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AUSCERT External Security Bulletin Redistribution
ESB-2019.3696
Advisory (icsa-19-274-02) Yokogawa Products
2 October 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Yokogawa Products
Publisher: ICS-CERT
Operating System: Network Appliance
Windows
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-6008
Original Bulletin:
https://www.us-cert.gov/ics/advisories/icsa-19-274-02
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ICS Advisory (ICSA-19-274-02)
Yokogawa Products
Original release date: October 01, 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 8.4
o ATTENTION: Low skill level to exploit
o Vendor: Yokogawa
o Equipment: Exaopc, Exaplog, Exaquantum, Exasmoc, Exarqe, GA10, and
InsightSuiteAE
o Vulnerability: Unquoted Search Path or Element
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow a local attacker to
execute malicious files.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Yokogawa reports this vulnerability affects the following products:
o Exaopc (R1.01.00 - R3.77.00)
o Exaplog (R1.10.00 - R3.40.00)
o Exaquantum (R1.10.00 - R3.02.00)
o Exaquantum/Batch (R1.01.00 - R2.50.40)
o Exasmoc (All Revisions)
o Exarqe (All Revisions)
o GA10 (R1.01.01 - R3.05.01)
o InsightSuiteAE (R1.01.00 - R1.06.00)
3.2 VULNERABILITY OVERVIEW
3.2.1 UNQUOTED SEARCH PATH OR ELEMENT CWE-428
Service paths in some Yokogawa applications are unquoted and contain spaces.
This may allow a local attacker to execute malicious files by the service
privilege.
CVE-2019-6008 has been assigned to this vulnerability. A CVSS v3 base score of
8.4 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy, Food and
Agriculture
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Japan
3.4 RESEARCHER
Yokogawa reported this vulnerability to JPCERT and CISA.
4. MITIGATIONS
Yokogawa has provided the following countermeasures for this vulnerability in
each of the affected products:
o Exaopc R1.01.00 - R3.77.00: Update to the latest revision (R3.78.00)
o Exaplog:
o R1.10.00 - R3.30.00: Update to the latest revision (R3.40.00) and apply
patch software for R3.40.06
o R3.40.00: Apply patch software for R3.40.06
o Exaquantum R1.10.00 - R3.02.00: Update to the latest revision (R3.15.00)
o Exaquantum/Batch R1.01.00 - R2.50.40: Update to the latest revision
(R3.10.00
o Exasmoc: Support will end for all revisions of Exasmoc on Sep 30, 2019.
Consider migrating to Platform for Advanced Control and Estimation which is
the successor to Exasmoc
o Exarqe: Support will end for all revisions of Exarqe on Sep 30, 2019.
Consider migrating to Platform for Advanced Control and Estimation which is
the successor to Exarqe
o GA10 R1.01.01 - R3.05.01: Update to the latest revision (R3.05.06)
o InsightSuiteAE R1.01.00 - R1.06.00: Update to the latest revision
(R1.07.00)
Yokogawa states patching is the best protection against this vulnerability. If
it is not possible to patch, please consult with specialists at Yokogawa on the
next best course of action.
Yokogawa recommends all users have a security program consisting of patch
updates, anti-virus, backup and recovery, zoning, hardening, whitelisting,
firewall, etc. Yokogawa can assist in setting up the security program and can
perform security risk
assessments.
For more information about this vulnerability and the associated mitigations,
please see Yokogawa's security advisory report YSAR-19-0003 .
CISA 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.
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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