Security fix: unauthorized access (#10091)

* Security fix: unauthorized access
Affects nginx users:
Moved php files outside of public html directory (Apache was protected by .htaccess)

Affects all users:
Some files did not check for authentication and could disclose some info.
Better checks before including files from user input

* git mv html/includes/ includes/html
git mv html/pages/ includes/html/

includes/html/forms/sensor-update.inc.php

@@ -0,0 +1,55 @@
+<?php
+
+/*
+ * LibreNMS
+ *
+ * Copyright (c) 2014 Neil Lathwood <https://github.com/laf/ http://www.lathwood.co.uk>
+ * Copyright (c) 2018 TheGreatDoc <https://github.com/TheGreatDoc>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.  Please see LICENSE.txt at the top level of
+ * the source code distribution for details.
+ */
+
+use LibreNMS\Authentication\LegacyAuth;
+
+header('Content-type: application/json');
+
+if (!LegacyAuth::user()->hasGlobalAdmin()) {
+    $response = array(
+        'status'  => 'error',
+        'message' => 'Need to be admin',
+    );
+    echo _json_encode($response);
+    exit;
+}
+
+$status  = 'error';
+$message = 'Error updating sensor limit';
+$device_id = $_POST['device_id'];
+$sensor_id = $_POST['sensor_id'];
+$value_type = $_POST['value_type'];
+$data = $_POST['data'];
+
+if (!is_numeric($device_id)) {
+    $message = 'Missing device id';
+} elseif (!is_numeric($sensor_id)) {
+    $message = 'Missing sensor id';
+} elseif (!isset($data)) {
+    $message = 'Missing data';
+} else {
+    if (dbUpdate(array($value_type => set_null($data, array('NULL')), 'sensor_custom' => 'Yes'), 'sensors', '`sensor_id` = ? AND `device_id` = ?', array($sensor_id, $device_id)) >= 0) {
+        $message = 'Sensor value updated';
+        $status = 'ok';
+    } else {
+        $message = 'Could not update sensor value';
+    }
+}
+
+$response = array(
+    'status'        => $status,
+    'message'       => $message,
+);
+echo _json_encode($response);