CVE-2024-37038
📋 TL;DR
This vulnerability allows authenticated users with web interface access to perform unauthorized file and firmware uploads by crafting custom web requests. It affects Schneider Electric devices with incorrect default permissions. Attackers could upload malicious files or firmware to compromise device integrity.
💻 Affected Systems
- Schneider Electric devices with web interface (specific models not detailed in provided references)
📦 What is this software?
Sage Rtu Firmware by Schneider Electric
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise through malicious firmware upload leading to persistent backdoor, data theft, or disruption of industrial operations.
Likely Case
Unauthorized file upload allowing attackers to plant malware, modify configurations, or disrupt normal device operations.
If Mitigated
Limited impact with proper access controls, network segmentation, and monitoring in place.
🎯 Exploit Status
Exploitation requires authenticated access to web interface and ability to craft custom HTTP requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific fixed versions
Vendor Advisory: https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2024-163-05&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2024-163-05.pdf
Restart Required: Yes
Instructions:
1. Review vendor advisory SEVD-2024-163-05. 2. Identify affected devices. 3. Apply vendor-provided firmware updates. 4. Restart devices as required. 5. Verify permissions are correctly set post-update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices from untrusted networks and limit access to authorized users only.
Access Control Hardening
allImplement strict authentication and authorization controls for web interface access.
🧯 If You Can't Patch
- Implement network segmentation to isolate affected devices
- Enforce strict access controls and monitor for unauthorized upload attempts
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against vendor advisory. Test if authenticated users can upload files via crafted web requests.Check Version:
Check device web interface or CLI for firmware version (vendor-specific command)Verify Fix Applied:
Verify firmware version matches patched version from vendor. Test that file/firmware uploads require proper authorization.📡 Detection & Monitoring
Log Indicators:
- Unusual file upload events
- Firmware update attempts from unauthorized users
- HTTP POST requests to upload endpoints
Network Indicators:
- Unexpected file transfers to device web interface
- Unusual HTTP traffic patterns to device management ports
SIEM Query:
source="device_logs" AND (event="file_upload" OR event="firmware_update") AND user NOT IN authorized_users