Hacking Games Bandit Level 20 to 21 Walkthrough
#ctf #cybersecurity #ethicalhacking
In this video, I solve Bandit Level 20 → Level 21 from OverTheWire — a challenge that combines setuid execution with local network communication.
The task: run a setuid binary that connects to a specified port on localhost, sends the previous level’s password, and receives the next one if the password is correct. I walk through how to:
Use nc (netcat) to create a local listener daemon
Send the correct password from bandit20 to the binary
Receive and extract the password for bandit21
This level teaches you how to simulate client-server interactions locally and control process flow in Linux — a powerful combo for CTFs and real-world pentesting.
Let’s keep hacking the path.
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#Bandit #OverTheWire #CTFChallenge #CyberSecurity #Linux #Netcat #Setuid #EthicalHacking #InfoSec #HackThePath #LearningJourney #CaptureTheFlag #CyberSkills #CTFWalkthrough #LocalServer #ProcessControl