Isaca CISM Online Access

 When investigating an information security incident, details of the incident should be shared only as needed, according to the principle of least privilege and the need-to-know basis. This means that only the authorized and relevant parties who have a legitimate purpose and role in the incident response process should have access to the incident information, and only to the extent that is necessary for them to perform their duties. Sharing incident details only as needed helps to protect the confidentiality, integrity, and availability of the incident information, as well as the privacy and reputation of the affected individuals and the organization. Sharing incident details only as needed also helps to prevent unauthorized disclosure, modification, deletion, or misuse of the incident information, which could compromise the investigation, evidence, remediation, or legal actions.

References = CISM Review Manual, 16th Edition, Chapter 4: Information Security Incident Management, Section: Incident Response Process, page 2311; CISM Review Questions, Answers & Explanations Manual, 10th Edition, Question 49, page 462.

Validating the authenticity of the patch is the first step in patch management procedures when receiving an emergency security patch, as it helps to ensure that the patch is genuine and not malicious. Validating the authenticity of the patch can be done by verifying the source, signature, checksum, or certificate of the patch, and comparing it with the information provided by the software vendor or manufacturer. Installing an unverified patch may introduce malware, compromise the system, or cause unexpected errors or conflicts.

References = CISM Review Manual 2022, page 3131; CISM Exam Content Outline, Domain 4, Task 4.42; Practical Patch Management and Mitigation1; Vulnerability and patch management in the CISSP exam3

The results of a risk assessment would best enable an informed decision by senior management when developing a business case to justify an information security investment. A risk assessment will help to identify and prioritize the threats and vulnerabilities that affect the organization’s assets and processes, as well as the potential impact and likelihood of occurrence. A risk assessment will also provide a basis for selecting and evaluating the effectiveness of controls to mitigate the risks. According to CISA, developing a business case for security will be based on an in-depth understanding of organizational vulnerabilities, operational priorities, and return on investment1. The information security strategy, losses due to security incidents, and security investment trends in the industry are possible inputs or outputs of a risk assessment, but they are not sufficient to enable an informed decision by senior management. References: 1: The Business Case for Security - CISA 2: The Business Case for Security | CISA 3: #HowTo: Build a Business Case for Cybersecurity Investment 4: Making the Business Case for Information Security