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.

The Xorg X server is an X server for several architectures and operating systems, which is derived from the XFree86 4.x series of X servers.

xorg-server on Debian Linux

This check tests the installed software version using the apt package manager.

• http://www.debian.org/security/2013/dsa-2822.html

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Updated on 2015-03-25