Check Point Advisories

CODESYS Null Pointer Dereference (CVE-2021-34586)

Check Point Reference: CPAI-2021-1526
Date Published: 2 Jan 2023
Severity: High
Last Updated: Monday 02 January, 2023
Source:
Industry Reference:CVE-2021-34586
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? CODESYS up to v1.1.9.22 (excluding)
Vulnerability Description A NULL pointer dereference vulnerability exists in the CODESYS. Successful exploitation could result in a denial of service condition on the affected service.

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 CODESYS Null Pointer Dereference (CVE-2021-34586) 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:  CODESYS Null Pointer Dereference (CVE-2021-34586)

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