Check Point Advisories

Apache HTTP Server Server-Side Request Forgery (CVE-2021-40438)

Check Point Reference: CPAI-2021-0772
Date Published: 18 Oct 2021
Severity: Critical
Last Updated: Monday 31 July, 2023
Industry Reference:CVE-2021-40438
Protection Provided by:

Security Gateway
R81, R80, R77, R75

Who is Vulnerable? Apache HTTP Server 2.4.48 and earlier
Vulnerability Description A server-side request forgery vulnerability exists in Apache HTTP Server. Successful exploitation of this vulnerability could allow an attacker to access internal resources.

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 HTTP Server Server-Side Request Forgery (CVE-2021-40438) 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 HTTP Server Server-Side Request Forgery (CVE-2021-40438)

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