3 ms·
I think it's ultimately about bypassing a TOTP 2FA by exploiting a race condition in the authentication failure backoff timer to submit thousands of possible co
by jandrese 2y ago
I think it's ultimately about bypassing a TOTP 2FA by exploiting a race condition in the authentication failure backoff timer to submit thousands of possible codes simultaneously. The technique is about abusing the TCP stack and IP fragmentation to load up the stack on the server with as much data as possible before hitting it with a "go" packet that completes the fragments on the head of line blocking data buffer and spills all of the contents into the webserver before a single RTT can be completed.