hunt-mfa-bypass

To detect MFA bypass vulnerabilities, you trace authentication flows to check for MFA enforcement at middleware or endpoint levels, verifying OTP entropy and rate limits. This identifies bypass patterns like token replay and backup code brute forcing.

Common two-factor authentication bypass patterns include lacking rate limits on OTP endpoints, OTP replay attacks, and brute forcing backup codes. Detection involves tracing these authentication flows to verify OTP entropy and middleware enforcement.

Checking if an OTP implementation is vulnerable to brute force attacks involves verifying rate limits on authentication endpoints and assessing OTP entropy. Validation ensures an attacker session cannot reach the post-MFA state without proper authorization.

You need prior knowledge of authentication flows and rate limits to effectively audit for auth bypass issues. Understanding these processes is required to trace enforcement at middleware or per-endpoint levels and validate post-MFA session states.

The best way to test backup code brute force vulnerabilities is to trace the authentication flow for backup code endpoints and verify rate limiting enforcement. This validates whether an attacker's session can improperly reach the post-MFA state.

MFA enforcement fails at the middleware level when authentication flows lack proper per-endpoint checks or rate limits. Auditing identifies these gaps by verifying OTP entropy and ensuring unauthorized sessions cannot reach the post-MFA state.