Check Point Advisories

Apache Tomcat NIO Connector Denial of Service (CVE-2012-4534)

Vulnerability
Protection

Check Point Reference:	CPAI-2013-011
Date Published:	14 Jan 2013
Severity:	High
Last Updated:	Tuesday 30 April, 2013
Source:
Industry Reference:	CVE-2012-4534
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	A denial of service vulnerability has been reported in Apache Tomcat. The vulnerability is due to an infinite loop in NIO Connector when a client breaks the connection in the middle of reading the response for a request to a big file. An unauthenticated, remote attacker can exploit this vulnerability by sending HTTP requests for a large file and disconnecting from the server while reading the file. Successful exploitation could result in a denial of service condition.

Protection Overview

This protection will detect and block malicious HTTP requests.

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 Tomcat NIO Connector 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: Apache Server Protection Violation.
Attack Information: Apache Tomcat NIO Connector denial of service