Check Point Advisories

Monkey HTTPD Header Parsing Denial of Service (CVE-2013-3843)

Vulnerability
Protection

Check Point Reference:	CPAI-2013-2168
Date Published:	1 Jul 2013
Severity:	High
Last Updated:	Wednesday 25 December, 2013
Source:
Industry Reference:	CVE-2013-3843
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	A denial of service vulnerability has been reported in Monkey HTTPD Server. The vulnerability is due to improper bounds checking while parsing headers. A remote attacker can exploit this vulnerability by sending a malicious request to the target server. Successful exploitation of this vulnerability allows remote attackers to create a denial of service condition or inject and execute arbitrary code on the vulnerable system.

Protection Overview

This protection will detect and block specially crafted HTTP requests sent to the server.

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 Monkey HTTPD Header Parsing 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: Web Server Enforcement Violation.
Attack Information: Monkey HTTPD Header parsing denial of service