metasploit-framework/modules/auxiliary/admin/natpmp/natpmp_map.rb

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##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
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##
require 'msf/core'
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class MetasploitModule < Msf::Auxiliary
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include Msf::Auxiliary::Report
include Msf::Auxiliary::Scanner
include Msf::Auxiliary::NATPMP
include Rex::Proto::NATPMP
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def initialize
super(
'Name' => 'NAT-PMP Port Mapper',
'Description' => 'Map (forward) TCP and UDP ports on NAT devices using NAT-PMP',
'Author' => 'Jon Hart <jhart[at]spoofed.org>',
'License' => MSF_LICENSE
)
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register_options(
[
OptString.new('EXTERNAL_PORTS', [true, 'The external ports to foward from (0 to let the target choose)', 0]),
OptString.new('INTERNAL_PORTS', [true, 'The internal ports to forward to', '22,135-139,80,443,445'])
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],
self.class
)
end
def build_ports(ports_string)
# We don't use Rex::Socket.portspec_crack because we need to allow 0 and preserve order
ports = []
ports_string.split(/[ ,]/).map { |s| s.strip }.compact.each do |port_part|
if /^(?<port>\d+)$/ =~ port_part
ports << port.to_i
elsif /^(?<low>\d+)\s*-\s*(?<high>\d+)$/ =~ port_part
ports |= (low..high).to_a.map(&:to_i)
else
fail ArgumentError, "Invalid port specification #{port_part}"
end
end
ports
end
def setup
super
@external_ports = build_ports(datastore['EXTERNAL_PORTS'])
@internal_ports = build_ports(datastore['INTERNAL_PORTS'])
if @external_ports.size > @internal_ports.size
fail ArgumentError, "Too many external ports specified (#{@external_ports.size}); " +
"must be one port (0) or #{@internal_ports.size} ports"
end
if @external_ports.size < @internal_ports.size
if @external_ports != [0]
fail ArgumentError, "Incorrect number of external ports specified (#{@external_ports.size}); " +
"must be one port (0) or #{@internal_ports.size} ports"
else
@external_ports = [0] * @internal_ports.size
end
end
end
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def run_host(host)
begin
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udp_sock = Rex::Socket::Udp.create({
'LocalHost' => datastore['CHOST'] || nil,
'Context' => {'Msf' => framework, 'MsfExploit' => self}
})
add_socket(udp_sock)
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external_address = get_external_address(udp_sock, host, datastore['RPORT']) || host
@external_ports.each_index do |i|
external_port = @external_ports[i]
internal_port = @internal_ports[i]
actual_ext_port = map_port(udp_sock, host, datastore['RPORT'], internal_port, external_port, Rex::Proto::NATPMP.const_get(protocol), lifetime)
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map_target = Rex::Socket.source_address(host)
requested_forwarding = "#{external_address}:#{external_port}/#{protocol}" +
" -> " +
"#{map_target}:#{internal_port}/#{protocol}"
if actual_ext_port
map_target = datastore['CHOST'] ? datastore['CHOST'] : Rex::Socket.source_address(host)
actual_forwarding = "#{external_address}:#{actual_ext_port}/#{protocol}" +
" -> " +
"#{map_target}:#{internal_port}/#{protocol}"
if external_port == 0
print_good("#{actual_forwarding} forwarded")
else
if (external_port != 0 && external_port != actual_ext_port)
print_good("#{requested_forwarding} could not be forwarded, but #{actual_forwarding} could")
else
print_good("#{requested_forwarding} forwarded")
end
end
else
print_error("#{requested_forwarding} could not be forwarded")
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end
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report_service(
:host => host,
:port => datastore['RPORT'],
:proto => 'udp',
:name => 'natpmp',
:state => Msf::ServiceState::Open
)
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end
rescue ::Interrupt
raise $!
rescue ::Rex::HostUnreachable, ::Rex::ConnectionTimeout, ::Rex::ConnectionRefused
nil
rescue ::Exception => e
print_error("Unknown error: #{e.class} #{e.backtrace}")
end
end
end