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Jenkins error – Blocked script execution in . because the document’s frame is sandboxed and the ‘allow-scripts’ permission is not set

I’m aware that if we use a iFrame in HTML we’ve to sandbox it & add the ‘allow-scripts’ permission to be true.

But my problem is I don’t have a iFrame at all in my pure Angular JS application. When I run it on my local machine it works fine.

The moment I deploy it to my server, Chrome displays this error message along with the below error:

Refused to load the style ‘bootstrap.min.css’ because it violates the following Content Security Policy directive: “style-src ‘self'”.

Blocked script execution in ‘dashboard.html’ because the document’s frame is sandboxed and the ‘allow-scripts’ permission is not set.

I’m not invoking the page from a 3rd party site or elsewhere which could possibly inject my source & make it appear in a iframe. I inspected the code & I can confirm there are no iframes at all.

BTW, I use a very old version of Chrome (26) and Firefox (10) [Organisational restrictions]. This happens on IE11 as well (Though no error message displayed) the page doesn’t load up.

What could be causing this ? Am I missing anything here ? Any pointers would be greatly appreciated.

Below is a snapshot of what I’m trying to do… Trivial parts trimmed out..

<html lang="en" ng-app="dashboard">
   <head>
      <title>Dashboard</title>
      <link href="css/bootstrap.min.css" rel="stylesheet">
      <script src="js/jquery.min.js"></script>
      <script src="js/angular.min.js"></script>
      <script src="js/ui-bootstrap-tpls-0.6.0.js"></script>
      <script src="js/bootstrap.min.js"></script>
      <script src="js/notifications.js"></script>
      <style>
         body { background-color: #F3F3F4; color: #676a6c; font-size: 13px;}
      </style>
      <script>
         var dashboardApp = angular.module('dashboard', ['ui.bootstrap', 'notificationHelper']);
         
         Type = {
            APP : 0, CTL : 1
         }
         
         
         function DashboardCtrl($scope, $location, $timeout, $http, $log, $q) {
            $scope.environments = [ { ... }];
            $scope.columns = [ { ... } ];
         
             $scope.Type = window.Type;
            $scope.applications = [{ ... }];
         
            $scope.selectedEnv = null;
         
            var resetModel = function(applications) {
                applications.forEach(function(app) {
                     var hosts=$scope.findHosts(app, $scope.selectedEnv);
                     if(hosts){
                         hosts.forEach(function(host){
                             $scope.initStatus(app.status,host);
                         });
                     }
                });
            };
         
            var timeoutPromise = null;
         
             $scope.initStatus = function (status,host) {
                 status[host]=[{
                     ...
                 }];
         
             };             
         }
         
      </script>
   </head>
   <body ng-controller="DashboardCtrl">
      <div class="request-notifications" ng-notifications></div>
      <div>
         <tabset>
            <tab ng-repeat="env in environments" heading="{{env.name}}" select="set(env)" active="env.tab_active">
               <div class="col-md-6" ng-repeat="column in columns" ng-class="{'vertical-seperator':$first}">
                  <div class="panel" ng-class="{'first-child':$first}">
                     <div class="panel-heading">
                        <h3>{{column.column}}</h3>
                     </div>
                     <div class="panel-body">
                        <div class="frontends" ng-repeat="layer in column.layers">
                           <h4>{{layer.name}}</h4>
                           <div class="category" ng-repeat="category in layer.categories" ng-class="category.css">
                              <div class="category-heading">
                                 <h4>{{category.name}}</h4>
                              </div>
                              <div class="category-body group" ng-repeat="group in category.groups">
                                 <div ng-if="!env[group.host]">
                                    <h4>{{group.name}}</h4>
                                    <span class="label label-danger">Not deployed</span>
                                 </div>
                                 <div ng-repeat="host in env[group.host]">
                                    <div class="group-info">
                                       <div class="group-name">{{group.name}}</div>
                                       <div class="group-node"><strong>Node : </strong>{{host}}</div>
                                    </div>
                                    <table class="table table-striped">
                                       <thead>
                                          <tr>
                                             ...
                                          </tr>
                                       </thead>
                                       <tbody>
                                          <tr class="testStatusPage" ng-repeat="app in apps | filter: { column: column.column, layer: layer.name, category: category.name, group: group.name } : true">
                                             <!-- Application Home Links -->
                                             <td class="user-link" ng-if="app.type === Type.A || app.type === Type.A1 || app.type === Type.B || app.type === Type.B1 || app.type === Type.C"><a href="{{app.link}}">{{app.text}}</a></td>                                                                                          <td ng-if="app.status[host].statusCode == 0" class="result statusResult"><span class="label label-success">Success</span></td>
                                             <td ng-if="app.status[svr].status != null && app.status[host].status != 0" class="result statusResult"><span class="label label-danger">{{app.status[host].error}}</span></td>
                                          </tr>
                                       </tbody>
                                    </table>
                                 </div>
                              </div>
                           </div>
                        </div>
                     </div>
                  </div>
               </div>
            </tab>
         </tabset>
      </div>
   </body>
</html>

Answer

We were using this content HTML in a Jenkins userContent directory. We recently upgraded to the latest Jenkins 1.625 LTS version & it seems they’ve introduced new Content security policy which adds the below header to the response headers & the browsers simply decline to execute anything like stylesheets / Javascripts.

X-Content-Security-Policy: sandbox; default-src 'none'; img-src 'self'; style-src 'self';

To get over it, we had to simply remove this header by resetting the below property in Jenkins.

System.setProperty("hudson.model.DirectoryBrowserSupport.CSP", "")

Those who upgrade to Jenkins 1.625 & use the userContent folder might be affected by this change.

For more information refer https://wiki.jenkins-ci.org/display/JENKINS/Configuring+Content+Security+Policy