In regards to secure coding practices, why is input validation important?

Buffer overflow attacks occur when an attacker supplies more input data than a buffer can hold, overwriting adjacent memory. Input validation enforces constraints on data length and type before it is processed, ensuring the program never writes beyond allocated buffer boundaries and neutralizing this attack vector.

Code readability is a software quality concern addressed through naming conventions and comments, not through input validation logic.

Application configuration baselines define secure default settings and are managed through configuration management, not input validation routines.

Gray box testing is a testing methodology where the tester has partial knowledge of the system internals; it is not a standard that input validation is intended to satisfy.