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Fuji Electric Alpha7 PC Loader

Monitor7.8ICS-CERT ICSA-22-151-01May 31, 2022
Attack VectorLocal
Auth RequiredNone
ComplexityLow
User InteractionRequired
Summary

A buffer overflow vulnerability exists in Fuji Electric Alpha7 PC Loader in how it processes project files. Successful exploitation could allow arbitrary code execution. The vulnerability is not remotely exploitable; it requires a user to open a malicious project file.

What this means
What could happen
An attacker could execute arbitrary code on an engineering workstation running Alpha7 PC Loader, potentially allowing them to modify control logic, steal project files, or compromise the workstation for further attacks on your control systems.
Who's at risk
Organizations in the energy sector using Fuji Electric Alpha7 PC Loader for programming and maintaining Fuji Electric PLCs and control devices should implement controls immediately. This affects any facility where engineering staff use this software to develop or modify control logic.
How it could be exploited
An attacker crafts a malicious Alpha7 project file and tricks an engineer into opening it via email or a fake download link. When the file is opened in PC Loader, the buffer overflow triggers, executing the attacker's code with the same privileges as the engineer.
Prerequisites
  • User must open a malicious project file in Alpha7 PC Loader
  • Engineer or technician with access to the workstation
  • Social engineering or email delivery of the malicious file
Low complexity attackUser interaction required (file must be opened)No patch availableAffects engineering workstations
Exploitability
Low exploit probability (EPSS 0.1%)
Affected products (1)
ProductAffected VersionsFix Status
Alpha7 PC Loader: All versionsAll versionsNo fix (EOL)
Remediation & Mitigation
0/4
Do now
0/2
WORKAROUNDOnly use Alpha7 project files from trusted, verified sources within your organization
HARDENINGTrain engineering staff to avoid opening unsolicited email attachments and to verify the source of project files before opening
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HOTFIXMonitor for vendor security updates and apply the patch once Fuji Electric releases it (expected within coming months)
Mitigations - no patch available
0/1
Alpha7 PC Loader: All versions has reached End of Life. The vendor will not release a patch. Apply the following compensating controls:
HARDENINGIsolate engineering workstations from production networks to limit impact if code execution occurs
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Fuji Electric Alpha7 PC Loader | CVSS 7.8 - OTPulse