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AUSCERT External Security Bulletin Redistribution
ESB-2016.1593
Rockwell Automation Allen-Bradley Stratix 5400 and 5410
Packet Corruption Vulnerability
24 June 2016
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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:
http://ics-cert.us-cert.gov/advisories/ICSA-16-175-01
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Advisory (ICSA-16-175-01)
Rockwell Automation Allen-Bradley Stratix 5400 and 5410 Packet Corruption
Vulnerability
Original release date: June 23, 2016
Legal Notice
All information products included in http://ics-cert.us-cert.gov are provided
"as is" for informational purposes only. The Department of Homeland Security
(DHS) does not provide any warranties of any kind regarding any information
contained within. DHS does not endorse any commercial product or service,
referenced in this product or otherwise. Further dissemination of this product
is governed by the Traffic Light Protocol (TLP) marking in the header. For
more information about TLP, see http://www.us-cert.gov/tlp/.
OVERVIEW
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.
AFFECTED PRODUCTS
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
15.2(2)EB.
IMPACT
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.
BACKGROUND
Rockwell Automation, which is a US-based company, provides industrial
automation control and information products worldwide across a wide range of
industries.
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.
VULNERABILITY CHARACTERIZATION
VULNERABILITY OVERVIEW
RESOURCE MANAGEMENT ERRORS [a]
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]
VULNERABILITY DETAILS
EXPLOITABILITY
This vulnerability could be exploited remotely.
EXISTENCE OF EXPLOIT
No known public exploits specifically target this vulnerability.
DIFFICULTY
An attacker with low skill would be able to exploit this vulnerability.
MITIGATION
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):
http://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=5
(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
(http://ics-cert.us-cert.gov/).
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,
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S...,
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:
http://ics-cert.us-cert.gov
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
product.
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