CVE-2018-13858
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to execute system commands like reboot on MusicCenter/Trivum Multiroom Setup Tool devices. It affects systems running V8.76 - SNR 8604.26 - C4 Professional version. Attackers can exploit this by sending specially crafted GET requests to the vulnerable URL endpoint.
💻 Affected Systems
- MusicCenter / Trivum Multiroom Setup Tool
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary commands, disrupt services via forced reboots, or potentially gain further access to the network.
Likely Case
Service disruption through repeated reboots causing denial of service for multiroom audio systems.
If Mitigated
No impact if proper network segmentation and access controls prevent external access to the vulnerable endpoint.
🎯 Exploit Status
Exploitation requires only a simple HTTP GET request to the vulnerable endpoint with the action parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No vendor advisory found
Restart Required: No
Instructions:
No official patch available. Check with vendor for updated firmware versions.
🔧 Temporary Workarounds
Network Access Control
allRestrict network access to the device's web interface using firewall rules
Web Server Configuration
allBlock access to /xml/system/control.xml endpoint via web server configuration
🧯 If You Can't Patch
- Isolate the device on a separate VLAN with strict access controls
- Implement network monitoring for requests to /xml/system/control.xml endpoint
🔍 How to Verify
Check if Vulnerable:
Send GET request to http://[device_ip]/xml/system/control.xml?action=reboot and check if device rebootsCheck Version:
Check device web interface or documentation for firmware versionVerify Fix Applied:
Test if the vulnerable endpoint no longer accepts unauthorized commands📡 Detection & Monitoring
Log Indicators:
- HTTP GET requests to /xml/system/control.xml with action parameters
- Unexpected system reboots or service disruptions
Network Indicators:
- HTTP traffic to port 80/443 containing /xml/system/control.xml in URL
- Multiple reboot commands from single source
SIEM Query:
source_ip=* AND url_path="/xml/system/control.xml" AND url_query="*action=*"