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AUSCERT External Security Bulletin Redistribution
ESB-2019.3148
US-CERT Advisory (icsa-19-227-02) Fuji Electric Alpha5 Smart Loader
16 August 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Fuji Electric Alpha5 Smart Loader
Publisher: US-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2019-13520
Original Bulletin:
https://www.us-cert.gov/ics/advisories/icsa-19-227-02
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ICS Advisory (ICSA-19-227-02)
Fuji Electric Alpha5 Smart Loader
Original release date: August 15, 2019
Legal Notice
All information products included in http://ics-cert.us-cert.gov are
provided"as is" for informational purposes only. The Department of Homeland
Security (DHS) does not provide any warranties of any kind regarding any
information contained within. DHS does not endorse any commercial product or
service, referenced in this product or otherwise. Further dissemination of this
product is governed by the Traffic Light Protocol (TLP) marking in the header.
For more information about TLP, see http://www.us-cert.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 7.8
o ATTENTION: Low skill level to exploit
o Vendor: Fuji Electric
o Equipment: Alpha5 Smart Loader
o Vulnerability: Stack-based Buffer Overflow
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to
execute code under the privileges of the application.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Alpha5 Smart Loader, a servo drive, are affected:
o Alpha5 Smart Loader: All versions prior to 4.2
3.2 VULNERABILITY OVERVIEW
3.2.1 STACK-BASED BUFFER OVERFLOW CWE-121
Multiple buffer overflow issues have been identified. An attacker could use
specially crafted project files to overflow the buffer and execute code under
the privileges of the application.
CVE-2019-13520 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/C:H/
I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Critical
Manufacturing
o COUNTRIES/AREAS DEPLOYED: Europe and Asia
o COMPANY HEADQUARTERS LOCATION: Japan
3.4 RESEARCHER
Natnael Samson (@NattiSamson), working with Trend Micro's Zero Day Initiative,
reported this vulnerability to CISA.
4. MITIGATIONS
Fuji Electric has released Version 4.2 of the Alpha Loader software (login
required).
CISA also recommends users take the following measures to protect themselves
from social engineering attacks:
o Do not click web links or open unsolicited attachments in email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices
on the ICS webpage on us-cert.gov . Several recommended practices are available
for reading and download, including Improving Industrial Control Systems
Cybersecurity with Defense-in-Depth Strategies .
Additional mitigation guidance and recommended practices are publicly available
on the ICS webpage on us-cert.gov in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to CISA for tracking
and correlation against other incidents.
No known public exploits specifically target this vulnerability. This
vulnerability is not exploitable remotely.
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