The Cyber Security Review | Friday, October 20, 2023
A security risk assessment identifies and prioritizes computing system risks, while a vulnerability assessment identifies and remediates organizational vulnerabilities. Both aspects help mitigate risks and ensure overall security.
Fremont, CA: Conducting a risk assessment is crucial for organizations to assess the exploitability of their infrastructure and application portfolio, aiding in informed decision-making on resource allocation, tools, and security controls implementation.
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The Step-by-Step Risk Assessment Process
Establish the Risk Assessment's Purpose.
The first step in risk assessment is determining the scope, which can include an entire organization, business units, locations, or components like payment processing. Stakeholders should be involved in identifying processes, assets, risks, impacts, and risk tolerance levels. Learning relevant terminology, including likelihood and impact, helps standardize risk and ensures accurate communication. Organizations should also review frameworks like NIST SP 800-37 and ISO/IEC 27001 for guidance on adequate security controls.
Identification of Threats and Vulnerabilities
A threat is an event that can cause damage to an organization's assets or processes and can be internal, external, malicious, or accidental. Vulnerabilities are flaws that expose a company to potential threats. Identifying vulnerabilities using methods like automated scanning, auditing, penetration testing, vendor security advisories, and application security testing (AST) is crucial. Analyzing not only technical but also physical and process flaws is essential. For instance, a data center without physical access control is vulnerable to physical intrusion, while a server without malware protection is vulnerable to cyber threats.
Assess dangers and identify potential effects.
The next step is to assess the impact of identified risk scenarios on the organization. To determine potential risks, cybersecurity risk assessment considers factors like vulnerability discovery, exploitability, threat reproducibility, industry prevalence, and historical security incidents.
Prioritize the risks.
A risk matrix is a tool to classify risk scenarios and define a tolerance ratio. It can help determine three actions: avoid, transfer, and mitigate. Avoiding low-risk methods is best while transferring significant risks to third parties like cyber insurance or outsourcing can be a viable option. Mitigate risks within the internal team's operational scope by deploying security controls and measures. A risk assessment program must acknowledge the residual risk that may be missed or not fully addressed and be formally accepted by senior stakeholders as part of an organization's cybersecurity strategy.
Record each risk.
Regularly review and update identified risk scenarios to provide visibility of the current risk portfolio. This should include details of the risk scenario, identification date, security controls, risk level, mitigation plan, progress, and residual risk expected after mitigation. Each risk category should have a risk owner responsible for maintaining the threat. Cybersecurity risk assessment is an ongoing effort that requires time and resources. As new threats emerge, organizations must iteratively discover and address them, with a robust initial assessment providing a basis for subsequent assessments.
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