CVE-2021-3560 PoC — polkit 代码问题漏洞

Description

This is an exercise built around CVE-2021-3560

Readme

# 🛡️ CVE-2021-3560 Privilege Escalation Exercise

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  <img width="411" alt="ss-icon" src="https://github.com/user-attachments/assets/f61d1fbc-abae-4fc9-ac7a-ee9d2be20a9b" />
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## 📚 Overview

This repository contains materials for a hands-on cybersecurity exercise centered on **CVE-2021-3560**, a privilege escalation vulnerability in **polkit**.  
Discovered by GitHub Security Lab in 2021, this flaw allowed unprivileged Linux users to gain root access by exploiting a **race condition** in user credential handling.  
The vulnerability affected multiple Linux distributions and was patched in mid-2021.

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## 🎮 Scenario: *"Sidewinder Swifty's Silent Escalation"*

You are **Sidewinder Swifty** — a sly cyber-infiltrator known for slipping past digital defenses. You've gained low-level access to a target Ubuntu 20.04 machine. Your mission:

- Exploit CVE-2021-3560  
- Escalate privileges to root  
- Maintain access and **leave no trace**

> ⚠️ Precision and timing are key. Success depends on your ability to emulate real-world attacker tradecraft.

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## 🧠 Learning Objectives

This exercise will guide you through practical offensive security concepts, including:

- 🔼 **Privilege Escalation** – Gaining unauthorized administrative access  
- ⏱️ **Race Conditions** – Exploiting timing-based flaws  
- 📖 **CVE Exploitation** – Leveraging public vulnerabilities  
- 🧬 **Persistence** – Maintaining access after compromise  
- 👤 **User Obfuscation** – Masking your identity and actions  
- 🎭 **Privilege Masquerading** – Posing as a legitimate system user  
- 🔁 **File Transfer** – Using `scp` and `netcat`  
- 📦 **Compression** – Archiving with `tar`  
- 🔍 **Sensitive File Access** – Reading protected system files  
- 🧾 **Log Manipulation** – Editing logs to cover your tracks  
- 🕵️ **Anti-Forensics** – Evading forensic analysis  
- 🧨 **Threat Actor Simulation** – Reproducing attacker TTPs (Tactics, Techniques, Procedures)

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## 🎯 Expected Outcomes

By completing this challenge, you will:

- Gain hands-on experience exploiting **privilege escalation vulnerabilities**  
- Understand the **importance of secure permissions and patch management**  
- Practice **realistic post-exploitation tactics**  
- Learn how attackers **maintain stealth and persistence**  
- See firsthand why **timely system updates** are critical for defense

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## ⚠️ Disclaimer

> This project is intended for **educational and ethical research purposes only**.  
> Do **not** use these techniques on systems you do not own or have explicit permission to test.

> **Do not** use these techniques on any system you do not own or have explicit permission to test. Unauthorized access is illegal and unethical.

[Watch the demo on YouTube](https://www.youtube.com/watch?v=xLK27EJkNv0)

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