Apple macOS 11 (Big Sur) Security Technical Implementation Guide

Description

This Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DoD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: [email protected]

Details

Version / Release: V1R1

Published: 2020-11-27

Updated At: 2020-12-16 01:21:09

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Overall 0 0 0 0
Low 0 0 0 0
Medium 0 0 0 0
High 0 0 0 0
Drop CKL or SCAP (XCCDF) results here.

    Vuln Rule Version CCI Severity Title Description Status Finding Details Comments
    SV-230743r599842_rule APPL-11-000001 CCI-000056 MEDIUM 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.
    SV-230744r599842_rule APPL-11-000002 CCI-000056 MEDIUM 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.
    SV-230745r599842_rule APPL-11-000003 CCI-000056 MEDIUM 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.
    SV-230746r599842_rule APPL-11-000004 CCI-000057 MEDIUM 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 screen before stepping away from the computer. A session
    SV-230747r599842_rule APPL-11-000005 CCI-000058 MEDIUM 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 nature of the absence. The session lock is implemented a
    SV-230748r599842_rule APPL-11-000006 CCI-000060 LOW 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. The screen saver must not display any sensitive informatio
    SV-230749r599842_rule APPL-11-000007 CCI-000060 MEDIUM 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 introduces the risk that a user might forget to manually lock
    SV-230750r599842_rule APPL-11-000008 CCI-001443 MEDIUM The macOS system must be configured with Wi-Fi support software disabled. Allowing devices and users to connect to or from the system without first authenticating them allows untrusted access and can lead to a compromise or attack. Since wireless communications can be intercepted, it is necessary to use encryption to protect th
    SV-230751r599842_rule APPL-11-000011 CCI-001453 MEDIUM The macOS system must disable the SSHD service. Without confidentiality and integrity protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote access session. Remote access is access to DoD non-public information systems by an authorized user (or an informa
    SV-230752r599842_rule APPL-11-000012 CCI-000016 MEDIUM 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 termination of all temporary accounts must be set upon acc
    SV-230753r599842_rule APPL-11-000014 CCI-002046 MEDIUM 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 conducting forensic analysis and investigating system events. S
    SV-230754r599842_rule APPL-11-000015 CCI-001233 MEDIUM The macOS system must utilize an HBSS 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 operating system. For additional information, reference all appl
    SV-230755r599842_rule APPL-11-000016 CCI-000366 HIGH 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 management of users and passwords.
    SV-230756r599842_rule APPL-11-000022 CCI-002238 MEDIUM 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 account.
    SV-230757r599842_rule APPL-11-000023 CCI-000048 MEDIUM 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 laws, Executive Orders, directives, policies, regulations,
    SV-230758r599842_rule APPL-11-000024 CCI-000048 MEDIUM 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 laws, Executive Orders, directives, policies, regulations,
    SV-230759r599842_rule APPL-11-000025 CCI-000048 MEDIUM 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 laws, Executive Orders, directives, policies, regulations,
    SV-230760r599842_rule APPL-11-000030 CCI-001314 MEDIUM 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. If log files are set to be readable and writable only by r
    SV-230761r599842_rule APPL-11-000031 CCI-000162 MEDIUM 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. If log folders are set to be readable and writable only
    SV-230762r599842_rule APPL-11-000032 CCI-002143 MEDIUM 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 enforced. If a dedicated user is not configured to decrypt the
    SV-230763r599842_rule APPL-11-000033 CCI-002143 MEDIUM 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 enforced. If a dedicated user is not configured to decrypt the
    SV-230764r599842_rule APPL-11-000051 CCI-001133 MEDIUM The macOS system must be configured with the SSH daemon ClientAliveInterval option set to 900 or less. If SSH is not being used, this is Not Applicable. The SSH daemon "ClientAliveInterval" option must be set correctly. To check the idle timeout setting for SSH sessions, run the following: /usr/bin/grep ^ClientAliveInterval /etc/ssh/sshd_config If the s
