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Apple macOS 12 (Monterey) Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • The macOS system must be configured with Bluetooth turned off unless approved by the organization.

    <VulnDiscussion>Without protection of communications with wireless peripherals, confidentiality and integrity may be compromised because unpr...
    Rule Low Severity
  • SRG-OS-000324-GPOS-00125

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must prevent nonprivileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures.

    &lt;VulnDiscussion&gt;Preventing nonprivileged users from executing privileged functions mitigates the risk that unauthorized individuals or proces...
    Rule Medium Severity
  • SRG-OS-000033-GPOS-00014

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must implement approved ciphers within the SSH client configuration to protect the confidentiality of SSH connections.

    &lt;VulnDiscussion&gt;Operating systems using encryption are required to use FIPS-compliant mechanisms for authenticating to macOS. For OpenSSH to...
    Rule High Severity
  • SRG-OS-000033-GPOS-00014

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must implement approved Message Authentication Codes (MACs) within the SSH client configuration.

    &lt;VulnDiscussion&gt;Operating systems using encryption are required to use FIPS-compliant mechanisms for authenticating to macOS. For OpenSSH to...
    Rule High Severity
  • SRG-OS-000033-GPOS-00014

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must implement approved Key Exchange Algorithms within the SSH client configuration.

    &lt;VulnDiscussion&gt;Operating systems using encryption are required to use FIPS-compliant mechanisms for authenticating to macOS. For OpenSSH to...
    Rule High Severity
  • SRG-OS-000028-GPOS-00009

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must be configured to prevent Apple Watch from terminating a session lock.

    &lt;VulnDiscussion&gt;Users must be prompted to enter their passwords when unlocking the screen saver. The screen saver acts as a session lock and ...
    Rule Medium Severity
  • SRG-OS-000028-GPOS-00009

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must retain the session lock until the user reestablishes access using established identification and authentication procedures.

    &lt;VulnDiscussion&gt;Users must be prompted to enter their passwords when unlocking the screen saver. The screen saver acts as a session lock and ...
    Rule Medium Severity
  • SRG-OS-000028-GPOS-00009

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must initiate the session lock no more than five seconds after a screen saver is started.

    &lt;VulnDiscussion&gt;A screen saver must be enabled and set to require a password to unlock. An excessive grace period impacts the ability for a s...
    Rule Medium Severity
  • SRG-OS-000029-GPOS-00010

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must initiate a session lock after a 15-minute period of inactivity.

    &lt;VulnDiscussion&gt;A screen saver must be enabled and set to require a password to unlock. The timeout should be set to 15 minutes of inactivity...
    Rule Medium Severity
  • SRG-OS-000030-GPOS-00011

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must be configured to lock the user session when a smart token is removed.

    &lt;VulnDiscussion&gt;A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the ...
    Rule Medium Severity
  • SRG-OS-000031-GPOS-00012

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must conceal, via the session lock, information previously visible on the display with a publicly viewable image.

    &lt;VulnDiscussion&gt;A default screen saver must be configured for all users, as the screen saver will act as a session time-out lock for the syst...
    Rule Low Severity
  • SRG-OS-000031-GPOS-00012

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must be configured to disable hot corners.

    &lt;VulnDiscussion&gt;Although hot corners can be used to initiate a session lock or launch useful applications, they can also be configured to dis...
    Rule Medium Severity
  • SRG-OS-000002-GPOS-00002

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must automatically remove or disable temporary and emergency user accounts after 72 hours.

    &lt;VulnDiscussion&gt;If temporary user accounts remain active when no longer needed or for an excessive period, these accounts may be targeted by ...
    Rule Medium Severity
  • SRG-OS-000355-GPOS-00143

    <GroupDescription></GroupDescription>
    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).

    &lt;VulnDiscussion&gt;Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the cor...
    Rule Medium Severity
  • SRG-OS-000191-GPOS-00080

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must utilize an ESS solution and implement all DoD required modules.

    &lt;VulnDiscussion&gt;The macOS system must employ automated mechanisms to determine the state of system components. The DoD requires the installat...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must be integrated into a directory services infrastructure.

    &lt;VulnDiscussion&gt;Distinct user account databases on each separate system cause problems with username and password policy enforcement. Most ap...
    Rule High Severity
  • SRG-OS-000329-GPOS-00128

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must enforce the limit of three consecutive invalid logon attempts by a user before the user account is locked.

    &lt;VulnDiscussion&gt;By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...
    Rule Medium Severity
  • SRG-OS-000023-GPOS-00006

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must display the Standard Mandatory DoD Notice and Consent Banner before granting remote access to the operating system.

    &lt;VulnDiscussion&gt;Display of a standardized and approved use notification before granting access to the operating system ensures privacy and se...
    Rule Medium Severity
  • SRG-OS-000023-GPOS-00006

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must display the Standard Mandatory DoD Notice and Consent Banner before granting access to the system via SSH.

    &lt;VulnDiscussion&gt;Display of a standardized and approved use notification before granting access to the operating system ensures privacy and se...
    Rule Medium Severity
  • SRG-OS-000023-GPOS-00006

    <GroupDescription></GroupDescription>
    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.

    &lt;VulnDiscussion&gt;Display of a standardized and approved use notification before granting access to the operating system ensures privacy and se...
    Rule Medium Severity
  • SRG-OS-000057-GPOS-00027

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must be configured so that log files must not contain access control lists (ACLs).

    &lt;VulnDiscussion&gt;The audit service must be configured to create log files with the correct permissions to prevent normal users from reading au...
    Rule Medium Severity
  • SRG-OS-000057-GPOS-00027

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must be configured so that log folders must not contain access control lists (ACLs).

    &lt;VulnDiscussion&gt;The audit service must be configured to create log folders with the correct permissions to prevent normal users from reading ...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must be configured with dedicated user accounts to decrypt the hard disk upon startup.

    &lt;VulnDiscussion&gt;When "FileVault" and Multifactor Authentication are configured on the operating system, a dedicated user must be configured t...
    Rule Medium Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must be configured to disable password forwarding for FileVault2.

    &lt;VulnDiscussion&gt;When "FileVault" and Multifactor Authentication are configured on the operating system, a dedicated user must be configured t...
    Rule Medium Severity
  • SRG-OS-000163-GPOS-00072

    <GroupDescription></GroupDescription>
    Group
  • The macOS system must be configured with the SSH daemon ClientAliveInterval option set to 900 or less.

    &lt;VulnDiscussion&gt;Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take c...
    Rule Medium Severity
  • SRG-OS-000163-GPOS-00072

    <GroupDescription></GroupDescription>
    Group

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