Check Point Advisories

Apache HTTPD mod_proxy_ajp Denial Of Service (CVE-2011-3348)

Vulnerability
Protection

Check Point Reference:	CPAI-2014-2186
Date Published:	12 Nov 2014
Severity:	High
Last Updated:	Monday 01 December, 2014
Source:	Apache Foundation
Industry Reference:	CVE-2011-3348
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Apache Software Foundation HTTP Server 2.2.12 - 2.2.20
Vulnerability Description	A denial of service vulnerability has been identified in Apache httpd. The vulnerability is due to an error while processing crafted HTTP requests by mod_proxy_ajp when used with mod_proxy_balancer. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted HTTP requests to the vulnerable 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 Apache HTTPD mod_proxy_ajp Denial Of Service 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: HTTP Protocol Inspection.
Attack Information: Apache HTTPD mod_proxy_ajp Denial Of Service