Synopsis: Moderate: gdm security update
Issue Date: 2011-03-28
CVE Numbers: CVE-2011-0727
The GNOME Display Manager (GDM) provides the graphical login screen, shown
shortly after boot up, log out, and when user-switching.
A race condition flaw was found in the way GDM handled the cache
directories used to store users’ dmrc and face icon files. A local attacker
could use this flaw to trick GDM into changing the ownership of an
arbitrary file via a symbolic link attack, allowing them to escalate their
Red Hat would like to thank Sebastian Krahmer of the SuSE Security Team for
reporting this issue.
All users should upgrade to these updated packages, which contain a
backported patch to correct this issue. GDM must be restarted for this
update to take effect. Rebooting achieves this, but changing the runlevel
from 5 to 3 and back to 5 also restarts GDM.
– Scientific Linux Development Team