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local shortport = require "shortport"
local netbios = require "netbios"
local nmap = require "nmap"
local stdnse = require "stdnse"
local string = require "string"
local table = require "table"
description = [[
Retrieves IP addresses of the target's network interfaces via NetBIOS NS.
Additional network interfaces may reveal more information about the target,
including finding paths to hidden non-routed networks via multihomed systems.
]]
---
-- @usage
-- nmap -sU -p 137 --script nbns-interfaces <host>
--
-- @output
-- PORT STATE SERVICE
-- 137/udp open netbios-ns
-- | nbns-interfaces:
-- | hostname: NOTEBOOK-NB3
-- | interfaces:
-- | 10.5.4.89
-- | 192.168.56.1
-- |_ 172.24.80.1
-- MAC Address: 9C:7B:EF:AA:BB:CC (Hewlett Packard)
--
-- @xmloutput
-- <elem key="hostname">NOTEBOOK-NB3</elem>
-- <table key="interfaces">
-- <elem>10.5.4.89</elem>
-- <elem>192.168.56.1</elem>
-- <elem>172.24.80.1</elem>
-- </table>
---
author = {"Andrey Zhukov from USSC"}
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"default", "discovery", "safe"}
portrule = nmap.address_family() == 'inet' -- NBNS is IPv4 only
and shortport.portnumber(137, "udp")
or function () return false end
get_ip = function (buf)
return table.concat({buf:byte(1, 4)}, ".")
end
action = function (host)
local output = stdnse.output_table()
local status, server_name = netbios.get_server_name(host)
if not (status and server_name) then
return stdnse.format_output(false, "Failed to get NetBIOS server name of the target")
end
local status, result = netbios.nbquery(host, server_name)
if not status then
return stdnse.format_output(false, "Failed to get remote network interfaces")
end
output.hostname = server_name
output.interfaces = {}
for _, v in ipairs(result) do
for i=1, #v.data, 6 do
output.interfaces[#output.interfaces + 1] = get_ip(v.data:sub(i+2, i+2+3))
end
end
return output
end
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