Rockwell Automation AllenBradley MicroLogix Security Update

Number: AV17-074
Date: 25 May 2017


The purpose of this advisory is to bring attention to a recently released security update for the AllenBradley MicroLogix 1100 and 1400 programmablelogic controller products.


Rockwell Automation has released a security update to address 5 vulnerabilities in its AllenBradley MicroLogix 1100 and 1400 programmablelogic controller products. The severity of the vulnerabilities in range from medium to critical, and exploitation could allow an unprivileged attacker to remotely execute code and/or create denial of service conditions.

Affected software versions (AllenBradley MicroLogix 1100):

Affected software versions (AllenBradley MicroLogix 1400):

CVE References:
CVE20177898, CVE20177899, CVE20177901, CVE20177902, CVE20177903

Suggested Action

CCIRC recommends that system administrators test and deploy the vendorreleased updates to affected devices per your change management policies.


Note to Readers

In support of Public Safety's mission to build a safe and resilient Canada, CCIRC's mandate is to help ensure the security and resilience of the vital non-federal government cyber systems that underpin Canada's national security, public safety and economic prosperity. As Canada's computer security incident response team, CCIRC is Canada's national coordination centre for the prevention and mitigation of, preparedness for, response to, and recovery from cyber incidents on non-federal government systems. It does this by providing authoritative advice and support, and coordinating information sharing and incident response.

Please note, CCIRC PGP key has recently been updated.

For general information, please contact Public Safety Canada's Public Affairs division at:

Telephone: 613-944-4875 or 1-800-830-3118
Fax: 613-998-9589

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