LibTIFF 4.0.3 allows remote attackers to cause a denial of service (out-of-bounds write) or possibly have unspecified other impact via a crafted TIFF image, as demonstrated by failure of tif_next.c to verify that the BitsPerSample value is 2, and the t2p_sample_lab_signed_to_unsigned function in tiff2pdf.c.
https://www.debian.org/security/2015/dsa-3273
https://security.gentoo.org/glsa/201701-16
http://www.securitytracker.com/id/1032760
http://www.securityfocus.com/bid/72352
http://www.conostix.com/pub/adv/CVE-2014-8129-LibTIFF-Out-of-bounds_Reads_and_Writes.txt
http://support.apple.com/kb/HT204942
http://support.apple.com/kb/HT204941