What’s Vulnerable › Vulnerabilities

CVE-2018-19477

• Severity: high (CVSS 7.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-11-23 · updated 2026-06-17
• Weakness: CWE-704

Description

psi/zfjbig2.c in Artifex Ghostscript before 9.26 allows remote attackers to bypass intended access restrictions because of a JBIG2Decode type confusion.

Affected products

• Artifex Ghostscript: before 9.26 — fixed in 9.26
• Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 18.10
• Debian Linux: 8.0, 9.0
• RedHat Enterprise Linux Desktop: 7.0
• RedHat Enterprise Linux Server: 7.0, 7.6
• RedHat Enterprise Linux Server Aus: 7.6
• RedHat Enterprise Linux Server Eus: 7.6
• RedHat Enterprise Linux Server Tus: 7.6
• RedHat Enterprise Linux Workstation: 7.0
• Red Hat OpenShift Container Platform 4.18: 3.11

How to fix

Upgrade to a fixed version: Artifex Ghostscript 9.26. Check the vendor advisory for mitigations.

References

• http://git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=ef252e7dc214bcbd9a2539216aab9202848602bb
• http://git.ghostscript.com/?p=ghostpdl.git%3Bh=606a22e77e7f081781e99e44644cd0119f559e03
• http://www.securityfocus.com/bid/106154
• https://access.redhat.com/errata/RHBA-2019:0327
• https://access.redhat.com/errata/RHSA-2019:0229
• https://bugs.ghostscript.com/show_bug.cgi?id=700168
• https://lists.debian.org/debian-lts-announce/2018/11/msg00036.html
• https://semmle.com/news/semmle-discovers-severe-vulnerability-ghostscript-postscript-pdf
• https://usn.ubuntu.com/3831-1/
• https://www.debian.org/security/2018/dsa-4346
• https://www.ghostscript.com/doc/9.26/History9.htm#Version9.26
• http://git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=ef252e7dc214bcbd9a2539216aab9202848602bb

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