CVE-2024-7502
📋 TL;DR
A stack-based buffer overflow vulnerability in Delta Electronics DIAScreen allows remote code execution when processing malicious DPA files. This affects industrial control systems using DIAScreen software for HMI/SCADA applications. Attackers could gain full control of affected systems.
💻 Affected Systems
- Delta Electronics DIAScreen
📦 What is this software?
Diascreen by Deltaww
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary code, disrupt industrial processes, manipulate control systems, and potentially cause physical damage or safety incidents.
Likely Case
Remote code execution leading to data theft, system manipulation, lateral movement within industrial networks, and disruption of HMI operations.
If Mitigated
Limited impact if systems are air-gapped, have strict file validation, and proper network segmentation prevents exploitation.
🎯 Exploit Status
Exploitation requires crafting a malicious DPA file that triggers the buffer overflow. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Delta Electronics advisory for specific patched version
Vendor Advisory: https://www.delta-china.com/
Restart Required: Yes
Instructions:
1. Contact Delta Electronics for security updates
2. Apply the latest DIAScreen patch from official vendor sources
3. Restart affected systems after patching
4. Validate patch effectiveness
🔧 Temporary Workarounds
Restrict DPA file processing
allLimit DIAScreen to only process DPA files from trusted sources and implement file validation
Network segmentation
allIsolate DIAScreen systems from untrusted networks and implement strict firewall rules
🧯 If You Can't Patch
- Implement application whitelisting to prevent unauthorized code execution
- Deploy network monitoring and intrusion detection for DPA file processing anomalies
🔍 How to Verify
Check if Vulnerable:
Check DIAScreen version against vendor advisory. Systems processing DPA files without latest patches are vulnerable.Check Version:
Check DIAScreen 'About' dialog or installation directory version informationVerify Fix Applied:
Verify DIAScreen version matches patched release from vendor advisory and test with known safe DPA files.📡 Detection & Monitoring
Log Indicators:
- Unusual DPA file processing errors
- Application crashes in DIAScreen
- Unexpected process execution following DPA file handling
Network Indicators:
- Unusual network connections from DIAScreen systems
- DPA file transfers from untrusted sources
SIEM Query:
source="DIAScreen" AND (event_type="crash" OR event_type="file_processing_error")