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             AUSCERT External Security Bulletin Redistribution

                       Nordex NC2 XSS Vulnerability
                              4 November 2014


        AusCERT Security Bulletin Summary

Product:           Nordex NC2
Publisher:         US-CERT
Operating System:  Windows
Impact/Access:     Cross-site Scripting -- Remote with User Interaction
Resolution:        Patch/Upgrade

Original Bulletin: 

Comment: ICS-CERT has stated that there are publicly available exploits that
         target this vulnerability.

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Advisory (ICSA-14-303-01)

Nordex NC2 XSS Vulnerability

Original release date: October 30, 2014

Legal Notice

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This advisory is a follow-up to the alert titled ICS-ALERT-13-304-01 Nordex 
NC2 Cross-Site Scripting Vulnerability that was published October 31, 2013, on
the NCCIC/ICS-CERT web site.

Independent researcher Darius Freamon identified a cross-site scripting 
vulnerability in the Nordex Control 2 (NC2) application and released 
proof-of-concept (exploit) code without coordination with ICS-CERT, the 
vendor, or any other coordinating entity known to ICS-CERT.

This vulnerability could be exploited remotely.

Exploits that target this vulnerability are publicly available.


The following Nordex NC2 versions are affected:

    Nordex Control 2 (NC2) SCADA V16 and prior versions.


The reflected cross-site scripting attack may allow an attacker to execute 
arbitrary script code in the users browser within the trust relationship 
between their browser and the server.

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


Nordex is a company based in Germany that maintains offices in several 
countries around the world, including the United States, Germany, Sweden, 
Netherlands, France, Austria, Spain, China, Italy, and the United Kingdom.

The affected product, Nordex Control 2, is a web-based SCADA system for wind 
power plants. According to Nordex, NC2 is deployed across the Energy sector. 
Nordex estimates that this product is used primarily in the United States, 
Europe, and China.




The NC2 Wind Farm Portal contains a flaw that allows a reflected cross-site 
scripting attack. This flaw exists because the application does not validate 
the username parameter upon submission to the login script.

CVE-2014-5408 [b] has been assigned to this vulnerability. A CVSS v2 base score 
of 7.5 has been assigned; the CVSS vector string is 
(AV:N/AC:L/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.


Nordex will release a patch for all affected NC2-SCADA versions until the end
of 2014. The patching of the NC2-SCADA system has to be done by Nordex.

Nordex will upgrade all wind farms with a valid service contract to the 
patched version of the NC2-SCADA in coordination with normal maintenance 

Owners of Nordex NC2-based wind farms without a valid service contract can 
order the patch from Nordex by contacting their local Nordex service 

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 ICSCERT 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-79: Improper Neutralization of Input During Web Page Generation 
    ('Cross-site Scripting'), http://cwe.mitre.org/data/definitions/79.html, web 
    site last accessed October 30, 2014.

    b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-5408, 
    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:L/Au:N/C:P/I:P/A:P, web
    site last accessed October 30, 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 

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