CVE-2021-4034 PoC — polkit 缓冲区错误漏洞

Source

https://github.com/robemmerson/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 - Docker Container Deliberately Vulnerable Version
Docker PoC for PwnKit: Local Privilege Escalation Vulnerability in polkit’s pkexec (CVE-2021-4034)

https://seclists.org/oss-sec/2022/q1/80  
https://blog.qualys.com/vulnerabilities-threat-research/2022/01/25/pwnkit-local-privilege-escalation-vulnerability-discovered-in-polkits-pkexec-cve-2021-4034

# PoC

To run the container:

```
user@debian:~$ docker run -it --rm baconspider/cve-2021-4034 bash
low@35bbe8a7ac93:/opt/test$ id
uid=1000(low) gid=1000(low) groups=1000(low)
low@35bbe8a7ac93:/opt/test$ ./pwnkit
root@35bbe8a7ac93:/opt/test# id
uid=0(root) gid=0(root) groups=0(root)
```

File Snapshot


 [4.0K]  /data/pocs/aa15102f4357d28df578edc19d7dbb4c4fe31f69
├── [4.0K]  archive
│   ├── [1.2K]  cve-2021-4034-poc.c
│   └── [ 477]  Dockerfile
├── [ 420]  Dockerfile
├── [ 16K]  pwnkit
├── [3.1K]  pwnkit.c
└── [ 658]  README.md

1 directory, 6 files

Shenlong Bot has cached this for you

Remarks

1. It is advised to access via the original source first.

2. If the original source is unavailable, please email f.jinxu#gmail.com for a local snapshot (replace # with @).

3. Shenlong has snapshotted the POC code for you. To support long-term maintenance, please consider donating. Thank you for your support.

Goal Reached Thanks to every supporter — we hit 100%!