CVE-2021-4034 PoC — polkit 缓冲区错误漏洞

Source

https://github.com/aus-mate/CVE-2021-4034-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。

Readme

# CVE-2021-4034-POC

POC for pwnkit vulnerability discovered by Qualys.

Compile & execute:
```
gcc lpe.c -o lpe; ./lpe
```

Creates the following directory/file structure:
```
/tmp
├── GCONV_PATH=.
│   └── test
├── payload.c
├── payload.so
├── test
│   └── gconv-modules
```


## References
- https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt
- https://hugeh0ge.github.io/2019/11/04/Getting-Arbitrary-Code-Execution-from-fopen-s-2nd-Argument/
- https://www.openwall.com/lists/oss-security/2017/06/23/8
- https://www.openwall.com/lists/oss-security/2014/07/14/1

File Snapshot


 [4.0K]  /data/pocs/52615bf09bad6333ba44f72f9e62af5dea9cdb54
├── [1.4K]  lpe.c
└── [ 615]  README.md

0 directories, 2 files

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