CVE-2022-30234
📋 TL;DR
CVE-2022-30234 is a critical vulnerability in Schneider Electric Wiser Smart energy management systems where hard-coded credentials allow attackers to gain root access. This affects EER21000 and EER21001 gateways running firmware V4.5 and earlier. Successful exploitation enables complete system compromise and arbitrary code execution.
💻 Affected Systems
- Wiser Smart EER21000
- Wiser Smart EER21001
📦 What is this software?
Wiser Smart Eer21000 Firmware by Schneider Electric
Wiser Smart Eer21001 Firmware by Schneider Electric
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain full root control over the device, enabling them to execute arbitrary code, manipulate energy data, disrupt operations, pivot to other network systems, or deploy persistent malware.
Likely Case
Attackers exploit the hard-coded credentials to gain administrative access, potentially disrupting energy management operations, stealing sensitive data, or using the device as an entry point into the broader network.
If Mitigated
With proper network segmentation and access controls, the impact is limited to the affected device only, preventing lateral movement and protecting critical infrastructure.
🎯 Exploit Status
Exploitation requires network access to the device but is straightforward once access is obtained due to the static credentials.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V4.6 or later
Vendor Advisory: https://www.se.com/ww/en/download/document/SEVD-2022-130-03/
Restart Required: Yes
Instructions:
1. Download firmware V4.6 or later from Schneider Electric's website. 2. Follow the vendor's firmware update procedure for EER21000/EER21001 devices. 3. Verify the update completed successfully. 4. Restart the device.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices in a separate network segment with strict firewall rules to limit access.
Access Control Lists
allImplement strict network ACLs to allow only authorized IP addresses to communicate with the devices.
🧯 If You Can't Patch
- Immediately isolate affected devices from the internet and critical internal networks
- Implement strict network monitoring and anomaly detection for any unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check the device firmware version via the web interface or CLI. If version is V4.5 or earlier, the device is vulnerable.Check Version:
Check via web interface at http://<device-ip>/status or consult device documentation for CLI commandsVerify Fix Applied:
After updating, verify the firmware version shows V4.6 or later in the device management interface.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful root login
- Unusual SSH or administrative access from unexpected IP addresses
- Configuration changes not initiated by authorized personnel
Network Indicators:
- Unexpected outbound connections from the device
- Unusual protocol traffic to/from the device management ports
- Traffic patterns indicating lateral movement from the device
SIEM Query:
source="device_logs" AND (event_type="authentication" AND result="success" AND user="root") OR (event_type="configuration_change" AND user NOT IN ["authorized_users"])