The macOS system must compare internal information system clocks at least every 24 hours with a server that is synchronized to one of the redundant United States Naval Observatory (USNO) time servers or a time server designated for the appropriate DOD network (NIPRNet/SIPRNet) and/or the Global Positioning System (GPS).

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-257151	APPL-13-000014	SV-257151r922872_rule		Medium

Description
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. Sources outside of the configured acceptable allowance (drift) may be inaccurate. 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 endpoints that may not have regular access to the authoritative time server (e.g., mobile, teleworking, and tactical endpoints). Satisfies: SRG-OS-000355-GPOS-00143, SRG-OS-000356-GPOS-00144

Description

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. Sources outside of the configured acceptable allowance (drift) may be inaccurate. 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 endpoints that may not have regular access to the authoritative time server (e.g., mobile, teleworking, and tactical endpoints). Satisfies: SRG-OS-000355-GPOS-00143, SRG-OS-000356-GPOS-00144

STIG	Date
Apple macOS 13 (Ventura) Security Technical Implementation Guide	2023-08-28

Details

Check Text ( C-60836r922871_chk )
Verify the macOS system is configured with the timed service enabled and an authorized time server with the following commands: /usr/bin/sudo /usr/sbin/systemsetup -getusingnetworktime Network Time: On If "Network Time" is not set to "On", this is a finding. /usr/bin/sudo /usr/sbin/systemsetup -getnetworktimeserver If no time server is configured, or if an unapproved time server is in use, this is a finding.

Check Text ( C-60836r922871_chk )

Verify the macOS system is configured with the timed service enabled and an authorized time server with the following commands:

/usr/bin/sudo /usr/sbin/systemsetup -getusingnetworktime

Network Time: On

If "Network Time" is not set to "On", this is a finding.

/usr/bin/sudo /usr/sbin/systemsetup -getnetworktimeserver

If no time server is configured, or if an unapproved time server is in use, this is a finding.

Fix Text (F-60777r905085_fix)
Configure the macOS system to enable the timed service and set an authorized time server with the following commands: /usr/bin/sudo /usr/sbin/systemsetup -setusingnetworktime on /usr/bin/sudo /usr/sbin/systemsetup -setnetworktimeserver "server"