CVE-2019-12254
📋 TL;DR
This vulnerability allows unauthenticated attackers to change application settings in Tecson Tankspion and GOKs SmartBox 4 products by accessing a specific URL. The lack of proper access control enables attackers to modify configuration without authentication, affecting all users of these industrial control systems.
💻 Affected Systems
- Tecson Tankspion
- GOKs SmartBox 4
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could reconfigure critical industrial control systems, potentially causing physical damage, environmental contamination, or safety incidents by altering tank monitoring and control parameters.
Likely Case
Attackers modify application settings to disrupt operations, disable security features, or gain persistent access to industrial control networks.
If Mitigated
With proper network segmentation and access controls, impact is limited to unauthorized configuration changes within the affected application scope.
🎯 Exploit Status
Exploitation requires only web access to the vulnerable endpoint with no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Contact vendor for specific patched versions
Vendor Advisory: https://cert.vde.com/en/advisories/VDE-2019-012/
Restart Required: Yes
Instructions:
1. Contact Tecson or GOKs for patched firmware. 2. Backup current configuration. 3. Apply firmware update following vendor instructions. 4. Restart device. 5. Verify proper functionality.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices from untrusted networks
Configure firewall rules to restrict access to device IP/ports
Access Control Lists
linuxImplement network-level access restrictions
iptables -A INPUT -s [trusted_networks] -p tcp --dport [device_port] -j ACCEPT
iptables -A INPUT -p tcp --dport [device_port] -j DROP
🧯 If You Can't Patch
- Segment affected devices in isolated VLAN with strict firewall rules
- Implement application-layer proxy with authentication before device access
🔍 How to Verify
Check if Vulnerable:
Attempt to access settings endpoint without authentication via web browser or curl: curl -X POST http://[device_ip]/settings_endpointCheck Version:
Check web interface or contact vendor for firmware versionVerify Fix Applied:
Verify authentication is required for settings endpoint access and test with invalid credentials📡 Detection & Monitoring
Log Indicators:
- Unauthenticated POST requests to settings endpoints
- Configuration changes from unauthorized IP addresses
Network Indicators:
- Unusual POST requests to device web interface from external sources
- Traffic to known vulnerable endpoints
SIEM Query:
source_ip NOT IN trusted_networks AND dest_port=80 AND http_method=POST AND uri CONTAINS 'settings'