Request Parsing

HTTP Smuggling: A Trust Crisis Triggered by ‘Parsing Differences’

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Introduction: The Invisible “Layer” In modern web architecture, an HTTP request from a user often passes through multiple checkpoints before reaching the actual business logic (backend server): CDN, load balancer, WAF, reverse proxy… We can imagine this model as a tightly secured building: Frontend Proxy (e.g., Nginx, CDN): This is your building’s “security guard”. He … Read more

HTTP Smuggling: Understanding the Attack Techniques and Detection Methods

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HTTP Smuggling: Understanding the Attack Techniques and Detection Methods

Question: Is HTTP smuggling only applicable to HTTP and not HTTPS? HTTP smuggling is not limited to HTTP; it can also be applied to HTTPS. HTTP smuggling is an attack technique that exploits the differences in how front-end servers and back-end servers parse HTTP requests. By cleverly constructing requests, attackers can confuse the server when … Read more