RHSA-2008:0502 - Security Advisory

Topic

Updated XFree86 packages that fix several security issues are now available
for Red Hat Enterprise Linux 3.

This update has been rated as having important security impact by the Red
Hat Security Response Team.

Description

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

An input validation flaw was discovered in X.org's Security and Record
extensions. 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-2008-1377)

Multiple integer overflow flaws were found in X.org's Render extension. A
malicious authorized client could exploit these issues to cause a denial of
service (crash) or, potentially, execute arbitrary code with root
privileges on the X.Org server. (CVE-2008-2360, CVE-2008-2361)

An input validation flaw was discovered in X.org's MIT-SHM extension. A
client connected to the X.org server could read arbitrary server memory.
This could result in the sensitive data of other users of the X.org server
being disclosed. (CVE-2008-1379)

Users of XFree86 are advised to upgrade to these updated packages, which
contain backported patches to resolve these issues.

Solution

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

Affected Products

• Red Hat Enterprise Linux Server 3 x86_64
• Red Hat Enterprise Linux Server 3 ia64
• Red Hat Enterprise Linux Server 3 i386
• Red Hat Enterprise Linux Workstation 3 x86_64
• Red Hat Enterprise Linux Workstation 3 ia64
• Red Hat Enterprise Linux Workstation 3 i386
• Red Hat Enterprise Linux Desktop 3 x86_64
• Red Hat Enterprise Linux Desktop 3 i386
• Red Hat Enterprise Linux for IBM z Systems 3 s390x
• Red Hat Enterprise Linux for IBM z Systems 3 s390
• Red Hat Enterprise Linux for Power, big endian 3 ppc

Fixes

• BZ - 445403 - CVE-2008-1377 X.org Record and Security extensions memory corruption
• BZ - 445414 - CVE-2008-1379 X.org MIT-SHM extension arbitrary memory read
• BZ - 448783 - CVE-2008-2360 X.org Render extension AllocateGlyph() heap buffer overflow
• BZ - 448784 - CVE-2008-2361 X.org Render extension ProcRenderCreateCursor() crash

CVEs

• CVE-2008-1379
• CVE-2008-2361
• CVE-2008-2360
• CVE-2008-1377

References

• http://www.redhat.com/security/updates/classification/#important