Null Byte Injection

A web security attack that manipulates input to bypass application filters.

Understanding:

Null byte injection is an attack technique where an attacker inserts a null byte (\x00) into user input to manipulate web applications and bypass security mechanisms, often leading to file inclusion vulnerabilities.

Common Applications and Use Cases:

Used to bypass file upload restrictions in web applications.
Exploited in local and remote file inclusion (LFI/RFI) attacks.
Leveraged in input validation bypasses to manipulate application behavior.

Best Practices and Security Considerations:

Implement strict input validation and sanitization.
Use parameterized queries to prevent null byte injections.
Regularly update web application firewalls (WAFs) to detect injection attempts.