What’s Vulnerable › Vulnerabilities

CVE-2018-18557

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 15.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-10-22 · updated 2026-06-17
• Weakness: CWE-787

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.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 18.10
• Debian Linux: 8.0, 9.0
• libtiff: 4.0.9

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/38
• https://lists.debian.org/debian-lts-announce/2018/10/msg00019.html
• https://security.gentoo.org/glsa/201904-15
• https://usn.ubuntu.com/3864-1/
• https://usn.ubuntu.com/3906-2/
• https://www.debian.org/security/2018/dsa-4349
• https://www.exploit-db.com/exploits/45694/
• https://access.redhat.com/errata/RHSA-2019:2053
• https://github.com/Hack-Me/Pocs_for_Multi_Versions/tree/main/CVE-2018-18557

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