Tor 0.2.2.20-alpha is out (security patches)

Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
exploitable bugs. Thanks to Willem Pinckaers for notifying us of the
issue. The Common Vulnerabilities and Exposures project has assigned
CVE-2010-1676 to this issue.

We also fix a variety of other significant bugs, change the IP address
for one of our directory authorities, and update the minimum version
that Tor relays must run to join the network.

All Tor users should upgrade.

https://www.torproject.org/download/download

Changes in version 0.2.2.20-alpha - 2010-12-17
Major bugfixes:

  • Fix a remotely exploitable bug that could be used to crash instances
    of Tor remotely by overflowing on the heap. Remote-code execution
    hasn't been confirmed, but can't be ruled out. Everyone should
    upgrade. Bugfix on the 0.1.1 series and later.
  • Fix a bug that could break accounting on 64-bit systems with large
    time_t values, making them hibernate for impossibly long intervals.
    Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
  • Fix a logic error in directory_fetches_from_authorities() that
    would cause all _non_-exits refusing single-hop-like circuits
    to fetch from authorities, when we wanted to have _exits_ fetch
    from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
    fix by boboper.
  • Fix a stream fairness bug that would cause newer streams on a given
    circuit to get preference when reading bytes from the origin or
    destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
    introduced before the first Tor release, in svn revision r152.

Directory authority changes:

  • Change IP address and ports for gabelmoo (v3 directory authority).

Minor bugfixes:

  • Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
    Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
  • Fix an off-by-one error in calculating some controller command
    argument lengths. Fortunately, this mistake is harmless since
    the controller code does redundant NUL termination too. Found by
    boboper. Bugfix on 0.1.1.1-alpha.
  • Do not dereference NULL if a bridge fails to build its
    extra-info descriptor. Found by an anonymous commenter on
    Trac. Bugfix on 0.2.2.19-alpha.

Minor features:

  • Update to the December 1 2010 Maxmind GeoLite Country database.
  • Directory authorities now reject relays running any versions of
    Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
    known bugs that keep RELAY_EARLY cells from working on rendezvous
    circuits. Followup to fix for bug 2081.
  • Directory authorities now reject relays running any version of Tor
    older than 0.2.0.26-rc. That version is the earliest that fetches
    current directory information correctly. Fixes bug 2156.
  • Report only the top 10 ports in exit-port stats in order not to
    exceed the maximum extra-info descriptor length of 50 KB. Implements
    task 2196.
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