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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT Security Bulletin ASB-2010.0157.2 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) Windows 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 OVERVIEW A number of vulnerabilities have been identified in libpng, which have been corrected in versions 1.4.3 and 1.2.44. IMPACT The vendor has provided the following description of these vulnerabilities: "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] MITIGATION The vendor recommends upgrading to the latest version of libpng. [1] REFERENCES [1] libpng Home Page http://www.libpng.org/pub/png/libpng.html AusCERT has made every effort to ensure that the information contained in this document is accurate. However, the decision to use the information described is the responsibility of each user or organisation. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iD8DBQFMK/qI/iFOrG6YcBERAptuAJ93Qb/SXHxaq+o/hQ9g2R2dgDdepQCbBgeX HY9nLR2fL/kbnV3sgFMTK3o= =X34l -----END PGP SIGNATURE-----