Which term refers to a software design problem involving insufficient input validation?

Which term refers to a software design problem involving insufficient input validation?

• A. Insufficient input validation
• B. Phishing
• C. Pharming
• D. Dumpster diving

Answer: (A)

Insufficient input validation describes a software design flaw where data from users or external sources is accepted and processed without proper checks. When inputs aren’t validated for length, type, format, or content, attackers can craft data that exploits the program—causing crashes, logic errors, or unauthorized access. For example, without proper validation, a string expected to be a number could cause a crash or be used to manipulate a database query, leading to injection attacks. This concept centers on how a program handles and validates input, not on social engineering or physical data theft. Phishing and pharming relate to tricking users or manipulating DNS, while dumpster diving is about retrieving discarded data; these are different security concerns.

Insufficient input validation describes a software design flaw where data from users or external sources is accepted and processed without proper checks. When inputs aren’t validated for length, type, format, or content, attackers can craft data that exploits the program—causing crashes, logic errors, or unauthorized access. For example, without proper validation, a string expected to be a number could cause a crash or be used to manipulate a database query, leading to injection attacks. This concept centers on how a program handles and validates input, not on social engineering or physical data theft. Phishing and pharming relate to tricking users or manipulating DNS, while dumpster diving is about retrieving discarded data; these are different security concerns.