CVE-2023-27975
📋 TL;DR
This vulnerability allows a local attacker with access to the engineering workstation to tamper with memory and gain unauthorized access to project files in EcoStruxure Control Expert. It affects users of Schneider Electric's industrial control system software who haven't applied security patches. The attack requires local access to the workstation running the vulnerable software.
💻 Affected Systems
- EcoStruxure Control Expert
📦 What is this software?
Ecostruxure Control Expert by Schneider Electric
Ecostruxure Process Expert by Schneider Electric
⚠️ Risk & Real-World Impact
Worst Case
An attacker could steal or modify critical industrial control system project files, potentially leading to operational disruption, safety hazards, or intellectual property theft in industrial environments.
Likely Case
Unauthorized access to project files containing sensitive configuration data, credentials, or control logic that could be used for further attacks or industrial espionage.
If Mitigated
With proper access controls and patching, the impact is limited to authorized users only accessing their own project files as intended.
🎯 Exploit Status
Requires local access and memory manipulation skills. No public exploit code has been released.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version with security update as specified in SEVD-2024-044-01
Vendor Advisory: https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2024-044-01&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2024-044-01.pdf
Restart Required: Yes
Instructions:
1. Download the security update from Schneider Electric's website. 2. Backup project files. 3. Close EcoStruxure Control Expert. 4. Install the update. 5. Restart the workstation. 6. Verify the update was successful.
🔧 Temporary Workarounds
Restrict Local Access
allLimit physical and network access to engineering workstations to authorized personnel only.
Implement Least Privilege
windowsEnsure users only have access to project files necessary for their role.
🧯 If You Can't Patch
- Isolate engineering workstations on separate network segments with strict access controls.
- Implement application whitelisting to prevent unauthorized software from running on engineering workstations.
🔍 How to Verify
Check if Vulnerable:
Check if EcoStruxure Control Expert version is older than the patched version specified in SEVD-2024-044-01.Check Version:
Check version in EcoStruxure Control Expert Help > About menu or consult Schneider Electric documentation.Verify Fix Applied:
Verify the software version matches or exceeds the patched version from the security advisory.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to project files
- Unexpected memory access patterns
- Failed authentication attempts on engineering workstations
Network Indicators:
- Unusual network traffic from engineering workstations
- Attempts to access project files from unauthorized systems
SIEM Query:
source="engineering-workstation" AND (event_type="file_access" OR event_type="memory_access") AND user NOT IN authorized_users