CVE-2024-38309
📋 TL;DR
Multiple stack-based buffer overflow vulnerabilities in Fuji Electric's V-SFT, TELLUS, and TELLUS Lite software allow attackers to execute arbitrary code or disclose information when users open malicious files. This affects all users running vulnerable versions of these industrial control system software products.
💻 Affected Systems
- V-SFT
- TELLUS
- TELLUS 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
Complete system compromise with remote code execution leading to industrial process disruption, data theft, or ransomware deployment.
Likely Case
Local privilege escalation leading to unauthorized access to industrial control systems and potential manipulation of operational parameters.
If Mitigated
Limited impact if proper network segmentation and least privilege access controls are implemented.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file) and knowledge of file format specifics.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V-SFT v6.2.3.0 or later, TELLUS v4.0.20.0 or later, TELLUS Lite v4.0.20.0 or later
Vendor Advisory: https://monitouch.fujielectric.com/site/download-e/03tellus_inf/index.php
Restart Required: Yes
Instructions:
1. Download updated software from Fuji Electric's website. 2. Backup configuration files. 3. Uninstall vulnerable version. 4. Install patched version. 5. Restore configuration files. 6. Restart system.
🔧 Temporary Workarounds
Restrict File Access
allImplement strict file access controls to prevent opening untrusted files
Application Whitelisting
windowsConfigure Windows AppLocker or similar to restrict execution to trusted applications only
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected systems from untrusted networks
- Enforce least privilege access controls and disable unnecessary file sharing services
🔍 How to Verify
Check if Vulnerable:
Check software version in Help > About menu or program propertiesCheck Version:
Check application properties or Help > About menu in the software interfaceVerify Fix Applied:
Verify installed version is equal to or greater than patched versions listed above📡 Detection & Monitoring
Log Indicators:
- Unexpected application crashes
- Suspicious file access patterns
- Unusual process creation from TELLUS/V-SFT processes
Network Indicators:
- Unusual outbound connections from industrial control systems
- File transfer activity to/from TELLUS/V-SFT systems
SIEM Query:
source="windows" AND (process_name="*TELLUS*" OR process_name="*V-SFT*") AND (event_id=1000 OR event_id=1001)