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Fencer Vulns
medium 6.5

CVE-2018-17000 json

A NULL pointer dereference in the function _TIFFmemcmp at tif_unix.c (called from TIFFWriteDirectoryTagTransferfunction) in LibTIFF 4.0.9 a…

published 2018-09-13 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-8784

cvss
6.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

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.

Patch / fix

  • tiff Debian 14, Debian 13, Debian 12 4.0.10-4

debian advisories DEBIAN-CVE-2018-17000

  • tiff Ubuntu 14.04 LTS 4.0.3-7ubuntu0.11
  • tiff Ubuntu 16.04 LTS 4.0.6-1ubuntu0.6
  • tiff Ubuntu 18.04 LTS 4.0.9-5ubuntu0.2

ubuntu advisories UBUNTU-CVE-2018-17000

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • tiff SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +4 more 4.0.9-44.42.1
  • tiff SLE Module for Package Hub 15, SLE Module for Desktop Applications 15, SLE Module for Basesystem 15 4.0.9-5.27.5

suse advisories SUSE-SU-2019:3058-1SUSE-SU-2019:0786-1

  • tiff openSUSE Tumbleweed 4.3.0-1.3
  • tiff openSUSE Leap 15.0 4.0.9-lp150.4.16.1

opensuse advisories openSUSE-SU-2024:11461-1openSUSE-SU-2019:1161-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-17000 updated cvss 4.7

libtiff: NULL pointer dereference in function _TIFFmemcmp at tif_unix.c

  • Red Hat Enterprise Linux 5 libtiff Red Hat Enterprise Linux 6 libtiff Red Hat Enterprise Linux 7 libtiff, libtiff-tools, compat-libtiff3 Red Hat Enterprise Linux 8 libtiff, libtiff-tools, mingw-libtiff, mingw32-libtiff, mingw64-libtiff
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.25% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.maptools.org http://bugzilla.maptools.org/show_bug.cgi?id=2811 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.