and caches now base their
33806 opinions about routers on these consensus documents. Clients only
33807 download router descriptors listed in the consensus.
33808 - Authorities now list servers who have the same nickname as
33809 a different named server, but list them with a new flag,
33810 "Unnamed". Now we can list servers that happen to pick the same
33811 nickname as a server that registered two years ago and then
33812 disappeared. Partially implements proposal 122.
33813 - If the consensus lists a router as "Unnamed", the name is assigned
33814 to a different router: do not identify the router by that name.
33815 Partially implements proposal 122.
33816 - Authorities can now come to a consensus on which method to use to
33817 compute the consensus. This gives us forward compatibility.
33820 - Stop publishing a new server descriptor just because we HUP or
33821 when we find our DirPort to be reachable but won't actually publish
33822 it. New descriptors without any real changes are dropped by the
33823 authorities, and can screw up our "publish every 18 hours" schedule.
33825 - When a router wasn't listed in a new networkstatus, we were leaving
33826 the flags for that router alone -- meaning it remained Named,
33827 Running, etc -- even though absence from the networkstatus means
33828 that it shouldn't be considered to exist at all anymore. Now we
33829 clear all the flags for routers that fall out of the networkstatus
33830 consensus. Fixes bug 529; bugfix on 0.1.2.x.
33831 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
33832 extrainfo documents and then discard them immediately for not
33833 matching the latest router. Bugfix on 0.2.0.1-alpha.
33835 o Minor features (v3 directory protocol):
33836 - Allow tor-gencert to generate a new certificate without replacing
33838 - Allow certificates to include an address.
33839 - When we change our directory-cache settings, reschedule all voting
33840 and download operations.
33841 - Reattempt certificate downloads immediately on failure, as long as
33842 we haven't failed a threshold number of times yet.
33843 - Delay retrying consensus downloads while we're downloading
33844 certificates to verify the one we just got. Also, count getting a
33845 consensus that we already have (or one that isn't valid) as a failure,
33846 and count failing to get the certificates after 20 minutes as a
33848 - Build circuits and download descriptors even if our consensus is a
33849 little expired. (This feature will go away once authorities are
33852 o Minor features (router descriptor cache):
33853 - If we find a cached-routers file that's been sitting around for more
33854 than 28 days unmodified, then most likely it's a leftover from
33855 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
33857 - When we (as a cache) download a descriptor because it was listed
33858 in a consensus, remember when the consensus was supposed to expire,
33859 and don't expire the descriptor until then.
33861 o Minor features (performance):
33862 - Call routerlist_remove_old_routers() much less often. This should
33863 speed startup, especially on directory caches.
33864 - Don't try to launch new descriptor downloads quite so often when we
33865 already have enough directory information to build circuits.
33866 - Base64 decoding was actually showing up on our profile when parsing
33867 the initial descriptor file; switch to an in-process all-at-once
33868 implementation that's about 3.5x times faster than calling out to
33871 o Minor features (compilation):
33872 - Detect non-ASCII platforms (if any still exist) and refuse to
33873 build there: some of our code assumes that 'A' is 65 and so on.
33875 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
33876 - Make the "next period" votes into "current period" votes immediately
33877 after publishing the consensus; avoid a heisenbug that made them
33878 stick around indefinitely.
33879 - When we discard a vote as a duplicate, do not report this as
33881 - Treat missing v3 keys or certificates as an error when running as a
33882 v3 directory authority.
33883 - When we're configured to be a v3 authority, but we're only listed
33884 as a non-v3 authority in our DirServer line for ourself, correct
33886 - If an authority doesn't have a qualified hostname, just put
33887 its address in the vote. This fixes the problem where we referred to
33888 "moria on moria:9031."
33889 - Distinguish between detached signatures for the wrong period, and
33890 detached signatures for a divergent vote.
33891 - Fix a small memory leak when computing a consensus.
33892 - When there's no consensus, we were forming a vote every 30
33893 minutes, but writing the "valid-after" line in our vote based
33894 on our configured V3AuthVotingInterval: so unless the intervals
33895 matched up, we immediately rejected our own vote because it didn't
33896 start at the voting interval that caused us to construct a vote.
33898 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
33899 - Delete unverified-consensus when the real consensus is set.
33900 - Consider retrying a consensus networkstatus fetch immediately
33901 after one fails: don't wait 60 seconds to notice.
33902 - When fetching a consensus as a cache, wait until a newer consensus
33903 should exist before trying to replace the current one.
33904 - Use a more forgiving schedule for retrying failed consensus
33905 downloads than for other types.
33907 o Minor bugfixes (other directory issues):
33908 - Correct the implementation of "download votes by digest." Bugfix on
33910 - Authorities no longer send back "400 you're unreachable please fix
33911 it" errors to Tor servers that aren't online all the time. We're
33912 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
33914 o Minor bugfixes (controller):
33915 - Don't reset trusted dir server list when we set a configuration
33916 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
33917 - Respond to INT and TERM SIGNAL commands before we execute the
33918 signal, in case the signal shuts us down. We had a patch in
33919 0.1.2.1-alpha that tried to do this by queueing the response on
33920 the connection's buffer before shutting down, but that really
33921 isn't the same thing at all. Bug located by Matt Edman.
33923 o Minor bugfixes (misc):
33924 - Correctly check for bad options to the "PublishServerDescriptor"
33925 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
33926 - Stop leaking memory on failing case of base32_decode, and make
33927 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
33928 - Don't try to download extrainfo documents when we're trying to
33929 fetch enough directory info to build a circuit: having enough
33930 info should get priority. Bugfix on 0.2.0.x.
33931 - Don't complain that "your server has not managed to confirm that its
33932 ports are reachable" if we haven't been able to build any circuits
33933 yet. Bug found by spending four hours without a v3 consensus. Bugfix
33935 - Detect the reason for failing to mmap a descriptor file we just
33936 wrote, and give a more useful log message. Fixes bug 533. Bugfix
33939 o Code simplifications and refactoring:
33940 - Remove support for the old bw_accounting file: we've been storing
33941 bandwidth accounting information in the state file since
33942 0.1.2.5-alpha. This may result in bandwidth accounting errors
33943 if you try to upgrade from 0.1.1.x or earlier, or if you try to
33944 downgrade to 0.1.1.x or earlier.
33945 - New convenience code to locate a file within the DataDirectory.
33946 - Move non-authority functionality out of dirvote.c.
33947 - Refactor the arguments for router_pick_{directory_|trusteddir}server
33948 so that they all take the same named flags.
33951 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
33952 Unix users an easy way to script their Tor process (e.g. by
33953 adjusting bandwidth based on the time of the day).
33956 Changes in version 0.2.0.8-alpha - 2007-10-12
33957 This eighth development snapshot fixes a crash bug that's been bothering
33958 us since February 2007, lets bridge authorities store a list of bridge
33959 descriptors they've seen, gets v3 directory voting closer to working,
33960 starts caching v3 directory consensus documents on directory mirrors,
33961 and fixes a variety of smaller issues including some minor memory leaks.
33963 o Major features (router descriptor cache):
33964 - Store routers in a file called cached-descriptors instead of in
33965 cached-routers. Initialize cached-descriptors from cached-routers
33966 if the old format is around. The new format allows us to store
33967 annotations along with descriptors.
33968 - Use annotations to record the time we received each descriptor, its
33969 source, and its purpose.
33970 - Disable the SETROUTERPURPOSE controller command: it is now
33972 - Controllers should now specify cache=no or cache=yes when using
33973 the +POSTDESCRIPTOR command.
33974 - Bridge authorities now write bridge descriptors to disk, meaning
33975 we can export them to other programs and begin distributing them
33978 o Major features (directory authorities):
33979 - When a v3 authority is missing votes or signatures, it now tries
33981 - Directory authorities track weighted fractional uptime as well as
33982 weighted mean-time-between failures. WFU is suitable for deciding
33983 whether a node is "usually up", while MTBF is suitable for deciding
33984 whether a node is "likely to stay up." We need both, because
33985 "usually up" is a good requirement for guards, while "likely to
33986 stay up" is a good requirement for long-lived connections.
33988 o Major features (v3 directory system):
33989 - Caches now download v3 network status documents as needed,
33990 and download the descriptors listed in them.
33991 - All hosts now attempt to download and keep fresh v3 authority
33992 certificates, and re-attempt after failures.
33993 - More internal-consistency checks for vote parsing.
33995 o Major bugfixes (crashes):
33996 - If a connection is shut down abruptly because of something that
33997 happened inside connection_flushed_some(), do not call
33998 connection_finished_flushing(). Should fix bug 451. Bugfix on
34001 o Major bugfixes (performance):
34002 - Fix really bad O(n^2) performance when parsing a long list of
34003 routers: Instead of searching the entire list for an "extra-info "
34004 string which usually wasn't there, once for every routerinfo
34005 we read, just scan lines forward until we find one we like.
34007 - When we add data to a write buffer in response to the data on that
34008 write buffer getting low because of a flush, do not consider the
34009 newly added data as a candidate for immediate flushing, but rather
34010 make it wait until the next round of writing. Otherwise, we flush
34011 and refill recursively, and a single greedy TLS connection can
34012 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
34014 o Minor features (v3 authority system):
34015 - Add more ways for tools to download the votes that lead to the
34017 - Send a 503 when low on bandwidth and a vote, consensus, or
34018 certificate is requested.
34019 - If-modified-since is now implemented properly for all kinds of
34020 certificate requests.
34022 o Minor bugfixes (network statuses):
34023 - Tweak the implementation of proposal 109 slightly: allow at most
34024 two Tor servers on the same IP address, except if it's the location
34025 of a directory authority, in which case allow five. Bugfix on
34028 o Minor bugfixes (controller):
34029 - When sending a status event to the controller telling it that an
34030 OR address is reachable, set the port correctly. (Previously we
34031 were reporting the dir port.) Bugfix on 0.1.2.x.
34033 o Minor bugfixes (v3 directory system):
34034 - Fix logic to look up a cert by its signing key digest. Bugfix on
34036 - Only change the reply to a vote to "OK" if it's not already
34037 set. This gets rid of annoying "400 OK" log messages, which may
34038 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
34039 - When we get a valid consensus, recompute the voting schedule.
34040 - Base the valid-after time of a vote on the consensus voting
34041 schedule, not on our preferred schedule.
34042 - Make the return values and messages from signature uploads and
34043 downloads more sensible.
34044 - Fix a memory leak when serving votes and consensus documents, and
34045 another when serving certificates.
34047 o Minor bugfixes (performance):
34048 - Use a slightly simpler string hashing algorithm (copying Python's
34049 instead of Java's) and optimize our digest hashing algorithm to take
34050 advantage of 64-bit platforms and to remove some possibly-costly
34052 - Fix a minor memory leak whenever we parse guards from our state
34053 file. Bugfix on 0.2.0.7-alpha.
34054 - Fix a minor memory leak whenever we write out a file. Bugfix on
34056 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
34057 command. Bugfix on 0.2.0.5-alpha.
34059 o Minor bugfixes (portability):
34060 - On some platforms, accept() can return a broken address. Detect
34061 this more quietly, and deal accordingly. Fixes bug 483.
34062 - Stop calling tor_strlower() on uninitialized memory in some cases.
34063 Bugfix in 0.2.0.7-alpha.
34065 o Minor bugfixes (usability):
34066 - Treat some 403 responses from directory servers as INFO rather than
34067 WARN-severity events.
34068 - It's not actually an error to find a non-pending entry in the DNS
34069 cache when canceling a pending resolve. Don't log unless stuff is
34070 fishy. Resolves bug 463.
34072 o Minor bugfixes (anonymity):
34073 - Never report that we've used more bandwidth than we're willing to
34074 relay: it leaks how much non-relay traffic we're using. Resolves
34076 - When looking for a circuit to cannibalize, consider family as well
34077 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
34078 circuit cannibalization).
34080 o Code simplifications and refactoring:
34081 - Make a bunch of functions static. Remove some dead code.
34082 - Pull out about a third of the really big routerlist.c; put it in a
34083 new module, networkstatus.c.
34084 - Merge the extra fields in local_routerstatus_t back into
34085 routerstatus_t: we used to need one routerstatus_t for each
34086 authority's opinion, plus a local_routerstatus_t for the locally
34087 computed consensus opinion. To save space, we put the locally
34088 modified fields into local_routerstatus_t, and only the common
34089 stuff into routerstatus_t. But once v3 directories are in use,
34090 clients and caches will no longer need to hold authority opinions;
34091 thus, the rationale for keeping the types separate is now gone.
34092 - Make the code used to reschedule and reattempt downloads more
34094 - Turn all 'Are we a directory server/mirror?' logic into a call to
34096 - Remove the code to generate the oldest (v1) directory format.
34097 The code has been disabled since 0.2.0.5-alpha.
34100 Changes in version 0.2.0.7-alpha - 2007-09-21
34101 This seventh development snapshot makes bridges work again, makes bridge
34102 authorities work for the first time, fixes two huge performance flaws
34103 in hidden services, and fixes a variety of minor issues.
34105 o New directory authorities:
34106 - Set up moria1 and tor26 as the first v3 directory authorities. See
34107 doc/spec/dir-spec.txt for details on the new directory design.
34109 o Major bugfixes (crashes):
34110 - Fix possible segfaults in functions called from
34111 rend_process_relay_cell(). Bugfix on 0.1.2.x.
34113 o Major bugfixes (bridges):
34114 - Fix a bug that made servers send a "404 Not found" in response to
34115 attempts to fetch their server descriptor. This caused Tor servers
34116 to take many minutes to establish reachability for their DirPort,
34117 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
34118 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
34119 users configure that and specify a bridge with an identity
34120 fingerprint, now they will lookup the bridge descriptor at the
34121 default bridge authority via a one-hop tunnel, but once circuits
34122 are established they will switch to a three-hop tunnel for later
34123 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
34125 o Major bugfixes (hidden services):
34126 - Hidden services were choosing introduction points uniquely by
34127 hexdigest, but when constructing the hidden service descriptor
34128 they merely wrote the (potentially ambiguous) nickname.
34129 - Clients now use the v2 intro format for hidden service
34130 connections: they specify their chosen rendezvous point by identity
34131 digest rather than by (potentially ambiguous) nickname. Both
34132 are bugfixes on 0.1.2.x, and they could speed up hidden service
34133 connections dramatically. Thanks to Karsten Loesing.
34135 o Minor features (security):
34136 - As a client, do not believe any server that tells us that an
34137 address maps to an internal address space.
34138 - Make it possible to enable HashedControlPassword and
34139 CookieAuthentication at the same time.
34141 o Minor features (guard nodes):
34142 - Tag every guard node in our state file with the version that
34143 we believe added it, or with our own version if we add it. This way,
34144 if a user temporarily runs an old version of Tor and then switches
34145 back to a new one, she doesn't automatically lose her guards.
34147 o Minor features (speed):
34148 - When implementing AES counter mode, update only the portions of the
34149 counter buffer that need to change, and don't keep separate
34150 network-order and host-order counters when they are the same (i.e.,
34151 on big-endian hosts.)
34153 o Minor features (controller):
34154 - Accept LF instead of CRLF on controller, since some software has a
34155 hard time generating real Internet newlines.
34156 - Add GETINFO values for the server status events
34157 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
34160 o Removed features:
34161 - Routers no longer include bandwidth-history lines in their
34162 descriptors; this information is already available in extra-info
34163 documents, and including it in router descriptors took up 60%
34164 (!) of compressed router descriptor downloads. Completes
34165 implementation of proposal 104.
34166 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
34167 and TorControl.py, as they use the old v0 controller protocol,
34168 and are obsoleted by TorFlow anyway.
34169 - Drop support for v1 rendezvous descriptors, since we never used
34170 them anyway, and the code has probably rotted by now. Based on
34171 patch from Karsten Loesing.
34172 - On OSX, stop warning the user that kqueue support in libevent is
34173 "experimental", since it seems to have worked fine for ages.
34176 - When generating information telling us how to extend to a given
34177 router, do not try to include the nickname if it is absent. Fixes
34178 bug 467. Bugfix on 0.2.0.3-alpha.
34179 - Fix a user-triggerable (but not remotely-triggerable) segfault
34180 in expand_filename(). Bugfix on 0.1.2.x.
34181 - Fix a memory leak when freeing incomplete requests from DNSPort.
34182 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
34183 - Don't try to access (or alter) the state file when running
34184 --list-fingerprint or --verify-config or --hash-password. (Resolves
34185 bug 499.) Bugfix on 0.1.2.x.
34186 - Servers used to decline to publish their DirPort if their
34187 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
34188 were below a threshold. Now they only look at BandwidthRate and
34189 RelayBandwidthRate. Bugfix on 0.1.2.x.
34190 - Remove an optimization in the AES counter-mode code that assumed
34191 that the counter never exceeded 2^68. When the counter can be set
34192 arbitrarily as an IV (as it is by Karsten's new hidden services
34193 code), this assumption no longer holds. Bugfix on 0.1.2.x.
34194 - Resume listing "AUTHORITY" flag for authorities in network status.
34195 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
34197 o Code simplifications and refactoring:
34198 - Revamp file-writing logic so we don't need to have the entire
34199 contents of a file in memory at once before we write to disk. Tor,
34201 - Turn "descriptor store" into a full-fledged type.
34202 - Move all NT services code into a separate source file.
34203 - Unify all code that computes medians, percentile elements, etc.
34204 - Get rid of a needless malloc when parsing address policies.
34207 Changes in version 0.1.2.17 - 2007-08-30
34208 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
34209 X bundles. Vidalia 0.0.14 makes authentication required for the
34210 ControlPort in the default configuration, which addresses important
34211 security risks. Everybody who uses Vidalia (or another controller)
34214 In addition, this Tor update fixes major load balancing problems with
34215 path selection, which should speed things up a lot once many people
34218 o Major bugfixes (security):
34219 - We removed support for the old (v0) control protocol. It has been
34220 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
34221 become more of a headache than it's worth.
34223 o Major bugfixes (load balancing):
34224 - When choosing nodes for non-guard positions, weight guards
34225 proportionally less, since they already have enough load. Patch
34227 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
34228 will allow fast Tor servers to get more attention.
34229 - When we're upgrading from an old Tor version, forget our current
34230 guards and pick new ones according to the new weightings. These
34231 three load balancing patches could raise effective network capacity
34232 by a factor of four. Thanks to Mike Perry for measurements.
34234 o Major bugfixes (stream expiration):
34235 - Expire not-yet-successful application streams in all cases if
34236 they've been around longer than SocksTimeout. Right now there are
34237 some cases where the stream will live forever, demanding a new
34238 circuit every 15 seconds. Fixes bug 454; reported by lodger.
34240 o Minor features (controller):
34241 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
34242 is valid before any authentication has been received. It tells
34243 a controller what kind of authentication is expected, and what
34244 protocol is spoken. Implements proposal 119.
34246 o Minor bugfixes (performance):
34247 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
34248 greatly speeding up loading cached-routers from disk on startup.
34249 - Disable sentinel-based debugging for buffer code: we squashed all
34250 the bugs that this was supposed to detect a long time ago, and now
34251 its only effect is to change our buffer sizes from nice powers of
34252 two (which platform mallocs tend to like) to values slightly over
34253 powers of two (which make some platform mallocs sad).
34255 o Minor bugfixes (misc):
34256 - If exit bandwidth ever exceeds one third of total bandwidth, then
34257 use the correct formula to weight exit nodes when choosing paths.
34258 Based on patch from Mike Perry.
34259 - Choose perfectly fairly among routers when choosing by bandwidth and
34260 weighting by fraction of bandwidth provided by exits. Previously, we
34261 would choose with only approximate fairness, and correct ourselves
34262 if we ran off the end of the list.
34263 - If we require CookieAuthentication but we fail to write the
34264 cookie file, we would warn but not exit, and end up in a state
34265 where no controller could authenticate. Now we exit.
34266 - If we require CookieAuthentication, stop generating a new cookie
34267 every time we change any piece of our config.
34268 - Refuse to start with certain directory authority keys, and
34269 encourage people using them to stop.
34270 - Terminate multi-line control events properly. Original patch
34272 - Fix a minor memory leak when we fail to find enough suitable
34273 servers to choose a circuit.
34274 - Stop leaking part of the descriptor when we run into a particularly
34275 unparseable piece of it.
34278 Changes in version 0.2.0.6-alpha - 2007-08-26
34279 This sixth development snapshot features a new Vidalia version in the
34280 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
34281 the ControlPort in the default configuration, which addresses important
34284 In addition, this snapshot fixes major load balancing problems
34285 with path selection, which should speed things up a lot once many
34286 people have upgraded. The directory authorities also use a new
34287 mean-time-between-failure approach to tracking which servers are stable,
34288 rather than just looking at the most recent uptime.
34290 o New directory authorities:
34291 - Set up Tonga as the default bridge directory authority.
34294 - Directory authorities now track servers by weighted
34295 mean-times-between-failures. When we have 4 or more days of data,
34296 use measured MTBF rather than declared uptime to decide whether
34297 to call a router Stable. Implements proposal 108.
34299 o Major bugfixes (load balancing):
34300 - When choosing nodes for non-guard positions, weight guards
34301 proportionally less, since they already have enough load. Patch
34303 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
34304 will allow fast Tor servers to get more attention.
34305 - When we're upgrading from an old Tor version, forget our current
34306 guards and pick new ones according to the new weightings. These
34307 three load balancing patches could raise effective network capacity
34308 by a factor of four. Thanks to Mike Perry for measurements.
34310 o Major bugfixes (descriptor parsing):
34311 - Handle unexpected whitespace better in malformed descriptors. Bug
34312 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
34315 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
34316 GETINFO for Torstat to use until it can switch to using extrainfos.
34317 - Optionally (if built with -DEXPORTMALLINFO) export the output
34318 of mallinfo via http, as tor/mallinfo.txt. Only accessible
34322 - Do not intermix bridge routers with controller-added
34323 routers. (Bugfix on 0.2.0.x)
34324 - Do not fail with an assert when accept() returns an unexpected
34325 address family. Addresses but does not wholly fix bug 483. (Bugfix
34327 - Let directory authorities startup even when they can't generate
34328 a descriptor immediately, e.g. because they don't know their
34330 - Stop putting the authentication cookie in a file called "0"
34331 in your working directory if you don't specify anything for the
34332 new CookieAuthFile option. Reported by Matt Edman.
34333 - Make it possible to read the PROTOCOLINFO response in a way that
34334 conforms to our control-spec. Reported by Matt Edman.
34335 - Fix a minor memory leak when we fail to find enough suitable
34336 servers to choose a circuit. Bugfix on 0.1.2.x.
34337 - Stop leaking part of the descriptor when we run into a particularly
34338 unparseable piece of it. Bugfix on 0.1.2.x.
34339 - Unmap the extrainfo cache file on exit.
34342 Changes in version 0.2.0.5-alpha - 2007-08-19
34343 This fifth development snapshot fixes compilation on Windows again;
34344 fixes an obnoxious client-side bug that slowed things down and put
34345 extra load on the network; gets us closer to using the v3 directory
34346 voting scheme; makes it easier for Tor controllers to use cookie-based
34347 authentication; and fixes a variety of other bugs.
34349 o Removed features:
34350 - Version 1 directories are no longer generated in full. Instead,
34351 authorities generate and serve "stub" v1 directories that list
34352 no servers. This will stop Tor versions 0.1.0.x and earlier from
34353 working, but (for security reasons) nobody should be running those
34356 o Major bugfixes (compilation, 0.2.0.x):
34357 - Try to fix Win32 compilation again: improve checking for IPv6 types.
34358 - Try to fix MSVC compilation: build correctly on platforms that do
34359 not define s6_addr16 or s6_addr32.
34360 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
34363 o Major bugfixes (stream expiration):
34364 - Expire not-yet-successful application streams in all cases if
34365 they've been around longer than SocksTimeout. Right now there are
34366 some cases where the stream will live forever, demanding a new
34367 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
34368 reported by lodger.
34370 o Minor features (directory servers):
34371 - When somebody requests a list of statuses or servers, and we have
34372 none of those, return a 404 rather than an empty 200.
34374 o Minor features (directory voting):
34375 - Store v3 consensus status consensuses on disk, and reload them
34378 o Minor features (security):
34379 - Warn about unsafe ControlPort configurations.
34380 - Refuse to start with certain directory authority keys, and
34381 encourage people using them to stop.
34383 o Minor features (controller):
34384 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
34385 is valid before any authentication has been received. It tells
34386 a controller what kind of authentication is expected, and what
34387 protocol is spoken. Implements proposal 119.
34388 - New config option CookieAuthFile to choose a new location for the
34389 cookie authentication file, and config option
34390 CookieAuthFileGroupReadable to make it group-readable.
34392 o Minor features (unit testing):
34393 - Add command-line arguments to unit-test executable so that we can
34394 invoke any chosen test from the command line rather than having
34395 to run the whole test suite at once; and so that we can turn on
34396 logging for the unit tests.
34398 o Minor bugfixes (on 0.1.2.x):
34399 - If we require CookieAuthentication but we fail to write the
34400 cookie file, we would warn but not exit, and end up in a state
34401 where no controller could authenticate. Now we exit.
34402 - If we require CookieAuthentication, stop generating a new cookie
34403 every time we change any piece of our config.
34404 - When loading bandwidth history, do not believe any information in
34405 the future. Fixes bug 434.
34406 - When loading entry guard information, do not believe any information
34408 - When we have our clock set far in the future and generate an
34409 onion key, then re-set our clock to be correct, we should not stop
34410 the onion key from getting rotated.
34411 - Clean up torrc sample config file.
34412 - Do not automatically run configure from autogen.sh. This
34413 non-standard behavior tended to annoy people who have built other
34416 o Minor bugfixes (on 0.2.0.x):
34417 - Fix a bug with AutomapHostsOnResolve that would always cause
34418 the second request to fail. Bug reported by Kate. Bugfix on
34420 - Fix a bug in ADDRMAP controller replies that would sometimes
34421 try to print a NULL. Patch from tup.
34422 - Read v3 directory authority keys from the right location.
34423 - Numerous bugfixes to directory voting code.
34426 Changes in version 0.1.2.16 - 2007-08-01
34427 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
34428 remote attacker in certain situations to rewrite the user's torrc
34429 configuration file. This can completely compromise anonymity of users
34430 in most configurations, including those running the Vidalia bundles,
34431 TorK, etc. Or worse.
34433 o Major security fixes:
34434 - Close immediately after missing authentication on control port;
34435 do not allow multiple authentication attempts.
34438 Changes in version 0.2.0.4-alpha - 2007-08-01
34439 This fourth development snapshot fixes a critical security vulnerability
34440 for most users, specifically those running Vidalia, TorK, etc. Everybody
34441 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
34443 o Major security fixes:
34444 - Close immediately after missing authentication on control port;
34445 do not allow multiple authentication attempts.
34447 o Major bugfixes (compilation):
34448 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
34451 o Minor features (performance):
34452 - Be even more aggressive about releasing RAM from small
34453 empty buffers. Thanks to our free-list code, this shouldn't be too
34454 performance-intensive.
34455 - Disable sentinel-based debugging for buffer code: we squashed all
34456 the bugs that this was supposed to detect a long time ago, and
34457 now its only effect is to change our buffer sizes from nice
34458 powers of two (which platform mallocs tend to like) to values
34459 slightly over powers of two (which make some platform mallocs sad).
34460 - Log malloc statistics from mallinfo() on platforms where it
34464 Changes in version 0.2.0.3-alpha - 2007-07-29
34465 This third development snapshot introduces new experimental
34466 blocking-resistance features and a preliminary version of the v3
34467 directory voting design, and includes many other smaller features
34471 - The first pieces of our "bridge" design for blocking-resistance
34472 are implemented. People can run bridge directory authorities;
34473 people can run bridges; and people can configure their Tor clients
34474 with a set of bridges to use as the first hop into the Tor network.
34475 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
34477 - Create listener connections before we setuid to the configured
34478 User and Group. Now non-Windows users can choose port values
34479 under 1024, start Tor as root, and have Tor bind those ports
34480 before it changes to another UID. (Windows users could already
34482 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
34483 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
34484 on "vserver" accounts. (Patch from coderman.)
34485 - Be even more aggressive about separating local traffic from relayed
34486 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
34488 o Major features (experimental):
34489 - First cut of code for "v3 dir voting": directory authorities will
34490 vote on a common network status document rather than each publishing
34491 their own opinion. This code needs more testing and more corner-case
34492 handling before it's ready for use.
34495 - Directory authorities now call routers Fast if their bandwidth is
34496 at least 100KB/s, and consider their bandwidth adequate to be a
34497 Guard if it is at least 250KB/s, no matter the medians. This fix
34498 complements proposal 107. [Bugfix on 0.1.2.x]
34499 - Directory authorities now never mark more than 3 servers per IP as
34500 Valid and Running. (Implements proposal 109, by Kevin Bauer and
34502 - Minor change to organizationName and commonName generation
34503 procedures in TLS certificates during Tor handshakes, to invalidate
34504 some earlier censorware approaches. This is not a long-term
34505 solution, but applying it will give us a bit of time to look into
34506 the epidemiology of countermeasures as they spread.
