Heap-based buffer overflow in the readgifimage function in the gif2tiff tool in libtiff 4.0.3 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted height and width values in a GIF image.
https://security.gentoo.org/glsa/201701-16
https://bugzilla.redhat.com/show_bug.cgi?id=996052
http://www.securityfocus.com/bid/62082
http://www.debian.org/security/2013/dsa-2744
http://secunia.com/advisories/54628
http://secunia.com/advisories/54543