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             AUSCERT External Security Bulletin Redistribution

            Advisory (ICSA-17-264-02): A vulnerability has been
                    identified in Ctek, Inc. SkyRouter
                             22 September 2017


        AusCERT Security Bulletin Summary

Product:           Ctek, Inc. SkyRouter
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-14000  

Original Bulletin: 

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Advisory (ICSA-17-264-02)

Ctek, Inc. SkyRouter

Original release date: September 21, 2017

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CVSS v3 8.6

ATTENTION: Remotely exploitable/low skill level to exploit.

Vendor: Ctek, Inc.

Equipment: SkyRouter

Vulnerability: Improper Authentication


The following versions of SkyRouter, a wireless and automation solution, are 

SkyRouter Series 4200 and 4400 all versions prior to V6.00.11


Successful exploitation of this vulnerability may allow an unauthorized user 
to view and edit settings without authenticating.


Ctek, Inc., reports they have addressed this issue and addressed additional 
security requirements in their latest security release V6.00.11, which is now
available on all models currently in production. These models are identified 
as Z4500, Z4550, and Z4400. The update can be obtained via the wireless 
devices Tool and Utilities Section, which provides an Over-The-Air Firmware 
update mechanism. Ctek, Inc., reports that due to industry demand, wireless 
carriers are rapidly eliminating 2G and 3G CDMA service and they will not be 
creating any additional update releases for those products.

Ctek, Inc., reports they are now selling a 4G version of the SkyRouter which 
they confirm the latest firmware release in this product does address the 
issues that were reported in the 3G device. They no longer sell the 2G/3G 
version of the SkyRouter on which the vulnerability was originally reported.

NCCIC/ICS-CERT recommends that users take defensive measures to minimize the 
risk of exploitation of this vulnerability.

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.

No known public exploits specifically target this vulnerability.



By accessing a specific uniform resource locator (URL) on the web server, a 
malicious user is able to access the application without authenticating.

CVE-2017-14000 has been assigned to this vulnerability. A CVSS v3 base score 
of 8.6 has been assigned; the CVSS vector string is 


Maxim Rupp reported the vulnerability to ICS-CERT.


Critical Infrastructure Sectors: Commercial Facilities, Communications, Food 
and Agriculture, Transportation Systems, and Water and Wastewater Systems

Countries/Areas Deployed: Worldwide

Company Headquarters Location: San Pedro, California

Contact Information

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

Email: ics-cert@hq.dhs.gov (link sends e-mail)

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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