Apple macOS 15 (Sequoia) Security Technical Implementation Guide

Version

APPL-15-000001

Vuln IDs

V-268420

Rule IDs

SV-268420r1034200_rule

Apple Watches are not an approved authenticator and their use must be disabled. Disabling Apple Watches is a necessary step to ensuring that the information system retains a session lock until the user reestablishes access using an authorized identification and authentication procedures. NOTE: Unlocking the system with an Apple Watch is not an approved authenticator for U.S. Federal Government usage as it has not been verified to meet the strength requirements outlined in NIST SP 800-63.

Checks: C-72450r1034198_chk

Verify the macOS system is configured to prevent Apple Watch from terminating a session lock with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowAutoUnlock').js EOS If the result is not "false", this is a finding.

Fix: F-72351r1034199_fix

Configure the macOS system to prevent Apple Watch from terminating a session lock by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must enforce screen saver password.

AC-11 - Medium - CCI-000056 - V-268421 - SV-268421r1034203_rule

RMF Control

AC-11

Severity

M

CCI

Version

APPL-15-000002

Vuln IDs

V-268421

Rule IDs

SV-268421r1034203_rule

Users must authenticate when unlocking the screen saver. The screen saver acts as a session lock and prevents unauthorized users from accessing the current user's account.

Checks: C-72451r1034201_chk

Verify the macOS system is configured to prompt users to enter a password to unlock the screen saver with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.screensaver')\ .objectForKey('askForPassword').js EOS If the result is not "true", this is a finding.

Fix: F-72352r1034202_fix

Configure the macOS system to prompt users to enter a password to unlock the screen saver by installing the "com.apple.screensaver" configuration profile.

b

The macOS system must enforce session lock no more than five seconds after screen saver is started.

AC-11 - Medium - CCI-000056 - V-268422 - SV-268422r1131177_rule

RMF Control

AC-11

Severity

M

CCI

Version

APPL-15-000003

Vuln IDs

V-268422

Rule IDs

SV-268422r1131177_rule

A screen saver must be enabled and the system must be configured to require a password to unlock once the screen saver has been on for a maximum of five seconds. An unattended system with an excessive grace period is vulnerable to a malicious user.

Checks: C-72452r1131176_chk

Verify the macOS system is configured to initiate a session lock within five seconds of the screen saver starting with the following command: /usr/bin/osascript -l JavaScript << EOS function run() { let delay = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.screensaver')\ .objectForKey('askForPasswordDelay')) if ( delay <= 5 ) { return("true") } else { return("false") } } EOS If the result is not "true", this is a finding.

Fix: F-72353r1034205_fix

Configure the macOS system to initiate a session lock within five seconds of the screen saver starting by installing the "com.apple.screensaver" configuration profile.

b

The macOS system must configure user session lock when a smart token is removed.

AC-11 - Medium - CCI-000057 - V-268423 - SV-268423r1034209_rule

RMF Control

AC-11

Severity

M

CCI

CCI-000057

Version

APPL-15-000005

Vuln IDs

V-268423

Rule IDs

SV-268423r1034209_rule

The screen lock must be configured to initiate automatically when the smart token is removed from the system. Session locks are temporary actions taken when users stop work and move away from the immediate vicinity of the information system but do not want to log out because of the temporary nature of their absences. While a session lock is not an acceptable substitute for logging out of an information system for longer periods of time, they prevent a malicious user from accessing the information system when a user has removed their smart token. [IMPORTANT] ==== Information system security officers (ISSOs) may make the risk-based decision not to enforce a session lock when a smart token is removed to maintain necessary workflow capabilities, but they are advised to first fully weigh the potential risks posed to their organization. ====

Checks: C-72453r1034207_chk

Verify the macOS system is configured to lock the user session when a smart token is removed with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.security.smartcard')\ .objectForKey('tokenRemovalAction').js EOS If the result is not "1", this is a finding.

Fix: F-72354r1034208_fix

Configure the macOS system to lock the user session when a smart token is removed by installing the "com.apple.security.smartcard" configuration profile. NOTE: To ensure continued access to the operating system, consult the supplemental guidance provided with the STIG before applying the configuration profile.

b

The macOS system must disable hot corners.

AC-11 - Medium - CCI-000060 - V-268424 - SV-268424r1034212_rule

RMF Control

AC-11

Severity

M

CCI

CCI-000060

Version

APPL-15-000007

Vuln IDs

V-268424

Rule IDs

SV-268424r1034212_rule

Hot corners must be disabled. The information system conceals, via the session lock, information previously visible on the display with a publicly viewable image. Although hot corners can be used to initiate a session lock or to 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 the screen before stepping away from the computer.

Checks: C-72454r1034210_chk

Verify the macOS system is configured to disable hot corners with the following command: /usr/bin/profiles -P -o stdout | /usr/bin/grep -Ec '"wvous-bl-corner" = 0|"wvous-br-corner" = 0|"wvous-tl-corner" = 0|"wvous-tr-corner" = 0' If the result is not "4", this is a finding.

Fix: F-72355r1034211_fix

Configure the macOS system to disable hot corners by installing the "com.apple.ManagedClient.preferences" configuration profile.

b

The macOS system must prevent AdminHostInfo from being available at LoginWindow.

AC-11 - Medium - CCI-000060 - V-268425 - SV-268425r1034215_rule

RMF Control

AC-11

Severity

M

CCI

CCI-000060

Version

APPL-15-000009

Vuln IDs

V-268425

Rule IDs

SV-268425r1034215_rule

The system must be configured to not display sensitive information at the LoginWindow. The key AdminHostInfo, when configured, will allow the HostName, IP Address, and operating system version and build to be displayed.

Checks: C-72455r1034213_chk

Verify the macOS system is configured to prevent AdminHostInfo from being available at LoginWindow with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.loginwindow')\ .objectIsForcedForKey('AdminHostInfo') EOS If the result is not "false", this is a finding.

Fix: F-72356r1034214_fix

Configure the macOS system to prevent AdminHostInfo from being available at LoginWindow by installing the "com.apple.loginwindow" configuration profile.

b

The macOS system must automatically remove or disable temporary or emergency user accounts within 72 hours.

AC-2 - Medium - CCI-000016 - V-268426 - SV-268426r1034218_rule

RMF Control

AC-2

Severity

M

CCI

CCI-000016

Version

APPL-15-000012

Vuln IDs

V-268426

Rule IDs

SV-268426r1034218_rule

The macOS system can be configured to set an automated termination for 72 hours or less for all temporary or emergency accounts upon account creation. Emergency administrator accounts are privileged accounts established in response to crisis situations where the need for rapid account activation is required. Therefore, emergency account activation may bypass normal account authorization processes. If these accounts are disabled, system maintenance during emergencies may not be possible, thus adversely affecting system availability. Although the ability to create and use emergency administrator accounts is necessary for performing system maintenance during emergencies, these accounts present vulnerabilities to the system if they are not disabled and removed when they are no longer needed. Configuring the macOS to automatically remove or disable emergency accounts within 72 hours of creation mitigates the risks posed if one were to be created and accidentally left active once the crisis is resolved. Emergency administrator accounts are different from infrequently used accounts (i.e., local login accounts used by system administrators when network or normal login is not available). Infrequently used accounts also remain available and are not subject to automatic termination dates. However, an emergency administrator account is normally a different account created for use by vendors or system maintainers. To address access requirements, many operating systems can be integrated with enterprise-level authentication/access mechanisms that meet or exceed access control policy requirements. If temporary or emergency 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 or emergency accounts must be set to 72 hours (or less) when the temporary or emergency account is created. If no policy is enforced by a directory service, a password policy can be set with the "pwpolicy" utility. The variable names may vary depending on how the policy was set. If no temporary or emergency accounts are defined on the system, this is not applicable. Satisfies: SRG-OS-000002-GPOS-00002, SRG-OS-000123-GPOS-00064

Checks: C-72456r1034216_chk

Verify that a password policy is enforced by a directory service by asking the system administrator (SA) or information system security officer (ISSO). If no policy is enforced by a directory service, a password policy can be set with the "pwpolicy" utility. The variable names may vary depending on how the policy was set. If no temporary or emergency accounts are defined on the system, this is not applicable. To check if the password policy is configured to disable a temporary or emergency account after 72 hours, run the following command to output the password policy to the screen, substituting the correct user name in place of username: /usr/bin/pwpolicy -u username getaccountpolicies | tail -n +2 If there is no output, and password policy is not controlled by a directory service, this is a finding. Otherwise, look for the line "<key>policyCategoryAuthentication</key>". In the array that follows, there should be a <dict> section that contains a check <string> that allows users to log in if "policyAttributeCurrentTime" is less than the result of adding "policyAttributeCreationTime" to 72 hours (259299 seconds). The check might use a variable defined in its "policyParameters" section. If the check does not exist or if the check adds too great an amount of time to "policyAttributeCreationTime", this is a finding.

Fix: F-72357r1034217_fix

This setting may be enforced using local policy or by a directory service. To set local policy to disable a temporary or emergency user, create a plain text file containing the following: <dict> <key>policyCategoryAuthentication</key> <array> <dict> <key>policyContent</key> <string>policyAttributeCurrentTime < policyAttributeCreationTime+259299</string> <key>policyIdentifier</key> <string>Disable Tmp Accounts </string> </dict> </array> </dict> After saving the file and exiting to the command prompt, run the following command to load the new policy file, substituting the correct user name in place of "username" and the path to the file in place of "/path/to/file". /usr/bin/pwpolicy -u username setaccountpolicies /path/to/file

b

The macOS system must enforce time synchronization.

Medium - CCI-004923 - V-268427 - SV-268427r1131179_rule

RMF Control

Severity

M

CCI

CCI-004923

Version

APPL-15-000014

Vuln IDs

V-268427

Rule IDs

SV-268427r1131179_rule

Time synchronization must be enforced on all networked systems. This rule ensures the uniformity of time stamps for information systems with multiple system clocks and systems connected over a network. Satisfies: SRG-OS-000355-GPOS-00143, SRG-OS-000356-GPOS-00144, SRG-OS-000785-GPOS-00250

Checks: C-72457r1034219_chk

Verify the macOS system is configured to enforce time synchronization with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.timed')\ .objectForKey('TMAutomaticTimeOnlyEnabled').js EOS If the result is not "true", this is a finding.

Fix: F-72358r1131178_fix

Configure the macOS system to enforce time synchronization by installing the "com.apple.ManagedClient.preferences" configuration profile.

b

The macOS system must limit consecutive failed login attempts to three.

AC-7 - Medium - CCI-000044 - V-268428 - SV-268428r1131182_rule

RMF Control

AC-7

Severity

M

CCI

CCI-000044

Version

APPL-15-000022

Vuln IDs

V-268428

Rule IDs

SV-268428r1131182_rule

The macOS must be configured to limit the number of failed login attempts to a maximum of three. When the maximum number of failed attempts is reached, the account must be locked for a period of time. This rule protects against malicious users attempting to gain access to the system via brute-force hacking methods. Satisfies: SRG-OS-000021-GPOS-00005, SRG-OS-000329-GPOS-00128

Checks: C-72458r1131180_chk

Verify the macOS system is configured to limit consecutive failed login attempts to three with the following command: /usr/bin/pwpolicy -getaccountpolicies 2> /dev/null | /usr/bin/tail +2 | /usr/bin/xmllint --xpath '//dict/key[text()="policyAttributeMaximumFailedAuthentications"]/following-sibling::integer[1]/text()' - | /usr/bin/awk '{ if ($1 <= 3) {print "yes"} else {print "no"}}' | /usr/bin/uniq If the result is not "yes", this is a finding.

Fix: F-72359r1131181_fix

Configure the macOS system to limit consecutive failed login attempts to three by installing the "com.apple.mobiledevice.passwordpolicy" configuration profile.

b

The macOS system must display a policy banner at remote login.

AC-8 - Medium - CCI-000048 - V-268429 - SV-268429r1034227_rule

RMF Control

AC-8

Severity

M

CCI

CCI-000048

Version

APPL-15-000023

Vuln IDs

V-268429

Rule IDs

SV-268429r1034227_rule

Remote login service must be configured to display a policy banner at login. Displaying a standardized and approved use notification before granting access to the operating system ensures that users are provided with privacy and security notification verbiage that is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. System use notifications are required only for access via login interfaces with human users and are not required when such human interfaces do not exist. Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000024-GPOS-00007

Checks: C-72459r1034225_chk

Verify the macOS system is configured to display the Standard Mandatory DOD Notice and Consent Banner before granting remote access to the operating system. Verify the operating system has the correct text listed in the "/etc/banner" file with the following command: /usr/bin/more /etc/banner The command must return the following text: "You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose. -This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy. -Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details." If the operating system does not display a login banner before granting remote access or the banner does not match the Standard Mandatory DOD Notice and Consent Banner, this is a finding. If the text in the "/etc/banner" file does not match the Standard Mandatory DOD Notice and Consent Banner, this is a finding.

Fix: F-72360r1034226_fix

Configure the macOS system to display the Standard Mandatory DOD Notice and Consent Banner before granting remote access to the operating system by creating a text file containing the required DOD text. Name the file "banner" and place it in "/etc/".

b

The macOS system must display the Standard Mandatory DOD Notice and Consent Banner at the login window.

AC-8 - Medium - CCI-000048 - V-268431 - SV-268431r1131186_rule

RMF Control

AC-8

Severity

M

CCI

CCI-000048

Version

APPL-15-000025

Vuln IDs

V-268431

Rule IDs

SV-268431r1131186_rule

Displaying a standardized and approved use notification before granting access to the operating system ensures that users are provided with privacy and security notification verbiage that is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. System use notifications are required only for access via login interfaces with human users and are not required when such human interfaces do not exist. The policy banner will show if a "PolicyBanner.rtf" or "PolicyBanner.rtfd" exists in the "/Library/Security" folder. The banner must be formatted in accordance with DTM-08-060. Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000024-GPOS-00007, SRG-OS-000228-GPOS-00088

Checks: C-72461r1131185_chk

Verify the macOS system is configured to display a policy banner with the following command: /bin/ls -ld /Library/Security/PolicyBanner.rtf* | /usr/bin/wc -l | /usr/bin/tr -d ' ' If the command does not return "1", this is a finding. The banner text of the document must read: "You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG authorized purpose. -This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy. -Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details." If the text is not worded exactly this way, this is a finding.

Fix: F-72362r1034232_fix

Configure the macOS system to display a policy banner by creating an RTF file containing the required text. Name the file "PolicyBanner.rtfd" and place it in "/Library/Security/". Update the permissions of the "/Library/Security/PolicyBanner.rtfd" file with the following command: /usr/bin/sudo /bin/chmod 644 /Library/Security/PolicyBanner.rtfd

b

The macOS system must configure audit log files to not contain access control lists (ACLs).

AU-9 - Medium - CCI-000162 - V-268432 - SV-268432r1034236_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-000030

Vuln IDs

V-268432

Rule IDs

SV-268432r1034236_rule

The audit log files must not contain ACLs. This rule ensures that audit information and audit files are configured to be readable and writable only by system administrators, thereby preventing unauthorized access, modification, and deletion of files. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099

Checks: C-72462r1034234_chk

Verify the macOS system is configured without ACLs applied to log files with the following command: /bin/ls -le $(/usr/bin/grep '^dir' /etc/security/audit_control | /usr/bin/awk -F: '{print $2}') | /usr/bin/awk '{print $1}' | /usr/bin/grep -c ":" If the result is not "0", this is a finding.

Fix: F-72363r1034235_fix

Configure the macOS system without ACLs applied to log files with the following command: /bin/chmod -RN /var/audit

b

The macOS system must configure the audit log folder to not contain access control lists (ACLs).

AU-9 - Medium - CCI-000162 - V-268433 - SV-268433r1034239_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-000031

Vuln IDs

V-268433

Rule IDs

SV-268433r1034239_rule

The audit log folder must not contain ACLs. Audit logs contain sensitive data about the system and users. This rule ensures that the audit service is configured to create log folders that are readable and writable only by system administrators to prevent normal users from reading audit logs. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099

Checks: C-72463r1034237_chk

Verify the macOS system is configured without ACLs applied to log folders with the following command: /bin/ls -lde /var/audit | /usr/bin/awk '{print $1}' | /usr/bin/grep -c ":" If the result is not "0", this is a finding.

Fix: F-72364r1034238_fix

Configure the macOS system without ACLs applied to log folders with the following command: /bin/chmod -N /var/audit

b

The macOS system must disable FileVault automatic login.

AC-3 - Medium - CCI-000213 - V-268434 - SV-268434r1117265_rule

RMF Control

AC-3

Severity

M

CCI

Version

APPL-15-000033

Vuln IDs

V-268434

Rule IDs

SV-268434r1117265_rule

If FileVault is enabled, automatic login must be disabled so that both FileVault and login window authentication are required. The default behavior of macOS when FileVault is enabled is to automatically log in to the computer once successfully passing FileVault credentials. NOTE: DisableFDEAutoLogin does not have to be set on Apple Silicon-based macOS systems that are smart card enforced, as smart cards are available at preboot.

Checks: C-72464r1034240_chk

Verify the macOS system is configured to disable FileVault automatic login with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.loginwindow')\ .objectForKey('DisableFDEAutoLogin').js EOS If the result is not "true", this is a finding.

Fix: F-72365r1034241_fix

Configure the macOS system to disable FileVault automatic login by installing the "com.apple.loginwindow" configuration profile. NOTE: To ensure continued access to the operating system, consult the supplemental guidance provided with the STIG before applying the configuration profile.

b

The macOS system must configure SSHD ClientAliveInterval to 900.

