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.
https://bugzilla.redhat.com/show_bug.cgi?id=1185812
http://www.conostix.com/pub/adv/CVE-2014-8128-LibTIFF-Out-of-bounds_Writes.txt
http://support.apple.com/kb/HT204942
http://support.apple.com/kb/HT204941
http://openwall.com/lists/oss-security/2015/01/24/15
http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html
http://lists.apple.com/archives/security-announce/2015/Jun/msg00001.html