libpng 1.0.6 through 1.0.32, 1.2.0 through 1.2.26, and 1.4.0beta01 through 1.4.0beta19 allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via a PNG file with zero length "unknown" chunks, which trigger an access of uninitialized memory.
https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00960.html
https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00951.html
https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00721.html
https://www.redhat.com/archives/fedora-package-announce/2008-June/msg00111.html
https://www.redhat.com/archives/fedora-package-announce/2008-June/msg00080.html
https://www.redhat.com/archives/fedora-package-announce/2008-June/msg00033.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6275
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10326
https://exchange.xforce.ibmcloud.com/vulnerabilities/41800
http://www.vupen.com/english/advisories/2009/1560
http://www.vupen.com/english/advisories/2009/1462
http://www.vupen.com/english/advisories/2009/1451
http://www.vupen.com/english/advisories/2009/1297
http://www.vupen.com/english/advisories/2008/2584
http://www.vupen.com/english/advisories/2008/1225/references
http://www.vmware.com/security/advisories/VMSA-2009-0007.html
http://www.us-cert.gov/cas/techalerts/TA09-133A.html
http://www.us-cert.gov/cas/techalerts/TA08-260A.html
http://www.securitytracker.com/id?1019840
http://www.securityfocus.com/bid/28770
http://www.securityfocus.com/archive/1/503912/100/0/threaded
http://www.securityfocus.com/archive/1/491424/100/0/threaded
http://www.securityfocus.com/archive/1/490823/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2009-0333.html
http://www.ocert.org/advisories/ocert-2008-003.html
http://www.mandriva.com/security/advisories?name=MDVSA-2008:156
http://www.debian.org/security/2009/dsa-1750
http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0151
http://support.avaya.com/elmodocs2/security/ASA-2009-208.htm
http://support.apple.com/kb/HT3549
http://sunsolve.sun.com/search/document.do?assetkey=1-77-1020521.1-1
http://sunsolve.sun.com/search/document.do?assetkey=1-66-259989-1
http://slackware.com/security/viewer.php?l=slackware-security&y=2008&m=slackware-security.541247
http://security.gentoo.org/glsa/glsa-200812-15.xml
http://security.gentoo.org/glsa/glsa-200805-10.xml
http://security.gentoo.org/glsa/glsa-200804-15.xml
http://secunia.com/advisories/35386
http://secunia.com/advisories/35302
http://secunia.com/advisories/35258
http://secunia.com/advisories/35074
http://secunia.com/advisories/34388
http://secunia.com/advisories/34152
http://secunia.com/advisories/33137
http://secunia.com/advisories/31882
http://secunia.com/advisories/30486
http://secunia.com/advisories/30402
http://secunia.com/advisories/30174
http://secunia.com/advisories/30157
http://secunia.com/advisories/30009
http://secunia.com/advisories/29992
http://secunia.com/advisories/29957
http://secunia.com/advisories/29792
http://secunia.com/advisories/29678
http://lists.opensuse.org/opensuse-security-announce/2008-04/msg00011.html
http://lists.apple.com/archives/security-announce/2009/May/msg00002.html
http://lists.apple.com/archives/security-announce//2008/Sep/msg00005.html