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In most cases the SameSite cookie attribute should not be depended on as a single line of defence against CSRF attacks. However, if used in conjunction with a secure Anti-CSRF mechanism the SameSite attribute can be used to further mitigate the environment against CSRF attacks.
When should I use anti-forgery token?
To prevent CSRF attacks, use anti-forgery tokens with any authentication protocol where the browser silently sends credentials after the user logs in. This includes cookie-based authentication protocols, such as forms authentication, as well as protocols such as Basic and Digest authentication.
Is SameSite None safe?
SameSite=None requires Secure The warning appears because any cookie that requests SameSite=None but is not marked Secure will be rejected. To fix this, you will have to add the Secure attribute to your SameSite=None cookies. A Secure cookie is only sent to the server with an encrypted request over the HTTPS protocol.
How do I fix the SameSite cookie problem?
Fix SameSite cookie in Chrome
- Open the Chrome browser.
- Search for “SameSite by default cookies” and choose to “Enable“
- Search for “Cookies without SameSite must be secure” and choose to “Enable“
- Restart Chrome.
What does an anti forgery token add?
This is to prevent Cross-site request forgery in your MVC application. This is part of the OWASP Top 10 and it is vital in terms of web security. Using the @Html. AntiforgeryToken() method will generate a token per every request so then no one can forge a form post.
How do you test an anti forgery token?
In ASP.Net Core anti forgery token is automatically added to forms, so you don’t need to add @Html. AntiForgeryToken() if you use razor form element or if you use IHtmlHelper. BeginForm and if the form’s method isn’t GET. And when user submits form this token is verified on server side if validation is enabled.
Is Csrf dead?
When operating in Strict mode the browser will not send the cookie on any cross-origin request, at all, so CSRF is completely dead in the water. The second cookie however, the sensitive cookie, would have the SameSite attribute set and the attacker can’t abuse its authority in cross-origin requests.
How do you resolve the SameSite problem?
Resolve this issue by updating the attributes of the cookie: -> Specify SameSite=None and Secure if the cookie should be sent in cross-site requests. This enables third-party use. -> Specify SameSite=Strict or SameSite=Lax if the cookie should not be sent in cross-site requests.
The provided anti-forgery token was meant for user “”, but the current user is “X”. The anti-forgery cookie token and form field token do not match. The required anti-forgery cookie “__RequestVerificationToken” is not present.
Is the session token equal to the anti forgery Cookie?
Long story short: For anti-forgery validation to pass, the security token of the session token must be equal to the security token of the field token. I saw different names for these cookies in different sources.
Why is my IIS server sending me an anti forgery token?
IIS server associates this token with current user’s identity before sending it to the client These are some of the anti-forgery token related error messages you may see in Event Viewer: The provided anti-forgery token was meant for a different claims-based user than the current user.
Why is my anti forgery token not working?
These are some of the anti-forgery token related error messages you may see in Event Viewer: The provided anti-forgery token was meant for a different claims-based user than the current user. The provided anti-forgery token was meant for user “”, but the current user is “X”.