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10 June 2014

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             AUSCERT External Security Bulletin Redistribution

                    COPA-DATA Improper Input Validation
                               10 June 2014


        AusCERT Security Bulletin Summary

Product:           zenon DNP3 NG driver (DNP3 master)
                   zenon DNP3 Process Gateway (DNP3 outstation)
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-2346 CVE-2014-2345 

Original Bulletin: 

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Advisory (ICSA-14-154-01)

COPA-DATA Improper Input Validation

Original release date: June 03, 2014

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/.


Automation software company Ing. Punzenberger COPA-DATA GmbH reported
an improper input validation vulnerability affecting the DNP3 driver
in the zenon SCADA software. The vulnerability was found based on the
DNP3 research conducted by Adam Crain of Automatak and Chris Sistrunk of
Mandiant. COPA-DATA has produced an update that mitigates the vulnerability,
as well as provides customer support information to assist asset owners
and integrators.

This vulnerability could be exploited remotely.


The following COPA-DATA products are affected:

    zenon DNP3 NG driver (DNP3 master), Versions 7.10 SP0 up to and
    including 7.11 SP0 build 10238
    zenon DNP3 Process Gateway (DNP3 outstation), Versions 7.11 SP0 build
    10238 and prior.


Exploiting this vulnerability could result in a denial-of-service (DoS)
condition, which would close communication connections and cause 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 this vulnerability based on their operational environment,
architecture, and product implementation.


COPA-DATA is an Austrian-based company that maintains offices in several
countries around the world, including the United States, Europe, and Asia.

The affected products, zenon HMI/SCADA, are Windows based SCADA
systems. According to COPA-DATA, the zenon DNP3_NG driver and the zenon
DNP3 process gateway are used primarily in the energy and infrastructure
industries, including water and waste-water treatment. These products are
used mainly in the United States and Australia but also in other countries
in North America, South America, Africa, Asia, Europe and the Middle-East.



As this vulnerability affects Internet Protocol (IP)-connected and
Serial-connected devices, two CVSS scores have been calculated.


The zenon DNP3 driver software incorrectly validates input. An attacker
could cause the software to go into an infinite loop with a specifically
crafted TCP packet, causing the process to crash. The system must be
restarted manually to clear the condition.

The following scoring is for IP-connected devices.

CVE- 2014-2345[b] has been assigned to this vulnerability. A CVSS
v2 base score of 7.1 has been assigned; the CVSS vector string is


The zenon DNP3 driver software incorrectly validates input. An attacker
could cause the software to go into an infinite loop, causing the process
to crash. The system must be restarted manually to clear the condition.

The following scoring is for serial-connected devices.

CVE- 2014-2346[e] has been assigned to this vulnerability. A CVSS
v2 base score of 4.0 has been assigned; the CVSS vector string is



The IP-based vulnerability could be exploited remotely.

The serial-based vulnerability is not exploitable remotely. Local access
to the serial-based outstation is required.


No known public exploits specifically target this vulnerability.


An attacker with a moderate skill could craft an IP packet that would be
able to exploit the vulnerability for an IP-based device.

An attacker with a high skill could exploit the serial-based vulnerability
because physical access to the device or some amount of social engineering
is required.


Build 11206 for Version zenon 7.11 is available that contains
updated versions of the affected products that resolve the discovered
vulnerabilities. COPA-DATA recommends upgrading or updating the affected
products to this version.

Please see Knowledge Base articles 179444 and 178001 located here:


System integrators and asset owners should contact their local COPA-DATA
representative for further information on how to obtain this update.

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 devices.

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.

In addition, ICS-CERT recommends that users take the following measures
to protect themselves from social engineering attacks:

    Do not click web links or open unsolicited attachments in email messages.
    Refer to Recognizing and Avoiding Email Scams[g] for more information
    on avoiding email scams.
    Refer to Avoiding Social Engineering and Phishing Attacks[h] for more
    information on social engineering attacks.

    a. CWE-20: Improper Input Validation,
    http://cwe.mitre.org/data/definitions/20.html, web site last accessed
    June 03, 2014.
    b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-2345,
    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 June 03, 2014.
    d. CWE-20: Improper Input Validation,
    http://cwe.mitre.org/data/definitions/20.html, web site last accessed
    June 03, 2014.
    e. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-2346,
    NIST uses this advisory to create the CVE web site report. This web
    site will be active sometime after publication of this advisory.
    f. CVSS Calculator,
    web site last accessed June 03, 2014.
    g. Recognizing and Avoiding Email Scams,
    http://www.us-cert.gov/reading_room/emailscams_0905.pdf, web site last
    accessed June 03, 2014.
    h. National Cyber Alert System Cyber Security Tip ST04-014,
    http://www.us-cert.gov/cas/tips/ST04-014.html, web site last accessed
    June 03, 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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