The HP FlexFabric Switch must synchronize internal information system clocks to the authoritative time source when the time difference is greater than the organization-defined time period.

From HP FlexFabric Switch NDM Security Technical Implementation Guide

Part of SRG-APP-000372-NDM-000297

Associated with: CCI-002046

SV-80739r1_rule The HP FlexFabric Switch must synchronize internal information system clocks to the authoritative time source when the time difference is greater than the organization-defined time period.

Vulnerability discussion

Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. Synchronizing internal information system clocks provides uniformity of time stamps for information systems with multiple system clocks and systems connected over a network. Organizations should consider setting time periods for different types of systems (e.g., financial, legal, or mission-critical systems). Organizations should also consider endpoints that may not have regular access to the authoritative time server (e.g., mobile, teleworking, and tactical endpoints). This requirement is related to the comparison done every 24 hours in CCI-001891 because a comparison must be done in order to determine the time difference.The organization-defined time period will depend on multiple factors, most notably the granularity of time stamps in audit logs. For example, if time stamps only show to the nearest second, there is no need to have accuracy of a tenth of a second in clocks.

Check content

Check the HP FlexFabric Switch configuration to determine if it synchronizes internal information system clocks to the authoritative time source when the time difference is greater than the organization-defined time period. [HP] display ntp status Clock status: synchronized Clock stratum: 4 System peer: 16.110.135.123 Local mode: client Reference clock ID: 16.110.135.123 Leap indicator: 00 Clock jitter: 0.004227 s Stability: 0.000 pps Clock precision: 2^-19 Root delay: 96.75598 ms Root dispersion: 149.76501 ms Reference time: d916fabd.a5c6d326 Mon, Jun 1 2015 9:37:33.647 If this synchronization is not occurring when the time difference is greater than the organization-defined time period, this is a finding.

Fix text

Configure the HP FlexFabric Switch to synchronize internal information system clocks to the authoritative time source when the time difference is greater than the organization-defined time period. [HP] ntp enable [HP] ntp unicast-server 16.110.135.123

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