Labs / HTTP Smuggling
- Daily Challenge
- Released 06 Oct 2025
Can you detect the hidden HTTP request lurking in plain sight?
Deep within seemingly normal web traffic, a malicious request hides in the shadows, exploiting how servers disagree on HTTP boundaries. This sneaky technique has compromised major websites and bypassed enterprise security systems! Armed with network forensics skills and protocol knowledge, you'll uncover how attackers manipulate HTTP headers to smuggle unauthorized requests past security controls. Time to expose this invisible threat!
Start Lab Environment
Launch your dedicated AWS machine to begin hacking
HTTP Request Smuggling Analysis
HTTP request smuggling is a critical web security vulnerability that occurs when front-end and back-end servers disagree on where one request ends and another begins. This technique allows attackers to bypass security controls, gain unauthorized access, and poison application caches.
What You'll Learn
- Understanding HTTP request smuggling vulnerabilities
- Analyzing Content-Length and Transfer-Encoding headers
- Identifying CL.TE and TE.CL discrepancies
- Detecting malicious request patterns
- HTTP protocol manipulation techniques
- Network traffic forensics
Challenge Overview
You've been provided with a packet capture file containing suspicious HTTP traffic. A security researcher discovered what appears to be an HTTP request smuggling attack targeting a web application. Your task is to analyze the captured traffic, identify the smuggled request, and extract the hidden administrative command that reveals sensitive information.