Vulnerability identifier: #VU29641

Vulnerability risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2020-12497

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PC Worx
Client/Desktop applications / Other client software
PC Worx Express
Client/Desktop applications / Other client software

Vendor: Phoenix Contact GmbH

Description

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

The vulnerability exists due to a boundary error within the parsing of XML files. A remote unauthenticated attacker can use a specially crafted file, trigger stack-based buffer overflow and execute arbitrary code on the target system.

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

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

PC Worx: 1.87

PC Worx Express: 1.87

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External links
http://cert.vde.com/de-de/advisories/vde-2020-023
http://www.zerodayinitiative.com/advisories/ZDI-21-398/

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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. However, proof of concept for this vulnerability is available.