Ubuntu Security Notice USN-1714-1
5th February, 2013
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.
- 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.
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: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.