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             AUSCERT External Security Bulletin Redistribution

                               ESB-2009.1597
         Multiple Security Vulnerabilities in the libexpat Library
              May Lead to a Denial of Service (DoS) Condition
                              4 December 2009

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

Product:           libexpat
Publisher:         Sun Microsystems
Operating System:  Solaris
Impact/Access:     Denial of Service -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2009-3720 CVE-2009-3560 

Reference:         ESB-2009.1512

Original Bulletin: 
   http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-273630-1

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Multiple Security Vulnerabilities in the libexpat Library May Lead to
a Denial of Service (DoS) Condition
  _________________________________________________________________

Category : Security
Release Phase : Workaround
Bug Id : 6905480
Product : Solaris 10 Operating System
OpenSolaris
Date of Workaround Release : 02-Dec-2009

Multiple Security Vulnerabilities in the libexpat Library May Lead to a Denial 
of Service (DoS) Condition

1. Impact

Multiple security vulnerabilities have been identified in libexpat, a
library for parsing XML files. These vulnerabilities may allow a local
or remote unprivileged user to create a crafted XML file that may
cause an application linked with libexpat to crash, resulting in a
Denial of Service (DoS) condition.
Additional information regarding these issues is available at:

CVE-2009-3720 at
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3720
CVE-2009-3560 at
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3560

2. Contributing Factors

These issues can occur in the following releases:
SPARC Platform
  * Solaris 10
  * OpenSolaris based upon builds snv_01 through snv_129

x86 Platform
  * Solaris 10
  * OpenSolaris based upon builds snv_01 through snv_129

Note: Solaris 8 and 9 do not bundle libexpat, therefore are not
impacted by these issues.
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_111

3. Symptoms

If the described issues have been exploited, the application which
makes use of the libexpat library will crash, potentially leaving a
core file depending on the system configuration.

4. Workaround
The following T-Patches are available from
http://sunsolve.sun.com/tpatches for the following releases:
SPARC Platform
  * Solaris 10 T-Patch T137147-05

x86 Platform
  * Solaris 10 T-Patch T137148-05

Note: This document refers to one or more preliminary temporary
patches (T-Patches) which are designed to address the concerns
identified herein. Sun has limited experience with these patches due
to their preliminary nature. As such, you should only install the
patches on systems meeting the configurations described above. Sun may
release full patches at a later date, however, Sun is under no
obligation whatsoever to create, release, or distribute any such
patch.

5. Resolution

These issues are addressed in the following releases:

SPARC Platform
  * OpenSolaris based upon builds snv_130 or later

x86 Platform
  * OpenSolaris based upon builds snv_130 or later

A final resolution is pending completion for Solaris 10.
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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