Rockwell recommends the following:
* Rockwell Automation strongly encourages users to apply the latest available version of firmware to keep up to date with the latest features, anomaly fixes, and security improvements. Update to a version of firmware as listed below that mitigates the associated risk:
* Apply FRN 31.011 or later from: https://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?Keyword=5370&crumb=112 https://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx
* For EtherNet/IP-based vulnerabilities (ID 1-14), block all traffic to and from outside the Manufacturing Zone by blocking or restricting access to Port 2222/TCP/UDP and Port 44818/TCP/UDP using proper network infrastructure controls, such as firewalls, UTM devices, or other security appliances. For more information on TCP/UDP ports used by Rockwell Automation Products, see Knowledgebase Article ID 898270 https://rockwellautomation.custhelp.com/app/answers/detail/a_id/898270/page/1 (login required). * Stratix users can use Device Manager or Studio 5000 Logix Designer to configure access control lists (ACL) to block/restrict ports. See section “Access Control Lists” in Stratix Managed Switches User Manual, publication 1783-UM007 http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1783-um007_-en-p.pdf , for detailed instructions.
* For web-based vulnerabilities (ID 15-17), block all traffic from outside the Manufacturing Zone by blocking or restricting access to Port 80/443/TCP. * Stratix users can use Device Manager or Studio 5000 Logix Designer to configure ACL’s to block/restrict ports. See section “Access Control Lists” in Stratix Managed Switches User Manual, publication 1783-UM007 http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1783-um007_-en-p.pdf , for detailed instructions.
* Utilize proper network infrastructure controls, such as firewalls, to help ensure that SMTP packets from unauthorized sources are blocked.
* Consult the product documentation for specific features, such as a hardware key-switch setting, which may be used to block unauthorized changes, etc.
* Use trusted software, software patches, and antivirus/antimalware programs and interact only with trusted websites and attachments.
* Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet. For further information about the risks of unprotected Internet accessible control systems, please see Knowledgebase Article ID 494865 https://rockwellautomation.custhelp.com/app/answers/detail/a_id/494865/page/1 (login required).
* 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 a VPN is only as secure as the connected devices.
For more information please refer to Rockwell’s Security Advisory: https://rockwellautomation.custhelp.com/app/answers/detail/a_id/1075979 https://rockwellautomation.custhelp.com/app/answers/detail/a_id/1075979