Asterisk Invalid INVITE / REGISTER SIP Request Username Enumeration (AST-2011-011)
Medium Nessus Plugin ID 56921
SynopsisA telephony application running on the remote host is affected by an information disclosure vulnerability.
DescriptionAccording to the version in its SIP banner, the version of Asterisk running on the remote host allows a remote attacker to enumerate valid users by sending malformed SIP INVITE and REGISTER requests.
SolutionUpdate to Asterisk 18.104.22.168 / 22.214.171.124.2 / 126.96.36.199 / C.3.7.3 or later.