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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
Operating System: Network Appliance
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
CVE Names: CVE-2017-14000
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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.
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.
IMPROPER AUTHENTICATION CWE-287
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
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