SC-10 - Medium - CCI-001133 - V-268435 - SV-268435r1131188_rule

RMF Control

SC-10

Severity

M

CCI

Version

APPL-15-000051

Vuln IDs

V-268435

Rule IDs

SV-268435r1131188_rule

If SSHD is enabled, it must be configured with the Client Alive Interval set to 900. This sets a timeout interval in seconds, after which if no data has been received from the client, sshd(8) will send a message through the encrypted channel to request a response from the client. This setting works in conjunction with ClientAliveCountMax to determine the termination of the connection after the threshold has been reached. Note: This setting is not intended to manage idle user sessions where there is no input from the client. Its purpose is to look for interruptions in network connectivity and force the session to terminate after the connection appears to be broken. Note: /etc/ssh/sshd_config will be automatically modified to its original state following any update or major upgrade to the operating system.

Checks: C-72465r1034243_chk

Verify the macOS system is configured to set the SSHD ClientAliveInterval to 900 with the following command: /usr/sbin/sshd -G | /usr/bin/awk '/clientaliveinterval/{print $2}' If the result is not "900", this is a finding.

Fix: F-72366r1131187_fix

Configure the macOS system to set the SSHD ClientAliveInterval to 900 with the following command: include_dir=$(/usr/bin/awk '/^Include/ {print $2}' /etc/ssh/sshd_config | /usr/bin/tr -d '*') if [[ -z $include_dir ]]; then /usr/bin/sed -i.bk "1s/.*/Include \/etc\/ssh\/sshd_config.d\/\*/" /etc/ssh/sshd_config fi /usr/bin/grep -qxF 'clientaliveinterval 900' "${include_dir}01-mscp-sshd.conf" 2>/dev/null || echo "clientaliveinterval 900" >> "${include_dir}01-mscp-sshd.conf" for file in $(ls ${include_dir}); do if [[ "$file" == "100-macos.conf" ]]; then continue fi if [[ "$file" == "01-mscp-sshd.conf" ]]; then break fi /bin/mv ${include_dir}${file} ${include_dir}20-${file} done

b

The macOS system must configure SSHD ClientAliveCountMax to 1.

SC-10 - Medium - CCI-001133 - V-268436 - SV-268436r1034780_rule

RMF Control

SC-10

Severity

M

CCI

Version

APPL-15-000052

Vuln IDs

V-268436

Rule IDs

SV-268436r1034780_rule

If SSHD is enabled, it must be configured with the Client Alive Maximum Count set to 1. This will set the number of client alive messages that may be sent without the SSH server receiving any messages back from the client. If this threshold is reached while client alive messages are being sent, the SSH server will disconnect the client, terminating the session. The client alive messages are sent through the encrypted channel and therefore cannot be spoofed. The client alive mechanism is valuable when the client or server depends on knowing when a connection has become unresponsive. NOTE: This setting is not intended to manage idle user sessions where there is no input from the client. Its purpose is to monitor for interruptions in network connectivity and force the session to terminate after the connection appears to be broken. NOTE: /etc/ssh/sshd_config will be automatically modified to its original state following any update or major upgrade to the operating system.

Checks: C-72466r1034246_chk

Verify the macOS system is configured to set the SSHD ClientAliveCountMax to 1 with the following command: /usr/sbin/sshd -G | /usr/bin/awk '/clientalivecountmax/{print $2}' If the result is not "1", this is a finding.

Fix: F-72367r1034247_fix

Configure the macOS system to set the SSHD ClientAliveCountMax to 1 with the following command: include_dir=$(/usr/bin/awk '/^Include/ {print $2}' /etc/ssh/sshd_config | /usr/bin/tr -d '*') if [[ -z $include_dir ]]; then /usr/bin/sed -i.bk "1s/.*/Include \/etc\/ssh\/sshd_config.d\/\*/" /etc/ssh/sshd_config fi /usr/bin/grep -qxF 'clientalivecountmax 1' "${include_dir}01-mscp-sshd.conf" 2>/dev/null || echo "clientalivecountmax 1" >> "${include_dir}01-mscp-sshd.conf" for file in $(ls ${include_dir}); do if [[ "$file" == "100-macos.conf" ]]; then continue fi if [[ "$file" == "01-mscp-sshd.conf" ]]; then break fi /bin/mv ${include_dir}${file} ${include_dir}20-${file} done

b

The macOS system must set login grace time to 30.

SC-10 - Medium - CCI-001133 - V-268437 - SV-268437r1034251_rule

RMF Control

SC-10

Severity

M

CCI

Version

APPL-15-000053

Vuln IDs

V-268437

Rule IDs

SV-268437r1034251_rule

If SSHD is enabled, it must be configured to wait only 30 seconds before timing out login attempts. NOTE: /etc/ssh/sshd_config will be automatically modified to its original state following any update or major upgrade to the operating system.

Checks: C-72467r1034249_chk

Verify the macOS system is configured to set Login Grace Time to 30 with the following command: /usr/sbin/sshd -G | /usr/bin/awk '/logingracetime/{print $2}' If the result is not "30", this is a finding.

Fix: F-72368r1034250_fix

Configure the macOS system to set Login Grace Time to 30 with the following command: include_dir=$(/usr/bin/awk '/^Include/ {print $2}' /etc/ssh/sshd_config | /usr/bin/tr -d '*') if [[ -z $include_dir ]]; then /usr/bin/sed -i.bk "1s/.*/Include \/etc\/ssh\/sshd_config.d\/\*/" /etc/ssh/sshd_config fi /usr/bin/grep -qxF 'logingracetime 30' "${include_dir}01-mscp-sshd.conf" 2>/dev/null || echo "logingracetime 30" >> "${include_dir}01-mscp-sshd.conf" for file in $(ls ${include_dir}); do if [[ "$file" == "100-macos.conf" ]]; then continue fi if [[ "$file" == "01-mscp-sshd.conf" ]]; then break fi /bin/mv ${include_dir}${file} ${include_dir}20-${file} done

c

The macOS system must limit SSHD to FIPS-compliant connections.

AC-17 - High - CCI-000068 - V-268438 - SV-268438r1131191_rule

RMF Control

AC-17

Severity

H

CCI

CCI-000068

Version

APPL-15-000054

Vuln IDs

V-268438

Rule IDs

SV-268438r1131191_rule

If SSHD is enabled, it must be configured to limit the Ciphers, HostbasedAcceptedAlgorithms, HostKeyAlgorithms, KexAlgorithms, MACs, PubkeyAcceptedAlgorithms, CASignatureAlgorithms to algorithms that are FIPS-140 validated. FIPS 140-2/140-3 is the current standard for validating that mechanisms used to access cryptographic modules use authentication that meets federal requirements. Operating systems using encryption must use FIPS-validated mechanisms for authenticating to cryptographic modules. Note: For more information on FIPS compliance with the version of SSHD included in the macOS, the manual page apple_ssh_and_fips has additional information. Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000120-GPOS-00061, SRG-OS-000250-GPOS-00093, SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174, SRG-OS-000396-GPOS-00176, SRG-OS-000424-GPOS-00188, SRG-OS-000478-GPOS-00223

Checks: C-72468r1131189_chk

Verify the macOS system is configured to limit SSHD to FIPS-compliant connections with the following command: fips_sshd_config=("Ciphers aes128-gcm@openssh.com" "HostbasedAcceptedAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com" "HostKeyAlgorithms ecdsa-sha2-nistp256-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp256,sk-ecdsa-sha2-nistp256@openssh.com" "KexAlgorithms ecdh-sha2-nistp256" "MACs hmac-sha2-256-etm@openssh.com,hmac-sha2-256" "PubkeyAcceptedAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com" "CASignatureAlgorithms ecdsa-sha2-nistp256,sk-ecdsa-sha2-nistp256@openssh.com") total=0 for config in $fips_sshd_config; do total=$(expr $(/usr/sbin/sshd -G | /usr/bin/grep -i -c "$config") + $total) done echo $total If the result is not "7", this is a finding.

Fix: F-72369r1131190_fix

Configure the macOS system to limit SSHD to FIPS-compliant connections with the following command: if [ -f /etc/ssh/crypto.conf ] && /usr/bin/grep -q "Include /etc/ssh/crypto.conf" /etc/ssh/sshd_config.d/100-macos.conf 2>/bin/null; then /bin/ln -fs /etc/ssh/crypto/fips.conf /etc/ssh/crypto.conf fi include_dir=$(/usr/bin/awk '/^Include/ {print $2}' /etc/ssh/sshd_config | /usr/bin/tr -d '*') if [[ -z $include_dir ]]; then /usr/bin/sed -i.bk "1s/.*/Include \/etc\/ssh\/sshd_config.d\/\*/" /etc/ssh/sshd_config fi fips_sshd_config=("Ciphers aes128-gcm@openssh.com" "HostbasedAcceptedAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com" "HostKeyAlgorithms ecdsa-sha2-nistp256-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp256,sk-ecdsa-sha2-nistp256@openssh.com" "KexAlgorithms ecdh-sha2-nistp256" "MACs hmac-sha2-256-etm@openssh.com,hmac-sha2-256" "PubkeyAcceptedAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com" "CASignatureAlgorithms ecdsa-sha2-nistp256,sk-ecdsa-sha2-nistp256@openssh.com") sshd_config=$(/usr/sbin/sshd -G) for config in $fips_sshd_config; do if ! echo $sshd_config | /usr/bin/grep -q -i "$config" 2>/dev/null; then /usr/bin/grep -qxF "$config" "${include_dir}01-mscp-sshd.conf" 2>/dev/null || echo "$config" >> "${include_dir}01-mscp-sshd.conf" fi done for file in $(ls ${include_dir}); do if [[ "$file" == "100-macos.conf" ]]; then continue fi if [[ "$file" == "01-mscp-sshd.conf" ]]; then break fi /bin/mv ${include_dir}${file} ${include_dir}20-${file} done

c

The macOS system must limit SSH to FIPS-compliant connections.

AC-17 - High - CCI-000068 - V-268439 - SV-268439r1131194_rule

RMF Control

AC-17

Severity

H

CCI

CCI-000068

Version

APPL-15-000057

Vuln IDs

V-268439

Rule IDs

SV-268439r1131194_rule

SSH must be configured to limit the Ciphers, HostbasedAcceptedAlgorithms, HostKeyAlgorithms, KexAlgorithms, MACs, PubkeyAcceptedAlgorithms, CASignatureAlgorithms to algorithms that are FIPS-140 validated. FIPS 140-3 is the current standard for validating that mechanisms used to access cryptographic modules use authentication that meets federal requirements. Operating systems using encryption must use FIPS-validated mechanisms for authenticating to cryptographic modules. Note: For more information on FIPS compliance with the version of SSH included in the macOS, the manual page apple_ssh_and_fips has additional information. Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000120-GPOS-00061, SRG-OS-000250-GPOS-00093, SRG-OS-000396-GPOS-00176, SRG-OS-000424-GPOS-00188, SRG-OS-000478-GPOS-00223

Checks: C-72469r1131192_chk

Verify the macOS system is configured to limit SSH to FIPS-compliant connections with the following command: fips_ssh_config=("Ciphers aes128-gcm@openssh.com" "HostbasedAcceptedAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com" "HostKeyAlgorithms ecdsa-sha2-nistp256-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp256,sk-ecdsa-sha2-nistp256@openssh.com" "KexAlgorithms ecdh-sha2-nistp256" "MACs hmac-sha2-256-etm@openssh.com,hmac-sha2-256" "PubkeyAcceptedAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com" "CASignatureAlgorithms ecdsa-sha2-nistp256,sk-ecdsa-sha2-nistp256@openssh.com") total=0 ret="pass" for config in $fips_ssh_config; do if [[ "$ret" == "fail" ]]; then break fi for u in $(/usr/bin/dscl . list /users shell | /usr/bin/egrep -v '(^_)|(root)|(/usr/bin/false)' | /usr/bin/awk '{print $1}'); do sshCheck=$(/usr/bin/sudo -u $u /usr/bin/ssh -G . | /usr/bin/grep -ci "$config") if [[ "$sshCheck" == "0" ]]; then ret="fail" break fi done done echo $ret If the result is not "pass", this is a finding.

Fix: F-72370r1131193_fix

Configure the macOS system to limit SSH to FIPS-compliant connections with the following command: if [ -f /etc/ssh/crypto.conf ] && /usr/bin/grep -q "Include /etc/ssh/crypto.conf" /etc/ssh/ssh_config.d/100-macos.conf 2>/dev/null; then /bin/ln -fs /etc/ssh/crypto/fips.conf /etc/ssh/crypto.conf fi include_dir=$(/usr/bin/awk '/^Include/ {print $2}' /etc/ssh/ssh_config | /usr/bin/tr -d '*') fips_ssh_config=("Ciphers aes128-gcm@openssh.com" "HostbasedAcceptedAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com" "HostKeyAlgorithms ecdsa-sha2-nistp256-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp256,sk-ecdsa-sha2-nistp256@openssh.com" "KexAlgorithms ecdh-sha2-nistp256" "MACs hmac-sha2-256-etm@openssh.com,hmac-sha2-256" "PubkeyAcceptedAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com" "CASignatureAlgorithms ecdsa-sha2-nistp256,sk-ecdsa-sha2-nistp256@openssh.com") for ssh_config in $fips_ssh_config; do ssh_setting=$(echo $ssh_config | /usr/bin/cut -d " " -f1) /usr/bin/grep -qEi "^$ssh_setting" "${include_dir}01-mscp-ssh.conf" && /usr/bin/sed -i "" "s/^$ssh_setting.*/${ssh_config}/" "${include_dir}01-mscp-ssh.conf" || echo "$ssh_config" >> "${include_dir}01-mscp-ssh.conf" for u in $(/usr/bin/dscl . list /users shell | /usr/bin/egrep -v '(^_)|(root)|(/usr/bin/false)' | /usr/bin/awk '{print $1}'); do config=$(/usr/bin/sudo -u $u /usr/bin/ssh -Gv . 2>&1) configfiles=$(echo "$config" | /usr/bin/awk '/Reading configuration data/ {print $NF}'| /usr/bin/tr -d '\r') configarray=( ${(f)configfiles} ) if ! echo $config | /usr/bin/grep -q -i "$ssh_config" ; then for c in $configarray; do if [[ "$c" == "/etc/ssh/crypto.conf" ]]; then continue fi /usr/bin/sudo -u $u /usr/bin/grep -qEi "^$ssh_setting" "$c" && /usr/bin/sed -i "" "s/^$ssh_setting.*/${ssh_config}/I" "$c" if [[ "$c" =~ ".ssh/config" ]]; then if /usr/bin/grep -qEi "$ssh_setting" "$c" 2> /dev/null; then old_file=$(cat ~$u/.ssh/config) echo "$ssh_config" > ~$u/.ssh/config echo "$old_file" >> ~$u/.ssh/config fi fi done fi done done

b

The macOS system must set account lockout time to 15 minutes.

AC-7 - Medium - CCI-000044 - V-268440 - SV-268440r1131197_rule

RMF Control

AC-7

Severity

M

CCI

CCI-000044

Version

APPL-15-000060

Vuln IDs

V-268440

Rule IDs

SV-268440r1131197_rule

The macOS system must be configured to enforce a lockout time of at least 15 minutes when the maximum number of failed login attempts is reached. This rule protects against malicious users attempting to gain access to the system via brute-force hacking methods. Satisfies: SRG-OS-000021-GPOS-00005, SRG-OS-000329-GPOS-00128

Checks: C-72470r1131195_chk

Verify the macOS system is configured to set account lockout time to 15 minutes with the following command: /usr/bin/pwpolicy -getaccountpolicies 2> /dev/null | /usr/bin/tail +2 | /usr/bin/xmllint --xpath '//dict/key[text()="autoEnableInSeconds"]/following-sibling::integer[1]/text()' - | /usr/bin/awk '{ if ($1/60 >= 15 ) {print "yes"} else {print "no"}}' | /usr/bin/uniq If the result is not "yes", this is a finding.

Fix: F-72371r1131196_fix

Configure the macOS system to set account lockout time to 15 minutes by installing the "com.apple.mobiledevice.passwordpolicy" configuration profile.

b

The macOS system must enforce screen saver timeout.

AC-11 - Medium - CCI-000057 - V-268441 - SV-268441r1131199_rule

RMF Control

AC-11

Severity

M

CCI

CCI-000057

Version

APPL-15-000070

Vuln IDs

V-268441

Rule IDs

SV-268441r1131199_rule

The screen saver timeout must be set to 900 seconds or a shorter length of time. This rule ensures that a full session lock is triggered within no more than 900 seconds of inactivity.

Checks: C-72471r1131198_chk

Verify the macOS system is configured to initiate the screen saver timeout after 15 minutes of inactivity with the following command: /usr/bin/osascript -l JavaScript << EOS function run() { let timeout = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.screensaver')\ .objectForKey('idleTime')) if ( timeout <= 900 ) { return("true") } else { return("false") } } EOS If the result is not "true", this is a finding.

Fix: F-72372r1034262_fix

Configure the macOS system to initiate the screen saver after 15 minutes of inactivity by installing the "com.apple.screensaver" configuration profile.

b

The macOS system must disable login to other users' active and locked sessions.

