CVE-2023-36389
📋 TL;DR
A reflected cross-site scripting (XSS) vulnerability in Siemens RUGGEDCOM ROX devices allows attackers to execute malicious JavaScript by tricking users into clicking specially crafted links. This affects multiple RUGGEDCOM ROX router models running firmware versions below V2.16.0. The vulnerability occurs when malformed input is reflected without sanitization in error messages.
💻 Affected Systems
- RUGGEDCOM ROX MX5000
- RUGGEDCOM ROX MX5000RE
- RUGGEDCOM ROX RX1400
- RUGGEDCOM ROX RX1500
- RUGGEDCOM ROX RX1501
- RUGGEDCOM ROX RX1510
- RUGGEDCOM ROX RX1511
- RUGGEDCOM ROX RX1512
- RUGGEDCOM ROX RX1524
- RUGGEDCOM ROX RX1536
- RUGGEDCOM ROX RX5000
📦 What is this software?
Ruggedcom Rox Mx5000re Firmware by Siemens
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, redirect to malicious sites, or install malware on user systems accessing the web interface.
Likely Case
Session hijacking, credential theft, or unauthorized actions performed through the authenticated user's session.
If Mitigated
Limited impact if proper network segmentation, web application firewalls, and user awareness training are implemented.
🎯 Exploit Status
Exploitation requires user interaction (clicking malicious link) but no authentication to the device.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V2.16.0
Vendor Advisory: https://cert-portal.siemens.com/productcert/pdf/ssa-146325.pdf
Restart Required: Yes
Instructions:
1. Download firmware V2.16.0 or later from Siemens support portal. 2. Backup current configuration. 3. Upload and install new firmware via web interface or CLI. 4. Reboot device. 5. Verify firmware version.
🔧 Temporary Workarounds
Disable Web Interface
allDisable the vulnerable web interface if not required for operations.
Configure via CLI: no web-server enable
Network Segmentation
allRestrict access to web interface to trusted networks only.
Configure firewall rules to limit access to management IPs
🧯 If You Can't Patch
- Implement web application firewall (WAF) with XSS protection rules
- Enable Content Security Policy (CSP) headers if supported
- User awareness training about phishing links
- Monitor for suspicious web requests to device interfaces
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface or CLI command: show versionCheck Version:
show versionVerify Fix Applied:
Verify firmware version is V2.16.0 or higher using: show version📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests with script tags or JavaScript in URL parameters
- Multiple failed login attempts following suspicious URL access
- Error logs containing 'invalid path' with unusual characters
Network Indicators:
- HTTP requests containing <script> tags or JavaScript in query strings
- Traffic to device web interface from unexpected sources
SIEM Query:
source="device_logs" AND ("invalid path" OR "<script>" OR "javascript:")