Isaca Certification CISM Book

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 htt 2 inet.com/resources/cyberglossary/backdoor 3

The best automated control to resolve the issue of security incidents not being appropriately escalated by the help desk is to integrate incident response workflow into the help desk ticketing system. This will ensure that the help desk staff follow the predefined steps and procedures for handling and escalating security incidents, based on the severity, impact, and urgency of each incident. The incident response workflow will also provide clear guidance on who to notify, when to notify, and how to notify the relevant stakeholders and authorities. This will improve the efficiency, effectiveness, and consistency of the incident response process.

References = CISM Review Manual, 16th Edition, page 2901; A Practical Approach to Incident Management Escalation2

The ultimate goal of an anti-phishing campaign is to reduce the risk and impact of phishing attacks on the organization. Therefore, the most relevant and reliable indicator of the effectiveness of an anti-phishing campaign is the decreased number of incidents that have occurred as a result of phishing. This metric shows how well the employees have learned to recognize and report phishing emails, and how well the security controls have prevented or mitigated the damage caused by phishing.

References = Five Ways to Achieve a Successful Anti-Phishing Campaign; Don’t click: towards an effective anti-phishing training. A comparative literature review; CISA, NSA, FBI, MS-ISAC Publish Guide on Preventing Phishing Intrusions

 A service provider is a third-party supplier that provides IT services or products to an organization. A service provider should comply with the organization’s information security requirements, such as policies, standards, procedures, and controls, to ensure the confidentiality, integrity, and availability of the organization’s data and systems. The best way to provide an information security manager with sufficient assurance that a service provider complies with the organization’s information security requirements is to have the ability to audit the third-party supplier’s IT systems and processes. An audit is a systematic and independent examination of evidence to determine the degree of conformity to predetermined criteria. An audit can verify the effectiveness and efficiency of the service provider’s security controls, identify any gaps or weaknesses, and provide recommendations for improvement. An audit can also ensure that the service provider adheres to the contractual obligations and service level agreements (SLAs) with the organization. Therefore, option B is the most appropriate answer.

Option A is not the best answer because a live demonstration of the third-party supplier’s security capabilities may not be comprehensive, objective, or reliable. A live demonstration may only show the positive aspects of the service provider’s security, but not reveal any hidden or potential issues. A live demonstration may also be subject to manipulation or deception by the service provider.

Option C is not the best answer because third-party security control self-assessment (CSA) results may not be accurate, complete, or consistent. A self-assessment is a process where the service provider evaluates its own security controls against a set of criteria or standards. A self-assessment may be biased, subjective, or incomplete, as the service provider may not disclose or report all the relevant information or issues. A self-assessment may also vary in quality and scope depending on the service provider’s expertise, resources, and methodology.

Option D is not the best answer because an independent review report indicating compliance with industry standards may not be sufficient or specific for the organization’s information security requirements. An independent review is a process where an external party evaluates the service provider’s security controls against a set of industry standards or best practices, such as ISO/IEC 27001, NIST CSF, PCI DSS, etc. An independent review report may provide a general overview of the service provider’s security posture, but not address the organization’s unique or specific security needs, risks, or expectations. An independent review report may also be outdated, limited, or generic, as the industry standards or best practices may not reflect the current or emerging security threats or trends. References = CISM Review Manual 15th Edition1, pages 257-258; CISM Review Questions, Answers & Explanations Database - 12 Month Subscription, QID 301.

An independent review report indicating compliance with industry standards BEST provides an information security manager with sufficient assurance that a service provider complies with the organization’s information security requirements. This is because an independent review report is an objective and reliable source of evidence that the service provider has implemented and maintained effective security controls that meet the industry standards and best practices. An independent review report can also provide assurance that the service provider has addressed any gaps or weaknesses identified in previous audits or assessments.