SQL injection remains one of the most dangerous and common web vulnerabilities, allowing attackers to manipulate database queries and access sensitive data.
What is SQL Injection?
SQL injection (SQLi) is a code injection technique that exploits vulnerabilities in applications that construct SQL queries using untrusted input.
When successful, attackers can read, modify, or delete database contents, execute administrative operations, and even compromise the underlying server.
Types of SQL Injection
In-band SQLi
The attacker uses the same communication channel to launch the attack and gather results. Most common and easiest to exploit.
Blind SQLi
No error messages or data returned. Attackers infer information by observing application behavior.
Out-of-band SQLi
Uses different channels (like DNS or HTTP requests) to exfiltrate data when in-band methods fail.
Prevention Techniques
- Parameterized Queries - Use prepared statements with bound parameters instead of string concatenation.
- Input Validation - Validate and sanitize all user input before processing.
- WAF Protection - Deploy a Web Application Firewall to detect and block SQLi attempts.
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Conclusion
SQL injection remains a critical threat to web applications. By using parameterized queries, validating input, and deploying WAF protection with Fraudcache threat feeds, you can significantly reduce your exposure to SQLi attacks.