Free ISA-IEC-62443 ISA Updates

According to the ISA/IEC 62443-2-1 standard, a review of the CSMS should be triggered by any changes that affect the cybersecurity risk of the industrial automation and control system (IACS), such as new technical controls, organizational restructuring, or security incidents1. Budgeting is not a trigger for CSMS review, unless it impacts the cybersecurity risk level or the CSMS itself2. References: 1: ISA/IEC 62443-2-1:2010, Section 4.3.3.3 2: A Practical Approach to Adopting the IEC 62443 Standards, ISAGCA Blog3

According to ISA/IEC 62443-2-4, which defines security requirements for IACS service providers, four maturity levels (ML1–ML4) are established as evaluation criteria for measuring the maturity of cybersecurity practices.

These are:

ML1 – Initial

ML2 – Managed

ML3 – Defined

ML4 – Improving

“This standard defines four maturity levels (ML1 through ML4) to assess the extent of cybersecurity process implementation for service providers.”

— ISA/IEC 62443-2-4:2015, Clause 5.1 – Maturity Level Overview

These maturity levels are used to benchmark and certify service provider practices across different domains like patching, access control, and incident response.

ISA/IEC TR 62443-1-5 defines the rules for creating cybersecurity profiles. The key principle is preservation of standard integrity.

Step 1: Purpose of profiles

Profiles allow selection and scoping of existing requirements for specific industries or applications.

Step 2: Restriction on modification

The technical report explicitly states that no new security requirements may be added, and existing requirements must not be altered. This ensures interoperability, auditability, and certification consistency.

Step 3: Correct approach

Profiles may select, exclude, or contextualize requirements, but they cannot redefine them.

Therefore, Option C is correct.

The document titled “Patch Management in the IACS Environment” corresponds to IEC TR 62443-2-3, which belongs to the Policies and Procedures category of the ISA/IEC 62443 series.

IEC TR 62443-2-3 is a technical report providing guidance for managing software updates and patches in IACS environments without disrupting critical operations.

From the IEC 62443 document structure:

“The -2-x family of documents focuses on policies and procedures, especially in relation to the asset owner responsibilities within a CSMS (Cyber Security Management System).”

IEC TR 62443-2-3 specifically describes:

“Recommended practices for planning and executing the patch management process for industrial control systems in a structured and secure manner.”

Incorrect Options:

A. System – System-level requirements are found in 62443-3-x.

B. General – General documents include 62443-1-x, focused on terminology and concepts.

C. Component – Component requirements are covered in 62443-4-x documents.