USN-1502-1: X.Org X Server vulnerability

11 July 2012

xorg-server vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 12.04 LTS


The X.Org X server could be made to crash if a specially crafted input device was added.

Software Description

  • xorg-server - X.Org X server


Ken Mixter discovered a format string vulnerability in the LogVHdrMessageVerb function when handling input device names. This could allow a local attacker to cause a denial of service or possibly execute arbitrary code.

The default compiler options for the affected release should reduce the vulnerability to a denial of service.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.04 LTS
xserver-xorg-core - 2:1.11.4-0ubuntu10.5

To update your system, please follow these instructions:

After a standard system update you need to reboot your computer to make all the necessary changes.