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Pick a date, update ReleaseNotes. (0.2.7)

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ChangeLog
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Changes in version 0.2.7.7 - 2017-03-??
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

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ReleaseNotes
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@ -2,6 +2,95 @@ 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 0.2.7.7 - 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.