CVE-2018-10594
📋 TL;DR
CVE-2018-10594 is a critical buffer overflow vulnerability in Delta Industrial Automation COMMGR software and PLC simulators that allows remote attackers to execute arbitrary code or cause denial-of-service. The vulnerability affects industrial control systems using Delta Electronics products. Attackers can exploit this by sending specially crafted network packets to the vulnerable service.
💻 Affected Systems
- Delta Industrial Automation COMMGR
- DVPSimulator EH2
- DVPSimulator EH3
- DVPSimulator ES2
- DVPSimulator SE
- DVPSimulator SS2
- AHSIM_5x0
- AHSIM_5x1
📦 What is this software?
Commgr by Deltaww
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, manipulation of industrial processes, physical damage, or safety incidents.
Likely Case
Denial-of-service causing PLC communication disruption and production downtime in industrial environments.
If Mitigated
Limited impact if network segmentation and access controls prevent external access to vulnerable services.
🎯 Exploit Status
Multiple public exploits available (Exploit-DB 44965, 45574), weaponized tools exist in ICS attack frameworks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 1.09 or later
Vendor Advisory: https://ics-cert.us-cert.gov/advisories/ICSA-18-172-01
Restart Required: Yes
Instructions:
1. Download COMMGR version 1.09 or later from Delta Electronics support portal. 2. Stop all COMMGR and simulator services. 3. Install the updated software. 4. Restart services and verify functionality.
🔧 Temporary Workarounds
Network Segmentation
allIsolate vulnerable systems from untrusted networks using firewalls.
Port Blocking
windowsBlock access to the specific network port used by COMMGR and simulators.
netsh advfirewall firewall add rule name="Block Delta COMMGR" dir=in action=block protocol=TCP localport=PORT_NUMBER
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable systems in dedicated VLANs
- Deploy intrusion detection/prevention systems to monitor for exploit attempts
🔍 How to Verify
Check if Vulnerable:
Check COMMGR version in About dialog or registry: HKEY_LOCAL_MACHINE\SOFTWARE\Delta Electronics\COMMGR\VersionCheck Version:
reg query "HKLM\SOFTWARE\Delta Electronics\COMMGR" /v VersionVerify Fix Applied:
Verify version is 1.09 or higher and test network connectivity to ensure services still function properly.📡 Detection & Monitoring
Log Indicators:
- Application crashes in COMMGR or simulator logs
- Windows Event Logs showing service failures
Network Indicators:
- Unusual traffic to COMMGR default ports
- Malformed packets matching exploit patterns
SIEM Query:
source="COMMGR" AND (event_type="crash" OR event_type="buffer_overflow")🔗 References
- http://www.securityfocus.com/bid/104529
- https://ics-cert.us-cert.gov/advisories/ICSA-18-172-01
- https://www.exploit-db.com/exploits/44965/
- https://www.exploit-db.com/exploits/45574/
- http://www.securityfocus.com/bid/104529
- https://ics-cert.us-cert.gov/advisories/ICSA-18-172-01
- https://www.exploit-db.com/exploits/44965/
- https://www.exploit-db.com/exploits/45574/
