=========================================================================Ubuntu Security Notice USN-1117-1
April 19, 2011
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 9.10
Local users could gain root access by using the pkexec tool in PolicyKit.
- policykit-1: framework for managing administrative policies and privileges
Neel Mehta discovered that PolicyKit did not correctly verify the user
making authorization requests. A local attacker could exploit this to
trick pkexec into running applications with root privileges.
The problem can be corrected by updating your system to the following