Does ViewState protect CSRF?

The ASP.NET ViewState contains a property, ViewStateUserKey, which offers protection against CSRF by adding uniqueness to the ViewState MAC as long as you set it to a new value for every session.

Does SameSite prevent CSRF?

Yes, it looks like the SameSite cookie attribute is an effective security measure against CSRF attacks. You can avoid sending your cookies with the request initiated by third parties by using this feature.

What is an anti-CSRF token?

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.

Is Cors enough for CSRF?

No. The Same Origin Policy (which CORS allows you to punch selective holes through) prevents third party sites from masquerading as a user in order to read (private) data from another site.

What is the result of CSRF attacks?

A successful CSRF attack can be devastating for both the business and user. It can result in damaged client relationships, unauthorized fund transfers, changed passwords and data theft—including stolen session cookies.

Why was CSRF removed from Owasp top10?

Same as the “A10-Unvalidated Redirects and Forwards” category, the “A8 – Cross-Site Request Forgery (CSRF)” category was removed from the OWASP Top 10 2017 list, as the statistical data was not strong enough to justify its place.

Is SameSite cookie enough to prevent CSRF?

For the reasons described, it is not recommended to rely solely on SameSite cookies as a defense against CSRF attacks. Used in conjunction with CSRF tokens, however, SameSite cookies can provide an additional layer of defense that might mitigate any defects in the token-based defenses.

Is SameSite strict enough?

SameSite=strict is supported in almost all fairly recent browsers as seen here, but note the exception of IE11. Not many people use IE11 anymore, but for them it will not be good enough.

Is CSRF needed for REST API?

This use of cookies doesn’t directly violate the statelessness requirement of REST because the server still isn’t tracking client-side state. Either way, the overall answer is simple: if you are using cookies (or other authentication methods that the browser can do automatically) then you need CSRF protection.

How can I get CSRF token value?

To fetch a CRSF token, the app must send a request header called X-CSRF-Token with the value fetch in this call. The server generates a token, stores it in the user’s session table, and sends the value in the X-CSRF-Token HTTP response header.

Can you fake CORS?

The Access-Control-Allow-Origin header in CORS only dictates which origins should be allowed to make cross-origin requests. Don’t rely on it for anything more. TLDR: There’s nothing stopping malicious code from spoofing the origin. When that happens, your server will never know about it and will act upon the requests.

What is the difference between XSS and CSRF?

What is the difference between XSS and CSRF? Cross-site scripting (or XSS) allows an attacker to execute arbitrary JavaScript within the browser of a victim user. Cross-site request forgery (or CSRF) allows an attacker to induce a victim user to perform actions that they do not intend to.

How does VIEWSTATE protect against CSRF [ infographic ]?

If you enable the ViewStateUserKey, then the server will protect the integrity of the view state by appending a random, unguessable checksum. This checksum acts much like a random CSRF token. In particular, ViewStateUserKey will compute a Message Authentication Code (MAC) on the view state fields.

How to protect your site from VIEWSTATE vulnerability?

If your Web site authenticates users, you can set the ViewStateUserKey property in the Page_Init event handler to associate the page’s view state with a specific user. This helps prevent one-click attacks, in which a malicious user creates a valid, pre-filled Web page with view state from a previously created page.

How does CSRF protect against a malicious request?

This is what provides the CSRF protection. You are absolutely correct that when the malicious request is submitted, it will be submitted with your cookie, which will have your anti-forgery token, and this will be set to the ViewStateUserKey value. However, what you’re not seeing, is that this is being compared to the form value that was submitted.

What happens when the viewstateuserkey property is set?

When the ViewStateUserKey property is set, the attacker’s identity is used to create the hash of the view state of the original page. When the victim is lured into resending the page, the hash values will be different because the user keys are different. The page will fail verification and an exception will be thrown.