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Triangle Research Nano 10 PLC Denial of Service

Act NowICS-CERT ICSA-13-189-02Apr 10, 2013
Summary

The Triangle Research Nano-10 PLC does not properly validate input data (CWE-20), allowing an attacker to send malformed packets that trigger a denial-of-service condition. The device becomes unresponsive to legitimate requests and requires manual restart to restore operation. This affects all versions of the Nano-10 PLC firmware.

What this means
What could happen
An attacker can send specially crafted packets to the Nano-10 PLC, causing it to stop responding to legitimate requests and interrupt manufacturing operations until the device is manually rebooted.
Who's at risk
Manufacturing facilities using Triangle Research Nano-10 PLCs in production control systems, especially those managing critical process flows or connected to networked systems.
How it could be exploited
An attacker with network access to the PLC's communication port sends malformed input data that the device does not properly validate, causing a denial-of-service condition that crashes the device's service handler.
Prerequisites
  • Network reachability to the Nano-10 PLC communication port
  • No authentication required
Remotely exploitableNo authentication requiredNo patch availableAffects control system availability
Exploitability
High exploit probability (EPSS 22.7%)
Affected products (1)
ProductAffected VersionsFix Status
Nano-10 PLC: vers:all/*All versionsNo fix (EOL)
Remediation & Mitigation
0/4
Do now
0/1
HARDENINGImplement firewall rules to restrict network access to the Nano-10 PLC from only authorized engineering workstations and control network subnets
Schedule — requires maintenance window
0/2

Patching may require device reboot — plan for process interruption

WORKAROUNDMonitor PLC availability and establish manual restart procedures to minimize downtime if a denial-of-service attack occurs
HOTFIXContact Triangle Research to verify whether a firmware update or mitigation is available beyond the current advisory
Mitigations - no patch available
0/1
Nano-10 PLC: vers:all/* has reached End of Life. The vendor will not release a patch. Apply the following compensating controls:
HARDENINGSegment the PLC onto a dedicated industrial control network not connected to general corporate IT networks or the internet
View full CISA ICS-CERT advisory
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Triangle Research Nano 10 PLC Denial of Service - OTPulse