CVE-2024-47131
📋 TL;DR
This vulnerability allows remote code execution through a stack-based buffer overflow in Delta Electronics DIAScreen's BACnetObjectInfo component. Attackers can exploit it by tricking users into opening malicious files, potentially compromising industrial control systems. Organizations using Delta Electronics DIAScreen software are affected.
💻 Affected Systems
- Delta Electronics DIAScreen
📦 What is this software?
Diascreen by Deltaww
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to execute arbitrary code with system privileges, potentially disrupting industrial operations or establishing persistence in OT environments.
Likely Case
Attacker gains initial foothold in industrial network through social engineering, then escalates privileges to compromise other systems in the OT environment.
If Mitigated
Limited impact due to network segmentation, application whitelisting, and user awareness preventing malicious file execution.
🎯 Exploit Status
Exploitation requires social engineering to trick users into opening malicious files. Stack-based buffer overflow suggests reliable exploitation is possible with proper exploit development.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Delta Electronics advisory for specific patched version
Vendor Advisory: https://www.deltaww.com/en-US/Cybersecurity_Advisory
Restart Required: Yes
Instructions:
1. Review Delta Electronics security advisory ICSA-24-312-02
2. Download the patched version from Delta Electronics official website
3. Backup current configuration and data
4. Install the update following vendor instructions
5. Restart the system as required
6. Verify the update was successful
🔧 Temporary Workarounds
Application Control / Whitelisting
windowsRestrict execution of DIAScreen to trusted locations and prevent execution of untrusted files
Configure Windows AppLocker or similar application control solution
User Awareness Training
allTrain users not to open untrusted files with DIAScreen
🧯 If You Can't Patch
- Implement network segmentation to isolate DIAScreen systems from untrusted networks
- Deploy endpoint detection and response (EDR) solutions to monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check DIAScreen version against vendor advisory. Review system logs for unexpected file opens or crashes.Check Version:
Check DIAScreen 'About' dialog or installation directory for version informationVerify Fix Applied:
Verify installed version matches patched version from vendor advisory. Test with sample files to ensure no crashes occur.📡 Detection & Monitoring
Log Indicators:
- Unexpected DIAScreen crashes
- Suspicious file opens with DIAScreen
- Process creation from DIAScreen with unusual parameters
Network Indicators:
- Unusual network connections originating from DIAScreen process
- File transfers to/from DIAScreen systems
SIEM Query:
Process: DIAScreen.exe AND (EventID: 1000 OR EventID: 1001) OR FileOperation: *.dsp opened