About RFI (Remote File Inclusion)
RFI vulnerabilities occur when an attacker can include remote files that get executed on the server. This happens when user input is directly used in file inclusion functions without proper validation.
Common RFI Attack Types
Basic RFI: Simple remote file inclusion using basic payloads
Filter Bypass: Bypassing security filters and WAFs
File Upload RFI: Exploiting RFI through file upload functionality
Advanced Techniques: Complex methods to bypass modern protections
RCE via RFI: Achieving remote code execution through file inclusion
Common Inclusion Functions
PHP: include(), require(), include_once(), require_once()
JSP: , <%@ include %>
ASP:
Python: exec(), eval(), import()
Node.js: require(), import()
Real-World Impact
Remote Code Execution (RCE) on the server
File system access and arbitrary file reading
Bypass authentication and authorization mechanisms
Data exfiltration and sensitive information disclosure
Server compromise and lateral movement
Compliance violations and security breaches