CVE-2020-15900

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-28 · updated 2026-06-17
Weakness: CWE-191

Description

A memory corruption issue was found in Artifex Ghostscript 9.50 and 9.52. Use of a non-standard PostScript operator can allow overriding of file access controls. The 'rsearch' calculation for the 'post' size resulted in a size that was too large, and could underflow to max uint32_t. This was fixed in commit 5d499272b95a6b890a1397e11d20937de000d31b.

Affected products

Artifex Ghostscript: 9.50, 9.52
Canonical Ubuntu Linux: 20.04
openSUSE Leap: 15.1, 15.2

References

http://git.ghostscript.com/?p=ghostpdl.git%3Ba=log
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00006.html
https://artifex.com/security-advisories/CVE-2020-15900
https://git.ghostscript.com/?p=ghostpdl.git%3Ba=commitdiff%3Bh=5d499272b95a6b890a1397e11d20937de000d31b
https://github.com/ArtifexSoftware/ghostpdl/commit/5d499272b95a6b890a1397e11d20937de000d31b
https://github.com/ArtifexSoftware/ghostpdl/commits/master/psi/zstring.c
https://security.gentoo.org/glsa/202008-20
https://usn.ubuntu.com/4445-1/
http://git.ghostscript.com/?p=ghostpdl.git%3Ba=log
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00006.html

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