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AUSCERT External Security Bulletin Redistribution
ESB-2007.0482 -- [Solaris]
dtsession(1X) Contains a Buffer Overflow Vulnerability
3 July 2007
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AusCERT Security Bulletin Summary
---------------------------------
Product: dtsession
Publisher: Sun Microsystems
Operating System: Solaris
Impact: Root Compromise
Access: Existing Account
CVE Names: CVE-2007-3471
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102954-1
Revision History: July 3 2007: Added CVE Name
June 29 2007: Initial Release
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Sun(sm) Alert Notification
* Sun Alert ID: 102954
* Synopsis: dtsession(1X) Contains a Buffer Overflow Vulnerability
* Category: Security
* Product: Solaris 9 Operating System, Solaris 10 Operating System,
Solaris 8 Operating System
* BugIDs: 6547678
* Avoidance: Patch, Workaround
* State: Resolved
* Date Released: 27-Jun-2007
* Date Closed: 27-Jun-2007
* Date Modified:
1. Impact
An unprivileged local user may be able to execute arbitrary code or
commands with the privileges of the dtsession(1X) Common Desktop
Environment (CDE) Session Manager. The dtsession(1X) CDE Session
Manager runs with root privileges.
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* Solaris 8 without patch 109354-26
* Solaris 9 without patch 113240-13
* Solaris 10 without patch 125279-02
x86 Platform
* Solaris 8 without patch 109355-25
* Solaris 9 without patch 113241-13
* Solaris 10 without patch 125280-02
3. Symptoms
There are no predictable symptoms that would indicate this issue has
been exploited.
4. Relief/Workaround
To work around the described issue, turn off the set-user-ID
("setuid") bit for dtsession(1X) as root:
#chmod 0555 /usr/dt/bin/dtsession
Note 1: For CDE users this will cause dtsession(1X) to be unable to
unlock the screen by the list of keyholders (including root) as well
as prevent users with accounts defined in /etc/passwd to be unable to
unlock the screen. CDE users with accounts defined in NIS, NIS+, or
LDAP will still be able to unlock the screen.
Note 2: CDE users with accounts defined in /etc/passwd should use
xlock(1) to lock their X display and turn off automatic session
locking by dtsession(1X). Automatic session locking by dtsession(1X)
can be turned off using the CDE Style Manager's (dtstyle(1X)) screen
option. From the dtstyle(1X) screen option window, automatic session
locking can be turned off by selecting "off" for the Screen Saver and
Screen Lock options. To lock the X display using xlock(1) the xlock(1)
command can be executed from the command line of a terminal window.
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* Solaris 8 with patch 109354-26 or later
* Solaris 9 with patch 113240-13 or later
* Solaris 10 with patch 125279-02 or later
x86 Platform
* Solaris 8 with patch 109355-25 or later
* Solaris 9 with patch 113241-13 or later
* Solaris 10 with patch 125280-02 or later
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
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