Hash: SHA256

             AUSCERT External Security Bulletin Redistribution

                       Moxa DACenter Vulnerabilities
                             15 December 2016


        AusCERT Security Bulletin Summary

Product:           Moxa DACenter
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account            
                   Denial of Service               -- Remote with User Interaction
Resolution:        Alternate Program
CVE Names:         CVE-2016-9356 CVE-2016-9354 

Original Bulletin: 

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

Advisory (ICSA-16-348-02)

Moxa DACenter Vulnerabilities

Original release date: December 13, 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/.


Independent researcher Zhou Yu has identified denial-of-service and
unquoted service path privilege escalation vulnerabilities in Moxa's
DACenter application. Moxa has produced a patch to mitigate these
vulnerabilities. Zhou Yu has tested the patch to validate that it resolves
the vulnerabilities.

These vulnerabilities could be exploited remotely.


Moxa reports that the vulnerability affects the following versions of

    Versions 1.4 and older.


The vulnerabilities may render the DACenter application unavailable and
also allow an authorized but nonprivileged local user to execute arbitrary
code with privileges on the system.

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


Moxa is a Taiwan-based company that maintains offices in several countries
around the world, including the US, UK, India, Germany, France, China,
Russia, and Brazil.

The affected product, DACenter, provides a standard OPC interface
that interacts with Moxa Active OPC Server for real-time data
collection. According to Moxa, DACenter is deployed across several sectors
including Commercial Facilities, Critical Manufacturing, Energy, Water and
Wastewater Systems, and others. Moxa estimates that this product is used
primarily in the United States and Europe with a small percentage in Asia.




A specially crafted project file may cause the program to crash.

CVE-2016-9354[b] has been assigned to this vulnerability. A CVSS
v3 base score of 5.5 has been assigned; the CVSS vector string is


The application may suffer from an unquoted search path issue.

CVE-2016-9356[e] has been assigned to this vulnerability. A CVSS
v3 base score of 8.8 has been assigned; the CVSS vector string is



These vulnerabilities could be exploited remotely.


No known public exploits specifically target these vulnerabilities.


An attacker with a low skill would be able to exploit these vulnerabilities.


Moxa recommends replacing existing DACenter installations with the new
software MX-AOPC UA suite. DACenter is nearing end-of-life by the end of
2016, and no further updates will be issued.

For existing DACenter installations, Moxa recommends contacting the Moxa
Technical Support team or visiting the Moxa technical support web page at:


ICS-CERT recommends that users take defensive measures to minimize the
risk of exploitation of these vulnerabilities. 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 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.

    CWE-400: Uncontrolled Resource Consumption ('Resource Exhaustion'),
    https://cwe.mitre.org/data/definitions/400.html, web site last accessed
    December 13, 2016.
    NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-9354,
    NIST uses this advisory to create the CVE web site report. This web
    site will be active sometime after publication of this advisory.
    CVSS Calculator,
    web site last accessed December 13, 2016.
    CWE-428: Unquoted Search Path or Element,
    https://cwe.mitre.org/data/definitions/428.html, web site last accessed
    December 13, 2016.
    NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-9356,
    NIST uses this advisory to create the CVE web site report. This web
    site will be active sometime after publication of this advisory.
    CVSS Calculator,
    web site last accessed December 13, 2016.

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.

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:


Australian Computer Emergency Response Team
The University of Queensland
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
Comment: http://www.auscert.org.au/render.html?it=1967