34508 o Major bugfixes (directory):
34509 - Rewrite directory tokenization code to never run off the end of
34510 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
34512 o Minor features (controller):
34513 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
34514 match requests to applications. (Patch from Robert Hogan.)
34515 - Report address and port correctly on connections to DNSPort. (Patch
34516 from Robert Hogan.)
34517 - Add a RESOLVE command to launch hostname lookups. (Original patch
34518 from Robert Hogan.)
34519 - Add GETINFO status/enough-dir-info to let controllers tell whether
34520 Tor has downloaded sufficient directory information. (Patch
34522 - You can now use the ControlSocket option to tell Tor to listen for
34523 controller connections on Unix domain sockets on systems that
34524 support them. (Patch from Peter Palfrader.)
34525 - STREAM NEW events are generated for DNSPort requests and for
34526 tunneled directory connections. (Patch from Robert Hogan.)
34527 - New "GETINFO address-mappings/*" command to get address mappings
34528 with expiry information. "addr-mappings/*" is now deprecated.
34531 o Minor features (misc):
34532 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
34534 - The tor-gencert tool for v3 directory authorities now creates all
34535 files as readable to the file creator only, and write-protects
34536 the authority identity key.
34537 - When dumping memory usage, list bytes used in buffer memory
34539 - When running with dmalloc, dump more stats on hup and on exit.
34540 - Directory authorities now fail quickly and (relatively) harmlessly
34541 if they generate a network status document that is somehow
34544 o Traffic load balancing improvements:
34545 - If exit bandwidth ever exceeds one third of total bandwidth, then
34546 use the correct formula to weight exit nodes when choosing paths.
34547 (Based on patch from Mike Perry.)
34548 - Choose perfectly fairly among routers when choosing by bandwidth and
34549 weighting by fraction of bandwidth provided by exits. Previously, we
34550 would choose with only approximate fairness, and correct ourselves
34551 if we ran off the end of the list. [Bugfix on 0.1.2.x]
34553 o Performance improvements:
34554 - Be more aggressive with freeing buffer RAM or putting it on the
34556 - Use Critical Sections rather than Mutexes for synchronizing threads
34557 on win32; Mutexes are heavier-weight, and designed for synchronizing
34560 o Deprecated and removed features:
34561 - RedirectExits is now deprecated.
34562 - Stop allowing address masks that do not correspond to bit prefixes.
34563 We have warned about these for a really long time; now it's time
34564 to reject them. (Patch from croup.)
34566 o Minor bugfixes (directory):
34567 - Fix another crash bug related to extra-info caching. (Bug found by
34568 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
34569 - Directories no longer return a "304 not modified" when they don't
34570 have the networkstatus the client asked for. Also fix a memory
34571 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
34572 - We had accidentally labelled 0.1.2.x directory servers as not
34573 suitable for begin_dir requests, and had labelled no directory
34574 servers as suitable for uploading extra-info documents. [Bugfix
34577 o Minor bugfixes (dns):
34578 - Fix a crash when DNSPort is set more than once. (Patch from Robert
34579 Hogan.) [Bugfix on 0.2.0.2-alpha]
34580 - Add DNSPort connections to the global connection list, so that we
34581 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
34583 - Fix a dangling reference that could lead to a crash when DNSPort is
34584 changed or closed (Patch from Robert Hogan.) [Bugfix on
34587 o Minor bugfixes (controller):
34588 - Provide DNS expiry times in GMT, not in local time. For backward
34589 compatibility, ADDRMAP events only provide GMT expiry in an extended
34590 field. "GETINFO address-mappings" always does the right thing.
34591 - Use CRLF line endings properly in NS events.
34592 - Terminate multi-line control events properly. (Original patch
34593 from tup.) [Bugfix on 0.1.2.x-alpha]
34594 - Do not include spaces in SOURCE_ADDR fields in STREAM
34595 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
34598 Changes in version 0.1.2.15 - 2007-07-17
34599 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
34600 problems, fixes compilation on BSD, and fixes a variety of other
34601 bugs. Everybody should upgrade.
34603 o Major bugfixes (compilation):
34604 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
34606 o Major bugfixes (crashes):
34607 - Try even harder not to dereference the first character after
34608 an mmap(). Reported by lodger.
34609 - Fix a crash bug in directory authorities when we re-number the
34610 routerlist while inserting a new router.
34611 - When the cached-routers file is an even multiple of the page size,
34612 don't run off the end and crash. (Fixes bug 455; based on idea
34614 - Fix eventdns.c behavior on Solaris: It is critical to include
34615 orconfig.h _before_ sys/types.h, so that we can get the expected
34616 definition of _FILE_OFFSET_BITS.
34618 o Major bugfixes (security):
34619 - Fix a possible buffer overrun when using BSD natd support. Bug
34621 - When sending destroy cells from a circuit's origin, don't include
34622 the reason for tearing down the circuit. The spec says we didn't,
34623 and now we actually don't. Reported by lodger.
34624 - Keep streamids from different exits on a circuit separate. This
34625 bug may have allowed other routers on a given circuit to inject
34626 cells into streams. Reported by lodger; fixes bug 446.
34627 - If there's a never-before-connected-to guard node in our list,
34628 never choose any guards past it. This way we don't expand our
34629 guard list unless we need to.
34631 o Minor bugfixes (guard nodes):
34632 - Weight guard selection by bandwidth, so that low-bandwidth nodes
34633 don't get overused as guards.
34635 o Minor bugfixes (directory):
34636 - Correctly count the number of authorities that recommend each
34637 version. Previously, we were under-counting by 1.
34638 - Fix a potential crash bug when we load many server descriptors at
34639 once and some of them make others of them obsolete. Fixes bug 458.
34641 o Minor bugfixes (hidden services):
34642 - Stop tearing down the whole circuit when the user asks for a
34643 connection to a port that the hidden service didn't configure.
34646 o Minor bugfixes (misc):
34647 - On Windows, we were preventing other processes from reading
34648 cached-routers while Tor was running. Reported by janbar.
34649 - Fix a possible (but very unlikely) bug in picking routers by
34650 bandwidth. Add a log message to confirm that it is in fact
34651 unlikely. Patch from lodger.
34652 - Backport a couple of memory leak fixes.
34653 - Backport miscellaneous cosmetic bugfixes.
34656 Changes in version 0.2.0.2-alpha - 2007-06-02
34657 o Major bugfixes on 0.2.0.1-alpha:
34658 - Fix an assertion failure related to servers without extra-info digests.
34659 Resolves bugs 441 and 442.
34661 o Minor features (directory):
34662 - Support "If-Modified-Since" when answering HTTP requests for
34663 directories, running-routers documents, and network-status documents.
34664 (There's no need to support it for router descriptors, since those
34665 are downloaded by descriptor digest.)
34667 o Minor build issues:
34668 - Clear up some MIPSPro compiler warnings.
34669 - When building from a tarball on a machine that happens to have SVK
34670 installed, report the micro-revision as whatever version existed
34671 in the tarball, not as "x".
34674 Changes in version 0.2.0.1-alpha - 2007-06-01
34675 This early development snapshot provides new features for people running
34676 Tor as both a client and a server (check out the new RelayBandwidth
34677 config options); lets Tor run as a DNS proxy; and generally moves us
34678 forward on a lot of fronts.
34680 o Major features, server usability:
34681 - New config options RelayBandwidthRate and RelayBandwidthBurst:
34682 a separate set of token buckets for relayed traffic. Right now
34683 relayed traffic is defined as answers to directory requests, and
34684 OR connections that don't have any local circuits on them.
34686 o Major features, client usability:
34687 - A client-side DNS proxy feature to replace the need for
34688 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
34689 for DNS requests on port 9999, use the Tor network to resolve them
34690 anonymously, and send the reply back like a regular DNS server.
34691 The code still only implements a subset of DNS.
34692 - Make PreferTunneledDirConns and TunnelDirConns work even when
34693 we have no cached directory info. This means Tor clients can now
34694 do all of their connections protected by TLS.
34696 o Major features, performance and efficiency:
34697 - Directory authorities accept and serve "extra info" documents for
34698 routers. These documents contain fields from router descriptors
34699 that aren't usually needed, and that use a lot of excess
34700 bandwidth. Once these fields are removed from router descriptors,
34701 the bandwidth savings should be about 60%. [Partially implements
34703 - Servers upload extra-info documents to any authority that accepts
34704 them. Authorities (and caches that have been configured to download
34705 extra-info documents) download them as needed. [Partially implements
34707 - Change the way that Tor buffers data that it is waiting to write.
34708 Instead of queueing data cells in an enormous ring buffer for each
34709 client->OR or OR->OR connection, we now queue cells on a separate
34710 queue for each circuit. This lets us use less slack memory, and
34711 will eventually let us be smarter about prioritizing different kinds
34713 - Use memory pools to allocate cells with better speed and memory
34714 efficiency, especially on platforms where malloc() is inefficient.
34715 - Stop reading on edge connections when their corresponding circuit
34716 buffers are full; start again as the circuits empty out.
34718 o Major features, other:
34719 - Add an HSAuthorityRecordStats option that hidden service authorities
34720 can use to track statistics of overall hidden service usage without
34721 logging information that would be very useful to an attacker.
34722 - Start work implementing multi-level keys for directory authorities:
34723 Add a standalone tool to generate key certificates. (Proposal 103.)
34726 - Directory authorities now call routers Stable if they have an
34727 uptime of at least 30 days, even if that's not the median uptime
34728 in the network. Implements proposal 107, suggested by Kevin Bauer
34731 o Minor fixes (resource management):
34732 - Count the number of open sockets separately from the number
34733 of active connection_t objects. This will let us avoid underusing
34734 our allocated connection limit.
34735 - We no longer use socket pairs to link an edge connection to an
34736 anonymous directory connection or a DirPort test connection.
34737 Instead, we track the link internally and transfer the data
34738 in-process. This saves two sockets per "linked" connection (at the
34739 client and at the server), and avoids the nasty Windows socketpair()
34741 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
34742 for every single inactive connection_t. Free items from the
34743 4k/16k-buffer free lists when they haven't been used for a while.
34745 o Minor features (build):
34746 - Make autoconf search for libevent, openssl, and zlib consistently.
34747 - Update deprecated macros in configure.in.
34748 - When warning about missing headers, tell the user to let us
34749 know if the compile succeeds anyway, so we can downgrade the
34751 - Include the current subversion revision as part of the version
34752 string: either fetch it directly if we're in an SVN checkout, do
34753 some magic to guess it if we're in an SVK checkout, or use
34754 the last-detected version if we're building from a .tar.gz.
34755 Use this version consistently in log messages.
34757 o Minor features (logging):
34758 - Always prepend "Bug: " to any log message about a bug.
34759 - Put a platform string (e.g. "Linux i686") in the startup log
34760 message, so when people paste just their logs, we know if it's
34761 OpenBSD or Windows or what.
34762 - When logging memory usage, break down memory used in buffers by
34765 o Minor features (directory system):
34766 - New config option V2AuthoritativeDirectory that all directory
34767 authorities should set. This will let future authorities choose
34768 not to serve V2 directory information.
34769 - Directory authorities allow multiple router descriptors and/or extra
34770 info documents to be uploaded in a single go. This will make
34771 implementing proposal 104 simpler.
34773 o Minor features (controller):
34774 - Add a new config option __DisablePredictedCircuits designed for
34775 use by the controller, when we don't want Tor to build any circuits
34777 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
34778 so we can exit from the middle of the circuit.
34779 - Implement "getinfo status/circuit-established".
34780 - Implement "getinfo status/version/..." so a controller can tell
34781 whether the current version is recommended, and whether any versions
34782 are good, and how many authorities agree. (Patch from shibz.)
34784 o Minor features (hidden services):
34785 - Allow multiple HiddenServicePort directives with the same virtual
34786 port; when they occur, the user is sent round-robin to one
34787 of the target ports chosen at random. Partially fixes bug 393 by
34788 adding limited ad-hoc round-robining.
34790 o Minor features (other):
34792 - Add a new AutomapHostsOnResolve option: when it is enabled, any
34793 resolve request for hosts matching a given pattern causes Tor to
34794 generate an internal virtual address mapping for that host. This
34795 allows DNSPort to work sensibly with hidden service users. By
34796 default, .exit and .onion addresses are remapped; the list of
34797 patterns can be reconfigured with AutomapHostsSuffixes.
34798 - Add an "-F" option to tor-resolve to force a resolve for a .onion
34799 address. Thanks to the AutomapHostsOnResolve option, this is no
34800 longer a completely silly thing to do.
34801 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
34802 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
34803 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
34804 minus 1 byte: the actual maximum declared bandwidth.
34806 o Removed features:
34807 - Removed support for the old binary "version 0" controller protocol.
34808 This has been deprecated since 0.1.1, and warnings have been issued
34809 since 0.1.2. When we encounter a v0 control message, we now send
34810 back an error and close the connection.
34811 - Remove the old "dns worker" server DNS code: it hasn't been default
34812 since 0.1.2.2-alpha, and all the servers seem to be using the new
34815 o Minor bugfixes (portability):
34816 - Even though Windows is equally happy with / and \ as path separators,
34817 try to use \ consistently on Windows and / consistently on Unix: it
34818 makes the log messages nicer.
34819 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
34820 - Read resolv.conf files correctly on platforms where read() returns
34821 partial results on small file reads.
34823 o Minor bugfixes (directory):
34824 - Correctly enforce that elements of directory objects do not appear
34825 more often than they are allowed to appear.
34826 - When we are reporting the DirServer line we just parsed, we were
34827 logging the second stanza of the key fingerprint, not the first.
34829 o Minor bugfixes (logging):
34830 - When we hit an EOF on a log (probably because we're shutting down),
34831 don't try to remove the log from the list: just mark it as
34832 unusable. (Bulletproofs against bug 222.)
34834 o Minor bugfixes (other):
34835 - In the exitlist script, only consider the most recently published
34836 server descriptor for each server. Also, when the user requests
34837 a list of servers that _reject_ connections to a given address,
34838 explicitly exclude the IPs that also have servers that accept
34839 connections to that address. (Resolves bug 405.)
34840 - Stop allowing hibernating servers to be "stable" or "fast".
34841 - On Windows, we were preventing other processes from reading
34842 cached-routers while Tor was running. (Reported by janbar)
34843 - Make the NodeFamilies config option work. (Reported by
34844 lodger -- it has never actually worked, even though we added it
34846 - Check return values from pthread_mutex functions.
34847 - Don't save non-general-purpose router descriptors to the disk cache,
34848 because we have no way of remembering what their purpose was when
34850 - Add even more asserts to hunt down bug 417.
34851 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
34852 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
34853 Add a log message to confirm that it is in fact unlikely.
34855 o Minor bugfixes (controller):
34856 - Make 'getinfo fingerprint' return a 551 error if we're not a
34857 server, so we match what the control spec claims we do. Reported
34859 - Fix a typo in an error message when extendcircuit fails that
34860 caused us to not follow the \r\n-based delimiter protocol. Reported
34863 o Code simplifications and refactoring:
34864 - Stop passing around circuit_t and crypt_path_t pointers that are
34865 implicit in other procedure arguments.
34866 - Drop the old code to choke directory connections when the
34867 corresponding OR connections got full: thanks to the cell queue
34868 feature, OR conns don't get full any more.
34869 - Make dns_resolve() handle attaching connections to circuits
34870 properly, so the caller doesn't have to.
34871 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
34872 - Keep the connection array as a dynamic smartlist_t, rather than as
34873 a fixed-sized array. This is important, as the number of connections
34874 is becoming increasingly decoupled from the number of sockets.
34877 Changes in version 0.1.2.14 - 2007-05-25
34878 Tor 0.1.2.14 changes the addresses of two directory authorities (this
34879 change especially affects those who serve or use hidden services),
34880 and fixes several other crash- and security-related bugs.
34882 o Directory authority changes:
34883 - Two directory authorities (moria1 and moria2) just moved to new
34884 IP addresses. This change will particularly affect those who serve
34885 or use hidden services.
34887 o Major bugfixes (crashes):
34888 - If a directory server runs out of space in the connection table
34889 as it's processing a begin_dir request, it will free the exit stream
34890 but leave it attached to the circuit, leading to unpredictable
34891 behavior. (Reported by seeess, fixes bug 425.)
34892 - Fix a bug in dirserv_remove_invalid() that would cause authorities
34893 to corrupt memory under some really unlikely scenarios.
34894 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
34895 - Avoid segfaults when reading from mmaped descriptor file. (Reported
34898 o Major bugfixes (security):
34899 - When choosing an entry guard for a circuit, avoid using guards
34900 that are in the same family as the chosen exit -- not just guards
34901 that are exactly the chosen exit. (Reported by lodger.)
34903 o Major bugfixes (resource management):
34904 - If a directory authority is down, skip it when deciding where to get
34905 networkstatus objects or descriptors. Otherwise we keep asking
34906 every 10 seconds forever. Fixes bug 384.
34907 - Count it as a failure if we fetch a valid network-status but we
34908 don't want to keep it. Otherwise we'll keep fetching it and keep
34909 not wanting to keep it. Fixes part of bug 422.
34910 - If all of our dirservers have given us bad or no networkstatuses
34911 lately, then stop hammering them once per minute even when we
34912 think they're failed. Fixes another part of bug 422.
34915 - Actually set the purpose correctly for descriptors inserted with
34916 purpose=controller.
34917 - When we have k non-v2 authorities in our DirServer config,
34918 we ignored the last k authorities in the list when updating our
34920 - Correctly back-off from requesting router descriptors that we are
34921 having a hard time downloading.
34922 - Read resolv.conf files correctly on platforms where read() returns
34923 partial results on small file reads.
34924 - Don't rebuild the entire router store every time we get 32K of
34925 routers: rebuild it when the journal gets very large, or when
34926 the gaps in the store get very large.
34929 - When routers publish SVN revisions in their router descriptors,
34930 authorities now include those versions correctly in networkstatus
34932 - Warn when using a version of libevent before 1.3b to run a server on
34933 OSX or BSD: these versions interact badly with userspace threads.
34936 Changes in version 0.1.2.13 - 2007-04-24
34937 This release features some major anonymity fixes, such as safer path
34938 selection; better client performance; faster bootstrapping, better
34939 address detection, and better DNS support for servers; write limiting as
34940 well as read limiting to make servers easier to run; and a huge pile of
34941 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
34943 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
34944 of the Freenode IRC network, remembering his patience and vision for
34945 free speech on the Internet.
34948 - Fix a memory leak when we ask for "all" networkstatuses and we
34949 get one we don't recognize.
34950 - Add more asserts to hunt down bug 417.
34951 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
34954 Changes in version 0.1.2.12-rc - 2007-03-16
34956 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
34957 directory information requested inside Tor connections (i.e. via
34958 begin_dir cells). It only triggered when the same connection was
34959 serving other data at the same time. Reported by seeess.
34962 - When creating a circuit via the controller, send a 'launched'
34963 event when we're done, so we follow the spec better.
34966 Changes in version 0.1.2.11-rc - 2007-03-15
34967 o Minor bugfixes (controller), reported by daejees:
34968 - Correct the control spec to match how the code actually responds
34969 to 'getinfo addr-mappings/*'.
34970 - The control spec described a GUARDS event, but the code
34971 implemented a GUARD event. Standardize on GUARD, but let people
34972 ask for GUARDS too.
34975 Changes in version 0.1.2.10-rc - 2007-03-07
34976 o Major bugfixes (Windows):
34977 - Do not load the NT services library functions (which may not exist)
34978 just to detect if we're a service trying to shut down. Now we run
34979 on Win98 and friends again.
34981 o Minor bugfixes (other):
34982 - Clarify a couple of log messages.
34983 - Fix a misleading socks5 error number.
34986 Changes in version 0.1.2.9-rc - 2007-03-02
34987 o Major bugfixes (Windows):
34988 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
34989 of the usual GCC "%llu". This prevents a bug when saving 64-bit
34990 int configuration values: the high-order 32 bits would get
34991 truncated. In particular, we were being bitten by the default
34992 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
34993 and maybe also bug 397.)
34995 o Minor bugfixes (performance):
34996 - Use OpenSSL's AES implementation on platforms where it's faster.
34997 This could save us as much as 10% CPU usage.
34999 o Minor bugfixes (server):
35000 - Do not rotate onion key immediately after setting it for the first
35003 o Minor bugfixes (directory authorities):
35004 - Stop calling servers that have been hibernating for a long time
35005 "stable". Also, stop letting hibernating or obsolete servers affect
35006 uptime and bandwidth cutoffs.
35007 - Stop listing hibernating servers in the v1 directory.
35009 o Minor bugfixes (hidden services):
35010 - Upload hidden service descriptors slightly less often, to reduce
35011 load on authorities.
35013 o Minor bugfixes (other):
35014 - Fix an assert that could trigger if a controller quickly set then
35015 cleared EntryNodes. Bug found by Udo van den Heuvel.
35016 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
35018 - Fix a potential race condition in the rpm installer. Found by
35020 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
35021 of 2 as indicating that the server is completely bad; it sometimes
35022 means that the server is just bad for the request in question. (may fix
35023 the last of bug 326.)
35024 - Disable encrypted directory connections when we don't have a server
35025 descriptor for the destination. We'll get this working again in
35029 Changes in version 0.1.2.8-beta - 2007-02-26
35030 o Major bugfixes (crashes):
35031 - Stop crashing when the controller asks us to resetconf more than
35032 one config option at once. (Vidalia 0.0.11 does this.)
35033 - Fix a crash that happened on Win98 when we're given command-line
35034 arguments: don't try to load NT service functions from advapi32.dll
35035 except when we need them. (Bug introduced in 0.1.2.7-alpha;
35037 - Fix a longstanding obscure crash bug that could occur when
35038 we run out of DNS worker processes. (Resolves bug 390.)
35040 o Major bugfixes (hidden services):
35041 - Correctly detect whether hidden service descriptor downloads are
35042 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
35044 o Major bugfixes (accounting):
35045 - When we start during an accounting interval before it's time to wake
35046 up, remember to wake up at the correct time. (May fix bug 342.)
35048 o Minor bugfixes (controller):
35049 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
35050 clear the corresponding on_circuit variable, and remember later
35051 that we don't need to send a redundant CLOSED event. Resolves part
35053 - Report events where a resolve succeeded or where we got a socks
35054 protocol error correctly, rather than calling both of them
35056 - Change reported stream target addresses to IP consistently when
35057 we finally get the IP from an exit node.
35058 - Send log messages to the controller even if they happen to be very
35061 o Minor bugfixes (other):
35062 - Display correct results when reporting which versions are
35063 recommended, and how recommended they are. (Resolves bug 383.)
35064 - Improve our estimates for directory bandwidth to be less random:
35065 guess that an unrecognized directory will have the average bandwidth
35066 from all known directories, not that it will have the average
35067 bandwidth from those directories earlier than it on the list.
35068 - If we start a server with ClientOnly 1, then set ClientOnly to 0
35069 and hup, stop triggering an assert based on an empty onion_key.
35070 - On platforms with no working mmap() equivalent, don't warn the
35071 user when cached-routers doesn't exist.
35072 - Warn the user when mmap() [or its equivalent] fails for some reason
35073 other than file-not-found.
35074 - Don't warn the user when cached-routers.new doesn't exist: that's
35075 perfectly fine when starting up for the first time.
35076 - When EntryNodes are configured, rebuild the guard list to contain,
35077 in order: the EntryNodes that were guards before; the rest of the
35078 EntryNodes; the nodes that were guards before.
35079 - Mask out all signals in sub-threads; only the libevent signal
35080 handler should be processing them. This should prevent some crashes
35081 on some machines using pthreads. (Patch from coderman.)
35082 - Fix switched arguments on memset in the implementation of
35083 tor_munmap() for systems with no mmap() call.
35084 - When Tor receives a router descriptor that it asked for, but
35085 no longer wants (because it has received fresh networkstatuses
35086 in the meantime), do not warn the user. Cache the descriptor if
35087 we're a cache; drop it if we aren't.
35088 - Make earlier entry guards _really_ get retried when the network
35090 - On a malformed DNS reply, always give an error to the corresponding
35092 - Build with recent libevents on platforms that do not define the
35093 nonstandard types "u_int8_t" and friends.
35095 o Minor features (controller):
35096 - Warn the user when an application uses the obsolete binary v0
35097 control protocol. We're planning to remove support for it during
35098 the next development series, so it's good to give people some
35100 - Add STREAM_BW events to report per-entry-stream bandwidth
35101 use. (Patch from Robert Hogan.)
35102 - Rate-limit SIGNEWNYM signals in response to controllers that
35103 impolitely generate them for every single stream. (Patch from
35104 mwenge; closes bug 394.)
35105 - Make REMAP stream events have a SOURCE (cache or exit), and
35106 make them generated in every case where we get a successful
35107 connected or resolved cell.
35109 o Minor bugfixes (performance):
35110 - Call router_have_min_dir_info half as often. (This is showing up in
35111 some profiles, but not others.)
35112 - When using GCC, make log_debug never get called at all, and its
35113 arguments never get evaluated, when no debug logs are configured.
35114 (This is showing up in some profiles, but not others.)
35117 - Remove some never-implemented options. Mark PathlenCoinWeight as
35119 - Implement proposal 106: Stop requiring clients to have well-formed
35120 certificates; stop checking nicknames in certificates. (Clients
35121 have certificates so that they can look like Tor servers, but in
35122 the future we might want to allow them to look like regular TLS
35123 clients instead. Nicknames in certificates serve no purpose other
35124 than making our protocol easier to recognize on the wire.)
35125 - Revise messages on handshake failure again to be even more clear about
35126 which are incoming connections and which are outgoing.
35127 - Discard any v1 directory info that's over 1 month old (for
35128 directories) or over 1 week old (for running-routers lists).
35129 - Do not warn when individual nodes in the configuration's EntryNodes,
35130 ExitNodes, etc are down: warn only when all possible nodes
35131 are down. (Fixes bug 348.)
35132 - Always remove expired routers and networkstatus docs before checking
35133 whether we have enough information to build circuits. (Fixes
35135 - Put a lower-bound on MaxAdvertisedBandwidth.
35138 Changes in version 0.1.2.7-alpha - 2007-02-06
35139 o Major bugfixes (rate limiting):
35140 - Servers decline directory requests much more aggressively when
35141 they're low on bandwidth. Otherwise they end up queueing more and
35142 more directory responses, which can't be good for latency.
35143 - But never refuse directory requests from local addresses.
35144 - Fix a memory leak when sending a 503 response for a networkstatus
35146 - Be willing to read or write on local connections (e.g. controller
35147 connections) even when the global rate limiting buckets are empty.
35148 - If our system clock jumps back in time, don't publish a negative
35149 uptime in the descriptor. Also, don't let the global rate limiting
35150 buckets go absurdly negative.
35151 - Flush local controller connection buffers periodically as we're
35152 writing to them, so we avoid queueing 4+ megabytes of data before
35155 o Major bugfixes (NT services):
35156 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
35157 command-line flag so that admins can override the default by saying
35158 "tor --service install --user "SomeUser"". This will not affect
35159 existing installed services. Also, warn the user that the service
35160 will look for its configuration file in the service user's
35161 %appdata% directory. (We can't do the 'hardwire the user's appdata
35162 directory' trick any more, since we may not have read access to that
35165 o Major bugfixes (other):
35166 - Previously, we would cache up to 16 old networkstatus documents
35167 indefinitely, if they came from nontrusted authorities. Now we
35168 discard them if they are more than 10 days old.
35169 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
35171 - Detect and reject malformed DNS responses containing circular
35173 - If exits are rare enough that we're not marking exits as guards,
35174 ignore exit bandwidth when we're deciding the required bandwidth
35176 - When we're handling a directory connection tunneled over Tor,
35177 don't fill up internal memory buffers with all the data we want
35178 to tunnel; instead, only add it if the OR connection that will
35179 eventually receive it has some room for it. (This can lead to
35180 slowdowns in tunneled dir connections; a better solution will have
35181 to wait for 0.2.0.)
35183 o Minor bugfixes (dns):
35184 - Add some defensive programming to eventdns.c in an attempt to catch
35185 possible memory-stomping bugs.
35186 - Detect and reject DNS replies containing IPv4 or IPv6 records with
35187 an incorrect number of bytes. (Previously, we would ignore the
35189 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
35190 in the correct order, and doesn't crash.
35191 - Free memory held in recently-completed DNS lookup attempts on exit.
35192 This was not a memory leak, but may have been hiding memory leaks.
35193 - Handle TTL values correctly on reverse DNS lookups.
35194 - Treat failure to parse resolv.conf as an error.
35196 o Minor bugfixes (other):
35197 - Fix crash with "tor --list-fingerprint" (reported by seeess).
