CVE-2023-23585
📋 TL;DR
CVE-2023-23585 is a critical heap overflow vulnerability in Honeywell Experion servers that allows remote attackers to cause denial of service (DoS) by sending specially crafted messages. This affects systems running vulnerable versions of Honeywell Experion software. Attackers can crash the server, disrupting industrial control operations.
💻 Affected Systems
- Honeywell Experion Process Knowledge System (PKS)
📦 What is this software?
Direct Station by Honeywell
Direct Station by Honeywell
Direct Station by Honeywell
Experion Server by Honeywell
Experion Server by Honeywell
Experion Server by Honeywell
Experion Server by Honeywell
Experion Server by Honeywell
⚠️ Risk & Real-World Impact
Worst Case
Complete system crash leading to prolonged downtime of industrial control systems, potentially affecting safety-critical operations in manufacturing, energy, or infrastructure sectors.
Likely Case
Service disruption and denial of service affecting process control operations, requiring manual intervention and system restart.
If Mitigated
Limited impact with proper network segmentation and access controls preventing exploitation attempts from reaching vulnerable systems.
🎯 Exploit Status
The vulnerability requires sending a specially crafted message but does not require authentication, making exploitation straightforward for attackers with network access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Specific patched versions available through Honeywell Security Notification
Vendor Advisory: https://process.honeywell.com
Restart Required: Yes
Instructions:
1. Review Honeywell Security Notification for affected versions and patches. 2. Apply recommended updates from Honeywell. 3. Restart Experion servers after patching. 4. Verify system functionality post-update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Experion servers from untrusted networks and restrict access to authorized systems only.
Firewall Rules
allImplement strict firewall rules to block unnecessary traffic to Experion server ports.
🧯 If You Can't Patch
- Implement strict network access controls to limit which systems can communicate with Experion servers
- Monitor for unusual traffic patterns or connection attempts to Experion server ports
🔍 How to Verify
Check if Vulnerable:
Check Experion server version against Honeywell Security Notification for affected versions. Review system logs for crash events related to message handling.Check Version:
Check Experion PKS version through system administration interface or consult Honeywell documentation for version checking procedures.Verify Fix Applied:
Verify installed version matches patched versions listed in Honeywell advisory. Test system stability under normal operation.📡 Detection & Monitoring
Log Indicators:
- Experion server crash logs
- Unexpected service termination events
- Memory allocation failure messages
Network Indicators:
- Unusual traffic patterns to Experion server ports
- Multiple connection attempts with malformed packets
SIEM Query:
source="experion_server" AND (event_type="crash" OR event_type="service_stop")