In LibTIFF 4.0.9, there is a Null-Pointer Dereference in the tif_print.c TIFFPrintDirectory function, as demonstrated by a tiffinfo crash.
http://bugzilla.maptools.org/show_bug.cgi?id=2770
http://www.securityfocus.com/bid/102345
https://gitlab.com/libtiff/libtiff/commit/c6f41df7b581402dfba3c19a1e3df4454c551a01
https://lists.debian.org/debian-lts-announce/2018/01/msg00033.html
https://lists.debian.org/debian-lts-announce/2018/01/msg00034.html
https://usn.ubuntu.com/3602-1/
Source: MITRE
Published: 2018-01-01
Updated: 2018-03-28
Type: CWE-476
Base Score: 4.3
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 2.8
Severity: MEDIUM