35198 - When computing clock skew from directory HTTP headers, consider what
35199 time it was when we finished asking for the directory, not what
35201 - Expire socks connections if they spend too long waiting for the
35202 handshake to finish. Previously we would let them sit around for
35203 days, if the connecting application didn't close them either.
35204 - And if the socks handshake hasn't started, don't send a
35205 "DNS resolve socks failed" handshake reply; just close it.
35206 - Stop using C functions that OpenBSD's linker doesn't like.
35207 - Don't launch requests for descriptors unless we have networkstatuses
35208 from at least half of the authorities. This delays the first
35209 download slightly under pathological circumstances, but can prevent
35210 us from downloading a bunch of descriptors we don't need.
35211 - Do not log IPs with TLS failures for incoming TLS
35212 connections. (Fixes bug 382.)
35213 - If the user asks to use invalid exit nodes, be willing to use
35215 - Stop using the reserved ac_cv namespace in our configure script.
35216 - Call stat() slightly less often; use fstat() when possible.
35217 - Refactor the way we handle pending circuits when an OR connection
35218 completes or fails, in an attempt to fix a rare crash bug.
35219 - Only rewrite a conn's address based on X-Forwarded-For: headers
35220 if it's a parseable public IP address; and stop adding extra quotes
35221 to the resulting address.
35224 - Weight directory requests by advertised bandwidth. Now we can
35225 let servers enable write limiting but still allow most clients to
35226 succeed at their directory requests. (We still ignore weights when
35227 choosing a directory authority; I hope this is a feature.)
35230 - Create a new file ReleaseNotes which was the old ChangeLog. The
35231 new ChangeLog file now includes the summaries for all development
35233 - Check for addresses with invalid characters at the exit as well
35234 as at the client, and warn less verbosely when they fail. You can
35235 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
35236 - Adapt a patch from goodell to let the contrib/exitlist script
35237 take arguments rather than require direct editing.
35238 - Inform the server operator when we decide not to advertise a
35239 DirPort due to AccountingMax enabled or a low BandwidthRate. It
35240 was confusing Zax, so now we're hopefully more helpful.
35241 - Bring us one step closer to being able to establish an encrypted
35242 directory tunnel without knowing a descriptor first. Still not
35243 ready yet. As part of the change, now assume we can use a
35244 create_fast cell if we don't know anything about a router.
35245 - Allow exit nodes to use nameservers running on ports other than 53.
35246 - Servers now cache reverse DNS replies.
35247 - Add an --ignore-missing-torrc command-line option so that we can
35248 get the "use sensible defaults if the configuration file doesn't
35249 exist" behavior even when specifying a torrc location on the command
35252 o Minor features (controller):
35253 - Track reasons for OR connection failure; make these reasons
35254 available via the controller interface. (Patch from Mike Perry.)
35255 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
35256 can learn when clients are sending malformed hostnames to Tor.
35257 - Clean up documentation for controller status events.
35258 - Add a REMAP status to stream events to note that a stream's
35259 address has changed because of a cached address or a MapAddress
35263 Changes in version 0.1.2.6-alpha - 2007-01-09
35265 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
35266 connection handles more than 4 gigs in either direction, we crash.
35267 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
35268 advertised exit node, somebody might try to exit from us when
35269 we're bootstrapping and before we've built our descriptor yet.
35270 Refuse the connection rather than crashing.
35273 - Warn if we (as a server) find that we've resolved an address that we
35274 weren't planning to resolve.
35275 - Warn that using select() on any libevent version before 1.1 will be
35276 unnecessarily slow (even for select()).
35277 - Flush ERR-level controller status events just like we currently
35278 flush ERR-level log events, so that a Tor shutdown doesn't prevent
35279 the controller from learning about current events.
35281 o Minor features (more controller status events):
35282 - Implement EXTERNAL_ADDRESS server status event so controllers can
35283 learn when our address changes.
35284 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
35285 can learn when directories reject our descriptor.
35286 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
35287 can learn when a client application is speaking a non-socks protocol
35289 - Implement DANGEROUS_SOCKS client status event so controllers
35290 can learn when a client application is leaking DNS addresses.
35291 - Implement BUG general status event so controllers can learn when
35292 Tor is unhappy about its internal invariants.
35293 - Implement CLOCK_SKEW general status event so controllers can learn
35294 when Tor thinks the system clock is set incorrectly.
35295 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
35296 server status events so controllers can learn when their descriptors
35297 are accepted by a directory.
35298 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
35299 server status events so controllers can learn about Tor's progress in
35300 deciding whether it's reachable from the outside.
35301 - Implement BAD_LIBEVENT general status event so controllers can learn
35302 when we have a version/method combination in libevent that needs to
35304 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
35305 and DNS_USELESS server status events so controllers can learn
35306 about changes to DNS server status.
35308 o Minor features (directory):
35309 - Authorities no longer recommend exits as guards if this would shift
35310 too much load to the exit nodes.
35313 Changes in version 0.1.2.5-alpha - 2007-01-06
35315 - Enable write limiting as well as read limiting. Now we sacrifice
35316 capacity if we're pushing out lots of directory traffic, rather
35317 than overrunning the user's intended bandwidth limits.
35318 - Include TLS overhead when counting bandwidth usage; previously, we
35319 would count only the bytes sent over TLS, but not the bytes used
35321 - Support running the Tor service with a torrc not in the same
35322 directory as tor.exe and default to using the torrc located in
35323 the %appdata%\Tor\ of the user who installed the service. Patch
35325 - Servers now check for the case when common DNS requests are going to
35326 wildcarded addresses (i.e. all getting the same answer), and change
35327 their exit policy to reject *:* if it's happening.
35328 - Implement BEGIN_DIR cells, so we can connect to the directory
35329 server via TLS to do encrypted directory requests rather than
35330 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
35331 config options if you like.
35333 o Minor features (config and docs):
35334 - Start using the state file to store bandwidth accounting data:
35335 the bw_accounting file is now obsolete. We'll keep generating it
35336 for a while for people who are still using 0.1.2.4-alpha.
35337 - Try to batch changes to the state file so that we do as few
35338 disk writes as possible while still storing important things in
35340 - The state file and the bw_accounting file get saved less often when
35341 the AvoidDiskWrites config option is set.
35342 - Make PIDFile work on Windows (untested).
35343 - Add internal descriptions for a bunch of configuration options:
35344 accessible via controller interface and in comments in saved
35346 - Reject *:563 (NNTPS) in the default exit policy. We already reject
35347 NNTP by default, so this seems like a sensible addition.
35348 - Clients now reject hostnames with invalid characters. This should
35349 avoid some inadvertent info leaks. Add an option
35350 AllowNonRFC953Hostnames to disable this behavior, in case somebody
35351 is running a private network with hosts called @, !, and #.
35352 - Add a maintainer script to tell us which options are missing
35353 documentation: "make check-docs".
35354 - Add a new address-spec.txt document to describe our special-case
35355 addresses: .exit, .onion, and .noconnnect.
35357 o Minor features (DNS):
35358 - Ongoing work on eventdns infrastructure: now it has dns server
35359 and ipv6 support. One day Tor will make use of it.
35360 - Add client-side caching for reverse DNS lookups.
35361 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
35362 - When we change nameservers or IP addresses, reset and re-launch
35363 our tests for DNS hijacking.
35365 o Minor features (directory):
35366 - Authorities now specify server versions in networkstatus. This adds
35367 about 2% to the size of compressed networkstatus docs, and allows
35368 clients to tell which servers support BEGIN_DIR and which don't.
35369 The implementation is forward-compatible with a proposed future
35370 protocol version scheme not tied to Tor versions.
35371 - DirServer configuration lines now have an orport= option so
35372 clients can open encrypted tunnels to the authorities without
35373 having downloaded their descriptors yet. Enabled for moria1,
35374 moria2, tor26, and lefkada now in the default configuration.
35375 - Directory servers are more willing to send a 503 "busy" if they
35376 are near their write limit, especially for v1 directory requests.
35377 Now they can use their limited bandwidth for actual Tor traffic.
35378 - Clients track responses with status 503 from dirservers. After a
35379 dirserver has given us a 503, we try not to use it until an hour has
35380 gone by, or until we have no dirservers that haven't given us a 503.
35381 - When we get a 503 from a directory, and we're not a server, we don't
35382 count the failure against the total number of failures allowed
35383 for the thing we're trying to download.
35384 - Report X-Your-Address-Is correctly from tunneled directory
35385 connections; don't report X-Your-Address-Is when it's an internal
35386 address; and never believe reported remote addresses when they're
35388 - Protect against an unlikely DoS attack on directory servers.
35389 - Add a BadDirectory flag to network status docs so that authorities
35390 can (eventually) tell clients about caches they believe to be
35393 o Minor features (controller):
35394 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
35395 - Reimplement GETINFO so that info/names stays in sync with the
35397 - Implement "GETINFO fingerprint".
35398 - Implement "SETEVENTS GUARD" so controllers can get updates on
35399 entry guard status as it changes.
35401 o Minor features (clean up obsolete pieces):
35402 - Remove some options that have been deprecated since at least
35403 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
35404 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
35405 to set log options.
35406 - We no longer look for identity and onion keys in "identity.key" and
35407 "onion.key" -- these were replaced by secret_id_key and
35408 secret_onion_key in 0.0.8pre1.
35409 - We no longer require unrecognized directory entries to be
35412 o Major bugfixes (security):
35413 - Stop sending the HttpProxyAuthenticator string to directory
35414 servers when directory connections are tunnelled through Tor.
35415 - Clients no longer store bandwidth history in the state file.
35416 - Do not log introduction points for hidden services if SafeLogging
35418 - When generating bandwidth history, round down to the nearest
35419 1k. When storing accounting data, round up to the nearest 1k.
35420 - When we're running as a server, remember when we last rotated onion
35421 keys, so that we will rotate keys once they're a week old even if
35422 we never stay up for a week ourselves.
35424 o Major bugfixes (other):
35425 - Fix a longstanding bug in eventdns that prevented the count of
35426 timed-out resolves from ever being reset. This bug caused us to
35427 give up on a nameserver the third time it timed out, and try it
35428 10 seconds later... and to give up on it every time it timed out
35430 - Take out the '5 second' timeout from the connection retry
35431 schedule. Now the first connect attempt will wait a full 10
35432 seconds before switching to a new circuit. Perhaps this will help
35433 a lot. Based on observations from Mike Perry.
35434 - Fix a bug on the Windows implementation of tor_mmap_file() that
35435 would prevent the cached-routers file from ever loading. Reported
35439 - Fix an assert failure when a directory authority sets
35440 AuthDirRejectUnlisted and then receives a descriptor from an
35441 unlisted router. Reported by seeess.
35442 - Avoid a double-free when parsing malformed DirServer lines.
35443 - Fix a bug when a BSD-style PF socket is first used. Patch from
35445 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
35446 to resolve an address at a given exit node even when they ask for
35448 - Servers no longer ever list themselves in their "family" line,
35449 even if configured to do so. This makes it easier to configure
35450 family lists conveniently.
35451 - When running as a server, don't fall back to 127.0.0.1 when no
35452 nameservers are configured in /etc/resolv.conf; instead, make the
35453 user fix resolv.conf or specify nameservers explicitly. (Resolves
35455 - Stop accepting certain malformed ports in configured exit policies.
35456 - Don't re-write the fingerprint file every restart, unless it has
35458 - Stop warning when a single nameserver fails: only warn when _all_ of
35459 our nameservers have failed. Also, when we only have one nameserver,
35460 raise the threshold for deciding that the nameserver is dead.
35461 - Directory authorities now only decide that routers are reachable
35462 if their identity keys are as expected.
35463 - When the user uses bad syntax in the Log config line, stop
35464 suggesting other bad syntax as a replacement.
35465 - Correctly detect ipv6 DNS capability on OpenBSD.
35467 o Minor bugfixes (controller):
35468 - Report the circuit number correctly in STREAM CLOSED events. Bug
35469 reported by Mike Perry.
35470 - Do not report bizarre values for results of accounting GETINFOs
35471 when the last second's write or read exceeds the allotted bandwidth.
35472 - Report "unrecognized key" rather than an empty string when the
35473 controller tries to fetch a networkstatus that doesn't exist.
35476 Changes in version 0.1.1.26 - 2006-12-14
35477 o Security bugfixes:
35478 - Stop sending the HttpProxyAuthenticator string to directory
35479 servers when directory connections are tunnelled through Tor.
35480 - Clients no longer store bandwidth history in the state file.
35481 - Do not log introduction points for hidden services if SafeLogging
35485 - Fix an assert failure when a directory authority sets
35486 AuthDirRejectUnlisted and then receives a descriptor from an
35487 unlisted router (reported by seeess).
35490 Changes in version 0.1.2.4-alpha - 2006-12-03
35492 - Add support for using natd; this allows FreeBSDs earlier than
35493 5.1.2 to have ipfw send connections through Tor without using
35494 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
35497 - Make all connections to addresses of the form ".noconnect"
35498 immediately get closed. This lets application/controller combos
35499 successfully test whether they're talking to the same Tor by
35500 watching for STREAM events.
35501 - Make cross.sh cross-compilation script work even when autogen.sh
35502 hasn't been run. (Patch from Michael Mohr.)
35503 - Statistics dumped by -USR2 now include a breakdown of public key
35504 operations, for profiling.
35507 - Fix a major leak when directory authorities parse their
35508 approved-routers list, a minor memory leak when we fail to pick
35509 an exit node, and a few rare leaks on errors.
35510 - Handle TransPort connections even when the server sends data before
35511 the client sends data. Previously, the connection would just hang
35512 until the client sent data. (Patch from tup based on patch from
35514 - Avoid assert failure when our cached-routers file is empty on
35518 - Don't log spurious warnings when we see a circuit close reason we
35519 don't recognize; it's probably just from a newer version of Tor.
35520 - Have directory authorities allow larger amounts of drift in uptime
35521 without replacing the server descriptor: previously, a server that
35522 restarted every 30 minutes could have 48 "interesting" descriptors
35524 - Start linking to the Tor specification and Tor reference manual
35525 correctly in the Windows installer.
35526 - Add Vidalia to the OS X uninstaller script, so when we uninstall
35527 Tor/Privoxy we also uninstall Vidalia.
35528 - Resume building on Irix64, and fix a lot of warnings from its
35529 MIPSpro C compiler.
35530 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
35531 when we're running as a client.
35534 Changes in version 0.1.1.25 - 2006-11-04
35536 - When a client asks us to resolve (rather than connect to)
35537 an address, and we have a cached answer, give them the cached
35538 answer. Previously, we would give them no answer at all.
35539 - We were building exactly the wrong circuits when we predict
35540 hidden service requirements, meaning Tor would have to build all
35541 its circuits on demand.
35542 - If none of our live entry guards have a high uptime, but we
35543 require a guard with a high uptime, try adding a new guard before
35544 we give up on the requirement. This patch should make long-lived
35545 connections more stable on average.
35546 - When testing reachability of our DirPort, don't launch new
35547 tests when there's already one in progress -- unreachable
35548 servers were stacking up dozens of testing streams.
35550 o Security bugfixes:
35551 - When the user sends a NEWNYM signal, clear the client-side DNS
35552 cache too. Otherwise we continue to act on previous information.
35555 - Avoid a memory corruption bug when creating a hash table for
35557 - Avoid possibility of controller-triggered crash when misusing
35558 certain commands from a v0 controller on platforms that do not
35559 handle printf("%s",NULL) gracefully.
35560 - Avoid infinite loop on unexpected controller input.
35561 - Don't log spurious warnings when we see a circuit close reason we
35562 don't recognize; it's probably just from a newer version of Tor.
35563 - Add Vidalia to the OS X uninstaller script, so when we uninstall
35564 Tor/Privoxy we also uninstall Vidalia.
35567 Changes in version 0.1.2.3-alpha - 2006-10-29
35569 - Prepare for servers to publish descriptors less often: never
35570 discard a descriptor simply for being too old until either it is
35571 recommended by no authorities, or until we get a better one for
35572 the same router. Make caches consider retaining old recommended
35573 routers for even longer.
35574 - If most authorities set a BadExit flag for a server, clients
35575 don't think of it as a general-purpose exit. Clients only consider
35576 authorities that advertise themselves as listing bad exits.
35577 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
35578 headers for content, so that we can work better in the presence of
35579 caching HTTP proxies.
35580 - Allow authorities to list nodes as bad exits by fingerprint or by
35583 o Minor features, controller:
35584 - Add a REASON field to CIRC events; for backward compatibility, this
35585 field is sent only to controllers that have enabled the extended
35586 event format. Also, add additional reason codes to explain why
35587 a given circuit has been destroyed or truncated. (Patches from
35589 - Add a REMOTE_REASON field to extended CIRC events to tell the
35590 controller about why a remote OR told us to close a circuit.
35591 - Stream events also now have REASON and REMOTE_REASON fields,
35592 working much like those for circuit events.
35593 - There's now a GETINFO ns/... field so that controllers can ask Tor
35594 about the current status of a router.
35595 - A new event type "NS" to inform a controller when our opinion of
35596 a router's status has changed.
35597 - Add a GETINFO events/names and GETINFO features/names so controllers
35598 can tell which events and features are supported.
35599 - A new CLEARDNSCACHE signal to allow controllers to clear the
35600 client-side DNS cache without expiring circuits.
35602 o Security bugfixes:
35603 - When the user sends a NEWNYM signal, clear the client-side DNS
35604 cache too. Otherwise we continue to act on previous information.
35607 - Avoid sending junk to controllers or segfaulting when a controller
35608 uses EVENT_NEW_DESC with verbose nicknames.
35609 - Stop triggering asserts if the controller tries to extend hidden
35610 service circuits (reported by mwenge).
35611 - Avoid infinite loop on unexpected controller input.
35612 - When the controller does a "GETINFO network-status", tell it
35613 about even those routers whose descriptors are very old, and use
35614 long nicknames where appropriate.
35615 - Change NT service functions to be loaded on demand. This lets us
35616 build with MinGW without breaking Tor for Windows 98 users.
35617 - Do DirPort reachability tests less often, since a single test
35618 chews through many circuits before giving up.
35619 - In the hidden service example in torrc.sample, stop recommending
35620 esoteric and discouraged hidden service options.
35621 - When stopping an NT service, wait up to 10 sec for it to actually
35622 stop. Patch from Matt Edman; resolves bug 295.
35623 - Fix handling of verbose nicknames with ORCONN controller events:
35624 make them show up exactly when requested, rather than exactly when
35626 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
35627 printing a duplicate "$" in the keys we send (reported by mwenge).
35628 - Correctly set maximum connection limit on Cygwin. (This time
35630 - Try to detect Windows correctly when cross-compiling.
35631 - Detect the size of the routers file correctly even if it is
35632 corrupted (on systems without mmap) or not page-aligned (on systems
35633 with mmap). This bug was harmless.
35634 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
35635 to open a stream fails; now we do in more cases. This should
35636 make clients able to find a good exit faster in some cases, since
35637 unhandleable requests will now get an error rather than timing out.
35638 - Resolve two memory leaks when rebuilding the on-disk router cache
35639 (reported by fookoowa).
35640 - Clean up minor code warnings suggested by the MIPSpro C compiler,
35641 and reported by some Centos users.
35642 - Controller signals now work on non-Unix platforms that don't define
35643 SIGUSR1 and SIGUSR2 the way we expect.
35644 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
35645 values before failing, and always enables eventdns.
35646 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
35647 Try to fix this in configure.in by checking for most functions
35648 before we check for libevent.
35651 Changes in version 0.1.2.2-alpha - 2006-10-07
35653 - Make our async eventdns library on-by-default for Tor servers,
35654 and plan to deprecate the separate dnsworker threads.
35655 - Add server-side support for "reverse" DNS lookups (using PTR
35656 records so clients can determine the canonical hostname for a given
35657 IPv4 address). Only supported by servers using eventdns; servers
35658 now announce in their descriptors whether they support eventdns.
35659 - Specify and implement client-side SOCKS5 interface for reverse DNS
35660 lookups (see doc/socks-extensions.txt).
35661 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
35662 connect to directory servers through Tor. Previously, clients needed
35663 to find Tor exits to make private connections to directory servers.
35664 - Avoid choosing Exit nodes for entry or middle hops when the
35665 total bandwidth available from non-Exit nodes is much higher than
35666 the total bandwidth available from Exit nodes.
35667 - Workaround for name servers (like Earthlink's) that hijack failing
35668 DNS requests and replace the no-such-server answer with a "helpful"
35669 redirect to an advertising-driven search portal. Also work around
35670 DNS hijackers who "helpfully" decline to hijack known-invalid
35671 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
35672 lets you turn it off.
35673 - Send out a burst of long-range padding cells once we've established
35674 that we're reachable. Spread them over 4 circuits, so hopefully
35675 a few will be fast. This exercises our bandwidth and bootstraps
35676 us into the directory more quickly.
35678 o New/improved config options:
35679 - Add new config option "ResolvConf" to let the server operator
35680 choose an alternate resolve.conf file when using eventdns.
35681 - Add an "EnforceDistinctSubnets" option to control our "exclude
35682 servers on the same /16" behavior. It's still on by default; this
35683 is mostly for people who want to operate private test networks with
35684 all the machines on the same subnet.
35685 - If one of our entry guards is on the ExcludeNodes list, or the
35686 directory authorities don't think it's a good guard, treat it as
35687 if it were unlisted: stop using it as a guard, and throw it off
35688 the guards list if it stays that way for a long time.
35689 - Allow directory authorities to be marked separately as authorities
35690 for the v1 directory protocol, the v2 directory protocol, and
35691 as hidden service directories, to make it easier to retire old
35692 authorities. V1 authorities should set "HSAuthoritativeDir 1"
35693 to continue being hidden service authorities too.
35694 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
35696 o Minor features, controller:
35697 - Fix CIRC controller events so that controllers can learn the
35698 identity digests of non-Named servers used in circuit paths.
35699 - Let controllers ask for more useful identifiers for servers. Instead
35700 of learning identity digests for un-Named servers and nicknames
35701 for Named servers, the new identifiers include digest, nickname,
35702 and indication of Named status. Off by default; see control-spec.txt
35703 for more information.
35704 - Add a "getinfo address" controller command so it can display Tor's
35705 best guess to the user.
35706 - New controller event to alert the controller when our server
35707 descriptor has changed.
35708 - Give more meaningful errors on controller authentication failure.
35710 o Minor features, other:
35711 - When asked to resolve a hostname, don't use non-exit servers unless
35712 requested to do so. This allows servers with broken DNS to be
35713 useful to the network.
35714 - Divide eventdns log messages into warn and info messages.
35715 - Reserve the nickname "Unnamed" for routers that can't pick
35716 a hostname: any router can call itself Unnamed; directory
35717 authorities will never allocate Unnamed to any particular router;
35718 clients won't believe that any router is the canonical Unnamed.
35719 - Only include function names in log messages for info/debug messages.
35720 For notice/warn/err, the content of the message should be clear on
35721 its own, and printing the function name only confuses users.
35722 - Avoid some false positives during reachability testing: don't try
35723 to test via a server that's on the same /24 as us.
35724 - If we fail to build a circuit to an intended enclave, and it's
35725 not mandatory that we use that enclave, stop wanting it.
35726 - When eventdns is enabled, allow multithreaded builds on NetBSD and
35727 OpenBSD. (We had previously disabled threads on these platforms
35728 because they didn't have working thread-safe resolver functions.)
35730 o Major bugfixes, anonymity/security:
35731 - If a client asked for a server by name, and there's a named server
35732 in our network-status but we don't have its descriptor yet, we
35733 could return an unnamed server instead.
35734 - Fix NetBSD bug that could allow someone to force uninitialized RAM
35735 to be sent to a server's DNS resolver. This only affects NetBSD
35736 and other platforms that do not bounds-check tolower().
35737 - Reject (most) attempts to use Tor circuits with length one. (If
35738 many people start using Tor as a one-hop proxy, exit nodes become
35739 a more attractive target for compromise.)
35740 - Just because your DirPort is open doesn't mean people should be
35741 able to remotely teach you about hidden service descriptors. Now
35742 only accept rendezvous posts if you've got HSAuthoritativeDir set.
35744 o Major bugfixes, other:
35745 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
35746 - When a client asks the server to resolve (not connect to)
35747 an address, and it has a cached answer, give them the cached answer.
35748 Previously, the server would give them no answer at all.
35749 - Allow really slow clients to not hang up five minutes into their
35750 directory downloads (suggested by Adam J. Richter).
35751 - We were building exactly the wrong circuits when we anticipated
35752 hidden service requirements, meaning Tor would have to build all
35753 its circuits on demand.
35754 - Avoid crashing when we mmap a router cache file of size 0.
35755 - When testing reachability of our DirPort, don't launch new
35756 tests when there's already one in progress -- unreachable
35757 servers were stacking up dozens of testing streams.
35759 o Minor bugfixes, correctness:
35760 - If we're a directory mirror and we ask for "all" network status
35761 documents, we would discard status documents from authorities
35762 we don't recognize.
35763 - Avoid a memory corruption bug when creating a hash table for
35765 - Avoid controller-triggered crash when misusing certain commands
35766 from a v0 controller on platforms that do not handle
35767 printf("%s",NULL) gracefully.
35768 - Don't crash when a controller sends a third argument to an
35769 "extendcircuit" request.
35770 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
35771 response; fix error code when "getinfo dir/status/" fails.
35772 - Avoid crash when telling controller stream-status and a stream
35774 - Patch from Adam Langley to fix assert() in eventdns.c.
35775 - Fix a debug log message in eventdns to say "X resolved to Y"
35776 instead of "X resolved to X".
35777 - Make eventdns give strings for DNS errors, not just error numbers.
35778 - Track unreachable entry guards correctly: don't conflate
35779 'unreachable by us right now' with 'listed as down by the directory
35780 authorities'. With the old code, if a guard was unreachable by
35781 us but listed as running, it would clog our guard list forever.
35782 - Behave correctly in case we ever have a network with more than
35783 2GB/s total advertised capacity.
35784 - Make TrackExitHosts case-insensitive, and fix the behavior of
35785 ".suffix" TrackExitHosts items to avoid matching in the middle of
35787 - Finally fix the openssl warnings from newer gccs that believe that
35788 ignoring a return value is okay, but casting a return value and
35789 then ignoring it is a sign of madness.
35790 - Prevent the contrib/exitlist script from printing the same
35791 result more than once.
35792 - Patch from Steve Hildrey: Generate network status correctly on
35793 non-versioning dirservers.
35794 - Don't listen to the X-Your-Address-Is hint if you did the lookup
35795 via Tor; otherwise you'll think you're the exit node's IP address.
35797 o Minor bugfixes, performance:
35798 - Two small performance improvements on parsing descriptors.
35799 - Major performance improvement on inserting descriptors: change
35800 algorithm from O(n^2) to O(n).
35801 - Make the common memory allocation path faster on machines where
35802 malloc(0) returns a pointer.
35803 - Start remembering X-Your-Address-Is directory hints even if you're
35804 a client, so you can become a server more smoothly.
35805 - Avoid duplicate entries on MyFamily line in server descriptor.
35807 o Packaging, features:
35808 - Remove architecture from OS X builds. The official builds are
35809 now universal binaries.
35810 - The Debian package now uses --verify-config when (re)starting,
35811 to distinguish configuration errors from other errors.
35812 - Update RPMs to require libevent 1.1b.
35814 o Packaging, bugfixes:
35815 - Patches so Tor builds with MinGW on Windows.
35816 - Patches so Tor might run on Cygwin again.
35817 - Resume building on non-gcc compilers and ancient gcc. Resume
35818 building with the -O0 compile flag. Resume building cleanly on
35820 - Run correctly on OS X platforms with case-sensitive filesystems.
35821 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
35822 - Add autoconf checks so Tor can build on Solaris x86 again.
35825 - Documented (and renamed) ServerDNSSearchDomains and
35826 ServerDNSResolvConfFile options.
35827 - Be clearer that the *ListenAddress directives can be repeated
35831 Changes in version 0.1.1.24 - 2006-09-29
35833 - Allow really slow clients to not hang up five minutes into their
35834 directory downloads (suggested by Adam J. Richter).
35835 - Fix major performance regression from 0.1.0.x: instead of checking
35836 whether we have enough directory information every time we want to
35837 do something, only check when the directory information has changed.
35838 This should improve client CPU usage by 25-50%.
35839 - Don't crash if, after a server has been running for a while,
35840 it can't resolve its hostname.
35843 - Allow Tor to start when RunAsDaemon is set but no logs are set.
35844 - Don't crash when the controller receives a third argument to an
35845 "extendcircuit" request.
35846 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
35847 response; fix error code when "getinfo dir/status/" fails.
35848 - Fix configure.in to not produce broken configure files with
35849 more recent versions of autoconf. Thanks to Clint for his auto*
35851 - Fix security bug on NetBSD that could allow someone to force
35852 uninitialized RAM to be sent to a server's DNS resolver. This
35853 only affects NetBSD and other platforms that do not bounds-check
35855 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
35856 methods: these are known to be buggy.
