HTTP Smuggling Finally Explained - Part 1
Introduction
TLDR : Learn it. Huge impact and bonus style points.
If you work in offensive security, it is probable that you've already heard of HTTP Smuggling somewhere. Maybe you've heard of a new 0 day exploiting this type of vulnerability, or maybe you've seen a report of a bug bounty hunter dropping +10k$ with the help of HTTP Smuggling. And maybe after that, you did like me, you never digged into it.
Truth is, the impacts of HTTP Smuggling are huge. It's possible then to deface a website for other users, perform accounts take over and even perform SSRF (Server Side Request Forgery). Other impactful actions can be made when chaining with other vulnerabilities.
Thats why, I digged into it, finding how it works and how to exploit it. This blog series is more like a journal to me, something where I can write all the payloads needed and the theory behind it.

