CVE-2018-17000

Name	CVE-2018-17000
Description	A NULL pointer dereference in the function _TIFFmemcmp at tif_unix.c (called from TIFFWriteDirectoryTagTransferfunction) in LibTIFF 4.0.9 allows an attacker to cause a denial-of-service through a crafted tiff file. This vulnerability can be triggered by the executable tiffcp.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severity	medium (attack range: remote)
Debian Bugs	908778

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
tiff (PTS)	jessie	4.0.3-12.3+deb8u5	vulnerable
	jessie (security)	4.0.3-12.3+deb8u7	vulnerable
	stretch	4.0.8-2+deb9u2	vulnerable
	stretch (security)	4.0.8-2+deb9u4	vulnerable
	buster, sid	4.0.10-3	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
tiff	source	(unstable)	(unfixed)	medium		908778
tiff3	source	(unstable)	(unfixed)	medium

Notes

[stretch] - tiff <postponed> (Minor issue)
[jessie] - tiff <postponed> (Can be fixed along in future DLA)
http://bugzilla.maptools.org/show_bug.cgi?id=2811