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             AUSCERT External Security Bulletin Redistribution

          Rockwell Automation Allen-Bradley Stratix 5400 and 5410
                      Packet Corruption Vulnerability
                               24 June 2016


        AusCERT Security Bulletin Summary

Product:           Rockwell Automation Allen-Bradley Stratix 5400 and 5410 industrial switches
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-1399  

Reference:         ESB-2016.1213

Original Bulletin: 

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Advisory (ICSA-16-175-01)

Rockwell Automation Allen-Bradley Stratix 5400 and 5410 Packet Corruption 

Original release date: June 23, 2016

Legal Notice

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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/.


Rockwell Automation has identified a resource management vulnerability in 
Rockwell Automations Allen-Bradley Stratix 5400 and Allen-Bradley Stratix 5410
industrial networking switches. Rockwell Automation has produced a new 
firmware version to mitigate this vulnerability.

This vulnerability could be exploited remotely.


The following Rockwell Automation Allen-Bradley Stratix industrial switches 
are affected:

Allen-Bradley Stratix 5400 Industrial Ethernet Switch, firmware Versions 
15.2(2)EA1, 15.2(2)EA2, and

Allen-Bradley Stratix 5410 Industrial Distribution Switch, firmware Versions 


Successful exploitation of this vulnerability may allow a remote attacker to 
impact traffic (or packets) transiting the affected device.

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


Rockwell Automation, which is a US-based company, provides industrial 
automation control and information products worldwide across a wide range of 

The affected products, Allen-Bradley Stratix 5400 and 5410, are industrial 
switches. According to Rockwell Automation, the Allen-Bradley Stratix 5400 and
5410 switches are deployed across several sectors including Critical 
Manufacturing, Energy, Water and Wastewater Systems, and others. Rockwell 
Automation estimates that these products are used worldwide.




The vulnerability is due to improper processing of some Internet Control 
Message Protocol (ICMP) IPv4 packets. An attacker could exploit this 
vulnerability by sending ICMP IPv4 packets to an affected device allowing an 
attacker to corrupt the packet waiting for transmission.

CVE-2016-1399 [b] has been assigned to this vulnerability. A CVSS v3 base score 
of 5.8 has been assigned; the CVSS vector string is 
(AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N). [c]



This vulnerability could be exploited remotely.


No known public exploits specifically target this vulnerability.


An attacker with low skill would be able to exploit this vulnerability.


The identified vulnerability was originally reported by Cisco to impact the 
Cisco Industrial Ethernet 4000 Series and 5000 Series switches. Rockwell 
Automation determined that the vulnerability also impacts Rockwell Automations
Allen-Bradley Stratix 5400 Industrial Ethernet Switches and the Allen-Bradley
Stratix 5410 Industrial Distribution Switches, which contain affected versions
of the Cisco IOS firmware. In response to the reported vulnerability, Rockwell
Automation has released a new version of the Allen-Bradley Stratix 5400 and 
Allen-Bradley Stratix 5410 firmware, Version 15.2(4)EA3, which addresses the 
vulnerability. Rockwell Automations encourages asset owners to upgrade to the
newest available versions.

Rockwell Automations new firmware version, Version 15.2(4)EA3, for the 
Allen-Bradley Stratix 5400 Industrial Ethernet Switches (Series A) and the 
Allen-Bradley Stratix 5410 Industrial Distribution Switches (Series A) can be
downloaded from the following location (with a valid account): 
(link is external)

To determine if Allen-Bradley Stratix 5400 or Allen-Bradley Stratix 5410 
switches are using vulnerable firmware, please refer to Rockwell Automations 
Knowledgebase article, KB866255: Upgrading or Verifying Stratix Firmware, 
which is available at the following location (with a valid account):

https://rockwellautomation.custhelp.com/app/answers/detail/a_id/866255 (link 
is external)

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

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-399: Resource Management Errors, 
http://cwe.mitre.org/data/definitions/399.html, web site last accessed June 
23, 2016.

b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-1399, 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, 
web site last accessed June 23, 2016.

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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