SQL Injection (SQLi)

Summary

SQL Injection (SQLi) is a type of application attack where an attacker exploits vulnerabilities in a web application’s database query execution by injecting malicious SQL code. This allows unauthorized access to or manipulation of the database, potentially leading to data theft, data loss, or administrative control over the system.

Key Characteristics

• Exploitation of input fields to inject malicious SQL statements.
• Targets web applications that do not properly sanitize user inputs.
• Can lead to unauthorized data retrieval, modification, or deletion.
• May allow attackers to bypass authentication mechanisms.
• Often used to escalate privileges or execute administrative operations on the database.
• Commonly affects applications using dynamic SQL queries without parameterization.

Defensive Controls

• Implement input validation and sanitization to reject malicious inputs.
• Use prepared statements and parameterized queries to separate code from data.
• Employ stored procedures with controlled parameters.
• Enforce the principle of least privilege for database access.
• Regularly update and patch database management systems and web applications.
• Deploy web application firewalls (WAFs) to detect and block injection attempts.
• Conduct security testing, including code reviews and penetration testing.

Related Security Solutions

Security solutions related to SQL Injection include web application firewalls (WAFs), database activity monitoring (DAM) tools, secure coding frameworks, vulnerability scanners, and runtime application self-protection (RASP) technologies. These solutions help detect, prevent, and mitigate SQLi attacks by enforcing secure coding practices and monitoring suspicious database interactions.