Remote code execution in Ghostscript

1) OS Command Injection

EUVDB-ID: #VU18055

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-3838

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

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

External links

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

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.