CVE-2021-4034 PoC — polkit 缓冲区错误漏洞

Source

https://github.com/rayheffer/CVE-2021-4034

Associated Vulnerability

Title:polkit 缓冲区错误漏洞 (CVE-2021-4034)
Description:polkit是一个在类 Unix操作系统中控制系统范围权限的组件。通过定义和审核权限规则，实现不同优先级进程间的通讯。 polkit 的 pkexec application存在缓冲区错误漏洞，攻击者可利用该漏洞通过精心设计环境变量诱导pkexec执行任意代码。成功执行攻击后，如果目标计算机上没有权限的用户拥有管理权限，攻击可能会导致本地权限升级。

Description

Exploit PoC for the polkit pkexec (PWNKIT) vulnerability

Readme

## CVE-2021-4034
https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt

## Build
To compile, just use `make`

**Note**: CentOS 8 Stream doesn't have dev tools. Install them with: `dnf groupinstall 'Development Tools'`

## Usage
Execute `./cve-2021-4034`

If your distro is vulnerable you will get root!

![Demo on Kali](https://raw.githubusercontent.com/rayheffer/CVE-2021-4034/master/cve-2021-4034_screenshot.png)

File Snapshot


 [4.0K]  /data/pocs/967e113b531690814daa6c08eb5bd159be0ae191
├── [ 274]  cve-2021-4034.c
├── [131K]  cve-2021-4034_screenshot.png
├── [ 400]  Makefile
├── [ 339]  pwnkit.c
└── [ 420]  README.md

0 directories, 5 files

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