Depending on the user's credentials, the attacker can transfer funds, change a password, make an unauthorized purchase, elevate privileges for a target account, or take any action that the user is permitted to do. However, successful CSRF attacks can only exploit the capabilities exposed by the vulnerable application and the user's privileges. In effect, CSRF attacks make a target system perform attacker-specified functions via the victim's browser without the victim's knowledge (normally until after the unauthorized actions have been committed). Since browser requests automatically include all cookies including session cookies, this attack works unless proper authorization is used, which means that the target site's challenge-response mechanism does not verify the identity and authority of the requester. If a target user is authenticated to the site, unprotected target sites cannot distinguish between legitimate authorized requests and forged authenticated requests. Insecure Direct Object Reference PreventionĬross-Site Request Forgery Prevention Cheat Sheet ¶ Introduction ¶Ī Cross-Site Request Forgery (CSRF) attack occurs when a malicious web site, email, blog, instant message, or program tricks an authenticated user's web browser into performing an unwanted action on a trusted site. JavaScript: Automatically Including CSRF Tokens as an AJAX Request Header REFERENCE: Sample JEE Filter Demonstrating CSRF Protection

Possible CSRF Vulnerabilities in Login Forms Using Cookies with Host Prefixes to Identify Origins Identifying Source Origin (via Origin/Referer Header)Ĭhecking the Referer Header if Origin Header Is Not Present

Naive Double-Submit Cookie Pattern (DISCOURAGED)Įmploying Custom Request Headers for AJAX/APIĭealing with Client-Side CSRF Attacks (IMPORTANT) Pseudo-Code For Implementing HMAC CSRF Tokens

Signed Double-Submit Cookie (RECOMMENDED) Transmissing CSRF Tokens in Synchronized PatternsĪLTERNATIVE: Using A Double-Submit Cookie Pattern Use Built-In Or Existing CSRF Implementations for CSRF Protection

Angular 4 access control allow origin