ICONICS GENESIS64 and Mitsubishi Electric MC Works64 OPC UA
Plan Patch7.5ICS-CERT ICSA-21-294-03Oct 21, 2021
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary
Successful exploitation of a stack overflow vulnerability in the OPC UA interface of ICONICS GENESIS64, MobileHMI, AnalytiX, Hyper Historian and Mitsubishi Electric MC Works64 could trigger application crashes. An attacker with network access to the OPC UA port (default 4840) of an affected device can send a crafted message to cause a denial of service. GENESIS64 versions 10.97.1 and later are not vulnerable. Other affected products have no fix available and rely on network isolation and firewall protections.
What this means
What could happen
A stack overflow in the OPC UA interface of ICONICS and Mitsubishi Electric HMI/SCADA products could allow an unauthenticated attacker on the network to crash the application and interrupt visibility and control of plant operations.
Who's at risk
Organizations running ICONICS HMI/SCADA software (GENESIS64, MobileHMI, AnalytiX, Hyper Historian) or Mitsubishi Electric MC Works64 engineering and monitoring tools in energy and manufacturing sectors. Affected devices act as the user interface and gateway for operators to monitor and control pumps, motors, valves, and other critical plant equipment.
How it could be exploited
An attacker with network access to the OPC UA port (typically 4840) of an affected HMI or gateway device can send a specially crafted OPC UA message that triggers a stack overflow. This crashes the application, denying operators access to monitoring and control functions.
Prerequisites
- Network access to the OPC UA port (default 4840) of an affected ICONICS or Mitsubishi Electric device
- No authentication required
remotely exploitableno authentication requiredlow complexityaffects availability of plant operationsno patch available for most products
Exploitability
Low exploit probability (EPSS 0.2%)
Affected products (5)
1 with fix4 EOL
ProductAffected VersionsFix Status
MC Works64:≤ 4.04ENo fix (EOL)
MobileHMI:≤ 10.97No fix (EOL)
AnalytiX:≤ 10.97No fix (EOL)
Hyper Historian:≤ 10.97No fix (EOL)
GENESIS64:≤ 10.9710.97.1 or later
Remediation & Mitigation
0/6
Do now
0/1WORKAROUNDRestrict network access to OPC UA ports (default 4840) using firewall rules; only allow connections from trusted engineering workstations and systems
Schedule — requires maintenance window
0/2Patching may require device reboot — plan for process interruption
HOTFIXUpdate GENESIS64 to version 10.97.1 or later, or apply the vendor Critical Fixes Rollup package when available from ICONICS
HOTFIXApply Mitsubishi Electric Critical Fixes Rollup package when available for MC Works64
Mitigations - no patch available
0/3The following products have reached End of Life with no planned fix: MC Works64:, MobileHMI:, AnalytiX:, Hyper Historian:. Apply the following compensating controls:
HARDENINGPlace control system networks and devices behind firewalls to isolate them from the business network
HARDENINGLeverage OPC UA security features and digital certificates to ensure products only connect to trusted OPC UA servers and clients
HARDENINGUse VPN for any remote access to control system devices, and keep VPN software updated to the latest version
CVEs (1)
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