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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1652
          Advisory (ICSA-18-151-03) Yokogawa STARDOM Controllers
                                1 June 2018

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Yokogawa STARDOM Controllers
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Administrator Compromise -- Remote/Unauthenticated
                   Access Confidential Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-10592  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-18-151-03

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Advisory (ICSA-18-151-03) Yokogawa STARDOM Controllers

Original release date: May 31, 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

    CVSS v3 9.8
    ATTENTION: Exploitable remotely/low skill level to exploit
    Vendor: Yokogawa
    Equipment: STARDOM Controllers
    Vulnerability: Hard-coded Credentials

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to gain
access to the affected device, which could result in remote code execution.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Yokogawa reports the vulnerability affects the following STARDOM Controller 
products:

    FCJ (R4.02 and prior),
    FCN-100 (R4.02 and prior),
    FCN-RTU (R4.02 and prior), and
    FCN-500 (R4.02 and prior).

3.2 VULNERABILITY OVERVIEW

3.2.1 USE OF HARD-CODED CREDENTIALS CWE-798

The affected controllers utilize hard-coded credentials that could allow an 
attacker to gain unauthorized administrative access to the device, which could
result in remote code execution.

CVE-2018-10592 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: Critical Manufacturing, Energy, and Food 
   and Agriculture
 o Countries/Areas Deployed: Worldwide
 o Company Headquarters Location: Japan

3.4 RESEARCHER

VDLab of Venustech and Dongfang Electric Corporation (DEC) reported this 
vulnerability to NCCIC.

4. MITIGATIONS

Yokogawa has recommended users upgrade the FCN/FCJ software to Version R4.10 
or later and reports that the vulnerability is remediated in that version. 
Yokogawa strongly suggests all users introduce appropriate security measures 
not only for the vulnerability identified but also to the overall system.

Yokogawa recommends users with questions related to this report and 
information on obtaining the updates, please utilize the Product Inquiry 
contact details at the following location:

http://stardom.biz/

Yokogawas Security Advisory Report, YSAR-18-0004: Vulnerability of hardcoded 
password in STARDOM controllers, and other Yokogawa security reports are 
available at the following URL:

https://www.yokogawa.com/library/resources/white-papers/yokogawa-security-advisory-report-list/

NCCIC recommends users take defensive measures to minimize the risk of 
exploitation of this vulnerability. Specifically, users should:

 o Minimize and restrict remote device access where remote access is not 
   required.
 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.

No known public exploits specifically target this vulnerability.

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