LibTIFF prior to 4.0.4, as used in Apple iOS before 8.4 and OS X before 10.10.4 and other products, allows remote attackers to cause a denial of service (out-of-bounds write) via a crafted TIFF image.
http://lists.apple.com/archives/security-announce/2015/Jun/msg00001.html
http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html
http://openwall.com/lists/oss-security/2015/01/24/15
https://bugzilla.redhat.com/show_bug.cgi?id=1185812