CVE-2023-4685
📋 TL;DR
Delta Electronics' CNCSoft-B and DOPSoft software contain a stack-based buffer overflow vulnerability that allows attackers to execute arbitrary code on affected systems. This affects industrial control systems using CNCSoft-B version 1.0.0.4 or DOPSoft versions 4.0.0.82 and earlier. Successful exploitation could compromise industrial operations.
💻 Affected Systems
- Delta Electronics CNCSoft-B
- Delta Electronics DOPSoft
📦 What is this software?
Cncsoft B by Deltaww
Dopsoft by Deltaww
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to execute arbitrary code, disrupt industrial processes, steal sensitive data, or pivot to other systems on the network.
Likely Case
Local privilege escalation or remote code execution if the vulnerable software is exposed to untrusted inputs, potentially leading to production disruption.
If Mitigated
Limited impact if systems are properly segmented and access controls prevent exploitation attempts.
🎯 Exploit Status
Exploitation requires specific conditions where attacker can supply malicious input to the vulnerable software components.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to CNCSoft-B version 1.0.0.5 or later, DOPSoft version 4.0.0.83 or later
Vendor Advisory: https://www.deltaww.com/en-US/Support/Downloads/Detail?code=CNCSoft-B
Restart Required: Yes
Instructions:
1. Download latest version from Delta Electronics support portal. 2. Backup existing configurations. 3. Install updated software. 4. Restart affected systems. 5. Verify functionality.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected systems from untrusted networks and implement strict firewall rules.
Least Privilege Access
windowsRestrict user permissions and implement application whitelisting to prevent unauthorized execution.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable systems from production networks.
- Deploy intrusion detection systems to monitor for exploitation attempts and anomalous behavior.
🔍 How to Verify
Check if Vulnerable:
Check software version in Help > About menu or examine installed program version in Windows Control Panel.Check Version:
wmic product where name like "%CNCSoft-B%" or name like "%DOPSoft%" get name,versionVerify Fix Applied:
Verify installed version is CNCSoft-B 1.0.0.5+ or DOPSoft 4.0.0.83+ and test software functionality.📡 Detection & Monitoring
Log Indicators:
- Application crashes, unexpected process terminations, abnormal memory usage patterns in CNCSoft-B/DOPSoft
Network Indicators:
- Unusual network connections from CNC/HMI systems, unexpected outbound traffic
SIEM Query:
source="windows" AND (process_name="CNCSoft-B.exe" OR process_name="DOPSoft.exe") AND (event_id=1000 OR event_id=1001)