CVE-2022-22810
📋 TL;DR
This vulnerability allows attackers to perform unlimited authentication attempts against admin interfaces of Schneider Electric smart home controllers, potentially leading to credential brute-forcing and unauthorized administrative access. It affects spaceLYnk, Wiser for KNX (formerly homeLYnk), and fellerLYnk systems running version 2.6.2 or earlier.
💻 Affected Systems
- spaceLYnk
- Wiser for KNX (formerly homeLYnk)
- fellerLYnk
📦 What is this software?
Fellerlynk Firmware by Schneider Electric
Spacelynk Firmware by Schneider Electric
Wiser For Knx Firmware by Schneider Electric
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to manipulate building automation systems, disable security controls, or access sensitive network segments.
Likely Case
Unauthorized administrative access leading to manipulation of smart home/building automation settings, potential data theft, or disruption of automated systems.
If Mitigated
Limited impact with proper network segmentation and monitoring, though authentication attempts may still consume resources.
🎯 Exploit Status
Simple brute-force attack requiring only network access to the admin interface. No special tools needed beyond standard HTTP clients.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after V2.6.2
Vendor Advisory: https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-039-04
Restart Required: Yes
Instructions:
1. Download updated firmware from Schneider Electric portal. 2. Backup current configuration. 3. Apply firmware update via web interface. 4. Verify update completed successfully. 5. Restart device.
🔧 Temporary Workarounds
Network Access Control
allRestrict access to admin interfaces using firewall rules or network segmentation
Rate Limiting Proxy
linuxPlace a reverse proxy with rate limiting in front of vulnerable devices
# Example nginx rate limiting
limit_req_zone $binary_remote_addr zone=auth:10m rate=5r/m;
limit_req zone=auth burst=10 nodelay;
🧯 If You Can't Patch
- Isolate affected devices in separate VLAN with strict firewall rules
- Implement network-based intrusion detection to monitor for brute-force patterns
🔍 How to Verify
Check if Vulnerable:
Check web interface version in admin panel or attempt multiple failed logins to see if account lockout occursCheck Version:
Check web interface admin panel or use vendor-specific CLI commands if availableVerify Fix Applied:
Verify firmware version is above V2.6.2 and test that multiple failed logins trigger account lockout📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts from single IP
- Successful login after many failures
- Unusual admin activity patterns
Network Indicators:
- High volume of HTTP POST requests to login endpoints
- Traffic patterns showing systematic credential guessing
SIEM Query:
source="web_logs" action="login_failed" | stats count by src_ip | where count > 10