Ubuntu Security Notice USN-1349-1
26th January, 2012
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
X could be made to start by a user who lacked appropriate permissions.
- xorg - X.Org X Window System
It was discovered that the X wrapper incorrectly checked certain console
permissions when launched by unprivileged users. An attacker connected
remotely could use this flaw to start X, bypassing the console permissions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 11.10:
- xserver-xorg 1:7.6+7ubuntu7.1
- Ubuntu 11.04:
- xserver-xorg 1:7.6+4ubuntu3.2
- Ubuntu 10.10:
- xserver-xorg 1:7.5+6ubuntu3.1
- Ubuntu 10.04 LTS:
- xserver-xorg 1:7.5+5ubuntu1.1
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.