CVE-2023-5131
📋 TL;DR
A heap buffer overflow vulnerability in Delta Electronics ISPSoft allows remote code execution when a user opens a malicious DVP file. This affects users of Delta Electronics industrial automation software. Attackers can exploit this to gain control of affected systems.
💻 Affected Systems
- Delta Electronics ISPSoft
📦 What is this software?
Ispsoft by Deltaww
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control, potentially leading to industrial process disruption, data theft, or lateral movement within OT networks.
Likely Case
Local privilege escalation leading to unauthorized access to industrial control systems and potential manipulation of PLC programming.
If Mitigated
Limited impact if systems are air-gapped, users are trained not to open untrusted files, and proper network segmentation is in place.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). The vulnerability is well-documented with technical details available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Delta Electronics security advisory for specific version
Vendor Advisory: https://www.deltaww.com/en-US/Services/DownloadCenter/Detail/ISPSoft
Restart Required: Yes
Instructions:
1. Visit Delta Electronics download center
2. Download latest ISPSoft version
3. Uninstall current version
4. Install updated version
5. Restart system
🔧 Temporary Workarounds
Restrict DVP file execution
windowsBlock execution of DVP files via group policy or application control
Using Windows Group Policy: Computer Configuration > Windows Settings > Security Settings > Software Restriction Policies > Additional Rules > New Path Rule: *.dvp = Disallowed
User awareness training
allTrain users not to open DVP files from untrusted sources
🧯 If You Can't Patch
- Implement application whitelisting to prevent unauthorized software execution
- Segment industrial control networks from business networks to limit attack surface
🔍 How to Verify
Check if Vulnerable:
Check ISPSoft version against Delta Electronics security advisory. If using unpatched version, system is vulnerable.Check Version:
Open ISPSoft > Help > About to check version numberVerify Fix Applied:
Verify ISPSoft version matches or exceeds patched version specified in vendor advisory.📡 Detection & Monitoring
Log Indicators:
- Unexpected process creation from ISPSoft
- Abnormal file access patterns for DVP files
- Windows Application logs showing ISPSoft crashes
Network Indicators:
- Unusual outbound connections from systems running ISPSoft
- File transfers containing DVP extensions
SIEM Query:
source="windows" AND (process_name="ISPSoft.exe" AND (event_id=4688 OR event_id=1000)) OR (file_extension=".dvp" AND event_id=4663)