    SV-230765r599842_rule APPL-11-000052 CCI-001133 MEDIUM The macOS system must be configured with the SSH daemon ClientAliveCountMax option set to 0. If SSH is not being used, this is Not Applicable. The SSH daemon "ClientAliveCountMax" option must be set correctly. To verify the SSH idle timeout will occur when the "ClientAliveCountMax" is set, run the following command: /usr/bin/grep ^ClientAliveCo
    SV-230766r599842_rule APPL-11-000053 CCI-001133 MEDIUM The macOS system must be configured with the SSH daemon LoginGraceTime set to 30 or less. If SSH is not being used, this is Not Applicable. The SSH daemon "LoginGraceTime" must be set correctly. To check the amount of time that a user can log on through SSH, run the following command: /usr/bin/grep ^LoginGraceTime /etc/ssh/sshd_config If th
    SV-230767r599842_rule APPL-11-000054 CCI-000803 MEDIUM The macOS system must implement approved ciphers to protect the confidentiality of SSH connections. Unapproved mechanisms for authentication to the cryptographic module are not verified, and therefore cannot be relied upon to provide confidentiality or integrity, resulting in the compromise of DoD data. Operating systems using encryption are required t
    SV-230768r599842_rule APPL-11-000055 CCI-000087 MEDIUM The macOS system must use only Message Authentication Codes (MACs) employing FIPS 140-2 validated cryptographic hash algorithms. Unapproved mechanisms for authentication to the cryptographic module are not verified, and therefore cannot be relied upon to provide confidentiality or integrity, resulting in the compromise of DoD data. Operating systems using encryption are required t
    SV-230769r599842_rule APPL-11-000056 CCI-000803 MEDIUM The macOS system must implement an approved Key Exchange Algorithm. Unapproved mechanisms for authentication to the cryptographic module are not verified, and therefore cannot be relied upon to provide confidentiality or integrity, resulting in the compromise of DoD data. Operating systems using encryption are required t
    SV-230770r599842_rule APPL-11-001001 CCI-000018 MEDIUM The macOS system must generate audit records for all account creations, modifications, disabling, and termination events; privileged activities or other system-level access; all kernel module load, unload, and restart actions; all program initiations; and organizationally defined events for all non-local maintenance and diagnostic sessions. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit record
    SV-230771r599842_rule APPL-11-001002 CCI-000172 MEDIUM The macOS system must monitor remote access methods and generate audit records when successful/unsuccessful attempts to access/modify privileges occur. Frequently, an attacker that successfully gains access to a system has only gained access to an account with limited privileges, such as a guest account or a service account. The attacker must attempt to change to another user account with normal or eleva
    SV-230772r599842_rule APPL-11-001003 CCI-000159 MEDIUM The macOS system must initiate session audits at system startup, using internal clocks with time stamps for audit records that meet a minimum granularity of one second and can be mapped to Coordinated Universal Time (UTC) or Greenwich Mean Time (GMT), to generate audit records containing information to establish what type of events occurred, the identity of any individual or process associated with the event, including individual identities of group account users, establish where the events occurred, sourc Without establishing what type of events occurred, when they occurred, and by whom it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. Audit record content that may be necessary to satisfy this req
    SV-230773r599842_rule APPL-11-001010 CCI-000140 MEDIUM The macOS system must shut down by default upon audit failure (unless availability is an overriding concern). The audit service should shut down the computer if it is unable to audit system events. Once audit failure occurs, user and system activity is no longer recorded and malicious activity could go undetected. Audit processing failures include software/hardwa
    SV-230774r599842_rule APPL-11-001012 CCI-000162 MEDIUM The macOS system must be configured with audit log files owned by root. The audit service must be configured to create log files with the correct ownership to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and users. If log files are set to only be readable and writable by roo
    SV-230775r599842_rule APPL-11-001013 CCI-000162 MEDIUM The macOS system must be configured with audit log folders owned by root. The audit service must be configured to create log files with the correct ownership to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and about users. If log files are set to be readable and writable only