35857 - If we're a directory mirror and we ask for "all" network status
35858 documents, we would discard status documents from authorities
35859 we don't recognize.
35862 Changes in version 0.1.2.1-alpha - 2006-08-27
35864 - Add "eventdns" async dns library from Adam Langley, tweaked to
35865 build on OSX and Windows. Only enabled if you pass the
35866 --enable-eventdns argument to configure.
35867 - Allow servers with no hostname or IP address to learn their
35868 IP address by asking the directory authorities. This code only
35869 kicks in when you would normally have exited with a "no address"
35870 error. Nothing's authenticated, so use with care.
35871 - Rather than waiting a fixed amount of time between retrying
35872 application connections, we wait only 5 seconds for the first,
35873 10 seconds for the second, and 15 seconds for each retry after
35874 that. Hopefully this will improve the expected user experience.
35875 - Patch from Tup to add support for transparent AP connections:
35876 this basically bundles the functionality of trans-proxy-tor
35877 into the Tor mainline. Now hosts with compliant pf/netfilter
35878 implementations can redirect TCP connections straight to Tor
35879 without diverting through SOCKS. Needs docs.
35880 - Busy directory servers save lots of memory by spooling server
35881 descriptors, v1 directories, and v2 networkstatus docs to buffers
35882 as needed rather than en masse. Also mmap the cached-routers
35883 files, so we don't need to keep the whole thing in memory too.
35884 - Automatically avoid picking more than one node from the same
35885 /16 network when constructing a circuit.
35886 - Revise and clean up the torrc.sample that we ship with; add
35887 a section for BandwidthRate and BandwidthBurst.
35890 - Split circuit_t into origin_circuit_t and or_circuit_t, and
35891 split connection_t into edge, or, dir, control, and base structs.
35892 These will save quite a bit of memory on busy servers, and they'll
35893 also help us track down bugs in the code and bugs in the spec.
35894 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
35895 or later. Log when we are doing this, so we can diagnose it when
35896 it fails. (Also, recommend libevent 1.1b for kqueue and
35897 win32 methods; deprecate libevent 1.0b harder; make libevent
35898 recommendation system saner.)
35899 - Start being able to build universal binaries on OS X (thanks
35901 - Export the default exit policy via the control port, so controllers
35902 don't need to guess what it is / will be later.
35903 - Add a man page entry for ProtocolWarnings.
35904 - Add TestVia config option to the man page.
35905 - Remove even more protocol-related warnings from Tor server logs,
35906 such as bad TLS handshakes and malformed begin cells.
35907 - Stop fetching descriptors if you're not a dir mirror and you
35908 haven't tried to establish any circuits lately. [This currently
35909 causes some dangerous behavior, because when you start up again
35910 you'll use your ancient server descriptors.]
35911 - New DirPort behavior: if you have your dirport set, you download
35912 descriptors aggressively like a directory mirror, whether or not
35913 your ORPort is set.
35914 - Get rid of the router_retry_connections notion. Now routers
35915 no longer try to rebuild long-term connections to directory
35916 authorities, and directory authorities no longer try to rebuild
35917 long-term connections to all servers. We still don't hang up
35918 connections in these two cases though -- we need to look at it
35919 more carefully to avoid flapping, and we likely need to wait til
35920 0.1.1.x is obsolete.
35921 - Drop compatibility with obsolete Tors that permit create cells
35922 to have the wrong circ_id_type.
35923 - Re-enable per-connection rate limiting. Get rid of the "OP
35924 bandwidth" concept. Lay groundwork for "bandwidth classes" --
35925 separate global buckets that apply depending on what sort of conn
35927 - Start publishing one minute or so after we find our ORPort
35928 to be reachable. This will help reduce the number of descriptors
35929 we have for ourselves floating around, since it's quite likely
35930 other things (e.g. DirPort) will change during that minute too.
35931 - Fork the v1 directory protocol into its own spec document,
35932 and mark dir-spec.txt as the currently correct (v2) spec.
35935 - When we find our DirPort to be reachable, publish a new descriptor
35936 so we'll tell the world (reported by pnx).
35937 - Publish a new descriptor after we hup/reload. This is important
35938 if our config has changed such that we'll want to start advertising
35939 our DirPort now, etc.
35940 - Allow Tor to start when RunAsDaemon is set but no logs are set.
35941 - When we have a state file we cannot parse, tell the user and
35942 move it aside. Now we avoid situations where the user starts
35943 Tor in 1904, Tor writes a state file with that timestamp in it,
35944 the user fixes her clock, and Tor refuses to start.
35945 - Fix configure.in to not produce broken configure files with
35946 more recent versions of autoconf. Thanks to Clint for his auto*
35948 - "tor --verify-config" now exits with -1(255) or 0 depending on
35949 whether the config options are bad or good.
35950 - Resolve bug 321 when using dnsworkers: append a period to every
35951 address we resolve at the exit node, so that we do not accidentally
35952 pick up local addresses, and so that failing searches are retried
35953 in the resolver search domains. (This is already solved for
35954 eventdns.) (This breaks Blossom servers for now.)
35955 - If we are using an exit enclave and we can't connect, e.g. because
35956 its webserver is misconfigured to not listen on localhost, then
35957 back off and try connecting from somewhere else before we fail.
35960 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
35961 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
35962 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
35963 when the IP address is mapped through MapAddress to a hostname.
35964 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
35965 useless IPv6 DNS resolves.
35966 - Patch suggested by Karsten Loesing: respond to SIGNAL command
35967 before we execute the signal, in case the signal shuts us down.
35968 - Clean up AllowInvalidNodes man page entry.
35969 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
35970 - Add more asserts to track down an assert error on a windows Tor
35971 server with connection_add being called with socket == -1.
35972 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
35973 - Fix misleading log messages: an entry guard that is "unlisted",
35974 as well as not known to be "down" (because we've never heard
35975 of it), is not therefore "up".
35976 - Remove code to special-case "-cvs" ending, since it has not
35977 actually mattered since 0.0.9.
35978 - Make our socks5 handling more robust to broken socks clients:
35979 throw out everything waiting on the buffer in between socks
35980 handshake phases, since they can't possibly (so the theory
35981 goes) have predicted what we plan to respond to them.
35984 Changes in version 0.1.1.23 - 2006-07-30
35986 - Fast Tor servers, especially exit nodes, were triggering asserts
35987 due to a bug in handling the list of pending DNS resolves. Some
35988 bugs still remain here; we're hunting them.
35989 - Entry guards could crash clients by sending unexpected input.
35990 - More fixes on reachability testing: if you find yourself reachable,
35991 then don't ever make any client requests (so you stop predicting
35992 circuits), then hup or have your clock jump, then later your IP
35993 changes, you won't think circuits are working, so you won't try to
35994 test reachability, so you won't publish.
35997 - Avoid a crash if the controller does a resetconf firewallports
35998 and then a setconf fascistfirewall=1.
35999 - Avoid an integer underflow when the dir authority decides whether
36000 a router is stable: we might wrongly label it stable, and compute
36001 a slightly wrong median stability, when a descriptor is published
36003 - Fix a place where we might trigger an assert if we can't build our
36004 own server descriptor yet.
36007 Changes in version 0.1.1.22 - 2006-07-05
36009 - Fix a big bug that was causing servers to not find themselves
36010 reachable if they changed IP addresses. Since only 0.1.1.22+
36011 servers can do reachability testing correctly, now we automatically
36012 make sure to test via one of these.
36013 - Fix to allow clients and mirrors to learn directory info from
36014 descriptor downloads that get cut off partway through.
36015 - Directory authorities had a bug in deciding if a newly published
36016 descriptor was novel enough to make everybody want a copy -- a few
36017 servers seem to be publishing new descriptors many times a minute.
36019 - Fix a rare bug that was causing some servers to complain about
36020 "closing wedged cpuworkers" and skip some circuit create requests.
36021 - Make the Exit flag in directory status documents actually work.
36024 Changes in version 0.1.1.21 - 2006-06-10
36025 o Crash and assert fixes from 0.1.1.20:
36026 - Fix a rare crash on Tor servers that have enabled hibernation.
36027 - Fix a seg fault on startup for Tor networks that use only one
36028 directory authority.
36029 - Fix an assert from a race condition that occurs on Tor servers
36030 while exiting, where various threads are trying to log that they're
36031 exiting, and delete the logs, at the same time.
36032 - Make our unit tests pass again on certain obscure platforms.
36035 - Add support for building SUSE RPM packages.
36036 - Speed up initial bootstrapping for clients: if we are making our
36037 first ever connection to any entry guard, then don't mark it down
36039 - When only one Tor server in the network is labelled as a guard,
36040 and we've already picked him, we would cycle endlessly picking him
36041 again, being unhappy about it, etc. Now we specifically exclude
36042 current guards when picking a new guard.
36043 - Servers send create cells more reliably after the TLS connection
36044 is established: we were sometimes forgetting to send half of them
36045 when we had more than one pending.
36046 - If we get a create cell that asks us to extend somewhere, but the
36047 Tor server there doesn't match the expected digest, we now send
36048 a destroy cell back, rather than silently doing nothing.
36049 - Make options->RedirectExit work again.
36050 - Make cookie authentication for the controller work again.
36051 - Stop being picky about unusual characters in the arguments to
36052 mapaddress. It's none of our business.
36053 - Add a new config option "TestVia" that lets you specify preferred
36054 middle hops to use for test circuits. Perhaps this will let me
36055 debug the reachability problems better.
36057 o Log / documentation fixes:
36058 - If we're a server and some peer has a broken TLS certificate, don't
36059 log about it unless ProtocolWarnings is set, i.e., we want to hear
36060 about protocol violations by others.
36061 - Fix spelling of VirtualAddrNetwork in man page.
36062 - Add a better explanation at the top of the autogenerated torrc file
36063 about what happened to our old torrc.
36066 Changes in version 0.1.1.20 - 2006-05-23
36068 - Downgrade a log severity where servers complain that they're
36070 - Avoid a compile warning on FreeBSD.
36071 - Remove string size limit on NEWDESC messages; solve bug 291.
36072 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
36073 more thoroughly when we're running on windows.
36076 Changes in version 0.1.1.19-rc - 2006-05-03
36078 - Regenerate our local descriptor if it's dirty and we try to use
36079 it locally (e.g. if it changes during reachability detection).
36080 - If we setconf our ORPort to 0, we continued to listen on the
36081 old ORPort and receive connections.
36082 - Avoid a second warning about machine/limits.h on Debian
36084 - Be willing to add our own routerinfo into the routerlist.
36085 Now authorities will include themselves in their directories
36086 and network-statuses.
36087 - Stop trying to upload rendezvous descriptors to every
36088 directory authority: only try the v1 authorities.
36089 - Servers no longer complain when they think they're not
36090 registered with the directory authorities. There were too many
36092 - Backport dist-rpm changes so rpms can be built without errors.
36095 - Implement an option, VirtualAddrMask, to set which addresses
36096 get handed out in response to mapaddress requests. This works
36097 around a bug in tsocks where 127.0.0.0/8 is never socksified.
36100 Changes in version 0.1.1.18-rc - 2006-04-10
36102 - Work harder to download live network-statuses from all the
36103 directory authorities we know about. Improve the threshold
36104 decision logic so we're more robust to edge cases.
36105 - When fetching rendezvous descriptors, we were willing to ask
36106 v2 authorities too, which would always return 404.
36109 - Stop listing down or invalid nodes in the v1 directory. This will
36110 reduce its bulk by about 1/3, and reduce load on directory
36112 - When deciding whether a router is Fast or Guard-worthy, consider
36113 his advertised BandwidthRate and not just the BandwidthCapacity.
36114 - No longer ship INSTALL and README files -- they are useless now.
36115 - Force rpmbuild to behave and honor target_cpu.
36116 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
36117 - Start to include translated versions of the tor-doc-*.html
36118 files, along with the screenshots. Still needs more work.
36119 - Start sending back 512 and 451 errors if mapaddress fails,
36120 rather than not sending anything back at all.
36121 - When we fail to bind or listen on an incoming or outgoing
36122 socket, we should close it before failing. otherwise we just
36123 leak it. (thanks to weasel for finding.)
36124 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
36125 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
36126 - Make NoPublish (even though deprecated) work again.
36127 - Fix a minor security flaw where a versioning auth dirserver
36128 could list a recommended version many times in a row to make
36129 clients more convinced that it's recommended.
36130 - Fix crash bug if there are two unregistered servers running
36131 with the same nickname, one of them is down, and you ask for
36132 them by nickname in your EntryNodes or ExitNodes. Also, try
36133 to pick the one that's running rather than an arbitrary one.
36134 - Fix an infinite loop we could hit if we go offline for too long.
36135 - Complain when we hit WSAENOBUFS on recv() or write() too.
36136 Perhaps this will help us hunt the bug.
36137 - If you're not a versioning dirserver, don't put the string
36138 "client-versions \nserver-versions \n" in your network-status.
36139 - Lower the minimum required number of file descriptors to 1000,
36140 so we can have some overhead for Valgrind on Linux, where the
36141 default ulimit -n is 1024.
36144 - Add tor.dizum.com as the fifth authoritative directory server.
36145 - Add a new config option FetchUselessDescriptors, off by default,
36146 for when you plan to run "exitlist" on your client and you want
36147 to know about even the non-running descriptors.
36150 Changes in version 0.1.1.17-rc - 2006-03-28
36152 - Clients and servers since 0.1.1.10-alpha have been expiring
36153 connections whenever they are idle for 5 minutes and they *do*
36154 have circuits on them. Oops. With this new version, clients will
36155 discard their previous entry guard choices and avoid choosing
36156 entry guards running these flawed versions.
36157 - Fix memory leak when uncompressing concatenated zlib streams. This
36158 was causing substantial leaks over time on Tor servers.
36159 - The v1 directory was including servers as much as 48 hours old,
36160 because that's how the new routerlist->routers works. Now only
36161 include them if they're 20 hours old or less.
36164 - Resume building on irix64, netbsd 2.0, etc.
36165 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
36167 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
36168 and it is confusing some users.
36169 - Mirrors stop caching the v1 directory so often.
36170 - Make the max number of old descriptors that a cache will hold
36171 rise with the number of directory authorities, so we can scale.
36172 - Change our win32 uname() hack to be more forgiving about what
36173 win32 versions it thinks it's found.
36176 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
36178 - When the controller's *setconf commands fail, collect an error
36179 message in a string and hand it back to the controller.
36180 - Make the v2 dir's "Fast" flag based on relative capacity, just
36181 like "Stable" is based on median uptime. Name everything in the
36182 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
36183 - Log server fingerprint on startup, so new server operators don't
36184 have to go hunting around their filesystem for it.
36185 - Return a robots.txt on our dirport to discourage google indexing.
36186 - Let the controller ask for GETINFO dir/status/foo so it can ask
36187 directly rather than connecting to the dir port. Only works when
36188 dirport is set for now.
36190 o New config options rather than constants in the code:
36191 - SocksTimeout: How long do we let a socks connection wait
36192 unattached before we fail it?
36193 - CircuitBuildTimeout: Cull non-open circuits that were born
36194 at least this many seconds ago.
36195 - CircuitIdleTimeout: Cull open clean circuits that were born
36196 at least this many seconds ago.
36199 Changes in version 0.1.1.16-rc - 2006-03-18
36200 o Bugfixes on 0.1.1.15-rc:
36201 - Fix assert when the controller asks to attachstream a connect-wait
36202 or resolve-wait stream.
36203 - Now do address rewriting when the controller asks us to attach
36204 to a particular circuit too. This will let Blossom specify
36205 "moria2.exit" without having to learn what moria2's IP address is.
36206 - Make the "tor --verify-config" command-line work again, so people
36207 can automatically check if their torrc will parse.
36208 - Authoritative dirservers no longer require an open connection from
36209 a server to consider him "reachable". We need this change because
36210 when we add new auth dirservers, old servers won't know not to
36212 - Let Tor build on Sun CC again.
36213 - Fix an off-by-one buffer size in dirserv.c that magically never
36214 hit our three authorities but broke sjmurdoch's own tor network.
36215 - If we as a directory mirror don't know of any v1 directory
36216 authorities, then don't try to cache any v1 directories.
36217 - Stop warning about unknown servers in our family when they are
36218 given as hex digests.
36219 - Stop complaining as quickly to the server operator that he
36220 hasn't registered his nickname/key binding.
36221 - Various cleanups so we can add new V2 Auth Dirservers.
36222 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
36223 reflect the updated flags in our v2 dir protocol.
36224 - Resume allowing non-printable characters for exit streams (both
36225 for connecting and for resolving). Now we tolerate applications
36226 that don't follow the RFCs. But continue to block malformed names
36229 o Bugfixes on 0.1.0.x:
36230 - Fix assert bug in close_logs(): when we close and delete logs,
36231 remove them all from the global "logfiles" list.
36232 - Fix minor integer overflow in calculating when we expect to use up
36233 our bandwidth allocation before hibernating.
36234 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
36235 there are multiple SSLs installed with different versions.
36236 - When we try to be a server and Address is not explicitly set and
36237 our hostname resolves to a private IP address, try to use an
36238 interface address if it has a public address. Now Windows machines
36239 that think of themselves as localhost can work by default.
36242 - Let the controller ask for GETINFO dir/server/foo so it can ask
36243 directly rather than connecting to the dir port.
36244 - Let the controller tell us about certain router descriptors
36245 that it doesn't want Tor to use in circuits. Implement
36246 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
36247 - New config option SafeSocks to reject all application connections
36248 using unsafe socks protocols. Defaults to off.
36251 Changes in version 0.1.1.15-rc - 2006-03-11
36252 o Bugfixes and cleanups:
36253 - When we're printing strings from the network, don't try to print
36254 non-printable characters. This protects us against shell escape
36255 sequence exploits, and also against attacks to fool humans into
36256 misreading their logs.
36257 - Fix a bug where Tor would fail to establish any connections if you
36258 left it off for 24 hours and then started it: we were happy with
36259 the obsolete network statuses, but they all referred to router
36260 descriptors that were too old to fetch, so we ended up with no
36261 valid router descriptors.
36262 - Fix a seg fault in the controller's "getinfo orconn-status"
36263 command while listing status on incoming handshaking connections.
36264 Introduce a status name "NEW" for these connections.
36265 - If we get a linelist or linelist_s config option from the torrc
36266 (e.g. ExitPolicy) and it has no value, warn and skip rather than
36267 silently resetting it to its default.
36268 - Don't abandon entry guards until they've been down or gone for
36270 - Cleaner and quieter log messages.
36273 - New controller signal NEWNYM that makes new application requests
36274 use clean circuits.
36275 - Add a new circuit purpose 'controller' to let the controller ask
36276 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
36277 controller command to let you specify the purpose if you're
36278 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
36279 command to let you change a circuit's purpose after it's been
36281 - Accept "private:*" in routerdesc exit policies; not generated yet
36282 because older Tors do not understand it.
36283 - Add BSD-style contributed startup script "rc.subr" from Peter
36287 Changes in version 0.1.1.14-alpha - 2006-02-20
36288 o Bugfixes on 0.1.1.x:
36289 - Don't die if we ask for a stdout or stderr log (even implicitly)
36290 and we're set to RunAsDaemon -- just warn.
36291 - We still had a few bugs in the OR connection rotation code that
36292 caused directory servers to slowly aggregate connections to other
36293 fast Tor servers. This time for sure!
36294 - Make log entries on Win32 include the name of the function again.
36295 - We were treating a pair of exit policies if they were equal even
36296 if one said accept and the other said reject -- causing us to
36297 not always publish a new descriptor since we thought nothing
36299 - Retry pending server downloads as well as pending networkstatus
36300 downloads when we unexpectedly get a socks request.
36301 - We were ignoring the IS_FAST flag in the directory status,
36302 meaning we were willing to pick trivial-bandwidth nodes for "fast"
36304 - If the controller's SAVECONF command fails (e.g. due to file
36305 permissions), let the controller know that it failed.
36308 - If we're trying to be a Tor server and running Windows 95/98/ME
36309 as a server, explain that we'll likely crash.
36310 - When we're a server, a client asks for an old-style directory,
36311 and our write bucket is empty, don't give it to him. This way
36312 small servers can continue to serve the directory *sometimes*,
36313 without getting overloaded.
36314 - Compress exit policies even more -- look for duplicate lines
36316 - Clients now honor the "guard" flag in the router status when
36317 picking entry guards, rather than looking at is_fast or is_stable.
36318 - Retain unrecognized lines in $DATADIR/state file, so that we can
36319 be forward-compatible.
36320 - Generate 18.0.0.0/8 address policy format in descs when we can;
36321 warn when the mask is not reducible to a bit-prefix.
36322 - Let the user set ControlListenAddress in the torrc. This can be
36323 dangerous, but there are some cases (like a secured LAN) where it
36325 - Split ReachableAddresses into ReachableDirAddresses and
36326 ReachableORAddresses, so we can restrict Dir conns to port 80
36327 and OR conns to port 443.
36328 - Now we can target arch and OS in rpm builds (contributed by
36329 Phobos). Also make the resulting dist-rpm filename match the
36331 - New config options to help controllers: FetchServerDescriptors
36332 and FetchHidServDescriptors for whether to fetch server
36333 info and hidserv info or let the controller do it, and
36334 PublishServerDescriptor and PublishHidServDescriptors.
36335 - Also let the controller set the __AllDirActionsPrivate config
36336 option if you want all directory fetches/publishes to happen via
36337 Tor (it assumes your controller bootstraps your circuits).
36340 Changes in version 0.1.0.17 - 2006-02-17
36341 o Crash bugfixes on 0.1.0.x:
36342 - When servers with a non-zero DirPort came out of hibernation,
36343 sometimes they would trigger an assert.
36345 o Other important bugfixes:
36346 - On platforms that don't have getrlimit (like Windows), we were
36347 artificially constraining ourselves to a max of 1024
36348 connections. Now just assume that we can handle as many as 15000
36349 connections. Hopefully this won't cause other problems.
36351 o Backported features:
36352 - When we're a server, a client asks for an old-style directory,
36353 and our write bucket is empty, don't give it to him. This way
36354 small servers can continue to serve the directory *sometimes*,
36355 without getting overloaded.
36356 - Whenever you get a 503 in response to a directory fetch, try
36357 once more. This will become important once servers start sending
36358 503's whenever they feel busy.
36359 - Fetch a new directory every 120 minutes, not every 40 minutes.
36360 Now that we have hundreds of thousands of users running the old
36361 directory algorithm, it's starting to hurt a lot.
36362 - Bump up the period for forcing a hidden service descriptor upload
36363 from 20 minutes to 1 hour.
36366 Changes in version 0.1.1.13-alpha - 2006-02-09
36367 o Crashes in 0.1.1.x:
36368 - When you tried to setconf ORPort via the controller, Tor would
36369 crash. So people using TorCP to become a server were sad.
36370 - Solve (I hope) the stack-smashing bug that we were seeing on fast
36371 servers. The problem appears to be something do with OpenSSL's
36372 random number generation, or how we call it, or something. Let me
36373 know if the crashes continue.
36374 - Turn crypto hardware acceleration off by default, until we find
36375 somebody smart who can test it for us. (It appears to produce
36376 seg faults in at least some cases.)
36377 - Fix a rare assert error when we've tried all intro points for
36378 a hidden service and we try fetching the service descriptor again:
36379 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
36382 - Fix a major load balance bug: we were round-robining in 16 KB
36383 chunks, and servers with bandwidthrate of 20 KB, while downloading
36384 a 600 KB directory, would starve their other connections. Now we
36385 try to be a bit more fair.
36386 - Dir authorities and mirrors were never expiring the newest
36387 descriptor for each server, causing memory and directory bloat.
36388 - Fix memory-bloating and connection-bloating bug on servers: We
36389 were never closing any connection that had ever had a circuit on
36390 it, because we were checking conn->n_circuits == 0, yet we had a
36391 bug that let it go negative.
36392 - Make Tor work using squid as your http proxy again -- squid
36393 returns an error if you ask for a URL that's too long, and it uses
36394 a really generic error message. Plus, many people are behind a
36395 transparent squid so they don't even realize it.
36396 - On platforms that don't have getrlimit (like Windows), we were
36397 artificially constraining ourselves to a max of 1024
36398 connections. Now just assume that we can handle as many as 15000
36399 connections. Hopefully this won't cause other problems.
36400 - Add a new config option ExitPolicyRejectPrivate which defaults to
36401 1. This means all exit policies will begin with rejecting private
36402 addresses, unless the server operator explicitly turns it off.
36405 - Clients no longer download descriptors for non-running
36407 - Before we add new directory authorities, we should make it
36408 clear that only v1 authorities should receive/publish hidden
36409 service descriptors.
36412 - As soon as we've fetched some more directory info, immediately
36413 try to download more server descriptors. This way we don't have
36414 a 10 second pause during initial bootstrapping.
36415 - Remove even more loud log messages that the server operator can't
36417 - When we're running an obsolete or un-recommended version, make
36418 the log message more clear about what the problem is and what
36419 versions *are* still recommended.
36420 - Provide a more useful warn message when our onion queue gets full:
36421 the CPU is too slow or the exit policy is too liberal.
36422 - Don't warn when we receive a 503 from a dirserver/cache -- this
36423 will pave the way for them being able to refuse if they're busy.
36424 - When we fail to bind a listener, try to provide a more useful
36425 log message: e.g., "Is Tor already running?"
36426 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
36427 Goldberg can prove things about our handshake protocol more
36429 - MaxConn has been obsolete for a while now. Document the ConnLimit
36430 config option, which is a *minimum* number of file descriptors
36431 that must be available else Tor refuses to start.
36432 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
36433 if you log to syslog and want something other than LOG_DAEMON.
36434 - Make dirservers generate a separate "guard" flag to mean,
36435 "would make a good entry guard". Make clients parse it and vote
36436 on it. Not used by clients yet.
36437 - Implement --with-libevent-dir option to ./configure. Also, improve
36438 search techniques to find libevent, and use those for openssl too.
36439 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
36440 - Only start testing reachability once we've established a
36441 circuit. This will make startup on dirservers less noisy.
36442 - Don't try to upload hidden service descriptors until we have
36443 established a circuit.
36444 - Fix the controller's "attachstream 0" command to treat conn like
36445 it just connected, doing address remapping, handling .exit and
36446 .onion idioms, and so on. Now we're more uniform in making sure
36447 that the controller hears about new and closing connections.
36450 Changes in version 0.1.1.12-alpha - 2006-01-11
36451 o Bugfixes on 0.1.1.x:
36452 - The fix to close duplicate server connections was closing all
36453 Tor client connections if they didn't establish a circuit
36454 quickly enough. Oops.
36455 - Fix minor memory issue (double-free) that happened on exit.
36457 o Bugfixes on 0.1.0.x:
36458 - Tor didn't warn when it failed to open a log file.
36461 Changes in version 0.1.1.11-alpha - 2006-01-10
36462 o Crashes in 0.1.1.x:
36463 - Include all the assert/crash fixes from 0.1.0.16.
36464 - If you start Tor and then quit very quickly, there were some
36465 races that tried to free things that weren't allocated yet.
36466 - Fix a rare memory stomp if you're running hidden services.
36467 - Fix segfault when specifying DirServer in config without nickname.
36468 - Fix a seg fault when you finish connecting to a server but at
36469 that moment you dump his server descriptor.
36470 - Extendcircuit and Attachstream controller commands would
36471 assert/crash if you don't give them enough arguments.
36472 - Fix an assert error when we're out of space in the connection_list
36473 and we try to post a hidden service descriptor (reported by weasel).
36474 - If you specify a relative torrc path and you set RunAsDaemon in
36475 your torrc, then it chdir()'s to the new directory. If you HUP,
36476 it tries to load the new torrc location, fails, and exits.
36477 The fix: no longer allow a relative path to torrc using -f.
36480 - Implement "entry guards": automatically choose a handful of entry
36481 nodes and stick with them for all circuits. Only pick new guards
36482 when the ones you have are unsuitable, and if the old guards
36483 become suitable again, switch back. This will increase security
36484 dramatically against certain end-point attacks. The EntryNodes
36485 config option now provides some hints about which entry guards you
36486 want to use most; and StrictEntryNodes means to only use those.
36487 - New directory logic: download by descriptor digest, not by
36488 fingerprint. Caches try to download all listed digests from
36489 authorities; clients try to download "best" digests from caches.
36490 This avoids partitioning and isolating attacks better.
36491 - Make the "stable" router flag in network-status be the median of
36492 the uptimes of running valid servers, and make clients pay
36493 attention to the network-status flags. Thus the cutoff adapts
36494 to the stability of the network as a whole, making IRC, IM, etc
36495 connections more reliable.
