CVE-2021-3560 PoC — polkit 代码问题漏洞

Source

https://github.com/Antoine-MANTIS/POC-Bash-CVE-2021-3560

Associated Vulnerability

Title:polkit 代码问题漏洞 (CVE-2021-3560)
Description:It was found that polkit could be tricked into bypassing the credential checks for D-Bus requests, elevating the privileges of the requestor to the root user. This flaw could be used by an unprivileged local attacker to, for example, create a new local administrator. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Description

Script Bash --  CVE-2021-3560

Readme

# Bash-CVE-2021-3560
POC Bash --  CVE-2021-3560 
Polkit Local Privilege Escalation Exploit

This repository provides a ** bash exploit** for [CVE-2021-3560](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3560), a local privilege escalation vulnerability in **polkit** affecting many modern Linux distributions.
**!!!!!! Under test may cause instability !!!!!**

## 💥 Vulnerability Summary

Discovered by **Kevin Backhouse**, this vulnerability allows an unprivileged user to create accounts with administrative privileges via the `dbus` interface, by racing the polkit authorization check.

- **Vulnerable package**: `polkit <= 0.119`
- **CVE ID**: CVE-2021-3560
- **Impact**: Local Privilege Escalation (no authentication required)
- **CVSS**: 7.8 (High)

📰 [Original write-up by Kevin Backhouse (GitHub)](https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/)

## 🚀 Exploit Features

- Clean and readable bash script
- Configurable delay loop for race condition
- Stops after a defined number of failed attempts
- Silent execution (suppresses command spam)
- Automatically sets password for the new user

## 🔧 Usage

```bash
chmod +x exploit3560.sh
./exploit3560.sh

File Snapshot

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