#VU18055 OS Command Injection in Ghostscript - CVE-2019-3838

Vulnerability identifier: #VU18055

Vulnerability 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-2019-3838

CWE-ID: CWE-78

Exploitation vector: Network

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 when processing PostScript files with Ghostscript. A remote attacker can create a specially crafted PDF file, trick the victim to open it and execute arbitrary commands on the affected system.

Mitigation
Install updates from vendor's repository.

Vulnerable software versions

Ghostscript: 5.50 - 9.26

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External links
https://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a82601e8f95a
https://bugzilla.redhat.com/show_bug.cgi?id=1677588

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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.