Lab 301 — VaultLine — 2FA Bypass via Rate Limit Evasion

hackadvisor

Task: banking platform with 2FA using 3-digit OTP, rate limiter tracks attempts by request_id parameter. Solution: send empty request_id to bypass rate limiting while session maintains valid 2FA state, brute-force all 1000 OTP combinations.

authentication_bypass api_security rate_limiting session_management 2fa_bypass banking_platform otp_bruteforce

parameter_manipulationrate_limit_evasionotp_bruteforcesession_state_abuseempty_parameter_bypass

$ ls tags/ techniques/

authentication_bypass api_security rate_limiting session_management 2fa_bypass banking_platform otp_bruteforce

parameter_manipulationrate_limit_evasionotp_bruteforcesession_state_abuseempty_parameter_bypass

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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