CVE-2023-51576
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to execute arbitrary code with SYSTEM privileges on Voltronic Power ViewPower systems. The flaw exists in the RMI interface on TCP port 51099 where untrusted data is deserialized without proper validation. All installations with the vulnerable RMI interface exposed are affected.
💻 Affected Systems
- Voltronic Power ViewPower
📦 What is this software?
Viewpower by Voltronicpower
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with SYSTEM privileges, allowing attackers to install malware, exfiltrate data, pivot to other systems, or disrupt power monitoring operations.
Likely Case
Remote code execution leading to ransomware deployment, data theft, or system disruption given the high CVSS score and unauthenticated nature.
If Mitigated
Limited impact if proper network segmentation and access controls prevent external access to port 51099.
🎯 Exploit Status
ZDI-CAN-22012 indicates proof-of-concept exists, and the vulnerability requires no authentication with straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in available references
Vendor Advisory: Not provided in available references
Restart Required: Yes
Instructions:
1. Contact Voltronic Power for the security patch. 2. Apply the patch to all affected ViewPower installations. 3. Restart the ViewPower service or system to activate the fix.
🔧 Temporary Workarounds
Block RMI Port Access
allBlock external and unnecessary internal access to TCP port 51099 using firewall rules.
Windows: netsh advfirewall firewall add rule name="Block ViewPower RMI" dir=in action=block protocol=TCP localport=51099
Linux: iptables -A INPUT -p tcp --dport 51099 -j DROP
Disable RMI Interface
windowsDisable the vulnerable RMI interface if not required for operations.
Consult Voltronic Power documentation for disabling RMI interface
🧯 If You Can't Patch
- Implement strict network segmentation to isolate ViewPower systems from untrusted networks.
- Deploy intrusion detection/prevention systems to monitor and block exploitation attempts on port 51099.
🔍 How to Verify
Check if Vulnerable:
Check if TCP port 51099 is listening on ViewPower systems using netstat or port scanning tools.Check Version:
Check ViewPower application version through its interface or consult vendor documentation.Verify Fix Applied:
Verify the patch is applied by checking version information and confirming port 51099 is no longer vulnerable to deserialization attacks.📡 Detection & Monitoring
Log Indicators:
- Unusual process creation events, especially with SYSTEM privileges
- Network connections to port 51099 from unexpected sources
- Java deserialization errors in application logs
Network Indicators:
- Traffic to TCP port 51099 containing serialized Java objects
- Exploitation patterns matching known deserialization payloads
SIEM Query:
source_port=51099 OR (event_id=4688 AND process_name="cmd.exe" AND user="SYSTEM")