Check Point Advisories

Apache Log4j Denial Of Service (CVE-2021-45105)

Check Point Reference: CPAI-2021-0955
Date Published: 21 Dec 2021
Severity: Critical
Last Updated: Tuesday 21 December, 2021
Industry Reference:CVE-2021-45105
Protection Provided by:

Security Gateway
R81, R80, R77, R75

Who is Vulnerable? Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3)
Vulnerability Description A denial of service vulnerability exists in Apache Log4. Successful exploitation of this vulnerability would allow a remote attacker to create a denial of service condition 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 Apache Log4j Denial Of Service (CVE-2021-45105) 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:  Apache Log4j Denial Of Service (CVE-2021-45105)

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