    SV-230776r599842_rule APPL-11-001014 CCI-000162 MEDIUM The macOS system must be configured with audit log files group-owned by wheel. The audit service must be configured to create log files with the correct group ownership to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and users. If log files are set to be readable and writable only
    SV-230777r599842_rule APPL-11-001015 CCI-000162 MEDIUM The macOS system must be configured with audit log folders group-owned by wheel. The audit service must be configured to create log files with the correct group ownership to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and about users. If log files are set to be readable and writable
    SV-230778r599842_rule APPL-11-001016 CCI-000162 MEDIUM The macOS system must be configured with audit log files set to mode 440 or less permissive. 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 about users. If log files are set to be readable and writable onl
    SV-230779r599842_rule APPL-11-001017 CCI-000162 MEDIUM The macOS system must be configured with audit log folders set to mode 700 or less permissive. 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. If log folders are set to be readable and writable only
    SV-230780r599842_rule APPL-11-001020 CCI-000172 MEDIUM The macOS system must audit the enforcement actions used to restrict access associated with changes to the system. By auditing access restriction enforcement, changes to application and OS configuration files can be audited. Without auditing the enforcement of access restrictions, it will be difficult to identify attempted attacks and an audit trail will not be availa
    SV-230781r599842_rule APPL-11-001029 CCI-001849 MEDIUM The macOS system must allocate audit record storage capacity to store at least one week's worth of audit records when audit records are not immediately sent to a central audit record storage facility. The audit service must be configured to require that records are kept for seven days or longer before deletion when there is no central audit record storage facility. When "expire-after" is set to "7d", the audit service will not delete audit logs until t
    SV-230782r599842_rule APPL-11-001030 CCI-001855 MEDIUM The macOS system must provide an immediate warning to the System Administrator (SA) and Information System Security Officer (ISSO) (at a minimum) when allocated audit record storage volume reaches 75 percent of repository maximum audit record storage capacity. The audit service must be configured to require a minimum percentage of free disk space in order to run. This ensures that audit will notify the administrator that action is required to free up more disk space for audit logs. When "minfree" is set to 25
    SV-230783r599842_rule APPL-11-001031 CCI-001858 MEDIUM The macOS system must provide an immediate real-time alert to the System Administrator (SA) and Information System Security Officer (ISSO), at a minimum, of all audit failure events requiring real-time alerts. The audit service should be configured to immediately print messages to the console or email administrator users when an auditing failure occurs. It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit l
    SV-230784r599842_rule APPL-11-001044 CCI-000172 MEDIUM The macOS system must generate audit records for DoD-defined events such as successful/unsuccessful logon attempts, successful/unsuccessful direct access attempts, starting and ending time for user access, and concurrent logons to the same account from different sources. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit recor
    SV-230785r599842_rule APPL-11-001060 CCI-000186 MEDIUM The macOS system must accept and verify Personal Identity Verification (PIV) credentials, implement a local cache of revocation data to support path discovery and validation in case of the inability to access revocation information via the network, and only allow the use of DoD PKI-established certificate authorities to verify the establishment of protected sessions. The use of PIV credentials facilitates standardization and reduces the risk of unauthorized access. Without configuring a local cache of revocation data, there is the potential to allow access to user
    SV-230786r599842_rule APPL-11-001100 CCI-000770 MEDIUM The macOS system must require individuals to be authenticated with an individual authenticator prior to using a group authenticator. Administrator users must never log in directly as root. To assure individual accountability and prevent unauthorized access, logging in as root over a remote connection must be disabled. Administrators should only run commands as root after first authenti
    SV-230787r599842_rule APPL-11-002001 CCI-000381 MEDIUM The macOS system must be configured to disable SMB File Sharing unless it is required. File Sharing is usually non-essential and must be disabled if not required. Enabling any service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.
