CVE-2018-19783
📋 TL;DR
This vulnerability allows attackers to bypass authentication on Kentix MultiSensor-LAN devices, potentially gaining unauthorized access to sensitive sensor data and device controls. It affects Kentix MultiSensor-LAN devices running version 5.63.00 and earlier. Organizations using these devices for environmental monitoring or security systems are at risk.
💻 Affected Systems
- Kentix MultiSensor-LAN
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of sensor network allowing manipulation of environmental controls, falsification of sensor data, or disabling of monitoring systems, potentially leading to safety hazards or data integrity issues.
Likely Case
Unauthorized access to sensor readings and device configurations, enabling data theft, manipulation of monitoring thresholds, or disruption of environmental monitoring systems.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external access to vulnerable devices.
🎯 Exploit Status
Exploitation details are publicly available on Packet Storm Security and Bugtraq. The authentication bypass appears to be straightforward to execute.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 5.63.00
Vendor Advisory: https://www.kentix.com/en/support/security-advisories/
Restart Required: Yes
Instructions:
1. Contact Kentix support for latest firmware. 2. Backup device configuration. 3. Upload new firmware via web interface. 4. Reboot device. 5. Verify authentication is required for all administrative functions.
🔧 Temporary Workarounds
Network Segmentation
allIsolate MultiSensor-LAN devices on separate VLAN with strict firewall rules preventing external access.
Access Control Lists
linuxImplement IP-based restrictions allowing only authorized management stations to access device web interfaces.
iptables -A INPUT -s [TRUSTED_IP] -p tcp --dport 80 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable devices from untrusted networks
- Deploy network-based intrusion detection rules to monitor for authentication bypass attempts
🔍 How to Verify
Check if Vulnerable:
Attempt to access administrative functions without authentication. If successful, device is vulnerable.Check Version:
Check firmware version in device web interface under System > InformationVerify Fix Applied:
Verify authentication is required for all administrative pages and API endpoints after patching.📡 Detection & Monitoring
Log Indicators:
- Unauthenticated access to administrative URLs
- Multiple failed login attempts followed by successful access without credentials
Network Indicators:
- HTTP requests to /admin/* paths without authentication cookies or tokens
- Unusual access patterns from unexpected IP addresses
SIEM Query:
source="webserver" AND (url="/admin/*" OR url="/config/*") AND NOT (user!="" OR cookie!="")