Issue 6871 - Reject filters with blank CSPs

lib/filterClasses.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 763 matching lines @@
           if (contentType == null)
             ({contentType} = RegExpFilter.prototype);
           contentType &= ~type;
         }
         else
         {
           contentType |= type;
 
           if (type == RegExpFilter.typeMap.CSP && value)
             csp = value;
+          else if (type == RegExpFilter.typeMap.CSP && !value)
+            return new InvalidFilter(origText, "filter_invalid_csp");
         }
       }
       else
       {
         switch (option.toLowerCase())
         {
           case "match-case":
             matchCase = !inverse;
             break;
           case "domain":
@@ skipping 373 matching lines @@
 
   /**
    * Script that should be executed
    * @type {string}
    */
   get script()
   {
     return this.body;
   }
 });