IA-2 - Medium - CCI-000764 - V-268442 - SV-268442r1131200_rule

RMF Control

IA-2

Severity

M

CCI

Version

APPL-15-000090

Vuln IDs

V-268442

Rule IDs

SV-268442r1131200_rule

The ability to log in to another user's active or locked session must be disabled. WARNING: This rule may cause issues when platformSSO is configured. macOS has a privilege that can be granted to any user that will allow that user to unlock active users' sessions. Disabling the administrator's and/or user's ability to log in to another user's active and locked session prevents unauthorized people from viewing potentially sensitive and/or personal information. Note: Configuring this setting will change the user experience and disable TouchID from unlocking the screen saver. To restore the user experience and allow TouchID to unlock the screen saver, run "/usr/bin/sudo /usr/bin/defaults write /Library/Preferences/com.apple.loginwindow screenUnlockMode -int 1". This setting can also be deployed with a configuration profile. Satisfies: SRG-OS-000104-GPOS-00051, SRG-OS-000109-GPOS-00056

Checks: C-72472r1034264_chk

Verify the macOS system is configured to disable login to other users' active and locked sessions with the following command: /usr/bin/security authorizationdb read system.login.screensaver 2>&1 | /usr/bin/grep -c '<string>authenticate-session-owner</string>' If the result is not "1", this is a finding.

Fix: F-72373r1034265_fix

Configure the macOS system to disable login to other users' active and locked sessions with the following command: /usr/bin/security authorizationdb write system.login.screensaver "authenticate-session-owner"

b

The macOS system must disable root login.

IA-2 - Medium - CCI-000764 - V-268443 - SV-268443r1034269_rule

RMF Control

IA-2

Severity

M

CCI

Version

APPL-15-000100

Vuln IDs

V-268443

Rule IDs

SV-268443r1034269_rule

To assure individual accountability and prevent unauthorized access, logging in as root at the login window must be disabled. The macOS system must require individuals to be authenticated with an individual authenticator prior to using a group authenticator, and administrator users must never log in directly as root. Satisfies: SRG-OS-000104-GPOS-00051, SRG-OS-000109-GPOS-00056, SRG-OS-000364-GPOS-00151

Checks: C-72473r1034267_chk

Verify the macOS system is configured to disable root login with the following command: /usr/bin/dscl . -read /Users/root UserShell 2>&1 | /usr/bin/grep -c "/usr/bin/false" If the result is not "1", this is a finding.

Fix: F-72374r1034268_fix

Configure the macOS system to disable root login with the following command: /usr/bin/dscl . -create /Users/root UserShell /usr/bin/false

b

The macOS system must configure the SSH ServerAliveInterval to 900.

SC-10 - Medium - CCI-001133 - V-268444 - SV-268444r1131203_rule

RMF Control

SC-10

Severity

M

CCI

Version

APPL-15-000110

Vuln IDs

V-268444

Rule IDs

SV-268444r1131203_rule

SSH must be configured with an Active Server Alive Maximum Count set to 900. Setting the Active Server Alive Maximum Count to 900 will log users out after a 900-second interval of inactivity. Note: /etc/ssh/ssh_config will be automatically modified to its original state following any update or major upgrade to the operating system.

Checks: C-72474r1131201_chk

Verify the macOS system is configured to set the SSH ServerAliveInterval to 900 with the following command: ret="pass" for u in $(/usr/bin/dscl . -list /Users UniqueID | /usr/bin/awk '$2 > 500 {print $1}'); do sshCheck=$(/usr/bin/sudo -u $u /usr/bin/ssh -G . | /usr/bin/grep -c "^serveraliveinterval 900") if [[ "$sshCheck" == "0" ]]; then ret="fail" break fi done /bin/echo $ret If the result is not "pass", this is a finding.

Fix: F-72375r1131202_fix

Configure the macOS system to set the SSH ServerAliveInterval to 900 with the following command: include_dir=$(/usr/bin/awk '/^Include/ {print $2}' /etc/ssh/ssh_config | /usr/bin/tr -d '*') ssh_config_string=("ServerAliveInterval 900") for ssh_config in $ssh_config_string; do ssh_setting=$(echo $ssh_config | /usr/bin/cut -d " " -f1) /usr/bin/grep -qEi "^$ssh_setting" "${include_dir}01-mscp-ssh.conf" && /usr/bin/sed -i "" "s/^$ssh_setting.*/${ssh_config}/" "${include_dir}01-mscp-ssh.conf" || echo "$ssh_config" >> "${include_dir}01-mscp-ssh.conf" for u in $(/usr/bin/dscl . list /users shell | /usr/bin/egrep -v '(^_)|(root)|(/usr/bin/false)' | /usr/bin/awk '{print $1}'); do config=$(/usr/bin/sudo -u $u /usr/bin/ssh -Gv . 2>&1) configfiles=$(echo "$config" | /usr/bin/awk '/Reading configuration data/ {print $NF}'| /usr/bin/tr -d '\r') configarray=( ${(f)configfiles} ) if ! echo $config | /usr/bin/grep -q -i "$ssh_config" ; then for c in $configarray; do if [[ "$c" == "/etc/ssh/crypto.conf" ]]; then continue fi /usr/bin/sudo -u $u /usr/bin/grep -qEi "^$ssh_setting" "$c" && /usr/bin/sed -i "" "s/^$ssh_setting.*/${ssh_config}/I" "$c" if [[ "$c" =~ ".ssh/config" ]]; then if /usr/bin/grep -qEi "$ssh_setting" "$c" 2> /dev/null; then old_file=$(cat ~$u/.ssh/config) echo "$ssh_config" > ~$u/.ssh/config echo "$old_file" >> ~$u/.ssh/config fi fi done fi done done

b

The macOS system must configure SSHD channel timeout to 900.

SC-10 - Medium - CCI-001133 - V-268445 - SV-268445r1034275_rule

RMF Control

SC-10

Severity

M

CCI

Version

APPL-15-000120

Vuln IDs

V-268445

Rule IDs

SV-268445r1034275_rule

If SSHD is enabled, it must be configured with session ChannelTimeout set to 900. This will set the timeout when the session is inactive. NOTE: /etc/ssh/sshd_config will be automatically modified to its original state following any update or major upgrade to the operating system. Satisfies: SRG-OS-000163-GPOS-00072, SRG-OS-000279-GPOS-00109

Checks: C-72475r1034273_chk

Verify the macOS system is configured to set the SSHD Channel Timeout to 900 with the following command: /usr/sbin/sshd -G | /usr/bin/awk -F "=" '/channeltimeout session:*/{print $2}' If the result is not "900", this is a finding.

Fix: F-72376r1034274_fix

Configure the macOS system to set the SSHD ChannelTimeout to 900 with the following command: include_dir=$(/usr/bin/awk '/^Include/ {print $2}' /etc/ssh/sshd_config | /usr/bin/tr -d '*') if [[ -z $include_dir ]]; then /usr/bin/sed -i.bk "1s/.*/Include \/etc\/ssh\/sshd_config.d\/\*/" /etc/ssh/sshd_config fi /usr/bin/grep -qxF 'channeltimeout session:*=900' "${include_dir}01-mscp-sshd.conf" 2>/dev/null || echo "channeltimeout session:*=900" >> "${include_dir}01-mscp-sshd.conf" for file in $(ls ${include_dir}); do if [[ "$file" == "100-macos.conf" ]]; then continue fi if [[ "$file" == "01-mscp-sshd.conf" ]]; then break fi /bin/mv ${include_dir}${file} ${include_dir}20-${file} done

b

The macOS system must configure SSHD unused connection timeout to 900.

SC-10 - Medium - CCI-001133 - V-268446 - SV-268446r1034278_rule

RMF Control

SC-10

Severity

M

CCI

Version

APPL-15-000130

Vuln IDs

V-268446

Rule IDs

SV-268446r1034278_rule

If SSHD is enabled, it must be configured with unused connection timeout set to 900. This will set the timeout when there are no open channels within a session. NOTE: /etc/ssh/sshd_config will be automatically modified to its original state following any update or major upgrade to the operating system. Satisfies: SRG-OS-000163-GPOS-00072, SRG-OS-000279-GPOS-00109

Checks: C-72476r1034276_chk

Verify the macOS system is configured to set the SSHD unused connection timeout to 900 with the following command: /usr/sbin/sshd -G | /usr/bin/awk '/unusedconnectiontimeout/{print $2}' If the result is not "900", this is a finding.

Fix: F-72377r1034277_fix

Configure the macOS system to set the SSHD unused connection timeout to 900 with the following command: include_dir=$(/usr/bin/awk '/^Include/ {print $2}' /etc/ssh/sshd_config | /usr/bin/tr -d '*') if [[ -z $include_dir ]]; then /usr/bin/sed -i.bk "1s/.*/Include \/etc\/ssh\/sshd_config.d\/\*/" /etc/ssh/sshd_config fi /usr/bin/grep -qxF 'unusedconnectiontimeout 900' "${include_dir}01-mscp-sshd.conf" 2>/dev/null || echo "unusedconnectiontimeout 900" >> "${include_dir}01-mscp-sshd.conf" for file in $(ls ${include_dir}); do if [[ "$file" == "100-macos.conf" ]]; then continue fi if [[ "$file" == "01-mscp-sshd.conf" ]]; then break fi /bin/mv ${include_dir}${file} ${include_dir}20-${file} done

b

The macOS system must set SSH Active Server Alive Maximum to 0.

SC-10 - Medium - CCI-001133 - V-268447 - SV-268447r1131206_rule

RMF Control

SC-10

Severity

M

CCI

Version

APPL-15-000140

Vuln IDs

V-268447

Rule IDs

SV-268447r1131206_rule

SSH must be configured with an Active Server Alive Maximum Count set to 0. Terminating an idle session within a short time reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. Quickly terminating an idle session or an incomplete login attempt will also free up resources committed by the managed network element. Note: /etc/ssh/ssh_config will be automatically modified to its original state following any update or major upgrade to the operating system.

Checks: C-72477r1131204_chk

Verify the macOS system is configured to set SSH Active Server Alive Maximum to 0 with the following command: ret="pass" for u in $(/usr/bin/dscl . -list /Users UniqueID | /usr/bin/awk '$2 > 500 {print $1}'); do sshCheck=$(/usr/bin/sudo -u $u /usr/bin/ssh -G . | /usr/bin/grep -c "^serveralivecountmax 0") if [[ "$sshCheck" == "0" ]]; then ret="fail" break fi done /bin/echo $ret If the result is not "pass", this is a finding.

Fix: F-72378r1131205_fix

Configure the macOS system to set SSH Active Server Alive Maximum to 0 with the following command: include_dir=$(/usr/bin/awk '/^Include/ {print $2}' /etc/ssh/ssh_config | /usr/bin/tr -d '*') ssh_config=("ServerAliveCountMax 0") ssh_setting=$(echo $ssh_config | /usr/bin/cut -d " " -f1) /usr/bin/grep -qEi "^$ssh_setting" "${include_dir}01-mscp-ssh.conf" && /usr/bin/sed -i "" "s/^$ssh_setting.*/${ssh_config}/" "${include_dir}01-mscp-ssh.conf" || echo "$ssh_config" >> "${include_dir}01-mscp-ssh.conf" for u in $(/usr/bin/dscl . list /users shell | /usr/bin/egrep -v '(^_)|(root)|(/usr/bin/false)' | /usr/bin/awk '{print $1}'); do config=$(/usr/bin/sudo -u $u /usr/bin/ssh -Gv . 2>&1) configfiles=$(echo "$config" | /usr/bin/awk '/Reading configuration data/ {print $NF}'| /usr/bin/tr -d '\r') configarray=( ${(f)configfiles} ) if ! echo $config | /usr/bin/grep -q -i "$ssh_config" ; then for c in $configarray; do if [[ "$c" == "/etc/ssh/crypto.conf" ]]; then continue fi /usr/bin/sudo -u $u /usr/bin/grep -qEi "^$ssh_setting" "$c" && /usr/bin/sed -i "" "s/^$ssh_setting.*/${ssh_config}/I" "$c" if [[ "$c" =~ ".ssh/config" ]]; then if /usr/bin/grep -qEi "$ssh_setting" "$c" 2> /dev/null; then old_file=$(cat ~$u/.ssh/config) echo "$ssh_config" > ~$u/.ssh/config echo "$old_file" >> ~$u/.ssh/config fi fi done fi done

b

The macOS system must enforce auto logout after 86400 seconds of inactivity.

AC-12 - Medium - CCI-002361 - V-268448 - SV-268448r1034284_rule

RMF Control

AC-12

Severity

M

CCI

CCI-002361

Version

APPL-15-000160

Vuln IDs

V-268448

Rule IDs

SV-268448r1034284_rule

Auto logout must be configured to automatically terminate a user session and log out after 86400 seconds of inactivity. NOTE: The maximum that macOS can be configured for autologoff is 86400 seconds. [IMPORTANT] ==== The automatic logout may cause disruptions to an organization's workflow and/or loss of data. Information system security officers (ISSOs) are advised to first fully weigh the potential risks posed to their organization before opting to disable the automatic logout setting. ====

Checks: C-72478r1034282_chk

Verify the macOS system is configured to enforce auto logout after 86400 seconds of inactivity with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('.GlobalPreferences')\ .objectForKey('com.apple.autologout.AutoLogOutDelay').js EOS If the result is not "86400", this is a finding.

Fix: F-72379r1034283_fix

Configure the macOS system to enforce auto logout after 86400 seconds of inactivity by installing the "com.apple.GlobalPreferences" configuration profile.

b

The macOS system must be configured to use an authorized time server.

Medium - CCI-004923 - V-268449 - SV-268449r1038944_rule

RMF Control

Severity

M

CCI

CCI-004923

Version

APPL-15-000170

Vuln IDs

V-268449

Rule IDs

SV-268449r1038944_rule

An approved time server must be the only server configured for use. As of macOS 10.13, only one time server is supported. This rule ensures the uniformity of time stamps for information systems with multiple system clocks and systems connected over a network. Satisfies: SRG-OS-000355-GPOS-00143, SRG-OS-000356-GPOS-00144

Checks: C-72479r1034285_chk

Verify the macOS system is configured to use an authorized time server with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.MCX')\ .objectForKey('timeServer').js EOS If the result is not an authoritative time server that is synchronized with redundant USNO time servers as designated for the appropriate DOD network, this is a finding.

Fix: F-72380r1034286_fix

Configure the macOS system to use an authorized time server by installing the "com.apple.MCX" configuration profile.

b

The macOS system must enable the time synchronization daemon.

Medium - CCI-004923 - V-268450 - SV-268450r1038944_rule

RMF Control

Severity

M

CCI

CCI-004923

Version

APPL-15-000180

Vuln IDs

V-268450

Rule IDs

SV-268450r1038944_rule

The macOS time synchronization daemon (timed) must be enabled for proper time synchronization to an authorized time server. NOTE: The time synchronization daemon is enabled by default on macOS. Satisfies: SRG-OS-000355-GPOS-00143, SRG-OS-000356-GPOS-00144, SRG-OS-000785-GPOS-00250

Checks: C-72480r1034288_chk

Verify the macOS system is configured to enable the time synchronization daemon with the following command: /bin/launchctl list | /usr/bin/grep -c com.apple.timed If the result is not "1", this is a finding.

Fix: F-72381r1034289_fix

Configure the macOS system to enable the time synchronization daemon with the following command: /bin/launchctl load -w /System/Library/LaunchDaemons/com.apple.timed.plist NOTE: The service "timed" cannot be unloaded or loaded while System Integrity Protection (SIP) is enabled.

b

The macOS system must configure sudo to log events.

AU-12 - Medium - CCI-000172 - V-268451 - SV-268451r1131208_rule

RMF Control

AU-12

Severity

M

CCI

CCI-000172

Version

APPL-15-000190

Vuln IDs

V-268451

Rule IDs

SV-268451r1131208_rule

Sudo must be configured to log privilege escalation. Without logging privilege escalation, it is difficult to identify attempted attacks because no audit trail is available for forensic investigation.

Checks: C-72481r1034291_chk

Verify the macOS system is configured to log privilege escalation with the following command: /usr/bin/sudo /usr/bin/sudo -V | /usr/bin/grep -c "Log when a command is allowed by sudoers" If the result is not "1", this is a finding.

Fix: F-72382r1131207_fix

Configure the macOS system to log privilege escalation with the following command: /usr/bin/find /etc/sudoers* -type f -exec sed -i '' '/^Defaults[[:blank:]]*\!log_allowed/s/^/# /' '{}' \; /bin/echo "Defaults log_allowed" >> /etc/sudoers.d/mscp

b

The macOS system must be configured to audit all administrative action events.

AC-2 - Medium - CCI-000018 - V-268452 - SV-268452r1131210_rule

RMF Control

AC-2

Severity

M

CCI

CCI-000018

Version

APPL-15-001001

Vuln IDs

V-268452

Rule IDs

SV-268452r1131210_rule

The auditing system must be configured to flag administrative action (ad) events. Administrative action events include changes made to the system (e.g., modifying authentication policies). If audit records do not include ad events, it is difficult to identify incidents and to correlate incidents to subsequent events. Audit records can be generated from various components within the information system (e.g., via a module or policy filter). The information system audits the execution of privileged functions. Note: Changing the line "43127:AUE_MAC_SYSCALL:mac_syscall(2):ad" to "43127:AUE_MAC_SYSCALL:mac_syscall(2):zz" in the file /etc/security/audit_event is recommended. This will prevent sandbox violations from being audited by the ad flag. Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000303-GPOS-00120, SRG-OS-000327-GPOS-00127, SRG-OS-000365-GPOS-00152, SRG-OS-000392-GPOS-00172, SRG-OS-000458-GPOS-00203, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000476-GPOS-00221

Checks: C-72482r1131209_chk

Verify the macOS system is configured to audit privileged access with the following command: /usr/bin/awk -F':' '/^flags/ { print $NF }' /etc/security/audit_control | /usr/bin/tr ',' '\n' | /usr/bin/grep -Ec 'ad' If the result is not "1", this is a finding.

