Played a round of nse_check_globals and fixed a bunch of reported problems.

scripts/dns-zone-transfer.nse

@@ -1,3 +1,4 @@
+local bin = require "bin"
 local bit = require "bit"
 local dns = require "dns"
 local ipOps = require "ipOps"
@@ -299,13 +300,13 @@ local RD = {
     offset = offset + 4
     offset, lat, lon, alt = bin.unpack(">III", data, offset)
     lat = (lat-2^31)/3600000 --degrees
-    latd = 'N'
+    local latd = 'N'
     if lat < 0 then
       latd = 'S'
       lat = 0-lat
     end
     lon = (lon-2^31)/3600000 --degrees
-    lond = 'E'
+    local lond = 'E'
     if lon < 0 then
       lond = 'W'
       lon = 0-lon
@@ -329,6 +330,7 @@ function get_rdata(data, offset, ttype)
     elseif RD[typetab[ttype]] then
       return RD[typetab[ttype]](data, offset)
     else
+	  local field
       offset, field = bin.unpack("A" .. bto16(data, offset-2), data, offset)
       return offset, ("hex: %s"):format(stdnse.tohex(field))
     end

scripts/http-frontpage-login.nse

@@ -64,10 +64,10 @@ Default installations of older versions of frontpage extensions allow anonymous
 
 	if data and data.status and data.status == 200 then
 		--server does support frontpage extensions
-		fp_version = string.match(data.body,"FPVersion=\"[%d%.]*\"")
+		local fp_version = string.match(data.body,"FPVersion=\"[%d%.]*\"")
 		if fp_version then
 			-- do post request http://msdn.microsoft.com/en-us/library/ms446353
-			postdata = "method=open+service:".. fp_version .."&service_name=/"
+			local postdata = "method=open+service:".. fp_version .."&service_name=/"
 			data = http.post(host,port,path .. "/_vti_bin/_vti_aut/author.dll",nil,nil,postdata)
 			if data and data.status then
 				if data.status == 200  then

scripts/http-waf-fingerprint.nse

@@ -2,6 +2,7 @@ local http = require "http"
 local stdnse = require "stdnse"
 local shortport = require "shortport"
 local string = require "string"
+local table = require "table"
 local url = require "url"
 
 description = [[

scripts/mysql-vuln-cve2012-2122.nse

@@ -67,6 +67,7 @@ local mysql = require "mysql"
 local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
+local string = require "string"
 local table = require "table"
 local vulns = require "vulns"
 local openssl = stdnse.silent_require "openssl"