CVE-2023-29023
📋 TL;DR
A cross-site scripting (XSS) vulnerability in Rockwell Automation's ArmorStart ST product allows attackers to inject malicious scripts into web pages. This could enable viewing or modifying sensitive data or causing denial of service. Users of ArmorStart ST products with web interfaces are affected.
💻 Affected Systems
- Rockwell Automation ArmorStart ST
📦 What is this software?
Armorstart St 281e Firmware by Rockwellautomation
Armorstart St 284ee Firmware by Rockwellautomation
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal credentials, manipulate device configurations, or render the web interface unusable, potentially disrupting industrial operations.
Likely Case
Attackers would use phishing to trick users into clicking malicious links, leading to session hijacking or data theft from the web interface.
If Mitigated
With proper network segmentation and user awareness, exploitation would be limited to isolated incidents with minimal operational impact.
🎯 Exploit Status
Exploitation requires user interaction (e.g., phishing); no public exploit code known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Rockwell Automation advisory for specific firmware updates
Vendor Advisory: https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1139438
Restart Required: Yes
Instructions:
1. Review Rockwell Automation advisory. 2. Download and apply recommended firmware updates. 3. Restart affected devices as required.
🔧 Temporary Workarounds
Network Segmentation
allIsolate ArmorStart ST devices from untrusted networks to reduce attack surface.
User Awareness Training
allEducate users to avoid clicking suspicious links in the web interface.
🧯 If You Can't Patch
- Implement strict network access controls to limit web interface exposure.
- Use web application firewalls (WAFs) to filter malicious input.
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against Rockwell Automation advisory; if unpatched and web interface is accessible, assume vulnerable.Check Version:
Consult device documentation or web interface for firmware version details.Verify Fix Applied:
Confirm firmware version matches patched version in advisory and test web interface functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual web requests with script tags or encoded payloads in device logs
Network Indicators:
- HTTP requests containing suspicious JavaScript or HTML to device web ports
SIEM Query:
Search for web logs from ArmorStart ST devices with patterns like '<script>' or 'javascript:' in URI or parameters.