CVE-2024-41161
📋 TL;DR
CVE-2024-41161 is a critical authentication bypass vulnerability in Vonets industrial wifi bridge devices. Unauthenticated remote attackers can gain administrative access using hard-coded credentials that cannot be disabled. This affects Vonets industrial wifi bridge relays and repeaters running software versions 3.3.23.6.9 and earlier.
💻 Affected Systems
- Vonets industrial wifi bridge relays
- Vonets industrial wifi bridge repeaters
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of industrial network infrastructure, allowing attackers to reconfigure devices, intercept network traffic, pivot to connected industrial control systems, and potentially disrupt industrial operations.
Likely Case
Unauthorized administrative access to wifi bridge devices, enabling network reconnaissance, traffic interception, and potential lateral movement to connected systems.
If Mitigated
Limited impact if devices are isolated in segmented networks with strict firewall rules and network monitoring.
🎯 Exploit Status
Exploitation requires only network access to the device and knowledge of the hard-coded credentials. No authentication or special tools needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 3.3.23.6.9
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-24-214-08
Restart Required: Yes
Instructions:
1. Check current firmware version using device web interface or CLI. 2. Download updated firmware from Vonets vendor portal. 3. Upload firmware through device administration interface. 4. Reboot device to apply update. 5. Verify new firmware version is installed.
🔧 Temporary Workarounds
Network segmentation and isolation
allPlace Vonets devices in isolated network segments with strict firewall rules limiting access to management interfaces.
Access control lists
allImplement network ACLs to restrict management interface access to authorized IP addresses only.
🧯 If You Can't Patch
- Immediately isolate affected devices in dedicated VLANs with strict firewall rules
- Implement network monitoring and IDS/IPS rules to detect authentication attempts and alert on suspicious access
🔍 How to Verify
Check if Vulnerable:
Check firmware version in device web interface or via SSH/Telnet. If version is 3.3.23.6.9 or earlier, device is vulnerable.Check Version:
Check via web interface at http://[device-ip]/ or via SSH/Telnet using vendor-specific commandsVerify Fix Applied:
Verify firmware version is greater than 3.3.23.6.9. Test authentication with known hard-coded credentials to confirm they no longer work.📡 Detection & Monitoring
Log Indicators:
- Successful authentication using default/hard-coded credentials
- Administrative configuration changes from unexpected sources
- Multiple failed login attempts followed by successful login
Network Indicators:
- HTTP/HTTPS requests to management interfaces from unauthorized IPs
- Telnet/SSH connections to device management ports
- Unusual network traffic patterns from bridge devices
SIEM Query:
source_ip=* AND (http_uri CONTAINS "/login" OR http_uri CONTAINS "/admin") AND http_status=200 AND user_agent NOT IN ["authorized_admin_tools"]