36498 - Tor servers with dynamic IP addresses were needing to wait 18
36499 hours before they could start doing reachability testing using
36500 the new IP address and ports. This is because they were using
36501 the internal descriptor to learn what to test, yet they were only
36502 rebuilding the descriptor once they decided they were reachable.
36503 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
36504 to download certain server descriptors, throw them away, and then
36505 fetch them again after 30 minutes. Now mirrors throw away these
36506 server descriptors so clients can't get them.
36507 - We were leaving duplicate connections to other ORs open for a week,
36508 rather than closing them once we detect a duplicate. This only
36509 really affected authdirservers, but it affected them a lot.
36510 - Spread the authdirservers' reachability testing over the entire
36511 testing interval, so we don't try to do 500 TLS's at once every
36515 - If the network is down, and we try to connect to a conn because
36516 we have a circuit in mind, and we timeout (30 seconds) because the
36517 network never answers, we were expiring the circuit, but we weren't
36518 obsoleting the connection or telling the entry_guards functions.
36519 - Some Tor servers process billions of cells per day. These statistics
36520 need to be uint64_t's.
36521 - Check for integer overflows in more places, when adding elements
36522 to smartlists. This could possibly prevent a buffer overflow
36523 on malicious huge inputs. I don't see any, but I haven't looked
36525 - ReachableAddresses kept growing new "reject *:*" lines on every
36527 - When you "setconf log" via the controller, it should remove all
36528 logs. We were automatically adding back in a "log notice stdout".
36529 - Newly bootstrapped Tor networks couldn't establish hidden service
36530 circuits until they had nodes with high uptime. Be more tolerant.
36531 - We were marking servers down when they could not answer every piece
36532 of the directory request we sent them. This was far too harsh.
36533 - Fix the torify (tsocks) config file to not use Tor for localhost
36535 - Directory authorities now go to the proper authority when asking for
36536 a networkstatus, even when they want a compressed one.
36537 - Fix a harmless bug that was causing Tor servers to log
36538 "Got an end because of misc error, but we're not an AP. Closing."
36539 - Authorities were treating their own descriptor changes as cosmetic,
36540 meaning the descriptor available in the network-status and the
36541 descriptor that clients downloaded were different.
36542 - The OS X installer was adding a symlink for tor_resolve but
36543 the binary was called tor-resolve (reported by Thomas Hardly).
36544 - Workaround a problem with some http proxies where they refuse GET
36545 requests that specify "Content-Length: 0" (reported by Adrian).
36546 - Fix wrong log message when you add a "HiddenServiceNodes" config
36547 line without any HiddenServiceDir line (reported by Chris Thomas).
36550 - Write the TorVersion into the state file so we have a prayer of
36551 keeping forward and backward compatibility.
36552 - Revive the FascistFirewall config option rather than eliminating it:
36553 now it's a synonym for ReachableAddresses *:80,*:443.
36554 - Clients choose directory servers from the network status lists,
36555 not from their internal list of router descriptors. Now they can
36556 go to caches directly rather than needing to go to authorities
36558 - Directory authorities ignore router descriptors that have only
36559 cosmetic differences: do this for 0.1.0.x servers now too.
36560 - Add a new flag to network-status indicating whether the server
36561 can answer v2 directory requests too.
36562 - Authdirs now stop whining so loudly about bad descriptors that
36563 they fetch from other dirservers. So when there's a log complaint,
36564 it's for sure from a freshly uploaded descriptor.
36565 - Reduce memory requirements in our structs by changing the order
36567 - There used to be two ways to specify your listening ports in a
36568 server descriptor: on the "router" line and with a separate "ports"
36569 line. Remove support for the "ports" line.
36570 - New config option "AuthDirRejectUnlisted" for auth dirservers as
36571 a panic button: if we get flooded with unusable servers we can
36572 revert to only listing servers in the approved-routers file.
36573 - Auth dir servers can now mark a fingerprint as "!reject" or
36574 "!invalid" in the approved-routers file (as its nickname), to
36575 refuse descriptors outright or include them but marked as invalid.
36576 - Servers store bandwidth history across restarts/crashes.
36577 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
36578 get a better idea of why their circuits failed. Not used yet.
36579 - Directory mirrors now cache up to 16 unrecognized network-status
36580 docs. Now we can add new authdirservers and they'll be cached too.
36581 - When picking a random directory, prefer non-authorities if any
36583 - New controller option "getinfo desc/all-recent" to fetch the
36584 latest server descriptor for every router that Tor knows about.
36587 Changes in version 0.1.0.16 - 2006-01-02
36588 o Crash bugfixes on 0.1.0.x:
36589 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
36590 corrupting the heap, losing FDs, or crashing when we need to resize
36591 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
36592 - It turns out sparc64 platforms crash on unaligned memory access
36593 too -- so detect and avoid this.
36594 - Handle truncated compressed data correctly (by detecting it and
36596 - Fix possible-but-unlikely free(NULL) in control.c.
36597 - When we were closing connections, there was a rare case that
36598 stomped on memory, triggering seg faults and asserts.
36599 - Avoid potential infinite recursion when building a descriptor. (We
36600 don't know that it ever happened, but better to fix it anyway.)
36601 - We were neglecting to unlink marked circuits from soon-to-close OR
36602 connections, which caused some rare scribbling on freed memory.
36603 - Fix a memory stomping race bug when closing the joining point of two
36604 rendezvous circuits.
36605 - Fix an assert in time parsing found by Steven Murdoch.
36607 o Other bugfixes on 0.1.0.x:
36608 - When we're doing reachability testing, provide more useful log
36609 messages so the operator knows what to expect.
36610 - Do not check whether DirPort is reachable when we are suppressing
36611 advertising it because of hibernation.
36612 - When building with -static or on Solaris, we sometimes needed -ldl.
36613 - When we're deciding whether a stream has enough circuits around
36614 that can handle it, count the freshly dirty ones and not the ones
36615 that are so dirty they won't be able to handle it.
36616 - When we're expiring old circuits, we had a logic error that caused
36617 us to close new rendezvous circuits rather than old ones.
36618 - Give a more helpful log message when you try to change ORPort via
36619 the controller: you should upgrade Tor if you want that to work.
36620 - We were failing to parse Tor versions that start with "Tor ".
36621 - Tolerate faulty streams better: when a stream fails for reason
36622 exitpolicy, stop assuming that the router is lying about his exit
36623 policy. When a stream fails for reason misc, allow it to retry just
36624 as if it was resolvefailed. When a stream has failed three times,
36625 reset its failure count so we can try again and get all three tries.
36628 Changes in version 0.1.1.10-alpha - 2005-12-11
36629 o Correctness bugfixes on 0.1.0.x:
36630 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
36631 corrupting the heap, losing FDs, or crashing when we need to resize
36632 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
36633 - Stop doing the complex voodoo overkill checking for insecure
36634 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
36635 - When we were closing connections, there was a rare case that
36636 stomped on memory, triggering seg faults and asserts.
36637 - We were neglecting to unlink marked circuits from soon-to-close OR
36638 connections, which caused some rare scribbling on freed memory.
36639 - When we're deciding whether a stream has enough circuits around
36640 that can handle it, count the freshly dirty ones and not the ones
36641 that are so dirty they won't be able to handle it.
36642 - Recover better from TCP connections to Tor servers that are
36643 broken but don't tell you (it happens!); and rotate TLS
36644 connections once a week.
36645 - When we're expiring old circuits, we had a logic error that caused
36646 us to close new rendezvous circuits rather than old ones.
36647 - Fix a scary-looking but apparently harmless bug where circuits
36648 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
36649 servers, and never switch to state CIRCUIT_STATE_OPEN.
36650 - When building with -static or on Solaris, we sometimes needed to
36652 - Give a useful message when people run Tor as the wrong user,
36653 rather than telling them to start chowning random directories.
36654 - We were failing to inform the controller about new .onion streams.
36656 o Security bugfixes on 0.1.0.x:
36657 - Refuse server descriptors if the fingerprint line doesn't match
36658 the included identity key. Tor doesn't care, but other apps (and
36659 humans) might actually be trusting the fingerprint line.
36660 - We used to kill the circuit when we receive a relay command we
36661 don't recognize. Now we just drop it.
36662 - Start obeying our firewall options more rigorously:
36663 . If we can't get to a dirserver directly, try going via Tor.
36664 . Don't ever try to connect (as a client) to a place our
36665 firewall options forbid.
36666 . If we specify a proxy and also firewall options, obey the
36667 firewall options even when we're using the proxy: some proxies
36668 can only proxy to certain destinations.
36669 - Fix a bug found by Lasse Overlier: when we were making internal
36670 circuits (intended to be cannibalized later for rendezvous and
36671 introduction circuits), we were picking them so that they had
36672 useful exit nodes. There was no need for this, and it actually
36673 aids some statistical attacks.
36674 - Start treating internal circuits and exit circuits separately.
36675 It's important to keep them separate because internal circuits
36676 have their last hops picked like middle hops, rather than like
36677 exit hops. So exiting on them will break the user's expectations.
36679 o Bugfixes on 0.1.1.x:
36680 - Take out the mis-feature where we tried to detect IP address
36681 flapping for people with DynDNS, and chose not to upload a new
36682 server descriptor sometimes.
36683 - Try to be compatible with OpenSSL 0.9.6 again.
36684 - Log fix: when the controller is logging about .onion addresses,
36685 sometimes it didn't include the ".onion" part of the address.
36686 - Don't try to modify options->DirServers internally -- if the
36687 user didn't specify any, just add the default ones directly to
36688 the trusted dirserver list. This fixes a bug where people running
36689 controllers would use SETCONF on some totally unrelated config
36690 option, and Tor would start yelling at them about changing their
36692 - Let the controller's redirectstream command specify a port, in
36693 case the controller wants to change that too.
36694 - When we requested a pile of server descriptors, we sometimes
36695 accidentally launched a duplicate request for the first one.
36696 - Bugfix for trackhostexits: write down the fingerprint of the
36697 chosen exit, not its nickname, because the chosen exit might not
36699 - When parsing foo.exit, if foo is unknown, and we are leaving
36700 circuits unattached, set the chosen_exit field and leave the
36701 address empty. This matters because controllers got confused
36703 - Directory authorities no longer try to download server
36704 descriptors that they know they will reject.
36706 o Features and updates:
36707 - Replace balanced trees with hash tables: this should make stuff
36708 significantly faster.
36709 - Resume using the AES counter-mode implementation that we ship,
36710 rather than OpenSSL's. Ours is significantly faster.
36711 - Many other CPU and memory improvements.
36712 - Add a new config option FastFirstHopPK (on by default) so clients
36713 do a trivial crypto handshake for their first hop, since TLS has
36714 already taken care of confidentiality and authentication.
36715 - Add a new config option TestSocks so people can see if their
36716 applications are using socks4, socks4a, socks5-with-ip, or
36717 socks5-with-hostname. This way they don't have to keep mucking
36718 with tcpdump and wondering if something got cached somewhere.
36719 - Warn when listening on a public address for socks. I suspect a
36720 lot of people are setting themselves up as open socks proxies,
36721 and they have no idea that jerks on the Internet are using them,
36722 since they simply proxy the traffic into the Tor network.
36723 - Add "private:*" as an alias in configuration for policies. Now
36724 you can simplify your exit policy rather than needing to list
36725 every single internal or nonroutable network space.
36726 - Add a new controller event type that allows controllers to get
36727 all server descriptors that were uploaded to a router in its role
36728 as authoritative dirserver.
36729 - Start shipping socks-extensions.txt, tor-doc-unix.html,
36730 tor-doc-server.html, and stylesheet.css in the tarball.
36731 - Stop shipping tor-doc.html in the tarball.
36734 Changes in version 0.1.1.9-alpha - 2005-11-15
36735 o Usability improvements:
36736 - Start calling it FooListenAddress rather than FooBindAddress,
36737 since few of our users know what it means to bind an address
36739 - Reduce clutter in server logs. We're going to try to make
36740 them actually usable now. New config option ProtocolWarnings that
36741 lets you hear about how _other Tors_ are breaking the protocol. Off
36743 - Divide log messages into logging domains. Once we put some sort
36744 of interface on this, it will let people looking at more verbose
36745 log levels specify the topics they want to hear more about.
36746 - Make directory servers return better http 404 error messages
36747 instead of a generic "Servers unavailable".
36748 - Check for even more Windows version flags when writing the platform
36749 string in server descriptors, and note any we don't recognize.
36750 - Clean up more of the OpenSSL memory when exiting, so we can detect
36751 memory leaks better.
36752 - Make directory authorities be non-versioning, non-naming by
36753 default. Now we can add new directory servers without requiring
36754 their operators to pay close attention.
36755 - When logging via syslog, include the pid whenever we provide
36756 a log entry. Suggested by Todd Fries.
36758 o Performance improvements:
36759 - Directory servers now silently throw away new descriptors that
36760 haven't changed much if the timestamps are similar. We do this to
36761 tolerate older Tor servers that upload a new descriptor every 15
36762 minutes. (It seemed like a good idea at the time.)
36763 - Inline bottleneck smartlist functions; use fast versions by default.
36764 - Add a "Map from digest to void*" abstraction digestmap_t so we
36765 can do less hex encoding/decoding. Use it in router_get_by_digest()
36766 to resolve a performance bottleneck.
36767 - Allow tor_gzip_uncompress to extract as much as possible from
36768 truncated compressed data. Try to extract as many
36769 descriptors as possible from truncated http responses (when
36770 DIR_PURPOSE_FETCH_ROUTERDESC).
36771 - Make circ->onionskin a pointer, not a static array. moria2 was using
36772 125000 circuit_t's after it had been up for a few weeks, which
36773 translates to 20+ megs of wasted space.
36774 - The private half of our EDH handshake keys are now chosen out
36775 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
36777 o Security improvements:
36778 - Start making directory caches retain old routerinfos, so soon
36779 clients can start asking by digest of descriptor rather than by
36780 fingerprint of server.
36781 - Add half our entropy from RAND_poll in OpenSSL. This knows how
36782 to use egd (if present), openbsd weirdness (if present), vms/os2
36783 weirdness (if we ever port there), and more in the future.
36785 o Bugfixes on 0.1.0.x:
36786 - Do round-robin writes of at most 16 kB per write. This might be
36787 more fair on loaded Tor servers, and it might resolve our Windows
36788 crash bug. It might also slow things down.
36789 - Our TLS handshakes were generating a single public/private
36790 keypair for the TLS context, rather than making a new one for
36791 each new connections. Oops. (But we were still rotating them
36792 periodically, so it's not so bad.)
36793 - When we were cannibalizing a circuit with a particular exit
36794 node in mind, we weren't checking to see if that exit node was
36795 already present earlier in the circuit. Oops.
36796 - When a Tor server's IP changes (e.g. from a dyndns address),
36797 upload a new descriptor so clients will learn too.
36798 - Really busy servers were keeping enough circuits open on stable
36799 connections that they were wrapping around the circuit_id
36800 space. (It's only two bytes.) This exposed a bug where we would
36801 feel free to reuse a circuit_id even if it still exists but has
36802 been marked for close. Try to fix this bug. Some bug remains.
36803 - If we would close a stream early (e.g. it asks for a .exit that
36804 we know would refuse it) but the LeaveStreamsUnattached config
36805 option is set by the controller, then don't close it.
36807 o Bugfixes on 0.1.1.8-alpha:
36808 - Fix a big pile of memory leaks, some of them serious.
36809 - Do not try to download a routerdesc if we would immediately reject
36811 - Resume inserting a newline between all router descriptors when
36812 generating (old style) signed directories, since our spec says
36814 - When providing content-type application/octet-stream for
36815 server descriptors using .z, we were leaving out the
36816 content-encoding header. Oops. (Everything tolerated this just
36817 fine, but that doesn't mean we need to be part of the problem.)
36818 - Fix a potential seg fault in getconf and getinfo using version 1
36819 of the controller protocol.
36820 - Avoid crash: do not check whether DirPort is reachable when we
36821 are suppressing it because of hibernation.
36822 - Make --hash-password not crash on exit.
36825 Changes in version 0.1.1.8-alpha - 2005-10-07
36826 o New features (major):
36827 - Clients don't download or use the directory anymore. Now they
36828 download and use network-statuses from the trusted dirservers,
36829 and fetch individual server descriptors as needed from mirrors.
36830 See dir-spec.txt for all the gory details.
36831 - Be more conservative about whether to advertise our DirPort.
36832 The main change is to not advertise if we're running at capacity
36833 and either a) we could hibernate or b) our capacity is low and
36834 we're using a default DirPort.
36835 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
36837 o New features (minor):
36838 - Try to be smart about when to retry network-status and
36839 server-descriptor fetches. Still needs some tuning.
36840 - Stop parsing, storing, or using running-routers output (but
36841 mirrors still cache and serve it).
36842 - Consider a threshold of versioning dirservers (dirservers who have
36843 an opinion about which Tor versions are still recommended) before
36844 deciding whether to warn the user that he's obsolete.
36845 - Dirservers can now reject/invalidate by key and IP, with the
36846 config options "AuthDirInvalid" and "AuthDirReject". This is
36847 useful since currently we automatically list servers as running
36848 and usable even if we know they're jerks.
36849 - Provide dire warnings to any users who set DirServer; move it out
36850 of torrc.sample and into torrc.complete.
36851 - Add MyFamily to torrc.sample in the server section.
36852 - Add nicknames to the DirServer line, so we can refer to them
36853 without requiring all our users to memorize their IP addresses.
36854 - When we get an EOF or a timeout on a directory connection, note
36855 how many bytes of serverdesc we are dropping. This will help
36856 us determine whether it is smart to parse incomplete serverdesc
36858 - Add a new function to "change pseudonyms" -- that is, to stop
36859 using any currently-dirty circuits for new streams, so we don't
36860 link new actions to old actions. Currently it's only called on
36861 HUP (or SIGNAL RELOAD).
36862 - On sighup, if UseHelperNodes changed to 1, use new circuits.
36863 - Start using RAND_bytes rather than RAND_pseudo_bytes from
36864 OpenSSL. Also, reseed our entropy every hour, not just at
36865 startup. And entropy in 512-bit chunks, not 160-bit chunks.
36867 o Fixes on 0.1.1.7-alpha:
36868 - Nobody ever implemented EVENT_ADDRMAP for control protocol
36869 version 0, so don't let version 0 controllers ask for it.
36870 - If you requested something with too many newlines via the
36871 v1 controller protocol, you could crash tor.
36872 - Fix a number of memory leaks, including some pretty serious ones.
36873 - Re-enable DirPort testing again, so Tor servers will be willing
36874 to advertise their DirPort if it's reachable.
36875 - On TLS handshake, only check the other router's nickname against
36876 its expected nickname if is_named is set.
36878 o Fixes forward-ported from 0.1.0.15:
36879 - Don't crash when we don't have any spare file descriptors and we
36880 try to spawn a dns or cpu worker.
36881 - Make the numbers in read-history and write-history into uint64s,
36882 so they don't overflow and publish negatives in the descriptor.
36884 o Fixes on 0.1.0.x:
36885 - For the OS X package's modified privoxy config file, comment
36886 out the "logfile" line so we don't log everything passed
36888 - We were whining about using socks4 or socks5-with-local-lookup
36889 even when it's an IP in the "virtual" range we designed exactly
36891 - We were leaking some memory every time the client changes IPs.
36892 - Never call free() on tor_malloc()d memory. This will help us
36893 use dmalloc to detect memory leaks.
36894 - Check for named servers when looking them up by nickname;
36895 warn when we'recalling a non-named server by its nickname;
36896 don't warn twice about the same name.
36897 - Try to list MyFamily elements by key, not by nickname, and warn
36898 if we've not heard of the server.
36899 - Make windows platform detection (uname equivalent) smarter.
36900 - It turns out sparc64 doesn't like unaligned access either.
36903 Changes in version 0.1.0.15 - 2005-09-23
36904 o Bugfixes on 0.1.0.x:
36905 - Reject ports 465 and 587 (spam targets) in default exit policy.
36906 - Don't crash when we don't have any spare file descriptors and we
36907 try to spawn a dns or cpu worker.
36908 - Get rid of IgnoreVersion undocumented config option, and make us
36909 only warn, never exit, when we're running an obsolete version.
36910 - Don't try to print a null string when your server finds itself to
36911 be unreachable and the Address config option is empty.
36912 - Make the numbers in read-history and write-history into uint64s,
36913 so they don't overflow and publish negatives in the descriptor.
36914 - Fix a minor memory leak in smartlist_string_remove().
36915 - We were only allowing ourselves to upload a server descriptor at
36916 most every 20 minutes, even if it changed earlier than that.
36917 - Clean up log entries that pointed to old URLs.
36920 Changes in version 0.1.1.7-alpha - 2005-09-14
36921 o Fixes on 0.1.1.6-alpha:
36922 - Exit servers were crashing when people asked them to make a
36923 connection to an address not in their exit policy.
36924 - Looking up a non-existent stream for a v1 control connection would
36926 - Fix a seg fault if we ask a dirserver for a descriptor by
36927 fingerprint but he doesn't know about him.
36928 - SETCONF was appending items to linelists, not clearing them.
36929 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
36930 out and refuse the setconf if it would fail.
36931 - Downgrade the dirserver log messages when whining about
36935 - Add Peter Palfrader's check-tor script to tor/contrib/
36936 It lets you easily check whether a given server (referenced by
36937 nickname) is reachable by you.
36938 - Numerous changes to move towards client-side v2 directories. Not
36941 o Fixes on 0.1.0.x:
36942 - If the user gave tor an odd number of command-line arguments,
36943 we were silently ignoring the last one. Now we complain and fail.
36944 [This wins the oldest-bug prize -- this bug has been present since
36945 November 2002, as released in Tor 0.0.0.]
36946 - Do not use unaligned memory access on alpha, mips, or mipsel.
36947 It *works*, but is very slow, so we treat them as if it doesn't.
36948 - Retry directory requests if we fail to get an answer we like
36949 from a given dirserver (we were retrying before, but only if
36950 we fail to connect).
36951 - When writing the RecommendedVersions line, sort them first.
36952 - When the client asked for a rendezvous port that the hidden
36953 service didn't want to provide, we were sending an IP address
36954 back along with the end cell. Fortunately, it was zero. But stop
36956 - Correct "your server is reachable" log entries to indicate that
36957 it was self-testing that told us so.
36960 Changes in version 0.1.1.6-alpha - 2005-09-09
36961 o Fixes on 0.1.1.5-alpha:
36962 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
36963 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
36964 - Fix bug with tor_memmem finding a match at the end of the string.
36965 - Make unit tests run without segfaulting.
36966 - Resolve some solaris x86 compile warnings.
36967 - Handle duplicate lines in approved-routers files without warning.
36968 - Fix bug where as soon as a server refused any requests due to his
36969 exit policy (e.g. when we ask for localhost and he tells us that's
36970 127.0.0.1 and he won't do it), we decided he wasn't obeying his
36971 exit policy using him for any exits.
36972 - Only do openssl hardware accelerator stuff if openssl version is
36975 o New controller features/fixes:
36976 - Add a "RESETCONF" command so you can set config options like
36977 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
36978 a config option in the torrc with no value, then it clears it
36979 entirely (rather than setting it to its default).
36980 - Add a "GETINFO config-file" to tell us where torrc is.
36981 - Avoid sending blank lines when GETINFO replies should be empty.
36982 - Add a QUIT command for the controller (for using it manually).
36983 - Fix a bug in SAVECONF that was adding default dirservers and
36984 other redundant entries to the torrc file.
36986 o Start on the new directory design:
36987 - Generate, publish, cache, serve new network-status format.
36988 - Publish individual descriptors (by fingerprint, by "all", and by
36990 - Publish client and server recommended versions separately.
36991 - Allow tor_gzip_uncompress() to handle multiple concatenated
36992 compressed strings. Serve compressed groups of router
36993 descriptors. The compression logic here could be more
36995 - Distinguish v1 authorities (all currently trusted directories)
36996 from v2 authorities (all trusted directories).
36997 - Change DirServers config line to note which dirs are v1 authorities.
36998 - Add configuration option "V1AuthoritativeDirectory 1" which
36999 moria1, moria2, and tor26 should set.
37000 - Remove option when getting directory cache to see whether they
37001 support running-routers; they all do now. Replace it with one
37002 to see whether caches support v2 stuff.
37005 - Dirservers now do their own external reachability testing of each
37006 Tor server, and only list them as running if they've been found to
37007 be reachable. We also send back warnings to the server's logs if
37008 it uploads a descriptor that we already believe is unreachable.
37009 - Implement exit enclaves: if we know an IP address for the
37010 destination, and there's a running Tor server at that address
37011 which allows exit to the destination, then extend the circuit to
37012 that exit first. This provides end-to-end encryption and end-to-end
37013 authentication. Also, if the user wants a .exit address or enclave,
37014 use 4 hops rather than 3, and cannibalize a general circ for it
37016 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
37017 controller. Also, rotate dns and cpu workers if the controller
37018 changes options that will affect them; and initialize the dns
37019 worker cache tree whether or not we start out as a server.
37020 - Only upload a new server descriptor when options change, 18
37021 hours have passed, uptime is reset, or bandwidth changes a lot.
37022 - Check [X-]Forwarded-For headers in HTTP requests when generating
37023 log messages. This lets people run dirservers (and caches) behind
37024 Apache but still know which IP addresses are causing warnings.
37026 o Config option changes:
37027 - Replace (Fascist)Firewall* config options with a new
37028 ReachableAddresses option that understands address policies.
37029 For example, "ReachableAddresses *:80,*:443"
37030 - Get rid of IgnoreVersion undocumented config option, and make us
37031 only warn, never exit, when we're running an obsolete version.
37032 - Make MonthlyAccountingStart config option truly obsolete now.
37034 o Fixes on 0.1.0.x:
37035 - Reject ports 465 and 587 in the default exit policy, since
37036 people have started using them for spam too.
37037 - It turns out we couldn't bootstrap a network since we added
37038 reachability detection in 0.1.0.1-rc. Good thing the Tor network
37039 has never gone down. Add an AssumeReachable config option to let
37040 servers and dirservers bootstrap. When we're trying to build a
37041 high-uptime or high-bandwidth circuit but there aren't enough
37042 suitable servers, try being less picky rather than simply failing.
37043 - Our logic to decide if the OR we connected to was the right guy
37044 was brittle and maybe open to a mitm for unverified routers.
37045 - We weren't cannibalizing circuits correctly for
37046 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
37047 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
37048 build those from scratch. This should make hidden services faster.
37049 - Predict required circuits better, with an eye toward making hidden
37050 services faster on the service end.
37051 - Retry streams if the exit node sends back a 'misc' failure. This
37052 should result in fewer random failures. Also, after failing
37053 from resolve failed or misc, reset the num failures, so we give
37054 it a fair shake next time we try.
37055 - Clean up the rendezvous warn log msgs, and downgrade some to info.
37056 - Reduce severity on logs about dns worker spawning and culling.
37057 - When we're shutting down and we do something like try to post a
37058 server descriptor or rendezvous descriptor, don't complain that
37059 we seem to be unreachable. Of course we are, we're shutting down.
37060 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
37061 We don't use them yet, but maybe one day our DNS resolver will be
37062 able to discover them.
37063 - Make ContactInfo mandatory for authoritative directory servers.
37064 - Require server descriptors to list IPv4 addresses -- hostnames
37065 are no longer allowed. This also fixes some potential security
37066 problems with people providing hostnames as their address and then
37067 preferentially resolving them to partition users.
37068 - Change log line for unreachability to explicitly suggest /etc/hosts
37069 as the culprit. Also make it clearer what IP address and ports we're
37070 testing for reachability.
37071 - Put quotes around user-supplied strings when logging so users are
37072 more likely to realize if they add bad characters (like quotes)
37074 - Let auth dir servers start without specifying an Address config
37076 - Make unit tests (and other invocations that aren't the real Tor)
37077 run without launching listeners, creating subdirectories, and so on.
37080 Changes in version 0.1.1.5-alpha - 2005-08-08
37081 o Bugfixes included in 0.1.0.14.
37083 o Bugfixes on 0.1.0.x:
37084 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
37085 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
37086 it would silently using ignore the 6668.
37089 Changes in version 0.1.0.14 - 2005-08-08
37090 o Bugfixes on 0.1.0.x:
37091 - Fix the other half of the bug with crypto handshakes
37093 - Fix an assert trigger if you send a 'signal term' via the
37094 controller when it's listening for 'event info' messages.
37097 Changes in version 0.1.1.4-alpha - 2005-08-04
37098 o Bugfixes included in 0.1.0.13.
37101 - Improve tor_gettimeofday() granularity on windows.
37102 - Make clients regenerate their keys when their IP address changes.
37103 - Implement some more GETINFO goodness: expose helper nodes, config
37104 options, getinfo keys.
37107 Changes in version 0.1.0.13 - 2005-08-04
37108 o Bugfixes on 0.1.0.x:
37109 - Fix a critical bug in the security of our crypto handshakes.
