Merge branch 'maint-0.2.7-redux' into release-0.2.7-redux

To build this changelog, I've gone through the entries in
release-0.2.4's changes subdirectory, and looked up the ChangeLog
entry for each.  I have not sorted them yet.

ChangeLog

@@ -1,3 +1,114 @@
+Changes in version 0.2.7.8 - 2017-06-08
+  Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
+  remotely crash a hidden service with an assertion failure. Anyone
+  running a hidden service should upgrade to this version, or to some
+  other version with fixes for TROVE-2017-005.  (Versions before 0.3.0
+  are not affected by TROVE-2017-004.)
+
+  o Major bugfixes (hidden service, relay, security):
+    - Fix a remotely triggerable assertion failure caused by receiving a
+      BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
+      22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
+      on 0.2.2.1-alpha.
+
+  o Minor features (geoip):
+    - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
+      Country database.
+
+  o Minor bugfixes (correctness):
+    - Avoid undefined behavior when parsing IPv6 entries from the geoip6
+      file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
+
+
+Changes in version 0.2.7.7 - 2017-03-03
+  Tor 0.2.7.7 backports a number of security fixes from later Tor
+  releases.  Anybody running Tor 0.2.7.6 or earlier should upgrade to
+  this release, if for some reason they cannot upgrade to a later
+  release series.
+
+  Note that support for Tor 0.2.7.x is ending this year: we will not issue
+  any fixes for the Tor 0.2.7.x series after 1 August 2017.  If you need
+  a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
+
+  o Directory authority changes (backport from 0.2.8.5-rc):
+    - Urras is no longer a directory authority. Closes ticket 19271.
+
+  o Directory authority changes (backport from 0.2.9.2-alpha):
+    - The "Tonga" bridge authority has been retired; the new bridge
+      authority is "Bifroest". Closes tickets 19728 and 19690.
+
+  o Directory authority key updates (backport from 0.2.8.1-alpha):
+    - Update the V3 identity key for the dannenberg directory authority:
+      it was changed on 18 November 2015. Closes task 17906. Patch
+      by "teor".
+
+  o Major bugfixes (parsing, security, backport from 0.2.9.8):
+    - Fix a bug in parsing that could cause clients to read a single
+      byte past the end of an allocated region. This bug could be used
+      to cause hardened clients (built with --enable-expensive-hardening)
+      to crash if they tried to visit a hostile hidden service. Non-
+      hardened clients are only affected depending on the details of
+      their platform's memory allocator. Fixes bug 21018; bugfix on
+      0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
+      2016-12-002 and as CVE-2016-1254.
+
+  o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
+    - Stop a crash that could occur when a client running with DNSPort
+      received a query with multiple address types, and the first
+      address type was not supported. Found and fixed by Scott Dial.
+      Fixes bug 18710; bugfix on 0.2.5.4-alpha.
+    - Prevent a class of security bugs caused by treating the contents
+      of a buffer chunk as if they were a NUL-terminated string. At
+      least one such bug seems to be present in all currently used
+      versions of Tor, and would allow an attacker to remotely crash
+      most Tor instances, especially those compiled with extra compiler
+      hardening. With this defense in place, such bugs can't crash Tor,
+      though we should still fix them as they occur. Closes ticket
+      20384 (TROVE-2016-10-001).
+
+  o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
+    - Avoid a difficult-to-trigger heap corruption attack when extending
+      a smartlist to contain over 16GB of pointers. Fixes bug 18162;
+      bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
+      Reported by Guido Vranken.
+
+  o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
+    - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
+      bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
+
+  o Major bugfixes (key management, backport from 0.2.8.3-alpha):
+    - If OpenSSL fails to generate an RSA key, do not retain a dangling
+      pointer to the previous (uninitialized) key value. The impact here
+      should be limited to a difficult-to-trigger crash, if OpenSSL is
+      running an engine that makes key generation failures possible, or
+      if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
+      0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
+      Baishakhi Ray.
+
+  o Major bugfixes (parsing, backported from 0.3.0.4-rc):
+    - Fix an integer underflow bug when comparing malformed Tor
+      versions. This bug could crash Tor when built with
+      --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
+      0.2.9.8, which were built with -ftrapv by default. In other cases
+      it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
+      on 0.0.8pre1. Found by OSS-Fuzz.
+
+  o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
+    - Make memwipe() do nothing when passed a NULL pointer or buffer of
+      zero size. Check size argument to memwipe() for underflow. Fixes
+      bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
+      patch by "teor".
+
+  o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
+    - Make Tor survive errors involving connections without a
+      corresponding event object. Previously we'd fail with an
+      assertion; now we produce a log message. Related to bug 16248.
+
+  o Minor features (geoip):
+    - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
+      Country database.
+
+
 Changes in version 0.2.7.6 - 2015-12-10
   Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
   well as a minor bug in hidden service reliability.

