Check Point Advisories

Squid Proxy DNS Response Spoofing (CVE-2005-1519; CVE-2007-3898)

Vulnerability
Protection

Check Point Reference:	CPAI-2014-1167
Date Published:	23 Mar 2014
Severity:	High
Last Updated:	Wednesday 16 December, 2015
Source:	MS07-062 Microsoft
Industry Reference:	CVE-2005-1519 CVE-2007-3898
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Squid Project Squid Web Proxy Cache 2.5.STABLE9 and prior versions Microsoft Windows 2000 Server Microsoft Windows Server 2003 Microsoft Windows Server 2003 x64 Edition Microsoft Windows Server 2003 for Itanium-based Systems
Vulnerability Description	There exists a vulnerability in Squid Web Proxy Cache in the processing of DNS lookups. The flaw is caused by predictable transaction identifiers in DNS requests generated by Squid. A remote attacker may leverage this vulnerability to use spoofed DNS responses to poison the DNS cache on the target system.

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 Proxy DNS Response Spoofing 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 Proxy DNS Response Spoofing