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AUSCERT External Security Bulletin Redistribution
Advisory (ICSA-17-054-02) Red Lion Controls Sixnet-Managed Industrial
Switches, AutomationDirect STRIDE-Managed Ethernet Switches Vulnerability
24 February 2017
AusCERT Security Bulletin Summary
Product: Sixnet-Managed Industrial Switches
AutomationDirect STRIDE-Managed Ethernet Switches
Publisher: Red Lion Controls
Operating System: Network Appliance
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2017-9335
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Red Lion Controls Sixnet-Managed Industrial Switches, AutomationDirect
STRIDE-Managed Ethernet Switches Vulnerability
Original release date: February 23, 2017
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CVSS v3 10
ATTENTION: Remotely exploitable. Low skill level is needed to exploit.
Vendor: Red Lion Controls, AutomationDirect
Equipment: Sixnet-Managed Industrial Switches and STRIDE-Managed Ethernet
Vulnerability: Use of Hard-coded Cryptographic Keys
The following Red Lion Controls Sixnet-Managed Industrial Switches are
Sixnet-Managed Industrial Switches running firmware Version 5.0.196 and prior.
The following AutomationDirect STRIDE-Managed Ethernet Switch models, which
are manufactured by Red Lion Controls, are affected:
Stride-Managed Ethernet Switches running firmware Version 5.0.190 and prior.
Successful exploitation of the hard-coded cryptographic key vulnerabilities
could result in loss of data confidentiality, integrity, and availability.
Red Lion Controls has released SLX firmware Version 5.3.174 to address the
hard-coded cryptographic keys issue.
Red Lion Controls recommends updating to SLX firmware Version 5.3.174, found
http://www.redlion.net/ethernet-switches-software-firmware (link is external)
Automation Direct recommends updating to Stride Managed Ethernet firmware
Version 5.3.174, found here:
http://support.automationdirect.com/firmware/binaries.html (link is external)
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the
risk of exploitation of these vulnerabilities. Specifically, users should:
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 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 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.
No known public exploits specifically target these vulnerabilities.
USE OF HARD-CODED CRYPTOGRAPHIC KEY CWE-321
A hard-coded cryptographic key vulnerability was identified. Vulnerable
versions of Stride-Managed Ethernet switches and Sixnet-Managed Industrial
switches use hard-coded HTTP SSL/SSH keys for secure communication. Because
these keys cannot be regenerated by users, all products use the same key. The
attacker could disrupt communication or compromise the system.
CVE-2017-9335 has been assigned to this vulnerability. A CVSS v3 base score of
10 has been assigned; the CVSS vector string is
Mark Cross of RIoT Solutions identified these vulnerabilities.
Critical Infrastructure Sector: Critical Manufacturing
Countries/Areas Deployed: Deployed worldwide
Company Headquarters Location: United States
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