Ubuntu Security Notice USN-1142-1

1st June, 2011

gdm vulnerability

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

• Ubuntu 11.04

Summary

GDM could be made to launch a browser and leak information about the system.

Software description

• gdm
  - GNOME Display Manager
  
  

Details

Henne Vogelsang discovered that under certain PolicyKit configurations, GDM
could be made to launch a browser. A local attacker could exploit this to
gain access to files with the privileges of the gdm user. PolicyKit is not
configured in this manner in Ubuntu by default.

Update instructions

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

Ubuntu 11.04:

gdm

2.32.1-0ubuntu3.2

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

CVE-2011-1709