|Check Point Reference:||CPAI-2009-413|
|Date Published:||21 Feb 2010|
|Last Updated:||22 May 2017|
|Protection Provided by:||
|Who is Vulnerable?|
|Vulnerability Description||Asterisk is an open source software implementation of a telephone private branch exchange. Like any PBX, it allows a number of attached telephones to make calls to one another, and to connect to other telephone services including the public switched telephone network. Asterisk supports a wide range of Voice over IP protocols, including SIP, IAX2, MGCP, and H.323.A denial of service vulnerability has been reported in Asterisk SIP Channel Driver. The vulnerability is due to insufficient input validation when processing maliciously crafted SIP requests.Remote authenticated attackers could exploit this vulnerability by crafting SIP requests. Successful exploitation could result in a denial of service condition.|
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 sscanf Multiple Denial of Service