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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Auxiliary
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  include Msf::Exploit::Remote::HttpClient
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  prepend Msf::Exploit::Remote::AutoCheck
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'          => 'Belkin Wemo-Enabled Crock-Pot Remote Control',
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      'Description'   => %q{
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        This module acts as a simple remote control for Belkin Wemo-enabled
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        Crock-Pots by implementing a subset of the functionality provided by the
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        Wemo App.
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        No vulnerabilities are exploited by this Metasploit module in any way.
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      },
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      'Author'        => 'wvu',
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      'References'    => [
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        ['URL', 'https://www.crock-pot.com/wemo-landing-page.html'],
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        ['URL', 'https://www.belkin.com/us/support-article?articleNum=101177'],
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        ['URL', 'http://www.wemo.com/']
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      ],
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      'License'       => MSF_LICENSE,
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      'Actions'       => [
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        ['Cook', 'Description' => 'Cook stuff'],
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        ['Stop', 'Description' => 'Stop cooking']
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      ],
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      'DefaultAction' => 'Cook',
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      'Notes'         => {
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        'Stability'   => [CRASH_SAFE],
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        'SideEffects' => [PHYSICAL_EFFECTS]
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      }
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    ))
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    register_options([
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      Opt::RPORT(49152),
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      OptEnum.new('TEMP', [true, 'Temperature', 'Off', modes.keys]),
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      OptInt.new('TIME',  [true, 'Cook time in minutes', 0])
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    ])
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    register_advanced_options([
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      OptBool.new('DefangedMode', [true, 'Run in defanged mode', true])
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    ])
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  end
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  def check
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    res = send_request_cgi(
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      'method' => 'GET',
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      'uri'    => '/setup.xml'
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    )
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    if res && res.code == 200 && res.body.include?('urn:Belkin:device:')
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      if res.body.include?('urn:Belkin:device:crockpot:1')
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        vprint_good('Wemo-enabled Crock-Pot detected')
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        return Exploit::CheckCode::Appears
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      end
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      vprint_status('Wemo device detected, but it is not a Crock-Pot')
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      return Exploit::CheckCode::Detected
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    end
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    Exploit::CheckCode::Safe
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  end
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  def run
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    if datastore['DefangedMode']
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      print_error('Running in defanged mode')
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      return
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    end
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    case action.name
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    when 'Cook'
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      print_status("Cooking on #{datastore['TEMP']} for #{datastore['TIME']}m")
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      res = send_request_cook(datastore['TEMP'], datastore['TIME'])
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    when 'Stop'
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      print_status('Setting temperature to Off and cook time to 0m')
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      res = send_request_cook('Off', 0)
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    end
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    unless res && res.code == 200 && (time = res.get_xml_document.at('//time'))
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      print_error("Failed to #{action.name.downcase}, aborting!")
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      return
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    end
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    print_good("Cook time set to #{time.text}m")
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  end
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  def send_request_cook(temp, time)
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    send_request_cgi(
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      'method'       => 'POST',
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      'uri'          => '/upnp/control/basicevent1',
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      'ctype'        => 'text/xml',
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      'headers'      => {
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        'SOAPACTION' => '"urn:Belkin:service:basicevent:1#SetCrockpotState"'
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      },
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      'data'         => generate_soap_xml(temp, time)
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    )
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  end
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  def generate_soap_xml(temp, time)
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    <<~EOF
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      <?xml version="1.0" encoding="utf-8"?>
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      <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
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        <s:Body>
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          <u:SetCrockpotState xmlns:u="urn:Belkin:service:basicevent:1">
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            <mode>#{modes[temp]}</mode>
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            <time>#{time}</time>
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          </u:SetCrockpotState>
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        </s:Body>
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      </s:Envelope>
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    EOF
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  end
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  def modes
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    {
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      'Off'  => 0,
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      'Warm' => 50,
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      'Low'  => 51,
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      'High' => 52
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    }
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  end
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end
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