tor - security update

It has been discovered that Tor treats the contents of some buffer
chunks as if they were a NUL-terminated string. This issue could
enable a remote attacker to crash a Tor client, hidden service, relay,
or authority. This update aims to defend against this general
class of security bugs.

For Debian 7 Wheezy, this problem has been fixed in version 0.2.4.27-2.

For the stable distribution (jessie), this problem has been fixed in
version 0.2.5.12-3., for unstable (sid) with version 0.2.8.9-1, and for
experimental with 0.2.9.4-alpha-1.

Additionally, for wheezy this updates the set of authority directory servers
to the one from Tor 0.2.8.7, released in August 2016.

We recommend that you upgrade your tor packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: <https://wiki.debian.org/LTS&gt;