Isaca Updated CISM Exam Questions and Answers by camille

= According to the CISM Manual1, risk is defined as the combination of the probability of an event and its consequence. Therefore, determining the risk for a particular threat/vulnerability pair before controls are applied can be expressed as a function of the likelihood and impact, should a threat exploit a vulnerability. Likelihood is the probability or frequency of a threat occurring, while impact is the magnitude or severity of the harm or loss that would result from a threat exploiting a vulnerability. The higher the likelihood and impact, the higher the risk. The lower the likelihood and impact, the lower the risk.

The other options are not correct because they do not capture the full expression of risk. Option B only considers the impact, but not the likelihood, of a threat exploiting a vulnerability. Option C confuses the risk with the risk response, which is the action taken to reduce or mitigate the risk. Option D only considers the likelihood, but not the impact, of a threat attempting to exploit a vulnerability.

References = CISM Manual1, Chapter 2: Information Risk Management (IRM), Section 2.1: Risk Concepts2

1: https://store.isaca.org/s/store#/store/browse/cat/a2D4w00000Ac6NNEAZ/tiles 2: 2

Redirecting the attacker’s traffic is a viable containment strategy for a distributed denial of service (DDoS) attack because it helps to divert the malicious traffic away from the target server and reduce the impact of the attack. A DDoS attack is an attempt by attackers to overwhelm a server or a network with a large volume of requests or packets, preventing legitimate users from accessing the service or resource. Redirecting the attacker’s traffic is a technique that involves changing the DNS settings or routing tables to send the attacker’s traffic to another destination, such as a sinkhole, a honeypot, or a scrubbing center. A sinkhole is a server that absorbs and discards the malicious traffic. A honeypot is a decoy server that mimics the target server and collects information about the attacker’s behavior and techniques. A scrubbing center is a service that filters out the malicious traffic and forwards only the legitimate traffic to the target server. Redirecting the attacker’s traffic helps to contain the DDoS attack by reducing the load on the target server and preserving its availability and performance. Therefore, redirecting the attacker’s traffic is the correct answer.

 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.