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             AUSCERT External Security Bulletin Redistribution

                        ESB-2007.0490 -- [Solaris]
        libpng(3) Contains a Denial of Service (DoS) Vulnerability
                              20 October 2008

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

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

Product:              libpng
Publisher:            Sun Microsystems
Operating System:     Solaris
Impact:               Denial of Service
Access:               Remote/Unauthenticated
CVE Names:            CVE-2007-2445

Ref:                  ESB-2007.0334

Original Bulletin:    
  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-200871-1

Revision History:     October 20 2008: Patches released for Solaris 8 
                                       and 9
                      May 26 2008:     patch 137081-01 now available for 
                                       Solaris 10
                      July  2 2007:    Initial Release

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   Solution Type: Sun Alert
   Solution  200871 :   libpng(3) Contains a Denial of Service (DoS)
   Vulnerability          
   Previously Published As: 102987

   Bug ID: 6555900

   Product
   Solaris 8 Operating System
   Solaris 9 Operating System
   Solaris 10 Operating System

   Date of Workaround Release: 28-JUN-2007

   SA Document Body
   A remote unprivileged user may be able to crash an application which 
   dynamically links to the Portable Network Graphics library (see below 
   for details) :

   1. Impact

   A remote unprivileged user may be able to crash an application which
   dynamically links to the Portable Network Graphics library (libpng(3))
   due to a security vulnerability in libpng(3). The ability to crash an
   application is a type of Denial of Service (DoS). A number of
   applications which comprise the GNOME desktop environment dynamically
   link with libpng(3).

   This issue is described in the following documents:
     * CERT VU# 684664 at: https://www.kb.cert.org/vuls/id/684664
     * CVE-2007-2445 at:
       http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2445

   2. Contributing Factors

   This issue can occur in the following releases:

   SPARC Platform
     * Solaris 8 without patch 114816-03
     * Solaris 9 without patch 139382-01 and 114822-05
     * Solaris 10 without patch 137080-01

   x86 Platform
     * Solaris 8 without patch 114817-03
     * Solaris 9 without  patch 139382-01
     * Solaris 9 with JDS release 2
     * Solaris 10 without patch 137081-01

   To determine if JDS release 2 is installed on a Solaris 9 x86 system,
   the following command can be run:
    % grep distributor-version /usr/share/gnome-about/gnome-version.xml
    <distributor-version>Sun Java Desktop System, Release 2</distributor-version>

   3. Symptoms

   If the described issue occurs, the application which links to the
   libpng(3) library will exit and may generate an error message about a
   Segmentation Fault and may also write a core(4) file.
  
   4. Workaround

   To work around the described issue, only load images from trusted
   sources.
   5. Resolution
   This issue is addressed in the following releases:
   
   SPARC Platform
     * Solaris 8 with patch 114816-03 or later
     * Solaris 9 with patch 139382-01 or later and 114822-05 or
       later
     * Solaris 10 with patch 137080-01 or later

   x86 Platform
     * Solaris 8 with patch 114817-03 or later
     * Solaris 9 with patch 139382-01 or later
     * Solaris 10 with patch 137081-01 or later

   A final resolution is pending completion for Solaris 9 with JDS
   release 2.

   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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