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AUSCERT External Security Bulletin Redistribution
ESB-2006.0666 -- [SCO][Solaris]
Buffer Overflow Vulnerability in libX11
15 September 2006
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AusCERT Security Bulletin Summary
---------------------------------
Product: libX11
Solaris 10 Operating System
Solaris 9 Operating System
Solaris 8 Operating System
Publisher: Sun Microsystems
Operating System: Solaris
SCO
Impact: Root Compromise
Execute Arbitrary Code/Commands
Access: Existing Account
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102570-1
Comment: This advisory references vulnerabilities in products which run on
platforms other than Solaris. It is recommended that administrators
runing software which utilises libX11 check for an updated version
of the software for their operating system.
This vulnerability was discovered by RISE Security who have published
the following advisory which includes proof of concept exploit code:
http://www.risesecurity.org/advisory/RISE-2006001.txt
According to the advisory published by RISE, this vulnerability was
corrected in X11R6.5.1
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Sun(sm) Alert Notification
* Sun Alert ID: 102570
* Synopsis: Buffer Overflow Vulnerability in libX11
* Category: Security
* Product: Solaris 9 Operating System, Solaris 10 Operating System,
Solaris 8 Operating System
* BugIDs: 6450316
* Avoidance: Patch, Workaround
* State: Resolved
* Date Released: 07-Sep-2006
* Date Closed: 07-Sep-2006
* Date Modified:
1. Impact
A buffer overflow vulnerability in libX11 may allow local unprivileged
users to be able to execute arbitrary code or commands with elevated
privileges. The code or commands executed would run with the
privileges of the application dynamically linked to the libX11
library. A number of programs shipped in Solaris and by third parties
dynamically link with the libX11 library and run with elevated
privileges.
Sun acknowledges with thanks, RISE Security, for bringing this issue
to our attention.
This issue is also referenced in:
http://www.risesecurity.org/advisory/RISE-2006001.txt
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* Solaris 8 without patch 119067-03
* Solaris 9 without patch 112785-56
* Solaris 10 without patch 119059-16
x86 Platform
* Solaris 8 without patch 119068-03
* Solaris 9 without patch 112786-45
* Solaris 10 without patch 119060-15
3. Symptoms
There are no predictable symptoms that would indicate the described
vulnerability has been exploited to execute arbitrary code on a
system.
4. Relief/Workaround
To work around the described issue, remove setuid(2) and setgid(2)
privileges from all programs that link with libX11.so.4.
Note: This may break the ability of these programs to perform their
functions.
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* Solaris 8 with patch 119067-03 or later
* Solaris 9 with patch 112785-56 or later
* Solaris 10 with patch 119059-16 or later
x86 Platform
* Solaris 8 with patch 119068-03 or later
* Solaris 9 with patch 112786-45 or later
* Solaris 10 with patch 119060-15 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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