Adds broadcast-hid-discoveryd to discover HID devices on a LAN by sending a discoveryd network broadcast probe. Closes #1232

CHANGELOG

@@ -1,5 +1,8 @@
 #Nmap Changelog ($Id$); -*-text-*-
 
+o [NSE][GH#1232] Added broadcast-hid-discoveryd to discover HID devices 
+  on a LAN by sending a discoveryd network broadcast probe. [Brendan Coles]
+
 o New service probe and match lines for adb, the Android Debug Bridge, which
   allows remote code execution and is left enabled by default on many devices.
   [Daniel Miller]

scripts/broadcast-hid-discoveryd.nse

@@ -0,0 +1,98 @@
+local nmap = require "nmap"
+local packet = require "packet"
+local stdnse = require "stdnse"
+local string = require "string"
+local target = require "target"                                                                             
+
+description = [[
+Discovers HID devices on a LAN by sending a discoveryd network broadcast probe.
+
+For more information about HID discoveryd, see:
+* http://nosedookie.blogspot.com/2011/07/identifying-and-querying-hid-vertx.html
+* https://github.com/coldfusion39/VertXploit
+]]
+
+---
+-- @usage nmap --script broadcast-hid-discoveryd
+-- @usage nmap --script broadcast-hid-discoveryd --script-args timeout=15s
+--
+-- @output
+-- Pre-scan script results:
+-- | broadcast-hid-discoveryd: 
+-- |   MAC: 00:06:8E:00:00:00; Name: NoEntry; IP Address: 10.123.123.1; Model: EH400; Version: 2.3.1.603 (04/23/2012)
+-- |   MAC: 00:06:8E:FF:FF:FF; Name: NoExit; IP Address: 10.123.123.123; Model: EH400; Version: 2.3.1.603 (04/23/2012)
+-- |_  Use --script-args=newtargets to add the results as targets
+--
+-- @args broadcast-hid-discoveryd.address
+--       address to which the probe packet is sent. (default: 255.255.255.255)
+-- @args broadcast-hid-discoveryd.timeout
+--       socket timeout (default: 5s)
+---
+
+author = "Brendan Coles"
+license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
+categories = {"discovery", "broadcast", "safe"}
+
+prerule = function() return ( nmap.address_family() == "inet") end
+
+local arg_address = stdnse.get_script_args(SCRIPT_NAME .. ".address")
+local arg_timeout = stdnse.parse_timespec(stdnse.get_script_args(SCRIPT_NAME .. ".timeout"))
+
+action = function()
+
+  local host = { ip = arg_address or "255.255.255.255" }
+  local port = { number = 4070, protocol = "udp" }
+  local socket = nmap.new_socket("udp")
+
+  socket:set_timeout(500)
+
+  -- send two packets, just in case
+  for i=1,2 do
+    local status = socket:sendto(host, port, "discover;013;")
+    if ( not(status) ) then
+      return stdnse.format_output(false, "Failed to send broadcast probe")
+    end
+  end
+
+  local timeout = tonumber(arg_timeout) or ( 20 / ( nmap.timing_level() + 1 ) )
+  local results = {}
+  local stime = os.time()
+
+  -- listen until timeout
+  repeat
+    local status, data = socket:receive()
+    if ( status ) then
+      local hid_pkt = data:match("^discovered;.*$")
+      if ( hid_pkt ) then
+        local status, _, _, rhost, _ = socket:get_info()
+        local hid_data = stdnse.strsplit(";", hid_pkt)
+        if #hid_data == 10 and hid_data[1] == 'discovered' and tonumber(hid_data[2]) == string.len(hid_pkt) then
+          stdnse.print_debug(2, "Received HID discoveryd response from %s (%s bytes)", rhost, string.len(hid_pkt))
+          local str = ("MAC: %s; Name: %s; IP Address: %s; Model: %s; Version: %s (%s)"):format(
+            hid_data[3], hid_data[4], hid_data[5], hid_data[7], hid_data[8], hid_data[9])
+          table.insert( results, str )
+          if target.ALLOW_NEW_TARGETS then                                                                        
+            target.add(hid_data[5])
+          end
+        end
+      end
+    end
+  until( os.time() - stime > timeout )
+  socket:close()
+
+  local output = stdnse.output_table()
+  if #results > 0 then
+    -- remove duplicates
+    local hash = {}
+    for _,v in ipairs(results) do
+      if (not hash[v]) then
+        table.insert( output, v )
+        hash[v] = true
+      end
+    end
+    if not target.ALLOW_NEW_TARGETS then
+      output[#output + 1] = "Use --script-args=newtargets to add the results as targets"
+    end
+    return output
+  end
+end

scripts/script.db

@@ -33,6 +33,7 @@ Entry { filename = "broadcast-dhcp6-discover.nse", categories = { "broadcast", "
 Entry { filename = "broadcast-dns-service-discovery.nse", categories = { "broadcast", "safe", } }
 Entry { filename = "broadcast-dropbox-listener.nse", categories = { "broadcast", "safe", } }
 Entry { filename = "broadcast-eigrp-discovery.nse", categories = { "broadcast", "discovery", "safe", } }
+Entry { filename = "broadcast-hid-discoveryd.nse", categories = { "broadcast", "discovery", "safe", } }
 Entry { filename = "broadcast-igmp-discovery.nse", categories = { "broadcast", "discovery", "safe", } }
 Entry { filename = "broadcast-listener.nse", categories = { "broadcast", "safe", } }
 Entry { filename = "broadcast-ms-sql-discover.nse", categories = { "broadcast", "safe", } }