May 2018
Intermediate to advanced
326 pages
8h 32m
English
SQL Injection is one of the oldest and most widely used application layer vulnerabilities used by attackers to steal valuable data from SQL based databases. Attackers leverage an SQL Injection vulnerability to bypass a web application's authentication system and to retrieve information. SQL Injection can also be used to make changes like adding, deleting, and modifying data records. The following diagram shows a 3-Tier application architecture:

The 3-Tier application has the following components:
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