CVE-2022-2302
📋 TL;DR
This vulnerability allows remote attackers to bypass authentication on Lenze cabinet series products after an initial legitimate login. An attacker can gain full administrative access without knowing valid credentials, affecting industrial control systems in manufacturing and automation environments.
💻 Affected Systems
- Lenze cabinet series products
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of industrial control systems allowing attackers to manipulate manufacturing processes, cause physical damage, disrupt operations, or exfiltrate sensitive industrial data.
Likely Case
Unauthorized access to industrial controllers enabling configuration changes, process manipulation, or denial of service affecting production lines.
If Mitigated
Limited impact if systems are isolated from networks, have strict access controls, and are monitored for unauthorized access attempts.
🎯 Exploit Status
Exploitation requires network access to the device and knowledge that a legitimate user has previously logged in. The attack is simple once these conditions are met.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Contact Lenze for specific firmware updates
Vendor Advisory: https://cert.vde.com/en/advisories/VDE-2022-030/
Restart Required: Yes
Instructions:
1. Contact Lenze support for firmware updates. 2. Schedule maintenance window. 3. Backup configurations. 4. Apply firmware update. 5. Restart device. 6. Verify authentication works correctly.
🔧 Temporary Workarounds
Network Isolation
allIsolate affected devices from untrusted networks and implement strict network segmentation
Access Control Lists
allImplement strict firewall rules to limit access to only authorized IP addresses
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices
- Monitor for unauthorized access attempts and implement multi-factor authentication where possible
🔍 How to Verify
Check if Vulnerable:
Test authentication by logging in once, then attempting to access device without credentials. If access is granted, device is vulnerable.Check Version:
Check device firmware version through web interface or console. Contact Lenze for specific version verification.Verify Fix Applied:
After patching, test that authentication is required for every login attempt and password verification works consistently.📡 Detection & Monitoring
Log Indicators:
- Multiple successful logins from same IP without authentication attempts
- Administrative actions from unexpected IP addresses
- Authentication bypass events
Network Indicators:
- Unauthorized access to industrial control protocols
- Unexpected connections to device management interfaces
SIEM Query:
source="lenze_device" AND (event_type="auth_bypass" OR (successful_login_count > 1 AND auth_attempts = 0))