Heap-based buffer overflow in the PackBitsPreEncode function in tif_packbits.c in bmp2tiff in libtiff 4.0.6 and earlier allows remote attackers to execute arbitrary code or cause a denial of service via a large width field in a BMP image. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-8668
