Debian DSA-2205-1 Critical: gdm3 Privilege Escalation Risk

Sebastian Krahmer discovered that the gdm3, the GNOME Desktop Manager,
does not properly drop privileges when manipulating files related to
the logged-in user. As a result, local users can gain root
privileges.

The oldstable distribution (lenny) does not contain a gdm3 package.
The gdm package is not affected by this issue.

For the stable distribution (squeeze), this problem has been fixed in
version 2.30.5-6squeeze2.

For the testing distribution (wheezy) and the unstable distribution
(sid), this problem will be fixed soon.

We recommend that you upgrade your gdm3 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/