Multiple off-by-one errors in libpng before 1.2.32beta01, and 1.4 before 1.4.0beta34, allow context-dependent attackers to cause a denial of service (crash) or have unspecified other impact via a PNG image with crafted zTXt chunks, related to (1) the png_push_read_zTXt function in pngread.c, and possibly related to (2) pngtest.c.
http://secunia.com/advisories/31781
http://secunia.com/advisories/33137
http://secunia.com/advisories/35302
http://secunia.com/advisories/35386
http://security.gentoo.org/glsa/glsa-200812-15.xml
https://exchange.xforce.ibmcloud.com/vulnerabilities/44928
http://sourceforge.net/project/shownotes.php?group_id=5624&release_id=624517
http://sourceforge.net/tracker/index.php?func=detail&aid=2095669&group_id=5624&atid=105624
http://support.avaya.com/elmodocs2/security/ASA-2009-208.htm
http://www.kb.cert.org/vuls/id/889484
http://www.openwall.com/lists/oss-security/2008/09/09/3
http://www.openwall.com/lists/oss-security/2008/09/09/8
http://www.vupen.com/english/advisories/2008/2512