Asterisk ConfBridge State Transitions DoS (AST-2014-014)

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


Synopsis :

A telephony application running on the remote host is affected by a
denial of service vulnerability.

Description :

According 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. This flaw exists due to improper handling of
state transitions which could allow a remote attacker to crash the
application.

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

See also :

http://downloads.asterisk.org/pub/security/AST-2014-014.html
https://issues.asterisk.org/jira/browse/ASTERISK-24440

Solution :

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

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P)
CVSS Temporal Score : 4.3
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : true

Family: Misc.

Nessus Plugin ID: 79440 ()

Bugtraq ID: 71222

CVE ID: CVE-2014-8414

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