V-259464

Discussion

The audit system must be configured to record enforcement actions of access restrictions, including failed file read (-fr) attempts. Enforcement actions are the methods or mechanisms used to prevent unauthorized access and/or changes to configuration settings. One common and effective enforcement action method is using access restrictions (e.g., denying access to a file by applying file permissions). This configuration ensures that audit lists include events in which enforcement actions prevent attempts to read a file. Without auditing the enforcement of access restrictions, it is difficult to identify attempted attacks, as there is no audit trail available for forensic investigation. Satisfies: SRG-OS-000463-GPOS-00207,SRG-OS-000057-GPOS-00027,SRG-OS-000465-GPOS-00209,SRG-OS-000474-GPOS-00219

Check Content

Verify the macOS system is configured to audit all failed read actions on the system with the following command:

/usr/bin/awk -F':' '/^flags/ { print $NF }' /etc/security/audit_control | /usr/bin/tr ',' '\n' | /usr/bin/grep -Ec '\-fr'

If the result is not "1", this is a finding.