140 lines
3.0 KiB
Ruby
140 lines
3.0 KiB
Ruby
##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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##
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require 'msf/core'
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class Metasploit3 < Msf::Auxiliary
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include Msf::Exploit::Capture
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include Msf::Auxiliary::Scanner
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include Msf::Auxiliary::Report
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def initialize
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super(
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'Name' => 'TCP "XMas" Port Scanner',
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'Description' => %q{
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Enumerate open|filtered TCP services using a raw
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"XMas" scan; this sends probes containing the FIN,
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PSH and URG flags.
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},
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'Author' => 'kris katterjohn',
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'License' => MSF_LICENSE
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)
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register_options([
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OptString.new('PORTS', [true, "Ports to scan (e.g. 22-25,80,110-900)", "1-10000"]),
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OptInt.new('TIMEOUT', [true, "The reply read timeout in milliseconds", 500]),
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OptInt.new('BATCHSIZE', [true, "The number of hosts to scan per set", 256]),
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OptString.new('INTERFACE', [false, 'The name of the interface'])
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], self.class)
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deregister_options('FILTER','PCAPFILE')
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end
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# No IPv6 support yet
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def support_ipv6?
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false
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end
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def run_batch_size
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datastore['BATCHSIZE'] || 256
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end
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def run_batch(hosts)
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open_pcap
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pcap = self.capture
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ports = Rex::Socket.portspec_crack(datastore['PORTS'])
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if ports.empty?
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print_error("Error: No valid ports specified")
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return
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end
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to = (datastore['TIMEOUT'] || 500).to_f / 1000.0
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# Spread the load across the hosts
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ports.each do |dport|
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hosts.each do |dhost|
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shost, sport = getsource(dhost)
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pcap.setfilter(getfilter(shost, sport, dhost, dport))
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begin
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probe = buildprobe(shost, sport, dhost, dport)
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capture_sendto(probe, dhost)
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reply = probereply(pcap, to)
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next if reply # Got a RST back
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print_status(" TCP OPEN|FILTERED #{dhost}:#{dport}")
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#Add Report
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report_note(
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:host => dhost,
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:proto => 'tcp',
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:port => dport,
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:type => "TCP OPEN|FILTERED #{dhost}:#{dport}",
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:data => "TCP OPEN|FILTERED #{dhost}:#{dport}"
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)
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rescue ::Exception
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print_error("Error: #{$!.class} #{$!}")
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end
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end
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end
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close_pcap
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end
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def getfilter(shost, sport, dhost, dport)
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# Look for associated RSTs
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"tcp and (tcp[13] & 0x04) != 0 and " +
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"src host #{dhost} and src port #{dport} and " +
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"dst host #{shost} and dst port #{sport}"
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end
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def getsource(dhost)
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# srcip, srcport
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[ Rex::Socket.source_address(dhost), rand(0xffff - 1025) + 1025 ]
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end
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def buildprobe(shost, sport, dhost, dport)
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p = PacketFu::TCPPacket.new
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p.ip_saddr = shost
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p.ip_daddr = dhost
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p.tcp_sport = sport
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p.tcp_flags.fin = 1
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p.tcp_flags.urg = 1
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p.tcp_flags.psh = 1
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p.tcp_dport = dport
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p.tcp_win = 3072
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p.recalc
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p
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end
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def probereply(pcap, to)
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reply = nil
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begin
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Timeout.timeout(to) do
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pcap.each do |r|
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pkt = PacketFu::Packet.parse(r)
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next unless pkt.is_tcp?
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reply = pkt
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break
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end
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end
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rescue Timeout::Error
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end
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return reply
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end
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end
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