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Asterisk SIP Channel Driver Invalid SDP Denial of Service (AST-2013-005)



The remote VoIP server is affected by a denial of service vulnerability


According to the version in its SIP banner, the version of Asterisk running on the remote host is potentially affected by a denial of service vulnerability. The application does not properly handle an invalid SDP in a SIP request if such a request defines media descriptions and then defines connection data.


Upgrade to Asterisk / 10.12.3 / 11.5.1 / Certified Asterisk 1.8.15-cert3 / 11.2-cert2, or apply the appropriate patch listed in the Asterisk advisory.