Check Point Advisories

Digium Asterisk File Descriptor Invalid Headers Syntax Denial of Service (CVE-2014-2287)

Vulnerability
Protection

Check Point Reference:	CPAI-2014-1585
Date Published:	13 Apr 2014
Severity:	Critical
Last Updated:	Monday 06 October, 2014
Source:	Digium AST-2014-002
Industry Reference:	CVE-2014-2287
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Digium Asterisk Open Source 1.8.x prior to 1.8.26.1 Digium Asterisk Open Source 11.x prior to 11.8.1 Digium Asterisk Open Source 12.x prior to 12.1.1 Digium Certified Asterisk 1.8.15 prior to 1.8.15-cert5 Digium Certified Asterisk 11.6 prior to 11.6-cert2
Vulnerability Description	A denial of service vulnerability has been reported in Digium Asterisk. The vulnerability is due to file descriptor exhaustion from a large number of invalid SIP INVITE requests. A remote attacker can exploit this vulnerability to cause 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 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 Digium Asterisk File Descriptor Invalid Headers Syntax 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: VoIP Enforcement Violation.
Attack Information: Digium Asterisk File Descriptor Invalid Headers Syntax Denial of Service