Asterisk PJSIP Channel Driver Options DoS (AST-2014-003)
Medium Nessus Plugin ID 73021
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 denial of service vulnerability.
A flaw exists in the PJSIP channel driver when the 'quality_frequency' configuration is enabled on an AOR when the SIP server's challenges for authentication challenges of the 'OPTIONS' request. A remote attacker could use a specially crafted request to crash the program.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
SolutionUpgrade to Asterisk 12.1.1 or apply the appropriate patch listed in the Asterisk advisory.