The TIFFReadRawStrip1 and TIFFReadRawTile1 functions in tif_read.c in libtiff before 4.0.7 allows remote attackers to cause a denial of service (crash) or possibly obtain sensitive information via a negative index in a file-content buffer. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-6223
