Lab 62 — NimbusDash — 2FA Bypass via Premature Session Establishment

hackadvisor

Task: cloud monitoring platform with mandatory 2FA using TOTP. Solution: bypass 2FA by using the session cookie from a failed OTP verification response, which grants full authentication despite the 403 error.

nodejs authentication_bypass credential_leak cookie_manipulation html_comments express session_management 2fa_bypass totp

http_header_inspectionpremature_session_establishmentset_cookie_analysisauthentication_flow_bypass

$ ls tags/ techniques/

nodejs authentication_bypass credential_leak cookie_manipulation html_comments express session_management 2fa_bypass totp

http_header_inspectionpremature_session_establishmentset_cookie_analysisauthentication_flow_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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