    SV-230788r599842_rule APPL-11-002003 CCI-000381 MEDIUM The macOS system must be configured to disable the Network File System (NFS) daemon unless it is required. If the system does not require access to NFS file shares or is not acting as an NFS server, support for NFS is non-essential and NFS services must be disabled. NFS is a network file system protocol supported by UNIX-like operating systems. Enabling any se
    SV-230789r599842_rule APPL-11-002004 CCI-000381 MEDIUM The macOS system must be configured to disable Location Services. To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/proto
    SV-230790r599842_rule APPL-11-002005 CCI-000381 MEDIUM The macOS system must be configured to disable Bonjour multicast advertising. To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/proto
    SV-230791r599842_rule APPL-11-002006 CCI-000381 MEDIUM The macOS system must be configured to disable the UUCP service. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230792r599842_rule APPL-11-002007 CCI-000381 MEDIUM The macOS system must be configured to disable Internet Sharing. To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/proto
    SV-230793r599842_rule APPL-11-002008 CCI-000381 MEDIUM The macOS system must be configured to disable Web Sharing. To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/proto
    SV-230794r599842_rule APPL-11-002009 CCI-000381 LOW The macOS system must be configured to disable AirDrop. To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/proto
    SV-230795r599842_rule APPL-11-002010 CCI-000381 LOW The macOS system must be configured to disable the application FaceTime. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230796r599842_rule APPL-11-002011 CCI-000381 LOW The macOS system must be configured to disable the application Messages. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230797r599842_rule APPL-11-002012 CCI-000381 LOW The macOS system must be configured to disable the iCloud Calendar services. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230798r599842_rule APPL-11-002013 CCI-000381 LOW The macOS system must be configured to disable the iCloud Reminders services. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230799r599842_rule APPL-11-002014 CCI-000381 LOW The macOS system must be configured to disable iCloud Address Book services. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230800r599842_rule APPL-11-002015 CCI-000381 LOW The macOS system must be configured to disable the Mail iCloud services. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230801r599842_rule APPL-11-002016 CCI-000381 LOW The macOS system must be configured to disable the iCloud Notes services. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230802r599842_rule APPL-11-002017 CCI-001150 MEDIUM The macOS system must cover or disable the built-in or attached camera when not in use. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230803r599842_rule APPL-11-002019 CCI-000381 MEDIUM The macOS system must be configured to disable the application Mail. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230804r599842_rule APPL-11-002020 CCI-000381 MEDIUM The macOS system must be configured to disable Siri and dictation. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230805r599842_rule APPL-11-002021 CCI-000382 MEDIUM The macOS system must be configured to disable sending diagnostic and usage data to Apple. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230806r599842_rule APPL-11-002022 CCI-000382 MEDIUM The macOS system must be configured to disable Remote Apple Events. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230807r599842_rule APPL-11-002023 CCI-000381 MEDIUM The macOS system must be configured to disable the application Calendar. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230808r599842_rule APPL-11-002031 CCI-001774 HIGH The macOS system must be configured to disable the system preference pane for iCloud. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230809r599842_rule APPL-11-002032 CCI-001774 MEDIUM The macOS system must be configured to disable the system preference pane for Internet Accounts. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230810r599842_rule APPL-11-002035 CCI-000381 MEDIUM The macOS system must be configured to disable the Cloud Setup services. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230811r599842_rule APPL-11-002036 CCI-000381 MEDIUM The macOS system must be configured to disable the Privacy Setup services. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230812r599842_rule APPL-11-002037 CCI-000381 MEDIUM The macOS system must be configured to disable the Cloud Storage Setup services. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230813r599842_rule APPL-11-002038 CCI-000197 HIGH Apple macOS must be configured to disable the tftp service. The "tftp" service must be disabled as it sends all data in a clear-text form that can be easily intercepted and read. The data needs to be protected at all times during transmission, and encryption is the standard method for protecting data in transit.
