CVE-2018-7778
📋 TL;DR
This vulnerability allows remote attackers to gain administrative privileges on Schneider Electric EVlink Charging Stations without proper authentication. Attackers can bypass authentication mechanisms in the web interface to take full control of affected charging stations. All systems running versions prior to v3.2.0-12_v1 are affected.
💻 Affected Systems
- Schneider Electric EVlink Charging Station
📦 What is this software?
Evlink Charging Station Firmware by Schneider Electric
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of charging station allowing attackers to disable charging, manipulate billing, cause electrical damage, or use the station as an attack vector into connected networks.
Likely Case
Unauthorized administrative access allowing attackers to disrupt charging operations, steal electricity, or access sensitive user data.
If Mitigated
Limited impact if network segmentation and access controls prevent external access to the web interface.
🎯 Exploit Status
The authentication bypass nature suggests simple exploitation. While no public PoC exists, the vulnerability description indicates straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v3.2.0-12_v1 and later
Vendor Advisory: https://www.schneider-electric.com/en/download/document/SEVD-2018-109-01/
Restart Required: Yes
Instructions:
1. Download firmware v3.2.0-12_v1 or later from Schneider Electric portal. 2. Backup current configuration. 3. Upload new firmware via web interface. 4. Reboot charging station. 5. Verify firmware version and functionality.
🔧 Temporary Workarounds
Network Segmentation
allIsolate charging stations from untrusted networks and restrict access to management interface.
Access Control Lists
allImplement firewall rules to restrict access to charging station web interface to authorized IPs only.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate charging stations from untrusted networks
- Disable web interface if not required and use alternative management methods
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface or management console. If version is below v3.2.0-12_v1, system is vulnerable.Check Version:
Login to web interface and navigate to System Information or Settings page to view firmware version.Verify Fix Applied:
Verify firmware version shows v3.2.0-12_v1 or later. Test authentication by attempting to access admin functions without credentials.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful admin access
- Unauthorized access to admin pages
- Configuration changes from unauthenticated IPs
Network Indicators:
- HTTP requests to admin endpoints without authentication headers
- Unusual traffic patterns to charging station web interface
SIEM Query:
source="charging_station" AND (event_type="admin_access" AND auth_status="success" AND user="anonymous")