Updated X.org packages that fix a security issue are now available for Red
Hat Enterprise Linux 4.
This update has been rated as having important security impact by the Red
Hat Security Response Team.
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 two integer overflow flaws in the way the X.org server
processed CID font files. A malicious authorized client could exploit this
issue to cause a denial of service (crash) or potentially execute arbitrary
code with root privileges on the X.org server. (CVE-2006-3739, CVE-2006-3740)
Users of X.org should upgrade to these updated packages, which contain a
backported patch and is not vulnerable to this issue.