    SV-230814r599842_rule APPL-11-002039 CCI-000381 MEDIUM The macOS system must be configured to disable the Siri Setup services. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230815r599842_rule APPL-11-002040 CCI-001774 MEDIUM The macOS system must disable iCloud Keychain synchronization. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230816r599842_rule APPL-11-002041 CCI-000381 MEDIUM The macOS system must disable iCloud document synchronization. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230817r599842_rule APPL-11-002042 CCI-001774 MEDIUM The macOS system must disable iCloud bookmark synchronization. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230818r599842_rule APPL-11-002043 CCI-000381 MEDIUM The macOS system must disable iCloud photo library. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-230819r599842_rule APPL-11-002050 CCI-000366 MEDIUM The macOS system must disable the Screen Sharing feature. The Screen Sharing feature allows remote users to view or control the desktop of the current user. A malicious user can take advantage of screen sharing to gain full access to the system remotely, either with stolen credentials or by guessing the username
    SV-230820r599842_rule APPL-11-002060 CCI-000366 MEDIUM The macOS system must allow only applications downloaded from the App Store to run. Gatekeeper settings must be configured correctly to only allow the system to run applications downloaded from the Mac App Store or applications signed with a valid Apple Developer ID code. Administrator users will still have the option to override these s
    SV-230821r599842_rule APPL-11-002061 CCI-000366 MEDIUM The macOS system must be configured so that end users cannot override Gatekeeper settings. Gatekeeper must be configured with a configuration profile to prevent normal users from overriding its setting. If users are allowed to disable Gatekeeper or set it to a less restrictive setting, malware could be introduced into the system. Gatekeeper is
    SV-230822r599842_rule APPL-11-002062 CCI-002418 LOW The macOS system must be configured with Bluetooth turned off unless approved by the organization. Without protection of communications with wireless peripherals, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read, altered, or used to compromise the operating system. This requirement
    SV-230823r599842_rule APPL-11-002063 CCI-001813 HIGH The macOS system must enforce access restrictions. Failure to provide logical access restrictions associated with changes to system configuration may have significant effects on the overall security of the system. When dealing with access restrictions pertaining to change control, it should be noted that
    SV-230824r599842_rule APPL-11-002064 CCI-001749 HIGH The macOS system must have the security assessment policy subsystem enabled. Any changes to the hardware, software, and/or firmware components of the information system and/or application can potentially have significant effects on the overall security of the system. Accordingly, software defined by the organization as critical m
    SV-230825r599842_rule APPL-11-002066 CCI-000366 MEDIUM The macOS system must not allow an unattended or automatic logon to the system. Failure to restrict system access to authenticated users negatively impacts operating system security.
    SV-230826r599842_rule APPL-11-002067 CCI-001812 MEDIUM The macOS system must prohibit user installation of software without explicit privileged status. Allowing regular users to install software, without explicit privileges, creates the risk that untested or potentially malicious software will be installed on the system. Explicit privileges (escalated or administrative privileges) provide the regular use
    SV-230827r599842_rule APPL-11-002068 CCI-000366 MEDIUM The macOS system must set permissions on user home directories to prevent users from having access to read or modify another user's files. Configuring the operating system to use the most restrictive permissions possible for user home directories helps to protect against inadvertent disclosures. Satisfies: SRG-OS-000480-GPOS-00228, SRG-OS-000480-GPOS-00230
    SV-230828r599842_rule APPL-11-002069 CCI-001958 MEDIUM The macOS system must authenticate peripherals before establishing a connection. Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Peripherals include, but are not limited to, such devices as flash drives, external storage, and printers.
