Operating System:

[Appliance]

Published:

24 February 2017

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.0510
   Advisory (ICSA-17-054-02) Red Lion Controls Sixnet-Managed Industrial
 Switches, AutomationDirect STRIDE-Managed Ethernet Switches Vulnerability
                             24 February 2017

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        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
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-9335  

Original Bulletin: 
   http://ics-cert.us-cert.gov/advisories/ICSA-17-054-02

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Advisory (ICSA-17-054-02)

Red Lion Controls Sixnet-Managed Industrial Switches, AutomationDirect 
STRIDE-Managed Ethernet Switches Vulnerability

Original release date: February 23, 2017

All information products included in http://ics-cert.us-cert.gov are provided
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(DHS) does not provide any warranties of any kind regarding any information 
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referenced in this product or otherwise. Further dissemination of this product
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more information about TLP, see http://www.us-cert.gov/tlp/.

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 
Switches

Vulnerability: Use of Hard-coded Cryptographic Keys

AFFECTED PRODUCTS

The following Red Lion Controls Sixnet-Managed Industrial Switches are 
affected:

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.

IMPACT

Successful exploitation of the hard-coded cryptographic key vulnerabilities 
could result in loss of data confidentiality, integrity, and availability.

MITIGATION

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 
here:

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.

VULNERABILITY OVERVIEW

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 
(AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).

RESEARCHER

Mark Cross of RIoT Solutions identified these vulnerabilities.

BACKGROUND

Critical Infrastructure Sector: Critical Manufacturing

Countries/Areas Deployed: Deployed worldwide

Company Headquarters Location: United States

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