CVE-2025-63228
📋 TL;DR
The Mozart FM Transmitter web management interface contains an unauthenticated file upload vulnerability that allows attackers to upload malicious files like PHP webshells without authentication. This enables remote code execution and full system compromise. All systems running the affected version are vulnerable.
💻 Affected Systems
- Mozart FM Transmitter
📦 What is this software?
Mozart Dds Next 1000 Firmware by Dbbroadcast
Mozart Dds Next 2000 Firmware by Dbbroadcast
Mozart Dds Next 3000 Firmware by Dbbroadcast
Mozart Dds Next 3500 Firmware by Dbbroadcast
Mozart Dds Next 6000 Firmware by Dbbroadcast
Mozart Dds Next 7000 Firmware by Dbbroadcast
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with attacker gaining root/admin privileges, data exfiltration, ransomware deployment, and persistent backdoor installation.
Likely Case
Webshell deployment leading to data theft, lateral movement within the network, and use as a pivot point for further attacks.
If Mitigated
Limited impact due to network segmentation, but still potential for initial foothold in the affected system.
🎯 Exploit Status
Exploitation requires only a crafted HTTP POST request to the vulnerable endpoint with a malicious file.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.dbbroadcast.com/
Restart Required: No
Instructions:
1. Contact vendor for patch availability 2. Apply patch when available 3. Verify the /upload_file.php endpoint is secured
🔧 Temporary Workarounds
Block Unauthenticated Access to Upload Endpoint
allUse web server configuration or firewall rules to block unauthenticated access to /upload_file.php
# Apache: <Location /upload_file.php> Require valid-user </Location>
# Nginx: location /upload_file.php { deny all; }
Disable Web Management Interface
allTemporarily disable the web interface if not required for operations
# System-specific commands to disable web service
🧯 If You Can't Patch
- Implement strict network segmentation to isolate the device from critical systems
- Deploy a WAF with file upload filtering rules to block malicious uploads
🔍 How to Verify
Check if Vulnerable:
Attempt to upload a test file to http://[target]/upload_file.php without authentication. If successful, system is vulnerable.Check Version:
Check web interface version in admin panel or via HTTP headersVerify Fix Applied:
Verify that unauthenticated file uploads to /upload_file.php are rejected with proper authentication requirements.📡 Detection & Monitoring
Log Indicators:
- POST requests to /upload_file.php from unauthenticated sources
- File creation in /upload/ directory with suspicious extensions (.php, .jsp, .asp)
Network Indicators:
- Unusual outbound connections from the device
- HTTP POST requests with file uploads to the vulnerable endpoint
SIEM Query:
source="web_logs" AND (uri="/upload_file.php" AND method="POST") AND NOT user_agent="legitimate_client"