CVE-2025-48023
📋 TL;DR
A vulnerability in Yokogawa's Vnet/IP Interface Package allows remote attackers to cause denial of service by sending maliciously crafted packets. This affects industrial control systems using CENTUM VP R6 and R7 with the vulnerable software. Successful exploitation terminates the Vnet/IP software stack process, disrupting industrial operations.
💻 Affected Systems
- Vnet/IP Interface Package for CENTUM VP R6 VP6C3300
- Vnet/IP Interface Package for CENTUM VP R7 VP7C3300
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete disruption of industrial control system operations leading to production downtime, safety system impacts, or process instability in critical infrastructure environments.
Likely Case
Service interruption of Vnet/IP communications causing temporary loss of monitoring/control capabilities until process restart.
If Mitigated
Isolated impact limited to single interface with redundant systems maintaining operations.
🎯 Exploit Status
Exploitation requires crafting specific network packets but doesn't require authentication. Attackers need network access to the vulnerable interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: R1.08.00 or later
Vendor Advisory: https://web-material3.yokogawa.com/1/39281/files/YSAR-26-0002-E.pdf
Restart Required: Yes
Instructions:
1. Download updated Vnet/IP Interface Package from Yokogawa support portal. 2. Backup current configuration. 3. Install R1.08.00 or later version. 4. Restart affected systems. 5. Verify functionality.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Vnet/IP interfaces using firewalls to restrict network access to trusted sources only.
Configure firewall rules to allow only necessary IP addresses/ports to communicate with Vnet/IP interfaces
Network Monitoring
allImplement network intrusion detection to detect malicious packet patterns targeting Vnet/IP.
Deploy IDS/IPS with rules for Vnet/IP protocol anomalies
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Vnet/IP interfaces from untrusted networks
- Deploy industrial network monitoring with anomaly detection for Vnet/IP traffic patterns
🔍 How to Verify
Check if Vulnerable:
Check Vnet/IP Interface Package version in CENTUM VP system configuration or via Yokogawa system management tools.Check Version:
Check through CENTUM VP engineering station or system configuration tools (vendor-specific commands)Verify Fix Applied:
Confirm Vnet/IP Interface Package version is R1.08.00 or later and test Vnet/IP communications functionality.📡 Detection & Monitoring
Log Indicators:
- Unexpected termination of Vnet/IP software stack process
- Network interface errors or restarts
- Communication failures between CENTUM VP components
Network Indicators:
- Malformed Vnet/IP packets from untrusted sources
- Sudden drops in Vnet/IP traffic patterns
- Connection attempts to Vnet/IP ports from unauthorized IPs
SIEM Query:
source="industrial_network" AND (event_type="process_termination" AND process_name="Vnet/IP") OR (protocol="Vnet/IP" AND packet_size_anomaly=true)