Crucial Exams

Certified Ethical Hacker (CEH) Practice Question

During a web-app assessment, you intercept a bearer JWT taken from an Authorization header. You change the token's alg value from HS256 to none, delete the signature segment, and resend the request. The application still recognizes you as an administrator. Which specific session-management weakness should you document in your report?

  • The application neglects to enforce the exp claim, letting expired tokens remain valid

  • The implementation accepts the none algorithm, bypassing signature verification altogether

  • The server incorrectly treats an RS256 public key as an HS256 shared secret during verification

  • The JWT uses a weak shared secret that can be brute-forced offline

Certified Ethical Hacker (CEH)
Web Application Hacking
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