SQL Injection Techniques

[Virtual Presenter] Welcome everyone! Today we will be exploring the various techniques hackers use to exploit vulnerabilities in databases that are not adequately protected from S-Q-L injection attacks. We will look at how these techniques work and the preventive measures that can be used to protect databases from these threats. Let's get started!.

[Audio] S-Q-L injection is a form of cyber attack that can gain access to important data stored in databases. It happens when malicious S-Q-L statements are sent to the database manipulating the queries that the application makes. This attack can be used to view modify or delete confidential information and the consequences can be severe if not taken steps to prevent it..

[Audio] S-Q-L injection is a form of hacking that exploits vulnerabilities in your database to gain access to your data. Error-based is the most commonly used technique and operates by returning errors when an illegal query is sent to the database. Union-based injection is when the hacker uses the union S-Q-L operator to combine the results of two queries into a single result. Blind S-Q-L injection is when the hacker tries to guess the structure and content of a database without actually having any visible error messages as a guide..

Error-based SQL Injection. Error-based SQL injection relies on generating errors in the database to retrieve information. Attackers intentionally cause errors to reveal details about the database structure..

[Audio] We will be exploring the Union-based S-Q-L Injection technique in this slide. This approach involves utilizing the union S-Q-L operator to bring together results from various select statements. This is a method that can be used by hackers to extract data from several database tables and it is important to have an understanding of how it works to prevent misuse..

Blind SQL Injection. Blind SQL injection does not reveal data directly through errors or results. Instead, attackers infer information by observing the application's behavior and responses to injected queries..

[Audio] S-Q-L injection attacks are a common form of attack frequently combining different techniques such as string concatenation comment insertion subqueries and timing attacks. Each of these methods has the potential to bypass web application security measures and can be even more dangerous when combined. To properly use these techniques we need to take a closer look at each of them. Let us begin..

String Concatenation. String concatenation involves injecting malicious strings into the SQL query. By adding or altering query strings, attackers can manipulate the database commands executed by the application..

Comment Insertion. Comment insertion uses SQL comments to truncate or alter parts of a query. Attackers add comments to bypass security measures or execute partial queries..

[Audio] Subqueries are an invaluable asset for S-Q-L database programming allowing multiple queries to be used within one query to achieve more complex results in a quicker fashion. Attackers may exploit subqueries to gain access to extra information or to modify the function of the main query. For example they could use subqueries to bypass authentication by having the main query return true without requiring valid approval. It is essential to comprehend the structure and utilisation of subqueries and to protect against any misuse..

[Audio] Timing attacks take advantage of the time needed for the database to answer different queries. To protect against this it is important to conduct regular security audits employ prepared statements and validate any input. We will explore these further in the following slide..

[Audio] Prepared statements and validation of user-provided input should be used as measures to prevent and mitigate against S-Q-L injection attacks. Additionally regular security audits should be performed to help identify any potential vulnerabilities. Adopting these best practices can help protect against malicious attacks..

[Audio] It is vitally important to understand the techniques used by hackers to exploit vulnerabilities with S-Q-L injection in order to protect our sensitive data. As teachers practitioners and I-T professionals it is important to be aware of this security issue and the various countermeasures that can be taken to protect our databases and the data that resides within them. Thank you for your time and attention..