SC-5(3)

Requirement
1. Employ the following monitoring tools to detect indicators of denial-of-service attacks against, or launched from, the system: [Assignment: organization-defined monitoring tools]; and
2. Monitor the following system resources to determine if sufficient resources exist to prevent effective denial-of-service attacks: [Assignment: organization-defined system resources].

Discussion

Organizations consider the utilization and capacity of system resources when managing risk associated with a denial of service due to malicious attacks. Denial-of-service attacks can originate from external or internal sources. System resources that are sensitive to denial of service include physical disk storage, memory, and CPU cycles. Techniques used to prevent denial-of-service attacks related to storage utilization and capacity include instituting disk quotas, configuring systems to automatically alert administrators when specific storage capacity thresholds are reached, using file compression technologies to maximize available storage space, and imposing separate partitions for system and user data.

NIST 800-53A Assessment Guidance

Examine

[SELECT FROM: System and communications protection policy; procedures addressing denial-of-service protection; system design documentation; system monitoring tools and techniques documentation; system configuration settings and associated documentation; system audit records; system security plan; other relevant documents or records].

Interview

[SELECT FROM: System/network administrators; organizational personnel with information security responsibilities; organizational personnel with detection and monitoring responsibilities].

Test

[SELECT FROM: Mechanisms/tools implementing system monitoring for denial-of-service attacks].

ID	Assessment Objectives
SC-05(03)(a)	<SC-05(03)_ODP[01] monitoring tools> are employed to detect indicators of denial-of-service attacks against or launched from the system;
SC-05(03)(b)	<SC-05(03)_ODP[02] system resources> are monitored to determine if sufficient resources exist to prevent effective denial-of-service attacks.

Our CMMC Overview Course simplifies CMMC. Enroll so you can make informed decisions!