Is CSRF possible with Bearer Token?

The Bearer Authentication is a good way to prevent CSRF, as there is no way for an attacker to know the value of a valid token of an authenticated user. In absence of a token, they may rely on cookies for authentication which will make the web application vulnerable to CSRF.

Is Bearer Token same as OAuth?

Bearer Tokens are the predominant type of access token used with OAuth 2.0. To get an access token you send the Authentication server this bearer token along with your client id. This way the server knows that the application using the bearer token is the same application that the bearer token was created for.

Do I need CSRF for API?

An API pretty much precludes CSRF, because its entire purpose is generally to allow 3rd-party entities to access and manipulate data on your site (the “cross-site” in CSRF). So, yes, I think as a rule any API view should be CSRF exempt.

Why is X-Csrf-Token request header missing when using bearer authentication?

Moved this issue to Simple Oauth issue queue to solve it within its codebase. If Simple Oauth is not enabled, Bearer header makes no sense. Implementing approach suggested by hchonov: decorating a CsrfRequestHeaderAccessCheck from within simple_oauth module, and skipping csrf token check within this decorator.

How to add Authorization header with Bearer Token?

Just add Authorization header with any bearer token (without having enabled simple_oauth at all), and CSRF token check will be cancelled. As I would see the solution, we would need to know not only that the user is authenticated, but which method was used for authentication.

Do you need CSRF protection for Bearer tokens?

If you only use authentication via Bearer tokens and not via cookies, then there is no concern of CSRF vulnerability, and no extra steps are required for security. It’s Incorrect to say that “as long as authentication happens in the header and not by cookies that you don’t have to worry about csrf-protection.”.

How does CSRF occur in a web page?

CSRF occurs because a request to a HTTP end point automatically includes cookies (as it should) plus required headers as described by the server and doesn’t require a user to physically do something. They simply visit a web page with the CSRF vector on.

Is CSRF possible with bearer token?

The Bearer Authentication is a good way to prevent CSRF, as there is no way for an attacker to know the value of a valid token of an authenticated user. In absence of a token, they may rely on cookies for authentication which will make the web application vulnerable to CSRF.

Is CSRF mitigated if the token is added to another header?

CSRF tokens prevent CSRF because without token, attacker cannot create a valid requests to the backend server. CSRF tokens should not be transmitted using cookies. The CSRF token can be added through hidden fields, headers, and can be used with forms, and AJAX calls.

Is bearer token sensitive?

from : URI-Reference. Unless otherwise noted, all the protocol parameter names and values are case sensitive. A security token with the property that any party in possession of the token (a “bearer”) can use the token in any way that any other party in possession of it can. Using a bearer token.

What is CSRF Token and how it works?

A CSRF Token is a secret, unique and unpredictable value a server-side application generates in order to protect CSRF vulnerable resources. The tokens are generated and submitted by the server-side application in a subsequent HTTP request made by the client.

Do you need a CSRF token for bearer JWT?

The short of it is that as long as authentication isn’t automatic (typically provided by the browser) then you don’t have to worry about CSRF protection. If your application is attaching the credentials via an Authorization header then the browser can’t automatically authenticate the requests, and CSRF isn’t possible.

How does cross-site request forgery ( CSRF ) attack work?

Cross-Site Request Forgery (CSRF) is a type of attack that occurs when a malicious web site, email, blog, instant message, or program causes a user’s web browser to perform an unwanted action on a trusted site when the user is authenticated. A CSRF attack works because browser requests automatically include all cookies including session cookies.

Why are GET requests vulnerable to CSRF attacks?

Apps that change state on GET requests, where variables or resources are altered, are vulnerable to malicious attacks. GET requests that change state are insecure. A best practice is to never change state on a GET request. CSRF attacks are possible against web apps that use cookies for authentication because:

When does user request token to the server?

I know when user request token to the server it can come with a validity of 14 days or 24 hours. but once the user has token there is no neat (assured) way of securing this from XSS or CSRF attacks (am I missing something?). Now lets say user is logged into the web application and the browser has this token which is valid for 14 days.