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Mohammed Fazuluddin
 Introduction
 What is SQL Injection?
 How Does SQL Injection Work?
 Types of SQL Injection Attacks
 Real-World Impact of SQL Injection
 How to Prevent SQL Injection
TOPICS
Introduction
• In today's data-driven world, websites and
applications rely heavily on databases to store
information.
• SQL Injection (SQLi) is a critical security
vulnerability that can exploit weaknesses in
these systems.
• This presentation will provide an in-depth look
at SQLi, its different forms, how it works, and
how to prevent it.
What is SQL Injection?
• SQLi is a code injection attack that targets
applications that use SQL (Structured Query
Language) to communicate with databases.
• Attackers inject malicious SQL code into user inputs,
altering the intended behavior of the SQL statement.
• This can lead to unauthorized access, data theft, or
even complete control of the database.
How Does SQL Injection Work?
• Attackers identify vulnerable input fields in
web forms, search bars, or login credentials.
• They craft malicious SQL code disguised as
user input to exploit weaknesses in the
application's code.
• The application processes the user input,
unknowingly executing the attacker's
embedded SQL code.
• This code can then manipulate the database
in unintended ways.
Types of SQL Injection Attacks
• Error-based SQLi: Attackers use code to
generate database errors, revealing
information about the database structure.
• Union-based SQLi: Malicious code combines
user input with another SQL query to
retrieve unauthorized data.
• Blind SQLi: Attackers use the application's
response (success/failure) to infer
information about the database content.
• Boolean-based SQLi: Similar to blind SQLi,
attackers exploit the application's true/false
responses to extract data one bit at a time.
Real-World Impact of SQL Injection
• SQLi has been responsible for some of the
biggest data breaches in history.
• Attackers can steal sensitive information like
usernames, passwords, credit card numbers,
and personal data.
• This can lead to identity theft, financial loss,
and reputational damage for organizations.
How to Prevent SQL Injection
• Input Validation: Sanitize all user input to remove
potentially harmful characters and commands.
• Parameterized Queries: Use prepared statements
with placeholders for user input, preventing
malicious code from being injected.
• Stored Procedures: Pre-defined SQL statements
stored on the database server, reducing the risk of
user-controlled queries.
• Database User Permissions: Grant database users
only the minimum permissions required for their
tasks.
THANKS

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SQL Injection Introduction and Prevention

  • 2.  Introduction  What is SQL Injection?  How Does SQL Injection Work?  Types of SQL Injection Attacks  Real-World Impact of SQL Injection  How to Prevent SQL Injection TOPICS
  • 3. Introduction • In today's data-driven world, websites and applications rely heavily on databases to store information. • SQL Injection (SQLi) is a critical security vulnerability that can exploit weaknesses in these systems. • This presentation will provide an in-depth look at SQLi, its different forms, how it works, and how to prevent it.
  • 4. What is SQL Injection? • SQLi is a code injection attack that targets applications that use SQL (Structured Query Language) to communicate with databases. • Attackers inject malicious SQL code into user inputs, altering the intended behavior of the SQL statement. • This can lead to unauthorized access, data theft, or even complete control of the database.
  • 5. How Does SQL Injection Work? • Attackers identify vulnerable input fields in web forms, search bars, or login credentials. • They craft malicious SQL code disguised as user input to exploit weaknesses in the application's code. • The application processes the user input, unknowingly executing the attacker's embedded SQL code. • This code can then manipulate the database in unintended ways.
  • 6. Types of SQL Injection Attacks • Error-based SQLi: Attackers use code to generate database errors, revealing information about the database structure. • Union-based SQLi: Malicious code combines user input with another SQL query to retrieve unauthorized data. • Blind SQLi: Attackers use the application's response (success/failure) to infer information about the database content. • Boolean-based SQLi: Similar to blind SQLi, attackers exploit the application's true/false responses to extract data one bit at a time.
  • 7. Real-World Impact of SQL Injection • SQLi has been responsible for some of the biggest data breaches in history. • Attackers can steal sensitive information like usernames, passwords, credit card numbers, and personal data. • This can lead to identity theft, financial loss, and reputational damage for organizations.
  • 8. How to Prevent SQL Injection • Input Validation: Sanitize all user input to remove potentially harmful characters and commands. • Parameterized Queries: Use prepared statements with placeholders for user input, preventing malicious code from being injected. • Stored Procedures: Pre-defined SQL statements stored on the database server, reducing the risk of user-controlled queries. • Database User Permissions: Grant database users only the minimum permissions required for their tasks.