XFree86 security update

CentOS Errata and Security Advisory CESA-2005:501

XFree86 is an implementation of the X Window System, which provides
the core functionality for the Linux graphical desktop.

Several integer overflow bugs were found in the way XFree86 parses pixmap
images. It is possible for a user to gain elevated privileges by loading a
specially crafted pixmap image. The Common Vulnerabilities and Exposures
project (cve.mitre.org) has assigned the name CAN-2005-2495 to this issue.

Additionally this update adds the following new features in this release:

• Support for ATI RN50/ES1000 chipsets has been added.

The following bugs were also fixed in this release:

• A problem with the X server’s module loading system that led to cache
  incoherency on the Itanium architecture.

• The X server’s PCI config space accesses caused contention
  with the kernel if accesses occurred while the kernel lock was held.

• X font server (xfs) crashed when accessing Type 1 fonts
  via showfont.

• A problem with the X transport library prevented X applications
  from starting if the hostname started with a digit.

• An issue where refresh rates were being restricted to 60Hz on
  some Intel i8xx systems

Users of XFree86 should upgrade to these updated packages, which contain a
backported patch and are not vulnerable to this issue.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2005-September/074331.html
https://lists.centos.org/pipermail/centos-announce/2005-September/074332.html
https://lists.centos.org/pipermail/centos-announce/2005-September/074333.html
https://lists.centos.org/pipermail/centos-announce/2005-September/074338.html

Affected packages:
XFree86
XFree86-100dpi-fonts
XFree86-75dpi-fonts
XFree86-ISO8859-14-100dpi-fonts
XFree86-ISO8859-14-75dpi-fonts
XFree86-ISO8859-15-100dpi-fonts
XFree86-ISO8859-15-75dpi-fonts
XFree86-ISO8859-2-100dpi-fonts
XFree86-ISO8859-2-75dpi-fonts
XFree86-ISO8859-9-100dpi-fonts
XFree86-ISO8859-9-75dpi-fonts
XFree86-Mesa-libGL
XFree86-Mesa-libGLU
XFree86-Xnest
XFree86-Xvfb
XFree86-base-fonts
XFree86-cyrillic-fonts
XFree86-devel
XFree86-doc
XFree86-font-utils
XFree86-libs
XFree86-libs-data
XFree86-sdk
XFree86-syriac-fonts
XFree86-tools
XFree86-truetype-fonts
XFree86-twm
XFree86-xauth
XFree86-xdm
XFree86-xfs

Upstream details at:
https://access.redhat.com/errata/RHSA-2005:501