Input validation error in Ghostscript - CVE-2020-16295

Vulnerability identifier: #VU45837

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-16295

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service via a crafted PDF file.

Ghostscript
Gentoo Linux
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Ubuntu
ghostscript (Debian package)
ghostscript (Alpine package)
ghostscript (Ubuntu package)
libgs9 (Ubuntu package)
ghostscript (Red Hat package)

Install update from vendor's website.

Ghostscript - update to 9.51
ghostscript (Debian package) - update to 9.27~dfsg-2+deb10u4
ghostscript (Alpine package) - update to 9.53.1-r0
ghostscript (Ubuntu package) - addressed in versions 9.26~dfsg+0-0ubuntu0.16.04.13, 9.26~dfsg+0-0ubuntu0.18.04.13, 9.50~dfsg-5ubuntu4.2
libgs9 (Ubuntu package) - addressed in versions 9.26~dfsg+0-0ubuntu0.16.04.13, 9.26~dfsg+0-0ubuntu0.18.04.13, 9.50~dfsg-5ubuntu4.2
ghostscript (Red Hat package) - update to 9.27-1.el8

• http://git.ghostscript.com/?p=ghostpdl.git;h=2c2dc335c212750e0fb8ae157063bc06cafa8d3e
• https://bugs.ghostscript.com/show_bug.cgi?id=701796
• https://lists.debian.org/debian-lts-announce/2020/08/msg00032.html

• Multiple vulnerabilities in Ghostscript
• Debian update for ghostscript
• Gentoo update for GPL Ghostscript
• Input validation error in ghostscript (Alpine package)
• Red Hat Enterprise Linux 8 update for ghostscript
• Ubuntu update for ghostscript