Asterisk HTTP Content-Length Header DoS (AST-2013-002)

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 related to HTTP POST requests with very large
Content-Length header values.

See also :

http://downloads.asterisk.org/pub/security/AST-2013-002.html
https://issues.asterisk.org/jira/browse/ASTERISK-20967

Solution :

Upgrade to Asterisk 1.8.20.2 / 10.12.2 / 11.2.2 / Certified Asterisk
1.8.15-cert2, or apply the 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: 65897 ()

Bugtraq ID: 58756

CVE ID: CVE-2013-2686