Vulnerability identifier: #VU45853

Vulnerability risk: Medium

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-17538

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 GetNumSameData() and GetNumWrongData() function. A remote attacker can cause a denial of service via a crafted PDF file.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Ghostscript: 9.50

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External links
http://bugs.ghostscript.com/show_bug.cgi?id=701792
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=9f39ed4a92578a020ae10459643e1fe72573d134
http://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.