The TIFFFetchNormalTag function in LibTiff 4.0.6 allows remote attackers to cause a denial of service (out-of-bounds read) via crafted TIFF_SETGET_C16ASCII or TIFF_SETGET_C32_ASCII tag values. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-9297