Demo_CVE-2025-3248 — Educational PoC

Purpose: Simulate the vulnerability (CVE-2025-3248) in an isolated environment for information security learning: build a lab, observe exploitable behavior, and discuss mitigation measures.

⚠️ LEGAL & ETHICAL DISCLAIMER (ETHICAL USE ONLY)

• All content in this repository is for academic/research purposes only.
• Absolutely do not use the source code/techniques provided to interfere with systems you do not own or without written permission.
• The author/contributors are not responsible for any consequences resulting from misuse.
• By using this repository, you agree to the above terms.

Table of Contents

• Introduction
• Lab Architecture
• Repository Contents
• System Requirements
• Quick Start
  • A. Build the lab with Docker
  • B. Install PoC dependencies
  • C. Run the PoC on the local lab
• Configuration Customization
• Cleanup
• Defense / Mitigation Notes
• Troubleshooting
• Suggested Learning Path
• License
• Reiterating the Ethical Use Commitment

Introduction

This repository provides:

• A vulnerable demo service running in Docker (default port 7860).
• PoC code (exploit.py) to send requests demonstrating exploitation only within your lab.
• Documentation for setting up the environment, running tests, observing, and trying defensive measures.

Lab Architecture

• All testing is performed on your machine or lab network that you control.
• Do not expose this service to the internet.

Repository Contents

• docker-compose.yml — Builds the vulnerable demo application container.
• exploit.py — PoC client demonstrating the trigger of the flaw (lab use only).
• LICENSE — Usage license.
• README.md — The documentation you are reading.

System Requirements

• Docker and Docker Compose (plugin).
• Python 3.10+ and pip (to run the PoC).
• Permission to run Docker (sudo on Linux or a user in the docker group).

Quick Start

A. Build the lab with Docker

git clone https://github.com/Kiraly07/Demo_CVE-2025-3248.git
cd Demo_CVE-2025-3248

# Start the demo service (run in background)
docker compose up -d

# Check the container
docker compose ps

# View logs when needed
docker compose logs -f

B. Install PoC dependencies

python -m venv venv
# Linux/macOS
source venv/bin/activate
# Windows PowerShell
# .\venv\Scripts\Activate.ps1

pip install --upgrade pip
pip install requests colorama argparse

(Optional) create requirements.txt:

requests
colorama
argparse

C. Run the PoC on the local lab

# Basic example
python exploit.py -u http://[TARGET]:7860
 

Important note: Only point --url to your localhost/lab machine. Do not target anything outside the permitted scope.

Configuration Customization

• Service port: Adjust the ports: section in docker-compose.yml.
• Docker network: You can add a separate network to isolate the container (recommended in complex labs).
• Reverse proxy: If needed, place behind Nginx and only expose locally (127.0.0.1 or internal network).

Cleanup

# Stop & remove containers/volumes
docker compose down -v

# (Optional) Remove venv
deactivate 2>/dev/null || true
rm -rf venv

Defense / Mitigation Notes

• Update software to patched versions when official announcements are available.
• Limit the attack surface: only open necessary ports; place behind a reverse proxy with authentication.
• Principle of least privilege for containers:
  • Run as a non-privileged user.
  • Restrict capabilities, enable read-only root FS if possible.
  • Separate networks, do not mount sensitive disks.
• Monitoring & logging: enable access logs; watch for suspicious patterns; early warning.
• WAF/IDS/IPS: apply where appropriate; always perform input validation.

Troubleshooting

• Port 7860 is busy: change the port mapping (e.g., 8080:7860) in docker-compose.yml.
• Container fails to start: check logs with docker compose logs -f.
• Missing Docker permissions: use sudo or add the user to the docker group.
• Python package installation errors: update pip and check internal proxy/firewall.

Suggested Learning Path

• Read docker-compose.yml to understand the attack surface/dependencies.
• Run the PoC against the local lab, record the HTTP request/response.
• Try mitigation measures, re-test the PoC to evaluate effectiveness.
• Write a report: root cause, exploitation chain, impact, and recommendations.

License

• See the LICENSE file at the repository root.

Reiterating the Ethical Use Commitment

This repository was created for learning purposes only. Do not use it for unauthorized purposes. Always obtain explicit permission before performing security testing on any system you do not own.