Which of the following BEST describes a SQL Injection attack?

A.
The attacker attempts to have the receiving server pass information to a back-end database
from which it can compromise the stored information.

B.
The attacker attempts to have the receiving server run a payload using programming commonly
found on web servers.

C.
The attacker overwhelms a system or application, causing it to crash and bring the server down
to cause an outage.

D.
The attacker overwhelms a system or application, causing it to crash, and then redirects the
memory address to read from a location holding the payload.

Explanation:
SQL injection is a code injection technique, used to attack data-driven applications, in which
malicious SQL statements are inserted into an entry field for execution (e.g. to dump the database
contents to the attacker). SQL injection must exploit a security vulnerability in an application’s
software, for example, when user input is either incorrectly filtered for string literal escape
characters embedded in SQL statements or user input is not strongly typed and unexpectedly
executed. SQL injection is mostly known as an attack vector for websites but can be used to
attack any type of SQL database.