III - Administrative Public
Rules and Groups employed by this XCCDF Profile
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SRG-OS-000028-GPOS-00009
Group -
The macOS system must be configured to prevent Apple Watch from terminating a session lock.
Users must be prompted to enter their passwords when unlocking the screen saver. The screen saver acts as a session lock and prevents unauthorized users from accessing the current user's account.Rule Medium Severity -
SRG-OS-000028-GPOS-00009
Group -
The macOS system must retain the session lock until the user reestablishes access using established identification and authentication procedures.
Users must be prompted to enter their passwords when unlocking the screen saver. The screen saver acts as a session lock and prevents unauthorized users from accessing the current user's account.Rule Medium Severity -
SRG-OS-000028-GPOS-00009
Group -
The macOS system must initiate the session lock no more than five seconds after a screen saver is started.
A screen saver must be enabled and set to require a password to unlock. An excessive grace period impacts the ability for a session to be truly locked, requiring authentication to unlock.Rule Medium Severity -
SRG-OS-000029-GPOS-00010
Group -
The macOS system must initiate a session lock after a 15-minute period of inactivity.
A screen saver must be enabled and set to require a password to unlock. The timeout should be set to 15 minutes of inactivity. This mitigates the risk that a user might forget to manually lock the ...Rule Medium Severity -
SRG-OS-000030-GPOS-00011
Group -
The macOS system must be configured to lock the user session when a smart token is removed.
A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary...Rule Medium Severity -
SRG-OS-000031-GPOS-00012
Group -
The macOS system must conceal, via the session lock, information previously visible on the display with a publicly viewable image.
A default screen saver must be configured for all users, as the screen saver will act as a session time-out lock for the system and must conceal the contents of the screen from unauthorized users. ...Rule Low Severity -
SRG-OS-000031-GPOS-00012
Group -
The macOS system must be configured to disable hot corners.
Although hot corners can be used to initiate a session lock or launch useful applications, they can also be configured to disable an automatic session lock from initiating. Such a configuration int...Rule Medium Severity -
SRG-OS-000002-GPOS-00002
Group -
The macOS system must automatically remove or disable temporary and emergency user accounts after 72 hours.
If temporary user accounts remain active when no longer needed or for an excessive period, these accounts may be targeted by attackers to gain unauthorized access. To mitigate this risk, automated ...Rule Medium Severity -
SRG-OS-000355-GPOS-00143
Group -
The macOS system must, for networked systems, 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).
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 condu...Rule Medium Severity -
SRG-OS-000191-GPOS-00080
Group -
The macOS system must utilize an ESS solution and implement all DoD required modules.
The macOS system must employ automated mechanisms to determine the state of system components. The DoD requires the installation and use of an approved HBSS solution to be implemented on the operat...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
Group -
The macOS system must be integrated into a directory services infrastructure.
Distinct user account databases on each separate system cause problems with username and password policy enforcement. Most approved directory services infrastructure solutions allow centralized man...Rule High Severity -
SRG-OS-000329-GPOS-00128
Group -
The macOS system must enforce the limit of three consecutive invalid logon attempts by a user before the user account is locked.
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute forcing, is reduced. Limits are imposed by locking the a...Rule Medium Severity -
SRG-OS-000023-GPOS-00006
Group -
The macOS system must display the Standard Mandatory DoD Notice and Consent Banner before granting remote access to the operating system.
Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal ...Rule Medium Severity -
SRG-OS-000023-GPOS-00006
Group -
The macOS system must display the Standard Mandatory DoD Notice and Consent Banner before granting access to the system via SSH.
Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal ...Rule Medium Severity -
SRG-OS-000023-GPOS-00006
Group -
The macOS system must be configured so that any connection to the system must display the Standard Mandatory DoD Notice and Consent Banner before granting GUI access to the system.
Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal ...Rule Medium Severity -
SRG-OS-000057-GPOS-00027
Group -
The macOS system must be configured so that log files must not contain access control lists (ACLs).
The audit service must be configured to create log files with the correct permissions to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and users. ...Rule Medium Severity -
SRG-OS-000057-GPOS-00027
Group -
The macOS system must be configured so that log folders must not contain access control lists (ACLs).
The audit service must be configured to create log folders with the correct permissions to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and users...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
Group -
The macOS system must be configured with dedicated user accounts to decrypt the hard disk upon startup.
When "FileVault" and Multifactor Authentication are configured on the operating system, a dedicated user must be configured to ensure that the implemented Multifactor Authentication rules are enfor...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
Group -
The macOS system must be configured to disable password forwarding for FileVault2.
When "FileVault" and Multifactor Authentication are configured on the operating system, a dedicated user must be configured to ensure that the implemented Multifactor Authentication rules are enfor...Rule Medium Severity -
SRG-OS-000163-GPOS-00072
Group -
The macOS system must be configured with the SSH daemon ClientAliveInterval option set to 900 or less.
Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a communication session. In addition, quickly terminating an i...Rule Medium Severity -
SRG-OS-000163-GPOS-00072
Group -
The macOS system must be configured with the SSH daemon ClientAliveCountMax option set to 1.
Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port th...Rule Medium Severity -
SRG-OS-000163-GPOS-00072
Group -
The macOS system must be configured with the SSH daemon LoginGraceTime set to 30 or less.
SSH should be configured to log users out after a 15-minute interval of inactivity and to wait only 30 seconds before timing out logon attempts. Terminating an idle session within a short time peri...Rule Medium Severity -
SRG-OS-000033-GPOS-00014
Group -
The macOS system must implement approved ciphers within the SSH server configuration to protect the confidentiality of SSH connections.
Operating systems using encryption are required to use FIPS-compliant mechanisms for authenticating to macOS. For OpenSSH to utilize the Apple Corecrypto FIPS-validated algorithms, a specific conf...Rule High Severity -
SRG-OS-000033-GPOS-00014
Group -
The macOS system must implement approved Message Authentication Codes (MACs) within the SSH server configuration.
Operating systems using encryption are required to use FIPS-compliant mechanisms for authenticating to macOS. For OpenSSH to utilize the Apple Corecrypto FIPS-validated algorithms, a specific conf...Rule High Severity -
SRG-OS-000033-GPOS-00014
Group -
The macOS system must implement approved Key Exchange Algorithms within the SSH server configuration.
Operating systems using encryption are required to use FIPS-compliant mechanisms for authenticating to macOS. For OpenSSH to utilize the Apple Corecrypto FIPS-validated algorithms, a specific conf...Rule High Severity
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