Module: Msf::Exploit::Remote::Dialup

Defined in:
lib/msf/core/exploit/dialup.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#modemObject

Returns the value of attribute modem


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# File 'lib/msf/core/exploit/dialup.rb', line 186

def modem
  @modem
end

Instance Method Details

#connect_dialup(global = true, opts = {}) ⇒ Object

Opens the modem connection


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# File 'lib/msf/core/exploit/dialup.rb', line 37

def connect_dialup(global = true, opts={})

  if (not @telephony_loaded)
    print_status("The serialport module is not available: #{telephony_error}")
    raise RuntimeError, "Telephony not available"
  end

  serialport = datastore['SERIALPORT']
  baud       = datastore['BAUDRATE'].to_i
  data_bits  = datastore['DATABITS'].to_i
  stop_bits  = datastore['STOPBITS'].to_i
  parity     = case datastore['PARITY']
    when 'Even' ; Telephony::Modem::EVEN
    when 'Odd'  ; Telephony::Modem::ODD
    when 'Mark' ; Telephony::Modem::MARK
    when 'Space'; Telephony::Modem::SPACE
    else          Telephony::Modem::NONE
  end
  flowcontrol  = case datastore['FLOWCONTROL']
    when 'Hardware' ; Telephony::Modem::HARD
    when 'Software' ; Telephony::Modem::SOFT
    when 'Both'     ; Telephony::Modem::HARD | Telephony::Modem::SOFT
    else              Telephony::Modem::NONE
  end

  initstring   = datastore['INITSTRING']
  dialprefix   = datastore['DIALPREFIX']
  dialsuffix   = datastore['DIALSUFFIX']
  dialtimeout  = datastore['DIALTIMEOUT'].to_i
  number       = datastore['NUMBER'].tr(' ', '')

  modem = Telephony::Modem.new(serialport)
  modem.params = {
    'baud'      => baud,
    'data_bits' => data_bits,
    'parity'    => parity,
    'stop_bits' => stop_bits
  }
  modem.flow_control = flowcontrol
  modem.display = datastore['DISPLAYMODEM']

  print_status("Initializing Modem")
  result = modem.put_command('ATZ', 3)
  if result != 'OK'
    print_error("Error resetting modem")
    return
  end
  result = modem.put_command(initstring, 3)
  if result != 'OK'
    print_error("Error initializing modem")
    return
  end

  print_status("Dialing: #{number} (#{dialtimeout} sec. timeout)")
  dialstring = dialprefix + ' ' + number
  dialstring += (' ' + dialsuffix) if dialsuffix

  time = Time.now
  result = modem.put_command(dialstring, dialtimeout)
  while result =~ /RINGING/i
    result = modem.get_response(dialtimeout-(Time.now-time))
  end

  case result
    when /CONNECT/i
      print_status("Carrier: #{result}" )
      self.modem = modem if global
      return modem
    else
      print_error("No Carrier")
      disconnect_dialup(modem)
      return nil
  end
end

#dialup_expect(regexp, timeout) ⇒ Object

Reads until timeout looking for regexp


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# File 'lib/msf/core/exploit/dialup.rb', line 122

def dialup_expect(regexp, timeout)
  res = {
    :match  => false,
    :buffer => nil,
  }
  return res if ! self.modem

  res[:buffer] = ''

  time = Time.now
  while Time.now < time + timeout
    c = self.modem.getc
    res[:buffer] += c.chr if c
    if res[:buffer].match(regexp) != nil
      res[:match] = true
      while c
        c = self.modem.getc
        res[:buffer] += c.chr if c
      end
      return res
    end
  end
  return res
end

#dialup_getcObject


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# File 'lib/msf/core/exploit/dialup.rb', line 147

def dialup_getc
  return false if ! self.modem
  return self.modem.getc
end

#dialup_getsObject


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# File 'lib/msf/core/exploit/dialup.rb', line 152

def dialup_gets
  return false if ! self.modem
  buffer = ''
  c = self.modem.getc
  while c != 0x0a
    buffer += c
    c = self.modem.getc
  end
  buffer += c
  return buffer
end

#dialup_putc(c) ⇒ Object


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# File 'lib/msf/core/exploit/dialup.rb', line 164

def dialup_putc(c)
  return false if ! self.modem
  return self.modem.putc(c)
end

#dialup_puts(string) ⇒ Object


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# File 'lib/msf/core/exploit/dialup.rb', line 169

def dialup_puts(string)
  return false if ! self.modem
  return self.modem.puts(string)
end

#disconnect_dialup(nmodem = self.modem) ⇒ Object

Closes the modem connection


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# File 'lib/msf/core/exploit/dialup.rb', line 113

def disconnect_dialup(nmodem = self.modem)
  if(nmodem)
    nmodem.flush
    nmodem.hangup
    nmodem.close
  end
end

#handler(nmodem = self.modem) ⇒ Object


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# File 'lib/msf/core/exploit/dialup.rb', line 174

def handler(nmodem = self.modem)
  # If the handler claims the modem, then we don't want it to get closed
  # during cleanup
  if ((rv = super) == Handler::Claimed)
    if (nmodem == self.modem)
      self.modem = nil
    end
  end

  return rv
end

#initialize(info = {}) ⇒ Object


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# File 'lib/msf/core/exploit/dialup.rb', line 6

def initialize(info = {})
  super

  register_options(
    [
      OptInt.new(   'BAUDRATE',     [true, 'Baud Rate', 19200]),
      OptEnum.new(  'DATABITS',     [true, 'Data Bits (4 is Windows Only)', '8', ['4', '5', '6', '7', '8'], '8']),
      OptString.new('DIALPREFIX',   [true, 'Dial Prefix', 'ATDT *67, *70,']),
      OptString.new('DIALSUFFIX',   [false, 'Dial Suffix', nil]),
      OptInt.new(   'DIALTIMEOUT',  [true, 'Dial Timeout in seconds', 60]),
      OptBool.new(  'DISPLAYMODEM', [true, 'Displays modem commands and responses on the console', false]),
      OptEnum.new(  'FLOWCONTROL',  [true, 'Flow Control', 'None', ['None', 'Hardware', 'Software', 'Both'], 'None']),
      OptString.new('INITSTRING',   [true, 'Initialization String', 'AT X6 S11=80']),
      OptString.new('NUMBER',       [true, 'Number to Dial (e.g. 1.800.950.9955, (202) 358-1234, 358.1234 etc.)', nil]),
      OptEnum.new(  'PARITY',       [true, 'Parity (Mark & Space are Windows Only)', 'None', ['None', 'Even', 'Odd', 'Mark', 'Space'], 'None']),
      OptString.new('SERIALPORT',   [true, 'Serial Port (e.g. 0 (COM1), 1 (COM2), /dev/ttyS0, etc.)', '/dev/ttyS0']),
      OptEnum.new(  'STOPBITS',     [true, 'Stop Bits', '1', ['1', '2'], '1']),
    ], self.class)

  deregister_options('RHOST')

  begin
    require 'telephony'
    @telephony_loaded = true
  rescue ::Exception => e
    @telephony_loaded = false
    @telephony_error  = e
  end
end