CVE-2021-4034 PoC — polkit 缓冲区错误漏洞

Source

https://github.com/callrbx/pkexec-lpe-poc

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

POC for CVE-2021-4034

Readme

# pkexec-lpe-poc
POC for CVE-2021-4034

[Original Writeup](https://seclists.org/oss-sec/2022/q1/80)

For ease of use, it accepts a C file payload instead of a hardcoded shell.

usage:
```
make
./poc payload.c
```

tested on `Ubuntu 20.04.3 LTS - Linux target 5.4.0-81-generic`

File Snapshot


 [4.0K]  /data/pocs/a508c375b67ee2abc2d840d0643908d0b4874f37
├── [  88]  Makefile
├── [ 672]  payload.c
├── [4.1K]  poc.c
└── [ 277]  README.md

0 directories, 4 files

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