Remote code execution in 3S-Smart Software Solutions GmbH CODESYS Runtime

1) Insufficient verification of data authenticity

EUVDB-ID: #VU27676

Risk: High

CVSSv3.1: 9.1 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-6081

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

Exploit availability: No

Description

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

The vulnerability exists due to insufficient verification of data authenticity issue in the "PLC_Task" functionality. A remote authenticated attacker can send a specially crafted network request and execute arbitrary code on the target system.

Mitigation

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

Vulnerable software versions

CODESYS Control Runtime System Toolkit: 3.5.14.30

External links

http://talosintelligence.com/vulnerability_reports/TALOS-2020-1003

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.