Check Point Advisories

OpenPLC WebServer Remote Code Execution (CVE-2021-31630)

Check Point Reference: CPAI-2021-0518
Date Published: 9 Sep 2021
Severity: High
Last Updated: Sunday 07 April, 2024
Industry Reference:CVE-2021-31630
Protection Provided by:

Security Gateway
R81, R80, R77, R75

Who is Vulnerable? OpenPLC WebServer version 3
Open PLC Webserver v3
Vulnerability Description A remote code execution vulnerability exists in OpenPLC WebServer. Successful exploitation of this vulnerability could allow an authenticated attacker to execute arbitrary code on the affected system.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

  1. In the IPS tab, click Protections and find the OpenPLC WebServer Remote Code Execution (CVE-2021-31630) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Web Server Enforcement Violation.
Attack Information:  OpenPLC WebServer Remote Code Execution (CVE-2021-31630)

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