Can a CSRF token be used in a different request?
The string being used in the hash would be different on each request. As long as it was included in each request, the CSRF token validation could proceed. Since it is new on each request and only embedded in the page, outside access to the token would not be available.
When does OWASP csrfguard submit a Synchronizer token?
When a user interacts with this HTML, CSRF prevention tokens (i.e. cryptographically random synchronizer tokens) are submitted with the corresponding HTTP request. It is the responsibility of OWASP CSRFGuard to ensure the token is present and is valid for the current HTTP request.
How does CSRF guard protect against CSRF attacks?
CSRF Guard makes the connection between a token and a session id to check the token validity, Because of this dependency on the session identifiers; it cannot defend against login CSRF attacks.
How does csrfguard support optional verification of Ajax requests?
Prior to discarding the request, CSRFGuard can be configured to take one or more actions such as logging aspects of the request and redirecting the user to a landing page. The latest release enhances this strategy to support the optional verification of HTTP requests submitted using Ajax as well as the optional verification of referrer headers.
How to protect your server from CSRF attacks?
The defense against a CSRF attack is to use a CSRF token. This is a token generated by your server and provided to the client in some way. However, the big difference between a CSRF token and a session cookie is that the client will need to put the CSRF token in a non-cookie header (e.g., XSRF-TOKEN) whenever making a POST request to your backend.
Why are cookie based CSRF tokens good for spas?
Today we’ll gain a better understanding of CSRF and why cookie-based CSRF tokens are a good option for Single Page Applications (SPAs). What is a CSRF attack?
Is there an anti CSRF library for PHP?
Paragon Initiative Enterprises maintains an Anti-CSRF library for these corner cases. It works with one-use per-form tokens, exclusively. When enough tokens are stored in the session data (default configuration: 65535), it will cycle out the oldest unredeemed tokens first.