CVE-2021-4034 PoC — polkit 缓冲区错误漏洞

Source

https://github.com/h3xcr4ck3r/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

```
sudo apt install golang-go
sudo apt install gccgo-go
```

```
grep PRETTY /etc/os-release
id
gcc cve-2021-4034-poc.c -o cve-2021-4034-poc
./cve-2021-4034-poc
```

![image](https://user-images.githubusercontent.com/66146701/151174896-8d71a2b9-c723-45d4-96c2-502ae6c69917.png)

File Snapshot


 [4.0K]  /data/pocs/b8f81e95f39b63ce0469f85763a1307c16ea2a9d
├── [1.0K]  cve-2021-4034-poc.c
└── [ 296]  README.md

0 directories, 2 files

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