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AUSCERT External Security Bulletin Redistribution
ESB-2018.2934
Advisory (ICSA-18-270-03) Fuji Electric FRENIC Devices
1 October 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: Fuji Electric FRENIC Devices
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-14802 CVE-2018-14798 CVE-2018-14790
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-18-270-03
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Advisory (ICSA-18-270-03)
Fuji Electric FRENIC Devices
Original release date: September 27, 2018
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 9.8
o ATTENTION: Exploitable remotely/low skill level to exploit/public exploits
are available
o Vendor: Fuji Electric
o Equipment: FRENIC Loader, FRENIC-Mini (C1), FRENIC-Mini (C2), FRENIC-Eco,
FRENIC-Multi, FRENIC-MEGA, FRENIC-Ace
o Vulnerabilities: Buffer Over-read, Out-of-Bounds Read, Stack-based Buffer
Overflow
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow for arbitrary
remote code execution affecting the availability of the device.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of FRENIC Loader, FRENIC-Mini (C1), FRENIC-Mini (C2),
FRENIC-Eco, FRENIC-Multi, FRENIC-MEGA, FRENIC-Ace, HVAC drive devices, are
affected:
o FRENIC LOADER v3.3 v7.3.4.1a of FRENIC-Mini (C1), FRENIC-Mini (C2),
FRENIC-Eco, FRENIC-Multi, FRENIC-MEGA, FRENIC-Ace
3.2 VULNERABILITY OVERVIEW
3.2.1 BUFFER OVER-READ CWE-126
A buffer over-read vulnerability may allow remote code execution on the
device.
CVE-2018-14790 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H
/I:H/A:H).
3.2.2 OUT-OF-BOUNDS READ CWE-125
The program does not properly parse FNC files that may allow for information
disclosure.
CVE-2018-14798 has been assigned to this vulnerability. A CVSS v3 base score of
5.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L
/I:N/A:N).
3.2.3 STACK-BASED BUFFER OVERFLOW CWE-121
The program does not properly check user-supplied comments which may allow for
arbitrary remote code execution.
CVE-2018-14802 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H
/I:H/A:H).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Japan
3.4 RESEARCHER
Michael Flanders and Ghirmay Desta working with Trend Micro's Zero Day
Initiative, reported these vulnerabilities to NCCIC.
4. MITIGATIONS
Fuji Electric has stated they are actively working on a resolution to the
reported vulnerabilities. This advisory will be updated once mitigation efforts
have been reported to NCCIC.
NCCIC recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet.
o Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
o When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing that VPNs may have vulnerabilities and should
be updated to the most current version available. Also recognize that VPN
is only as secure as the connected devices.
NCCIC reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended
practices on the ICS-CERT web page. 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-CERT website 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 NCCIC for tracking
and correlation against other incidents.
Contact Information
For any questions related to this report, please contact the NCCIC at:
Email: NCCICCUSTOMERSERVICE@hq.dhs.gov
Toll Free: 1-888-282-0870
For industrial control systems cybersecurity information: http://
ics-cert.us-cert.gov
or incident reporting: https://ics-cert.us-cert.gov/Report-Incident?
The NCCIC continuously strives to improve its products and services. You can
help by choosing one of the links below to provide feedback about this product.
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