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

Ubuntu Security Notice USN-1502-1

11th July, 2012

xorg-server vulnerability

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

  • Ubuntu 12.04 LTS

Summary

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

Details

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 version:

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

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2012-2118