CVE-2020-15900 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://git.ghostscript.com/?p=ghostpdl.git;a=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;a=commitdiff;h=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/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8