Asterisk milliwatt_generate Function Internal Data Sample Packet Parsing Remote DoS (AST-2012-002)

This script is Copyright (C) 2012-2014 Tenable Network Security, Inc.


Synopsis :

The version of Asterisk installed on the remote host may be 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 vulnerability
that could allow a remote attacker to crash the server. The
vulnerability can be triggered by sending large audio packets (if the
internal_timing option is off), or by negotiating a media format with
a sampling rate greater than 32 kHz. Both attacks require that the
dialplan use the Milliwatt application with the 'o' option.

See also :

http://downloads.asterisk.org/pub/security/AST-2012-002.html

Solution :

Upgrade to Asterisk 1.4.44 / 1.6.2.23 / 1.8.10.1 / 10.2.1 or apply
the patches listed in the Asterisk advisory.

Risk factor :

Medium / CVSS Base Score : 4.3
(CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P)
CVSS Temporal Score : 3.2
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Misc.

Nessus Plugin ID: 58432 ()

Bugtraq ID: 52523

CVE ID: CVE-2012-1183