Asterisk Remote Crash Vulnerability in SIP Channel Driver (AST-2012-006)
Low Nessus Plugin ID 58906
SynopsisA telephony application running on the remote host is affected by a denial of service vulnerability.
DescriptionAccording to the version in its SIP banner, the version of Asterisk running on the remote host is potentially affected by a vulnerability that could allow a remote attacker to crash the server. This issue could be exploited by sending an UPDATE over a SIP channel after the channel dialog has been destroyed, but before the SIP dialog associated with the call has been destroyed.
Only servers that have 'trustrpid' set to 'True' are affected.
SolutionUpgrade to Asterisk 188.8.131.52 / 10.3.1 / C.3.7.4 or apply the patches listed in the Asterisk advisory. Alternatively, set 'trustrpid' to 'False'.