CVE-2024-38658
📋 TL;DR
An out-of-bounds read vulnerability in Fuji Electric V-Server and V-Server Lite SCADA software allows attackers to disclose sensitive information or execute arbitrary code by tricking users into opening malicious files. This affects all versions up to and including 4.0.19.0. Industrial control system operators using these products are at risk.
💻 Affected Systems
- V-Server
- V-Server Lite
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise leading to industrial process disruption, data theft, or ransomware deployment on SCADA networks.
Likely Case
Information disclosure of sensitive SCADA configuration data and potential limited code execution in user context.
If Mitigated
No impact if systems are properly segmented and users don't open untrusted files.
🎯 Exploit Status
Requires social engineering to deliver malicious file. No public exploit code identified yet.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to version newer than 4.0.19.0
Vendor Advisory: https://monitouch.fujielectric.com/site/download-e/03tellus_inf/index.php
Restart Required: Yes
Instructions:
1. Download latest version from Fuji Electric website. 2. Backup configurations. 3. Install update. 4. Restart system. 5. Verify version is >4.0.19.0.
🔧 Temporary Workarounds
Restrict file execution
windowsBlock execution of untrusted files via application whitelisting
Configure Windows AppLocker or similar to restrict V-Server file types
User training
allTrain users not to open untrusted files with V-Server
🧯 If You Can't Patch
- Network segmentation: Isolate V-Server systems from general user networks
- Implement strict file validation: Only allow trusted, verified files to be opened
🔍 How to Verify
Check if Vulnerable:
Check Help > About in V-Server interface for version numberCheck Version:
Check V-Server GUI or registry: HKEY_LOCAL_MACHINE\SOFTWARE\Fuji Electric\V-ServerVerify Fix Applied:
Verify version is newer than 4.0.19.0 in Help > About📡 Detection & Monitoring
Log Indicators:
- Unexpected file opens in V-Server
- Crash logs from V-Server process
Network Indicators:
- Unusual file transfers to V-Server systems
- Suspicious email attachments targeting operators
SIEM Query:
EventID=4688 AND ProcessName LIKE '%v-server%' AND CommandLine CONTAINS '.vsp' OR '.vsl'