USN-1399-1: gdm-guest-session vulnerability

13 March 2012

gdm-guest-session vulnerability

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

  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS

Summary

gdm-guest-session could be made to delete files as the administrator.

Software Description

  • gdm-guest-session - gdm extension for guest session

Details

Ryan Lortie discovered that gdm-guest-session 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 11.04
gdm-guest-session - 0.24ubuntu0.1
Ubuntu 10.10
gdm-guest-session - 0.17ubuntu0.1
Ubuntu 10.04 LTS
gdm-guest-session - 0.15ubuntu0.1

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.

References