#VU16020 Security restrictions bypass in Ghostscript - CVE-2018-19409

Vulnerability identifier: #VU16020

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-19409

CWE-ID: CWE-264

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 local attacker to bypass security restrictions on the target system.

The vulnerability exists due to improper checks of the LockSafetyParams device parameter if another device is used as the top device. A local attacker can make a .setdevice call and bypass security restrictions If another device, such as the pdf14 compositor, is the top device on the system.

Mitigation
Update to version 9.26.

Vulnerable software versions

Ghostscript: 9.00 - 9.25

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External links
https://git.ghostscript.com/?p=ghostpdl.git&a=commit&h=661e8d8fb8248c38d67958beda32f...

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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.