Check Point Advisories

HAProxy Integer Overflow (CVE-2021-40346)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-1774
Date Published:	5 Sep 2024
Severity:	High
Last Updated:	Thursday 05 September, 2024
Source:
Industry Reference:	CVE-2021-40346
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	HAProxy 2.0.0 and later, prior to 2.0.25 HAProxy 2.2.0 and later, prior to 2.2.17 HAProxy 2.3.0 and later, prior to 2.3.14 HAProxy 2.4.0 and later, prior to 2.4.4 HAProxy 2.5 Dev 0 HAProxy 2.5 Dev 1 HAProxy 2.5 Dev 2 HAProxy 2.5 Dev 3 HAProxy 2.5 Dev 4 HAProxy 2.5 Dev 5 HAProxy 2.5 Dev 6
Vulnerability Description	An integer overflow vulnerability exists in HAProxy. Successful exploitation of this vulnerability could allow a remote 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

In the IPS tab, click Protections and find the HAProxy Integer Overflow (CVE-2021-40346) 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 Client Enforcement Violation.
Attack Information: HAProxy Integer Overflow (CVE-2021-40346)