CVE-2025-31161 PoC — CrushFTP 安全漏洞

Source

https://github.com/Teexo/CVE-2025-31161

Associated Vulnerability

Title: CrushFTP 安全漏洞 (CVE-2025-31161)
Description:CrushFTP 10 before 10.8.4 and 11 before 11.3.1 allows authentication bypass and takeover of the crushadmin account (unless a DMZ proxy instance is used), as exploited in the wild in March and April 2025, aka "Unauthenticated HTTP(S) port access." A race condition exists in the AWS4-HMAC (compatible with S3) authorization method of the HTTP component of the FTP server. The server first verifies the existence of the user by performing a call to login_user_pass() with no password requirement. This will authenticate the session through the HMAC verification process and up until the server checks for user verification once more. The vulnerability can be further stabilized, eliminating the need for successfully triggering a race condition, by sending a mangled AWS4-HMAC header. By providing only the username and a following slash (/), the server will successfully find a username, which triggers the successful anypass authentication process, but the server will fail to find the expected SignedHeaders entry, resulting in an index-out-of-bounds error that stops the code from reaching the session cleanup. Together, these issues make it trivial to authenticate as any known or guessable user (e.g., crushadmin), and can lead to a full compromise of the system by obtaining an administrative account.

Description

Scans target to see if its vulnerable to CVE-2025-31161

Readme


 
# CVE-2025-31161 CrushFTP Authentication Bypass Scanner

A Python tool to detect and test for CVE-2025-31161 vulnerability in CrushFTP servers.




## 📖 Description

This script tests for the authentication bypass vulnerability (CVE-2025-31161) in CrushFTP servers that allows remote attackers to authenticate without valid credentials through HTTP Authorization header manipulation.

## ✨ Features

- 🔍 Interactive target input (IP and port)
- 🎯 Multiple exploitation payload testing
- 📊 Automatic vulnerability detection
- 🎨 Clear visual indicators with emojis
- 📋 Comprehensive results reporting
- ⚡ Easy to use with no complex configuration

## 🚀  Basic Usage

```bash
python3 CVE-2025-31161.py
```



# Installation  

```bash 
git clone https://github.com/yourusername/CVE-2025-31161.py
cd CVE-2025-31161.py
pip3 install -r requirements.txt
```  


## Example Session

$ python3 CVE-2025-31161.py

🔍 CrushFTP CVE-2025-31161 Authentication Bypass Tester
==================================================
**Enter target IP address**: 192.168.1.100  
**Enter target port** [8080]: 8080

#### 🎯 Target: http://192.168.1.100:8080  

#### 🚀 Starting vulnerability scan...  

==================================================

📡 **Testing:** /WebInterface/   
🔑 **Payload:** 'A'    
📊 **Status:**  200  
🎉 **VULNERABILITY CONFIRMED**  
💡 **200 OK with content:** dashboard, main  
✅ **Working payload:** 'A'  


## 📋 SCAN RESULTS  

==================================================  
🎯 **Target:** 192.168.1.100:8080  
🔴 **VULNERABILITY STATUS:** VULNERABLE  
💥 **CVE-2025-31161 Authentication Bypass CONFIRMED**

✅ **Working payloads:**  
#### 1. **A** -> /WebInterface/
==================================================  

### Legal Disclaimer  

This tool is for educational and authorized testing purposes only. Only use on systems you own or have explicit permission to test.

File Snapshot

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