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ISC2 Certified Secure Software Lifecycle Professional (CSSLP) Practice Question

During a black-box penetration test of a RESTful web service, you discover that its search endpoint passes the cat query-string parameter directly to an outdated data-access library recently reported vulnerable to SQL injection. Which single test request would most convincingly prove the flaw is exploitable in the running environment?

  • Inject a time-based blind payload like ' OR IF(1=1,SLEEP(5),0)-- and watch for a noticeable response delay.

  • Review the application's JavaScript files to see if the cat parameter is validated on the client side.

  • Add a single apostrophe (') to the cat parameter and observe whether the server returns an SQL syntax error.

  • Append a UNION SELECT payload such as union select null,'pwned',null-- to the cat parameter and look for the string pwned in the response.

ISC2 Certified Secure Software Lifecycle Professional (CSSLP)
Secure Software Testing
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