CVE-2023-47586
📋 TL;DR
This vulnerability allows attackers to execute arbitrary code or disclose sensitive information by tricking users into opening malicious VPR files. It affects V-Server and V-Server Lite software versions up to V4.0.18.0. Users of these industrial automation software products are at risk.
💻 Affected Systems
- V-Server
- V-Server Lite
📦 What is this software?
V Server by Fujielectric
V Server by Fujielectric
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with remote code execution leading to data theft, system manipulation, or lateral movement within industrial control networks.
Likely Case
Local privilege escalation or data exfiltration from the affected system, potentially disrupting industrial processes.
If Mitigated
Limited impact if file execution is restricted through application whitelisting and user awareness training prevents opening untrusted files.
🎯 Exploit Status
Exploitation requires user interaction to open malicious files. No public exploit code has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V4.0.19.0 or later
Vendor Advisory: https://hakko-elec.co.jp/site/download/03tellus_inf/index.php
Restart Required: Yes
Instructions:
1. Download updated version from vendor website. 2. Backup configuration files. 3. Uninstall current version. 4. Install updated version. 5. Restore configuration files. 6. Restart system.
🔧 Temporary Workarounds
Restrict VPR file execution
windowsConfigure application control policies to prevent execution of VPR files from untrusted sources.
Use Windows AppLocker or similar to block VPR file execution
User awareness training
allTrain users to only open VPR files from trusted sources and verify file integrity.
🧯 If You Can't Patch
- Implement strict application whitelisting to prevent unauthorized VPR file execution
- Isolate affected systems from critical networks and implement network segmentation
🔍 How to Verify
Check if Vulnerable:
Check Help > About in V-Server application to see if version is V4.0.18.0 or earlier.Check Version:
Check application version in Help > About menu within V-Server softwareVerify Fix Applied:
Verify installed version is V4.0.19.0 or later in Help > About menu.📡 Detection & Monitoring
Log Indicators:
- Unexpected VPR file access events
- Process creation from V-Server with unusual parameters
- Memory access violations in application logs
Network Indicators:
- Unusual outbound connections from V-Server process
- File transfers involving VPR files from untrusted sources
SIEM Query:
Process Creation where Image contains 'V-Server' and CommandLine contains '.vpr'🔗 References
- https://hakko-elec.co.jp/site/download/03tellus_inf/index.php
- https://jvn.jp/en/vu/JVNVU93840158/
- https://monitouch.fujielectric.com/site/download-e/03tellus_inf/index.php
- https://hakko-elec.co.jp/site/download/03tellus_inf/index.php
- https://jvn.jp/en/vu/JVNVU93840158/
- https://monitouch.fujielectric.com/site/download-e/03tellus_inf/index.php
