CVE-2014-5435
📋 TL;DR
This vulnerability allows attackers to write arbitrary memory in Honeywell Experion PKS dual_onsrv.exe module, potentially leading to remote code execution or denial of service. It affects Honeywell Experion PKS R40x before R400.6, R41x before R410.6, and R43x before R430.2. Customers running unsupported versions prior to R400 are particularly at risk.
💻 Affected Systems
- Honeywell Experion PKS
📦 What is this software?
Experion Process Knowledge System by Honeywell
Experion Process Knowledge System by Honeywell
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker gains full control of the Experion PKS system, potentially disrupting industrial operations or compromising safety systems.
Likely Case
Remote code execution leading to system compromise, data theft, or denial of service affecting industrial control operations.
If Mitigated
Limited impact if system is isolated, properly segmented, and has additional security controls in place.
🎯 Exploit Status
CVSS 9.8 indicates critical severity with network attack vector and no authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: R400.6, R410.6, R430.2 or later
Vendor Advisory: https://ics-cert.us-cert.gov/advisories/ICSA-14-352-01
Restart Required: Yes
Instructions:
1. Upgrade to supported version R400.6, R410.6, or R430.2 or later. 2. Apply patches through Honeywell update mechanisms. 3. Restart affected systems. 4. Verify patch installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Experion PKS systems from untrusted networks and internet access
Firewall Rules
allRestrict network access to dual_onsrv.exe service ports
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to isolate vulnerable systems
- Monitor network traffic for unusual patterns and implement intrusion detection systems
🔍 How to Verify
Check if Vulnerable:
Check Experion PKS version against affected ranges: R40x before R400.6, R41x before R410.6, R43x before R430.2Check Version:
Check through Experion PKS administration interface or system propertiesVerify Fix Applied:
Verify system is running R400.6, R410.6, R430.2 or later version📡 Detection & Monitoring
Log Indicators:
- Unusual process creation by dual_onsrv.exe
- Memory access violations
- Unexpected service restarts
Network Indicators:
- Unusual traffic to dual_onsrv.exe service ports
- Network connections from unexpected sources
SIEM Query:
source="experion" AND (process="dual_onsrv.exe" AND event_type="memory_access") OR (port=* AND dest_ip="experion_host")