Division by zero in Ghostscript - CVE-2020-21710

Vulnerability identifier: #VU80810

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-21710

CWE-ID: CWE-369

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to crash the application.

The vulnerability exists due to a divide by zero error within the eps_print_page() function in gdevepsn.c. A remote attacker can trick the victim to open a specially crafted PDF file and crash the application.

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

Install updates from vendor's website.

Ghostscript - update to 9.51
ghostscript (Ubuntu package) - addressed in versions Ubuntu Pro, 9.50~dfsg-5ubuntu4.10
libgs9 (Ubuntu package) - addressed in versions Ubuntu Pro, 9.50~dfsg-5ubuntu4.10
ghostscript - addressed in versions 8.70-24.32, 9.56.1-7
ghostscript (Red Hat package) - update to 9.27-12.el8

• https://bugs.ghostscript.com/show_bug.cgi?id=701843
• https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=4e713293de84b689c4ab358f3e110ea54aa81925

• Multiple vulnerabilities in Ghostscript
• Ubuntu update for ghostscript
• Amazon Linux AMI update for ghostscript
• Red Hat Enterprise Linux 8 update for ghostscript
• Amazon Linux AMI update for ghostscript