CVE-2024-56836
📋 TL;DR
This vulnerability in Siemens RUGGEDCOM ROX devices allows attackers to inject additional configuration parameters during Dynamic DNS setup. Under certain conditions, this can lead to remote code execution with root privileges. All versions below V2.17.0 of multiple RUGGEDCOM ROX 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?
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains root access to the device, enabling complete system compromise, data exfiltration, and potential lateral movement within the network.
Likely Case
Remote code execution leading to unauthorized access, configuration changes, and potential disruption of industrial operations.
If Mitigated
Limited impact if proper network segmentation and access controls prevent exploitation attempts.
🎯 Exploit Status
Exploitation requires specific conditions and knowledge of the Dynamic DNS configuration, but no authentication is needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V2.17.0
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-912274.html
Restart Required: Yes
Instructions:
1. Download V2.17.0 firmware from Siemens support portal. 2. Backup current configuration. 3. Upload and install firmware update via web interface or CLI. 4. Reboot device. 5. Verify version is V2.17.0 or higher.
🔧 Temporary Workarounds
Disable Dynamic DNS
allRemove or disable Dynamic DNS configuration on affected devices
# Via web interface: Navigate to Network > Dynamic DNS and disable
# Via CLI: configure dynamic-dns disable
Restrict Network Access
linuxLimit access to Dynamic DNS configuration interface using firewall rules
# Example iptables rule: iptables -A INPUT -p tcp --dport [DDNS_PORT] -j DROP
# Replace [DDNS_PORT] with actual port used for Dynamic DNS
🧯 If You Can't Patch
- Isolate affected devices in separate network segments with strict access controls
- Implement network monitoring and intrusion detection for suspicious Dynamic DNS activity
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface (System > About) or CLI command 'show version'Check Version:
show versionVerify Fix Applied:
Confirm firmware version is V2.17.0 or higher and test Dynamic DNS functionality📡 Detection & Monitoring
Log Indicators:
- Unusual Dynamic DNS configuration changes
- Unexpected reverse shell connections
- Unauthorized configuration modifications
Network Indicators:
- Suspicious outbound connections from device following Dynamic DNS updates
- Unexpected traffic to/from Dynamic DNS ports
SIEM Query:
source="RUGGEDCOM" AND (event_type="config_change" AND config_field="dynamic_dns") OR (process="reverse_shell")