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AUSCERT External Security Bulletin Redistribution
ESB-2008.0060 -- [Solaris]
Security Vulnerability in the libxml2 Library may Lead to a
Denial of Service (DoS)
13 February 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: libxml2
Publisher: Sun Microsystems
Operating System: Solaris
Impact: Denial of Service
Access: Remote/Unauthenticated
CVE Names: CVE-2007-6284
Ref: ESB-2008.0045
ESB-2008.0043
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-103201-1
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-201514-1
Revision History: February 13 2008: Final Resoultion
January 16 2008: Initial Release
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Solution Type: Sun Alert
Solution 201514 : Security Vulnerability in the libxml2 Library May
Lead to a Denial of Service (DoS)
Previously Published As: 103201
Product
Solaris 9 Operating System
Solaris 10 Operating System
Bug ID: 6642649
Date of Workaround Release: 14-JAN-2008
Date of Resolved Release: 11-Feb-2008
SA Document Body
a security vulnerability in the libxml2 library (see libxml2(3)) bundled with S
olaris 9 and Solaris 10 (see below for full details)
1. Impact
There is a security vulnerability in the libxml2 library (see
libxml2(3)) bundled with Solaris 9 and Solaris 10 which may impact
applications making use of this library. The precise impact will vary
depending on the application, but this vulnerability may allow a local
or remote unprivileged user who provides a specially crafted XML file
to cause a denial of service (DoS) to the application which is using
the libxml2 library (or potentially to the system as a whole as the
application may consume excessive resources).
Additional information regarding this issue is available at:
* CVE-2007-6284 at: CVE-2007-6284 at:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6284
2. Contributing Factors
These issues can occur in the following releases:
SPARC Platform
* Solaris 9 without patch 114014-18
* Solaris 10 without patch 125731-02
x86 Platform
* Solaris 9 without patch 114015-18
* Solaris 10 without patch 125732-02
Note: Solaris 8 does not include support for libxml2 and is not
impacted by this issue.
3. Symptoms
If the described issue is exploited, the application which makes use
of the libxml2 library to process the crafted XML file may be
unresponsive, possibly consuming all available CPU resources while
looping continuously. Commands such as prstat(1M) can be used to
determine the utilization of system resources, for example:
$ prstat -s cpu
[...]
4. Workaround
Please see Resolution below.
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* Solaris 9 with patch 114014-18 or later
* Solaris 10 with patch 125731-02 or later
x86 Platform
* Solaris 9 with patch 114015-18 or later
* Solaris 10 with patch 125732-02 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 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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