CVE-2023-34348
📋 TL;DR
This vulnerability allows unauthenticated attackers to remotely crash the PI Message Subsystem in AVEVA PI Server, causing denial-of-service. It affects industrial control systems using vulnerable versions of AVEVA PI Server, potentially disrupting data collection and monitoring in critical infrastructure environments.
💻 Affected Systems
- AVEVA PI Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete disruption of PI Server message processing, halting industrial data collection and monitoring across an entire facility, potentially affecting safety systems and operational visibility.
Likely Case
Temporary denial-of-service affecting PI Message Subsystem functionality, disrupting real-time data flow between industrial devices and monitoring systems until service is restored.
If Mitigated
Limited impact with proper network segmentation and access controls preventing unauthenticated access to vulnerable services.
🎯 Exploit Status
CISA advisory indicates unauthenticated remote exploitation is possible; exploit details not publicly disclosed but vulnerability is relatively straightforward to trigger.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply updates beyond 2023 and 2018 SP3 P05 versions
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-24-018-01
Restart Required: Yes
Instructions:
1. Download latest PI Server updates from AVEVA support portal. 2. Backup current configuration and data. 3. Apply patches following vendor documentation. 4. Restart PI Server services. 5. Verify functionality.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to PI Server to only trusted internal networks and required clients
Configure firewall rules to block external/untrusted access to PI Server ports (typically 5450, 5451)
Service Hardening
windowsRun PI Server with minimal privileges and implement additional authentication layers
Configure Windows service to run under limited account
Implement network-level authentication if supported
🧯 If You Can't Patch
- Implement strict network segmentation to isolate PI Server from untrusted networks
- Deploy intrusion detection/prevention systems to monitor for DoS attempts against PI Server services
🔍 How to Verify
Check if Vulnerable:
Check PI Server version in PI System Management Tools or registry: HKEY_LOCAL_MACHINE\SOFTWARE\PISystem\PI-AF\Server\VersionCheck Version:
reg query "HKLM\SOFTWARE\PISystem\PI-AF\Server" /v VersionVerify Fix Applied:
Verify PI Server version is updated beyond vulnerable versions and test PI Message Subsystem functionality📡 Detection & Monitoring
Log Indicators:
- PI Server service crashes
- PI Message Subsystem errors in Windows Event Logs
- Unusual connection attempts to PI Server ports
Network Indicators:
- Multiple connection attempts to PI Server ports (5450/5451) from unauthenticated sources
- Abnormal traffic patterns to PI Server
SIEM Query:
source="PI_Server_Logs" AND (event_id="7034" OR message="crash" OR message="denial")