#VU14562 Improper input validation in Ghostscript - CVE-2018-15911

Vulnerability identifier: #VU14562

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-15911

CWE-ID: CWE-20

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 execute arbitrary code on the target system.

The vulnerability exists due to the bypass of the -dSAFER option. A remote unauthenticated attacker can submit a specially crafted PostScript file, cause uninitialized memory access in the aesdecode operator and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise. 

Mitigation
Install update from vendor's website.

Vulnerable software versions

Ghostscript: 5.50 - 9.23

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External links
https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=8e9ce5016db968b40e4ec255a3005f2786cce45f

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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.