|Check Point Reference:||CPAI-2013-2961|
|Date Published:||29 Sep 2013|
|Last Updated:||31 Mar 2019|
|Protection Provided by:||
|Who is Vulnerable?|
|Vulnerability Description||A denial of service vulnerability exists in Asterisk Open Source, Certified Asterisk and Asterisk with Digiumphones. The vulnerability is due to the SIP channel driver failing to handle an invalid SDP sent in a SIP request that defines media descriptions before connection information. An attacker could exploit this vulnerability by sending a specially crafted SIP request to the vulnerable server.|
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.
This protection's log will contain the following information:
Attack Name: VoIP Enforcement Violation.
Attack Information: Digium Asterisk SIP Invalid SDP Media Descriptions Denial of Service