USN-688-1: Compiz vulnerability

Ubuntu Security Notice USN-688-1

8th 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 version:

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.