-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.0909
                    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: 
   http://ics-cert.us-cert.gov/advisories/ICSA-14-154-01

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

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/.

OVERVIEW

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.

AFFECTED PRODUCTS

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.

IMPACT

Exploiting this vulnerability could result in a denial-of-service (DoS)
condition, which would close communication connections and cause system
instability.

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.

BACKGROUND

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.

VULNERABILITY CHARACTERIZATION

VULNERABILITY OVERVIEW

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

IMPROPER INPUT VALIDATION-IP-BASED[a]

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
(AV:N/AC:M/Au:N/C:N/I:N/A:C).[c]

IMPROPER INPUT VALIDATION-SERIAL-BASED[d]

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
(AV:L/AC:H/Au:N/C:N/I:N/A:C).[f]

VULNERABILITY DETAILS

EXPLOITABILITY

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.

EXISTENCE OF EXPLOIT

No known public exploits specifically target this vulnerability.

DIFFICULTY

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.

MITIGATION

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:

http://www.copadata.com/en/support.html

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
(http://ics-cert.us-cert.gov/).

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,
    http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:M/Au:N/C:N/I:N/A:C,
    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,
    http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:L/AC:H/Au:N/C:N/I:N/A:C,
    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:
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.

- --------------------------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:

        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
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.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=nFss
-----END PGP SIGNATURE-----