(RHSA-2007:0126) Important: xorg-x11 security update

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.