CVE-2023-39269
📋 TL;DR
A denial-of-service vulnerability in the web server of multiple Siemens RUGGEDCOM industrial networking devices allows attackers to crash the web interface, potentially causing temporary unavailability. This affects numerous RUGGEDCOM switch, router, and media converter models used in industrial environments. The web server may recover after the attack ends.
💻 Affected Systems
- RUGGEDCOM i800
- RUGGEDCOM i800NC
- RUGGEDCOM i801
- RUGGEDCOM i801NC
- RUGGEDCOM i802
- RUGGEDCOM i802NC
- RUGGEDCOM i803
- RUGGEDCOM i803NC
- RUGGEDCOM M2100
- RUGGEDCOM M2100F
- RUGGEDCOM M2100NC
- RUGGEDCOM M2200
- RUGGEDCOM M2200F
- RUGGEDCOM M2200NC
- RUGGEDCOM M969
- RUGGEDCOM M969F
- RUGGEDCOM M969NC
- RUGGEDCOM RMC30
- RUGGEDCOM RMC30NC
- RUGGEDCOM RMC8388 V4.X
- RUGGEDCOM RMC8388 V5.X
- RUGGEDCOM RMC8388NC V4.X
- RUGGEDCOM RMC8388NC V5.X
- RUGGEDCOM RP110
- RUGGEDCOM RP110NC
- RUGGEDCOM RS1600
- RUGGEDCOM RS1600F
- RUGGEDCOM RS1600FNC
- RUGGEDCOM RS1600NC
- RUGGEDCOM RS1600T
- RUGGEDCOM RS1600TNC
- RUGGEDCOM RS400
- RUGGEDCOM RS400F
- RUGGEDCOM RS400NC
- RUGGEDCOM RS401
- RUGGEDCOM RS401NC
- RUGGEDCOM RS416
- RUGGEDCOM RS416F
- RUGGEDCOM RS416NC
- RUGGEDCOM RS416NCv2 V4.X
- RUGGEDCOM RS416NCv2 V5.X
- RUGGEDCOM RS416P
- RUGGEDCOM RS416PF
- RUGGEDCOM RS416PNC
- RUGGEDCOM RS416PNCv2 V4.X
- RUGGEDCOM RS416PNCv2 V5.X
- RUGGEDCOM RS416Pv2 V4.X
- RUGGEDCOM RS416Pv2 V5.X
- RUGGEDCOM RS416v2 V4.X
- RUGGEDCOM RS416v2 V5.X
- RUGGEDCOM RS8000
- RUGGEDCOM RS8000A
- RUGGEDCOM RS8000ANC
- RUGGEDCOM RS8000H
- RUGGEDCOM RS8000HNC
- RUGGEDCOM RS8000NC
- RUGGEDCOM RS8000T
- RUGGEDCOM RS8000TNC
- RUGGEDCOM RS900
- RUGGEDCOM RS900 (32M) V4.X
- RUGGEDCOM RS900 (32M) V5.X
- RUGGEDCOM RS900F
- RUGGEDCOM RS900G
- RUGGEDCOM RS900G (32M) V4.X
- RUGGEDCOM RS900G (32M) V5.X
- RUGGEDCOM RS900GF
- RUGGEDCOM RS900GNC
- RUGGEDCOM RS900GNC(32M) V4.X
- RUGGEDCOM RS900GNC(32M) V5.X
- RUGGEDCOM RS900GP
- RUGGEDCOM RS900GPF
- RUGGEDCOM RS900GPNC
- RUGGEDCOM RS900L
- RUGGEDCOM RS900LNC
- RUGGEDCOM RS900M-GETS-C01
- RUGGEDCOM RS900M-GETS-XX
- RUGGEDCOM RS900M-STND-C01
- RUGGEDCOM RS900M-STND-XX
- RUGGEDCOM RS900MNC-GETS-C01
- RUGGEDCOM RS900MNC-GETS-XX
- RUGGEDCOM RS900MNC-STND-XX
- RUGGEDCOM RS900MNC-STND-XX-C01
- RUGGEDCOM RS900NC
- RUGGEDCOM RS900NC(32M) V4.X
- RUGGEDCOM RS900NC(32M) V5.X
- RUGGEDCOM RS900W
- RUGGEDCOM RS910
- RUGGEDCOM RS910L
- RUGGEDCOM RS910LNC
- RUGGEDCOM RS910NC
- RUGGEDCOM RS910W
- RUGGEDCOM RS920L
- RUGGEDCOM RS920LNC
- RUGGEDCOM RS920W
- RUGGEDCOM RS930L
- RUGGEDCOM RS930LNC
- RUGGEDCOM RS930W
- RUGGEDCOM RS940G
- RUGGEDCOM RS940GF
- RUGGEDCOM RS940GNC
- RUGGEDCOM RS969
- RUGGEDCOM RS969NC
- RUGGEDCOM RSG2100
- RUGGEDCOM RSG2100 (32M) V4.X
- RUGGEDCOM RSG2100 (32M) V5.X
- RUGGEDCOM RSG2100F
- RUGGEDCOM RSG2100NC
- RUGGEDCOM RSG2100NC(32M) V4.X
- RUGGEDCOM RSG2100NC(32M) V5.X
- RUGGEDCOM RSG2100P
- RUGGEDCOM RSG2100P (32M) V4.X
- RUGGEDCOM RSG2100P (32M) V5.X
- RUGGEDCOM RSG2100PF
- RUGGEDCOM RSG2100PNC
- RUGGEDCOM RSG2100PNC (32M) V4.X
- RUGGEDCOM RSG2100PNC (32M) V5.X
- RUGGEDCOM RSG2200
- RUGGEDCOM RSG2200F
- RUGGEDCOM RSG2200NC
- RUGGEDCOM RSG2288 V4.X
- RUGGEDCOM RSG2288 V5.X
- RUGGEDCOM RSG2288NC V4.X
- RUGGEDCOM RSG2288NC V5.X
- RUGGEDCOM RSG2300 V4.X
- RUGGEDCOM RSG2300 V5.X
