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AUSCERT External Security Bulletin Redistribution
ESB-2016.2190
Yokogawa STARDOM Authentication Bypass Vulnerability
16 September 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Yokogawa STARDOM
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2016-4860
Original Bulletin:
http://ics-cert.us-cert.gov/advisories/ICSA-16-259-01
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Advisory (ICSA-16-259-01)
Yokogawa STARDOM Authentication Bypass Vulnerability
Original release date: September 15, 2016
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/.
OVERVIEW
NCCIC/ICS-CERT received a report from Yokogawa and JPCERT/CC [a] about an
authentication bypass vulnerability in the Yokogawa STARDOM controller.
Yokogawa has produced a new release to mitigate this vulnerability.
This vulnerability could be exploited remotely.
AFFECTED PRODUCTS
Yokogawa reports that the vulnerability affects the following products:
STARDOM FCN/FCJ controller (from Version R1.01 to R4.01).
IMPACT
An attacker may be able to exploit this vulnerability to execute commands such
as stop application program, change values, and modify application.
Impact to individual organizations depends on many factors that are unique to
each organization. ICS-CERT recommends that organizations evaluate the impact
of this vulnerability based on their operational environment, architecture,
and product implementation.
BACKGROUND
Yokogawa is based in Japan and maintains offices in several countries around
the world, including the Americas, Europe, the Middle East, Africa, South
Asia, and East Asia.
STARDOM is a network-based control system. According to Yokogawa, these
products are deployed across several sectors, including Critical
Manufacturing, Energy, and Food and Agriculture. Yokogawa estimates that its
products are used worldwide.
VULNERABILITY CHARACTERIZATION
VULNERABILITY OVERVIEW
AUTHENTICATION BYPASS ISSUES [b]
Logic Designer can connect to STARDOM controller without authentication.
CVE-2016-4860 [c] has been assigned to this vulnerability. A CVSS v3 base score
of 7.3 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L). [d]
VULNERABILITY DETAILS
EXPLOITABILITY
This vulnerability could be exploited remotely.
EXISTENCE OF EXPLOIT
No known public exploits specifically target this vulnerability.
DIFFICULTY
An attacker with low skill would be able to exploit this vulnerability.
MITIGATION
Yokogawa has remediated the vulnerability with the latest release R4.02. The
following link leads to Yokogawas STARDOM web site:
http://stardom.biz (link is external)
Yokogawa strongly suggests all users to introduce appropriate security
measures not only for the vulnerabilities identified but also to the overall
systems.
Yokogawas Security Advisory Report, YSAR-16-0002: Arbitrary command execution
vulnerability in STARDOM, and other Yokogawa products are available at the
following URL:
http://www.yokogawa.com/technical-library/resources/white-papers/yokogawa-security-advisory-report-list/
(link is external)
ICS-CERT recommends that users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
- - Minimize network exposure for all control system devices and/or systems, and
ensure that they are not accessible from the Internet.
- - Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
- - 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.
ICS-CERT reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
ICS-CERT 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 in the ICSCERT Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies, that is available for download from the ICS-CERT web site.
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to ICS-CERT for
tracking and correlation against other incidents.
a. http://jvn.jp/vu/JVNVU98542287/index.html (link is external)
b. CWE-592: Authentication Bypass Issues,
https://cwe.mitre.org/data/definitions/592.html web site last accessed
September 15, 2016.
c. NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-4860, NIST
uses this advisory to create the CVE web site report. This web site will be
active sometime after publication of this advisory.
d. CVSS Calculator,
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S...,
web site last accessed September 15, 2016.
Contact Information
For any questions related to this report, please contact ICS-CERT at:
Email: ics-cert@hq.dhs.gov (link sends e-mail)
Toll Free: 1-877-776-7585
International Callers: (208) 526-0900
For industrial control systems security information and incident reporting:
http://ics-cert.us-cert.gov
ICS-CERT 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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This security bulletin is provided as a service to AusCERT's members. As
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The University of Queensland
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Internet Email: auscert@auscert.org.au
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