USN-1399-2: Light Display Manager vulnerability

13 March 2012

lightdm vulnerability

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

  • Ubuntu 11.10

Summary

Light Display Manager could be made to delete files as the administrator.

Software Description

  • lightdm - Display Manager

Details

Ryan Lortie discovered that a guest session script bundled in the Light Display Manager package improperly cleaned out certain guest session files. A local attacker could use this issue to delete arbitrary files.

Update instructions

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

Ubuntu 11.10
lightdm - 1.0.6-0ubuntu1.6

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.

References