CVE-2022-30238
📋 TL;DR
CVE-2022-30238 is an authentication bypass vulnerability in Schneider Electric Wiser Smart energy management systems that allows attackers to hijack admin sessions and take over administrative accounts. This affects EER21000 and EER21001 devices running firmware version 4.5 and earlier. Attackers can gain full control of affected energy management systems.
💻 Affected Systems
- Schneider Electric Wiser Smart EER21000
- Schneider Electric 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
Complete compromise of energy management system allowing attackers to manipulate power distribution, cause electrical damage, or disrupt operations.
Likely Case
Unauthorized administrative access leading to data theft, configuration changes, or service disruption.
If Mitigated
Limited impact with proper network segmentation and monitoring, though authentication bypass remains possible.
🎯 Exploit Status
Requires session hijacking capability, but once obtained, authentication bypass is straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware version after V4.5
Vendor Advisory: https://www.se.com/ww/en/download/document/SEVD-2022-130-03/
Restart Required: Yes
Instructions:
1. Download latest firmware from Schneider Electric portal. 2. Backup current configuration. 3. Upload and install new firmware via web interface. 4. Reboot device. 5. Verify firmware version.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Wiser Smart devices from internet and restrict access to trusted networks only.
Access Control Lists
allImplement strict firewall rules limiting access to device management interfaces.
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable devices
- Enable detailed logging and monitoring for suspicious authentication attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version in device web interface under System Information.Check Version:
No CLI command - check via web interface at /system/info or similar endpoint.Verify Fix Applied:
Confirm firmware version is above V4.5 in System Information page.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful admin login from unusual IP
- Session ID reuse from different IP addresses
Network Indicators:
- Unusual traffic patterns to device management ports (typically 80/443)
- Authentication requests from unexpected network segments
SIEM Query:
source="wiser-device" AND (event_type="auth_success" AND user="admin" AND src_ip NOT IN trusted_networks)