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                         AUSCERT Security Bulletin

        A number of vulnerabilities have been identified in libpng
                                1 July 2010


        AusCERT Security Bulletin Summary

Product:              libpng prior to 1.4.3
                      libpng prior to 1.2.44
Operating System:     UNIX variants (UNIX, Linux, OSX)
Impact/Access:        Execute Arbitrary Code/Commands -- Remote with User Interaction
                      Denial of Service               -- Remote with User Interaction
Resolution:           Patch/Upgrade
CVE Names:            CVE-2010-1205 CVE-2010-2249 
Member content until: Thursday, July 29 2010

Revision History:     July  1 2010: Added CVE reference
                      June 29 2010: Initial Release


        A number of vulnerabilities have been identified in libpng, which have 
        been corrected in versions 1.4.3 and 1.2.44.


        The vendor has provided the following description of these
        "Several versions of libpng through 1.4.2 (and through 1.2.43 in the 
        older series) contain a bug whereby progressive applications such as 
        web browsers (or the rpng2 demo app included in libpng) could receive 
        an extra row of image data beyond the height reported in the header, 
        potentially leading to an out-of-bounds write to memory (depending on 
        how the application is written) and the possibility of execution of 
        an attacker's code with the privileges of the libpng user (including 
        remote compromise in the case of a libpng-based browser visiting a 
        hostile web site). This vulnerability has been assigned ID 
        CVE-2010-1205 (via Mozilla).
        An additional memory-leak bug, involving images with malformed sCAL 
        chunks, is also present; it could lead to an application crash 
        (denial of service) when viewing such images." [1]


        The vendor recommends upgrading to the latest version of libpng. [1]


        [1] libpng Home Page

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The University of Queensland
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