CVE-2025-48020
📋 TL;DR
A vulnerability in Yokogawa's Vnet/IP Interface Package allows remote attackers to cause denial of service by sending maliciously crafted packets, which can terminate the Vnet/IP software stack process. This affects industrial control systems using CENTUM VP R6 and R7 with the vulnerable interface package. The vulnerability requires network access to the affected systems.
💻 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 Vnet/IP communication leading to industrial process downtime, potential safety implications in critical infrastructure environments.
Likely Case
Service interruption requiring manual restart of affected Vnet/IP processes, temporary loss of monitoring/control capabilities.
If Mitigated
Isolated impact limited to specific network segments with proper segmentation and monitoring.
🎯 Exploit Status
Exploitation requires network access to vulnerable systems. No authentication needed to trigger the vulnerability.
🛠️ 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. Follow vendor installation procedures for CENTUM VP systems. 3. Apply to all affected systems. 4. Restart affected services/systems as required.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Vnet/IP systems from untrusted networks using firewalls and network segmentation
Access Control Lists
allImplement strict network ACLs to limit which systems can communicate with Vnet/IP interfaces
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Vnet/IP systems from untrusted networks
- Deploy intrusion detection systems to monitor for malicious packet patterns targeting Vnet/IP services
🔍 How to Verify
Check if Vulnerable:
Check Vnet/IP Interface Package version in CENTUM VP system configuration or via vendor diagnostic toolsCheck Version:
Use CENTUM VP system utilities or check package version in system configuration filesVerify Fix Applied:
Verify Vnet/IP Interface Package version is R1.08.00 or later and test system functionality📡 Detection & Monitoring
Log Indicators:
- Unexpected Vnet/IP process termination
- Service restart events
- Connection attempts from unusual sources
Network Indicators:
- Malformed packets to Vnet/IP ports
- Increased traffic to industrial control network segments
SIEM Query:
source="industrial_network" AND (event_type="process_termination" OR event_type="service_restart") AND process_name="Vnet/IP"