ReleaseNotes

@@ -2,6 +2,117 @@ This document summarizes new features and bugfixes in each stable release
 of Tor. If you want to see more detailed descriptions of the changes in
 each development snapshot, see the ChangeLog file.
 
+Changes in version 0.2.7.8 - 2017-06-08
+  Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
+  remotely crash a hidden service with an assertion failure. Anyone
+  running a hidden service should upgrade to this version, or to some
+  other version with fixes for TROVE-2017-005.  (Versions before 0.3.0
+  are not affected by TROVE-2017-004.)
+
+  o Major bugfixes (hidden service, relay, security):
+    - Fix a remotely triggerable assertion failure caused by receiving a
+      BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
+      22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
+      on 0.2.2.1-alpha.
+
+  o Minor features (geoip):
+    - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
+      Country database.
+
+  o Minor bugfixes (correctness):
+    - Avoid undefined behavior when parsing IPv6 entries from the geoip6
+      file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
+
+
+Changes in version 0.2.7.7 - 2017-03-03
+  Tor 0.2.7.7 backports a number of security fixes from later Tor
+  releases.  Anybody running Tor 0.2.7.6 or earlier should upgrade to
+  this release, if for some reason they cannot upgrade to a later
+  release series.
+
+  Note that support for Tor 0.2.7.x is ending this year: we will not issue
+  any fixes for the Tor 0.2.7.x series after 1 August 2017.  If you need
+  a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
+
+  o Directory authority changes (backport from 0.2.8.5-rc):
+    - Urras is no longer a directory authority. Closes ticket 19271.
+
+  o Directory authority changes (backport from 0.2.9.2-alpha):
+    - The "Tonga" bridge authority has been retired; the new bridge
+      authority is "Bifroest". Closes tickets 19728 and 19690.
+
+  o Directory authority key updates (backport from 0.2.8.1-alpha):
+    - Update the V3 identity key for the dannenberg directory authority:
+      it was changed on 18 November 2015. Closes task 17906. Patch
+      by "teor".
+
+  o Major bugfixes (parsing, security, backport from 0.2.9.8):
+    - Fix a bug in parsing that could cause clients to read a single
+      byte past the end of an allocated region. This bug could be used
+      to cause hardened clients (built with --enable-expensive-hardening)
+      to crash if they tried to visit a hostile hidden service. Non-
+      hardened clients are only affected depending on the details of
+      their platform's memory allocator. Fixes bug 21018; bugfix on
+      0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
+      2016-12-002 and as CVE-2016-1254.
+
+  o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
+    - Stop a crash that could occur when a client running with DNSPort
+      received a query with multiple address types, and the first
+      address type was not supported. Found and fixed by Scott Dial.
+      Fixes bug 18710; bugfix on 0.2.5.4-alpha.
+    - Prevent a class of security bugs caused by treating the contents
+      of a buffer chunk as if they were a NUL-terminated string. At
+      least one such bug seems to be present in all currently used
+      versions of Tor, and would allow an attacker to remotely crash
+      most Tor instances, especially those compiled with extra compiler
+      hardening. With this defense in place, such bugs can't crash Tor,
+      though we should still fix them as they occur. Closes ticket
+      20384 (TROVE-2016-10-001).
+
+  o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
+    - Avoid a difficult-to-trigger heap corruption attack when extending
+      a smartlist to contain over 16GB of pointers. Fixes bug 18162;
+      bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
+      Reported by Guido Vranken.
+
+  o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
+    - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
+      bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
+
+  o Major bugfixes (key management, backport from 0.2.8.3-alpha):
+    - If OpenSSL fails to generate an RSA key, do not retain a dangling
+      pointer to the previous (uninitialized) key value. The impact here
+      should be limited to a difficult-to-trigger crash, if OpenSSL is
+      running an engine that makes key generation failures possible, or
+      if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
+      0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
+      Baishakhi Ray.
+
+  o Major bugfixes (parsing, backported from 0.3.0.4-rc):
+    - Fix an integer underflow bug when comparing malformed Tor
+      versions. This bug could crash Tor when built with
+      --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
+      0.2.9.8, which were built with -ftrapv by default. In other cases
+      it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
+      on 0.0.8pre1. Found by OSS-Fuzz.
+
+  o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
+    - Make memwipe() do nothing when passed a NULL pointer or buffer of
+      zero size. Check size argument to memwipe() for underflow. Fixes
+      bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
+      patch by "teor".
+
+  o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
+    - Make Tor survive errors involving connections without a
+      corresponding event object. Previously we'd fail with an
+      assertion; now we produce a log message. Related to bug 16248.
+
+  o Minor features (geoip):
+    - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
+      Country database.
+
+
 Changes in version 0.2.7.6 - 2015-12-10
   Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
   well as a minor bug in hidden service reliability.