Fix: F-72383r1034295_fix

Configure the macOS system to audit privileged access with the following command: /usr/bin/grep -qE "^flags.*[^-]ad" /etc/security/audit_control || /usr/bin/sed -i.bak '/^flags/ s/$/,ad/' /etc/security/audit_control; /usr/sbin/audit -s A text editor may also be used to implement the required updates to the "/etc/security/audit_control" file.

b

The macOS system must be configured to audit all login and logout events.

AC-17 - Medium - CCI-000067 - V-268453 - SV-268453r1034299_rule

RMF Control

AC-17

Severity

M

CCI

CCI-000067

Version

APPL-15-001002

Vuln IDs

V-268453

Rule IDs

SV-268453r1034299_rule

The audit system must be configured to record all attempts to log in and out of the system (lo). 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 service account. The attacker must attempt to change to another user account with normal or elevated privileges to proceed. Auditing both successful and unsuccessful attempts to switch to another user account (by way of monitoring login and logout events) mitigates this risk. The information system monitors login and logout events. Satisfies: SRG-OS-000032-GPOS-00013, SRG-OS-000064-GPOS-00033, SRG-OS-000392-GPOS-00172, SRG-OS-000458-GPOS-00203, SRG-OS-000470-GPOS-00214, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000472-GPOS-00217, SRG-OS-000473-GPOS-00218

Checks: C-72483r1034297_chk

Verify the macOS system is configured to audit all login and logout events with the following command: /usr/bin/awk -F':' '/^flags/ { print $NF }' /etc/security/audit_control | /usr/bin/tr ',' '\n' | /usr/bin/grep -Ec '^lo' If the result is not "1", this is a finding.

Fix: F-72384r1034298_fix

Configure the macOS system to audit all login and logout events with the following command: /usr/bin/grep -qE "^flags.*[^-]lo" /etc/security/audit_control || /usr/bin/sed -i.bak '/^flags/ s/$/,lo/' /etc/security/audit_control; /usr/sbin/audit -s A text editor may also be used to implement the required updates to the "/etc/security/audit_control" file.

b

The macOS system must enable security auditing.

AU-3 - Medium - CCI-000130 - V-268454 - SV-268454r1034302_rule

RMF Control

AU-3

Severity

M

CCI

CCI-000130

Version

APPL-15-001003

Vuln IDs

V-268454

Rule IDs

SV-268454r1034302_rule

The information system must be configured to generate audit records. Audit records establish what types of events have occurred, when they occurred, and which users were involved. These records aid an organization in their efforts to establish, correlate, and investigate the events leading up to an outage or attack. The content required to be captured in an audit record varies based on the impact level of an organization's system. Content that may be necessary to satisfy this requirement includes, for example, time stamps, source addresses, destination addresses, user identifiers, event descriptions, success/fail indications, filenames involved, and access or flow control rules invoked. The information system initiates session audits at system startup. NOTE: Security auditing is NOT enabled by default on macOS Sequoia. Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000038-GPOS-00016, SRG-OS-000039-GPOS-00017, SRG-OS-000040-GPOS-00018, SRG-OS-000041-GPOS-00019, SRG-OS-000042-GPOS-00020, SRG-OS-000042-GPOS-00021, SRG-OS-000055-GPOS-00026, SRG-OS-000254-GPOS-00095, SRG-OS-000255-GPOS-00096, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099, SRG-OS-000337-GPOS-00129, SRG-OS-000358-GPOS-00145, SRG-OS-000359-GPOS-00146, SRG-OS-000365-GPOS-00152, SRG-OS-000392-GPOS-00172, SRG-OS-000458-GPOS-00203, SRG-OS-000461-GPOS-00205, SRG-OS-000462-GPOS-00206, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209, SRG-OS-000466-GPOS-00210, SRG-OS-000467-GPOS-00211, SRG-OS-000468-GPOS-00212, SRG-OS-000470-GPOS-00214, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000472-GPOS-00217, SRG-OS-000473-GPOS-00218, SRG-OS-000474-GPOS-00219, SRG-OS-000475-GPOS-00220, SRG-OS-000476-GPOS-00221, SRG-OS-000477-GPOS-00222, SRG-OS-000755-GPOS-00220

Checks: C-72484r1034300_chk

Verify the macOS system is configured to enable the auditd service with the following command: LAUNCHD_RUNNING=$(/bin/launchctl list | /usr/bin/grep -c com.apple.auditd) AUDITD_RUNNING=$(/usr/sbin/audit -c | /usr/bin/grep -c "AUC_AUDITING") if [[ $LAUNCHD_RUNNING == 1 ]] && [[ -e /etc/security/audit_control ]] && [[ $AUDITD_RUNNING == 1 ]]; then echo "pass" else echo "fail" fi If the result is not "pass", this is a finding.

Fix: F-72385r1034301_fix

Configure the macOS system to enable the auditd service with the following command: if [[ ! -e /etc/security/audit_control ]] && [[ -e /etc/security/audit_control.example ]];then /bin/cp /etc/security/audit_control.example /etc/security/audit_control fi /bin/launchctl enable system/com.apple.auditd /bin/launchctl bootstrap system /System/Library/LaunchDaemons/com.apple.auditd.plist /usr/sbin/audit -i

b

The macOS system must be configured to shut down upon audit failure.

AU-5 - Medium - CCI-000140 - V-268455 - SV-268455r1038966_rule

RMF Control

AU-5

Severity

M

CCI

CCI-000140

Version

APPL-15-001010

Vuln IDs

V-268455

Rule IDs

SV-268455r1038966_rule

The audit service must be configured to shut down the computer if it is unable to audit system events. Once audit failure occurs, user and system activity are no longer recorded, and malicious activity could go undetected. Audit processing failures can occur due to software/hardware errors, failures in the audit capturing mechanisms, and audit storage capacity being reached or exceeded.

Checks: C-72485r1034303_chk

Verify the macOS system is configured to shut down upon audit failure with the following command: /usr/bin/awk -F':' '/^policy/ {print $NF}' /etc/security/audit_control | /usr/bin/tr ',' '\n' | /usr/bin/grep -Ec 'ahlt' If the result is not "1", this is a finding.

Fix: F-72386r1034304_fix

Configure the macOS system to shut down upon audit failure with the following command: /usr/bin/sed -i.bak 's/^policy.*/policy: ahlt,argv/' /etc/security/audit_control; /usr/sbin/audit -s

b

The macOS system must configure audit log files to be owned by root.

AU-9 - Medium - CCI-000162 - V-268456 - SV-268456r1034308_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-001012

Vuln IDs

V-268456

Rule IDs

SV-268456r1034308_rule

Audit log files must be 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 be readable and writable only by system administrators, the risk is mitigated. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099

Checks: C-72486r1034306_chk

Verify the macOS system is configured with audit log files owned by root with the following command: /bin/ls -n $(/usr/bin/grep '^dir' /etc/security/audit_control | /usr/bin/awk -F: '{print $2}') | /usr/bin/awk '{s+=$3} END {print s}' If the result is not "0", this is a finding.

Fix: F-72387r1034307_fix

Configure the macOS system with audit log files owned by root with the following command: /usr/sbin/chown -R root /var/audit/*

b

The macOS system must configure audit log folders to be owned by root.

AU-9 - Medium - CCI-000162 - V-268457 - SV-268457r1034311_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-001013

Vuln IDs

V-268457

Rule IDs

SV-268457r1034311_rule

Audit log folders must be owned by root. The audit service must be configured to create log folders with the correct ownership 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 by system administrators, the risk is mitigated. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099

Checks: C-72487r1034309_chk

Verify the macOS system is configured with audit log folders owned by root with the following command: /bin/ls -dn $(/usr/bin/grep '^dir' /etc/security/audit_control | /usr/bin/awk -F: '{print $2}') | /usr/bin/awk '{print $3}' If the result is not "0", this is a finding.

Fix: F-72388r1034310_fix

Configure the macOS system with audit log folders owned by root with the following command: /usr/sbin/chown root /var/audit

b

The macOS system must configure the audit log files group to wheel.

AU-9 - Medium - CCI-000162 - V-268458 - SV-268458r1034314_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-001014

Vuln IDs

V-268458

Rule IDs

SV-268458r1034314_rule

Audit log files must have the group set to 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 by system administrators, the risk is mitigated. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099

Checks: C-72488r1034312_chk

Verify the macOS system is configured with audit log files group-owned by wheel with the following command: /bin/ls -n $(/usr/bin/grep '^dir' /etc/security/audit_control | /usr/bin/awk -F: '{print $2}') | /usr/bin/awk '{s+=$4} END {print s}' If the result is not "0", this is a finding.

Fix: F-72389r1034313_fix

Configure the macOS system with audit log files group-owned by wheel with the following command: /usr/bin/chgrp -R wheel /var/audit/*

b

The macOS system must configure the audit log folders group to wheel.

AU-9 - Medium - CCI-000162 - V-268459 - SV-268459r1034317_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-001015

Vuln IDs

V-268459

Rule IDs

SV-268459r1034317_rule

Audit log files must have the group set to 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 by system administrators, the risk is mitigated. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099

Checks: C-72489r1034315_chk

Verify the macOS system is configured with audit log folders group-owned by wheel with the following command: /bin/ls -dn $(/usr/bin/grep '^dir' /etc/security/audit_control | /usr/bin/awk -F: '{print $2}') | /usr/bin/awk '{print $4}' If the result is not "0", this is a finding.

Fix: F-72390r1034316_fix

Configure the macOS system with audit log folders group-owned by wheel with the following command: /usr/bin/chgrp wheel /var/audit

b

The macOS system must configure audit log files to mode 440 or less permissive.

AU-9 - Medium - CCI-000162 - V-268460 - SV-268460r1034320_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-001016

Vuln IDs

V-268460

Rule IDs

SV-268460r1034320_rule

The audit service must be configured to create log files that are readable only by the root user and group wheel. To achieve this, audit log files must be configured to mode 440 or less permissive to prevent normal users from reading, modifying, or deleting audit logs. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099

Checks: C-72490r1034318_chk

Verify the macOS system is configured with audit log files set to mode 440 or less with the following command: /bin/ls -l $(/usr/bin/grep '^dir' /etc/security/audit_control | /usr/bin/awk -F: '{print $2}') | /usr/bin/awk '!/-r--r-----|current|total/{print $1}' | /usr/bin/wc -l | /usr/bin/tr -d ' ' If the result is not "0", this is a finding.

Fix: F-72391r1034319_fix

Configure the macOS system with audit log files set to mode 440 with the following command: /bin/chmod 440 /var/audit/*

b

The macOS system must configure audit log folders to mode 700 or less permissive.

AU-9 - Medium - CCI-000162 - V-268461 - SV-268461r1034323_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-001017

Vuln IDs

V-268461

Rule IDs

SV-268461r1034323_rule

The audit log folder must be configured to mode 700 or less permissive so that only the root user is able to read, write, and execute changes to folders. Because audit logs contain sensitive data about the system and users, the audit service must be configured to mode 700 or less permissive to prevent normal users from reading, modifying or deleting audit logs. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099

Checks: C-72491r1034321_chk

Verify the macOS system is configured with audit log folders set to mode 700 or less permissive with the following command: /usr/bin/stat -f %A $(/usr/bin/grep '^dir' /etc/security/audit_control | /usr/bin/awk -F: '{print $2}') If the result is not a mode of 700 or less permissive, this is a finding.

Fix: F-72392r1034322_fix

Configure the macOS system with audit log folders set to mode 700 with the following command: /bin/chmod 700 /var/audit

b

The macOS system must be configured to audit all deletions of object attributes.

AU-9 - Medium - CCI-000162 - V-268462 - SV-268462r1034326_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-001020

Vuln IDs

V-268462

Rule IDs

SV-268462r1034326_rule

The audit system must be configured to record enforcement actions of attempts to delete file attributes (fd). ***Enforcement actions are the methods or mechanisms used to prevent unauthorized changes to configuration settings. One common and effective enforcement action method is using access restrictions (i.e., denying modifications to a file by applying file permissions). This configuration ensures that audit lists include events in which enforcement actions prevent attempts to delete a file. Without auditing the enforcement of access restrictions, it is difficult to identify attempted attacks because no audit trail is available for forensic investigation. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000064-GPOS-00033, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099, SRG-OS-000365-GPOS-00152, SRG-OS-000392-GPOS-00172, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209, SRG-OS-000466-GPOS-00210, SRG-OS-000467-GPOS-00211, SRG-OS-000468-GPOS-00212

Checks: C-72492r1034324_chk

Verify the macOS system is configured to audit all deletions of object attributes with the following command: /usr/bin/awk -F':' '/^flags/ { print $NF }' /etc/security/audit_control | /usr/bin/tr ',' '\n' | /usr/bin/grep -Ec '\-fd' If the result is not "1", this is a finding.

Fix: F-72393r1034325_fix

Configure the macOS system to audit all deletions of object attributes with the following command: /usr/bin/grep -qE "^flags.*-fd" /etc/security/audit_control || /usr/bin/sed -i.bak '/^flags/ s/$/,-fd/' /etc/security/audit_control;/usr/sbin/audit -s

b

The macOS system must be configured to audit all changes of object attributes.

AU-9 - Medium - CCI-000162 - V-268463 - SV-268463r1034329_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-001021

Vuln IDs

V-268463

Rule IDs

SV-268463r1034329_rule

The audit system must be configured to record enforcement actions of attempts to modify file attributes (fm). Enforcement actions are the methods or mechanisms used to prevent unauthorized changes to configuration settings. One common and effective enforcement action method is using access restrictions (i.e., modifications to a file by applying file permissions). This configuration ensures that audit lists include events in which enforcement actions attempt to modify a file. Without auditing the enforcement of access restrictions, it is difficult to identify attempted attacks because no audit trail is available for forensic investigation. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000064-GPOS-00033, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099, SRG-OS-000365-GPOS-00152, SRG-OS-000392-GPOS-00172, SRG-OS-000458-GPOS-00203, SRG-OS-000462-GPOS-00206, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209, SRG-OS-000466-GPOS-00210, SRG-OS-000467-GPOS-00211, SRG-OS-000468-GPOS-00212

Checks: C-72493r1034327_chk

Verify the macOS system is configured to audit all changes of object attributes with the following command: /usr/bin/awk -F':' '/^flags/ { print $NF }' /etc/security/audit_control | /usr/bin/tr ',' '\n' | /usr/bin/grep -Ec '^fm' If the result is not "1", this is a finding.

Fix: F-72394r1034328_fix

Configure the macOS system to audit all changes of object attributes with the following command: /usr/bin/grep -qE "^flags.*fm" /etc/security/audit_control || /usr/bin/sed -i.bak '/^flags/ s/$/,fm/' /etc/security/audit_control;/usr/sbin/audit -s

b

The macOS system must be configured to audit all failed read actions on the system.

AU-9 - Medium - CCI-000162 - V-268464 - SV-268464r1034332_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-001022

Vuln IDs

V-268464

Rule IDs

SV-268464r1034332_rule

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 because no audit trail is available for forensic investigation. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000064-GPOS-00033, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099, SRG-OS-000365-GPOS-00152, SRG-OS-000392-GPOS-00172, SRG-OS-000458-GPOS-00203, SRG-OS-000461-GPOS-00205, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209, SRG-OS-000474-GPOS-00219

Checks: C-72494r1034330_chk

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.

Fix: F-72395r1034331_fix

Configure the macOS system to audit all failed read actions on the system with the following command: /usr/bin/grep -qE "^flags.*-fr" /etc/security/audit_control || /usr/bin/sed -i.bak '/^flags/ s/$/,-fr/' /etc/security/audit_control;/usr/sbin/audit -s

b

The macOS system must be configured to audit all failed write actions on the system.

AU-9 - Medium - CCI-000162 - V-268465 - SV-268465r1034335_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-001023

Vuln IDs

V-268465

Rule IDs

SV-268465r1034335_rule

The audit system must be configured to record enforcement actions of access restrictions, including failed file write (-fw) 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 users access to edit a file by applying file permissions). This configuration ensures that audit lists include events in which enforcement actions prevent attempts to change a file. Without auditing the enforcement of access restrictions, it is difficult to identify attempted attacks because no audit trail is available for forensic investigation. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000064-GPOS-00033, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099, SRG-OS-000365-GPOS-00152, SRG-OS-000392-GPOS-00172, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209, SRG-OS-000466-GPOS-00210, SRG-OS-000467-GPOS-00211, SRG-OS-000468-GPOS-00212

Checks: C-72495r1034333_chk

Verify the macOS system is configured to audit all failed write 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 '\-fw' If the result is not "1", this is a finding.

Fix: F-72396r1034334_fix

Configure the macOS system to audit all failed write actions on the system with the following command: /usr/bin/grep -qE "^flags.*-fw" /etc/security/audit_control || /usr/bin/sed -i.bak '/^flags/ s/$/,-fw/' /etc/security/audit_control;/usr/sbin/audit -s

a

The macOS system must configure audit retention to seven days.

AU-4 - Low - CCI-001849 - V-268467 - SV-268467r1034341_rule

RMF Control

AU-4

Severity

L

CCI

CCI-001849

Version

APPL-15-001029

Vuln IDs

V-268467

Rule IDs

SV-268467r1034341_rule

The audit service must be configured to require that records be kept for an organizational-defined value before deletion unless the system uses a central audit record storage facility. When "expire-after" is set to "7d", the audit service will not delete audit logs until the log data criteria is met.

Checks: C-72497r1034339_chk

Verify the macOS system is configured to set audit retention to seven days with the following command: /usr/bin/awk -F: '/expire-after/{print $2}' /etc/security/audit_control If the result is not "7d", this is a finding.

