Asterisk ConfBridge 'dialplan' Privilege Escalation (AST-2014-017)

This script is Copyright (C) 2014-2016 Tenable Network Security, Inc.


Synopsis :

A telephony application running on the remote host is affected by a
privilege escalation vulnerability.

Description :

According to the version in its SIP banner, the version of Asterisk
running on the remote host is potentially affected by a privilege
escalation vulnerability in the ConfBridge 'dialplan' function that is
triggered when executed from an external protocol. This could allow a
remote, authenticated attacker to escalate privileges. Additionally,
the 'ConfbridgeStartRecord' AMI action could be leveraged to execute
arbitrary system commands.

Note that Nessus has not tested for these issues but has instead
relied only on the application's self-reported version number.

See also :

http://downloads.asterisk.org/pub/security/AST-2014-017.html
https://issues.asterisk.org/jira/browse/ASTERISK-24490

Solution :

Upgrade to Asterisk 11.14.1 / 12.7.1 / 13.0.1 / 11.6-cert8 or apply
the appropriate patch listed in the Asterisk advisory.

Risk factor :

High / CVSS Base Score : 8.5
(CVSS2#AV:N/AC:M/Au:S/C:C/I:C/A:C)
CVSS Temporal Score : 6.3
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Misc.

Nessus Plugin ID: 79441 ()

Bugtraq ID: 71228

CVE ID: CVE-2014-8417

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