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Fencer Vulns
medium 6.5

CVE-2023-3618 json

Segmentation fault in fax3encode in libtiff/tif_fax3.c

published 2023-07-12 3 y ago modified 2026-07-25 3 mo ago also EUVD-2023-44267 , JLSEC-2025-308

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits
0
none known

Summary

A flaw was found in libtiff. A specially crafted tiff file can lead to a segmentation fault due to a buffer overflow in the Fax3Encode function in libtiff/tif_fax3.c, resulting in a denial of service.

Patch / fix

  • julia Libtiff_jll 4.5.1+0
  • libtiff libtiff 4.5.1
  • tiff Debian 12 4.5.0-6+deb12u2
  • tiff Debian 14, Debian 13 4.5.1~rc3-1

debian advisories DEBIAN-CVE-2023-3618

  • tiff Ubuntu 20.04 LTS 4.1.0+git191117-2ubuntu0.20.04.9
  • tiff Ubuntu 22.04 LTS 4.3.0-6ubuntu0.5
  • tiff Ubuntu Pro 14.04 LTS 4.0.3-7ubuntu0.11+esm9
  • tiff Ubuntu Pro 16.04 LTS 4.0.6-1ubuntu0.8+esm12
  • tiff Ubuntu Pro 18.04 LTS 4.0.9-5ubuntu0.10+esm2

ubuntu advisories UBUNTU-CVE-2023-3618

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

  • libtiff RHEL 9 4.4.0-12.el9
  • libtiff-tools RHEL 9 4.4.0-12.el9

red hat advisories RHSA-2024:2289

  • tiff SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 4.0.9-44.71.1
  • tiff SLE Module for Package Hub 15 SP5, SLE Module for Package Hub 15 SP4, SLE Module for Basesystem 15 SP5 +9 more 4.0.9-150000.45.32.1

suse advisories SUSE-SU-2023:4371-1SUSE-SU-2023:4370-1

  • libtiff AlmaLinux 9 4.4.0-12.el9
  • libtiff-tools AlmaLinux 9 4.4.0-12.el9

almalinux advisories ALSA-2024:2289

  • libtiff CBL-Mariner 2.0 4.5.1-1

azure linux advisories AZL-27678

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2023-3618 updated cvss 6.5

libtiff: segmentation fault in Fax3Encode in libtiff/tif_fax3.c

  • Red Hat Enterprise Linux 6 libtiff Red Hat Enterprise Linux 7 libtiff, libtiff-tools, compat-libtiff3
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 libtiff, libtiff-tools, compat-libtiff3
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 9) libtiff 4.4.0-12.el9 Red Hat Enterprise Linux CRB (v. 9) libtiff-tools 4.4.0-12.el9
    fixed: vendor fix RHSA-2024:2289

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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.19% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia Libtiff_jll
<4.5.1+0
4.5.1+0

Affected products

  • n/a libtiff
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Fedora Fedora

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

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.