Off-by-one error in the t2p_readwrite_pdf_image_tile function in tools/tiff2pdf.c in LibTIFF 4.0.7 allows remote attackers to have unspecified impact via a crafted image.
https://blogs.gentoo.org/ago/2017/01/01/libtiff-multiple-heap-based-buffer-overflow/
https://github.com/vadz/libtiff/commit/c7153361a4041260719b340f73f2f76
http://www.debian.org/security/2017/dsa-3762