CISA-KR 문제 166
The first action that an IS auditor should take when finding a high-risk vulnerability in a public-facing web server used to process online customer payments is to identify compensating controls. Compensating controls are alternative or additional controls that provide reasonable assurance of mitigating the risk of exploiting the vulnerability. The IS auditor should assess the effectiveness of the compensating controls and determine whether they reduce the risk to an acceptable level. If not, the IS auditor should recommend remediation actions to address the vulnerability. Documenting the exception in an audit report is an important action, but it should not be the first action, as it does not address the urgency of the situation. Reviewing security incident reports is a useful action, but it should not be the first action, as it does not provide assurance of preventing future incidents. Notifying the audit committee is a necessary action, but it should not be the first action, as it does not involve taking any corrective measures. References:
CISA Review Manual, 27th Edition, pages 295-2961
CISA Review Questions, Answers & Explanations Database, Question ID: 260
CISA-KR 문제 167
The most critical finding that the IS auditor should consider when reviewing processes for importing market price data from external data providers is that the quality of the data is not monitored. This is because market price data is essential for financial transactions, risk management, valuation and reporting, and any errors or inaccuracies in the data can have significant impact on the organization's performance, reputation and compliance. The IS auditor should ensure that the organization has established quality criteria and controls for the imported data, such as validity, completeness, timeliness, consistency and accuracy, and that the data is regularly checked and verified against these criteria. The other findings are also important, but not as critical as data quality. References: CISA Review Manual (Digital Version)1, Chapter 5, Section 5.2.7
CISA-KR 문제 168
A web-based CRM system that is directly accessed by customers via the Internet should be hosted in a secure and isolated environment to protect it from external threats and unauthorized access. A web-based CRM system should also be reliable, trusted, and backed up regularly1.
Hosting the system on an external third-party service provider's servers (A) or a hybrid-cloud platform managed by a service provider (B) may not be a concern for the auditor if the service provider has adequate security measures and service level agreements in place. The auditor should verify the security controls and contractual terms of the service provider before trusting them with the CRM data23.
Hosting the system within a demilitarized zone (DMZ) of a corporate network is a common practice to provide an extra layer of security to the CRM system from untrusted networks, such as the Internet. A DMZ is a perimeter network that isolates the CRM system from the internal network and filters the incoming traffic from the external network using a security gateway4567.
Hosting the system within an internal segment of a corporate network (D) is a concern for the auditor because it exposes the CRM system and the internal network to potential attacks from the Internet. The CRM system should not be directly accessible from the Internet without a DMZ or a firewall to protect it. This could compromise the confidentiality, integrity, and availability of the CRM data and the internal network78.
CISA-KR 문제 169
The auditor implemented a specific control during the development of the system. This would impair the auditor's independence, as it would create a self-review threat, which is a situation where an auditor has to evaluate or review the results of his or her own work or judgment1. A self-review threat may compromise the auditor's objectivity and impartiality, as the auditor may be biased or influenced by his or her own involvement or interest in the system1. The auditor may also face a conflict of interest or a loss of credibility if he or she has to report on any issues or deficiencies related to the control he or she implemented.
CISA-KR 문제 170
An IS auditor reviewing the threat assessment for a data center would be most concerned if the exercise was completed by local management, because this could introduce bias, conflict of interest, or lack of expertise in the assessment process. A threat assessment is a systematic method of identifying and evaluating the potential threats that could affect the availability, integrity, or confidentiality of the data center and its assets. A threat assessment should be conducted by an independent and qualified team that has the necessary skills, knowledge, and experience to perform a comprehensive and objective analysis of the data center's environment, vulnerabilities, and risks1.
The other options are not as concerning as option C for an IS auditor reviewing the threat assessment for a data center. Option A, some of the identified threats are unlikely to occur, is not a problem as long as the likelihood and impact of each threat are properly estimated and prioritized. A threat assessment should consider all possible scenarios, even if they have a low probability of occurrence, to ensure that the data center is prepared for any eventuality2. Option B, all identified threats relate to external entities, is not a flaw as long as the assessment also considers internal threats, such as human errors, malicious insiders, or equipment failures. External threats are often more visible and severe than internal threats, but they are not the only source of risk for a data center3. Option D, neighboring organizations' operations have been included, is not a mistake as long as the assessment also focuses on the data center's own operations. Neighboring organizations' operations may have an impact on the data center's security and availability, especially if they share physical or network infrastructure or resources. A threat assessment should take into account the interdependencies and interactions between the data center and its external environment4.
References:
ISACA, CISA Review Manual, 27th Edition, 2019
ISACA, CISA Review Questions, Answers & Explanations Database - 12 Month Subscription Data Center Threats and Vulnerabilities1 Datacenter threat, vulnerability, and risk assessment2 Data Centre Risk Assessment3
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