Heap-based buffer overflow in the KiSS CEL file format plug-in in GIMP 2.8.x and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted KiSS palette file, which triggers an "invalid free."
https://bugzilla.redhat.com/show_bug.cgi?id=839020
http://www.ubuntu.com/usn/USN-1559-1
http://www.openwall.com/lists/oss-security/2012/08/20/7
http://rhn.redhat.com/errata/RHSA-2012-1181.html
http://rhn.redhat.com/errata/RHSA-2012-1180.html
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00020.html