Bandit Level 28 Walkthrough

Level 27 ➔ Level 28: Introduction to Git Repositories

1. My Objective

I am currently logged in as bandit27. My mission is to retrieve the password for the next level from a Git repository located on the OverTheWire server. The instructions provide me with a specific URL: ssh://bandit27-git@bandit.labs.overthewire.org/home/bandit27-git/repo. I need to copy (clone) this repository to my workspace and search through its files for the password.

The Technical Shift: Unlike previous levels where I found files directly on the server, I am now acting as a developer. I am pulling code from a remote source to look at it locally. This requires me to understand the Git Clone process.

2. The Feynman Explanation: The Shared Library

What is Git, and what does it mean to "clone" something? I use a simple analogy to explain this concept.

The Master Manuscript Analogy:

Imagine there is a rare, ancient book (the Repository) kept in a high-security vault in a different city. This book contains many pages of notes and secrets.

I want to study this book, but the guards won't let me take the original copy home. However, they allow me to make an exact photocopy (Git Clone) of every single page and take that photocopy back to my own house.

Once I am home, I can flip through the pages, read the notes, and find the secret codes. The "Original" book stays safe in the vault, but I now have a perfect replica on my desk to work with. In Linux, git clone is the "photocopy machine" that brings remote code to my fingertips.

3. Practical Solution

I will create a temporary directory in /tmp to store my "photocopy" of the repository, then I will clone it and find the password.

# Step 1: Create a workspace and enter it
bandit27@bandit:~$ mkdir /tmp/pritom_git
bandit27@bandit:~$ cd /tmp/pritom_git

# Step 2: Clone the remote repository
# I use the URL from the mission description. Use port 2220.
bandit27@bandit:/tmp/pritom_git$ git clone ssh://bandit27-git@bandit.labs.overthewire.org:2220/home/bandit27-git/repo

# Step 3: Enter the new 'repo' folder and check its contents
bandit27@bandit:/tmp/pritom_git$ cd repo
bandit27@bandit:/tmp/pritom_git/repo$ ls
README

# Step 4: Read the README file to find the password
bandit27@bandit:/tmp/pritom_git/repo$ cat README
The password to bandit28 is AV64Ng6pE6vSAr4S019SAb36906sV...

Why did I use /tmp?

In most Bandit levels, my home directory is read-only. Since git clone creates a new folder and downloads files, I must do this in /tmp where I have permission to write data. I always use a unique folder name (like pritom_git) so I don't accidentally conflict with other players.

🚀 My Pro Tips: Working with Repositories

✨ The Hidden .git Directory

When I clone a repo, Git creates a hidden folder called .git inside the project. This folder is the "Brain" of the repository. It stores every change ever made to every file. If the password isn't in the current files, it might be hidden in the history inside that folder!

⭐ SSH URL Syntax

Notice the format: user@host:port/path. If I forget the port :2220, Git will try the default port 22 and the connection will time out. Always be precise with the network address.

🔍 Git Log

If I wanted to see who wrote the README or when it was changed, I would use the command git log. It shows a timeline of all the "Photocopies" (commits) made to this book over time.

4. Why this matters

I use Git every single day as a developer and security researcher. It is the industry standard for managing code. In the world of security, attackers often search public Git repositories (like GitHub) for "leaked secrets"—passwords or API keys that developers accidentally left in their code. Learning how to navigate a repo is the first step in finding (or preventing) these leaks.

Repo Cloned!

I've successfully retrieved the password from the repository. I'll save it and move on to Level 28 ➔ Level 29, where the secret might be hidden deeper in the Git history!

Tags: #Linux #Bandit #OverTheWire #Git #GitClone #VersionControl #Repositories #CyberSecurity #FeynmanTechnique #CodeWithPritom #ProTips