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Category:   Application (Generic)  >   XFree Vendors:   XFree86 Project
(Red Hat Issues Fix for XFree86) X Integer Overflow in AllocateGlyph() Lets Local Users and Remote Authenticated Users Execute Arbitrary Code
SecurityTracker Alert ID:  1020268
SecurityTracker URL:  http://securitytracker.com/id/1020268
CVE Reference:   CVE-2008-2360   (Links to External Site)
Date:  Jun 12 2008
Impact:   Execution of arbitrary code via network, Root access via local system, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in the X Window System. A remote authenticated user can execute arbitrary code on the target system. A local user can obtain elevated privileges on the target system. XFree86 is affected.

A remote authenticated user can send specially crafted data to trigger an integer overflow in the AllocateGlyph() function and execute arbitrary code on the target X server. The code will run with the privileges of the target server (which may be root privileges on many systems).

A local user can execute arbitrary commands on the target system with elevated privileges.

The RENDER Extension is affected.

The vendor was notified on March 26, 2008.

regenrecht reported this vulnerability via iDefense.

Impact:   A remote authenticated user can execute arbitrary code on the target system.

A local user can obtain elevated privileges on the target system.

Solution:   Red Hat has released a fix for XFree86, which is affected by this vulnerability.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2008-0512.html

Cause:   Boundary error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  2.1

Message History:   This archive entry is a follow-up to the message listed below.
Jun 11 2008 X Integer Overflow in AllocateGlyph() Lets Local Users and Remote Authenticated Users Execute Arbitrary Code



 Source Message Contents

Subject:  [RHSA-2008:0512-01] Important: XFree86 security update


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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: XFree86 security update
Advisory ID:       RHSA-2008:0512-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2008-0512.html
Issue date:        2008-06-11
CVE Names:         CVE-2008-1377 CVE-2008-1379 CVE-2008-2360 
=====================================================================

1. Summary:

Updated XFree86 packages that fix several security issues are now available
for Red Hat Enterprise Linux 2.1.

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

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1  - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux ES version 2.1 - i386
Red Hat Enterprise Linux WS version 2.1 - i386

3. 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)

An integer overflow flaw was found in X.org's Render extension. 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-2008-2360)

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.

4. 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

5. Bugs fixed (http://bugzilla.redhat.com/):

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

6. Package List:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 :

Source:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/XFree86-4.1.0-88.EL.src.rpm

i386:
XFree86-100dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-4.1.0-88.EL.i386.rpm
XFree86-75dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-15-100dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-15-75dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-2-100dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-2-75dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-9-100dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-9-75dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-Xnest-4.1.0-88.EL.i386.rpm
XFree86-Xvfb-4.1.0-88.EL.i386.rpm
XFree86-cyrillic-fonts-4.1.0-88.EL.i386.rpm
XFree86-devel-4.1.0-88.EL.i386.rpm
XFree86-doc-4.1.0-88.EL.i386.rpm
XFree86-libs-4.1.0-88.EL.i386.rpm
XFree86-tools-4.1.0-88.EL.i386.rpm
XFree86-twm-4.1.0-88.EL.i386.rpm
XFree86-xdm-4.1.0-88.EL.i386.rpm
XFree86-xf86cfg-4.1.0-88.EL.i386.rpm
XFree86-xfs-4.1.0-88.EL.i386.rpm

ia64:
XFree86-100dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-4.1.0-88.EL.ia64.rpm
XFree86-75dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-ISO8859-15-100dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-ISO8859-15-75dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-ISO8859-2-100dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-ISO8859-2-75dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-ISO8859-9-100dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-ISO8859-9-75dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-Xnest-4.1.0-88.EL.ia64.rpm
XFree86-Xvfb-4.1.0-88.EL.ia64.rpm
XFree86-cyrillic-fonts-4.1.0-88.EL.ia64.rpm
XFree86-devel-4.1.0-88.EL.ia64.rpm
XFree86-doc-4.1.0-88.EL.ia64.rpm
XFree86-libs-4.1.0-88.EL.ia64.rpm
XFree86-tools-4.1.0-88.EL.ia64.rpm
XFree86-twm-4.1.0-88.EL.ia64.rpm
XFree86-xdm-4.1.0-88.EL.ia64.rpm
XFree86-xfs-4.1.0-88.EL.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

Source:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/XFree86-4.1.0-88.EL.src.rpm

ia64:
XFree86-100dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-4.1.0-88.EL.ia64.rpm
XFree86-75dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-ISO8859-15-100dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-ISO8859-15-75dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-ISO8859-2-100dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-ISO8859-2-75dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-ISO8859-9-100dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-ISO8859-9-75dpi-fonts-4.1.0-88.EL.ia64.rpm
XFree86-Xnest-4.1.0-88.EL.ia64.rpm
XFree86-Xvfb-4.1.0-88.EL.ia64.rpm
XFree86-cyrillic-fonts-4.1.0-88.EL.ia64.rpm
XFree86-devel-4.1.0-88.EL.ia64.rpm
XFree86-doc-4.1.0-88.EL.ia64.rpm
XFree86-libs-4.1.0-88.EL.ia64.rpm
XFree86-tools-4.1.0-88.EL.ia64.rpm
XFree86-twm-4.1.0-88.EL.ia64.rpm
XFree86-xdm-4.1.0-88.EL.ia64.rpm
XFree86-xfs-4.1.0-88.EL.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

Source:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/XFree86-4.1.0-88.EL.src.rpm

i386:
XFree86-100dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-4.1.0-88.EL.i386.rpm
XFree86-75dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-15-100dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-15-75dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-2-100dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-2-75dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-9-100dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-9-75dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-Xnest-4.1.0-88.EL.i386.rpm
XFree86-Xvfb-4.1.0-88.EL.i386.rpm
XFree86-cyrillic-fonts-4.1.0-88.EL.i386.rpm
XFree86-devel-4.1.0-88.EL.i386.rpm
XFree86-doc-4.1.0-88.EL.i386.rpm
XFree86-libs-4.1.0-88.EL.i386.rpm
XFree86-tools-4.1.0-88.EL.i386.rpm
XFree86-twm-4.1.0-88.EL.i386.rpm
XFree86-xdm-4.1.0-88.EL.i386.rpm
XFree86-xf86cfg-4.1.0-88.EL.i386.rpm
XFree86-xfs-4.1.0-88.EL.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

Source:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/XFree86-4.1.0-88.EL.src.rpm

i386:
XFree86-100dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-4.1.0-88.EL.i386.rpm
XFree86-75dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-15-100dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-15-75dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-2-100dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-2-75dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-9-100dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-ISO8859-9-75dpi-fonts-4.1.0-88.EL.i386.rpm
XFree86-Xnest-4.1.0-88.EL.i386.rpm
XFree86-Xvfb-4.1.0-88.EL.i386.rpm
XFree86-cyrillic-fonts-4.1.0-88.EL.i386.rpm
XFree86-devel-4.1.0-88.EL.i386.rpm
XFree86-doc-4.1.0-88.EL.i386.rpm
XFree86-libs-4.1.0-88.EL.i386.rpm
XFree86-tools-4.1.0-88.EL.i386.rpm
XFree86-twm-4.1.0-88.EL.i386.rpm
XFree86-xdm-4.1.0-88.EL.i386.rpm
XFree86-xf86cfg-4.1.0-88.EL.i386.rpm
XFree86-xfs-4.1.0-88.EL.i386.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1377
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1379
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2360
http://www.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2008 Red Hat, Inc.
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