xorg security update

CentOS Errata and Security Advisory CESA-2011:1360

X.Org is an open source implementation of the X Window System. It provides
the basic low-level functionality that full-fledged graphical user
interfaces are designed upon.

Multiple input sanitization flaws were found in the X.Org GLX (OpenGL
extension to the X Window System) extension. A malicious, authorized client
could use these flaws to crash the X.Org server or, potentially, execute
arbitrary code with root privileges. (CVE-2010-4818)

An input sanitization flaw was found in the X.Org Render extension. A
malicious, authorized client could use this flaw to leak arbitrary memory
from the X.Org server process, or possibly crash the X.Org server.
(CVE-2010-4819)

Users of xorg-x11 should upgrade to these updated packages, which contain a
backported patch to resolve these issues. All running X.Org server
instances must be restarted for this update to take effect.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2011-November/080323.html
https://lists.centos.org/pipermail/centos-announce/2011-November/080324.html

Affected packages:
xorg-x11
xorg-x11-Mesa-libGL
xorg-x11-Mesa-libGLU
xorg-x11-Xdmx
xorg-x11-Xnest
xorg-x11-Xvfb
xorg-x11-deprecated-libs
xorg-x11-deprecated-libs-devel
xorg-x11-devel
xorg-x11-doc
xorg-x11-font-utils
xorg-x11-libs
xorg-x11-sdk
xorg-x11-tools
xorg-x11-twm
xorg-x11-xauth
xorg-x11-xdm
xorg-x11-xfs

Upstream details at:
https://access.redhat.com/errata/RHSA-2011:1360