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Fuji Electric Alpha5 Smart Loader

Plan Patch7.8ICS-CERT ICSA-19-227-02Aug 15, 2019
Attack VectorLocal
Auth RequiredNone
ComplexityLow
User InteractionRequired
Summary

Alpha5 Smart Loader versions prior to 4.2 contain a stack-based buffer overflow vulnerability (CWE-121) that could allow local code execution under the privileges of the application. The vulnerability has a CVSS score of 7.8 (high severity) and is not remotely exploitable. Fuji Electric has released Version 4.2 as a fix, available through their support portal (login required).

What this means
What could happen
An attacker with local access to a system running Alpha5 Smart Loader could execute arbitrary code with application-level privileges, potentially disrupting engineering workflows or modifying control system configurations.
Who's at risk
Energy sector organizations using Fuji Electric Alpha5 Smart Loader software on engineering workstations. This affects any personnel who use the loader for configuring or managing Fuji Electric controllers in power generation, transmission, or distribution environments.
How it could be exploited
An attacker must gain local access to a computer running Alpha5 Smart Loader (e.g., via social engineering, malware delivery, or physical access). The attacker can then exploit the stack-based buffer overflow to execute code under the application's privileges without requiring user interaction beyond running the exploit.
Prerequisites
  • Local access to a workstation running Alpha5 Smart Loader version < 4.2
  • No authentication required to trigger the vulnerability
local access onlylow complexitybuffer overflow vulnerabilityaffects engineering workstations in critical infrastructure
Exploitability
Low exploit probability (EPSS 0.8%)
Affected products (1)
ProductAffected VersionsFix Status
Alpha5 Smart Loader: All< 4.24.2
Remediation & Mitigation
0/3
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HOTFIXUpgrade Alpha5 Smart Loader to Version 4.2 or later
Long-term hardening
0/2
HARDENINGImplement application whitelisting or execution controls on engineering workstations to prevent unauthorized code execution
HARDENINGEducate users on social engineering and phishing tactics to reduce risk of malware delivery via email
View full CISA ICS-CERT advisory
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