Vulnerability to bypass two-factor authentication with remember-me option

Bundle version: 4.10.0 Symfony version: 3.4.31 Description Bypass 2fa by rememberme cookie To Reproduce We have a login form with rememberme checkbox functionality, When using the checkbox, symfony creates a cookie "REMEMBERME". That moment we get redirected to the 2fa-auth page. We have no acces...

Timing attack vector for remember me token

The current rememberme token verification process leaves the application open to a timing attack. Since the default is for the token to be stored as a cookie and for cookies to be encrypted, an attacker would have to know the application secret to exploit this. However, should a custom guard be...