Multiple stack-based buffer overflows in file-xwd.c in the X Window Dump (XWD) plug-in in GIMP 2.8.2 allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a large (1) red, (2) green, or (3) blue color mask in an XWD file.
http://www.ubuntu.com/usn/USN-1659-1
http://www.securityfocus.com/bid/56647
http://www.openwall.com/lists/oss-security/2012/11/27/1
http://lists.opensuse.org/opensuse-updates/2013-01/msg00014.html
http://lists.opensuse.org/opensuse-updates/2012-12/msg00017.html
http://git.gnome.org/browse/gimp/commit/?id=2873262fccba12af144ed96ed91be144d92ff2e1