37110 - Fix a size_t underflow in smartlist_join_strings2() that made
37111 it do bad things when you hand it an empty smartlist.
37112 - Fix Windows installer to ship Tor license (thanks to Aphex for
37113 pointing out this oversight) and put a link to the doc directory
37115 - Explicitly set no-unaligned-access for sparc: it turns out the
37116 new gcc's let you compile broken code, but that doesn't make it
37120 Changes in version 0.1.1.3-alpha - 2005-07-23
37121 o Bugfixes on 0.1.1.2-alpha:
37122 - Fix a bug in handling the controller's "post descriptor"
37124 - Fix several bugs in handling the controller's "extend circuit"
37126 - Fix a bug in handling the controller's "stream status" event.
37127 - Fix an assert failure if we have a controller listening for
37128 circuit events and we go offline.
37129 - Re-allow hidden service descriptors to publish 0 intro points.
37130 - Fix a crash when generating your hidden service descriptor if
37131 you don't have enough intro points already.
37133 o New features on 0.1.1.2-alpha:
37134 - New controller function "getinfo accounting", to ask how
37135 many bytes we've used in this time period.
37136 - Experimental support for helper nodes: a lot of the risk from
37137 a small static adversary comes because users pick new random
37138 nodes every time they rebuild a circuit. Now users will try to
37139 stick to the same small set of entry nodes if they can. Not
37140 enabled by default yet.
37142 o Bugfixes on 0.1.0.12:
37143 - If you're an auth dir server, always publish your dirport,
37144 even if you haven't yet found yourself to be reachable.
37145 - Fix a size_t underflow in smartlist_join_strings2() that made
37146 it do bad things when you hand it an empty smartlist.
37149 Changes in version 0.1.0.12 - 2005-07-18
37150 o New directory servers:
37151 - tor26 has changed IP address.
37153 o Bugfixes on 0.1.0.x:
37154 - Fix a possible double-free in tor_gzip_uncompress().
37155 - When --disable-threads is set, do not search for or link against
37156 pthreads libraries.
37157 - Don't trigger an assert if an authoritative directory server
37158 claims its dirport is 0.
37159 - Fix bug with removing Tor as an NT service: some people were
37160 getting "The service did not return an error." Thanks to Matt
37164 Changes in version 0.1.1.2-alpha - 2005-07-15
37165 o New directory servers:
37166 - tor26 has changed IP address.
37168 o Bugfixes on 0.1.0.x, crashes/leaks:
37169 - Port the servers-not-obeying-their-exit-policies fix from
37171 - Fix an fd leak in start_daemon().
37172 - On Windows, you can't always reopen a port right after you've
37173 closed it. So change retry_listeners() to only close and re-open
37174 ports that have changed.
37175 - Fix a possible double-free in tor_gzip_uncompress().
37177 o Bugfixes on 0.1.0.x, usability:
37178 - When tor_socketpair() fails in Windows, give a reasonable
37179 Windows-style errno back.
37180 - Let people type "tor --install" as well as "tor -install" when
37182 want to make it an NT service.
37183 - NT service patch from Matt Edman to improve error messages.
37184 - When the controller asks for a config option with an abbreviated
37185 name, give the full name in our response.
37186 - Correct the man page entry on TrackHostExitsExpire.
37187 - Looks like we were never delivering deflated (i.e. compressed)
37188 running-routers lists, even when asked. Oops.
37189 - When --disable-threads is set, do not search for or link against
37190 pthreads libraries.
37192 o Bugfixes on 0.1.1.x:
37193 - Fix a seg fault with autodetecting which controller version is
37197 - New hidden service descriptor format: put a version in it, and
37198 let people specify introduction/rendezvous points that aren't
37199 in "the directory" (which is subjective anyway).
37200 - Allow the DEBUG controller event to work again. Mark certain log
37201 entries as "don't tell this to controllers", so we avoid cycles.
37204 Changes in version 0.1.0.11 - 2005-06-30
37205 o Bugfixes on 0.1.0.x:
37206 - Fix major security bug: servers were disregarding their
37207 exit policies if clients behaved unexpectedly.
37208 - Make OS X init script check for missing argument, so we don't
37209 confuse users who invoke it incorrectly.
37210 - Fix a seg fault in "tor --hash-password foo".
37211 - The MAPADDRESS control command was broken.
37214 Changes in version 0.1.1.1-alpha - 2005-06-29
37216 - Make OS X init script check for missing argument, so we don't
37217 confuse users who invoke it incorrectly.
37218 - Fix a seg fault in "tor --hash-password foo".
37219 - Fix a possible way to DoS dirservers.
37220 - When we complain that your exit policy implicitly allows local or
37221 private address spaces, name them explicitly so operators can
37223 - Make the log message less scary when all the dirservers are
37224 temporarily unreachable.
37225 - We were printing the number of idle dns workers incorrectly when
37229 - Revised controller protocol (version 1) that uses ascii rather
37230 than binary. Add supporting libraries in python and java so you
37231 can use the controller from your applications without caring how
37232 our protocol works.
37233 - Spiffy new support for crypto hardware accelerators. Can somebody
37237 Changes in version 0.0.9.10 - 2005-06-16
37238 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
37239 - Refuse relay cells that claim to have a length larger than the
37240 maximum allowed. This prevents a potential attack that could read
37241 arbitrary memory (e.g. keys) from an exit server's process
37245 Changes in version 0.1.0.10 - 2005-06-14
37246 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
37247 libevent before 1.1a.
37250 Changes in version 0.1.0.9-rc - 2005-06-09
37252 - Reset buf->highwater every time buf_shrink() is called, not just on
37253 a successful shrink. This was causing significant memory bloat.
37254 - Fix buffer overflow when checking hashed passwords.
37255 - Security fix: if seeding the RNG on Win32 fails, quit.
37256 - Allow seeding the RNG on Win32 even when you're not running as
37258 - Disable threading on Solaris too. Something is wonky with it,
37259 cpuworkers, and reentrant libs.
37260 - Reenable the part of the code that tries to flush as soon as an
37261 OR outbuf has a full TLS record available. Perhaps this will make
37262 OR outbufs not grow as huge except in rare cases, thus saving lots
37263 of CPU time plus memory.
37264 - Reject malformed .onion addresses rather then passing them on as
37265 normal web requests.
37266 - Adapt patch from Adam Langley: fix possible memory leak in
37267 tor_lookup_hostname().
37268 - Initialize libevent later in the startup process, so the logs are
37269 already established by the time we start logging libevent warns.
37270 - Use correct errno on win32 if libevent fails.
37271 - Check and warn about known-bad/slow libevent versions.
37272 - Pay more attention to the ClientOnly config option.
37273 - Have torctl.in/tor.sh.in check for location of su binary (needed
37275 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
37276 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
37277 HttpProxyAuthenticator
37278 - Stop warning about sigpipes in the logs. We're going to
37279 pretend that getting these occasionally is normal and fine.
37280 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
37282 installer screens; and don't put stuff into StartupItems unless
37283 the user asks you to.
37284 - Require servers that use the default dirservers to have public IP
37285 addresses. We have too many servers that are configured with private
37286 IPs and their admins never notice the log entries complaining that
37287 their descriptors are being rejected.
37288 - Add OSX uninstall instructions. An actual uninstall script will
37292 Changes in version 0.1.0.8-rc - 2005-05-23
37294 - It turns out that kqueue on OS X 10.3.9 was causing kernel
37295 panics. Disable kqueue on all OS X Tors.
37296 - Fix RPM: remove duplicate line accidentally added to the rpm
37298 - Disable threads on openbsd too, since its gethostaddr is not
37300 - Tolerate libevent 0.8 since it still works, even though it's
37302 - Enable building on Red Hat 9.0 again.
37303 - Allow the middle hop of the testing circuit to be running any
37304 version, now that most of them have the bugfix to let them connect
37305 to unknown servers. This will allow reachability testing to work
37306 even when 0.0.9.7-0.0.9.9 become obsolete.
37307 - Handle relay cells with rh.length too large. This prevents
37308 a potential attack that could read arbitrary memory (maybe even
37309 keys) from the exit server's process.
37310 - We screwed up the dirport reachability testing when we don't yet
37311 have a cached version of the directory. Hopefully now fixed.
37312 - Clean up router_load_single_router() (used by the controller),
37313 so it doesn't seg fault on error.
37314 - Fix a minor memory leak when somebody establishes an introduction
37315 point at your Tor server.
37316 - If a socks connection ends because read fails, don't warn that
37317 you're not sending a socks reply back.
37320 - Add HttpProxyAuthenticator config option too, that works like
37321 the HttpsProxyAuthenticator config option.
37322 - Encode hashed controller passwords in hex instead of base64,
37323 to make it easier to write controllers.
37326 Changes in version 0.1.0.7-rc - 2005-05-17
37328 - Fix a bug in the OS X package installer that prevented it from
37329 installing on Tiger.
37330 - Fix a script bug in the OS X package installer that made it
37331 complain during installation.
37332 - Find libevent even if it's hiding in /usr/local/ and your
37333 CFLAGS and LDFLAGS don't tell you to look there.
37334 - Be able to link with libevent as a shared library (the default
37335 after 1.0d), even if it's hiding in /usr/local/lib and even
37336 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
37337 assuming you're running gcc. Otherwise fail and give a useful
37339 - Fix a bug in the RPM packager: set home directory for _tor to
37340 something more reasonable when first installing.
37341 - Free a minor amount of memory that is still reachable on exit.
37344 Changes in version 0.1.0.6-rc - 2005-05-14
37346 - Implement --disable-threads configure option. Disable threads on
37347 netbsd by default, because it appears to have no reentrant resolver
37349 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
37350 release (1.1) detects and disables kqueue if it's broken.
37351 - Append default exit policy before checking for implicit internal
37352 addresses. Now we don't log a bunch of complaints on startup
37353 when using the default exit policy.
37354 - Some people were putting "Address " in their torrc, and they had
37355 a buggy resolver that resolved " " to 0.0.0.0. Oops.
37356 - If DataDir is ~/.tor, and that expands to /.tor, then default to
37357 LOCALSTATEDIR/tor instead.
37358 - Fix fragmented-message bug in TorControl.py.
37359 - Resolve a minor bug which would prevent unreachable dirports
37360 from getting suppressed in the published descriptor.
37361 - When the controller gave us a new descriptor, we weren't resolving
37362 it immediately, so Tor would think its address was 0.0.0.0 until
37363 we fetched a new directory.
37364 - Fix an uppercase/lowercase case error in suppressing a bogus
37365 libevent warning on some Linuxes.
37368 - Begin scrubbing sensitive strings from logs by default. Turn off
37369 the config option SafeLogging if you need to do debugging.
37370 - Switch to a new buffer management algorithm, which tries to avoid
37371 reallocing and copying quite as much. In first tests it looks like
37372 it uses *more* memory on average, but less cpu.
37373 - First cut at support for "create-fast" cells. Clients can use
37374 these when extending to their first hop, since the TLS already
37375 provides forward secrecy and authentication. Not enabled on
37377 - When dirservers refuse a router descriptor, we now log its
37378 contactinfo, platform, and the poster's IP address.
37379 - Call tor_free_all instead of connections_free_all after forking, to
37380 save memory on systems that need to fork.
37381 - Whine at you if you're a server and you don't set your contactinfo.
37382 - Implement --verify-config command-line option to check if your torrc
37383 is valid without actually launching Tor.
37384 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
37385 rather than just rejecting it.
37388 Changes in version 0.1.0.5-rc - 2005-04-27
37390 - Stop trying to print a null pointer if an OR conn fails because
37391 we didn't like its cert.
37393 - Switch our internal buffers implementation to use a ring buffer,
37394 to hopefully improve performance for fast servers a lot.
37395 - Add HttpsProxyAuthenticator support (basic auth only), based
37396 on patch from Adam Langley.
37397 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
37398 the fast servers that have been joining lately.
37399 - Give hidden service accesses extra time on the first attempt,
37400 since 60 seconds is often only barely enough. This might improve
37402 - Improve performance for dirservers: stop re-parsing the whole
37403 directory every time you regenerate it.
37404 - Add more debugging info to help us find the weird dns freebsd
37405 pthreads bug; cleaner debug messages to help track future issues.
37408 Changes in version 0.0.9.9 - 2005-04-23
37409 o Bugfixes on 0.0.9.x:
37410 - If unofficial Tor clients connect and send weird TLS certs, our
37411 Tor server triggers an assert. This release contains a minimal
37412 backport from the broader fix that we put into 0.1.0.4-rc.
37415 Changes in version 0.1.0.4-rc - 2005-04-23
37417 - If unofficial Tor clients connect and send weird TLS certs, our
37418 Tor server triggers an assert. Stop asserting, and start handling
37419 TLS errors better in other situations too.
37420 - When the controller asks us to tell it about all the debug-level
37421 logs, it turns out we were generating debug-level logs while
37422 telling it about them, which turns into a bad loop. Now keep
37423 track of whether you're sending a debug log to the controller,
37424 and don't log when you are.
37425 - Fix the "postdescriptor" feature of the controller interface: on
37426 non-complete success, only say "done" once.
37428 - Clients are now willing to load balance over up to 2mB, not 1mB,
37429 of advertised bandwidth capacity.
37430 - Add a NoPublish config option, so you can be a server (e.g. for
37431 testing running Tor servers in other Tor networks) without
37432 publishing your descriptor to the primary dirservers.
37435 Changes in version 0.1.0.3-rc - 2005-04-08
37436 o Improvements on 0.1.0.2-rc:
37437 - Client now retries when streams end early for 'hibernating' or
37438 'resource limit' reasons, rather than failing them.
37439 - More automated handling for dirserver operators:
37440 - Automatically approve nodes running 0.1.0.2-rc or later,
37441 now that the the reachability detection stuff is working.
37442 - Now we allow two unverified servers with the same nickname
37443 but different keys. But if a nickname is verified, only that
37444 nickname+key are allowed.
37445 - If you're an authdirserver connecting to an address:port,
37446 and it's not the OR you were expecting, forget about that
37447 descriptor. If he *was* the one you were expecting, then forget
37448 about all other descriptors for that address:port.
37449 - Allow servers to publish descriptors from 12 hours in the future.
37450 Corollary: only whine about clock skew from the dirserver if
37451 he's a trusted dirserver (since now even verified servers could
37452 have quite wrong clocks).
37453 - Adjust maximum skew and age for rendezvous descriptors: let skew
37454 be 48 hours rather than 90 minutes.
37455 - Efficiency improvements:
37456 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
37457 it much faster to look up a circuit for each relay cell.
37458 - Remove most calls to assert_all_pending_dns_resolves_ok(),
37459 since they're eating our cpu on exit nodes.
37460 - Stop wasting time doing a case insensitive comparison for every
37461 dns name every time we do any lookup. Canonicalize the names to
37462 lowercase and be done with it.
37463 - Start sending 'truncated' cells back rather than destroy cells,
37464 if the circuit closes in front of you. This means we won't have
37465 to abandon partially built circuits.
37466 - Only warn once per nickname from add_nickname_list_to_smartlist
37467 per failure, so an entrynode or exitnode choice that's down won't
37469 - Put a note in the torrc about abuse potential with the default
37471 - Revise control spec and implementation to allow all log messages to
37472 be sent to controller with their severities intact (suggested by
37473 Matt Edman). Update TorControl to handle new log event types.
37474 - Provide better explanation messages when controller's POSTDESCRIPTOR
37476 - Stop putting nodename in the Platform string in server descriptors.
37477 It doesn't actually help, and it is confusing/upsetting some people.
37479 o Bugfixes on 0.1.0.2-rc:
37480 - We were printing the host mask wrong in exit policies in server
37481 descriptors. This isn't a critical bug though, since we were still
37482 obeying the exit policy internally.
37483 - Fix Tor when compiled with libevent but without pthreads: move
37484 connection_unregister() from _connection_free() to
37486 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
37487 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
37488 when we look through the connection array, we'll find any of the
37489 cpu/dnsworkers. This is no good.
37491 o Bugfixes on 0.0.9.8:
37492 - Fix possible bug on threading platforms (e.g. win32) which was
37493 leaking a file descriptor whenever a cpuworker or dnsworker died.
37494 - When using preferred entry or exit nodes, ignore whether the
37495 circuit wants uptime or capacity. They asked for the nodes, they
37497 - chdir() to your datadirectory at the *end* of the daemonize process,
37498 not the beginning. This was a problem because the first time you
37499 run tor, if your datadir isn't there, and you have runasdaemon set
37500 to 1, it will try to chdir to it before it tries to create it. Oops.
37501 - Handle changed router status correctly when dirserver reloads
37502 fingerprint file. We used to be dropping all unverified descriptors
37503 right then. The bug was hidden because we would immediately
37504 fetch a directory from another dirserver, which would include the
37505 descriptors we just dropped.
37506 - When we're connecting to an OR and he's got a different nickname/key
37507 than we were expecting, only complain loudly if we're an OP or a
37508 dirserver. Complaining loudly to the OR admins just confuses them.
37509 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
37510 artificially capped at 500kB.
37513 Changes in version 0.0.9.8 - 2005-04-07
37514 o Bugfixes on 0.0.9.x:
37515 - We have a bug that I haven't found yet. Sometimes, very rarely,
37516 cpuworkers get stuck in the 'busy' state, even though the cpuworker
37517 thinks of itself as idle. This meant that no new circuits ever got
37518 established. Here's a workaround to kill any cpuworker that's been
37519 busy for more than 100 seconds.
37522 Changes in version 0.1.0.2-rc - 2005-04-01
37523 o Bugfixes on 0.1.0.1-rc:
37524 - Fixes on reachability detection:
37525 - Don't check for reachability while hibernating.
37526 - If ORPort is reachable but DirPort isn't, still publish the
37527 descriptor, but zero out DirPort until it's found reachable.
37528 - When building testing circs for ORPort testing, use only
37529 high-bandwidth nodes, so fewer circuits fail.
37530 - Complain about unreachable ORPort separately from unreachable
37531 DirPort, so the user knows what's going on.
37532 - Make sure we only conclude ORPort reachability if we didn't
37533 initiate the conn. Otherwise we could falsely conclude that
37534 we're reachable just because we connected to the guy earlier
37535 and he used that same pipe to extend to us.
37536 - Authdirservers shouldn't do ORPort reachability detection,
37537 since they're in clique mode, so it will be rare to find a
37538 server not already connected to them.
37539 - When building testing circuits, always pick middle hops running
37540 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
37541 bug. (This is a kludge; it will go away when 0.0.9.x becomes
37543 - When we decide we're reachable, actually publish our descriptor
37545 - Fix bug in redirectstream in the controller.
37546 - Fix the state descriptor strings so logs don't claim edge streams
37547 are in a different state than they actually are.
37548 - Use recent libevent features when possible (this only really affects
37549 win32 and osx right now, because the new libevent with these
37550 features hasn't been released yet). Add code to suppress spurious
37552 - Prevent possible segfault in connection_close_unattached_ap().
37553 - Fix newlines on torrc in win32.
37554 - Improve error msgs when tor-resolve fails.
37556 o Improvements on 0.0.9.x:
37557 - New experimental script tor/contrib/ExerciseServer.py (needs more
37558 work) that uses the controller interface to build circuits and
37559 fetch pages over them. This will help us bootstrap servers that
37560 have lots of capacity but haven't noticed it yet.
37561 - New experimental script tor/contrib/PathDemo.py (needs more work)
37562 that uses the controller interface to let you choose whole paths
37564 "<hostname>.<path,separated by dots>.<length of path>.path"
37565 - When we've connected to an OR and handshaked but didn't like
37566 the result, we were closing the conn without sending destroy
37567 cells back for pending circuits. Now send those destroys.
37570 Changes in version 0.0.9.7 - 2005-04-01
37571 o Bugfixes on 0.0.9.x:
37572 - Fix another race crash bug (thanks to Glenn Fink for reporting).
37573 - Compare identity to identity, not to nickname, when extending to
37574 a router not already in the directory. This was preventing us from
37575 extending to unknown routers. Oops.
37576 - Make sure to create OS X Tor user in <500 range, so we aren't
37577 creating actual system users.
37578 - Note where connection-that-hasn't-sent-end was marked, and fix
37579 a few really loud instances of this harmless bug (it's fixed more
37583 Changes in version 0.1.0.1-rc - 2005-03-28
37585 - Add reachability testing. Your Tor server will automatically try
37586 to see if its ORPort and DirPort are reachable from the outside,
37587 and it won't upload its descriptor until it decides they are.
37588 - Handle unavailable hidden services better. Handle slow or busy
37589 hidden services better.
37590 - Add support for CONNECTing through https proxies, with "HttpsProxy"
37592 - New exit policy: accept most low-numbered ports, rather than
37593 rejecting most low-numbered ports.
37594 - More Tor controller support (still experimental). See
37595 http://tor.eff.org/doc/control-spec.txt for all the new features,
37596 including signals to emulate unix signals from any platform;
37597 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
37598 closestream; closecircuit; etc.
37599 - Make nt services work and start on startup on win32 (based on
37600 patch by Matt Edman).
37601 - Add a new AddressMap config directive to rewrite incoming socks
37602 addresses. This lets you, for example, declare an implicit
37603 required exit node for certain sites.
37604 - Add a new TrackHostExits config directive to trigger addressmaps
37605 for certain incoming socks addresses -- for sites that break when
37606 your exit keeps changing (based on patch by Mike Perry).
37607 - Redo the client-side dns cache so it's just an addressmap too.
37608 - Notice when our IP changes, and reset stats/uptime/reachability.
37609 - When an application is using socks5, give him the whole variety of
37610 potential socks5 responses (connect refused, host unreachable, etc),
37611 rather than just "success" or "failure".
37612 - A more sane version numbering system. See
37613 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
37614 - New contributed script "exitlist": a simple python script to
37615 parse directories and find Tor nodes that exit to listed
37617 - New contributed script "privoxy-tor-toggle" to toggle whether
37618 Privoxy uses Tor. Seems to be configured for Debian by default.
37619 - Report HTTP reasons to client when getting a response from directory
37620 servers -- so you can actually know what went wrong.
37621 - New config option MaxAdvertisedBandwidth which lets you advertise
37622 a low bandwidthrate (to not attract as many circuits) while still
37623 allowing a higher bandwidthrate in reality.
37625 o Robustness/stability fixes:
37626 - Make Tor use Niels Provos's libevent instead of its current
37627 poll-but-sometimes-select mess. This will let us use faster async
37628 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
37630 - pthread support now too. This was forced because when we forked,
37631 we ended up wasting a lot of duplicate ram over time. Also switch
37632 to foo_r versions of some library calls to allow reentry and
37634 - Better handling for heterogeneous / unreliable nodes:
37635 - Annotate circuits w/ whether they aim to contain high uptime nodes
37636 and/or high capacity nodes. When building circuits, choose
37638 - This means that every single node in an intro rend circuit,
37639 not just the last one, will have a minimum uptime.
37640 - New config option LongLivedPorts to indicate application streams
37641 that will want high uptime circuits.
37642 - Servers reset uptime when a dir fetch entirely fails. This
37643 hopefully reflects stability of the server's network connectivity.
37644 - If somebody starts his tor server in Jan 2004 and then fixes his
37645 clock, don't make his published uptime be a year.
37646 - Reset published uptime when you wake up from hibernation.
37647 - Introduce a notion of 'internal' circs, which are chosen without
37648 regard to the exit policy of the last hop. Intro and rendezvous
37649 circs must be internal circs, to avoid leaking information. Resolve
37650 and connect streams can use internal circs if they want.
37651 - New circuit pooling algorithm: make sure to have enough circs around
37652 to satisfy any predicted ports, and also make sure to have 2 internal
37653 circs around if we've required internal circs lately (and with high
37654 uptime if we've seen that lately too).
37655 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
37656 which describes how often we retry making new circuits if current
37657 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
37658 how long we're willing to make use of an already-dirty circuit.
37659 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
37660 circ as necessary, if there are any completed ones lying around
37661 when we try to launch one.
37662 - Make hidden services try to establish a rendezvous for 30 seconds,
37663 rather than for n (where n=3) attempts to build a circuit.
37664 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
37665 "ShutdownWaitLength".
37666 - Try to be more zealous about calling connection_edge_end when
37667 things go bad with edge conns in connection.c.
37668 - Revise tor-spec to add more/better stream end reasons.
37669 - Revise all calls to connection_edge_end to avoid sending "misc",
37670 and to take errno into account where possible.
37673 - Fix a race condition that can trigger an assert, when we have a
37674 pending create cell and an OR connection fails right then.
37675 - Fix several double-mark-for-close bugs, e.g. where we were finding
37676 a conn for a cell even if that conn is already marked for close.
37677 - Make sequence of log messages when starting on win32 with no config
37678 file more reasonable.
37679 - When choosing an exit node for a new non-internal circ, don't take
37680 into account whether it'll be useful for any pending x.onion
37681 addresses -- it won't.
37682 - Turn addr_policy_compare from a tristate to a quadstate; this should
37683 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
37684 for google.com" problem.
37685 - Make "platform" string in descriptor more accurate for Win32 servers,
37686 so it's not just "unknown platform".
37687 - Fix an edge case in parsing config options (thanks weasel).
37688 If they say "--" on the commandline, it's not an option.
37689 - Reject odd-looking addresses at the client (e.g. addresses that
37690 contain a colon), rather than having the server drop them because
37692 - tor-resolve requests were ignoring .exit if there was a working circuit
37693 they could use instead.
37694 - REUSEADDR on normal platforms means you can rebind to the port
37695 right after somebody else has let it go. But REUSEADDR on win32
37696 means to let you bind to the port _even when somebody else
37697 already has it bound_! So, don't do that on Win32.
37698 - Change version parsing logic: a version is "obsolete" if it is not
37699 recommended and (1) there is a newer recommended version in the
37700 same series, or (2) there are no recommended versions in the same
37701 series, but there are some recommended versions in a newer series.
37702 A version is "new" if it is newer than any recommended version in
37704 - Stop most cases of hanging up on a socks connection without sending
37708 - Require BandwidthRate to be at least 20kB/s for servers.
37709 - When a dirserver causes you to give a warn, mention which dirserver
37711 - New config option DirAllowPrivateAddresses for authdirservers.
37712 Now by default they refuse router descriptors that have non-IP or
37713 private-IP addresses.
37714 - Stop publishing socksport in the directory, since it's not
37715 actually meant to be public. For compatibility, publish a 0 there
37717 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
37718 smart" value, that is low for servers and high for clients.
37719 - If our clock jumps forward by 100 seconds or more, assume something
37720 has gone wrong with our network and abandon all not-yet-used circs.
37721 - Warn when exit policy implicitly allows local addresses.
37722 - If we get an incredibly skewed timestamp from a dirserver mirror
37723 that isn't a verified OR, don't warn -- it's probably him that's
37725 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
37726 cookies to disk and doesn't log each web request to disk. (Thanks
37727 to Brett Carrington for pointing this out.)
37728 - When a client asks us for a dir mirror and we don't have one,
37729 launch an attempt to get a fresh one.
37730 - If we're hibernating and we get a SIGINT, exit immediately.
37731 - Add --with-dmalloc ./configure option, to track memory leaks.
37732 - And try to free all memory on closing, so we can detect what
37734 - Cache local dns resolves correctly even when they're .exit
37736 - Give a better warning when some other server advertises an
37737 ORPort that is actually an apache running ssl.
37738 - Add "opt hibernating 1" to server descriptor to make it clearer
37739 whether the server is hibernating.
37742 Changes in version 0.0.9.6 - 2005-03-24
37743 o Bugfixes on 0.0.9.x (crashes and asserts):
37744 - Add new end stream reasons to maintenance branch. Fix bug where
37745 reason (8) could trigger an assert. Prevent bug from recurring.
37746 - Apparently win32 stat wants paths to not end with a slash.
37747 - Fix assert triggers in assert_cpath_layer_ok(), where we were
37748 blowing away the circuit that conn->cpath_layer points to, then
37749 checking to see if the circ is well-formed. Backport check to make
37750 sure we dont use the cpath on a closed connection.
37751 - Prevent circuit_resume_edge_reading_helper() from trying to package
37752 inbufs for marked-for-close streams.
37753 - Don't crash on hup if your options->address has become unresolvable.
37754 - Some systems (like OS X) sometimes accept() a connection and tell
37755 you the remote host is 0.0.0.0:0. If this happens, due to some
37756 other mis-features, we get confused; so refuse the conn for now.
37758 o Bugfixes on 0.0.9.x (other):
37759 - Fix harmless but scary "Unrecognized content encoding" warn message.
37760 - Add new stream error reason: TORPROTOCOL reason means "you are not
37761 speaking a version of Tor I understand; say bye-bye to your stream."
37762 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
37763 into the future, now that we are more tolerant of skew. This
37764 resolves a bug where a Tor server would refuse to cache a directory
37765 because all the directories it gets are too far in the future;
37766 yet the Tor server never logs any complaints about clock skew.
