Isaca Updated CRISC Exam Questions and Answers by lia

The principle of least privilege is a key concept in information security that aims to provide users with the minimum level of access—or permissions—necessary to perform their job functions. Byensuring that users only have the access they need, organizations can significantly reduce the risk associated with excessive access by authorized users.

Understanding Least Privilege

The principle of least privilege restricts access rights for users to the bare minimum permissions they need to perform their work. This minimizes the potential damage from accidents or malicious activities.

Least privilege should be applied to all user accounts, including administrative and service accounts.

Implementation

Implementing least privilege involves a detailed analysis of job functions and the necessary access required for each role.

Regularly review and update access permissions to ensure they remain aligned with current job responsibilities and organizational needs.

Mitigating Risk

By limiting access to only what is necessary, organizations can prevent users from having permissions that could be exploited, intentionally or unintentionally, to cause harm.

This also includes revoking unnecessary privileges when users change roles or no longer need access.

Comparison with Other Options

A. Monitoring user activity using security logs: While monitoring can detect inappropriate activity, it does not prevent it.

B. Revoking access for users changing roles: This is a necessary practice but does not address the initial allocation of excessive privileges.

D. Conducting periodic reviews of authorizations granted: Periodic reviews are important but are reactive rather than proactive.

References

Sybex-CISSP-Official-Study-Guide-9-Edition.pdf, p. 641, discussing the principle of least privilege and its implementation​​.

If preventive controls cannot be implemented due to technology limitations, the first step to reduce risk is to evaluate alternative controls. Alternative controls are those that can achieve thesame or similar objectives as the original preventive controls, but using different methods or technologies. For example, if a firewall cannot be installed due to hardware compatibility issues, an alternative control could be a network segmentation or a proxy server. Evaluating alternative controls requires assessing their feasibility, effectiveness, efficiency, and cost-benefit. Redefining the business process, developing a plan to upgrade technology, and defining a process for monitoring risk are also possible actions to reduce risk, but they are not the first step, and they may not be feasible or desirable in some situations. References = Risk and Information Systems Control Study Manual, Chapter 4, Section 4.3.1, page 4-23.

A business impact analysis (BIA) is a process that identifies and assesses the effects that accidents, emergencies, disasters, and other unplanned, negative events could have on a business. The BIA (sometimes also called business impact assessment) predicts how a business will be affected by everything from a hurricane to a labor strike1.

One of the data that would be used when performing a BIA is the expected costs for recovering the business. This data can help to estimate the amount of resources and funds that would be needed to restore the normal operations and functions of the business after a disruption. The expected costs for recovering the business can include:

The costs of repairing or replacing damaged or lost assets, such as equipment, inventory, or facilities

The costs of hiring or training additional staff, or outsourcing some tasks or services

The costs of implementing alternative or backup systems or processes, such as cloud computing or manual procedures

The costs of communicating and coordinating with customers, suppliers, partners, regulators, and other stakeholders

The costs of complying with legal or contractual obligations, or paying fines or penalties

The costs of mitigating or preventing further losses or damages, such as insurance premiums or security measures23

The expected costs for recovering the business can help to determine the priority and urgency of the recovery activities, and to allocate the available resources and funds accordingly. The expected costs for recovering the business can also help to evaluate the cost-effectiveness and feasibility of the recovery strategies and options, and to justify the investment in the business continuity planning and management4.

The other options are not the data that would be used when performing a BIA, but rather the data that would be used for other purposes or processes. A cost-benefit analysis of running the current business is a data that would be used to compare the advantages and disadvantages of different business decisions or alternatives, such as launching a new product or service, or expanding to a new market. A cost-benefit analysis can help to assess the profitability and viability of the current business, but it does not measure the impact of a disruption on the business5. A cost of regulatory compliance is a data that would be used toestimate the amount of resources and funds that would be required to meet the rules and standards set by the authorities or agencies that govern the business, such as laws, regulations, or policies. A cost of regulatory compliance can help to ensure the legality and accountability of the business, but it does not measure the impactof a disruption on the business. A projected impact of current business on future business is a data that would be used to forecast the potential outcomes and consequences of the current business activities or strategies on the future business performance and growth, such as sales, revenue, market share, or customer satisfaction. A projected impact of current business on future business can help to plan and optimize the future business, but it does not measure the impact of a disruption on the current business. References =

Business Impact Analysis | Ready.gov

Business Impact Analysis Toolkit | Smartsheet

Business Impact Analysis (BIA): Prepare for Anything [2023] • Asana

How To Conduct Business Impact Analysis in 8 Easy Steps - G2

Cost Benefit Analysis - ISACA

[Regulatory Compliance - ISACA]

[Impact Analysis - ISACA]

[CRISC Review Manual, 7th Edition]

Unvalidated AI outputs pose considerable integrity and operational risks, potentially leading to erroneous decisions or compliance lapses. ISACA CRISC guidance underscores that ensuring results validity is a highest-priority control for new technologies such as AI.