xorg security update

CentOS Errata and Security Advisory CESA-2014:1983

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 integer overflow flaws and out-of-bounds write flaws were found in
the way the X.Org server calculated memory requirements for certain X11
core protocol and GLX extension requests. A malicious, authenticated client
could use either of these flaws to crash the X.Org server or, potentially,
execute arbitrary code with root privileges. (CVE-2014-8092, CVE-2014-8093,
CVE-2014-8098)

It was found that the X.Org server did not properly handle SUN-DES-1
(Secure RPC) authentication credentials. A malicious, unauthenticated
client could use this flaw to crash the X.Org server by submitting a
specially crafted authentication request. (CVE-2014-8091)

Multiple out-of-bounds access flaws were found in the way the X.Org server
calculated memory requirements for certain requests. A malicious,
authenticated client could use either of these flaws to crash the X.Org
server, or leak memory contents to the client. (CVE-2014-8097)

An integer overflow flaw was found in the way the X.Org server calculated
memory requirements for certain DRI2 extension requests. A malicious,
authenticated client could use this flaw to crash the X.Org server.
(CVE-2014-8094)

Multiple out-of-bounds access flaws were found in the way the X.Org server
calculated memory requirements for certain requests. A malicious,
authenticated client could use either of these flaws to crash the X.Org
server. (CVE-2014-8095, CVE-2014-8096, CVE-2014-8099, CVE-2014-8100,
CVE-2014-8101, CVE-2014-8102, CVE-2014-8103)

All xorg-x11-server users are advised to upgrade to these updated packages,
which contain backported patches to correct these issues.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2014-December/082985.html
https://lists.centos.org/pipermail/centos-announce/2014-December/082986.html

Affected packages:
xorg-x11-server-Xdmx
xorg-x11-server-Xephyr
xorg-x11-server-Xnest
xorg-x11-server-Xorg
xorg-x11-server-Xvfb
xorg-x11-server-common
xorg-x11-server-devel
xorg-x11-server-source

Upstream details at:
https://access.redhat.com/errata/RHSA-2014:1983