Asterisk Remote Crash Vulnerability in IAX2 Channel Driver (AST-2012-007)

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. This issue
could be exploited when a call is put on hold and the entity placing
the call on hold contains the configuration item 'mohinterpret' set to
the value 'passthrough'. An additional requirement is that the call
is placed on hold with no 'music-on-hold' class name selected.

See also :

https://issues.asterisk.org/jira/browse/ASTERISK-19597
http://downloads.asterisk.org/pub/security/AST-2012-007.html

Solution :

Upgrade to Asterisk 1.8.12.1 / 10.4.1 / 1.8.11-cert-2 or apply the
patches listed in the Asterisk advisory.

Risk factor :

Low / CVSS Base Score : 2.6
(CVSS2#AV:N/AC:H/Au:N/C:N/I:N/A:P)
CVSS Temporal Score : 2.1
(CVSS2#E:F/RL:OF/RC:C)
Public Exploit Available : true

Family: Misc.

Nessus Plugin ID: 59503 ()

Bugtraq ID: 53722

CVE ID: CVE-2012-2947