Mongo Vulnub Lab...Try to Hack IT.....!CTF Challenge - Mongoose RCE (CVE-2024-53900)
Challenge Overview
This Capture The Flag (CTF) challenge is based on CVE-2024-53900, a vulnerability in Mongoose that allows Remote Code Execution (RCE) due to improper use of the `$where` operator in MongoDB queries.
Your objective is to exploit this vulnerability and retrieve the flag hidden inside the application!
Setup Instructions
1 Install Dependencies
Make sure you have Node.js installed, then run:
```sh
npm install
```
2 Configure MongoDB
Install MongoDB and ensure it is running.
Create a .env file in the root directory with the following:
```sh
MONGO_URI=mongodb://localhost:27017/ctf_db
```
3 Start the Server
Run the vulnerable Express server:
```sh
node server.js
```
The server will start at: http://localhost:3000
Challenge Objective
Your goal is to bypass authentication and extract the flag from the vulnerable endpoint.
Vulnerable Endpoint:
POST /login
The application uses an insecure MongoDB `$where` query, making it vulnerable to NoSQL injection & RCE.
Exploitation Hint:
Try NoSQL injection payloads to manipulate the query.
Inject JavaScript code into the `$where` condition.
Retrieve the flag hidden inside the response.
Directory Structure
```sh
│── public/ Frontend assets
│ ├── index.html CTF challenge UI
│ ├── style.css Styling for the challenge
│ └── script.js JavaScript for login request
│── .env Environment variables (MongoDB URI)
│── server.js Vulnerable Express.js server
│── package.json Dependencies & scripts
│── package-lock.json Lock file for dependencies
└── README.md Challenge guide (this file)
```
Winning Condition
If you successfully exploit the vulnerability, you will get the response:
Login Successful! Here is your flag: FLAG{*****_***_****}
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