Isaca Updated CISM Exam Questions and Answers by yasmin

The level of protection for an information asset should be based on the impact to the business function that depends on the asset. The impact to the business function reflects the value and criticality of the information asset to the organization, and the potential consequences of its loss, compromise, or unavailability. The impact to the business function can be measured in terms of financial, operational, reputational, legal, or strategic effects. The higher the impact, the higher the level of protection required.

Impact on information security program, cost of controls, and cost to replace are not the best factors to provide guidance when deciding the level of protection for an information asset. Impact on information security program is a secondary effect that depends on the impact to the business function. Cost of controls and cost to replace are important considerations for implementing and maintaining the protection, but they do not determine the level of protection needed. Cost of controls and cost to replace should be balanced with the impact to the business function and the risk appetite of the organization. References = CISM Certified Information Security Manager Study Guide, Chapter 2: Information Risk Management, page 671; CISM Foundations: Module 2 Course, Part One: Information Risk Management2; CISM Review Manual 15th Edition, Chapter 2: Information Risk Management, page 693

When deciding the level of protection for an information asset, the most important factor to consider is the impact to the business function. The value of the asset should be evaluated in terms of its importance to the organization's operations and how its security posture affects the organization's overall security posture. Additionally, the cost of implementing controls, the potential impact on the information security program, and the cost to replace the asset should be taken into account when determining the appropriate level of protection for the asset.

A buffer overflow is a software coding error or vulnerability that occurs when a function is carried out with more data than the function can handle, resulting in adjacent memory locations being overwritten or corrupted by the excess data1. A program contains a hidden and unintended function that presents a security risk is not a buffer overflow, but rather a backdoor2. Malicious code designed to interfere with normal operations is not a buffer overflow, but rather malware3. A type of covert channel that captures data is not a buffer overflow, but rather a keylogger. References: 1 https://www.fortinet.com/resources/cyberglossary/buffer-overflow 2 https://www.fortinet.com/resources/cyberglossary/backdoor 3 https://www.fortinet.com/resources/cyberglossary/malware https://www.fortinet.com/resources/cyberglossary/keylogger

“A successful security program requires management support and involvement. One of the key aspects of management support is to decide on the value of assets and the acceptable level of risk for them. This will help define the security objectives and priorities for the program. The other options are possible activities within a security program, but they are not as important as management decision on asset value.”

The greatest benefit of information asset classification is providing a basis for imple-menting a need-to-know policy. Information asset classification is a process of catego-rizing information based on its level of sensitivity and importance, and applying appro-priate security controls based on the level of risk associated with that information1. A need-to-know policy is a principle that states that access to information should be granted only to those individuals who require it to perform their official duties or tasks2. The purpose of a need-to-know policy is to limit the exposure of sensitive information to unauthorized or unnecessary parties, and to reduce the risk of data breaches, leaks, or misuse. Information asset classification provides a basis for implementing a need-to-know policy by:

•Defining the value and protection requirements of different types of information

•Labeling the information with the appropriate classification level, such as public, internal, confidential, secret, or top secret

•Establishing the roles and responsibilities of information owners, custodians, and users

•Enforcing access controls and encryption for the information

•Documenting the security policies and procedures for the information

By providing a basis for implementing a need-to-know policy, information asset classi-fication can help organizations to protect their sensitive information, comply with rele-vant laws and regulations, and achieve their business objectives. The other options are not the greatest benefits of information asset classification. Helping to determine the recovery point objective (RPO) is not a benefit, but rather a consequence of applying security controls based on the classification level. RPO is the acceptable amount of data loss in case of a disruption3. Supporting segregation of duties is not a benefit, but rather a prerequisite for implementing a need-to-know policy. Segregation of duties is a principle that states that no single individual should have control over two or more phases of a business process or transaction that are susceptible to errors or fraud4. De-fining resource ownership is not a benefit, but rather a component of information asset classification. Resource ownership is the assignment of accountability and authority for an information asset to an individual or a group5. References: 1: Information Classifi-cation - Advisera 2: Need-to-Know Principle - NIST 3: Recovery Point Objective - NIST 4: Segregation of Duties - NIST 5: Resource Ownership - NIST : Information Classification in Information Security - GeeksforGeeks : Information Asset Classification Policy - UCI