The OJPEGPostDecode function in tif_ojpeg.c in LibTIFF 3.9.0 and 3.9.2, as used in tiff2ps, allows remote attackers to cause a denial of service (assertion failure and application exit) via a crafted TIFF image, related to "downsampled OJPEG input."
http://security.gentoo.org/glsa/glsa-201209-02.xml
http://secunia.com/advisories/50726
http://secunia.com/advisories/40422