- RUGGEDCOM RSG2300F
- RUGGEDCOM RSG2300NC V4.X
- RUGGEDCOM RSG2300NC V5.X
- RUGGEDCOM RSG2300P V4.X
- RUGGEDCOM RSG2300P V5.X
- RUGGEDCOM RSG2300PF
- RUGGEDCOM RSG2300PNC V4.X
- RUGGEDCOM RSG2300PNC V5.X
- RUGGEDCOM RSG2488 V4.X
- RUGGEDCOM RSG2488 V5.X
- RUGGEDCOM RSG2488F
- RUGGEDCOM RSG2488NC V4.X
- RUGGEDCOM RSG2488NC V5.X
- RUGGEDCOM RSG907R
- RUGGEDCOM RSG908C
- RUGGEDCOM RSG909R
- RUGGEDCOM RSG910C
- RUGGEDCOM RSG920P V4.X
- RUGGEDCOM RSG920P V5.X
- RUGGEDCOM RSG920PNC V4.X
- RUGGEDCOM RSG920PNC V5.X
- RUGGEDCOM RSL910
- RUGGEDCOM RSL910NC
- RUGGEDCOM RST2228
- RUGGEDCOM RST2228P
- RUGGEDCOM RST916C
- RUGGEDCOM RST916P
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete unavailability of the web management interface, potentially disrupting remote configuration and monitoring capabilities for industrial networks.
Likely Case
Temporary loss of web-based management access requiring local console access or waiting for automatic recovery.
If Mitigated
Minimal operational impact if web interface is not critical for operations or if alternative management methods are available.
🎯 Exploit Status
Based on CVSS score and description, exploitation appears straightforward for unauthenticated attackers targeting the web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Siemens advisory for specific firmware updates per product
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-770902.html
Restart Required: Yes
Instructions:
1. Identify affected RUGGEDCOM device models and current firmware versions
2. Download appropriate firmware updates from Siemens support portal
3. Follow Siemens firmware update procedures for industrial devices
4. Test updates in non-production environment first
5. Schedule maintenance window for production updates
6. Verify web interface functionality post-update
🔧 Temporary Workarounds
Restrict Web Interface Access
allLimit access to the web management interface using network controls
Configure firewall rules to restrict web interface access to trusted management networks only
Implement IP whitelisting for web interface if supported
Use Alternative Management Methods
allUtilize CLI, SNMP, or other management protocols instead of web interface
Configure and use serial console or SSH for management
Set up SNMP monitoring instead of web-based monitoring
🧯 If You Can't Patch
- Isolate affected devices in network segments with strict access controls
- Implement network monitoring for web interface DoS attempts and anomalous traffic patterns
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against Siemens advisory and verify web interface is accessibleCheck Version:
Check via web interface System Information page or CLI command 'show version'Verify Fix Applied:
After patching, verify web interface remains responsive under normal conditions and check firmware version matches patched release📡 Detection & Monitoring
Log Indicators:
- Web server crash logs
- Repeated connection attempts to web interface
- Web interface becoming unresponsive
Network Indicators:
- Unusual volume of HTTP requests to device management IP
- Web interface timeout responses
SIEM Query:
source="RUGGEDCOM" AND (event="web_server_crash" OR http_response_code="503" OR http_response_code="500")