CVE-2024-4040 PoC — Unauthenticated arbitrary file read and remote code execution in CrushFTP

Source

Associated Vulnerability

Description

Exploit for CVE-2024-4040 – Authentication bypass in CrushFTP via CrushAuth cookie and AWS-style header spoofing. Stealthy Python PoC with secure token generation, SSL bypass, and improved output.

Readme

# CVE-2024-4040 — CrushFTP Authentication Bypass Exploit

This repository contains a stealthy Python proof-of-concept (PoC) exploit for **CVE-2024-4040**, a critical vulnerability in CrushFTP (v10 and below) that allows an attacker to bypass authentication using a forged `CrushAuth` cookie and AWS-style `Authorization` header.

## 🚨 Vulnerability Summary

> An unauthenticated attacker can bypass authentication in vulnerable CrushFTP instances by crafting a specific cookie/header combination, gaining unauthorized access to internal web functions.

- **CVE ID**: [CVE-2024-4040](https://nvd.nist.gov/vuln/detail/CVE-2024-4040)
- **Severity**: Critical (CVSS 9.8)
- **Affected**: CrushFTP v10.x (prior to official patch)

---

## ⚙️ Features

- ✅ Python 3.x PoC
- ✅ Secure `CrushAuth` generation using `secrets`
- ✅ Valid AWS-style spoofed `Authorization` header
- ✅ Built-in SSL bypass with suppression
- ✅ No external dependencies (only `requests`)
- ✅ Clean console output with status and detection

---

## 🛠 Usage

```bash
python3 CVE-2024-4040.py http://target-ip:8080 --valid_username crushadmin
```

`target_url` — Base URL of the CrushFTP server

`--valid_username` — Known valid user (default: crushadmin)

---

🔍 Example Output
```
[*] CrushFTP Authentication Bypass Exploit
[*] Targeting: http://192.168.1.10:8080
[*] Using username: crushadmin

[+] Exploit Result:

Status_Code    : 200
Response_Text  : {"getUserNameResponse":{"user_name":"crushadmin"}}

[+] CrushFTP Server is VULNERABLE!
```

---

## ⚠️ Legal Notice

This code is for educational and authorized security testing purposes only.
Do not use against systems you do not own or have explicit permission to test.


---

## 🙏 Credits

PoC Refactor: illdeed

File Snapshot

 [4.0K]  /data/pocs/89eefce71078dbd7ff09d2122df8192a7fe46f7f
├── [3.2K]  CVE-2024-4040.py
├── [1.0K]  LICENSE
└── [1.7K]  README.md

0 directories, 3 files

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