From 53ca0c01dd529ba279bdd03de11d9c040a23b733 Mon Sep 17 00:00:00 2001
From: devin <devin@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Wed, 28 May 2014 02:29:31 +0000
Subject: [PATCH] Added checks to prevent scripts from indexing a nill value
 when scanning localhost.

---
 nselib/shortport.lua              |  2 +-
 scripts/http-robtex-shared-ns.nse | 10 ++++++----
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/nselib/shortport.lua b/nselib/shortport.lua
index bc9db6c8d..64ddfc3ab 100644
--- a/nselib/shortport.lua
+++ b/nselib/shortport.lua
@@ -197,7 +197,7 @@ local LIKELY_SSL_SERVICES = {
 -- @usage
 -- portrule = shortport.ssl
 function ssl(host, port)
-  return port.version.service_tunnel == "ssl" or
+  return (port.version and port.version.service_tunnel == "ssl") or
     port_or_service(LIKELY_SSL_PORTS, LIKELY_SSL_SERVICES, {"tcp", "sctp"})(host, port)
 end
 
diff --git a/scripts/http-robtex-shared-ns.nse b/scripts/http-robtex-shared-ns.nse
index 358a6ab83..065c8acb5 100644
--- a/scripts/http-robtex-shared-ns.nse
+++ b/scripts/http-robtex-shared-ns.nse
@@ -51,10 +51,12 @@ function parse_robtex_response(data)
   data = data:match("<span id=\"sharednss\">.-<ul.->(.-)</ul>")
 
   -- process each html list item
-  for li in data:gmatch("<li>(.-)</li>") do
-    local domain = li:match("<a.->(.*)</a>")
-    if ( domain ) then
-      table.insert(result, domain)
+  if data then
+    for li in data:gmatch("<li>(.-)</li>") do
+      local domain = li:match("<a.->(.*)</a>")
+      if ( domain ) then
+        table.insert(result, domain)
+      end
     end
   end