Token used to secure library file access in the index.html page

Currently, I am facing an issue with my index.html files. One is dedicated for the login page, and once a user successfully logs in, the entire index.html file gets loaded. This main index.html file contains various library files such as AngularJS and others served from the server.

The security scan I ran flagged that there is no CSRF token present for these files. While I have implemented CSRF tokens for all post requests, the question arises whether they are necessary for fetching library files as well. I am utilizing AngularJS and JavaScript for this project.

javascriptangularjssecuritycsrf

Answer №1

It is generally advised not to implement a CSRF token for AngularJS static files because they do not require access control. The AngularJS application acts as a superficial shell that does not reveal any confidential data (or at least, it shouldn't). The backend should be responsible for handling and preventing CSRF attacks to ensure that unauthorized requests are not sent without the user's consent.

Answer №2

Many csrf libraries have a default setting to ignore GET, HEAD, and OPTIONS requests. One example of this is the library csurf. You can usually find a property called ignoreMethods in the options. If you are using csurf or a similar library, look for a configuration option like this one. For instance, with csurf, you can adjust the settings to not ignore GET requests by doing the following:

const csrf = require('csurf');

const csrfMiddleware = csrf({
  ignoreMethods: ['OPTIONS', 'HEAD']  // <--- change the default to only ignore OPTIONS and HEAD 
});

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