[NSE] Added http-mobileversion-checker.nse.

scripts/http-mobileversion-checker.nse

@@ -0,0 +1,88 @@
+description = [[
+Checks if the website holds a mobile version.
+]]
+
+--- 
+-- @usage nmap -p80 --script http-mobileversion-checker.nse <host>
+--
+-- This script sets an Android User-Agent header and checks if the request 
+-- will be redirected to a page different than a (valid) browser request 
+-- would be. If so, this page is most likely to be a mobile version of the 
+-- app.
+--
+-- @args newtargets If this is set, add any newly discovered hosts to nmap 
+--                  scanning queue. Default: nil
+--
+-- @output
+-- PORT   STATE SERVICE REASON
+-- 80/tcp open  http    syn-ack
+-- |_ http-mobileversion-checker: Found mobile version: https://m.some-very-random-website.com (Redirected to a different host)
+--
+---
+
+categories = {"discovery", "safe"}
+author = "George Chatzisofroniou"
+license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
+
+local http = require "http"
+local target = require "target"
+local shortport = require "shortport"
+local httpspider = require "httpspider"
+local stdnse = require "stdnse"
+local table = require "table"
+local string = require "string"
+
+getLastLoc = function(host, port, useragent)
+
+    local options
+
+    options = {header={}, no_cache=true, redirect_ok=function(host,port)
+        local c = 3
+        return function(url)
+            if ( c==0 ) then return false end
+                c = c - 1
+                return true
+            end
+        end }
+
+
+    options['header']['User-Agent'] = useragent
+
+    response = http.get(host, port, '/', options)
+
+    if response.location then
+        return response.location[#response.location] or false
+    end
+
+    return false
+
+end
+
+portrule = shortport.port_or_service( {80, 443}, {"http", "https"}, "tcp", "open")
+
+action = function(host, port) 
+ 
+    local newtargets = stdnse.get_script_args("newtargets") or nil
+
+    -- We don't crawl any site. We initialize a crawler to use its iswithinhost method.
+    local crawler = httpspider.Crawler:new(host, port, '/', { scriptname = SCRIPT_NAME } )
+
+    loc = getLastLoc(host, port, "Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.17 (KHTML, like Gecko) Chrome/24.0.1312.57 Safari/537.17")
+    mobloc = getLastLoc(host, port, "Mozilla/5.0 (Linux; U; Android 4.0.3; ko-kr; LG-L160L Build/IML74K) AppleWebkit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30") 
+
+    -- If the mobile browser request is redirected to a different page, that must be the mobile version's page.
+    if loc ~= mobloc then
+        msg = "Found mobile version: " .. mobloc 
+        mobhost = http.parse_url(mobloc)
+        if not crawler:iswithinhost(mobhost.host) then    
+            msg = msg .. " (Redirected to a different host)" 
+            if newtargets then
+                target.add(mobhost.host)
+            end
+        end
+        return msg
+    end
+
+    return "No mobile version detected."
+
+end