关联漏洞
标题:
polkit 缓冲区错误漏洞
(CVE-2021-4034)
描述: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。
描述
PwnKit PoC for Polkit pkexec CVE-2021-4034
介绍
# CVE-2021-4034-PwnKit
PwnKit PoC for Polkit pkexec CVE-2021-4034
Based on the PoC by blasty
[blasty-vs-pkexec.c](https://haxx.in/files/blasty-vs-pkexec.c)
For PwnKit details see the blog poet at Qualys
[PwnKit: Local Privilege Escalation Vulnerability Discovered in polkit’s pkexec (CVE-2021-4034)](https://blog.qualys.com/vulnerabilities-threat-research/2022/01/25/pwnkit-local-privilege-escalation-vulnerability-discovered-in-polkits-pkexec-cve-2021-4034)
## Summary
This repo is a nim based PwnKit PoC. The payload shared library is embedded in the executable, so gcc is not required on the target.
To get set up with a nim enviroment, see HuskyHacks post.
[Nim on the Attack: Process Injection Using Nim and the Windows API](https://huskyhacks.dev/2021/07/17/nim-exploit-dev/)
Issues and PRs welcome.
## Setup
Clone the repo and run make to create the navipwnkit executable.
Copy the executable to the target and run to get root.

文件快照
[4.0K] /data/pocs/116d402f81b6593525a21e0ec988693465abf783
├── [1.0K] LICENSE
├── [ 187] Makefile
├── [ 612] navipwnkit.nim
├── [ 414] payload.nim
├── [1008] README.md
└── [4.0K] screenshots
└── [ 12K] navipwnkit.png
1 directory, 6 files
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