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## https://sploitus.com/exploit?id=556A2B29-9035-5DEE-B08F-684BD9D16623
# CVE-2025-14847 - MongoBleed
[](https://python.org)
[](LICENSE)
[](https://nvd.nist.gov/vuln/detail/CVE-2025-14847)
> **๐จโ๐ป Author:** Furkan KAYAPINAR ([@FurkanKAYAPINAR](https://github.com/FurkanKAYAPINAR))
> **โ ๏ธ EDUCATIONAL PURPOSE ONLY**
Lab environment, exploit script, and detection rules for the critical unauthenticated memory-leak vulnerability in MongoDB Server.
---
## ๐ Table of Contents
- [Vulnerability Overview](#-vulnerability-overview)
- [Affected Versions](#-affected-versions)
- [Installation](#-installation)
- [Lab Environment](#-lab-environment)
- [Usage](#-usage)
- [Detection](#-detection)
- [Remediation](#-remediation)
- [Legal Disclaimer](#-legal-disclaimer)
---
## ๐ด Vulnerability Overview
**CVE-2025-14847 (MongoBleed)** is a critical unauthenticated memory-leak vulnerability in MongoDB Server's zlib compression handling.
| Attribute | Value |
|-----------|-------|
| **CVE ID** | CVE-2025-14847 |
| **CVSS Score** | 8.7 (High) |
| **Attack Vector** | Network |
| **Authentication** | None Required |
| **Disclosure Date** | December 19, 2025 |
### Technical Details
The vulnerability exists in `message_compressor_zlib.cpp`. When processing `OP_COMPRESSED` messages:
1. Attacker sends crafted message with inconsistent length fields
2. Server allocates buffer based on declared `uncompressedSize`
3. Actual decompressed data is smaller than declared
4. Server returns allocated buffer length instead of actual data length
5. **Uninitialized heap memory is leaked to the attacker**
### Impact
Leaked data may include:
- ๐ Authentication tokens and secrets
- ๐๏ธ Database session data
- ๐ค PII (Personally Identifiable Information)
- ๐ API keys and passwords
- โ๏ธ Configuration details
---
## ๐ฆ Affected Versions
| Version Range | Patched Version |
|--------------|-----------------|
| 8.2.0 - 8.2.2 | 8.2.3 |
| 8.0.0 - 8.0.16 | 8.0.17 |
| 7.0.0 - 7.0.26 | 7.0.28 |
| 6.0.0 - 6.0.26 | 6.0.27 |
| 5.0.0 - 5.0.31 | 5.0.32 |
| 4.4.0 - 4.4.29 | 4.4.30 |
| All 4.2, 4.0, 3.6 | EOL - Upgrade immediately |
---
## ๐ Installation
```bash
# Clone repository
git clone https://github.com/FurkanKAYAPINAR/CVE-2025-14847-MongoDB.git
cd CVE-2025-14847-MongoDB
# Create virtual environment
python3 -m venv venv
source venv/bin/activate # Linux/macOS
# venv\Scripts\activate # Windows
# Install dependencies
pip install -r requirements.txt
```
---
## ๐งช Lab Environment
Start a vulnerable MongoDB instance for testing:
```bash
cd lab
# Start vulnerable MongoDB (6.0.26 with zlib enabled)
docker-compose up -d
# Verify it's running
docker-compose ps
# Load sample data (optional)
./setup.sh load-data
# Stop lab
docker-compose down
```
---
## ๐ Usage
### Basic Exploit
```bash
# Single target
python exploit/mongobleed.py -u 127.0.0.1
# With specific port
python exploit/mongobleed.py -u 127.0.0.1 -p 27017
# Save leaked data to file
python exploit/mongobleed.py -u 127.0.0.1 -o leaked_data.bin
# Multiple iterations for more data
python exploit/mongobleed.py -u 127.0.0.1 -i 20
# Quiet mode (less output)
python exploit/mongobleed.py -u 127.0.0.1 -q
# Without hex dump
python exploit/mongobleed.py -u 127.0.0.1 --no-hex
```
### Vulnerability Scanner
```bash
# Safe mode - detect without exploiting
python detection/scanner.py --target 127.0.0.1 --safe-mode
# Scan CIDR range
python detection/scanner.py --range 192.168.1.0/24 --safe-mode
# Scan from file
python detection/scanner.py --file targets.txt --safe-mode
```
---
## ๐ก๏ธ Detection
### Sigma Rules
```bash
# Location: detection/sigma/mongobleed.yml
# Compatible with: Splunk, Elastic, QRadar, Azure Sentinel
```
### Suricata/Snort Rules
```bash
# Location: detection/suricata/mongobleed.rules
# Add to your IDS configuration
```
### YARA Rules
```bash
# Location: detection/yara/mongobleed.yar
# For memory/packet analysis
```
---
## ๐ง Remediation
### Option 1: Upgrade (Recommended)
```bash
# Update to patched version
# Example for MongoDB 6.x
sudo apt-get update
sudo apt-get install mongodb-org=6.0.27
```
### Option 2: Disable zlib Compression
```bash
# Start mongod without zlib
mongod --networkMessageCompressors snappy,zstd
# Or in mongod.conf
net:
compression:
compressors: snappy,zstd
```
### Verify Fix
```bash
python remediation/verify_fix.py --target 127.0.0.1 --port 27017
```
---
## โ๏ธ Legal Disclaimer
> **๐จ WARNING**
>
> This tool is provided for **educational and authorized security testing purposes only**.
>
> - Unauthorized access to computer systems is illegal
> - You are solely responsible for your actions
> - The authors assume no liability for misuse
**By using this tool, you agree that you have proper authorization to test the target systems.**
---
## ๐ References
- [NVD - CVE-2025-14847](https://nvd.nist.gov/vuln/detail/CVE-2025-14847)
- [MongoDB Security Advisory](https://www.mongodb.com/alerts)
- [Varonis - MongoBleed Analysis](https://www.varonis.com)
---
## ๐ค Contributing
Contributions are welcome! Please read [CONTRIBUTING.md](CONTRIBUTING.md) first.
---
## ๐ License
This project is licensed under the MIT License - see [LICENSE](LICENSE) file.