Day 25 of 30 Day — 30 Vulnerabilities | HTTP Request Smuggling

Day 25: Mastering HTTP Request Smuggling — Essential Tricks & Techniques Based on Personal Experience and Valuable POCs

[ In collaboration with Abhijeet Kumawat ( LinkedIn | Twitter)]

Hey geeks, it4chis3c (Twitter) here with one more write-up on tricks & tips to detect Web Cache Poisoning Vulnerability.

Hey security enthusiasts, it4chis3c(Twitter) back with another deep dive into web security. Today, we’re dissecting HTTP Request Smuggling, a sophisticated attack vector that can have devastating effects on web applications. Let’s explore the essentials.

1. Brief Description

What is HTTP Request Smuggling?

HTTP Request Smuggling is a vulnerability that occurs when a web server or proxy processes HTTP requests incorrectly, leading to desynchronization between the front-end server and back-end server. This mismatch allows an attacker to “smuggle” a malicious request in a way that bypasses security controls.

How Does It Work?

The attack exploits discrepancies in how front-end and back-end servers interpret the boundaries of HTTP requests. By carefully crafting a request, an attacker can inject a second, malicious request that is “smuggled” to the…