CVE-2024-47904
📋 TL;DR
This vulnerability allows authenticated local attackers to execute arbitrary commands with root privileges on 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). Attackers need local access to the device to exploit this privilege escalation flaw.
💻 Affected Systems
- InterMesh 7177 Hybrid 2.0 Subscriber
- InterMesh 7707 Fire Subscriber
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An authenticated attacker gains full root access to the device, enabling complete system compromise, data theft, persistence establishment, and potential lateral movement to other network systems.
Likely Case
Malicious insiders or attackers with initial access escalate privileges to root, allowing them to install backdoors, modify configurations, or disrupt services on the affected device.
If Mitigated
With proper access controls and monitoring, exploitation attempts are detected and contained before significant damage occurs, limiting impact to the single compromised device.
🎯 Exploit Status
Requires authenticated local access. Exploitation involves abusing SUID binary to escalate privileges.
🛠️ 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 the firmware update from Siemens support portal. 2. Backup current configuration. 3. Apply firmware update following vendor instructions. 4. Reboot device. 5. Verify successful update and restore configuration if needed.
🔧 Temporary Workarounds
Disable IP Interface (7707 only)
linuxFor InterMesh 7707 devices, disable the IP interface to mitigate vulnerability if not required for operation.
Consult vendor documentation for specific IP interface disable commands
Restrict Local Access
allImplement strict access controls to limit who can authenticate to affected devices.
Configure strong authentication mechanisms
Implement network segmentation
Use jump hosts for administrative access
🧯 If You Can't Patch
- Implement strict access controls to limit local authentication to trusted users only.
- Monitor for suspicious privilege escalation attempts and unauthorized SUID binary execution.
🔍 How to Verify
Check if Vulnerable:
Check device version via web interface or CLI. For InterMesh 7177: verify version < V8.2.12. For InterMesh 7707: verify version < V7.2.12 AND IP interface is enabled.Check Version:
Consult vendor documentation for device-specific version check commands (typically via web interface or CLI commands like 'show version').Verify Fix Applied:
After patching, confirm device version meets minimum requirements: InterMesh 7177 ≥ V8.2.12, InterMesh 7707 ≥ V7.2.12.📡 Detection & Monitoring
Log Indicators:
- Unusual SUID binary execution
- Privilege escalation attempts
- Unexpected root-level command execution
- Authentication from unusual sources
Network Indicators:
- Unusual administrative traffic patterns
- Unexpected outbound connections from affected devices
SIEM Query:
Example: (event_type="privilege_escalation" OR process_name="suid_binary_name") AND (device_model="InterMesh 7177" OR device_model="InterMesh 7707")