CVE-2024-47902
📋 TL;DR
This vulnerability allows unauthenticated attackers to execute operating system commands via unauthenticated GET requests to the web server in affected InterMesh devices. It affects InterMesh 7177 Hybrid 2.0 Subscriber (all versions before V8.2.12) and InterMesh 7707 Fire Subscriber (versions before V7.2.12 only when IP interface is enabled).
💻 Affected Systems
- InterMesh 7177 Hybrid 2.0 Subscriber
- InterMesh 7707 Fire Subscriber
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data exfiltration, or device takeover for malicious purposes.
Likely Case
Unauthenticated command execution allowing attackers to run system commands like ping, potentially leading to information disclosure or further exploitation.
If Mitigated
Limited impact if proper network segmentation and access controls prevent external access to vulnerable interfaces.
🎯 Exploit Status
Exploitation requires sending unauthenticated GET requests to specific endpoints that execute OS commands.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: InterMesh 7177: V8.2.12 or later; InterMesh 7707: V7.2.12 or later
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-333468.html
Restart Required: Yes
Instructions:
1. Download latest firmware from Siemens support portal. 2. Backup current configuration. 3. Apply firmware update via web interface or CLI. 4. Reboot device. 5. Verify version is updated.
🔧 Temporary Workarounds
Disable IP Interface
allFor InterMesh 7707 Fire Subscriber, disable the IP interface if not required.
Configuration via web interface or CLI to disable IP interface
Network Access Control
linuxRestrict network access to InterMesh web interfaces using firewall rules.
iptables -A INPUT -p tcp --dport 80 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Isolate affected devices in separate network segments with strict access controls.
- Implement network monitoring and intrusion detection for suspicious GET requests to device web interfaces.
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or CLI. For InterMesh 7707, verify if IP interface is enabled.Check Version:
Check via device web interface or use manufacturer-specific CLI commands for version information.Verify Fix Applied:
Confirm firmware version is V8.2.12 or later for 7177, or V7.2.12 or later for 7707. Test that unauthenticated GET requests to command execution endpoints are rejected.📡 Detection & Monitoring
Log Indicators:
- Unauthenticated GET requests to command execution endpoints
- Unusual command execution patterns in system logs
Network Indicators:
- Unusual GET requests to device web interfaces from untrusted sources
- Traffic patterns indicating command execution attempts
SIEM Query:
source_ip NOT IN trusted_networks AND destination_port IN (80,443) AND http_method="GET" AND (uri CONTAINS "ping" OR uri CONTAINS "cmd")