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Asterisk SIP Channel Driver Denial of Service (AST-2011-007)



The remote VoIP server is vulnerable to a denial of service attack.


The version of Asterisk running on the remote host is potentially affected by a denial of service vulnerability. If a remote attacker initiates a SIP call and the recipient picks up, the remote user can reply with a malformed Contact header that will cause Asterisk to crash.


Upgrade to Asterisk or later.