CVE-2023-36752
📋 TL;DR
This vulnerability allows authenticated privileged remote attackers to execute arbitrary code with root privileges on affected RUGGEDCOM ROX devices. The command injection occurs through the upgrade-app URL parameter in the web interface due to missing server-side input sanitation. All versions below V2.16.0 of multiple RUGGEDCOM ROX router models are affected.
💻 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
Complete system compromise with root-level access, allowing attackers to install persistent backdoors, exfiltrate sensitive data, disrupt industrial operations, or pivot to other network segments.
Likely Case
Privileged authenticated attackers gaining full control of affected devices, potentially disrupting critical infrastructure operations or using devices as footholds for lateral movement.
If Mitigated
Limited impact if proper network segmentation, authentication controls, and monitoring are in place to detect and block exploitation attempts.
🎯 Exploit Status
Exploitation requires authenticated privileged access. The vulnerability is in a web interface parameter, making it relatively straightforward to exploit once credentials are obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V2.16.0 or later
Vendor Advisory: https://cert-portal.siemens.com/productcert/pdf/ssa-146325.pdf
Restart Required: Yes
Instructions:
1. Download firmware version V2.16.0 or later from Siemens support portal. 2. Backup device configuration. 3. Upload and install the new firmware through the web interface or CLI. 4. Verify successful upgrade and restore configuration if needed.
🔧 Temporary Workarounds
Disable Web Interface
allDisable the web interface to prevent exploitation through this attack vector
# Via CLI: configure terminal
# disable web-server
Restrict Network Access
allLimit access to the web interface to trusted management networks only
# Configure firewall rules to restrict access to management IPs
# Example: iptables -A INPUT -p tcp --dport 443 -s trusted_ip -j ACCEPT
# iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices from untrusted networks
- Enforce strong authentication policies and regularly rotate privileged credentials
🔍 How to Verify
Check if Vulnerable:
Check device firmware version through web interface (System > About) or CLI (show version). If version is below V2.16.0, device is vulnerable.Check Version:
show versionVerify Fix Applied:
Verify firmware version is V2.16.0 or higher. Test the upgrade-app functionality with safe input to ensure proper input validation.📡 Detection & Monitoring
Log Indicators:
- Unusual upgrade-app parameter values in web server logs
- Multiple failed authentication attempts followed by successful login and upgrade-app access
- Commands execution in system logs not initiated by administrators
Network Indicators:
- Unusual outbound connections from affected devices
- Traffic patterns indicating command and control activity
- Unexpected firmware upgrade attempts
SIEM Query:
source="web_logs" AND (url="*upgrade-app*" AND NOT url="*expected_pattern*") OR (event="authentication_success" AND src_ip="untrusted_network" AND subsequent_event="upgrade_app_access")