Integer overflow in the ReadImage function in plug-ins/common/file-gif-load.c in the GIF image format plug-in in GIMP 2.8.x and earlier allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted height and len properties in a GIF image file, which triggers a heap-based buffer overflow. NOTE: some of these details are obtained from third party information.
https://bugzilla.redhat.com/show_bug.cgi?id=847303
https://bugzilla.novell.com/show_bug.cgi?id=776572
http://www.ubuntu.com/usn/USN-1559-1
http://www.securitytracker.com/id?1027411
http://www.securityfocus.com/bid/55101
http://www.openwall.com/lists/oss-security/2012/08/20/8
http://rhn.redhat.com/errata/RHSA-2012-1181.html
http://rhn.redhat.com/errata/RHSA-2012-1180.html
http://lists.opensuse.org/opensuse-updates/2012-09/msg00043.html
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00023.html