changes/19271

@@ -1,2 +0,0 @@
-  o Directory authority changes:
-    - Urras is no longer a directory authority. Closes ticket 19271.

changes/bifroest

@@ -1,3 +0,0 @@
-  o Directory authority changes (also in 0.2.8.7):
-    - The "Tonga" bridge authority has been retired; the new bridge
-      authority is "Bifroest". Closes tickets 19728 and 19690.

changes/buf-sentinel

@@ -1,11 +0,0 @@
-  o Major features (security fixes):
-
-    - Prevent a class of security bugs caused by treating the contents
-      of a buffer chunk as if they were a NUL-terminated string.  At
-      least one such bug seems to be present in all currently used
-      versions of Tor, and would allow an attacker to remotely crash
-      most Tor instances, especially those compiled with extra compiler
-      hardening. With this defense in place, such bugs can't crash Tor,
-      though we should still fix them as they occur. Closes ticket 20384
-      (TROVE-2016-10-001).
-

changes/bug16248

@@ -1,8 +0,0 @@
-  o Major bugfixes (dns proxy mode, crash):
-    - Avoid crashing when running as a DNS proxy. Closes bug 16248; bugfix on
-      0.2.0.1-alpha. Patch from 'cypherpunks'.
-
-  o Minor features (bug-resistance):
-    - Make Tor survive errors involving connections without a corresponding
-      event object. Previously we'd fail with an assertion; now we produce a
-      log message. Related to bug 16248.

changes/bug17354

@@ -1,4 +0,0 @@
-  o Minor bugfixes (sandbox):
-    - Add the "hidserv-stats" filename to our sandbox filter for the
-      HiddenServiceStatistics option to work properly. Fixes bug 17354;
-      bugfix on tor-0.2.6.2-alpha~54^2~1. Patch from David Goulet.

changes/bug17906

@@ -1,4 +0,0 @@
-  o Minor features (authorities):
-    - Update the V3 identity key for dannenberg, it was changed on
-      18 November 2015.
-      Closes task #17906. Patch by "teor".

changes/bug18089

@@ -1,6 +0,0 @@
-  o Minor fixes (security):
-    - Make memwipe() do nothing when passed a NULL pointer
-      or zero size. Check size argument to memwipe() for underflow.
-      Closes bug #18089. Reported by "gk", patch by "teor".
-      Bugfix on 0.2.3.25 and 0.2.4.6-alpha (#7352),
-      commit 49dd5ef3 on 7 Nov 2012.

