CVE-2021-3156 PoC — Sudo 缓冲区错误漏洞

Source

https://github.com/CptGibbon/CVE-2021-3156

Associated Vulnerability

Title:Sudo 缓冲区错误漏洞 (CVE-2021-3156)
Description:Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via "sudoedit -s" and a command-line argument that ends with a single backslash character.

Description

Root shell PoC for CVE-2021-3156

Readme

# CVE-2021-3156
#### Root shell PoC for CVE-2021-3156 (no bruteforce)
For educational purposes etc.

Tested on Ubuntu 20.04 against sudo 1.8.31

All research credit: **Qualys Research Team**
Check out the details on their [blog](https://blog.qualys.com/vulnerabilities-research/2021/01/26/cve-2021-3156-heap-based-buffer-overflow-in-sudo-baron-samedit).

You can check your version of sudo is vulnerable with: `$ sudoedit -s Y`.
If it asks for your password it's most likely vulnerable, if it prints usage information it isn't.
You can downgrade to the vulnerable version on Ubuntu 20.04 for testing purposes with `$ sudo apt install sudo=1.8.31-1ubuntu1`

#### Usage
`$ make`

`$ ./exploit`

File Snapshot


 [4.0K]  /data/pocs/b2cdca42f47893100315b02fa631bf29beb0fd89
├── [ 332]  Dockerfile
├── [2.0K]  exploit.c
├── [ 208]  Makefile
├── [ 692]  README.md
└── [ 599]  shellcode.c

0 directories, 5 files

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