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Modicon Quantum Ethernet Network module and Quantum / Premium COPRO

Plan Patch7.5SEVD-2020-070-02Mar 10, 2020
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary

A denial-of-service vulnerability exists in the Quantum Ethernet Network module (140NOE771x) and Quantum/Premium processors with integrated Ethernet. Crafted network packets can cause the Ethernet module to become unresponsive, severing network communication with remote controllers and field devices. This affects Quantum CPUs with integrated Ethernet (140CPU65xxxxx, all versions) and Premium processors with integrated Ethernet (all versions), for which no fix is available. The 140NOE77101 and 140NOE77111 Ethernet network modules are fixed in firmware version 7.1.

What this means
What could happen
Loss of availability of the Ethernet network module can interrupt communication with remote controllers and field devices, potentially halting plant operations or causing uncontrolled process states.
Who's at risk
Energy utilities and industrial facilities using Schneider Electric Quantum or Premium controllers with integrated Ethernet or the 140NOE771x Ethernet network module for remote communication and control. This includes water authorities and electric utilities that depend on these PLCs for SCADA functions.
How it could be exploited
An attacker with network access to the Ethernet module sends crafted packets that trigger a denial-of-service condition, causing the module to become unresponsive and severing network connectivity to the Quantum or Premium PLC.
Prerequisites
  • Network access to the Ethernet module's port
  • No authentication required
remotely exploitableno authentication requiredlow complexityaffects communications module essential to plant operations
Exploitability
Low exploit probability (EPSS 0.5%)
Affected products (3)
1 with fix1 pending1 EOL
ProductAffected VersionsFix Status
Quantum processors with integrated Ethernet - 140CPU65xxxxx all versionsAll versionsNo fix yet
Quantum Ethernet Network module 140NOE771x1≤ 7.07.1
Premium processors with integrated Ethernet all versionsAll versionsNo fix (EOL)
Remediation & Mitigation
0/4
Do now
0/1
WORKAROUNDImplement network access controls (firewall rules, network segmentation) to restrict Ethernet module connectivity to authorized engineering and control networks only
Schedule — requires maintenance window
0/2

Patching may require device reboot — plan for process interruption

HOTFIXUpgrade Quantum Ethernet Network module 140NOE77101 to firmware version 7.1 or later
HOTFIXUpgrade Quantum Ethernet Network module 140NOE77111 to firmware version 7.1 or later
Mitigations - no patch available
0/1
Premium processors with integrated Ethernet all versions has reached End of Life. The vendor will not release a patch. Apply the following compensating controls:
HARDENINGMonitor Ethernet module logs and uptime; establish procedures to detect and respond to unexpected module reboots or disconnections
View full Schneider Electric advisory
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