#VU45851 Input validation error in Ghostscript - CVE-2020-16309

Vulnerability identifier: #VU45851

Vulnerability risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-16309

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Ghostscript
Universal components / Libraries / Libraries used by multiple products

Vendor: Artifex Software, Inc.

Description

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 in gdevlxm.c. A remote attacker can cause a denial of service via a crafted eps file.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Ghostscript: 9.50

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External links
https://bugs.ghostscript.com/show_bug.cgi?id=701827
https://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a6f7464dddc689386668a38b92dfd03cc1b38a10
https://lists.debian.org/debian-lts-announce/2020/08/msg00032.html

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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