CVE-2021-4034 PoC — polkit 缓冲区错误漏洞

Source

https://github.com/BugVex/Poison-HTB-Report

Associated Vulnerability

Title:polkit 缓冲区错误漏洞 (CVE-2021-4034)
Description:A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec application is a setuid tool designed to allow unprivileged users to run commands as privileged users according predefined policies. The current version of pkexec doesn't handle the calling parameters count correctly and ends trying to execute environment variables as commands. An attacker can leverage this by crafting environment variables in such a way it'll induce pkexec to execute arbitrary code. When successfully executed the attack can cause a local privilege escalation given unprivileged users administrative rights on the target machine.

Description

Privilege Escalation on HTB "Poison" using PwnKit (CVE-2021-4034)

Readme

# Poison-HTB-Report
Privilege Escalation on HTB "Poison" using PwnKit (CVE-2021-4034)

# HTB "Poison" - Privilege Escalation Report (BugVex)

This repository contains a full vulnerability report on the Hack The Box machine **Poison**.

## 🔍 Exploit Summary

- **CVE:** CVE-2021-4034 (PwnKit)
- **Technique:** Privilege escalation via environment variable manipulation
- **Impact:** Root shell from unprivileged user
- **Tools used:** Nmap, Gobuster, LinPEAS, GCC, Burp Suite, GDB

## 🧠 Notes

This report is part of my bug bounty and pentesting archive.  
Crafted by `BugVex` – follow for more reports.

File Snapshot


 [4.0K]  /data/pocs/f8e7aba06587aad82f3ebf3a15480a3376c4e63d
├── [2.0K]  BugVex.md
├── [2.8K]  index.md
└── [ 611]  README.md

0 directories, 3 files

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