CVE-2022-30236
📋 TL;DR
This vulnerability allows attackers to perform cross-domain attacks that could lead to unauthorized access to Wiser Smart energy management systems. It affects Schneider Electric's EER21000 and EER21001 products running firmware versions 4.5 and earlier. The vulnerability stems from improper resource transfer between security domains.
💻 Affected Systems
- Wiser Smart
- EER21000
- 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 the energy management system allowing attackers to manipulate energy controls, access sensitive operational data, or disrupt energy distribution.
Likely Case
Unauthorized access to system interfaces and potential data exfiltration from the affected devices.
If Mitigated
Limited impact with proper network segmentation and access controls preventing cross-domain attacks.
🎯 Exploit Status
Cross-domain attacks typically require some level of access to initiate but can lead to privilege escalation.
🛠️ 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 portal. 2. Backup current configuration. 3. Upload new firmware via web interface. 4. Reboot device. 5. Verify firmware version.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices in separate network segments to prevent cross-domain attacks.
Access Control Lists
allImplement strict firewall rules to limit communication to/from affected devices.
🧯 If You Can't Patch
- Isolate affected devices from internet and untrusted networks
- Implement strict network segmentation and monitor for unusual cross-domain traffic
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface or CLI. If version is 4.5 or earlier, device is vulnerable.Check Version:
Check via web interface: System > About, or via CLI if availableVerify Fix Applied:
Verify firmware version is 4.6 or later after patching.📡 Detection & Monitoring
Log Indicators:
- Unusual cross-domain requests
- Authentication attempts from unexpected sources
- Configuration changes
Network Indicators:
- Unexpected cross-domain HTTP requests
- Traffic between normally isolated network segments
SIEM Query:
source_ip IN (affected_device_ips) AND (http_referer CONTAINS 'cross-domain' OR uri CONTAINS 'cross-domain')