xorg security update

CentOS Errata and Security Advisory CESA-2007:0126

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.

iDefense reported an integer overflow flaw in the X.org XC-MISC
extension. A malicious authorized client could exploit this issue to cause
a denial of service (crash) or potentially execute arbitrary code with the
privileges of the X.org server. (CVE-2007-1003)

iDefense reported two integer overflows in the way X.org handled various
font files. A malicious local user could exploit these issues to
potentially execute arbitrary code with the privileges of the X.org server.
(CVE-2007-1351, CVE-2007-1352)

An integer overflow flaw was found in the X.org XGetPixel() function.
Improper use of this function could cause an application calling it to
function improperly, possibly leading to a crash or arbitrary code
execution. (CVE-2007-1667)

Users of X.org should upgrade to these updated packages, which contain a
backported patch and are not vulnerable to these issues.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2007-April/075809.html
https://lists.centos.org/pipermail/centos-announce/2007-April/075813.html
https://lists.centos.org/pipermail/centos-announce/2007-April/075820.html
https://lists.centos.org/pipermail/centos-announce/2007-April/075821.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-2007:0126