    SV-230829r599842_rule APPL-11-002070 CCI-000366 HIGH The macOS system must use an approved antivirus program. An approved antivirus product must be installed and configured to run. Malicious software can establish a base on individual desktops and servers. Employing an automated mechanism to detect this type of software will aid in elimination of the software fr
    SV-230830r599842_rule APPL-11-003001 CCI-000185 HIGH The macOS system must issue or obtain public key certificates under an appropriate certificate policy from an approved service provider. DoD-approved certificates must be installed to the System Keychain so they will be available to all users. For user certificates, each organization obtains certificates from an approved, shared service provider, as required by OMB policy. For federal age
    SV-230831r599842_rule APPL-11-003007 CCI-000194 MEDIUM The macOS system must enforce password complexity by requiring that at least one numeric character be used. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password
    SV-230832r599842_rule APPL-11-003008 CCI-000199 MEDIUM The macOS system must enforce a 60-day maximum password lifetime restriction. Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. One method of minimizing this risk is to use complex passwords and periodically change them. If the operating system does not limit the
    SV-230833r599842_rule APPL-11-003009 CCI-000200 MEDIUM The macOS system must prohibit password reuse for a minimum of five generations. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If the information system or application allows the user to consecutively reuse their password when that password
    SV-230834r599842_rule APPL-11-003010 CCI-000205 MEDIUM The macOS system must enforce a minimum 15-character password length. The minimum password length must be set to 15 characters. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password length is one factor of several that helps to d
    SV-230835r599842_rule APPL-11-003011 CCI-001619 MEDIUM The macOS system must enforce password complexity by requiring that at least one special character be used. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity or strength is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password com
    SV-230836r599842_rule APPL-11-003012 CCI-000366 MEDIUM The macOS system must be configured to prevent displaying password hints. Password hints leak information about passwords in use and can lead to loss of confidentiality.
    SV-230837r599842_rule APPL-11-003013 CCI-000366 MEDIUM Apple macOS must be configured with a firmware password to prevent access to single user mode and booting from alternative media. Single user mode and the boot picker, as well as numerous other tools are available on macOS through booting while holding the "Option" key down. Setting a firmware password restricts access to these tools.
    SV-230838r599842_rule APPL-11-003020 CCI-000187 HIGH The macOS system must use multifactor authentication for local access to privileged and non-privileged accounts. Without the use of multifactor authentication, the ease of access to privileged and non-privileged functions is greatly increased. Multifactor authentication requires using two or more factors to achieve authentication. Factors include: 1) something a
    SV-230839r599842_rule APPL-11-003050 CCI-000366 MEDIUM The macOS system must be configured so that the login command requires smart card authentication. Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive secur
    SV-230840r599842_rule APPL-11-003051 CCI-000366 MEDIUM The macOS system must be configured so that the su command requires smart card authentication. Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive secur
    SV-230841r599842_rule APPL-11-003052 CCI-000366 MEDIUM The macOS system must be configured so that the sudo command requires smart card authentication. Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive secur
    SV-230842r599842_rule APPL-11-004001 CCI-001314 MEDIUM The macOS system must be configured with system log files owned by root and group-owned by wheel or admin. System logs should only be readable by root or admin users. System logs frequently contain sensitive information that could be used by an attacker. Setting the correct owner mitigates this risk.
    SV-230843r599842_rule APPL-11-004002 CCI-001314 MEDIUM The macOS system must be configured with system log files set to mode 640 or less permissive. System logs should only be readable by root or admin users. System logs frequently contain sensitive information that could be used by an attacker. Setting the correct permissions mitigates this risk.
    SV-230844r599842_rule APPL-11-004021 CCI-000366 HIGH The macOS system must be configured with the sudoers file configured to authenticate users on a per -tty basis. The "sudo" command must be configured to prompt for the administrator's password at least once in each newly opened Terminal window or remote logon session, as this prevents a malicious user from taking advantage of an unlocked computer or an abandoned lo
    SV-230845r599842_rule APPL-11-005001 CCI-000169 MEDIUM The macOS system must enable System Integrity Protection. System Integrity Protection (SIP) is vital to the protection of the integrity of macOS. SIP restricts what actions can be performed by administrative users, including root, against protected parts of the operating system. SIP protects all system binaries,
    SV-230846r599842_rule APPL-11-005020 CCI-001199 MEDIUM The macOS system must implement cryptographic mechanisms to protect the confidentiality and integrity of all information at rest. Information at rest refers to the state of information when it is located on a secondary storage device (e.g., disk drive and tape drive) within an organizational information system. Mobile devices, laptops, desktops, and storage devices can be lost or st
    SV-230847r599842_rule APPL-11-005050 CCI-000366 MEDIUM The macOS Application Firewall must be enabled. Firewalls protect computers from network attacks by blocking or limiting access to open network ports. Application firewalls limit which applications are allowed to communicate over the network.