Fix: F-72398r1034340_fix

Configure the macOS system to set audit retention to seven days with the following command: /usr/bin/sed -i.bak 's/^expire-after.*/expire-after:7d/' /etc/security/audit_control; /usr/sbin/audit -s

b

The macOS system must configure audit capacity warning.

AU-5 - Medium - CCI-000139 - V-268468 - SV-268468r1034344_rule

RMF Control

AU-5

Severity

M

CCI

CCI-000139

Version

APPL-15-001030

Vuln IDs

V-268468

Rule IDs

SV-268468r1034344_rule

The audit service must be configured to notify the system administrator when the amount of free disk space remaining reaches an organization-defined value. This rule ensures that the system administrator is notified in advance that action is required to free up more disk space for audit logs. Satisfies: SRG-OS-000046-GPOS-00022, SRG-OS-000343-GPOS-00134

Checks: C-72498r1034342_chk

Verify the macOS system is configured to require a minimum of 25 percent free disk space for audit record storage with the following command: /usr/bin/awk -F: '/^minfree/{print $2}' /etc/security/audit_control If the result is not "25", this is a finding.

Fix: F-72399r1034343_fix

Configure the macOS system to require a minimum of 25 percent free disk space for audit record storage with the following command: /usr/bin/sed -i.bak 's/.*minfree.*/minfree:25/' /etc/security/audit_control; /usr/sbin/audit -s

b

The macOS system must configure audit failure notification.

AU-5 - Medium - CCI-000140 - V-268469 - SV-268469r1038966_rule

RMF Control

AU-5

Severity

M

CCI

CCI-000140

Version

APPL-15-001031

Vuln IDs

V-268469

Rule IDs

SV-268469r1038966_rule

The audit service must 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 made aware immediately if a system is at risk of failing to process audit logs as required. Without a real-time alert, security personnel may be unaware of a potentially harmful failure in the auditing system's capability, and system operation may be adversely affected. Satisfies: SRG-OS-000047-GPOS-00023, SRG-OS-000344-GPOS-00135

Checks: C-72499r1034345_chk

Verify the macOS system is configured to produce audit failure notification with the following command: /usr/bin/grep -c "logger -s -p" /etc/security/audit_warn If the result is not "1", this is a finding.

Fix: F-72400r1034346_fix

Configure the macOS system to produce audit failure notification with the following command: /usr/bin/sed -i.bak 's/logger -p/logger -s -p/' /etc/security/audit_warn; /usr/sbin/audit -s

b

The macOS system must be configured to audit all authorization and authentication events.

Medium - CCI-003938 - V-268470 - SV-268470r1034350_rule

RMF Control

Severity

M

CCI

CCI-003938

Version

APPL-15-001044

Vuln IDs

V-268470

Rule IDs

SV-268470r1034350_rule

The auditing system must be configured to flag authorization and authentication (aa) events. Authentication events contain information about the identity of a user, server, or client. Authorization events contain information about permissions, rights, and rules. If audit records do not include aa events, it is difficult to identify incidents and correlate incidents to subsequent events. Audit records can be generated from various components within the information system (e.g., via a module or policy filter). Satisfies: SRG-OS-000365-GPOS-00152, SRG-OS-000392-GPOS-00172, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209, SRG-OS-000466-GPOS-00210, SRG-OS-000467-GPOS-00211, SRG-OS-000468-GPOS-00212, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000475-GPOS-00220, SRG-OS-000477-GPOS-00222

Checks: C-72500r1034348_chk

Verify the macOS system is configured to audit login events with the following command: /usr/bin/awk -F':' '/^flags/ { print $NF }' /etc/security/audit_control | /usr/bin/tr ',' '\n' | /usr/bin/grep -Ec 'aa' If the result is not "1", this is a finding.

Fix: F-72401r1034349_fix

Configure the macOS system to audit login events with the following command: /usr/bin/grep -qE "^flags.*[^-]aa" /etc/security/audit_control || /usr/bin/sed -i.bak '/^flags/ s/$/,aa/' /etc/security/audit_control; /usr/sbin/audit -s

b

The macOS system must set smart card certificate trust to moderate.

IA-5 - Medium - CCI-000185 - V-268471 - SV-268471r1034353_rule

RMF Control

IA-5

Severity

M

CCI

CCI-000185

Version

APPL-15-001060

Vuln IDs

V-268471

Rule IDs

SV-268471r1034353_rule

The macOS system must be configured to block access to users who are no longer authorized (i.e., users with revoked certificates). To prevent the use of untrusted certificates, the certificates on a smart card must meet the following criteria: its issuer has a system-trusted certificate, the certificate is not expired, its "valid-after" date is in the past, and it passes Certificate Revocation List (CRL) and Online Certificate Status Protocol (OCSP) checking. By setting the smart card certificate trust level to moderate, the system will execute a soft revocation, i.e., if the OCSP/CRL server is unreachable, authentication will still succeed. NOTE: Before applying this setting, refer to the smart card supplemental guidance. Satisfies: SRG-OS-000066-GPOS-00034, SRG-OS-000377-GPOS-00162, SRG-OS-000384-GPOS-00167, SRG-OS-000403-GPOS-00182

Checks: C-72501r1034351_chk

Verify the macOS system is configured to check the revocation status of user certificates with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.security.smartcard')\ .objectForKey('checkCertificateTrust').js EOS If the result is not "2", this is a finding.

Fix: F-72402r1034352_fix

Configure the macOS system to check the revocation status of user certificates by installing the "com.apple.security.smartcard" configuration profile. NOTE: To ensure continued access to the operating system, consult the supplemental guidance provided with the STIG before applying the configuration profile.

b

The macOS system must disable root login for SSH.

Medium - CCI-004045 - V-268472 - SV-268472r1034356_rule

RMF Control

Severity

M

CCI

CCI-004045

Version

APPL-15-001100

Vuln IDs

V-268472

Rule IDs

SV-268472r1034356_rule

If SSH is enabled to ensure individual accountability and prevent unauthorized access, logging in as root via SSH must be disabled. The macOS system MUST require individuals to be authenticated with an individual authenticator prior to using a group authenticator, and administrator users must never log in directly as root. NOTE: /etc/ssh/sshd_config will be automatically modified to its original state following any update or major upgrade to the operating system. Satisfies: SRG-OS-000109-GPOS-00056, SRG-OS-000364-GPOS-00151

Checks: C-72502r1034354_chk

Verify the macOS system is configured to disable root login for SSH with the following command: /usr/sbin/sshd -G | /usr/bin/awk '/permitrootlogin/{print $2}' If the result is not "no", this is a finding.

Fix: F-72403r1034355_fix

Configure the macOS system to disable root login for SSH with the following command: include_dir=$(/usr/bin/awk '/^Include/ {print $2}' /etc/ssh/sshd_config | /usr/bin/tr -d '*') if [[ -z $include_dir ]]; then /usr/bin/sed -i.bk "1s/.*/Include \/etc\/ssh\/sshd_config.d\/\*/" /etc/ssh/sshd_config fi /usr/bin/grep -qxF 'permitrootlogin no' "${include_dir}01-mscp-sshd.conf" 2>/dev/null || echo "permitrootlogin no" >> "${include_dir}01-mscp-sshd.conf" for file in $(ls ${include_dir}); do if [[ "$file" == "100-macos.conf" ]]; then continue fi if [[ "$file" == "01-mscp-sshd.conf" ]]; then break fi /bin/mv ${include_dir}${file} ${include_dir}20-${file} done

b

The macOS system must configure audit_control group to wheel.

AU-9 - Medium - CCI-000162 - V-268473 - SV-268473r1034359_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-001110

Vuln IDs

V-268473

Rule IDs

SV-268473r1034359_rule

/etc/security/audit_control must have the group set to wheel. The audit service must be configured with the correct group ownership to prevent normal users from manipulating audit log configurations. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000063-GPOS-00032, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099

Checks: C-72503r1034357_chk

Verify the macOS system is configured with the audit_control group to wheel with the following command: /bin/ls -dn /etc/security/audit_control | /usr/bin/awk '{print $4}' If the result is not "0", this is a finding.

Fix: F-72404r1034358_fix

Configure the macOS system with the audit_control group to wheel with the following command: /usr/bin/chgrp wheel /etc/security/audit_control

b

The macOS system must configure audit_control owner to root.

AU-9 - Medium - CCI-000162 - V-268474 - SV-268474r1034362_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-001120

Vuln IDs

V-268474

Rule IDs

SV-268474r1034362_rule

/etc/security/audit_control must have the owner set to root. The audit service must be configured with the correct ownership to prevent normal users from manipulating audit log configurations. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000063-GPOS-00032, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099

Checks: C-72504r1034360_chk

Verify the macOS system is configured with the audit_control owner to root with the following command: /bin/ls -dn /etc/security/audit_control | /usr/bin/awk '{print $3}' If the result is not "0", this is a finding.

Fix: F-72405r1034361_fix

Configure the macOS system with the audit_control owner to root with the following command: /usr/sbin/chown root /etc/security/audit_control

b

The macOS system must configure audit_control owner to mode 440 or less permissive.

AU-9 - Medium - CCI-000162 - V-268475 - SV-268475r1034365_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-001130

Vuln IDs

V-268475

Rule IDs

SV-268475r1034365_rule

/etc/security/audit_control must be configured so that it is readable only by the root user and group wheel. The audit service must be configured with the correct mode to prevent normal users from manipulating audit log configurations. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000063-GPOS-00032, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099

Checks: C-72505r1034363_chk

Verify the macOS system is configured with the audit_control to mode 440 or less with the following command: /bin/ls -l /etc/security/audit_control | /usr/bin/awk '!/-r--[r-]-----|current|total/{print $1}' | /usr/bin/wc -l | /usr/bin/xargs If the result is not "0", this is a finding.

Fix: F-72406r1034364_fix

Configure the macOS system with the audit_control to mode 440 with the following command: /bin/chmod 440 /etc/security/audit_control

c

The macOS system must disable password authentication for SSH.

IA-5 - High - CCI-000186 - V-268477 - SV-268477r1034371_rule

RMF Control

IA-5

Severity

H

CCI

CCI-000186

Version

APPL-15-001150

Vuln IDs

V-268477

Rule IDs

SV-268477r1034371_rule

If remote login through SSH is enabled, password-based authentication must be disabled for user login. All users must go through multifactor authentication to prevent unauthenticated access and potential compromise to the system. NOTE: /etc/ssh/sshd_config will be automatically modified to its original state following any update or major upgrade to the operating system. Satisfies: SRG-OS-000067-GPOS-00035, SRG-OS-000105-GPOS-00052, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000108-GPOS-00055, SRG-OS-000112-GPOS-00057, SRG-OS-000125-GPOS-00065, SRG-OS-000375-GPOS-00160

Checks: C-72507r1034369_chk

Verify the macOS system is configured to disable password authentication for SSH with the following command: /usr/sbin/sshd -G | /usr/bin/grep -Ec '^(passwordauthentication\s+no|kbdinteractiveauthentication\s+no)' If the result is not "2", this is a finding.

Fix: F-72408r1034370_fix

Configure the macOS system to disable password authentication for SSH with the following command: include_dir=$(/usr/bin/awk '/^Include/ {print $2}' /etc/ssh/sshd_config | /usr/bin/tr -d '*') if [[ -z $include_dir ]]; then /usr/bin/sed -i.bk "1s/.*/Include \/etc\/ssh\/sshd_config.d\/\*/" /etc/ssh/sshd_config fi echo "passwordauthentication no" >> "${include_dir}01-mscp-sshd.conf" echo "kbdinteractiveauthentication no" >> "${include_dir}01-mscp-sshd.conf" for file in $(ls ${include_dir}); do if [[ "$file" == "100-macos.conf" ]]; then continue fi if [[ "$file" == "01-mscp-sshd.conf" ]]; then break fi /bin/mv ${include_dir}${file} ${include_dir}20-${file} done

b

The macOS system must disable Server Message Block (SMB) sharing.

AC-3 - Medium - CCI-000213 - V-268478 - SV-268478r1117265_rule

RMF Control

AC-3

Severity

M

CCI

Version

APPL-15-002001

Vuln IDs

V-268478

Rule IDs

SV-268478r1117265_rule

Support for SMB file sharing is nonessential and must be disabled. The information system must be configured to provide only essential capabilities. Enabling any service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.

Checks: C-72508r1034372_chk

Verify the macOS system is configured to disable SMB sharing with the following command: /bin/launchctl print-disabled system | /usr/bin/grep -c '"com.apple.smbd" => disabled' If the result is not "1", this is a finding.

Fix: F-72409r1034373_fix

Configure the macOS system to disable SMB sharing with the following command: /bin/launchctl disable system/com.apple.smbd The system may need to be restarted for the update to take effect.

b

The macOS system must disable Network File System (NFS) service.

AC-3 - Medium - CCI-000213 - V-268479 - SV-268479r1117265_rule

RMF Control

AC-3

Severity

M

CCI

Version

APPL-15-002003

Vuln IDs

V-268479

Rule IDs

SV-268479r1117265_rule

Support for NFS services is nonessential and, therefore, must be disabled. Enabling any service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.

Checks: C-72509r1034375_chk

Verify the macOS system is configured to disable NFS service with the following command: /bin/launchctl print-disabled system | /usr/bin/grep -c '"com.apple.nfsd" => disabled' If the result is not "1", this is a finding.

Fix: F-72410r1034376_fix

Configure the macOS system to disable NFS service with the following command: /bin/launchctl disable system/com.apple.nfsd The system may need to be restarted for the update to take effect.

b

The macOS system must disable Location Services.

CM-7 - Medium - CCI-000381 - V-268480 - SV-268480r1034380_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002004

Vuln IDs

V-268480

Rule IDs

SV-268480r1034380_rule

Location Services must be disabled. The information system must be configured to provide only essential capabilities. Disabling Location Services helps prevent unauthorized connection of devices, transfer of information, and tunneling.

Checks: C-72510r1034378_chk

Verify the macOS system is configured to disable Location Services with the following command: /usr/bin/sudo -u _locationd /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.locationd')\ .objectForKey('LocationServicesEnabled').js EOS If the result is not "false", this is a finding.

Fix: F-72411r1034379_fix

Configure the macOS system to disable Location Services with the following command: /usr/bin/defaults write /var/db/locationd/Library/Preferences/ByHost/com.apple.locationd LocationServicesEnabled -bool false; pid=$(/bin/launchctl list | /usr/bin/awk '/com.apple.locationd/ { print $1 }') kill -9 $pid

b

The macOS system must disable Bonjour multicast.

CM-7 - Medium - CCI-000381 - V-268481 - SV-268481r1034383_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002005

Vuln IDs

V-268481

Rule IDs

SV-268481r1034383_rule

Bonjour multicast advertising must be disabled to prevent the system from broadcasting its presence and available services over network interfaces.

Checks: C-72511r1034381_chk

Verify the macOS system is configured to disable Bonjour multicast with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.mDNSResponder')\ .objectForKey('NoMulticastAdvertisements').js EOS If the result is not "true", this is a finding.

Fix: F-72412r1034382_fix

Configure the macOS system to disable Bonjour multicast by installing the "com.apple.mDNSResponder" configuration profile.

b

The macOS system must disable Unix-to-Unix Copy Protocol (UUCP) service.

AC-3 - Medium - CCI-000213 - V-268482 - SV-268482r1117265_rule

RMF Control

AC-3

Severity

M

CCI

Version

APPL-15-002006

Vuln IDs

V-268482

Rule IDs

SV-268482r1117265_rule

The system must not have the UUCP service active. UUCP, a set of programs that enables sending files between different Unix systems and sending commands to be executed on another system, is not essential and must be disabled to prevent unauthorized connection of devices, transfer of information, and tunneling. NOTE: UUCP service is disabled at startup by default with macOS.

Checks: C-72512r1034384_chk

Verify the macOS system is configured to disable UUCP service with the following command: /bin/launchctl print-disabled system | /usr/bin/grep -c '"com.apple.uucp" => disabled' If the result is not "1", this is a finding.

Fix: F-72413r1034385_fix

Configure the macOS system to disable UUCP service with the following command: /bin/launchctl disable system/com.apple.uucp The system may need to be restarted for the update to take effect.

b

The macOS system must disable Internet Sharing.

CM-7 - Medium - CCI-000381 - V-268483 - SV-268483r1034389_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002007

Vuln IDs

V-268483

Rule IDs

SV-268483r1034389_rule

If the system does not require Internet Sharing, support for it is nonessential and must be disabled. The information system must be configured to provide only essential capabilities. Disabling Internet Sharing helps prevent unauthorized connection of devices, transfer of information, and tunneling.

Checks: C-72513r1034387_chk

Verify the macOS system is configured to disable Internet Sharing with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.MCX')\ .objectForKey('forceInternetSharingOff').js EOS If the result is not "true", this is a finding.

Fix: F-72414r1034388_fix

Configure the macOS system to disable Internet Sharing by installing the "com.apple.MCX" configuration profile.

b

The macOS system must disable the built-in web server.

AC-3 - Medium - CCI-000213 - V-268484 - SV-268484r1117265_rule

RMF Control

AC-3

Severity

M

CCI

Version

APPL-15-002008

Vuln IDs

V-268484

Rule IDs

SV-268484r1117265_rule

The built-in web server is a nonessential service built into macOS and must be disabled. NOTE: The built-in web server is disabled at startup by default with macOS.

Checks: C-72514r1034390_chk

Verify the macOS system is configured to disable the built-in web server with the following command: /bin/launchctl print-disabled system | /usr/bin/grep -c '"org.apache.httpd" => disabled' If the result is not "1", this is a finding.

