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NodeJS: Express Basics

recon-webserver | Level: Easy  | Total Lab Runs: 0 | Premium Lab

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Lab Walkthrough Video:

In this challenge we will look at the basics of NodeJS Express server. Please start the lab and answer the following questions:


    1. Which nmap command we can use to verify that the express middleware is deployed on the target server?
    2. What content is returned when a query is made to the base directory of the target server? 
    3. Find all the endpoints (Directory paths) served by the web server.
      The directories are present in this directory list: /usr/share/metasploit-framework/data/wordlists/directory.txt
    4. Useragent based restriction has been implemented using express-useragent module on “/secret”. Bypass the restriction with agent "mobile" and retrieve the flag.
    5. Retrieve the flag from “/flag” endpoint.


    • This lab is dedicated to you! No other users are on this network :) 
    • Once you start the lab, you will have access to a root terminal of a Kali instance
    • Your Kali has an interface with IP address 192.X.Y.Z. Run "ip addr" to know the values of X and Y.
    • The Target machine should be located at the IP address 192.X.Y.3. 
    • Do not attack the gateway located at IP address 192.X.Y.1

    1. Useragent based restriction has been implemented using express-useragent module on “/secret”. Bypass the restriction with agent “mobile” and retrieve the flag:
    2. Retrieve the flag from “/flag” endpoint:

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