Light Display Manager could be made to delete files as the administrator.
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.
13 March 2012
A security issue affects these releases of Ubuntu and its derivatives:
Light Display Manager could be made to delete files as the administrator.
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.
The problem can be corrected by updating your system to the following package versions:
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.
Vulmon