ISC2 Certified Secure Software Lifecycle Professional (CSSLP) Practice Question
Your team is preparing security tests for a medical IoT device. To verify that secure boot halts when firmware is tampered with, you will flip random bits in the bootloader at run-time and monitor the device's reaction. Which failure-mode testing technique best fits this plan?
Deliberately corrupting code or data at run-time to observe how the system reacts is characteristic of fault injection. Fault injection introduces controlled faults-such as bit flips, invalid voltage levels, or corrupt pointers-to confirm the product detects and handles failures safely. Stress testing overloads resources for extended periods, fuzzing supplies malformed external inputs rather than altering internal state, and DAST analyzes running applications from the outside for vulnerabilities; none of these directly inject faults into the executing firmware as described.
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ISC2 Certified Secure Software Lifecycle Professional (CSSLP)
Secure Software Testing
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