CVE-2011-4029 - Sludgy Engineer

Description

The LockServer function in os/utils.c in X.Org xserver before 1.11.2 allows local users to change the permissions of arbitrary files to 444 read those files and possibly cause a denial of service (removed execution permission) via a symlink attack on a temporary lock file.

Reference

http://cgit.freedesktop.org/xorg/xserver/commit/?id=b67581cf825940fdf52bf2e0af4330e695d724a4 http://lists.freedesktop.org/archives/xorg/2011-October/053680.html http://secunia.com/advisories/46460 http://rhn.redhat.com/errata/RHSA-2012-0939.html http://secunia.com/advisories/49579