Check Point Advisories

Digium Asterisk Skinny Channel NULL-Pointer Dereference (CVE-2012-2948)

Check Point Reference: CPAI-2012-312
Date Published: 27 Aug 2012
Severity: High
Last Updated: Thursday 21 November, 2024
Source: CVE-2012-2948
Protection Provided by:

Security Gateway
R75
Who is Vulnerable? Digium Asterisk Open Source 1.8 prior to 1.8.12.1
Digium Asterisk Open Source 10 prior to 10.4.1
Vulnerability Description A denial of service vulnerability has been reported in Digium Asterisk.
Vulnerability DetailsThe vulnerability is due to a NULL-pointer dereference error while handling a closed client connection in the SCCP (Skinny) channel driver. A remote attacker can exploit this vulnerability by closing a connection to the Asterisk server in certain call states. The attacker will have to use a valid SCCP ID to close the connection. Successful exploitation would cause the server 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 product to the latest update. For information on how to update , go to SBP-2006-05, Protection tab and select the version of your choice.

Security Gateway R75 / R71 / R70

  1. In the IPS tab, click Protections and find the Digium Asterisk Skinny Channel NULL-Pointer Dereference protection using the Search tool and Edit the protection's settings.
  2. Install policy on all modules.

SmartView Tracker will log the following entries:
Attack Name: VoIP Enforcement Violation
Attack Information: Digium Asterisk Skinny Channel NULL-Pointer Dereference

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