Can CSRF tokens be stolen?
Cross-Site Request Forgery (CSRF) is an attack that forces an end user to execute unwanted actions on a web application in which they’re currently authenticated. CSRF attacks specifically target state-changing requests, not theft of data, since the attacker has no way to see the response to the forged request.
What do session tokens protect against?
Anti-CSRF tokens (or simply CSRF tokens) are unique values used in web applications to prevent Cross-Site Request Forgery attacks (CSRF/XSRF). CSRF attacks are client-side attacks that can be used to redirect users to a malicious website, steal sensitive information, or execute other actions within a user’s session.
Why is CSRF token needed?
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.
What can you do with CSRF token?
CSRF tokens can prevent CSRF attacks by making it impossible for an attacker to construct a fully valid HTTP request suitable for feeding to a victim user.
Can a attacker have both a user and a CSRF token?
The attacker needs both a valid user’s session and the corresponding csrf token. The attacker may have his own appropriate account to log on, but then he could just perform the operation anyway. Or he may have a csrf token, but either unauthenticated, or to a lower privilege account. But he cannot have both, and that’s the point.
Why is session ID used as XSRF token?
XSS attacks are likely to permit an attacker to acquire the CSRF token, since it’s common practice to bake it into the DOM (e.g. as the value of an element in a .
Should you terminate a session when an incorrect CSRF?
However, as I understand it terminating the user’s session would lead to another vulnerability – an attacker could deliberately submit an incorrect CSRF token with the aim of failing, causing the user to logout (Logout CSRF vulnerability). Hence, my question; Should the user’s session be terminated upon submitting an incorrect CSRF token or not?
What’s the problem with CSRF on a server?
CSRF is basically about an attacker exploiting a user’s existing session via the way cookies work in a browser. The underlying problem is that a cookie is sent with a request regardless of where (which origin, ie. domain) the request comes from, the only thing that counts is where it goes to.