BYPASSING MODERN WAF ARCHITECTURES

Web Application Firewalls (WAFs) are a critical layer of defense, but they are not infallible. In this post, we explore the techniques used by advanced persistent threats to bypass modern WAF architectures.

Evasion Techniques

1. Protocol Level Evasion: Manipulating HTTP headers and chunked encoding to confuse the WAF parser.
2. Payload Obfuscation: Using complex encoding schemes to hide malicious payloads from signature-based detection.
3. Logic Flaws: Exploiting discrepancies between how the WAF parses a request and how the backend server processes it.

Note: This information is provided for educational purposes to help defenders secure their applications.