Check Point Advisories

Squid Proxy Gopher Response Processing Denial of Service (CVE-2011-3205)

Vulnerability
Protection

Check Point Reference:	CPAI-2012-172
Date Published:	14 May 2012
Severity:	High
Last Updated:	Friday 22 November, 2024
Source:	CVE-2011-3205
Protection Provided by:	Security Gateway R75
Who is Vulnerable?	Squid Project Squid 3.0 prior to 3.0.STABLE26 Squid Project Squid 3.1 prior to 3.1.15 Squid Project Squid 3.2 prior to 3.2.0.11
Vulnerability Description	A denial of service vulnerability has been reported in Squid proxy server.
Vulnerability Details	The vulnerability is due to a boundary error while parsing malformed Gopher responses. A remote attacker could exploit this vulnerability by setting up a Gopher server to send malicious responses. Successful exploitation could cause the server to crash, resulting in a denial of service condition.

Protection Overview

This protection will detect and block the transferring of a malicious response from a Gopher server.

In order for the protection to be activated, update your product to the latest update. For information on how to update , go to SBP-2006-05, Protection tab and select the version of your choice.

Security Gateway R75 / R71 / R70

In the IPS tab, click Protections and find the Squid Proxy Gopher Response Processing Denial of Service protection using the Search tool and Edit the protection's settings.
Install policy on all modules.

SmartView Tracker will log the following entries:
Attack Name: Proxy Server Enforcement Violation
Attack Information: Squid Proxy Gopher Response Processing Denial of Service