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: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

pwnKit: Privilege Escalation USB-Rubber-Ducky payload, which exploits CVE-2021-4034 in less than 10sec's and spawns root shell for you.

Readme

# pwnKit

## About:
* Title: pwnKit
* Description: Privilege escalation in Unix-like operating systems
* AUTHOR: drapl0n
* Version: 1.0
* Category: Privilege Escalation
* Target: Unix-like operating systems
* Attackmodes: HID

## pwnKit is Privilege Escalation USB-Rubber-Ducky payload, which exploits CVE-2021-4034 in less than 10sec's and spawns root shell for you.

* Shoutout to https://github.com/berdav for exploit.
* Only for educational purpose.
### Variation's:
1. Online: payload.txt(requires internet connection on victims machine).
2. Offline: payload2.txt(don't require internet connection on victims machine).

### Workflow:
1. Stop storing history, this helps to keep tracks clear from begining.
2. Creating temporary folder for storing exploit code and compiling it.
3. Importing, compiling and executing exploit.
4. Spawning root shell.
5. Deleting exploit code and clearing tracks.

#### Support me if you like my work:
* https://twitter.com/drapl0n

File Snapshot


 [4.0K]  /data/pocs/b1908b68fea03d7f24d4fb393664124c219edbd4
├── [2.1K]  payload2.txt
├── [ 543]  payload.txt
└── [ 968]  README.md

0 directories, 3 files

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