CVE-2023-1133
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to execute arbitrary code on Delta Electronics InfraSuite Device Master systems by sending malicious UDP packets to port 10100. The service deserializes untrusted data without validation, enabling remote code execution. All systems running InfraSuite Device Master versions before 1.0.5 are affected.
💻 Affected Systems
- Delta Electronics InfraSuite Device Master
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to install malware, pivot to other systems, disrupt industrial operations, or cause physical damage to connected equipment.
Likely Case
Remote code execution leading to data theft, ransomware deployment, or disruption of industrial control systems.
If Mitigated
Limited impact if network segmentation prevents access to vulnerable systems, though successful exploitation still compromises the affected device.
🎯 Exploit Status
Exploit code is publicly available, and the attack requires no authentication, making exploitation trivial for attackers with network access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.5
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-23-080-02
Restart Required: Yes
Instructions:
1. Download InfraSuite Device Master version 1.0.5 or later from Delta Electronics. 2. Backup current configuration. 3. Install the updated version. 4. Restart the system and verify the service is running correctly.
🔧 Temporary Workarounds
Block UDP port 10100
allBlock access to the vulnerable UDP port using network controls
Windows Firewall: New-NetFirewallRule -DisplayName "Block InfraSuite UDP" -Direction Inbound -Protocol UDP -LocalPort 10100 -Action Block
Linux iptables: iptables -A INPUT -p udp --dport 10100 -j DROP
Network segmentation
allIsolate InfraSuite Device Master systems in separate network segments with strict access controls
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable systems from untrusted networks
- Deploy intrusion detection systems to monitor for exploitation attempts on UDP port 10100
🔍 How to Verify
Check if Vulnerable:
Check if InfraSuite Device Master service is listening on UDP port 10100: netstat -an | findstr :10100 (Windows) or ss -ulpn | grep :10100 (Linux)Check Version:
Check application version in the InfraSuite Device Master interface or installation directoryVerify Fix Applied:
Verify version is 1.0.5 or later and that the service no longer deserializes untrusted UDP packets📡 Detection & Monitoring
Log Indicators:
- Unexpected process creation from Device-status service
- Abnormal network connections from InfraSuite Device Master
Network Indicators:
- UDP traffic to port 10100 from unexpected sources
- Malformed UDP packets to port 10100
SIEM Query:
source_port:10100 AND protocol:UDP AND (payload_contains:"serialized" OR size > 1024)🔗 References
- http://packetstormsecurity.com/files/172799/Delta-Electronics-InfraSuite-Device-Master-Deserialization.html
- https://www.cisa.gov/news-events/ics-advisories/icsa-23-080-02
- http://packetstormsecurity.com/files/172799/Delta-Electronics-InfraSuite-Device-Master-Deserialization.html
- https://www.cisa.gov/news-events/ics-advisories/icsa-23-080-02
