Remote code execution in Artifex Ghostscript



Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-15900
CWE-ID CWE-119
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ghostscript
Universal components / Libraries / Libraries used by multiple products

Vendor Artifex Software, Inc.

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Buffer overflow

EUVDB-ID: #VU33701

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-2020-15900

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when use of a non-standard PostScript operator can allow overriding of file access controls. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Ghostscript: 9.50 - 9.52

CPE2.3 External links

https://git.ghostscript.com/?p=ghostpdl.git;a=log
https://lists.opensuse.org/opensuse-security-announce/2020-08/msg00004.html
https://artifex.com/security-advisories/CVE-2020-15900
https://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=5d499272b95a6b890a1397e11d20937de000d31b
https://github.com/ArtifexSoftware/ghostpdl/commit/5d499272b95a6b890a1397e11d20937de000d31b
https://github.com/ArtifexSoftware/ghostpdl/commits/master/psi/zstring.c


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.



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