This script is Copyright (C) 2014-2016 Tenable Network Security, Inc.
A telephony application running on the remote host is affected by
According to the version in its SIP banner, the version of Asterisk
running on the remote host is potentially affected by the following
vulnerabilities in the PJSIP channel driver :
- A security bypass vulnerability exists due to a flaw in
the 'res_pjsip_acl' module which may allow a remote
attacker to bypass ACL rules for rejecting SIP requests
from certain hosts. (CVE-2014-8413)
- A denial of service vulnerability exists due to a race
condition in the 'chan_pjsip' channel driver which could
allow a remote attacker to crash the application.
- A denial of service vulnerability exists due to a flaw
in the 'res_pjsip_refer' module that is triggered when
handling an INVITE with 'Replaces' message that has
been sent after a session has already been established.
By using a specially crafted request, a remote attacker
could exploit this to crash the application.
Note that Nessus has not tested for these issues but has instead
relied only on the application's self-reported version number.
See also :
Upgrade to Asterisk 12.7.1 / 13.0.1 or apply the appropriate patch or
workaround listed in the Asterisk advisories.
Risk factor :
Medium / CVSS Base Score : 4.3
CVSS Temporal Score : 3.7
Public Exploit Available : true