37767 - Mac packaging magic: make man pages useable, and do not overwrite
37768 existing torrc files.
37769 - Make OS X log happily to /var/log/tor/tor.log
37772 Changes in version 0.0.9.5 - 2005-02-22
37773 o Bugfixes on 0.0.9.x:
37774 - Fix an assert race at exit nodes when resolve requests fail.
37775 - Stop picking unverified dir mirrors--it only leads to misery.
37776 - Patch from Matt Edman to make NT services work better. Service
37777 support is still not compiled into the executable by default.
37778 - Patch from Dmitri Bely so the Tor service runs better under
37779 the win32 SYSTEM account.
37780 - Make tor-resolve actually work (?) on Win32.
37781 - Fix a sign bug when getrlimit claims to have 4+ billion
37782 file descriptors available.
37783 - Stop refusing to start when bandwidthburst == bandwidthrate.
37784 - When create cells have been on the onion queue more than five
37785 seconds, just send back a destroy and take them off the list.
37788 Changes in version 0.0.9.4 - 2005-02-03
37789 o Bugfixes on 0.0.9:
37790 - Fix an assert bug that took down most of our servers: when
37791 a server claims to have 1 GB of bandwidthburst, don't
37793 - Don't crash as badly if we have spawned the max allowed number
37794 of dnsworkers, or we're out of file descriptors.
37795 - Block more file-sharing ports in the default exit policy.
37796 - MaxConn is now automatically set to the hard limit of max
37797 file descriptors we're allowed (ulimit -n), minus a few for
37799 - Give a clearer message when servers need to raise their
37800 ulimit -n when they start running out of file descriptors.
37801 - SGI Compatibility patches from Jan Schaumann.
37802 - Tolerate a corrupt cached directory better.
37803 - When a dirserver hasn't approved your server, list which one.
37804 - Go into soft hibernation after 95% of the bandwidth is used,
37805 not 99%. This is especially important for daily hibernators who
37806 have a small accounting max. Hopefully it will result in fewer
37807 cut connections when the hard hibernation starts.
37808 - Load-balance better when using servers that claim more than
37809 800kB/s of capacity.
37810 - Make NT services work (experimental, only used if compiled in).
37813 Changes in version 0.0.9.3 - 2005-01-21
37814 o Bugfixes on 0.0.9:
37815 - Backport the cpu use fixes from main branch, so busy servers won't
37816 need as much processor time.
37817 - Work better when we go offline and then come back, or when we
37818 run Tor at boot before the network is up. We do this by
37819 optimistically trying to fetch a new directory whenever an
37820 application request comes in and we think we're offline -- the
37821 human is hopefully a good measure of when the network is back.
37822 - Backport some minimal hidserv bugfixes: keep rend circuits open as
37823 long as you keep using them; actually publish hidserv descriptors
37824 shortly after they change, rather than waiting 20-40 minutes.
37825 - Enable Mac startup script by default.
37826 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
37827 - When you update AllowUnverifiedNodes or FirewallPorts via the
37828 controller's setconf feature, we were always appending, never
37830 - When you update HiddenServiceDir via setconf, it was screwing up
37831 the order of reading the lines, making it fail.
37832 - Do not rewrite a cached directory back to the cache; otherwise we
37833 will think it is recent and not fetch a newer one on startup.
37834 - Workaround for webservers that lie about Content-Encoding: Tor
37835 now tries to autodetect compressed directories and compression
37836 itself. This lets us Proxypass dir fetches through apache.
37839 Changes in version 0.0.9.2 - 2005-01-04
37840 o Bugfixes on 0.0.9 (crashes and asserts):
37841 - Fix an assert on startup when the disk is full and you're logging
37843 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
37844 style address, then we'd crash.
37845 - Fix an assert trigger when the running-routers string we get from
37846 a dirserver is broken.
37847 - Make worker threads start and run on win32. Now win32 servers
37849 - Bandaid (not actually fix, but now it doesn't crash) an assert
37850 where the dns worker dies mysteriously and the main Tor process
37851 doesn't remember anything about the address it was resolving.
37853 o Bugfixes on 0.0.9 (Win32):
37854 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
37855 name out of the warning/assert messages.
37856 - Fix a superficial "unhandled error on read" bug on win32.
37857 - The win32 installer no longer requires a click-through for our
37858 license, since our Free Software license grants rights but does not
37860 - Win32: When connecting to a dirserver fails, try another one
37861 immediately. (This was already working for non-win32 Tors.)
37862 - Stop trying to parse $HOME on win32 when hunting for default
37864 - Make tor-resolve.c work on win32 by calling network_init().
37866 o Bugfixes on 0.0.9 (other):
37867 - Make 0.0.9.x build on Solaris again.
37868 - Due to a fencepost error, we were blowing away the \n when reporting
37869 confvalue items in the controller. So asking for multiple config
37870 values at once couldn't work.
37871 - When listing circuits that are pending on an opening OR connection,
37872 if we're an OR we were listing circuits that *end* at us as
37873 being pending on every listener, dns/cpu worker, etc. Stop that.
37874 - Dirservers were failing to create 'running-routers' or 'directory'
37875 strings if we had more than some threshold of routers. Fix them so
37876 they can handle any number of routers.
37877 - Fix a superficial "Duplicate mark for close" bug.
37878 - Stop checking for clock skew for OR connections, even for servers.
37879 - Fix a fencepost error that was chopping off the last letter of any
37880 nickname that is the maximum allowed nickname length.
37881 - Update URLs in log messages so they point to the new website.
37882 - Fix a potential problem in mangling server private keys while
37883 writing to disk (not triggered yet, as far as we know).
37884 - Include the licenses for other free software we include in Tor,
37885 now that we're shipping binary distributions more regularly.
37888 Changes in version 0.0.9.1 - 2004-12-15
37889 o Bugfixes on 0.0.9:
37890 - Make hibernation actually work.
37891 - Make HashedControlPassword config option work.
37892 - When we're reporting event circuit status to a controller,
37893 don't use the stream status code.
37896 Changes in version 0.0.9 - 2004-12-12
37898 - Clean up manpage and torrc.sample file.
37899 - Clean up severities and text of log warnings.
37901 - Make servers trigger an assert when they enter hibernation.
37904 Changes in version 0.0.9rc7 - 2004-12-08
37905 o Bugfixes on 0.0.9rc:
37906 - Fix a stack-trashing crash when an exit node begins hibernating.
37907 - Avoid looking at unallocated memory while considering which
37908 ports we need to build circuits to cover.
37909 - Stop a sigpipe: when an 'end' cell races with eof from the app,
37910 we shouldn't hold-open-until-flush if the eof arrived first.
37911 - Fix a bug with init_cookie_authentication() in the controller.
37912 - When recommending new-format log lines, if the upper bound is
37913 LOG_ERR, leave it implicit.
37915 o Bugfixes on 0.0.8.1:
37916 - Fix a whole slew of memory leaks.
37917 - Fix isspace() and friends so they still make Solaris happy
37918 but also so they don't trigger asserts on win32.
37919 - Fix parse_iso_time on platforms without strptime (eg win32).
37920 - win32: tolerate extra "readable" events better.
37921 - win32: when being multithreaded, leave parent fdarray open.
37922 - Make unit tests work on win32.
37925 Changes in version 0.0.9rc6 - 2004-12-06
37926 o Bugfixes on 0.0.9pre:
37927 - Clean up some more integer underflow opportunities (not exploitable
37929 - While hibernating, hup should not regrow our listeners.
37930 - Send an end to the streams we close when we hibernate, rather
37931 than just chopping them off.
37932 - React to eof immediately on non-open edge connections.
37934 o Bugfixes on 0.0.8.1:
37935 - Calculate timeout for waiting for a connected cell from the time
37936 we sent the begin cell, not from the time the stream started. If
37937 it took a long time to establish the circuit, we would time out
37938 right after sending the begin cell.
37939 - Fix router_compare_addr_to_addr_policy: it was not treating a port
37940 of * as always matching, so we were picking reject *:* nodes as
37941 exit nodes too. Oops.
37944 - New circuit building strategy: keep a list of ports that we've
37945 used in the past 6 hours, and always try to have 2 circuits open
37946 or on the way that will handle each such port. Seed us with port
37947 80 so web users won't complain that Tor is "slow to start up".
37948 - Make kill -USR1 dump more useful stats about circuits.
37949 - When warning about retrying or giving up, print the address, so
37950 the user knows which one it's talking about.
37951 - If you haven't used a clean circuit in an hour, throw it away,
37952 just to be on the safe side. (This means after 6 hours a totally
37953 unused Tor client will have no circuits open.)
37956 Changes in version 0.0.9rc5 - 2004-12-01
37957 o Bugfixes on 0.0.8.1:
37958 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
37959 - Let resolve conns retry/expire also, rather than sticking around
37961 - If we are using select, make sure we stay within FD_SETSIZE.
37963 o Bugfixes on 0.0.9pre:
37964 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
37965 but doesn't seem to be currently; thanks to Ilja van Sprundel for
37967 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
37968 instead. Impose minima and maxima for all *Period options; impose
37969 even tighter maxima for fetching if we are a caching dirserver.
37970 Clip rather than rejecting.
37971 - Fetch cached running-routers from servers that serve it (that is,
37972 authdirservers and servers running 0.0.9rc5-cvs or later.)
37975 - Accept *:706 (silc) in default exit policy.
37976 - Implement new versioning format for post 0.1.
37977 - Support "foo.nickname.exit" addresses, to let Alice request the
37978 address "foo" as viewed by exit node "nickname". Based on a patch
37980 - Make tor --version --version dump the cvs Id of every file.
37983 Changes in version 0.0.9rc4 - 2004-11-28
37984 o Bugfixes on 0.0.8.1:
37985 - Make windows sockets actually non-blocking (oops), and handle
37986 win32 socket errors better.
37988 o Bugfixes on 0.0.9rc1:
37989 - Actually catch the -USR2 signal.
37992 Changes in version 0.0.9rc3 - 2004-11-25
37993 o Bugfixes on 0.0.8.1:
37994 - Flush the log file descriptor after we print "Tor opening log file",
37995 so we don't see those messages days later.
37997 o Bugfixes on 0.0.9rc1:
37998 - Make tor-resolve work again.
37999 - Avoid infinite loop in tor-resolve if tor hangs up on it.
38000 - Fix an assert trigger for clients/servers handling resolves.
38003 Changes in version 0.0.9rc2 - 2004-11-24
38004 o Bugfixes on 0.0.9rc1:
38005 - I broke socks5 support while fixing the eof bug.
38006 - Allow unitless bandwidths and intervals; they default to bytes
38008 - New servers don't start out hibernating; they are active until
38009 they run out of bytes, so they have a better estimate of how
38010 long it takes, and so their operators can know they're working.
38013 Changes in version 0.0.9rc1 - 2004-11-23
38014 o Bugfixes on 0.0.8.1:
38015 - Finally fix a bug that's been plaguing us for a year:
38016 With high load, circuit package window was reaching 0. Whenever
38017 we got a circuit-level sendme, we were reading a lot on each
38018 socket, but only writing out a bit. So we would eventually reach
38019 eof. This would be noticed and acted on even when there were still
38020 bytes sitting in the inbuf.
38021 - When poll() is interrupted, we shouldn't believe the revents values.
38023 o Bugfixes on 0.0.9pre6:
38024 - Fix hibernate bug that caused pre6 to be broken.
38025 - Don't keep rephist info for routers that haven't had activity for
38026 24 hours. (This matters now that clients have keys, since we track
38028 - Never call close_temp_logs while validating log options.
38029 - Fix backslash-escaping on tor.sh.in and torctl.in.
38032 - Implement weekly/monthly/daily accounting: now you specify your
38033 hibernation properties by
38034 AccountingMax N bytes|KB|MB|GB|TB
38035 AccountingStart day|week|month [day] HH:MM
38036 Defaults to "month 1 0:00".
38037 - Let bandwidth and interval config options be specified as 5 bytes,
38038 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
38039 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
38040 get back to normal.)
38041 - If your requested entry or exit node has advertised bandwidth 0,
38043 - Be more greedy about filling up relay cells -- we try reading again
38044 once we've processed the stuff we read, in case enough has arrived
38045 to fill the last cell completely.
38046 - Apply NT service patch from Osamu Fujino. Still needs more work.
38049 Changes in version 0.0.9pre6 - 2004-11-15
38050 o Bugfixes on 0.0.8.1:
38051 - Fix assert failure on malformed socks4a requests.
38052 - Use identity comparison, not nickname comparison, to choose which
38053 half of circuit-ID-space each side gets to use. This is needed
38054 because sometimes we think of a router as a nickname, and sometimes
38055 as a hex ID, and we can't predict what the other side will do.
38056 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
38057 write() call will fail and we handle it there.
38058 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
38059 and smartlist_len, which are two major profiling offenders.
38061 o Bugfixes on 0.0.9pre5:
38062 - Fix a bug in read_all that was corrupting config files on windows.
38063 - When we're raising the max number of open file descriptors to
38064 'unlimited', don't log that we just raised it to '-1'.
38065 - Include event code with events, as required by control-spec.txt.
38066 - Don't give a fingerprint when clients do --list-fingerprint:
38067 it's misleading, because it will never be the same again.
38068 - Stop using strlcpy in tor_strndup, since it was slowing us
38070 - Remove warn on startup about missing cached-directory file.
38071 - Make kill -USR1 work again.
38072 - Hibernate if we start tor during the "wait for wakeup-time" phase
38073 of an accounting interval. Log our hibernation plans better.
38074 - Authoritative dirservers now also cache their directory, so they
38075 have it on start-up.
38078 - Fetch running-routers; cache running-routers; compress
38079 running-routers; serve compressed running-routers.z
38080 - Add NSI installer script contributed by J Doe.
38081 - Commit VC6 and VC7 workspace/project files.
38082 - Commit a tor.spec for making RPM files, with help from jbash.
38083 - Add contrib/torctl.in contributed by Glenn Fink.
38084 - Implement the control-spec's SAVECONF command, to write your
38085 configuration to torrc.
38086 - Get cookie authentication for the controller closer to working.
38087 - Include control-spec.txt in the tarball.
38088 - When set_conf changes our server descriptor, upload a new copy.
38089 But don't upload it too often if there are frequent changes.
38090 - Document authentication config in man page, and document signals
38092 - Clean up confusing parts of man page and torrc.sample.
38093 - Make expand_filename handle ~ and ~username.
38094 - Use autoconf to enable largefile support where necessary. Use
38095 ftello where available, since ftell can fail at 2GB.
38096 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
38097 log more informatively.
38098 - Give a slightly more useful output for "tor -h".
38099 - Refuse application socks connections to port 0.
38100 - Check clock skew for verified servers, but allow unverified
38101 servers and clients to have any clock skew.
38102 - Break DirFetchPostPeriod into:
38103 - DirFetchPeriod for fetching full directory,
38104 - StatusFetchPeriod for fetching running-routers,
38105 - DirPostPeriod for posting server descriptor,
38106 - RendPostPeriod for posting hidden service descriptors.
38107 - Make sure the hidden service descriptors are at a random offset
38108 from each other, to hinder linkability.
38111 Changes in version 0.0.9pre5 - 2004-11-09
38112 o Bugfixes on 0.0.9pre4:
38113 - Fix a seg fault in unit tests (doesn't affect main program).
38114 - Fix an assert bug where a hidden service provider would fail if
38115 the first hop of his rendezvous circuit was down.
38116 - Hidden service operators now correctly handle version 1 style
38117 INTRODUCE1 cells (nobody generates them still, so not a critical
38119 - If do_hup fails, actually notice.
38120 - Handle more errnos from accept() without closing the listener.
38121 Some OpenBSD machines were closing their listeners because
38122 they ran out of file descriptors.
38123 - Send resolve cells to exit routers that are running a new
38124 enough version of the resolve code to work right.
38125 - Better handling of winsock includes on non-MSV win32 compilers.
38126 - Some people had wrapped their tor client/server in a script
38127 that would restart it whenever it died. This did not play well
38128 with our "shut down if your version is obsolete" code. Now people
38129 don't fetch a new directory if their local cached version is
38131 - Make our autogen.sh work on ksh as well as bash.
38134 - Hibernation: New config option "AccountingMaxKB" lets you
38135 set how many KBytes per month you want to allow your server to
38136 consume. Rather than spreading those bytes out evenly over the
38137 month, we instead hibernate for some of the month and pop up
38138 at a deterministic time, work until the bytes are consumed, then
38139 hibernate again. Config option "MonthlyAccountingStart" lets you
38140 specify which day of the month your billing cycle starts on.
38141 - Control interface: a separate program can now talk to your
38142 client/server over a socket, and get/set config options, receive
38143 notifications of circuits and streams starting/finishing/dying,
38144 bandwidth used, etc. The next step is to get some GUIs working.
38145 Let us know if you want to help out. See doc/control-spec.txt .
38146 - Ship a contrib/tor-control.py as an example script to interact
38147 with the control port.
38148 - "tor --hash-password zzyxz" will output a salted password for
38149 use in authenticating to the control interface.
38150 - New log format in config:
38151 "Log minsev[-maxsev] stdout|stderr|syslog" or
38152 "Log minsev[-maxsev] file /var/foo"
38155 - DirPolicy config option, to let people reject incoming addresses
38156 from their dirserver.
38157 - "tor --list-fingerprint" will list your identity key fingerprint
38159 - Add "pass" target for RedirectExit, to make it easier to break
38160 out of a sequence of RedirectExit rules.
38161 - Clients now generate a TLS cert too, in preparation for having
38162 them act more like real nodes.
38163 - Ship src/win32/ in the tarball, so people can use it to build.
38164 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
38166 - New "router-status" line in directory, to better bind each verified
38167 nickname to its identity key.
38168 - Deprecate unofficial config option abbreviations, and abbreviations
38169 not on the command line.
38170 - Add a pure-C tor-resolve implementation.
38171 - Use getrlimit and friends to ensure we can reach MaxConn (currently
38172 1024) file descriptors.
38174 o Code security improvements, inspired by Ilja:
38175 - Replace sprintf with snprintf. (I think they were all safe, but
38177 - Replace strcpy/strncpy with strlcpy in more places.
38178 - Avoid strcat; use snprintf or strlcat instead.
38179 - snprintf wrapper with consistent (though not C99) overflow behavior.
38182 Changes in version 0.0.9pre4 - 2004-10-17
38183 o Bugfixes on 0.0.9pre3:
38184 - If the server doesn't specify an exit policy, use the real default
38185 exit policy, not reject *:*.
38186 - Ignore fascistfirewall when uploading/downloading hidden service
38187 descriptors, since we go through Tor for those; and when using
38188 an HttpProxy, since we assume it can reach them all.
38189 - When looking for an authoritative dirserver, use only the ones
38190 configured at boot. Don't bother looking in the directory.
38191 - The rest of the fix for get_default_conf_file() on older win32.
38192 - Make 'Routerfile' config option obsolete.
38195 - New 'MyFamily nick1,...' config option for a server to
38196 specify other servers that shouldn't be used in the same circuit
38197 with it. Only believed if nick1 also specifies us.
38198 - New 'NodeFamily nick1,nick2,...' config option for a client to
38199 specify nodes that it doesn't want to use in the same circuit.
38200 - New 'Redirectexit pattern address:port' config option for a
38201 server to redirect exit connections, e.g. to a local squid.
38204 Changes in version 0.0.9pre3 - 2004-10-13
38205 o Bugfixes on 0.0.8.1:
38206 - Better torrc example lines for dirbindaddress and orbindaddress.
38207 - Improved bounds checking on parsed ints (e.g. config options and
38208 the ones we find in directories.)
38209 - Better handling of size_t vs int, so we're more robust on 64
38211 - Fix the rest of the bug where a newly started OR would appear
38212 as unverified even after we've added his fingerprint and hupped
38214 - Fix a bug from 0.0.7: when read() failed on a stream, we would
38215 close it without sending back an end. So 'connection refused'
38216 would simply be ignored and the user would get no response.
38218 o Bugfixes on 0.0.9pre2:
38219 - Serving the cached-on-disk directory to people is bad. We now
38220 provide no directory until we've fetched a fresh one.
38221 - Workaround for bug on windows where cached-directories get crlf
38223 - Make get_default_conf_file() work on older windows too.
38224 - If we write a *:* exit policy line in the descriptor, don't write
38225 any more exit policy lines.
38228 - Use only 0.0.9pre1 and later servers for resolve cells.
38229 - Make the dirservers file obsolete.
38230 - Include a dir-signing-key token in directories to tell the
38231 parsing entity which key is being used to sign.
38232 - Remove the built-in bulky default dirservers string.
38233 - New config option "Dirserver %s:%d [fingerprint]", which can be
38234 repeated as many times as needed. If no dirservers specified,
38235 default to moria1,moria2,tor26.
38236 - Make moria2 advertise a dirport of 80, so people behind firewalls
38237 will be able to get a directory.
38238 - Http proxy support
38239 - Dirservers translate requests for http://%s:%d/x to /x
38240 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
38241 be routed through this host.
38242 - Clients ask for /tor/x rather than /x for new enough dirservers.
38243 This way we can one day coexist peacefully with apache.
38244 - Clients specify a "Host: %s%d" http header, to be compatible
38245 with more proxies, and so running squid on an exit node can work.
38248 Changes in version 0.0.8.1 - 2004-10-13
38250 - Fix a seg fault that can be triggered remotely for Tor
38251 clients/servers with an open dirport.
38252 - Fix a rare assert trigger, where routerinfos for entries in
38253 our cpath would expire while we're building the path.
38254 - Fix a bug in OutboundBindAddress so it (hopefully) works.
38255 - Fix a rare seg fault for people running hidden services on
38256 intermittent connections.
38257 - Fix a bug in parsing opt keywords with objects.
38258 - Fix a stale pointer assert bug when a stream detaches and
38260 - Fix a string format vulnerability (probably not exploitable)
38261 in reporting stats locally.
38262 - Fix an assert trigger: sometimes launching circuits can fail
38263 immediately, e.g. because too many circuits have failed recently.
38264 - Fix a compile warning on 64 bit platforms.
38267 Changes in version 0.0.9pre2 - 2004-10-03
38269 - Make fetching a cached directory work for 64-bit platforms too.
38270 - Make zlib.h a required header, not an optional header.
38273 Changes in version 0.0.9pre1 - 2004-10-01
38275 - Stop using separate defaults for no-config-file and
38276 empty-config-file. Now you have to explicitly turn off SocksPort,
38277 if you don't want it open.
38278 - Fix a bug in OutboundBindAddress so it (hopefully) works.
38279 - Improve man page to mention more of the 0.0.8 features.
38280 - Fix a rare seg fault for people running hidden services on
38281 intermittent connections.
38282 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
38284 - Fix more dns related bugs: send back resolve_failed and end cells
38285 more reliably when the resolve fails, rather than closing the
38286 circuit and then trying to send the cell. Also attach dummy resolve
38287 connections to a circuit *before* calling dns_resolve(), to fix
38288 a bug where cached answers would never be sent in RESOLVED cells.
38289 - When we run out of disk space, or other log writing error, don't
38290 crash. Just stop logging to that log and continue.
38291 - We were starting to daemonize before we opened our logs, so if
38292 there were any problems opening logs, we would complain to stderr,
38293 which wouldn't work, and then mysteriously exit.
38294 - Fix a rare bug where sometimes a verified OR would connect to us
38295 before he'd uploaded his descriptor, which would cause us to
38296 assign conn->nickname as though he's unverified. Now we look through
38297 the fingerprint list to see if he's there.
38298 - Fix a rare assert trigger, where routerinfos for entries in
38299 our cpath would expire while we're building the path.
38302 - Clients can ask dirservers for /dir.z to get a compressed version
38303 of the directory. Only works for servers running 0.0.9, of course.
38304 - Make clients cache directories and use them to seed their router
38305 lists at startup. This means clients have a datadir again.
38306 - Configuration infrastructure support for warning on obsolete
38308 - Respond to content-encoding headers by trying to uncompress as
38310 - Reply with a deflated directory when a client asks for "dir.z".
38311 We could use allow-encodings instead, but allow-encodings isn't
38312 specified in HTTP 1.0.
38313 - Raise the max dns workers from 50 to 100.
38314 - Discourage people from setting their dirfetchpostperiod more often
38315 than once per minute.
38316 - Protect dirservers from overzealous descriptor uploading -- wait
38317 10 seconds after directory gets dirty, before regenerating.
38320 Changes in version 0.0.8 - 2004-08-25
38321 o Port it to SunOS 5.9 / Athena
38324 Changes in version 0.0.8rc2 - 2004-08-20
38325 o Make it compile on cygwin again.
38326 o When picking unverified routers, skip those with low uptime and/or
38327 low bandwidth, depending on what properties you care about.
38330 Changes in version 0.0.8rc1 - 2004-08-18
38331 o Changes from 0.0.7.3:
38333 - Fix assert triggers: if the other side returns an address 0.0.0.0,
38334 don't put it into the client dns cache.
38335 - If a begin failed due to exit policy, but we believe the IP address
38336 should have been allowed, switch that router to exitpolicy reject *:*
38337 until we get our next directory.
38339 - Clients choose nodes proportional to advertised bandwidth.
38340 - Avoid using nodes with low uptime as introduction points.
38341 - Handle servers with dynamic IP addresses: don't replace
38342 options->Address with the resolved one at startup, and
38343 detect our address right before we make a routerinfo each time.
38344 - 'FascistFirewall' option to pick dirservers and ORs on specific
38345 ports; plus 'FirewallPorts' config option to tell FascistFirewall
38346 which ports are open. (Defaults to 80,443)
38347 - Be more aggressive about trying to make circuits when the network
38348 has changed (e.g. when you unsuspend your laptop).
38349 - Check for time skew on http headers; report date in response to
38351 - If the entrynode config line has only one node, don't pick it as
38353 - Add strict{entry|exit}nodes config options. If set to 1, then
38354 we refuse to build circuits that don't include the specified entry
38356 - OutboundBindAddress config option, to bind to a specific
38357 IP address for outgoing connect()s.
38358 - End truncated log entries (e.g. directories) with "[truncated]".
38360 o Patches to 0.0.8preX:
38362 - Patches to compile and run on win32 again (maybe)?
38363 - Fix crash when looking for ~/.torrc with no $HOME set.
38364 - Fix a race bug in the unit tests.
38365 - Handle verified/unverified name collisions better when new
38366 routerinfo's arrive in a directory.
38367 - Sometimes routers were getting entered into the stats before
38368 we'd assigned their identity_digest. Oops.
38369 - Only pick and establish intro points after we've gotten a
38372 - AllowUnverifiedNodes config option to let circuits choose no-name
38373 routers in entry,middle,exit,introduction,rendezvous positions.
38374 Allow middle and rendezvous positions by default.
38375 - Add a man page for tor-resolve.
38378 Changes in version 0.0.7.3 - 2004-08-12
38379 o Stop dnsworkers from triggering an assert failure when you
38380 ask them to resolve the host "".
38383 Changes in version 0.0.8pre3 - 2004-08-09
38384 o Changes from 0.0.7.2:
38385 - Allow multiple ORs with same nickname in routerlist -- now when
38386 people give us one identity key for a nickname, then later
38387 another, we don't constantly complain until the first expires.
38388 - Remember used bandwidth (both in and out), and publish 15-minute
38389 snapshots for the past day into our descriptor.
38390 - You can now fetch $DIRURL/running-routers to get just the
38391 running-routers line, not the whole descriptor list. (But
38392 clients don't use this yet.)
38393 - When people mistakenly use Tor as an http proxy, point them
38394 at the tor-doc.html rather than the INSTALL.
38395 - Remove our mostly unused -- and broken -- hex_encode()
38396 function. Use base16_encode() instead. (Thanks to Timo Lindfors
38397 for pointing out this bug.)
38398 - Rotate onion keys every 12 hours, not every 2 hours, so we have
38399 fewer problems with people using the wrong key.
38400 - Change the default exit policy to reject the default edonkey,
38401 kazaa, gnutella ports.
38402 - Add replace_file() to util.[ch] to handle win32's rename().
38404 o Changes from 0.0.8preX:
38405 - Fix two bugs in saving onion keys to disk when rotating, so
38406 hopefully we'll get fewer people using old onion keys.
38407 - Fix an assert error that was making SocksPolicy not work.
38408 - Be willing to expire routers that have an open dirport -- it's
38409 just the authoritative dirservers we want to not forget.
38410 - Reject tor-resolve requests for .onion addresses early, so we
38411 don't build a whole rendezvous circuit and then fail.
38412 - When you're warning a server that he's unverified, don't cry
38413 wolf unpredictably.
38414 - Fix a race condition: don't try to extend onto a connection
38415 that's still handshaking.
38416 - For servers in clique mode, require the conn to be open before
38417 you'll choose it for your path.
38418 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
38419 end relay cell, etc.
