CVE-2021-4034 PoC — polkit 缓冲区错误漏洞

Source

https://github.com/wongwaituck/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。

Readme

# CVE-2021-4034

Obviously not original. Reworked it to understand what's going on. Credits to https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt for finding the vuln!

Other PoCs that helped me understand the sploitz:

- https://github.com/berdav/CVE-2021-4034
- https://github.com/ryaagard/CVE-2021-4034

## Building

```
make
```

## sploitz

```
❯ ./main
LOADED!
# whoami
root
# id
uid=0(root) gid=0(root) groups=0(root)
```

File Snapshot


 [4.0K]  /data/pocs/f6cff88a6e02eeade685159489c0ff7ca5d369ba
├── [  32]  gconv-modules
├── [3.7K]  main.c
├── [ 181]  Makefile
├── [ 316]  payload.c
└── [ 439]  README.md

0 directories, 5 files

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