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CCI-004924

CCI-004924 Definition

Defines the frequency for comparing the internal system clocks with organization-defined authoritative time source.

Status
Type	CheckType.technical

Master Assessment Datasheet

Implementation Guidance

Determine if the internal system clocks are compared [SC-45(01)_ODP[01]; the frequency at which to compare the internal system clocks with the authoritative time source is defined] with [SC-45(01)_ODP[02]; the authoritative time source to which internal system clocks are to be compared is defined].

Validation Procedures

Examine: [SELECT FROM: System and communications protection policy; procedures addressing time synchronization; system design 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 installing, configuring, and/or maintaining the system]. Test: [SELECT FROM: Mechanisms supporting and/or implementing system time synchronization].

Related Controls

The controls below (if any) were marked by NIST as being related to CCI-004924.

Control	Description
SC-45(1)	(a): Compare the internal system clocks [the frequency at which to compare the internal system clocks with the authoritative time source is defined;] with [the authoritative time source to which internal system clocks are to be compared is defined;] ; and (b): Synchronize the internal system clocks to the authoritative time source when the time difference is greater than [the time period to compare the internal system clocks with the authoritative time source is defined;].

Control

Description

SC-45(1)

(a): Compare the internal system clocks [the frequency at which to compare the internal system clocks with the authoritative time source is defined;] with [the authoritative time source to which internal system clocks are to be compared is defined;] ; and

(b): Synchronize the internal system clocks to the authoritative time source when the time difference is greater than [the time period to compare the internal system clocks with the authoritative time source is defined;].