Check Point Advisories

F5 BIG-IP Buffer Overflow (CVE-2021-22991)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-1087
Date Published:	17 Feb 2022
Severity:	Critical
Last Updated:	Thursday 17 February, 2022
Source:
Industry Reference:	CVE-2021-22991
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	F5 BIG-IP 16.0.x prior to 16.0.1.1 F5 BIG-IP 15.1.x prior to 15.1.2.1 F5 BIG-IP 14.1.x prior to 14.1.4 F5 BIG-IP 13.1.x prior to 13.1.3.6 F5 BIG-IP 12.1.x prior to 12.1.5.3
Vulnerability Description	A buffer overflow vulnerability exists in F5 BIG-IP. Successful exploitation of this vulnerability could result in a denial of service or execution of arbitrary code into 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

In the IPS tab, click Protections and find the F5 BIG-IP Buffer Overflow (CVE-2021-22991) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: F5 BIG-IP Buffer Overflow (CVE-2021-22991)