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NodeJS Recon: Basics

linux-security-recon-webservers | Level: Easy  | Total Lab Runs: 0 | Premium Lab

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

      Questions

      1. Find the port used by NodeJS web server and debugger. 
      2. What content is returned when a query is made to the base directory of the target server? 
      3. The server will reveal a flag when request is made for a specific directory path (e.g. http://<target_ip>/hello). There are two such flags. Retrieve both flags. The directories are present in this directory list: /usr/share/metasploit-framework/data/wordlists/directory.txt 
      4. The server will reveal the flag when a request is made from a specific browser to “/secret” directory. Retrieve the flag.
      5. Find the name of main app file used by the NodeJS web server.
      6. List the number of scripts loaded (including node-internals) on the NodeJS web server using node-inspect.
      7. A breakpoint is set in the main app file. Trigger the breakpoint and use node-inspect debugger to view the source code of the main app file. The source contains a “Hidden Flag”. Retrieve the flag.

      Instructions: 

      • 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


      Verify:
      1. The server will reveal the flag when a request is made from a specific browser to “/secret” directory. Retrieve the flag:
       
      2. A breakpoint is set in the main app file. Trigger the breakpoint and use node-inspect debugger to view the source code of the main app file. The source contains a “Hidden Flag”. Retrieve the flag:
       

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