CVE-2021-22714
📋 TL;DR
This vulnerability is a memory buffer overflow in Schneider Electric PowerLogic meters that could allow attackers to cause denial of service (reboots) or execute arbitrary code remotely. It affects ION7400, PM8000, and ION9000 series power meters. Organizations using these devices for energy monitoring and management are at risk.
💻 Affected Systems
- PowerLogic ION7400
- PowerLogic PM8000
- PowerLogic ION9000
📦 What is this software?
Powerlogic Ion7400 Firmware by Schneider Electric
Powerlogic Ion9000 Firmware by Schneider Electric
Powerlogic Pm8000 Firmware by Schneider Electric
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution allowing complete compromise of the meter, potential lateral movement to other systems, and manipulation of power monitoring data.
Likely Case
Meter reboots causing temporary loss of power monitoring data and potential disruption to energy management systems.
If Mitigated
Limited impact if meters are isolated on separate networks with strict access controls.
🎯 Exploit Status
The vulnerability allows remote exploitation without authentication. While no public exploit code is known, the high CVSS score suggests exploitation is feasible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V3.0.0 and later
Vendor Advisory: https://www.se.com/ww/en/download/document/SEVD-2021-068-02
Restart Required: Yes
Instructions:
1. Download firmware version 3.0.0 or later from Schneider Electric website. 2. Backup current configuration. 3. Upload new firmware via web interface or configuration tool. 4. Reboot meter to apply update. 5. Verify firmware version after reboot.
🔧 Temporary Workarounds
Network Segmentation
allIsolate power meters on separate VLANs with strict firewall rules limiting access to authorized management systems only.
Access Control Lists
allImplement network ACLs to restrict access to meter management interfaces to specific IP addresses.
🧯 If You Can't Patch
- Segment meters on isolated networks with no internet access
- Implement strict firewall rules allowing only necessary management traffic from authorized sources
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface or configuration tool. If version is below 3.0.0, the device is vulnerable.Check Version:
Check via web interface at http://[meter-ip]/ or using Schneider Electric configuration toolsVerify Fix Applied:
After updating, verify firmware version shows 3.0.0 or higher and confirm normal operation of power monitoring functions.📡 Detection & Monitoring
Log Indicators:
- Unexpected meter reboots
- Failed login attempts to meter interface
- Unusual network connections to meter ports
Network Indicators:
- Unusual traffic patterns to meter management ports (typically 80, 443, 502)
- Traffic from unexpected source IPs to meter
SIEM Query:
source_ip=* AND dest_ip=[meter_ip] AND (port=80 OR port=443 OR port=502) AND NOT source_ip IN [authorized_ips]