#VU15748 Security restrictions bypass in Ghostscript and GhostXPS - CVE-2018-18073

Vulnerability identifier: #VU15748

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-18073

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Ghostscript
Universal components / Libraries / Libraries used by multiple products
GhostXPS
Universal components / Libraries / Libraries used by multiple products

Vendor: Artifex Software, Inc.

Description
The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists due to exposure of system operators in the saved execution stack in an error object. A remote attacker can bypass a sandbox protection mechanism to conduct further attacks.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Ghostscript: 5.50 - 9.25

GhostXPS: 9.21

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External links
https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=34cc326eb2c5695833361887fe0b32e8d987741c

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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.