Asterisk SIP Channel Driver Invalid SDP Denial of Service (AST-2013-005)

This script is Copyright (C) 2013-2014 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 denial of
service vulnerability.

The application does not properly handle an invalid SDP in a SIP request
if such a request defines media descriptions and then defines connection
data.

See also :

http://www.nessus.org/u?0ab2e5f6
http://downloads.asterisk.org/pub/security/AST-2013-005.html
https://issues.asterisk.org/jira/browse/ASTERISK-22007

Solution :

Upgrade to Asterisk 1.8.23.1 / 10.12.3 / 11.5.1 / Certified Asterisk
1.8.15-cert3 / 11.2-cert2, 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 : 3.7
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Misc.

Nessus Plugin ID: 69559 ()

Bugtraq ID: 62022

CVE ID: CVE-2013-5642