ISO 27001 Annex A 8.19 Installation of Software on Operational Systems

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What is ISO 27001 Installation of Software on Operational Systems?

ISO 27001 Annex A 8.19 Installation of Software on Operational Systems is an ISO 27001 control that requires us to manage software installation on operational systems.

Purpose

ISO 27001 Annex A 8.19 is a preventive control to ensure the integrity of operational systems and prevent exploitation of technical vulnerabilities.

Definition

The ISO 27001 standard defines ISO 27001 Annex A 8.19 as:

Procedures and measures should be implemented to securely manage software installation on operational systems.

ISO27001:2022 Annex A 8.19 Installation of Software on Operational Systems

Implementation Guide

This control is looking for us to install software into our operational environment in a controlled manner. In smaller businesses it can be the case that anyone can install anything and that there is no process in place. It can also be the case that everyone has local admin rights to devices.

To implement this control you will put in place a process to manage the software installation process that records evidences of what has happened for audit purposes and you will implement some technical controls that will restrict the ability for certain users to install software.

This is usually owned by the Head of IT and managed by the IT department. Software has licence requirements that must be met and the impact of software and changes can be far reaching and detrimental to the organisation. It is therefore practical to limit the use to trusted and authorised users.

To do this you will put in place a process for the request and approving of software installation that you are able to evidence when the time of the audit comes. Of course, you will ensure that the person making the request is not the same person that approves it. This will ensure segregation of duty. As part of this process you would document the authorisation levels but in practical terms, in a smaller organisation, this tends to be on person / role and in all likelihood the Head of IT that approves it.

As part of the implementation it is good practice to restrict the installation on systems. This will prevent these tools from being installed by any old Tom, Dick or Harry. Once approved you want to have in place a process that the instigates the installation of the software.

Considerations for the installation of software would include:

  • Implement and approved software list and educate people on what is, and what is not, allowed
  • Implement software under license
  • Implement software that is supported
  • Implement software on the principle of least privilege
  • Testing of software before installing
  • Following the change management process and including a rollback / back out strategy
  • Maintaining a change and audit log of all updates
  • Not including development code on operational systems.
  • Where software is installed by a third party, following your access control to restrict access to systems and the time that access is allowed. The third party should be monitored.

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ISO 27001 Toolkit Business Edition

What will an auditor check?

The audit is going to check a number of areas. Lets go through the main ones

That you have documentation

What this means is that you need to show that you have documented your Installation of Software on Operational Systems. Can you show a list of what software installed, that it is licensed, the version and which users access it?. Are you able to evidence a request and approval process and tie that to the list of users and software to show the process was followed.

That you have have implemented Installation of Software on Operational Systems appropriately

They will look at systems to seek evidence of software. They will question you on the process and seek evidence that you have followed it. They want to see evidence of software installation and the process in operation.

That you have conducted internal audits

The audit will want to see that you have tested the controls and evidenced that they are operating. This is usually in the form of the required internal audits. They will check the records and outputs of those internal audits.

ISO 27001 Toolkit Business Edition

Do It Yourself ISO 27001

ISO 27001:2022 requirements

Organisational Controls - A5

ISO 27001 Annex A 5.1 Policies for information security

ISO 27001 Annex A 5.2 Information Security Roles and Responsibilities

ISO 27001 Annex A 5.3 Segregation of duties

ISO 27001 Annex A 5.4 Management responsibilities

ISO 27001 Annex A 5.5 Contact with authorities

ISO 27001 Annex A 5.6 Contact with special interest groups

ISO 27001 Annex A 5.7 Threat intelligence – new

ISO 27001 Annex A 5.8 Information security in project management

ISO 27001 Annex A 5.9 Inventory of information and other associated assets – change

ISO 27001 Annex A 5.10 Acceptable use of information and other associated assets – change

ISO 27001 Annex A 5.11 Return of assets

ISO 27001 Annex A 5.11 Return of assets

ISO 27001 Annex A 5.13 Labelling of information

ISO 27001 Annex A 5.14 Information transfer

ISO 27001 Annex A 5.15 Access control

ISO 27001 Annex A 5.16 Identity management

ISO 27001 Annex A 5.17 Authentication information – new

ISO 27001 Annex A 5.18 Access rights – change

ISO 27001 Annex A 5.19 Information security in supplier relationships

ISO 27001 Annex A 5.20 Addressing information security within supplier agreements

ISO 27001 Annex A 5.21 Managing information security in the ICT supply chain – new

ISO 27001 Annex A 5.22 Monitoring, review and change management of supplier services – change

ISO 27001 Annex A 5.23 Information security for use of cloud services – new

ISO 27001 Annex A 5.24 Information security incident management planning and preparation – change

ISO 27001 Annex A 5.25 Assessment and decision on information security events 

ISO 27001 Annex A 5.26 Response to information security incidents

ISO 27001 Annex A 5.27 Learning from information security incidents

ISO 27001 Annex A 5.28 Collection of evidence

ISO 27001 Annex A 5.29 Information security during disruption – change

ISO 27001 Annex A 5.31 Identification of legal, statutory, regulatory and contractual requirements

ISO 27001 Annex A 5.32 Intellectual property rights

ISO 27001 Annex A 5.33 Protection of records

ISO 27001 Annex A 5.34 Privacy and protection of PII

ISO 27001 Annex A 5.35 Independent review of information security

ISO 27001 Annex A 5.36 Compliance with policies and standards for information security

ISO 27001 Annex A 5.37 Documented operating procedures 

Technology Controls - A8

ISO 27001 Annex A 8.1 User Endpoint Devices

ISO 27001 Annex A 8.2 Privileged Access Rights

ISO 27001 Annex A 8.3 Information Access Restriction

ISO 27001 Annex A 8.4 Access To Source Code

ISO 27001 Annex A 8.5 Secure Authentication

ISO 27001 Annex A 8.6 Capacity Management

ISO 27001 Annex A 8.7 Protection Against Malware

ISO 27001 Annex A 8.8 Management of Technical Vulnerabilities

ISO 27001 Annex A 8.9 Configuration Management 

ISO 27001 Annex A 8.10 Information Deletion

ISO 27001 Annex A 8.11 Data Masking

ISO 27001 Annex A 8.12 Data Leakage Prevention

ISO 27001 Annex A 8.13 Information Backup

ISO 27001 Annex A 8.14 Redundancy of Information Processing Facilities

ISO 27001 Annex A 8.15 Logging

ISO 27001 Annex A 8.16 Monitoring Activities

ISO 27001 Annex A 8.17 Clock Synchronisation

ISO 27001 Annex A 8.18 Use of Privileged Utility Programs

ISO 27001 Annex A 8.19 Installation of Software on Operational Systems

ISO 27001 Annex A 8.20 Network Security

ISO 27001 Annex A 8.21 Security of Network Services

ISO 27001 Annex A 8.22 Segregation of Networks

ISO 27001 Annex A 8.23 Web Filtering

ISO 27001 Annex A 8.24 Use of CryptographyISO27001 Annex A 8.25 Secure Development Life Cycle

ISO 27001 Annex A 8.26 Application Security Requirements

ISO 27001 Annex A 8.27 Secure Systems Architecture and Engineering Principles

ISO 27001 Annex A 8.28 Secure Coding

ISO 27001 Annex A 8.29 Security Testing in Development and Acceptance

ISO 27001 Annex A 8.30 Outsourced Development

ISO 27001 Annex A 8.31 Separation of Development, Test and Production Environments

ISO 27001 Annex A 8.32 Change Management

ISO 27001 Annex A 8.33 Test Information

ISO 27001 Annex A 8.34 Protection of information systems during audit testing