Check Point Advisories

HTTP Server Parameter Pollution

Check Point Reference: SBP-2009-07
Date Published: 21 Jul 2009
Severity: Critical
Last Updated: Wednesday 12 November, 2014
Source:
Protection Provided by:

Security Gateway
R81, R80, R77, R75, R71, R70
Who is Vulnerable?
Vulnerability Description HTTP Parameter Pollution (HPP) is a hacking technique. HPP attacks allow the attacker to override or add HTTP GET/POST parameters by injecting query string delimiters. This is an input validation vulnerability. Input validation flaws are caused by unsanitized data flows between the front-end and the several back-ends of a web application. A remote attacker could exploit this flaw to create an HPP attack via a malformed HTTP request. Successful exploitation of this vulnerability may allow the attacker to override existing hardcoded HTTP parameters.

Protection Overview

This protection will detect and block HTTP requests attempting 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 / R71 / R70

  1. In the IPS tab, click Protections and find the HTTP Server Parameter Pollution protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Web Server Enforcement Violation.
Attack Information:  HTTP server parameter pollution

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