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ESB-2009.1425 - [Solaris][OpenSolaris] libpng: Access confidential data - Remote with user interaction

Date: 16 October 2009
References: AA-2009.0139  

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2009.1425
  Security Vulnerability in Solaris libpng(3) May Allow a Remote User to
       Disclose Potentially Sensitive Information from Applications
                            Linked to libpng(3)
                              16 October 2009

===========================================================================

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

Product:           libpng
Publisher:         Sun Microsystems
Operating System:  Solaris 8 Operating System
                   Solaris 9 Operating System
                   Solaris 10 Operating System
                   OpenSolaris
Impact/Access:     Access Confidential Data -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2009-2042  

Reference:         AA-2009.0139

Original Bulletin: 
   http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-269788-1

- --------------------------BEGIN INCLUDED TEXT--------------------

Solution Type: Sun Alert

Solution  269788 :   Security Vulnerability in Solaris libpng(3) May
Allow a Remote User to Disclose Potentially Sensitive Information from
Applications Linked to libpng(3)
          
Bug ID: 6874973

Product:
Solaris 8 Operating System
Solaris 9 Operating System
Solaris 10 Operating System
OpenSolaris

Date of Workaround Release: 14-Oct-2009

SA Document Body

Multiple security vulnerabilities in libpng(3):


1. Impact

Multiple security vulnerabilities in libpng(3), which is shipped with
Solaris, may allow a local or remote unprivileged user to disclose
potentially sensitive information associated with applications linked
to libpng(3), when a user has loaded a specially crafted Portable
Network Graphics (PNG) format image file (.png) supplied by an
untrusted user.
These issues are also described in the following document:
    CVE-2009-2042 at:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2042

2. Contributing Factors

These issues can occur in the following releases:
SPARC Platform
  * GNOME 2.0 (for Solaris 8)
  * Solaris 9
  * Solaris 10
  * OpenSolaris builds snv_01 through snv_123

x86 Platform
  * GNOME 2.0 (for Solaris 8)
  * Solaris 9
  * Solaris 10
  * OpenSolaris builds snv_01 through snv_123

Note 1: To determine if an application has a dynamic dependency on the
libpng(3) library, the ldd(1) utility can be used:
 $ ldd /bin/evince | grep libpng
 libpng12.so.0 => /usr/lib/libpng12.so.0

However, some applications may use libpng(3) but not report libpng(3)
as a dynamic dependency with ldd(1) if the library is loaded by
dlopen(3C). Therefore, to display all shared objects used by an
application, pldd(1) should be used against the running process:
 $ pldd <pid of application> | grep libpng
 /usr/lib/libpng12.so.0.35.0

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_86


3. Symptoms

There are no predictable symptoms that would indicate the described
issues have been exploited.

4. Workaround

To work around the described issues , do not load PNG files from
untrusted sources (or to be completely safe, do not view any PNG
files).

5. Resolution

These issues are addressed in the following releases:
SPARC Platform
  * OpenSolaris based upon builds snv_124 or later

x86 Platform
  * OpenSolaris based upon builds snv_124 or later

A final resolution is pending completion.
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

- --------------------------END INCLUDED TEXT--------------------

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
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                On call after hours for member emergencies only.
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