USN-1714-1: QXL graphics driver vulnerability

Ubuntu Security Notice USN-1714-1

5th February, 2013

xserver-xorg-video-qxl vulnerability

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

  • Ubuntu 12.04 LTS
  • Ubuntu 11.10


Guests using the QXL graphics driver could be caused to hang or crash.

Software description

  • xserver-xorg-video-qxl - X.Org X server -- QXL display driver


It was discovered that the QXL graphics driver incorrectly handled
terminated connections. An attacker that could connect to a guest using
SPICE and the QXL graphics driver could cause the guest to hang or crash,
resulting in 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-video-qxl 0.0.16-2ubuntu0.1
Ubuntu 11.10:
xserver-xorg-video-qxl 0.0.14-1ubuntu0.1

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.