Fix: F-72415r1034391_fix

Configure the macOS system to disable the built-in web server with the following command: /bin/launchctl disable system/org.apache.httpd The system may need to be restarted for the update to take effect.

b

The macOS system must disable AirDrop.

AC-3 - Medium - CCI-000213 - V-268485 - SV-268485r1117265_rule

RMF Control

AC-3

Severity

M

CCI

Version

APPL-15-002009

Vuln IDs

V-268485

Rule IDs

SV-268485r1117265_rule

AirDrop must be disabled to prevent file transfers to or from unauthorized devices. AirDrop allows users to share and receive files from other nearby Apple devices. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000095-GPOS-00049, SRG-OS-000300-GPOS-00118

Checks: C-72515r1034393_chk

Verify the macOS system is configured to disable AirDrop with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowAirDrop').js EOS If the result is not "false", this is a finding.

Fix: F-72416r1034394_fix

Configure the macOS system to disable AirDrop by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable FaceTime.app.

CM-7 - Medium - CCI-000381 - V-268486 - SV-268486r1034398_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002010

Vuln IDs

V-268486

Rule IDs

SV-268486r1034398_rule

The macOS built-in FaceTime.app must be disabled. The FaceTime.app establishes a connection to Apple's iCloud service even when security controls have been put in place to disable iCloud access. [IMPORTANT] ==== Apple has deprecated the use of application restriction controls (https://github.com/apple/device-management/blob/eb51fb0cb9626cac4717858556912c257a734ce0/mdm/profiles/com.apple.applicationaccess.new.yaml#L67-L70). Using these controls may not work as expected. Third-party software may be required to fulfill the compliance requirements. ====

Checks: C-72516r1034396_chk

Verify the macOS system is configured to disable FaceTime.app with the following command: /usr/bin/osascript -l JavaScript << EOS function run() { let pref1 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess.new')\ .objectForKey('familyControlsEnabled')) let pathlist = $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess.new')\ .objectForKey('pathBlackList').js for ( let app in pathlist ) { if ( ObjC.unwrap(pathlist[app]) == "/Applications/FaceTime.app" && pref1 == true ){ return("true") } } return("false") } EOS If the result is not "true", this is a finding.

Fix: F-72417r1034397_fix

Configure the macOS system to disable FaceTime.app by installing the "com.apple.applicationaccess.new" configuration profile.

b

The macOS system must disable the iCloud Calendar services.

CM-7 - Medium - CCI-000381 - V-268487 - SV-268487r1034401_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002012

Vuln IDs

V-268487

Rule IDs

SV-268487r1034401_rule

The macOS built-in Calendar.app connection to Apple's iCloud service must be disabled. Apple's iCloud service does not provide an organization with enough control over the storage and access of data and, therefore, automated calendar synchronization must be controlled by an organization-approved service.

Checks: C-72517r1034399_chk

Verify the macOS system is configured to disable iCloud Calendar services with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudCalendar').js EOS If the result is not "false", this is a finding.

Fix: F-72418r1034400_fix

Configure the macOS system to disable iCloud Calendar services by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable iCloud Reminders.

CM-7 - Medium - CCI-000381 - V-268488 - SV-268488r1034404_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002013

Vuln IDs

V-268488

Rule IDs

SV-268488r1034404_rule

The macOS built-in Reminders.app connection to Apple's iCloud service must be disabled. Apple's iCloud service does not provide an organization with enough control over the storage and access of data and, therefore, automated reminders synchronization must be controlled by an organization-approved service.

Checks: C-72518r1034402_chk

Verify the macOS system is configured to disable iCloud Reminders with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudReminders').js EOS If the result is not "false", this is a finding.

Fix: F-72419r1034403_fix

Configure the macOS system to disable iCloud Reminders by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable iCloud Address Book.

CM-7 - Medium - CCI-000381 - V-268489 - SV-268489r1034407_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002014

Vuln IDs

V-268489

Rule IDs

SV-268489r1034407_rule

The macOS built-in Contacts.app connection to Apple's iCloud service must be disabled. Apple's iCloud service does not provide an organization with enough control over the storage and access of data, and, therefore, automated contact synchronization must be controlled by an organization-approved service.

Checks: C-72519r1034405_chk

Verify the macOS system is configured to disable iCloud Address Book with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudAddressBook').js EOS If the result is not "false", this is a finding.

Fix: F-72420r1034406_fix

Configure the macOS system to disable iCloud Address Book by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable iCloud Mail.

CM-7 - Medium - CCI-000381 - V-268490 - SV-268490r1034410_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002015

Vuln IDs

V-268490

Rule IDs

SV-268490r1034410_rule

The macOS built-in Mail.app connection to Apple's iCloud service must be disabled. Apple's iCloud service does not provide an organization with enough control over the storage and access of data and, therefore, automated mail synchronization must be controlled by an organization-approved service.

Checks: C-72520r1034408_chk

Verify the macOS system is configured to disable iCloud Mail with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudMail').js EOS If the result is not "false", this is a finding.

Fix: F-72421r1034409_fix

Configure the macOS system to disable iCloud Mail by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable iCloud Notes.

CM-7 - Medium - CCI-000381 - V-268491 - SV-268491r1034413_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002016

Vuln IDs

V-268491

Rule IDs

SV-268491r1034413_rule

The macOS built-in Notes.app connection to Apple's iCloud service must be disabled. Apple's iCloud service does not provide an organization with enough control over the storage and access of data and, therefore, automated Notes synchronization must be controlled by an organization-approved service.

Checks: C-72521r1034411_chk

Verify the macOS system is configured to disable iCloud Notes with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudNotes').js EOS If the result is not "false", this is a finding.

Fix: F-72422r1034412_fix

Configure the macOS system to disable iCloud Notes by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable the camera.

CM-7 - Medium - CCI-000381 - V-268492 - SV-268492r1034416_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002017

Vuln IDs

V-268492

Rule IDs

SV-268492r1034416_rule

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 risk to the platform by providing additional attack vectors. Failing to disconnect from collaborative computing devices (i.e., cameras) can result in subsequent compromises of organizational information. Providing easy methods to physically disconnect from such devices after a collaborative computing session helps to ensure that participants carry out the disconnect activity without having to go through complex and tedious procedures.

Checks: C-72522r1034414_chk

If the device or operating system does not have a camera installed, this requirement is not applicable. This requirement is not applicable to mobile devices (smartphones and tablets), where the use of the camera is a local authorizing official (AO) decision. This requirement is not applicable to dedicated video teleconference (VTC) suites in approved VTC locations that are centrally managed. For an external camera, if there is not a method for the operator to manually disconnect camera at the end of collaborative computing sessions, this is a finding. For a built-in camera, the camera must be protected by a camera cover (e.g., laptop camera cover slide) when not in use. If the built-in camera is not protected with a camera cover or is not physically disabled, this is a finding. If the camera is not disconnected, covered, or physically disabled, verify the macOS system is configured to disable the camera with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCamera').js EOS If the result is not "false", this is a finding.

Fix: F-72423r1034415_fix

Configure the macOS system to disable the camera by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable Siri.

CM-7 - Medium - CCI-000381 - V-268493 - SV-268493r1034419_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002020

Vuln IDs

V-268493

Rule IDs

SV-268493r1034419_rule

Support for Siri is nonessential and must be disabled. The information system must be configured to provide only essential capabilities. Enabling any service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.

Checks: C-72523r1034417_chk

Verify the macOS system is configured to disable Siri with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowAssistant').js EOS If the result is not "false", this is a finding.

Fix: F-72424r1034418_fix

Configure the macOS system to disable Siri by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable sending diagnostic and usage data to Apple.

SI-11 - Medium - CCI-001312 - V-268494 - SV-268494r1131212_rule

RMF Control

SI-11

Severity

M

CCI

Version

APPL-15-002021

Vuln IDs

V-268494

Rule IDs

SV-268494r1131212_rule

The ability to submit diagnostic data to Apple must be disabled. The information system must be configured to provide only essential capabilities. Disabling the submission of diagnostic and usage information will mitigate the risk of unwanted data being sent to Apple. Satisfies: SRG-OS-000205-GPOS-00083, SRG-OS-000206-GPOS-00084

Checks: C-72524r1034420_chk

Verify the macOS system is configured to disable sending diagnostic and usage data to Apple with the following command: /usr/bin/osascript -l JavaScript << EOS function run() { let pref1 = $.NSUserDefaults.alloc.initWithSuiteName('com.apple.SubmitDiagInfo')\ .objectForKey('AutoSubmit').js let pref2 = $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowDiagnosticSubmission').js if ( pref1 == false && pref2 == false ){ return("true") } else { return("false") } } EOS If the result is not "true", this is a finding.

Fix: F-72425r1131211_fix

Configure the macOS system to disable sending diagnostic and usage data to Apple by installing the "com.apple.SubmitDiagInfo" configuration profile.

b

The macOS system must disable Remote Apple Events.

AC-3 - Medium - CCI-000213 - V-268495 - SV-268495r1117265_rule

RMF Control

AC-3

Severity

M

CCI

Version

APPL-15-002022

Vuln IDs

V-268495

Rule IDs

SV-268495r1117265_rule

If the system does not require Remote Apple Events, support for Apple Remote Events is nonessential and must be disabled. The information system must be configured to provide only essential capabilities. Disabling Remote Apple Events helps prevent unauthorized connection of devices, transfer of information, and tunneling. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000096-GPOS-00050

Checks: C-72525r1034423_chk

Verify the macOS system is configured to disable Remote Apple Events with the following command: /bin/launchctl print-disabled system | /usr/bin/grep -c '"com.apple.AEServer" => disabled' If the result is not "1", this is a finding.

Fix: F-72426r1034424_fix

Configure the macOS system to disable Remote Apple Events with the following commands: /usr/sbin/systemsetup -setremoteappleevents off /bin/launchctl disable system/com.apple.AEServer NOTE: Systemsetup with -setremoteappleevents flag will fail unless Full Disk Access to systemsetup or its parent process is granted. This requires supervision.

b

The macOS system must disable Apple ID setup during Setup Assistant.

CM-7 - Medium - CCI-000381 - V-268496 - SV-268496r1034428_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002035

Vuln IDs

V-268496

Rule IDs

SV-268496r1034428_rule

The prompt for Apple ID setup during Setup Assistant must be disabled. macOS will automatically prompt new users to set up an Apple ID while they are going through Setup Assistant if this is not disabled. This can mislead new users into thinking they need to create Apple ID accounts upon their first login.

Checks: C-72526r1034426_chk

Verify the macOS system is configured to disable Apple ID setup during Setup Assistant with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.SetupAssistant.managed')\ .objectForKey('SkipCloudSetup').js EOS If the result is not "true", this is a finding.

Fix: F-72427r1034427_fix

Configure the macOS system to disable Apple ID setup during Setup Assistant by installing the "com.apple.SetupAssistant.managed" configuration profile.

b

The macOS system must disable Privacy Setup services during Setup Assistant.

CM-7 - Medium - CCI-000381 - V-268497 - SV-268497r1034431_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002036

Vuln IDs

V-268497

Rule IDs

SV-268497r1034431_rule

The prompt for Privacy Setup services during Setup Assistant must be disabled. Organizations must apply organizationwide configuration settings. The macOS Privacy Setup services prompt guides new users through enabling their own specific privacy settings. This is not essential and, therefore, must be disabled to prevent the risk of individuals electing privacy settings with the potential to override organizationwide settings.

Checks: C-72527r1034429_chk

Verify the macOS system is configured to disable Privacy Setup services during Setup Assistant with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.SetupAssistant.managed')\ .objectForKey('SkipPrivacySetup').js EOS If the result is not "true", this is a finding.

Fix: F-72428r1034430_fix

Configure the macOS system to disable Privacy Setup services during Setup Assistant by installing the "com.apple.SetupAssistant.managed" configuration profile.

b

The macOS system must disable iCloud storage setup during Setup Assistant.

CM-7 - Medium - CCI-000381 - V-268498 - SV-268498r1034434_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002037

Vuln IDs

V-268498

Rule IDs

SV-268498r1034434_rule

The prompt to set up iCloud storage services during Setup Assistant must be disabled. The default behavior of macOS is to prompt new users to set up storage in iCloud. Disabling the iCloud storage setup prompt provides organizations with more control over their data storage.

Checks: C-72528r1034432_chk

Verify the macOS system is configured to disable iCloud storage setup during Setup Assistant with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.SetupAssistant.managed')\ .objectForKey('SkipiCloudStorageSetup').js EOS If the result is not "true", this is a finding.

Fix: F-72429r1034433_fix

Configure the macOS system to disable iCloud storage setup during Setup Assistant by installing the "com.apple.SetupAssistant.managed" configuration profile.

c

The macOS system must disable Trivial File Transfer Protocol (TFTP) service.

IA-5 - High - CCI-000197 - V-268499 - SV-268499r1034437_rule

RMF Control

IA-5

Severity

H

CCI

CCI-000197

Version

APPL-15-002038

Vuln IDs

V-268499

Rule IDs

SV-268499r1034437_rule

If the system does not require TFTP support, it is nonessential and must be disabled. The information system must be configured to provide only essential capabilities. Disabling TFTP helps prevent the unauthorized connection of devices and unauthorized transfer of information. NOTE: TFTP service is disabled at startup by default with macOS. Satisfies: SRG-OS-000074-GPOS-00042, SRG-OS-000080-GPOS-00048

Checks: C-72529r1034435_chk

Verify the macOS system is configured to disable TFTP service with the following command: /bin/launchctl print-disabled system | /usr/bin/grep -c '"com.apple.tftpd" => disabled' If the result is not "1", this is a finding.

Fix: F-72430r1034436_fix

Configure the macOS system to disable TFTP service with the following command: /bin/launchctl disable system/com.apple.tftpd The system may need to be restarted for the update to take effect.

b

The macOS system must disable Siri Setup during Setup Assistant.

CM-7 - Medium - CCI-000381 - V-268500 - SV-268500r1034440_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002039

Vuln IDs

V-268500

Rule IDs

SV-268500r1034440_rule

The prompt for Siri during Setup Assistant must be disabled. Organizations must apply organizationwide configuration settings. The macOS Siri Assistant Setup prompt guides new users through enabling their own specific Siri settings. This is not essential and, therefore, must be disabled to prevent the risk of individuals electing Siri settings with the potential to override organizationwide settings.

Checks: C-72530r1034438_chk

Verify the macOS system is configured to disable Siri Setup during Setup Assistant with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.SetupAssistant.managed')\ .objectForKey('SkipSiriSetup').js EOS If the result is not "true", this is a finding.

Fix: F-72431r1034439_fix

Configure the macOS system to disable Siri Setup during Setup Assistant by installing the "com.apple.SetupAssistant.managed" configuration profile.

b

The macOS system must disable iCloud Keychain Sync.

CM-7 - Medium - CCI-000381 - V-268501 - SV-268501r1034443_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002040

Vuln IDs

V-268501

Rule IDs

SV-268501r1034443_rule

The macOS system's ability to automatically synchronize a user's passwords to their iCloud account must be disabled. Apple's iCloud service does not provide an organization with enough control over the storage and access of data and, therefore, password management and synchronization must be controlled by an organization-approved service.

Checks: C-72531r1034441_chk

Verify the macOS system is configured to disable iCloud Keychain Sync with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudKeychainSync').js EOS If the result is not "false", this is a finding.

Fix: F-72432r1034442_fix

Configure the macOS system to disable iCloud Keychain Sync by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable iCloud Document Sync.

CM-7 - Medium - CCI-000381 - V-268502 - SV-268502r1034446_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002041

Vuln IDs

V-268502

Rule IDs

SV-268502r1034446_rule

The macOS built-in iCloud document synchronization service must be disabled to prevent organizational data from being synchronized to personal or nonapproved storage. Apple's iCloud service does not provide an organization with enough control over the storage and access of data and, therefore, automated document synchronization must be controlled by an organization-approved service.

Checks: C-72532r1034444_chk

Verify the macOS system is configured to disable iCloud Document Sync with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudDocumentSync').js EOS If the result is not "false", this is a finding.

Fix: F-72433r1034445_fix

Configure the macOS system to disable iCloud Document Sync by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable iCloud Bookmarks.

CM-7 - Medium - CCI-000381 - V-268503 - SV-268503r1034449_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002042

Vuln IDs

V-268503

Rule IDs

SV-268503r1034449_rule

The macOS built-in Safari.app bookmark synchronization via the iCloud service must be disabled. Apple's iCloud service does not provide an organization with enough control over the storage and access of data and, therefore, automated bookmark synchronization must be controlled by an organization-approved service.

Checks: C-72533r1034447_chk

Verify the macOS system is configured to disable iCloud Bookmarks with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudBookmarks').js EOS If the result is not "false", this is a finding.

Fix: F-72434r1034448_fix

Configure the macOS system to disable iCloud Bookmarks by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable iCloud Photo Library.

CM-7 - Medium - CCI-000381 - V-268504 - SV-268504r1034452_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002043

Vuln IDs

V-268504

Rule IDs

SV-268504r1034452_rule

The macOS built-in Photos.app connection to Apple's iCloud service must be disabled. Apple's iCloud service does not provide an organization with enough control over the storage and access of data and, therefore, automated photo synchronization must be controlled by an organization-approved service.

Checks: C-72534r1034450_chk

Verify the macOS system is configured to disable the iCloud Photo Library with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudPhotoLibrary').js EOS If the result is not "false", this is a finding.

Fix: F-72435r1034451_fix

Configure the macOS system to disable the iCloud Photo Library by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable Screen Sharing and Apple Remote Desktop.

