A NULL Pointer Dereference occurs in the function TIFFPrintDirectory in tif_print.c in LibTIFF 3.9.3, 3.9.4, 3.9.5, 3.9.6, 3.9.7, 4.0.0alpha4, 4.0.0alpha5, 4.0.0alpha6, 4.0.0beta7, 4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.4beta, 4.0.5, 4.0.6, 4.0.7, 4.0.8 and 4.0.9 when using the tiffinfo tool to print crafted TIFF information, a different vulnerability than CVE-2017-18013. (This affects an earlier part of the TIFFPrintDirectory function that was not addressed by the CVE-2017-18013 patch.)
bugzilla.maptools.org/show_bug.cgi?id=2778
access.redhat.com/errata/RHSA-2019:2051
access.redhat.com/errata/RHSA-2019:2053
github.com/xiaoqx/pocs/tree/master/libtiff
gitlab.com/libtiff/libtiff/commit/be4c85b16e8801a16eec25e80eb9f3dd6a96731b
lists.debian.org/debian-lts-announce/2018/04/msg00010.html
lists.debian.org/debian-lts-announce/2018/04/msg00011.html
lists.debian.org/debian-lts-announce/2018/07/msg00002.html
usn.ubuntu.com/3864-1/
www.debian.org/security/2018/dsa-4349