changes/bug18162

@@ -1,7 +0,0 @@
-  o Major bugfixes (security, pointers):
-
-    - Avoid a difficult-to-trigger heap corruption attack when extending
-      a smartlist to contain over 16GB of pointers. Fixes bug #18162;
-      bugfix on Tor 0.1.1.11-alpha, which fixed a related bug
-      incompletely. Reported by Guido Vranken.
-

changes/bug18710

@@ -1,6 +0,0 @@
-  o Major bugfixes (DNS proxy):
-    - Stop a crash that could occur when a client running with DNSPort
-      received a query with multiple address types, where the first
-      address type was not supported. Found and fixed by Scott Dial.
-      Fixes bug 18710; bugfix on 0.2.5.4-alpha.
-

changes/bug20384

@@ -1,10 +0,0 @@
-  o Major features (security fixes):
-    - Prevent a class of security bugs caused by treating the contents
-      of a buffer chunk as if they were a NUL-terminated string. At
-      least one such bug seems to be present in all currently used
-      versions of Tor, and would allow an attacker to remotely crash
-      most Tor instances, especially those compiled with extra compiler
-      hardening. With this defense in place, such bugs can't crash Tor,
-      though we should still fix them as they occur. Closes ticket
-      20384 (TROVE-2016-10-001).
-

changes/bug21018

@@ -1,11 +0,0 @@
-  o Major bugfixes (parsing, security):
-
-    - Fix a bug in parsing that could cause clients to read a single
-      byte past the end of an allocated region. This bug could be
-      used to cause hardened clients (built with
-      --enable-expensive-hardening) to crash if they tried to visit
-      a hostile hidden service.  Non-hardened clients are only
-      affected depending on the details of their platform's memory
-      allocator. Fixes bug 21018; bugfix on 0.2.0.8-alpha. Found by
-      using libFuzzer. Also tracked as TROVE-2016-12-002 and as
-      CVE-2016-1254.

changes/bug22490

@@ -1,3 +0,0 @@
-  o Minor bugfixes (correctness):
-    - Avoid undefined behavior when parsing IPv6 entries from the geoip6
-      file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.

changes/geoip-april2016

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the April 5 2016 Maxmind GeoLite2
-      Country database.
-

changes/geoip-april2017

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
-      Country database.
-

changes/geoip-august2016

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
-      Country database.
-

changes/geoip-december2016

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
-      Country database.
-

changes/geoip-february2016

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the February 2 2016 Maxmind GeoLite2
-      Country database.
-

changes/geoip-february2017

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
-      Country database.
-

changes/geoip-january2016

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
-      Country database.
-

changes/geoip-january2017

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
-      Country database.
-

changes/geoip-july2016

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
-      Country database.
-

changes/geoip-jun2016

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
-      Country database.
-

changes/geoip-march2016

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
-      Country database.
-

changes/geoip-march2017

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
-      Country database.
-

changes/geoip-may2016

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
-      Country database.
-

changes/geoip-may2017

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
-      Country database.
-

changes/geoip-november2016

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
-      Country database.
-

changes/geoip-october2016

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
-      Country database.
-

changes/geoip-september2016

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
-      Country database.
-

changes/rsa_init_bug

@@ -1,7 +0,0 @@
-  o Major bugfixes (key management):
-    - If OpenSSL fails to generate an RSA key, do not retain a dangling pointer
-      to the previous (uninitialized) key value. The impact here should be
-      limited to a difficult-to-trigger crash, if OpenSSL is running an
-      engine that makes key generation failures possible, or if OpenSSL runs
-      out of memory. Fixes bug 19152; bugfix on 0.2.1.10-alpha. Found by
-      Yuan Jochen Kang, Suman Jana, and Baishakhi Ray.

changes/trove-2017-001.2

@@ -1,8 +0,0 @@
-  o Major bugfixes (parsing):
-    - Fix an integer underflow bug when comparing malformed Tor versions.
-      This bug is harmless, except when Tor has been built with
-      --enable-expensive-hardening, which would turn it into a crash;
-      or on Tor 0.2.9.1-alpha through Tor 0.2.9.8, which were built with
-      -ftrapv by default.
-      Part of TROVE-2017-001. Fixes bug 21278; bugfix on
-      0.0.8pre1. Found by OSS-Fuzz.

changes/trove-2017-005

@@ -1,7 +0,0 @@
-  o Major bugfixes (hidden service, relay, security):
-    - Fix an assertion failure caused by receiving a BEGIN_DIR cell on
-      a hidden service rendezvous circuit. Fixes bug 22494, tracked as
-      TROVE-2017-005 and CVE-2017-0376; bugfix on 0.2.2.1-alpha. Found
-      by armadev.
-
-