The rgb2ycbcr tool in LibTIFF 4.0.6 and earlier allows remote attackers to cause a denial of service (divide-by-zero) by setting the (1) v or (2) h parameter to 0.
https://security.gentoo.org/glsa/201701-16
https://euvd.enisa.europa.eu/vulnerability/EUVD-2016-4649
http://www.securityfocus.com/bid/85952
http://www.openwall.com/lists/oss-security/2016/04/08/3
http://www.debian.org/security/2017/dsa-3762
http://lists.opensuse.org/opensuse-updates/2016-09/msg00039.html