38420 - Measure bandwidth capacity over the last 24 hours, not just 12
38421 - Bugfix: authoritative dirservers were making and signing a new
38422 directory for each client, rather than reusing the cached one.
38425 Changes in version 0.0.8pre2 - 2004-08-04
38426 o Changes from 0.0.7.2:
38428 - Check directory signature _before_ you decide whether you're
38429 you're running an obsolete version and should exit.
38430 - Check directory signature _before_ you parse the running-routers
38431 list to decide who's running or verified.
38432 - Bugfixes and features:
38433 - Check return value of fclose while writing to disk, so we don't
38434 end up with broken files when servers run out of disk space.
38435 - Log a warning if the user uses an unsafe socks variant, so people
38436 are more likely to learn about privoxy or socat.
38437 - Dirservers now include RFC1123-style dates in the HTTP headers,
38438 which one day we will use to better detect clock skew.
38440 o Changes from 0.0.8pre1:
38441 - Make it compile without warnings again on win32.
38442 - Log a warning if you're running an unverified server, to let you
38443 know you might want to get it verified.
38444 - Only pick a default nickname if you plan to be a server.
38447 Changes in version 0.0.8pre1 - 2004-07-23
38449 - Made our unit tests compile again on OpenBSD 3.5, and tor
38450 itself compile again on OpenBSD on a sparc64.
38451 - We were neglecting milliseconds when logging on win32, so
38452 everything appeared to happen at the beginning of each second.
38454 o Protocol changes:
38455 - 'Extend' relay cell payloads now include the digest of the
38456 intended next hop's identity key. Now we can verify that we're
38457 extending to the right router, and also extend to routers we
38458 hadn't heard of before.
38461 - Tor nodes can now act as relays (with an advertised ORPort)
38462 without being manually verified by the dirserver operators.
38463 - Uploaded descriptors of unverified routers are now accepted
38464 by the dirservers, and included in the directory.
38465 - Verified routers are listed by nickname in the running-routers
38466 list; unverified routers are listed as "$<fingerprint>".
38467 - We now use hash-of-identity-key in most places rather than
38468 nickname or addr:port, for improved security/flexibility.
38469 - To avoid Sybil attacks, paths still use only verified servers.
38470 But now we have a chance to play around with hybrid approaches.
38471 - Nodes track bandwidth usage to estimate capacity (not used yet).
38472 - ClientOnly option for nodes that never want to become servers.
38473 - Directory caching.
38474 - "AuthoritativeDir 1" option for the official dirservers.
38475 - Now other nodes (clients and servers) will cache the latest
38476 directory they've pulled down.
38477 - They can enable their DirPort to serve it to others.
38478 - Clients will pull down a directory from any node with an open
38479 DirPort, and check the signature/timestamp correctly.
38480 - Authoritative dirservers now fetch directories from other
38481 authdirservers, to stay better synced.
38482 - Running-routers list tells who's down also, along with noting
38483 if they're verified (listed by nickname) or unverified (listed
38485 - Allow dirservers to serve running-router list separately.
38486 This isn't used yet.
38487 - ORs connect-on-demand to other ORs
38488 - If you get an extend cell to an OR you're not connected to,
38489 connect, handshake, and forward the create cell.
38490 - The authoritative dirservers stay connected to everybody,
38491 and everybody stays connected to 0.0.7 servers, but otherwise
38492 clients/servers expire unused connections after 5 minutes.
38493 - When servers get a sigint, they delay 30 seconds (refusing new
38494 connections) then exit. A second sigint causes immediate exit.
38495 - File and name management:
38496 - Look for .torrc if no CONFDIR "torrc" is found.
38497 - If no datadir is defined, then choose, make, and secure ~/.tor
38499 - If torrc not found, exitpolicy reject *:*.
38500 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
38501 - If no nickname is defined, derive default from hostname.
38502 - Rename secret key files, e.g. identity.key -> secret_id_key,
38503 to discourage people from mailing their identity key to tor-ops.
38504 - Refuse to build a circuit before the directory has arrived --
38505 it won't work anyway, since you won't know the right onion keys
38507 - Try other dirservers immediately if the one you try is down. This
38508 should tolerate down dirservers better now.
38509 - Parse tor version numbers so we can do an is-newer-than check
38510 rather than an is-in-the-list check.
38511 - New socks command 'resolve', to let us shim gethostbyname()
38513 - A 'tor_resolve' script to access the socks resolve functionality.
38514 - A new socks-extensions.txt doc file to describe our
38515 interpretation and extensions to the socks protocols.
38516 - Add a ContactInfo option, which gets published in descriptor.
38517 - Publish OR uptime in descriptor (and thus in directory) too.
38518 - Write tor version at the top of each log file
38519 - New docs in the tarball:
38521 - Document that you should proxy your SSL traffic too.
38524 Changes in version 0.0.7.2 - 2004-07-07
38525 o A better fix for the 0.0.0.0 problem, that will hopefully
38526 eliminate the remaining related assertion failures.
38529 Changes in version 0.0.7.1 - 2004-07-04
38530 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
38531 since internally we use 0.0.0.0 to signify "not yet resolved".
38534 Changes in version 0.0.7 - 2004-06-07
38535 o Updated the man page to reflect the new features.
38538 Changes in version 0.0.7rc2 - 2004-06-06
38539 o Changes from 0.0.7rc1:
38540 - Make it build on Win32 again.
38541 o Changes from 0.0.6.2:
38542 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
38546 Changes in version 0.0.7rc1 - 2004-06-02
38548 - On sighup, we were adding another log without removing the first
38549 one. So log messages would get duplicated n times for n sighups.
38550 - Several cases of using a connection after we'd freed it. The
38551 problem was that connections that are pending resolve are in both
38552 the pending_resolve tree, and also the circuit's resolving_streams
38553 list. When you want to remove one, you must remove it from both.
38554 - Fix a double-mark-for-close where an end cell arrived for a
38555 resolving stream, and then the resolve failed.
38556 - Check directory signatures based on name of signer, not on whom
38557 we got the directory from. This will let us cache directories more
38560 - Crank up some of our constants to handle more users.
38563 Changes in version 0.0.7pre1 - 2004-06-02
38564 o Fixes for crashes and other obnoxious bugs:
38565 - Fix an epipe bug: sometimes when directory connections failed
38566 to connect, we would give them a chance to flush before closing
38568 - When we detached from a circuit because of resolvefailed, we
38569 would immediately try the same circuit twice more, and then
38570 give up on the resolve thinking we'd tried three different
38572 - Limit the number of intro circuits we'll attempt to build for a
38573 hidden service per 15-minute period.
38574 - Check recommended-software string *early*, before actually parsing
38575 the directory. Thus we can detect an obsolete version and exit,
38576 even if the new directory format doesn't parse.
38577 o Fixes for security bugs:
38578 - Remember which nodes are dirservers when you startup, and if a
38579 random OR enables his dirport, don't automatically assume he's
38580 a trusted dirserver.
38582 - Directory connections were asking the wrong poll socket to
38583 start writing, and not asking themselves to start writing.
38584 - When we detached from a circuit because we sent a begin but
38585 didn't get a connected, we would use it again the first time;
38586 but after that we would correctly switch to a different one.
38587 - Stop warning when the first onion decrypt attempt fails; they
38588 will sometimes legitimately fail now that we rotate keys.
38589 - Override unaligned-access-ok check when $host_cpu is ia64 or
38590 arm. Apparently they allow it but the kernel whines.
38591 - Dirservers try to reconnect periodically too, in case connections
38593 - Fix some memory leaks in directory servers.
38594 - Allow backslash in Win32 filenames.
38595 - Made Tor build complain-free on FreeBSD, hopefully without
38596 breaking other BSD builds. We'll see.
38598 - Doxygen markup on all functions and global variables.
38599 - Make directory functions update routerlist, not replace it. So
38600 now directory disagreements are not so critical a problem.
38601 - Remove the upper limit on number of descriptors in a dirserver's
38602 directory (not that we were anywhere close).
38603 - Allow multiple logfiles at different severity ranges.
38604 - Allow *BindAddress to specify ":port" rather than setting *Port
38605 separately. Allow multiple instances of each BindAddress config
38606 option, so you can bind to multiple interfaces if you want.
38607 - Allow multiple exit policy lines, which are processed in order.
38608 Now we don't need that huge line with all the commas in it.
38609 - Enable accept/reject policies on SOCKS connections, so you can bind
38610 to 0.0.0.0 but still control who can use your OP.
38613 Changes in version 0.0.6.2 - 2004-05-16
38614 o Our integrity-checking digest was checking only the most recent cell,
38615 not the previous cells like we'd thought.
38616 Thanks to Stefan Mark for finding the flaw!
38619 Changes in version 0.0.6.1 - 2004-05-06
38620 o Fix two bugs in our AES counter-mode implementation (this affected
38621 onion-level stream encryption, but not TLS-level). It turns
38622 out we were doing something much more akin to a 16-character
38623 polyalphabetic cipher. Oops.
38624 Thanks to Stefan Mark for finding the flaw!
38625 o Retire moria3 as a directory server, and add tor26 as a directory
38629 Changes in version 0.0.6 - 2004-05-02
38630 [version bump only]
38633 Changes in version 0.0.6rc4 - 2004-05-01
38634 o Update the built-in dirservers list to use the new directory format
38635 o Fix a rare seg fault: if a node offering a hidden service attempts
38636 to build a circuit to Alice's rendezvous point and fails before it
38637 reaches the last hop, it retries with a different circuit, but
38639 o Handle windows socket errors correctly.
38642 Changes in version 0.0.6rc3 - 2004-04-28
38643 o Don't expire non-general excess circuits (if we had enough
38644 circuits open, we were expiring rendezvous circuits -- even
38645 when they had a stream attached. oops.)
38646 o Fetch randomness from /dev/urandom better (not via fopen/fread)
38647 o Better debugging for tls errors
38648 o Some versions of openssl have an SSL_pending function that erroneously
38649 returns bytes when there is a non-application record pending.
38650 o Set Content-Type on the directory and hidserv descriptor.
38651 o Remove IVs from cipher code, since AES-ctr has none.
38652 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
38653 o We were using an array of length zero in a few places.
38654 o win32's gethostbyname can't resolve an IP to an IP.
38655 o win32's close can't close a socket.
38658 Changes in version 0.0.6rc2 - 2004-04-26
38659 o Fix a bug where we were closing tls connections intermittently.
38660 It turns out openssl keeps its errors around -- so if an error
38661 happens, and you don't ask about it, and then another openssl
38662 operation happens and succeeds, and you ask if there was an error,
38663 it tells you about the first error. Fun fun.
38664 o Fix a bug that's been lurking since 27 may 03 (!)
38665 When passing back a destroy cell, we would use the wrong circ id.
38666 'Mostly harmless', but still worth fixing.
38667 o Since we don't support truncateds much, don't bother sending them;
38668 just close the circ.
38669 o check for <machine/limits.h> so we build on NetBSD again (I hope).
38670 o don't crash if a conn that sent a begin has suddenly lost its circuit
38671 (this was quite rare).
38674 Changes in version 0.0.6rc1 - 2004-04-25
38675 o We now rotate link (tls context) keys and onion keys.
38676 o CREATE cells now include oaep padding, so you can tell
38677 if you decrypted them correctly.
38678 o Add bandwidthburst to server descriptor.
38679 o Directories now say which dirserver signed them.
38680 o Use a tor_assert macro that logs failed assertions too.
38683 Changes in version 0.0.6pre5 - 2004-04-18
38684 o changes from 0.0.6pre4:
38685 - make tor build on broken freebsd 5.2 installs
38686 - fix a failed assert when you try an intro point, get a nack, and try
38687 a second one and it works.
38688 - when alice uses a port that the hidden service doesn't accept,
38689 it now sends back an end cell (denied by exit policy). otherwise
38690 alice would just have to wait to time out.
38691 - fix another rare bug: when we had tried all the intro
38692 points for a hidden service, we fetched the descriptor
38693 again, but we left our introcirc thinking it had already
38694 sent an intro, so it kept waiting for a response...
38695 - bugfix: when you sleep your hidden-service laptop, as soon
38696 as it wakes up it tries to upload a service descriptor, but
38697 socketpair fails for some reason (localhost not up yet?).
38698 now we simply give up on that upload, and we'll try again later.
38699 i'd still like to find the bug though.
38700 - if an intro circ waiting for an ack dies before getting one, then
38702 - we were reusing stale service descriptors and refetching usable
38706 Changes in version 0.0.6pre4 - 2004-04-14
38707 o changes from 0.0.6pre3:
38708 - when bob fails to connect to the rendezvous point, and his
38709 circ didn't fail because of the rendezvous point itself, then
38710 he retries a couple of times
38711 - we expire introduction and rendezvous circs more thoroughly
38712 (sometimes they were hanging around forever)
38713 - we expire unattached rendezvous streams that have been around
38714 too long (they were sticking around forever).
38715 - fix a measly fencepost error that was crashing everybody with
38719 Changes in version 0.0.6pre3 - 2004-04-14
38720 o changes from 0.0.6pre2:
38721 - make hup work again
38722 - fix some memory leaks for dirservers
38723 - allow more skew in rendezvous descriptor timestamps, to help
38724 handle people like blanu who don't know what time it is
38725 - normal circs are 3 hops, but some rend/intro circs are 4, if
38726 the initiator doesn't get to choose the last hop
38727 - send acks for introductions, so alice can know whether to try
38729 - bob publishes intro points more correctly
38730 o changes from 0.0.5:
38731 - fix an assert trigger that's been plaguing us since the days
38732 of 0.0.2prexx (thanks weasel!)
38733 - retry stream correctly when we fail to connect because of
38734 exit-policy-reject (should try another) or can't-resolve-address
38735 (also should try another, because dns on random internet servers
38737 - when we hup a dirserver and we've *removed* a server from the
38738 approved-routers list, now we remove that server from the
38739 in-memory directories too
38742 Changes in version 0.0.6pre2 - 2004-04-08
38743 o We fixed our base32 implementation. Now it works on all architectures.
38746 Changes in version 0.0.6pre1 - 2004-04-08
38748 - Hidden services and rendezvous points are implemented. Go to
38749 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
38750 hidden services. (This only works via a socks4a proxy such as
38751 Privoxy, and currently it's quite slow.)
38754 Changes in version 0.0.5 - 2004-03-30
38755 [version bump only]
38758 Changes in version 0.0.5rc3 - 2004-03-29
38759 o Install torrc as torrc.sample -- we no longer clobber your
38761 o Re-enable recommendedversion checking (we broke it in rc2, oops)
38762 o Add in a 'notice' log level for things the operator should hear
38763 but that aren't warnings
38766 Changes in version 0.0.5rc2 - 2004-03-29
38767 o Hold socks connection open until reply is flushed (if possible)
38768 o Make exit nodes resolve IPs to IPs immediately, rather than asking
38769 the dns farm to do it.
38770 o Fix c99 aliasing warnings in rephist.c
38771 o Don't include server descriptors that are older than 24 hours in the
38773 o Give socks 'reject' replies their whole 15s to attempt to flush,
38774 rather than seeing the 60s timeout and assuming the flush had failed.
38775 o Clean automake droppings from the cvs repository
38778 Changes in version 0.0.5rc1 - 2004-03-28
38779 o Fix mangled-state bug in directory fetching (was causing sigpipes).
38780 o Only build circuits after we've fetched the directory: clients were
38781 using only the directory servers before they'd fetched a directory.
38782 This also means longer startup time; so it goes.
38783 o Fix an assert trigger where an OP would fail to handshake, and we'd
38784 expect it to have a nickname.
38785 o Work around a tsocks bug: do a socks reject when AP connection dies
38786 early, else tsocks goes into an infinite loop.
38789 Changes in version 0.0.4 - 2004-03-26
38790 o When connecting to a dirserver or OR and the network is down,
38794 Changes in version 0.0.3 - 2004-03-26
38795 o Warn and fail if server chose a nickname with illegal characters
38796 o Port to Solaris and Sparc:
38797 - include missing header fcntl.h
38798 - have autoconf find -lsocket -lnsl automatically
38799 - deal with hardware word alignment
38800 - make uname() work (solaris has a different return convention)
38801 - switch from using signal() to sigaction()
38802 o Preliminary work on reputation system:
38803 - Keep statistics on success/fail of connect attempts; they're published
38804 by kill -USR1 currently.
38805 - Add a RunTesting option to try to learn link state by creating test
38806 circuits, even when SocksPort is off.
38807 - Remove unused open circuits when there are too many.
38810 Changes in version 0.0.2 - 2004-03-19
38811 - Include strlcpy and strlcat for safer string ops
38812 - define INADDR_NONE so we compile (but still not run) on solaris
38815 Changes in version 0.0.2pre27 - 2004-03-14
38817 - Allow internal tor networks (we were rejecting internal IPs,
38818 now we allow them if they're set explicitly).
38819 - And fix a few endian issues.
38822 Changes in version 0.0.2pre26 - 2004-03-14
38824 - If a stream times out after 15s without a connected cell, don't
38825 try that circuit again: try a new one.
38826 - Retry streams at most 4 times. Then give up.
38827 - When a dirserver gets a descriptor from an unknown router, it
38828 logs its fingerprint (so the dirserver operator can choose to
38829 accept it even without mail from the server operator).
38830 - Inform unapproved servers when we reject their descriptors.
38831 - Make tor build on Windows again. It works as a client, who knows
38833 - Clearer instructions in the torrc for how to set up a server.
38834 - Be more efficient about reading fd's when our global token bucket
38835 (used for rate limiting) becomes empty.
38837 - Stop asserting that computers always go forward in time. It's
38839 - When we sent a cell (e.g. destroy) and then marked an OR connection
38840 expired, we might close it before finishing a flush if the other
38841 side isn't reading right then.
38842 - Don't allow dirservers to start if they haven't defined
38843 RecommendedVersions
38844 - We were caching transient dns failures. Oops.
38845 - Prevent servers from publishing an internal IP as their address.
38846 - Address a strcat vulnerability in circuit.c
38849 Changes in version 0.0.2pre25 - 2004-03-04
38851 - Put the OR's IP in its router descriptor, not its fqdn. That way
38852 we'll stop being stalled by gethostbyname for nodes with flaky dns,
38855 - If the user typed in an address that didn't resolve, the server
38859 Changes in version 0.0.2pre24 - 2004-03-03
38861 - Fix an assertion failure in dns.c, where we were trying to dequeue
38862 a pending dns resolve even if it wasn't pending
38863 - Fix a spurious socks5 warning about still trying to write after the
38864 connection is finished.
38865 - Hold certain marked_for_close connections open until they're finished
38866 flushing, rather than losing bytes by closing them too early.
38867 - Correctly report the reason for ending a stream
38868 - Remove some duplicate calls to connection_mark_for_close
38869 - Put switch_id and start_daemon earlier in the boot sequence, so it
38870 will actually try to chdir() to options.DataDirectory
38871 - Make 'make test' exit(1) if a test fails; fix some unit tests
38872 - Make tor fail when you use a config option it doesn't know about,
38873 rather than warn and continue.
38874 - Make --version work
38875 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
38878 Changes in version 0.0.2pre23 - 2004-02-29
38880 - Print a statement when the first circ is finished, so the user
38881 knows it's working.
38882 - If a relay cell is unrecognized at the end of the circuit,
38883 send back a destroy. (So attacks to mutate cells are more
38885 - New config option 'excludenodes' to avoid certain nodes for circuits.
38886 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
38887 so you can collect coredumps there.
38889 - Fix a bug in tls flushing where sometimes data got wedged and
38890 didn't flush until more data got sent. Hopefully this bug was
38891 a big factor in the random delays we were seeing.
38892 - Make 'connected' cells include the resolved IP, so the client
38893 dns cache actually gets populated.
38894 - Disallow changing from ORPort=0 to ORPort>0 on hup.
38895 - When we time-out on a stream and detach from the circuit, send an
38896 end cell down it first.
38897 - Only warn about an unknown router (in exitnodes, entrynodes,
38898 excludenodes) after we've fetched a directory.
38901 Changes in version 0.0.2pre22 - 2004-02-26
38903 - Servers publish less revealing uname information in descriptors.
38904 - More memory tracking and assertions, to crash more usefully when
38906 - If the default torrc isn't there, just use some default defaults.
38907 Plus provide an internal dirservers file if they don't have one.
38908 - When the user tries to use Tor as an http proxy, give them an http
38909 501 failure explaining that we're a socks proxy.
38910 - Dump a new router.desc on hup, to help confused people who change
38911 their exit policies and then wonder why router.desc doesn't reflect
38913 - Clean up the generic tor.sh init script that we ship with.
38915 - If the exit stream is pending on the resolve, and a destroy arrives,
38916 then the stream wasn't getting removed from the pending list. I
38917 think this was the one causing recent server crashes.
38918 - Use a more robust poll on OSX 10.3, since their poll is flaky.
38919 - When it couldn't resolve any dirservers, it was useless from then on.
38920 Now it reloads the RouterFile (or default dirservers) if it has no
38922 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
38923 many users don't even *have* a /usr/local/sbin/.
38926 Changes in version 0.0.2pre21 - 2004-02-18
38928 - There's a ChangeLog file that actually reflects the changelog.
38929 - There's a 'torify' wrapper script, with an accompanying
38930 tor-tsocks.conf, that simplifies the process of using tsocks for
38931 tor. It even has a man page.
38932 - The tor binary gets installed to sbin rather than bin now.
38933 - Retry streams where the connected cell hasn't arrived in 15 seconds
38934 - Clean up exit policy handling -- get the default out of the torrc,
38935 so we can update it without forcing each server operator to fix
38937 - Allow imaps and pop3s in default exit policy
38939 - Prevent picking middleman nodes as the last node in the circuit
38942 Changes in version 0.0.2pre20 - 2004-01-30
38944 - We now have a deb package, and it's in debian unstable. Go to
38945 it, apt-getters. :)
38946 - I've split the TotalBandwidth option into BandwidthRate (how many
38947 bytes per second you want to allow, long-term) and
38948 BandwidthBurst (how many bytes you will allow at once before the cap
38949 kicks in). This better token bucket approach lets you, say, set
38950 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
38951 performance while not exceeding your monthly bandwidth quota.
38952 - Push out a tls record's worth of data once you've got it, rather
38953 than waiting until you've read everything waiting to be read. This
38954 may improve performance by pipelining better. We'll see.
38955 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
38956 from failed circuits (if they haven't been connected yet) and attach
38958 - Expire old streams that haven't managed to connect. Some day we'll
38959 have them reattach to new circuits instead.
38962 - Fix several memory leaks that were causing servers to become bloated
38964 - Fix a few very rare assert triggers. A few more remain.
38965 - Setuid to User _before_ complaining about running as root.
38968 Changes in version 0.0.2pre19 - 2004-01-07
38970 - Fix deadlock condition in dns farm. We were telling a child to die by
38971 closing the parent's file descriptor to him. But newer children were
38972 inheriting the open file descriptor from the parent, and since they
38973 weren't closing it, the socket never closed, so the child never read
38974 eof, so he never knew to exit. Similarly, dns workers were holding
38975 open other sockets, leading to all sorts of chaos.
38976 - New cleaner daemon() code for forking and backgrounding.
38977 - If you log to a file, it now prints an entry at the top of the
38978 logfile so you know it's working.
38979 - The onionskin challenge length was 30 bytes longer than necessary.
38980 - Started to patch up the spec so it's not quite so out of date.
38983 Changes in version 0.0.2pre18 - 2004-01-02
38985 - Fix endian issues with the 'integrity' field in the relay header.
38986 - Fix a potential bug where connections in state
38987 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
38990 Changes in version 0.0.2pre17 - 2003-12-30
38992 - Made --debuglogfile (or any second log file, actually) work.
38993 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
38994 adversary could force us into an infinite loop.
38997 - Each onionskin handshake now includes a hash of the computed key,
38998 to prove the server's identity and help perfect forward secrecy.
38999 - Changed cell size from 256 to 512 bytes (working toward compatibility
39001 - Changed cell length to 2 bytes, and moved it to the relay header.
39002 - Implemented end-to-end integrity checking for the payloads of
39004 - Separated streamid from 'recognized' (otherwise circuits will get
39005 messed up when we try to have streams exit from the middle). We
39006 use the integrity-checking to confirm that a cell is addressed to
39008 - Randomize the initial circid and streamid values, so an adversary who
39009 breaks into a node can't learn how many circuits or streams have
39013 Changes in version 0.0.2pre16 - 2003-12-14
39015 - Fixed a bug that made HUP trigger an assert
39016 - Fixed a bug where a circuit that immediately failed wasn't being
39017 counted as a failed circuit in counting retries.
39020 - Now we close the circuit when we get a truncated cell: otherwise we're
39021 open to an anonymity attack where a bad node in the path truncates
39022 the circuit and then we open streams at him.
39023 - Add port ranges to exit policies
39024 - Add a conservative default exit policy
39025 - Warn if you're running tor as root
39026 - on HUP, retry OR connections and close/rebind listeners
39027 - options.EntryNodes: try these nodes first when picking the first node
39028 - options.ExitNodes: if your best choices happen to include any of
39029 your preferred exit nodes, you choose among just those preferred
39031 - options.ExcludedNodes: nodes that are never picked in path building
39034 Changes in version 0.0.2pre15 - 2003-12-03
39035 o Robustness and bugfixes:
39036 - Sometimes clients would cache incorrect DNS resolves, which would
39037 really screw things up.
39038 - An OP that goes offline would slowly leak all its sockets and stop
39040 - A wide variety of bugfixes in exit node selection, exit policy
39041 handling, and processing pending streams when a new circuit is
39043 - Pick nodes for a path only from those the directory says are up
39044 - Choose randomly from all running dirservers, not always the first one
39045 - Increase allowed http header size for directory fetch.
39046 - Stop writing to stderr (if we're daemonized it will be closed).
39047 - Enable -g always, so cores will be more useful to me.
39048 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
39051 - Wrote a man page. It lists commonly used options.
39054 - Change default loglevel to warn.
39055 - Make PidFile default to null rather than littering in your CWD.
39056 - OnionRouter config option is now obsolete. Instead it just checks
39058 - Moved to a single unified torrc file for both clients and servers.
39061 Changes in version 0.0.2pre14 - 2003-11-29
39062 o Robustness and bugfixes:
39063 - Force the admin to make the DataDirectory himself
39064 - to get ownership/permissions right
39065 - so clients no longer make a DataDirectory and then never use it
39066 - fix bug where a client who was offline for 45 minutes would never
39067 pull down a directory again
39068 - fix (or at least hide really well) the dns assert bug that was
39069 causing server crashes
39070 - warnings and improved robustness wrt clockskew for certs
39071 - use the native daemon(3) to daemonize, when available
39072 - exit if bind() fails
39073 - exit if neither socksport nor orport is defined
39074 - include our own tor_timegm (Win32 doesn't have its own)
39075 - bugfix for win32 with lots of connections
39076 - fix minor bias in PRNG
39077 - make dirserver more robust to corrupt cached directory
39080 - Wrote the design document (woo)
39082 o Circuit building and exit policies:
39083 - Circuits no longer try to use nodes that the directory has told them
39085 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
39086 bitcounts (18.0.0.0/8).
39087 - Make AP connections standby for a circuit if no suitable circuit
39088 exists, rather than failing
39089 - Circuits choose exit node based on addr/port, exit policies, and
39090 which AP connections are standing by
39091 - Bump min pathlen from 2 to 3
39092 - Relay end cells have a payload to describe why the stream ended.
39093 - If the stream failed because of exit policy, try again with a new
39095 - Clients have a dns cache to remember resolved addresses.
39096 - Notice more quickly when we have no working circuits
39099 - APPort is now called SocksPort
39100 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
39102 - RecommendedVersions is now a config variable rather than
39103 hardcoded (for dirservers)
39104 - Reloads config on HUP
39105 - Usage info on -h or --help
39106 - If you set User and Group config vars, it'll setu/gid to them.
39109 Changes in version 0.0.2pre13 - 2003-10-19
39110 o General stability:
39111 - SSL_write no longer fails when it returns WANTWRITE and the number
39112 of bytes in the buf has changed by the next SSL_write call.
39113 - Fix segfault fetching directory when network is down
39114 - Fix a variety of minor memory leaks
39115 - Dirservers reload the fingerprints file on HUP, so I don't have
39116 to take down the network when I approve a new router
39117 - Default server config file has explicit Address line to specify fqdn
39120 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
39121 - Make listener connections not ever alloc bufs
39123 o Autoconf improvements:
39124 - don't clobber an external CFLAGS in ./configure
39125 - Make install now works
39126 - create var/lib/tor on make install
39127 - autocreate a tor.sh initscript to help distribs
39128 - autocreate the torrc and sample-server-torrc with correct paths
39130 o Log files and Daemonizing now work:
39131 - If --DebugLogFile is specified, log to it at -l debug
39132 - If --LogFile is specified, use it instead of commandline
39133 - If --RunAsDaemon is set, tor forks and backgrounds on startup