=====================================================================
                                    CERT-Renater

                         Note d'Information No. 2006/VULN280
_____________________________________________________________________

DATE                      : 26/05/2006

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Solaris running Xorg X server.

======================================================================

Sun(sm) Alert Notification
      * Sun Alert ID: 102339
      * Synopsis: Security Vulnerability in the Xorg(1) Version of the
        Render Extension
      * Category: Security
      * Product: Solaris 10 Operating System
      * BugIDs: 6416841
      * Avoidance: Workaround, Patch
      * State: Resolved
      * Date Released: 04-May-2006, 17-May-2006
      * Date Closed: 17-May-2006
      * Date Modified: 17-May-2006

1. Impact

    The Xorg X server (see Xorg(1)) is one of the X Window System display
    servers available on the Solaris x86 platform. A buffer overflow in
    the X Render extension may allow an unprivileged local or remote user
    who is a client of the Xorg X server the ability to execute arbitrary
    code with the privileges of the Xorg server. The Xorg X server runs
    with root privileges on Solaris.

    This issue is described in the following documents:
      * CVE-2006-1526 at:
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-1526
      * http://lists.freedesktop.org/archives/xorg/2006-May/015136.html

2. Contributing Factors

    This issue can occur in the following release:

    x86 Platform
      * Solaris 10 without patch 118966-20

    Note: Solaris 8 and Solaris 9 are not affected by this issue. Solaris
    10 on the SPARC platform is also not affected.

    The described issue only occurs on systems with the SUNWxorg packages
    installed. To determine if the SUNWxorg packages are installed on the
    system, the following command can be used:
     pkginfo SUNWxorg-server


3. Symptoms

    There are no predictable symptoms that would show the described issue
    has been exploited.

4. Relief/Workaround

    To work around the described issue, disable the Render extension by
    putting the following in the xorg.conf(4) file:
     Section "Extensions"
     Option "RENDER" "disable"
     EndSection

    Note: After applying this workaround, applications requiring the
    Render extension may not run.

5. Resolution

    This issue is addressed in the following release:

    x86 Platform
      * Solaris 10 with patch 118966-20 or later

Change History

    17-May-2006:
      * State: Resolved
      * Updated Contributing Factors, Relief/Workaround, and Resolution
        sections

    This Sun Alert notification is being provided to you on an "AS IS"
    basis. This Sun Alert notification may contain information provided by
    third parties. The issues described in this Sun Alert notification may
    or may not impact your system(s). Sun makes no representations,
    warranties, or guarantees as to the information contained herein. ANY
    AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
    WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
    NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
    YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
    INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
    OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
    This Sun Alert notification contains Sun proprietary and confidential
    information. It is being provided to you pursuant to the provisions of
    your agreement to purchase services from Sun, or, if you do not have
    such an agreement, the Sun.com Terms of Use. This Sun Alert
    notification may only be used for the purposes contemplated by these
    agreements.

    Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
    Clara, CA 95054 U.S.A. All rights reserved

======================================================================

           =========================================================
           Les serveurs de référence du CERT-Renater
           http://www.urec.fr/securite
           http://www.cru.fr/securite
           http://www.renater.fr
           =========================================================
           + CERT-RENATER          | tel : 01-53-94-20-44          +
           + 151 bd de l'Hopital   | fax : 01-53-94-20-41          +
           + 75013 Paris           | email: certsvp@renater.fr     +
           =========================================================