A Penetration Tester Was Able to Enter an SQL Injection

Multiple Choice

A penetration tester was able to enter an SQL injection command into a text box and gain access to the information store on the database. Which of the following is the BEST recommendation that would mitigate the vulnerability?

A) Randomize the credentials used to log in.
B) Install host-based intrusion detection.
C) Implement input normalization.
D) Perform system hardening.