CVE-2018-18557

Name: CVE-2018-18557
Creator: NVD / NIST
Published: 2018-10-22T16:29:00.267+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 14.96%

Last modified Jun 17, 2026

CVE-2018-18557 is a vulnerability of currently unknown severity. 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 (with JBIG enabled) decodes arbitrarily-sized JBIG into a buffer, ignoring the buffer size, which leads to a tif_jbig.c JBIGDecode out-of-bounds write.. EPSS estimates a 14.96% chance of exploitation in the next 30 days.

Description

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 (with JBIG enabled) decodes arbitrarily-sized JBIG into a buffer, ignoring the buffer size, which leads to a tif_jbig.c JBIGDecode out-of-bounds write.

Metrics

EPSS Probability

14.96%

96.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Libtiff	Libtiff	4.0.9
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	18.10

References

https://access.redhat.com/errata/RHSA-2019:2053
https://github.com/Hack-Me/Pocs_for_Multi_Versions/tree/main/CVE-2018-18557
https://gitlab.com/libtiff/libtiff/commit/681748ec2f5ce88da5f9fa6831e1653e46af8a66
https://gitlab.com/libtiff/libtiff/merge_requests/38Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00019.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201904-15
https://usn.ubuntu.com/3864-1/Third Party Advisory
https://usn.ubuntu.com/3906-2/
https://www.debian.org/security/2018/dsa-4349Third Party Advisory
https://www.exploit-db.com/exploits/45694/Exploit, Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2019:2053
https://github.com/Hack-Me/Pocs_for_Multi_Versions/tree/main/CVE-2018-18557
https://gitlab.com/libtiff/libtiff/commit/681748ec2f5ce88da5f9fa6831e1653e46af8a66
https://gitlab.com/libtiff/libtiff/merge_requests/38Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00019.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201904-15
https://usn.ubuntu.com/3864-1/Third Party Advisory
https://usn.ubuntu.com/3906-2/
https://www.debian.org/security/2018/dsa-4349Third Party Advisory
https://www.exploit-db.com/exploits/45694/Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Oct 22, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-18557?

How severe is CVE-2018-18557?

Severity scoring for CVE-2018-18557 is pending analysis. The EPSS model estimates a 14.96% probability of exploitation in the next 30 days.

How do I fix CVE-2018-18557?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-18557?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST