CVE-2017-9629
📋 TL;DR
A stack-based buffer overflow vulnerability in Schneider Electric Wonderware ArchestrA Logger allows remote attackers to execute arbitrary code with high privileges. This affects versions 2017.426.2307.1 and earlier. Organizations using this industrial control system software for logging are at risk.
💻 Affected Systems
- Schneider Electric Wonderware ArchestrA Logger
📦 What is this software?
Wonderware Archestra Logger by Schneider Electric
⚠️ Risk & Real-World Impact
Worst Case
Remote unauthenticated attacker gains full system control, potentially compromising industrial control systems, manipulating processes, or establishing persistent access.
Likely Case
Attacker executes arbitrary code to disrupt logging operations, steal sensitive industrial data, or pivot to other systems in the network.
If Mitigated
With proper network segmentation and access controls, impact is limited to the logging system without affecting critical control functions.
🎯 Exploit Status
CVSS 9.8 indicates critical severity with network-based exploitation without authentication. No public exploit code was found in references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 2017.426.2307.1
Vendor Advisory: http://software.schneider-electric.com/pdf/security-bulletin/lfsec00000116/
Restart Required: Yes
Instructions:
1. Download updated version from Schneider Electric support portal. 2. Backup current configuration. 3. Install update following vendor documentation. 4. Restart the Logger service.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Wonderware ArchestrA Logger from untrusted networks and internet access
Access Control Restrictions
allImplement strict firewall rules to limit connections to Logger service
🧯 If You Can't Patch
- Implement network segmentation to isolate Logger from untrusted networks
- Deploy intrusion detection systems to monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check Wonderware ArchestrA Logger version in application interface or installation directoryCheck Version:
Check application interface or installation propertiesVerify Fix Applied:
Verify version is newer than 2017.426.2307.1 and check vendor advisory for specific fixed version📡 Detection & Monitoring
Log Indicators:
- Unusual process creation from Logger service
- Buffer overflow errors in application logs
- Unexpected network connections to Logger port
Network Indicators:
- Unusual traffic patterns to Logger service port
- Exploit-like payloads in network traffic
SIEM Query:
source="wonderware_logs" AND (event_type="buffer_overflow" OR process_name="unusual_executable")🔗 References
- http://software.schneider-electric.com/pdf/security-bulletin/lfsec00000116/
- http://www.securityfocus.com/bid/99488
- http://www.securitytracker.com/id/1038836
- https://ics-cert.us-cert.gov/advisories/ICSA-17-187-04
- http://software.schneider-electric.com/pdf/security-bulletin/lfsec00000116/
- http://www.securityfocus.com/bid/99488
- http://www.securitytracker.com/id/1038836
- https://ics-cert.us-cert.gov/advisories/ICSA-17-187-04
