The _TIFFVGetField function in tif_dirinfo.c in LibTIFF 4.0.6 and earlier allows remote attackers to cause a denial of service (out-of-bounds write) or execute arbitrary code via a crafted TIFF image.
https://security.gentoo.org/glsa/201701-16
https://bugzilla.redhat.com/show_bug.cgi?id=1325095
http://www.securityfocus.com/bid/85960
http://www.securityfocus.com/bid/85953
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
http://www.openwall.com/lists/oss-security/2016/04/08/9
http://rhn.redhat.com/errata/RHSA-2016-1547.html