Check Point Advisories

Digium Asterisk SIP Channel Driver Denial Of Service - High Confidence (CVE-2011-4063)

Check Point Reference: CPAI-2013-1624
Date Published: 18 Mar 2013
Severity: High
Last Updated: Monday 18 March, 2013
Source:
Industry Reference:CVE-2011-4063
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description A denial of service vulnerability has been reported in Digium Asterisk. The vulnerability is due to an error in Asterisk's SIP channel driver while handling malformed REGISTER requests. A remote attacker may exploit this vulnerability by sending a specially crafted REGISTER request to an affected Asterisk server. Successful exploitation could cause the application to crash, resulting in a denial of service condition.

Protection Overview

This protection will detect and block the transferring of a malicious SIP request.

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

  1. In the IPS tab, click Protections and find the Digium Asterisk SIP Channel Driver Denial Of Service - High Confidence 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:  VoIP Enforcement Violation.
Attack Information:  Digium Asterisk SIP channel driver denial of service - high confidence

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