CVE-2021-3156 PoC — Sudo 缓冲区错误漏洞

Source

https://github.com/arvindshima/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

CVE-2021-3156: Heap-Based Buffer Overflow in Sudo (Baron Samedit)

Readme

# CVE-2021-3156: Heap-Based Buffer Overflow in Sudo (Baron Samedit)

## Root Exploit (No BruteForce)

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).

Manually installed Ubuntu 20.04 LTS and Sudo version 1.8.31 on Docker container for testing purpose and running the command `sudoedit -s 'AAAAAAAAAAAAAAAAAAAA\'`.

## PoC

![poc1](src/poc1.png)

![poc2](src/poc2.gif)

File Snapshot


 [4.0K]  /data/pocs/ac572e3250992d020e2d399225041eec98343345
├── [ 332]  Dockerfile
├── [2.0K]  exploit.c
├── [ 208]  Makefile
├── [ 529]  README.md
├── [ 599]  shellcode.c
└── [4.0K]  src
    ├── [ 44K]  poc1.png
    └── [114K]  poc2.gif

1 directory, 7 files

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