USN-688-1: Compiz vulnerability

9 December 2008

compiz-fusion-plugins-main vulnerability

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

  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 7.10

Software Description

  • compiz-fusion-plugins-main


It was discovered that the Expo plugin for Compiz did not correctly restrict the screensaver window from being moved with the mouse. A local attacker could use the mouse to move the screensaver off the screen and gain access to the locked desktop session underneath. Default installs of Ubuntu were not vulnerable as Expo does not come pre-configured with mouse bindings.

Update instructions

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

Ubuntu 8.10
compiz-fusion-plugins-main - 0.7.8-0ubuntu2.2
Ubuntu 8.04 LTS
compiz-fusion-plugins-main - 0.7.4-0ubuntu6.2
Ubuntu 7.10
compiz-fusion-plugins-main - 0.5.2+git20070928-0ubuntu2.2

To update your system, please follow these instructions:

After a standard system upgrade you need to restart your session to effect the necessary changes.