CVE-2024-5680
📋 TL;DR
A local privilege escalation vulnerability in the Foxboro.sys driver allows authenticated attackers to cause denial-of-service through improper array index validation. This affects systems running Schneider Electric Foxboro software with vulnerable driver versions. Attackers need local user access to exploit this vulnerability.
💻 Affected Systems
- Schneider Electric Foxboro Control Systems
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system crash or kernel panic leading to sustained denial-of-service, requiring physical intervention to restore functionality.
Likely Case
Temporary system instability or application crashes affecting Foxboro control system operations until system restart.
If Mitigated
Minimal impact with proper access controls preventing unauthorized local users from executing malicious IOCTL calls.
🎯 Exploit Status
Requires local user access and ability to craft specific IOCTL calls; driver-level exploitation requires understanding of kernel interactions
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Schneider Electric advisory SEVD-2024-191-02 for specific patched versions
Vendor Advisory: https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2024-191-02&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2024-191-02.pdf
Restart Required: Yes
Instructions:
1. Download patch from Schneider Electric portal 2. Backup system 3. Apply patch following vendor instructions 4. Restart system 5. Verify driver version
🔧 Temporary Workarounds
Restrict Local User Access
windowsLimit local user accounts and implement least privilege access controls
Driver Permission Hardening
windowsModify driver permissions to restrict non-administrative IOCTL access
sc sdset Foxboro D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)
🧯 If You Can't Patch
- Implement strict access controls to prevent unauthorized local user execution
- Monitor for unusual driver IOCTL activity and system crashes
🔍 How to Verify
Check if Vulnerable:
Check Foxboro.sys driver version and compare against patched versions in vendor advisoryCheck Version:
driverquery /v | findstr FoxboroVerify Fix Applied:
Verify driver version matches patched version from vendor advisory and test system stability📡 Detection & Monitoring
Log Indicators:
- System crashes, kernel panics, unexpected driver restarts
- Event ID 41 (Kernel-Power) with bugcheck codes
- Increased IOCTL calls to Foxboro.sys
Network Indicators:
- Not applicable - local exploitation only
SIEM Query:
EventID=41 OR (Source="System" AND EventID=7036 AND "Foxboro") OR (EventID=4663 AND ObjectName="*Foxboro*")