V-213871

Discussion

If time stamps are not consistently applied and there is no common time reference, it is difficult to perform forensic analysis, in audit files, trace files/tables, and application data tables. Time is commonly expressed in Coordinated Universal Time (UTC), a modern continuation of Greenwich Mean Time (GMT), or local time with an offset from UTC. SQL Server obtains the date and time from the Windows operating system. In a normal configuration, the OS obtains them from an official time server, using Network Time Protocol (NTP). The ultimate source is the United States Naval Observatory Master Clock. SQL Server built-in functions for retrieving current timestamps are: (high precision) sysdatetime(), sysdatetimeoffset(), sysutcdatetime(); (lower precision) CURRENT_TIMESTAMP or getdate(), getutcdate(). Provided the operating system is synchronized with an official time server, these timestamp-retrieval functions are automatically compliant with this requirement, as are SQL Server's audit and trace capabilities.

Check Content

Verify that the Windows operating system is configured to synchronize with an official time server, using Network Time Protocol (NTP).

If it is not, and this is not documented, with justification and AO authorization, this is a finding.

If the OS does not synchronize with a time server, review the procedure for maintaining accurate time on the system.

If such a procedure does not exist, this is a finding.

If the procedure exists, review evidence that the correct time is actually maintained.

If the evidence indicates otherwise, this is a finding.