Debian: DSA-2686-1 Critical: Libxcb Buffer Overflow DoS Risk

Ilja van Sprundel of IOActive discovered several security issues in
multiple components of the X.org graphics stack and the related
libraries: Various integer overflows, sign handling errors in integer
conversions, buffer overflows, memory corruption and missing input
sanitising may lead to privilege escalation or denial of service.

For the oldstable distribution (squeeze), this problem has been fixed in
version 1.6-1+squeeze1.

For the stable distribution (wheezy), this problem has been fixed in
version 1.8.1-2+deb7u1.

For the unstable distribution (sid), this problem has been fixed in
version 1.8.1-2+deb7u1.

We recommend that you upgrade your libxcb packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/