Buffer overflow in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4, when used by an application that calls the png_rgb_to_gray function but not the png_set_expand function, allows remote attackers to overwrite memory with an arbitrary amount of data, and possibly have unspecified other impact, via a crafted PNG image.
https://exchange.xforce.ibmcloud.com/vulnerabilities/68538
https://bugzilla.redhat.com/show_bug.cgi?id=720607
http://www.ubuntu.com/usn/USN-1175-1
http://www.securityfocus.com/bid/48660
http://www.openwall.com/lists/oss-security/2011/07/13/2
http://www.libpng.org/pub/png/libpng.html
http://www.debian.org/security/2011/dsa-2287
http://support.apple.com/kb/HT5002
http://security.gentoo.org/glsa/glsa-201206-15.xml
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063118.html
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html