Check Point Advisories

lighttpd Connection Header Parsing Denial of Service (CVE-2012-5533)

Vulnerability
Protection

Check Point Reference:	CPAI-2012-1287
Date Published:	16 Dec 2012
Severity:	High
Last Updated:	Sunday 16 December, 2012
Source:
Industry Reference:	CVE-2012-5533
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	A denial-of-service vulnerability has been reported in lighttpd. The vulnerability is due to insufficient validation of certain values. A remote attacker can exploit this vulnerability by sending a specially crafted Connection request to the vulnerable server. Successful exploitation will cause the application to crash, resulting in a denial of service condition.

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 lighttpd Connection 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: lighttpd connection header parsing denial of service