The cvtClump function in the rgb2ycbcr tool in LibTIFF 4.0.6 and earlier allows remote attackers to cause a denial of service (out-of-bounds write) by setting the “-v” option to -1.
bugzilla.maptools.org/show_bug.cgi?id=2568
www.debian.org/security/2017/dsa-3762
www.openwall.com/lists/oss-security/2016/04/08/4
www.securityfocus.com/bid/85956
security.gentoo.org/glsa/201701-16