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             AUSCERT External Security Bulletin Redistribution

                 Yokogawa CENTUM and Exaopc Vulnerability
                              3 December 2014


        AusCERT Security Bulletin Summary

Product:           Yokogawa CENTUM
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
                   Create Arbitrary Files   -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-5208 CVE-2014-0784 

Reference:         ESB-2014.1664

Original Bulletin: 

- --------------------------BEGIN INCLUDED TEXT--------------------

Advisory (ICSA-14-260-01A)

Yokogawa CENTUM and Exaopc Vulnerability (Update A)

Original release date: December 02, 2014

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This updated advisory is a follow-up to the original advisory titled
ICSA-14-260-01 Yokogawa CENTUM and Exaopc Vulnerability that was published
September 17, 2014, on the NCCIC/ICS-CERT web site.

Tod Beardsley of Rapid7 Inc. and Jim Denaro of CipherLaw have identified
an authentication vulnerability and released proof-of-concept (exploit)
code for the Yokogawa CENTUM CS 3000 series and Exaopc products. JPCERT
and Yokogawa have mitigated this vulnerability.

This vulnerability could be exploited remotely. Exploits that target this
vulnerability are known to be publicly available.


The following Yokogawa CENTUM 3000 versions are affected:

- --------- Begin Update A Part 1 of 2 --------

    CENTUM series with the Batch Management Packages installed

    CENTUM CS 3000 (R3.09.50 or earlier),
    CENTUM CS 3000 Entry Class (R3.09.50 or earlier),
    CENTUM VP (R4.03.00 or earlier, R5.04.00 or earlier), and
    CENTUM VP Entry Class (R4.03.00 or earlier, R5.04.00 or earlier).

- --------- End Update A Part 1 of 2 ----------

The following Yokogawa Exaopc version is affected:

    Exaopc (R3.72.10 or earlier).


Successful exploitation of this vulnerability could allow an attacker to
allow arbitrary files to be read and written.

Impact to individual organizations depends on many factors that are unique
to each organization. NCCIC/ICS-CERT recommends that organizations evaluate
the impact of this vulnerability based on their operational environment,
architecture, and product implementation.


Yokogawa is a company based in Japan that maintains offices in several
countries around the world, including North and Central America, South
America, Europe, the Middle East, Africa, South Asia, and East Asia.

The affected products, CENTUM CS 3000, are Windows-based control
systems. According to Yokogawa, these products are deployed across several
sectors, including Critical Manufacturing, Energy, Food and Agriculture,
and others. Yokogawa estimates that there are 7,600 systems worldwide.




CENTUM's BKBCopyD.exe service is started if the Batch Management Packages
are installed and listens by default on Port 20111/TCP. There is a
no authentication, which makes it possible to abuse several operations
provided by the service in order to:

    Leak the CENTUM project database location
    Read arbitrary files
    Write arbitrary files.

This vulnerability is different than CVE-2014-0784, which was reported
earlier in March 2014.

CVE-2014-5208[b] has been assigned to this vulnerability. Yokogawa has
scored this vulnerability with a CVSS v2 base score of 6.8; the CVSS v2
vector string is (AV:N/AC:M/Au:N/C:P/I:P/A:P).[c]



This vulnerability could be exploited remotely.


Exploits that target this vulnerability are publicly available.


An attacker with a low skill would be able to exploit this vulnerability.

- --------- Begin Update A Part 2 of 2 --------

Yokogawa has provided patch software for the vulnerable latest revision
of Exaopc and all the CENTUM systems. Please contact Yokogawa technical
support and services for the details on installation and patch availability
- --------- End Update A Part 2 of 2 ----------

Yokogawa also suggests all customers introduce appropriate security measures
to the overall system, not just for the vulnerability identified.

For more information, please see Yokogawa Security Advisory Report
YSAR-14-0003E, published on September 17, 2014. This report is available at:


Yokogawa also recommends the following firewall mitigation measures:

    Block external data communications from outside of the control system
    network on Port 20111/TCP

    Allow internal traffic on Port 20111/TCP only for the CENTUM systems
    installed with Batch Management Packages

    Block the traffic on Port 20111/TCP to Exaopc installations.

ICS-CERT encourages asset owners to take additional defensive measures to
protect against this and other cybersecurity risks.

    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

ICS-CERT also provides a section for control systems
security recommended practices on the ICS-CERT web page at:
http://ics-cert.us-cert.gov/content/recommended-practices. Several
recommended practices are available for reading and download, including
Improving Industrial Control Systems Cybersecurity with Defense-in-Depth
Strategies. ICS-CERT reminds organizations to perform proper impact analysis
and risk assessment prior to deploying defensive measures.

Additional mitigation guidance and recommended practices are
publicly available in the ICS-CERT 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. CWE-287: Improper Authentication,
    http://cwe.mitre.org/data/definitions/287.html, web site last accessed
    September 17, 2014.
    b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-5208,
    NIST uses this advisory to create the CVE web site report. This web
    site will be active sometime after publication of this advisory.
    c. CVSS Calculator,
    web site last accessed September 17, 2014.

Contact Information

For any questions related to this report, please contact ICS-CERT at:

Email: ics-cert@hq.dhs.gov
Toll Free: 1-877-776-7585
International Callers: (208) 526-0900

For industrial control systems security information and incident reporting:

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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