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Vulnerability record · CVE-2018-18557 · published 22 October 2018

CVE-2018-18557: Libtiff out-of-bounds write vulnerability

Libtiff · Libtiff

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.

8.8 CVSS 3.0 High EPSS 15% · top 3.4% CWE-787 · Out-of-bounds write
8.8CVSS 3.0 base score, v2 6.8
15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
20References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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/38 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00019.html Mailing ListThird 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-4349 Third Party Advisory
https://www.exploit-db.com/exploits/45694/ ExploitThird Party AdvisoryVDB 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/38 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00019.html Mailing ListThird 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-4349 Third Party Advisory
https://www.exploit-db.com/exploits/45694/ ExploitThird Party AdvisoryVDB Entry

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Source: NIST National Vulnerability Database (record CVE-2018-18557), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.