Asterisk Invalid INVITE / REGISTER SIP Request Username Enumeration (AST-2011-011)

This script is Copyright (C) 2011-2014 Tenable Network Security, Inc.

Synopsis :

The version of Asterisk installed on the remote host may be affected
by an information disclosure vulnerability.

Description :

According 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.

See also :

Solution :

Update to Asterisk / / / C.3.7.3 or

Risk factor :

Medium / CVSS Base Score : 5.0
CVSS Temporal Score : 4.8
Public Exploit Available : true

Family: Misc.

Nessus Plugin ID: 56921 ()

Bugtraq ID: 47676

CVE ID: CVE-2011-2536