Hasty Treat - CSRF Explained

In this Hasty Treat, Scott and Wes talk about CSRF (Cross Site Request Forgery)!

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Show Notes

05:40 - What is it?

• https://cheatsheetseries.owasp.org/cheatsheets/Cross-Site_Request_Forgery_Prevention_Cheat_Sheet.html#samesite-cookie-attribute
• Someone can submit a form FROM or TO your domain, automatically.

07:50 - Solutions

• SameSite Cookie
• https://medium.com/swlh/secure-httponly-samesite-http-cookies-attributes-and-set-cookie-explained-fc3c753dfeb6
  • Lax — Default value in modern browsers. Cookies are allowed to be sent with top-level navigations and will be sent along with GET requests initiated by a third party website. The cookie is withheld on cross-site subrequests, such as calls to load images or frames, but is sent when a user navigates to the URL from an external site, such as by following a link.
  • Strict — As the name suggests, this is the option in which the Same-Site rule is applied strictly. Cookies will only be sent in a first-party context and not be sent along with requests initiated by third party websites. The browser sends the cookie only for same-site requests (that is, requests originating from the same site that set the cookie). If the request originated from a different URL than the current one, no cookies with the SameSite=Strict attribute are sent.
  • None — Cookies will be sent in all contexts, i.e sending cross-origin is allowed. The browser sends the cookie with both cross-site and same-site requests.
• CSRF Token
• Check Origin / Referrer Headers
• Captcha
• Ask for Password
• Token

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