xorg-server - privilege escalation

Aaron Plattner discovered a buffer overflow in the Composite extension
of the X.org X server, which can lead to local privilege escalation.

The oldstable distribution (sarge) is not affected by this problem.

For the stable distribution (etch) this problem has been fixed in
version 1.1.1-21etch1.

For the unstable distribution (sid) this problem will be fixed soon.

We recommend that you upgrade your xorg-server packages.