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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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