Multiple vulnerabilities in Ghostscript

Published: 2023-09-14

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-21710 CVE-2020-21890
CWE-ID	CWE-369 CWE-787
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Ghostscript Universal components / Libraries / Libraries used by multiple products
Vendor	Artifex Software, Inc.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Division by zero

EUVDB-ID: #VU80810

Risk: Low

CVSSv4.0: 1.2 [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/E:U/U:Clear]

CVE-ID: CVE-2020-21710

CWE-ID: CWE-369 - Divide By Zero

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Ghostscript: 9.10 - 9.50

CPE2.3

External links

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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Out-of-bounds write

EUVDB-ID: #VU80809

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-21890

CWE-ID: CWE-787 - Out-of-bounds write