118 lines
4.4 KiB
Lua
118 lines
4.4 KiB
Lua
local natpmp = require "natpmp"
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local nmap = require "nmap"
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local shortport = require "shortport"
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local stdnse = require "stdnse"
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local table = require "table"
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description = [[
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Maps a WAN port on the router to a local port on the client using the NAT Port Mapping Protocol (NAT-PMP). It supports the following operations:
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* map - maps a new external port on the router to an internal port of the requesting IP
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* unmap - unmaps a previously mapped port for the requesting IP
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* unmapall - unmaps all previously mapped ports for the requesting IP
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]]
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---
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-- @usage
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-- nmap -sU -p 5351 <ip> --script nat-pmp-mapport --script-args='op=map,pubport=8080,privport=8080,protocol=tcp'
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-- nmap -sU -p 5351 <ip> --script nat-pmp-mapport --script-args='op=unmap,pubport=8080,privport=8080,protocol=tcp'
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-- nmap -sU -p 5351 <ip> --script nat-pmp-mapport --script-args='op=unmapall,protocol=tcp'
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--
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-- @output
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-- PORT STATE SERVICE
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-- 5351/udp open nat-pmp
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-- | nat-pmp-mapport:
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-- |_ Successfully mapped tcp 1.2.3.4:8080 -> 192.168.0.100:80
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--
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-- @args nat-pmp-mapport.op operation, can be either map, unmap or unmap all
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-- o map allows you to map an external port to an internal port of the calling IP
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-- o unmap removes the external port mapping for the specified ports and protocol
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-- o unmapall removes all mappings for the specified protocol and calling IP
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--
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-- @args nat-pmp-mapport.pubport the external port to map on the router. The
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-- specified port is treated as the requested port. If the port is available
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-- it will be allocated to the caller, otherwise the router will simply
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-- choose another port, create the mapping and return the resulting port.
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--
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-- @args nat-pmp-mapport.privport the internal port of the calling IP to map requests
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-- to. This port will receive all requests coming in to the external port on the
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-- router.
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--
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-- @args nat-pmp-mapport.protocol the protocol to map, can be either tcp or udp.
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--
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-- @args nat-pmp-mapport.lifetime the lifetime of the mapping in seconds (default: 3600)
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--
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-- @see nat-pmp-info.nse
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author = "Patrik Karlsson"
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license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
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categories = {"discovery", "safe"}
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portrule = shortport.port_or_service(5351, "nat-pmp", {"udp"} )
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local arg_pubport = stdnse.get_script_args(SCRIPT_NAME .. ".pubport")
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local arg_privport= stdnse.get_script_args(SCRIPT_NAME .. ".privport")
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local arg_protocol= stdnse.get_script_args(SCRIPT_NAME .. ".protocol")
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local arg_lifetime= stdnse.get_script_args(SCRIPT_NAME .. ".lifetime") or 3600
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local arg_op = stdnse.get_script_args(SCRIPT_NAME .. ".op") or "map"
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local function fail(str) return stdnse.format_output(false, str) end
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action = function(host, port)
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local op = arg_op:lower()
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if ( "map" ~= op and "unmap" ~= op and "unmapall" ~= op ) then
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return fail("Operation must be either \"map\", \"unmap\" or \"unmapall\"")
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end
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if ( ("map" == op or "unmap" == op ) and
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( not(arg_pubport) or not(arg_privport) or not(arg_protocol) ) ) then
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return fail("The arguments pubport, privport and protocol are required")
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elseif ( "unmapall" == op and not(arg_protocol) ) then
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return fail("The argument protocol is required")
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end
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local helper = natpmp.Helper:new(host, port)
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if ( "unmap" == op or "unmapall" == op ) then
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arg_lifetime = 0
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end
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if ( "unmapall" == op ) then
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arg_pubport, arg_privport = 0, 0
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end
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local status, response = helper:getWANIP()
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if ( not(status) ) then
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return fail("Failed to retrieve WAN IP")
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end
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local wan_ip = response.ip
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local lan_ip = (nmap.get_interface_info(host.interface)).address
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local status, response = helper:mapPort(arg_pubport, arg_privport, arg_protocol, arg_lifetime)
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if ( not(status) ) then
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return fail(response)
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end
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local output
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if ( "unmap" == op ) then
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output = ("Successfully unmapped %s %s:%d -> %s:%d"):format(
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arg_protocol, wan_ip, response.pubport, lan_ip, response.privport )
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elseif ( "unmapall" == op ) then
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output = ("Sucessfully unmapped all %s NAT mappings for %s"):format(arg_protocol, lan_ip)
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else
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output = ("Successfully mapped %s %s:%d -> %s:%d"):format(
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arg_protocol, wan_ip, response.pubport, lan_ip, response.privport )
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if ( tonumber(arg_pubport) ~= tonumber(response.pubport) ) then
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output = { output }
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table.insert(output, "WARNING: Requested public port could not be allocated")
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end
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end
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return stdnse.format_output(true, output)
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end
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