Ubuntu Security Notice USN-1950-1
12th September, 2013
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 13.04
Light Display Manager could be made to expose sensitive information.
- lightdm - Display Manager
It was discovered that Light Display Manager created .Xauthority files with
incorrect permissions. A local attacker could use this flaw to bypass
The problem can be corrected by updating your system to the following package version:
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.