AC-3 - Medium - CCI-000213 - V-268505 - SV-268505r1117265_rule

RMF Control

AC-3

Severity

M

CCI

Version

APPL-15-002050

Vuln IDs

V-268505

Rule IDs

SV-268505r1117265_rule

Support for both Screen Sharing and Apple Remote Desktop is nonessential and must be disabled. The information system must be configured to provide only essential capabilities. Disabling Screen Sharing and Apple Remote Desktop helps prevent unauthorized connection of devices, transfer of information, and tunneling.

Checks: C-72535r1034453_chk

Verify the macOS system is configured to disable Screen Sharing and Apple Remote Desktop with the following command: /bin/launchctl print-disabled system | /usr/bin/grep -c '"com.apple.screensharing" => disabled' If the result is not "1", this is a finding.

Fix: F-72436r1034454_fix

Configure the macOS system to disable Screen Sharing and Apple Remote Desktop with the following command: /bin/launchctl disable system/com.apple.screensharing The system may need to be restarted for the update to take effect. NOTE: This will apply to the whole system.

b

The macOS system must disable the System Settings pane for Wallet and Apple Pay.

CM-7 - Medium - CCI-000381 - V-268506 - SV-268506r1034458_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002052

Vuln IDs

V-268506

Rule IDs

SV-268506r1034458_rule

The System Settings pane for Wallet and Apple Pay must be disabled. Disabling the System Settings pane prevents the users from configuring Wallet and Apple Pay. Enabling any service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.

Checks: C-72536r1034456_chk

Verify the macOS system is configured to disable the System Settings pane for Wallet and Apple Pay with the following command: /usr/bin/profiles show -output stdout-xml | /usr/bin/xmllint --xpath '//key[text()="DisabledSystemSettings"]/following-sibling::*[1]' - | /usr/bin/grep -c "com.apple.WalletSettingsExtension" If the result is not "1", this is a finding.

Fix: F-72437r1034457_fix

Configure the macOS system to disable the System Settings pane for Wallet and Apple Pay by installing the "com.apple.systempreferences" configuration profile.

b

The macOS system must disable the system settings pane for Siri.

CM-7 - Medium - CCI-000381 - V-268507 - SV-268507r1034461_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002053

Vuln IDs

V-268507

Rule IDs

SV-268507r1034461_rule

The System Settings pane for Siri must be hidden. Hiding the System Settings pane prevents users from configuring Siri. Enabling any service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.

Checks: C-72537r1034459_chk

Verify the macOS system is configured to disable the system settings pane for Siri with the following command: /usr/bin/profiles show -output stdout-xml | /usr/bin/xmllint --xpath '//key[text()="DisabledSystemSettings"]/following-sibling::*[1]' - | /usr/bin/grep -c com.apple.Siri-Settings.extension If the result is not "1", this is a finding.

Fix: F-72438r1034460_fix

Configure the macOS system to disable the system settings pane for Siri by installing the "com.apple.systempreferences" configuration profile.

c

The macOS system must apply gatekeeper settings to block applications from unidentified developers.

High - CCI-003992 - V-268508 - SV-268508r1131219_rule

RMF Control

Severity

H

CCI

CCI-003992

Version

APPL-15-002060

Vuln IDs

V-268508

Rule IDs

SV-268508r1131219_rule

The information system implements cryptographic mechanisms to authenticate software prior to installation. Gatekeeper settings must be configured correctly to allow the system to run only 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 settings on a per-app basis. Gatekeeper is a security feature that ensures that applications must be digitally signed by an Apple-issued certificate to run. Digital signatures allow the macOS to verify that the application has not been modified by a malicious third party.

Checks: C-72538r1131217_chk

Verify the macOS system is configured to apply gatekeeper settings to block applications from unidentified developers with the following commands: /usr/bin/osascript -l JavaScript << EOS function run() { let pref1 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.systempolicy.control')\ .objectForKey('AllowIdentifiedDevelopers')) let pref2 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.systempolicy.control')\ .objectForKey('EnableAssessment')) if ( pref1 == true && pref2 == true ) { return("true") } else { return("false") } } EOS If the result is not "true", this is a finding.

Fix: F-72439r1131218_fix

Configure the macOS system to apply gatekeeper settings to block applications from unidentified developers by installing the "com.apple.systempolicy.control" configuration profile.

c

The macOS system must disable Bluetooth when no approved device is connected.

SC-8 - High - CCI-002418 - V-268509 - SV-268509r1034467_rule

RMF Control

SC-8

Severity

H

CCI

CCI-002418

Version

APPL-15-002062

Vuln IDs

V-268509

Rule IDs

SV-268509r1034467_rule

The macOS system must be configured to disable Bluetooth unless an approved device is connected. [IMPORTANT] ==== Information system security officers (ISSOs) may make the risk-based decision not to disable Bluetooth to maintain necessary functionality, but they are advised to first fully weigh the potential risks posed to their organization. ==== Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000481-GPOS-00481

Checks: C-72539r1034465_chk

Verify the macOS system is configured to disable Bluetooth with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.MCXBluetooth')\ .objectForKey('DisableBluetooth').js EOS If the result is not "true", this is a finding.

Fix: F-72440r1034466_fix

Configure the macOS system to disable Bluetooth by installing the "com.apple.MCXBluetooth" configuration profile.

b

The macOS system must disable the guest account.

CM-5 - Medium - CCI-001813 - V-268510 - SV-268510r1131221_rule

RMF Control

CM-5

Severity

M

CCI

CCI-001813

Version

APPL-15-002063

Vuln IDs

V-268510

Rule IDs

SV-268510r1131221_rule

Guest access must be disabled. Turning off guest access prevents anonymous users from accessing files.

Checks: C-72540r1131220_chk

Verify the macOS system is configured to disable the guest account with the following command: /usr/bin/osascript -l JavaScript << EOS function run() { let pref1 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.MCX')\ .objectForKey('DisableGuestAccount')) let pref2 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.MCX')\ .objectForKey('EnableGuestAccount')) if ( pref1 == true && pref2 == false ) { return("true") } else { return("false") } } EOS If the result is not "true", this is a finding.

Fix: F-72441r1034469_fix

Configure the macOS system to disable the guest account by installing the "com.apple.MCX" configuration profile.

c

The macOS system must enable gatekeeper.

High - CCI-003992 - V-268511 - SV-268511r1131224_rule

RMF Control

Severity

H

CCI

CCI-003992

Version

APPL-15-002064

Vuln IDs

V-268511

Rule IDs

SV-268511r1131224_rule

Gatekeeper must be enabled. Gatekeeper is a security feature that ensures that applications are digitally signed by an Apple-issued certificate before they are permitted to run. Digital signatures allow the macOS host to verify the application has not been modified by a malicious third party. Administrator users will still have the option to override these settings on a case-by-case basis.

Checks: C-72541r1131222_chk

Verify the macOS system is configured to enable gatekeeper with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.systempolicy.control')\ .objectForKey('EnableAssessment').js EOS If the result is not "true", this is a finding.

Fix: F-72442r1131223_fix

Configure the macOS system to enable gatekeeper by installing the "com.apple.systempolicy.control" configuration profile.

c

The macOS system must disable unattended or automatic login to the system.

IA-2 - High - CCI-000764 - V-268512 - SV-268512r1034476_rule

RMF Control

IA-2

Severity

H

CCI

Version

APPL-15-002066

Vuln IDs

V-268512

Rule IDs

SV-268512r1034476_rule

Automatic login must be disabled. When automatic logins are enabled, the default user account is automatically logged on at boot time without prompting the user for a password. Even if the screen is later locked, a malicious user would be able to reboot the computer and find it already logged in. Disabling automatic logins mitigates this risk. Satisfies: SRG-OS-000104-GPOS-00051, SRG-OS-000480-GPOS-00229

Checks: C-72542r1034474_chk

Verify the macOS system is configured to disable unattended or automatic login to the system with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.loginwindow')\ .objectForKey('com.apple.login.mcx.DisableAutoLoginClient').js EOS If the result is not "true", this is a finding.

Fix: F-72443r1034475_fix

Configure the macOS system to disable unattended or automatic login to the system by installing the "com.apple.loginwindow" configuration profile.

b

The macOS system must secure users' home folders.

CM-6 - Medium - CCI-000366 - V-268513 - SV-268513r1131226_rule

RMF Control

CM-6

Severity

M

CCI

Version

APPL-15-002068

Vuln IDs

V-268513

Rule IDs

SV-268513r1131226_rule

The system must be configured to prevent access to other users' home folders. The default behavior of macOS is to allow all valid users access to the top level of every other user's home folder while restricting access only to the Apple default folders within. Satisfies: SRG-OS-000480-GPOS-00230, SRG-OS-000480-GPOS-00228

Checks: C-72543r1034477_chk

Verify the macOS system is configured so that permissions are set correctly on user home directories with the following command: /usr/bin/find /System/Volumes/Data/Users -mindepth 1 -maxdepth 1 -type d ! $ -perm 700 -o -perm 711 $ | /usr/bin/grep -v "Shared" | /usr/bin/grep -v "Guest" | /usr/bin/wc -l | /usr/bin/xargs If the result is not "0", this is a finding.

Fix: F-72444r1131225_fix

Configure the macOS system to set the appropriate permissions for each user on the system with the following command: IFS=$'\n' for userDirs in $( /usr/bin/find /System/Volumes/Data/Users -mindepth 1 -maxdepth 1 -type d ! $ -perm 700 -o -perm 711 $ | /usr/bin/grep -v "Shared" | /usr/bin/grep -v "Guest" ); do /bin/chmod og-rwx "$userDirs" done unset IFS

c

The macOS system must require an administrator password to modify systemwide preferences.

AC-6 - High - CCI-002235 - V-268514 - SV-268514r1131229_rule

RMF Control

AC-6

Severity

H

CCI

CCI-002235

Version

APPL-15-002069

Vuln IDs

V-268514

Rule IDs

SV-268514r1131229_rule

The system must be configured to require an administrator password to modify the systemwide preferences in System Settings. Some Preference Panes in System Settings contain settings that affect the entire system. Requiring a password to unlock these systemwide settings reduces the risk of an unauthorized user modifying system configurations.

Checks: C-72544r1131227_chk

Verify the macOS system is configured to require administrator privileges to modify systemwide settings with the following command: authDBs=("system.preferences" "system.preferences.energysaver" "system.preferences.network" "system.preferences.printing" "system.preferences.sharing" "system.preferences.softwareupdate" "system.preferences.startupdisk" "system.preferences.timemachine") result="1" for section in ${authDBs[@]}; do if [[ $(/usr/bin/security -q authorizationdb read "$section" | /usr/bin/xmllint -xpath 'name(//*[contains(text(), "shared")]/following-sibling::*[1])' -) != "false" ]]; then result="0" fi if [[ $(security -q authorizationdb read "$section" | /usr/bin/xmllint -xpath '//*[contains(text(), "group")]/following-sibling::*[1]/text()' - ) != "admin" ]]; then result="0" fi if [[ $(/usr/bin/security -q authorizationdb read "$section" | /usr/bin/xmllint -xpath 'name(//*[contains(text(), "authenticate-user")]/following-sibling::*[1])' -) != "true" ]]; then result="0" fi if [[ $(/usr/bin/security -q authorizationdb read "$section" | /usr/bin/xmllint -xpath 'name(//*[contains(text(), "session-owner")]/following-sibling::*[1])' -) != "false" ]]; then result="0" fi done echo $result If the result is not "1", this is a finding.

Fix: F-72445r1131228_fix

Configure the macOS system to require administrator privileges to modify systemwide settings with the following command: authDBs=("system.preferences" "system.preferences.energysaver" "system.preferences.network" "system.preferences.printing" "system.preferences.sharing" "system.preferences.softwareupdate" "system.preferences.startupdisk" "system.preferences.timemachine") for section in ${authDBs[@]}; do /usr/bin/security -q authorizationdb read "$section" > "/tmp/$section.plist" class_key_value=$(usr/libexec/PlistBuddy -c "Print :class" "/tmp/$section.plist" 2>&1) if [[ "$class_key_value" == *"Does Not Exist"* ]]; then /usr/libexec/PlistBuddy -c "Add :class string user" "/tmp/$section.plist" else /usr/libexec/PlistBuddy -c "Set :class user" "/tmp/$section.plist" fi key_value=$(/usr/libexec/PlistBuddy -c "Print :shared" "/tmp/$section.plist" 2>&1) if [[ "$key_value" == *"Does Not Exist"* ]]; then /usr/libexec/PlistBuddy -c "Add :shared bool false" "/tmp/$section.plist" else /usr/libexec/PlistBuddy -c "Set :shared false" "/tmp/$section.plist" fi auth_user_key=$(/usr/libexec/PlistBuddy -c "Print :authenticate-user" "/tmp/$section.plist" 2>&1) if [[ "$auth_user_key" == *"Does Not Exist"* ]]; then /usr/libexec/PlistBuddy -c "Add :authenticate-user bool true" "/tmp/$section.plist" else /usr/libexec/PlistBuddy -c "Set :authenticate-user true" "/tmp/$section.plist" fi session_owner_key=$(/usr/libexec/PlistBuddy -c "Print :session-owner" "/tmp/$section.plist" 2>&1) if [[ "$session_owner_key" == *"Does Not Exist"* ]]; then /usr/libexec/PlistBuddy -c "Add :session-owner bool false" "/tmp/$section.plist" else /usr/libexec/PlistBuddy -c "Set :session-owner false" "/tmp/$section.plist" fi group_key=$(usr/libexec/PlistBuddy -c "Print :group" "/tmp/$section.plist" 2>&1) if [[ "$group_key" == *"Does Not Exist"* ]]; then /usr/libexec/PlistBuddy -c "Add :group string admin" "/tmp/$section.plist" else /usr/libexec/PlistBuddy -c "Set :group admin" "/tmp/$section.plist" fi /usr/bin/security -q authorizationdb write "$section" < "/tmp/$section.plist" done

b

The macOS system must disable Airplay Receiver.

CM-7 - Medium - CCI-000381 - V-268515 - SV-268515r1034485_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002080

Vuln IDs

V-268515

Rule IDs

SV-268515r1034485_rule

Airplay Receiver allows users to send content from one Apple device to be displayed on the screen as it is being played from another device. Support for Airplay Receiver is nonessential and must be disabled. The information system must be configured to provide only essential capabilities. Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000300-GPOS-00118

Checks: C-72545r1034483_chk

Verify the macOS system is configured to disable Airplay Receiver with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowAirPlayIncomingRequests').js EOS If the result is not "false", this is a finding.

Fix: F-72446r1034484_fix

Configure the macOS system to disable Airplay Receiver by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable TouchID for unlocking the device.

AC-11 - Medium - CCI-000056 - V-268516 - SV-268516r1034488_rule

RMF Control

AC-11

Severity

M

CCI

Version

APPL-15-002090

Vuln IDs

V-268516

Rule IDs

SV-268516r1034488_rule

TouchID enables the ability to unlock a Mac system with a user's fingerprint. TouchID must be disabled for "Unlocking your Mac" on all macOS devices that are capable of using TouchID. The system must remain locked until the user establishes access using an authorized identification and authentication method. NOTE: TouchID is not an approved biometric authenticator for U.S. Federal Government use as it has not been verified to meet the strength requirements outlined in NIST SP 800-63.

Checks: C-72546r1034486_chk

Verify the macOS system is configured to disable TouchID for unlocking the device with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowFingerprintForUnlock').js EOS If the result is not "false", this is a finding.

Fix: F-72447r1034487_fix

Configure the macOS system to disable TouchID for unlocking the device by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable Media Sharing.

AC-3 - Medium - CCI-000213 - V-268517 - SV-268517r1131231_rule

RMF Control

AC-3

Severity

M

CCI

Version

APPL-15-002100

Vuln IDs

V-268517

Rule IDs

SV-268517r1131231_rule

Media Sharing must be disabled. When Media Sharing is enabled, the computer starts a network listening service that shares the contents of the user's music collection with other users in the same subnet. The information system must be configured to provide only essential capabilities. Disabling Media Sharing helps prevent the unauthorized connection of devices and unauthorized transfer of information. Disabling Media Sharing mitigates this risk. Note: The Media Sharing preference panel will still allow "Home Sharing" and "Share media with guests" to be checked, but the service will not be enabled.

Checks: C-72547r1131230_chk

Verify the macOS system is configured to disable Media Sharing with the following commands: /usr/bin/osascript -l JavaScript << EOS function run() { let pref1 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowMediaSharing')) let pref2 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowMediaSharingModification')) if ( pref1 == false && pref2 == false ) { return("true") } else { return("false") } } EOS If the result is not "true", this is a finding.

Fix: F-72448r1034490_fix

Configure the macOS system to disable Media Sharing by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable Bluetooth Sharing.

AC-3 - Medium - CCI-000213 - V-268518 - SV-268518r1131234_rule

RMF Control

AC-3

Severity

M

CCI

Version

APPL-15-002110

Vuln IDs

V-268518

Rule IDs

SV-268518r1131234_rule

Bluetooth Sharing must be disabled. Bluetooth Sharing allows users to wirelessly transmit files between the macOS and Bluetooth-enabled devices, including personally owned cellphones and tablets. A malicious user might introduce viruses or malware onto the system or extract sensitive files via Bluetooth Sharing. When Bluetooth Sharing is disabled, this risk is mitigated. [NOTE] ==== The check and fix are for the currently logged in user. To get the currently logged in user, run the following. [source,bash] ---- CURRENT_USER=$( /usr/sbin/scutil

Checks: C-72548r1131232_chk

Verify the macOS system is configured to disable Bluetooth sharing with the following commands: CURRENT_USER=$( /usr/sbin/scutil <<< "show State:/Users/ConsoleUser" | /usr/bin/awk '/Name :/ && ! /loginwindow/ { print $3 }' ) /usr/bin/sudo -u "$CURRENT_USER" /usr/bin/defaults -currentHost read com.apple.Bluetooth PrefKeyServicesEnabled If the result is not "0", this is a finding.

