Bryan Quigley discovered an integer underflow in the Xorg X server which
could lead to denial of service or the execution of arbitrary code.
For the oldstable distribution (squeeze), this problem has been fixed in
version 1.7.7-18.
For the stable distribution (wheezy), this problem has been fixed in
version 1.12.4-6+deb7u2.
For the unstable distribution (sid), this problem will be fixed soon.
We recommend that you upgrade your xorg-server 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/
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