Check Point Advisories

Squid Squoison Host Header Cache Poisoning (CVE-2016-4553)

Vulnerability
Protection

Check Point Reference:	CPAI-2016-0484
Date Published:	15 Jun 2016
Severity:	Medium
Last Updated:	Tuesday 05 July, 2016
Source:	Squid Project
Industry Reference:	CVE-2016-4553
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Squid Project Squid 3.5.12
Vulnerability Description	A cache poisoning vulnerability exists in Squid proxy when configured as a transparent proxy. The flaw is caused by improper inspection of the Host header against the URI in the HTTP request line. An attacker can exploit this flaw by sending a crafted request to some website through the proxy 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 R80 / R77 / R75

In the IPS tab, click Protections and find the Squid Squoison Host Header Cache Poisoning 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 Squoison Host Header Cache Poisoning