Check Point Advisories

Squid Cache Poisoning (CVE-2016-4553)

Vulnerability
Protection

Check Point Reference:	CPAI-2016-0484
Date Published:	15 Jun 2016
Severity:	High
Last Updated:	Wednesday 02 April, 2025
Source:	Squid Project
Industry Reference:	CVE-2016-4553
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Squid before 3.5.18 Squid 4.x before 4.0.10
Vulnerability Description	A cache poisoning vulnerability exists in Squid. A successful exploitation of this vulnerability could allow cache poisoning of the target server.

Protection Overview

This protection will detect and block 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 Squid Cache Poisoning (CVE-2016-4553) 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: DNS Enforcement Violation.
Attack Information: Squid Cache Poisoning (CVE-2016-4553)