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             AUSCERT External Security Bulletin Redistribution

                               ESB-2009.1219
A Security Vulnerability Involving xscreensaver(1) and Assistive Technology
        Support May Allow an Unauthorized User to Access the System
                              26 August 2009

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           xscreensaver
                   Assistive Technology Support
Publisher:         Sun Microsystems
Operating System:  Solaris
                   OpenSolaris
Impact/Access:     Unauthorised Access -- Console/Physical
Resolution:        Patch/Upgrade

Original Bulletin: 
   http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-259388-1

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   Solution Type: Sun Alert
   Solution  259388 :   A Security Vulnerability Involving
   xscreensaver(1) and Assistive Technology Support May Allow an
   Unauthorized User to Access the System          
   Bug ID: 6736157

   Product
   Solaris 10 Operating System
   OpenSolaris

   Date of Resolved Release: 11-Aug-2009

   SA Document Body
   A security vulnerability involving xscreensaver(1) and Assistive 
   Technology Support:

   1. Impact
   A security vulnerability involving xscreensaver(1) and Assistive
   Technology Support may allow a local user with physical access to a
   system to be able to unlock an X display which has been locked using
   xscreensaver(1) and thus gain unauthorized access to the system.
   
   2. Contributing Factors
   This issue can occur in the following releases:
   SPARC Platform
     * Solaris 10 without patch 120094-24
     * OpenSolaris based upon builds snv_01 through snv_110

   x86 Platform
     * Solaris 10 without patch 120095-24
     * OpenSolaris based upon builds snv_01 through snv_110

   Note 1: Solaris 8 and Solaris 9 are not impacted by this issue.
   Note 2: OpenSolaris distributions may include additional bug fixes
   above and beyond the build from which it was derived.  To determine
   the base build of OpenSolaris, the following command can be used:
    $ uname -v
    snv_101

   This issue only occurs on systems that have the "Assistive
   Technologies" feature enabled. To determine if this feature is
   enabled, the following command can be used:
    $ gnome-at-properties

   In the popup box, "Enable Assistive Technologies" will be checked.

   3. Symptoms
   There are no predictable symptoms that would indicate the described
   vulnerability has been exploited.
   
   4. Workaround
   To work around the described issue, Assistive Technology can be
   temporarily disabled by using the following command:
    $gnome-at-properties

   Uncheck "Enable Assistive Technologies" in the popup box.
   5. Resolution
   This issue is addressed in the following releases:
   SPARC Platform
     * Solaris 10 with patch 120094-24
     * OpenSolaris based upon builds snv_111 or later

   x86 Platform
     * Solaris 10 with patch 120095-24 or later
     * OpenSolaris based upon builds snv_111 or later

   For more information on Security Sun Alerts, see Technical
   Instruction ID 213557.
   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 2000-2009 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved

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