OleumTech WIO Family Vulnerabilities
Low RiskICS-CERT ICSA-14-202-01AApr 23, 2014
Summary
OleumTech WIO DH2 Wireless Gateway and OleumTech Sensor Wireless I/O Modules contain multiple vulnerabilities including improper input validation (CWE-20), missing authentication checks (CWE-306), and weak random number generation (CWE-338). These devices are used for wireless data acquisition and control in water and environmental monitoring systems.
What this means
What could happen
An attacker with network access to these wireless devices could send malicious commands that are not properly validated, potentially bypassing authentication or predicting security tokens, allowing unauthorized modification of sensor readings, process parameters, or wireless network operation.
Who's at risk
Water utilities, environmental monitoring systems, and facilities using OleumTech wireless data acquisition equipment. Specifically affects WIO DH2 Wireless Gateways and associated Sensor Wireless I/O Modules that collect and transmit sensor data wirelessly.
How it could be exploited
An attacker on the same network or with wireless range of the WIO gateway or I/O modules could craft malformed input packets that exploit the input validation weakness (CWE-20), bypass the missing authentication controls (CWE-306), or predict session tokens using the weak random number generator (CWE-338) to inject unauthorized commands or extract configuration data.
Prerequisites
- Network or wireless access to WIO DH2 gateway or Sensor I/O modules
- No valid credentials required due to authentication bypass vulnerability
remotely exploitableno authentication requiredno patch availableweak input validationweak random number generation
Exploitability
Moderate exploit probability (EPSS 2.2%)
Affected products (2)
2 EOL
ProductAffected VersionsFix Status
OleumTech Sensor Wireless I/O Modules: vers:all/*All versionsNo fix (EOL)
OleumTech WIO DH2 Wireless Gateway: vers:all/*All versionsNo fix (EOL)
Remediation & Mitigation
0/4
Schedule — requires maintenance window
0/1Patching may require device reboot — plan for process interruption
HARDENINGMonitor wireless traffic for unexpected commands or anomalous sensor readings that could indicate exploitation attempts against WIO devices
Mitigations - no patch available
0/3The following products have reached End of Life with no planned fix: OleumTech Sensor Wireless I/O Modules: vers:all/*, OleumTech WIO DH2 Wireless Gateway: vers:all/*. Apply the following compensating controls:
HARDENINGImplement network segmentation to isolate WIO wireless systems from corporate networks and the internet; restrict access to WIO devices and gateways to authorized management systems only
HARDENINGDeploy wireless encryption and authentication at the network layer (e.g., strong WiFi security, VPN) to protect WIO device communications since the devices themselves lack adequate authentication controls
HARDENINGEvaluate migration to alternative wireless I/O modules from vendors that provide active security updates and fixes for input validation and authentication vulnerabilities
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