Golden Rule 15

 Follow the Principle of Least Privilege

Meaning:
Give users, applications, and services only the minimum access rights necessary to perform their tasks. Avoid granting unnecessary permissions.

Why it matters:

1. Improves security: Reduces the risk of accidental or malicious misuse.

2. Limits damage: If an account is compromised, the potential impact is minimized.

3. Enhances compliance: Many regulations require strict access controls.

4. Reduces human error: Users can’t accidentally modify or delete critical systems or data.

Best Practices:

• Review permissions regularly and remove unnecessary access.

• Apply role-based access control (RBAC) where possible.

• Avoid giving admin/root privileges unless absolutely required.

• Use temporary elevated privileges only when needed.

• Audit and log access to sensitive systems for accountability.

  PoLP in the Context of ITIL

  While ITIL (Information Technology Infrastructure Library) doesn't explicitly define the Principle of Least Privilege, it emphasizes the importance of security and access control within its processes.

  Relevant ITIL Processes:

  • Change Management: Ensures that changes to IT services are made with minimal risk and disruption. Implementing PoLP can prevent unauthorized changes and reduce potential security vulnerabilities.

  • Access Management: Focuses on granting authorized users the right to use a service while preventing access to unauthorized users. PoLP is integral to this process, ensuring users have only the access necessary for their roles.

  • Information Security Management: Aims to protect the confidentiality, integrity, and availability of information. Adhering to PoLP helps in safeguarding sensitive data and systems.