Check Point Advisories

RealNetworks Helix Server RTSP SET_PARAMETERS Request Denial of Service (CVE-2009-2533)

Vulnerability
Protection

Check Point Reference:	CPAI-2009-407
Date Published:	4 Feb 2010
Severity:	High
Last Updated:	Monday 22 June, 2020
Source:
Industry Reference:	CVE-2009-2533
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	Helix Server is a multi media server that is designed to serve streaming and static audio and video content. Helix project, Helix Server being part of it, is intended as a largely free software/open source digital media framework that runs on numerous operating systems and processors (including mobile phones). There exists a denial of service vulnerability in RealNetworks Helix Server. The vulnerability is due to a logic error in the way RealNetworks Helix Server and Helix Mobile Server handle RTSP requests. Remote unauthenticated attackers can exploit this vulnerability by sending a crafted RTSP SET_PARAMETER request to the affected server. As a result of processing the malicious command, a denial of service condition will be created on the target system, the affected service may become unresponsive until it is restarted.

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 RealNetworks Helix Server RTSP SET_PARAMETERS Request 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: RTSP Enforcement Violation.
Attack Information: RealNetworks Helix Server RTSP SET_PARAMETERS request denial of service