CompTIA Security+ Question A-46

One of the most consistently reported software security vulnerabilities that leads to major exploits is:

A. Lack of malware detection.
B. Attack surface decrease.
C. Inadequate network hardening.
D. Poor input validation.

Answer: D

D: With coding there are standards that should be observed. Of these standards the most fundamental is input validation. Attacks such as SQL injection depend on unfiltered input being sent through a web application. This makes for a software vulnerability that can be exploited. There are two primary ways to do input validation: client-side validation and server-side validation. Thus with poor input validation you increase your risk with regard to exposure to major software exploits.