Fix: F-72449r1131233_fix

Configure the macOS system to disable Bluetooth sharing with the following commands: CURRENT_USER=$( /usr/sbin/scutil <<< "show State:/Users/ConsoleUser" | /usr/bin/awk '/Name :/ && ! /loginwindow/ { print $3 }' ) /usr/bin/sudo -u "$CURRENT_USER" /usr/bin/defaults -currentHost write com.apple.Bluetooth PrefKeyServicesEnabled -bool false

b

The macOS system must disable AppleID and internet Account Modification.

CM-7 - Medium - CCI-000381 - V-268519 - SV-268519r1034497_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002120

Vuln IDs

V-268519

Rule IDs

SV-268519r1034497_rule

The system must disable Account Modification. Account Modification includes adding or modifying internet accounts in Apple Mail, Calendar, or Contacts in the Internet Account System Setting Pane or the AppleID System Setting Pane. This prevents the addition of unauthorized accounts. [IMPORTANT] ==== Some organizations may allow the use and configuration of the built-in Mail.app, Calendar.app, and Contacts.app for organizational communication. Information system security officers (ISSOs) may make the risk-based decision not to disable the Internet Accounts System Preference pane to avoid losing this functionality, but they are advised to first fully weigh the potential risks posed to their organization. ====

Checks: C-72549r1034495_chk

Verify the macOS system is configured to disable account modification with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowAccountModification').js EOS If the result is not "false", this is a finding.

Fix: F-72450r1034496_fix

Configure the macOS system to disable Account Modification by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable CD/DVD Sharing.

CM-7 - Medium - CCI-000381 - V-268520 - SV-268520r1034500_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002130

Vuln IDs

V-268520

Rule IDs

SV-268520r1034500_rule

CD/DVD Sharing must be disabled.

Checks: C-72550r1034498_chk

Verify the macOS system is configured to disable CD/DVD Sharing with the following command: /usr/bin/pgrep -q ODSAgent; /bin/echo $? If the result is not "1", this is a finding.

Fix: F-72451r1034499_fix

Configure the macOS system to disable CD/DVD Sharing with the following command: /bin/launchctl unload /System/Library/LaunchDaemons/com.apple.ODSAgent.plist

b

The macOS system must disable Content Caching service.

CM-7 - Medium - CCI-000381 - V-268521 - SV-268521r1034503_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002140

Vuln IDs

V-268521

Rule IDs

SV-268521r1034503_rule

Content Caching must be disabled. Content Caching is a macOS service that helps reduce internet data usage and speed up software installation on Mac computers. It is not recommended for devices furnished to employees to act as a caching server.

Checks: C-72551r1034501_chk

Verify the macOS system is configured to disable Content Caching service with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowContentCaching').js EOS If the result is not "false", this is a finding.

Fix: F-72452r1034502_fix

Configure the macOS system to disable Content Caching service by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable iCloud Desktop and Document folder sync.

CM-7 - Medium - CCI-000381 - V-268522 - SV-268522r1034506_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002150

Vuln IDs

V-268522

Rule IDs

SV-268522r1034506_rule

The macOS system's ability to automatically synchronize a user's Desktop and Documents folder to their iCloud Drive must be disabled. Apple's iCloud service does not provide an organization with enough control over the storage and access of data and, therefore, automated file synchronization must be controlled by an organization-approved service.

Checks: C-72552r1034504_chk

Verify the macOS system is configured to disable iCloud Desktop and Document folder synchronization with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudDesktopAndDocuments').js EOS If the result is not "false", this is a finding.

Fix: F-72453r1034505_fix

Configure the macOS system to disable iCloud Desktop and Document folder synchronization by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable iCloud Game Center.

CM-7 - Medium - CCI-000381 - V-268523 - SV-268523r1034509_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002160

Vuln IDs

V-268523

Rule IDs

SV-268523r1034509_rule

This works only with supervised devices (mobile device management [MDM]) and allows to disable Apple Game Center. The rationale is that Game Center is using Apple ID and will share data on AppleID-based services; therefore, Game Center must be disabled. This setting also prohibits the functionality of adding friends to Game Center.

Checks: C-72553r1034507_chk

Verify the macOS system is configured to disable iCloud Game Center with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowGameCenter').js EOS If the result is not "false", this is a finding.

Fix: F-72454r1034508_fix

Configure the macOS system to disable iCloud Game Center by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable iCloud Private Relay.

CM-7 - Medium - CCI-000381 - V-268524 - SV-268524r1034512_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002170

Vuln IDs

V-268524

Rule IDs

SV-268524r1034512_rule

Enterprise networks may be required to audit all network traffic by policy; therefore, iCloud Private Relay must be disabled. Network administrators can also prevent the use of this feature by blocking DNS resolution of mask.icloud.com and mask-h2.icloud.com.

Checks: C-72554r1034510_chk

Verify the macOS system is configured to disable the iCloud Private Relay with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudPrivateRelay').js EOS If the result is not "false", this is a finding.

Fix: F-72455r1034511_fix

Configure the macOS system to disable the iCloud Private Relay by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable Find My service.

CM-7 - Medium - CCI-000381 - V-268525 - SV-268525r1131237_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002180

Vuln IDs

V-268525

Rule IDs

SV-268525r1131237_rule

The Find My service must be disabled. A Mobile Device Management (MDM) solution must be used to carry out remote locking and wiping instead of Apple's Find My service. Apple's Find My service uses a personal AppleID for authentication. Organizations must rely on MDM solutions, which have much more secure authentication requirements, to perform remote lock and remote wipe.

Checks: C-72555r1131235_chk

Verify the macOS system is configured to disable Find My service with the following command: /usr/bin/osascript -l JavaScript << EOS function run() { let pref1 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowFindMyDevice')) let pref2 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowFindMyFriends')) let pref3 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.icloud.managed')\ .objectForKey('DisableFMMiCloudSetting')) if ( pref1 == false && pref2 == false && pref3 == true ) { return("true") } else { return("false") } } EOS If the result is not "true", this is a finding.

Fix: F-72456r1131236_fix

Configure the macOS system to disable Find My service by installing the "com.apple.applicationaccess" and "com.apple.icloud.managed" configuration profiles.

b

The macOS system must disable Personalized Advertising.

CM-7 - Medium - CCI-000381 - V-268526 - SV-268526r1034518_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002200

Vuln IDs

V-268526

Rule IDs

SV-268526r1034518_rule

Ad tracking and targeted ads must be disabled. The information system must be configured to provide only essential capabilities. Disabling ad tracking ensures that applications and advertisers are unable to track users' interests and deliver targeted advertisements.

Checks: C-72556r1034516_chk

Verify the macOS system is configured to disable Personalized Advertising with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowApplePersonalizedAdvertising').js EOS If the result is not "false", this is a finding.

Fix: F-72457r1034517_fix

Configure the macOS system to disable Personalized Advertising by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable sending Siri and Dictation information to Apple.

CM-7 - Medium - CCI-000381 - V-268527 - SV-268527r1034521_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002210

Vuln IDs

V-268527

Rule IDs

SV-268527r1034521_rule

The ability for Apple to store and review audio of Siri and Dictation interactions must be disabled. The information system must be configured to provide only essential capabilities. Disabling the submission of Siri and Dictation information will mitigate the risk of unwanted data being sent to Apple.

Checks: C-72557r1034519_chk

Verify the macOS system is configured to disable sending Siri and Dictation information to Apple with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.assistant.support')\ .objectForKey('Siri Data Sharing Opt-In Status').js EOS If the result is not "2", this is a finding.

Fix: F-72458r1034520_fix

Configure the macOS system to disable sending Siri and Dictation information to Apple by installing the "com.apple.assistant.support" configuration profile.

b

The macOS system must enforce On Device Dictation.

CM-7 - Medium - CCI-000381 - V-268528 - SV-268528r1034524_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002220

Vuln IDs

V-268528

Rule IDs

SV-268528r1034524_rule

Dictation must be restricted to On Device Only to prevent potential data exfiltration. The information system must be configured to provide only essential capabilities.

Checks: C-72558r1034522_chk

For Intel-based systems, this is not applicable. Verify the macOS system is configured to enforce On Device Only Dictation with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('forceOnDeviceOnlyDictation').js EOS If the result is not "true", this is a finding.

Fix: F-72459r1034523_fix

Configure the macOS system to enforce On Device Only Dictation by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable Dictation.

CM-7 - Medium - CCI-000381 - V-268529 - SV-268529r1034527_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002230

Vuln IDs

V-268529

Rule IDs

SV-268529r1034527_rule

Dictation must be disabled on Intel-based Macs as the feature On Device Dictation is only available on Apple Silicon devices.

Checks: C-72559r1034525_chk

For Apple Silicon-based systems, this is not applicable. Verify the macOS system is configured to disable Dictation with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowDictation').js EOS If the result is not "false", this is a finding.

Fix: F-72460r1034526_fix

Configure the macOS system to disable Dictation by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable Printer Sharing.

CM-7 - Medium - CCI-000381 - V-268530 - SV-268530r1034530_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002240

Vuln IDs

V-268530

Rule IDs

SV-268530r1034530_rule

Printer Sharing must be disabled.

Checks: C-72560r1034528_chk

Verify the macOS system is configured to disable Printer Sharing with the following command: /usr/sbin/cupsctl | /usr/bin/grep -c "_share_printers=0" If the result is not "1", this is a finding.

Fix: F-72461r1034529_fix

Configure the macOS system to disable Printer Sharing with the following commands: /usr/sbin/cupsctl --no-share-printers /usr/bin/lpstat -p | awk '{print $2}'| /usr/bin/xargs -I{} lpadmin -p {} -o printer-is-shared=false

b

The macOS system must disable Remote Management.

CM-7 - Medium - CCI-000381 - V-268531 - SV-268531r1034533_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002250

Vuln IDs

V-268531

Rule IDs

SV-268531r1034533_rule

Remote Management must be disabled.

Checks: C-72561r1034531_chk

Verify the macOS system is configured to disable Remote Management with the following command: /usr/libexec/mdmclient QuerySecurityInfo | /usr/bin/grep -c "RemoteDesktopEnabled = 0" If the result is not "1", this is a finding.

Fix: F-72462r1034532_fix

Configure the macOS system to disable Remote Management with the following commands: /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -deactivate -stop

b

The macOS system must disable the Bluetooth System Settings pane.

CM-7 - Medium - CCI-000381 - V-268532 - SV-268532r1034536_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002260

Vuln IDs

V-268532

Rule IDs

SV-268532r1034536_rule

The Bluetooth System Setting pane must be disabled to prevent access to the Bluetooth configuration.

Checks: C-72562r1034534_chk

Verify the macOS system is configured to disable the Bluetooth System Settings pane with the following command: /usr/bin/profiles show -output stdout-xml | /usr/bin/xmllint --xpath '//key[text()="DisabledSystemSettings"]/following-sibling::*[1]' - | /usr/bin/grep -c com.apple.BluetoothSettings If the result is not "1", this is a finding.

Fix: F-72463r1034535_fix

Configure the macOS system to disable the Bluetooth System Settings pane by installing the "com.apple.systempreferences" configuration profiles.

b

The macOS system must disable the iCloud Freeform services.

CM-7 - Medium - CCI-000381 - V-268533 - SV-268533r1034539_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002270

Vuln IDs

V-268533

Rule IDs

SV-268533r1034539_rule

The macOS built-in Freeform.app connection to Apple's iCloud service must be disabled. Enabling any service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.

Checks: C-72563r1034537_chk

Verify the macOS system is configured to disable iCloud Freeform services with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudFreeform').js EOS If the result is not "false", this is a finding.

Fix: F-72464r1034538_fix

Configure the macOS system to disable iCloud Freeform services by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must issue or obtain public key certificates from an approved service provider.

SC-23 - Medium - CCI-002470 - V-268534 - SV-268534r1034542_rule

RMF Control

SC-23

Severity

M

CCI

CCI-002470

Version

APPL-15-003001

Vuln IDs

V-268534

Rule IDs

SV-268534r1034542_rule

The organization must issue or obtain public key certificates from an organization-approved service provider and ensure only approved trust anchors are in the System Keychain. Satisfies: SRG-OS-000403-GPOS-00182, SRG-OS-000775-GPOS-00230

Checks: C-72564r1034540_chk

Verify the macOS system is configured to issue or obtain public key certificates from an approved service provider with the following command: /usr/bin/security dump-keychain /Library/Keychains/System.keychain | /usr/bin/awk -F'"' '/labl/ {print $4}' If the result does not contain a list of approved certificate authorities, this is a finding.

Fix: F-72465r1034541_fix

Configure the macOS system to issue or obtain public key certificates from an approved service provider by obtaining the approved certificates from the appropriate authority and install them to the System Keychain.

b

The macOS system must require that passwords contain a minimum of one numeric character.

Medium - CCI-004066 - V-268535 - SV-268535r1034545_rule

RMF Control

Severity

M

CCI

Version

APPL-15-003007

Vuln IDs

V-268535

Rule IDs

SV-268535r1034545_rule

The macOS must be configured to require at least one numeric character be used when a password is created. This rule enforces password complexity by requiring users to set passwords that are less vulnerable to malicious users. NOTE: The guidance for password-based authentication in NIST 800-53 (Rev 5) and NIST 800-63B states that complexity rules should be organizationally defined. The values defined are based on common complexity values, but each organization may define its own password complexity rules.

Checks: C-72565r1034543_chk

Verify the macOS system is configured to require that passwords contain a minimum of one numeric character with the following command: /usr/bin/pwpolicy -getaccountpolicies 2> /dev/null | /usr/bin/tail +2 | /usr/bin/xmllint --xpath '//dict/key[text()="policyIdentifier"]/following-sibling::*[1]/text()' - | /usr/bin/grep "requireAlphanumeric" -c If the result is not "1", this is a finding.

Fix: F-72466r1034544_fix

Configure the macOS system to require that passwords contain a minimum of one numeric character by installing the "com.apple.mobiledevice.passwordpolicy" configuration profile.

b

The macOS system must restrict maximum password lifetime to 60 days.

Medium - CCI-004066 - V-268536 - SV-268536r1038967_rule

RMF Control

Severity

M

CCI

Version

APPL-15-003008

Vuln IDs

V-268536

Rule IDs

SV-268536r1038967_rule

The macOS must be configured to enforce a maximum password lifetime limit of at least 60 days. This rule ensures that users are forced to change their passwords frequently enough to prevent malicious users from gaining and maintaining access to the system. NOTE: The guidance for password-based authentication in NIST 800-53 (Rev 5) and NIST 800-63B states that complexity rules should be organizationally defined. The values defined are based on common complexity values, but each organization may define its own password complexity rules.

Checks: C-72566r1034546_chk

Verify the macOS system is configured to restrict maximum password lifetime to 60 days with the following command: /usr/bin/pwpolicy -getaccountpolicies 2> /dev/null | /usr/bin/tail +2 | /usr/bin/xmllint --xpath '//dict/key[text()="policyAttributeExpiresEveryNDays"]/following-sibling::*[1]/text()' - If the result is not "60" or less, this is a finding.

Fix: F-72467r1034547_fix

Configure the macOS system to restrict maximum password lifetime to 60 days by installing the "com.apple.mobiledevice.passwordpolicy" configuration profile.

b

The macOS system must require a minimum password length of 14 characters.

Medium - CCI-004066 - V-268537 - SV-268537r1034551_rule

RMF Control

Severity

M

CCI

Version

APPL-15-003010

Vuln IDs

V-268537

Rule IDs

SV-268537r1034551_rule

The macOS must be configured to require that a minimum of 14 characters be used when a password is created. This rule enforces password complexity by requiring users to set passwords that are less vulnerable to malicious users. NOTE: The guidance for password-based authentication in NIST 800-53 (Rev 5) and NIST 800-63B states that complexity rules should be organizationally defined. The values defined are based on common complexity values, but each organization may define its own password complexity rules.

Checks: C-72567r1034549_chk

Verify the macOS system is configured to enforce a minimum 14-character password length with the following command: /usr/bin/pwpolicy -getaccountpolicies 2> /dev/null | /usr/bin/tail +2 | /usr/bin/xmllint --xpath 'boolean(//*[contains(text(),"policyAttributePassword matches '\''.{14,}'\''")])' - If the result is not "true", this is a finding.

Fix: F-72468r1034550_fix

Configure the macOS system to enforce a 14-character password length by installing the "com.apple.mobiledevice.passwordpolicy" configuration profile.

b

The macOS system must require that passwords contain a minimum of one special character.

Medium - CCI-004066 - V-268538 - SV-268538r1131239_rule

RMF Control

Severity

M

CCI

Version

APPL-15-003011

Vuln IDs

V-268538

Rule IDs

SV-268538r1131239_rule

The macOS must be configured to require that at least one special character be used when a password is created. Special characters are characters that are not alphanumeric. Examples include: ~ ! @ # $ % ^ *. This rule enforces password complexity by requiring users to set passwords that are less vulnerable to malicious users. Note: The guidance for password-based authentication in NIST 800-53 (Rev 5) and NIST 800-63B states that complexity rules must be organizationally defined. The values defined are based on common complexity values, but each organization may define its own password complexity rules.

Checks: C-72568r1131238_chk

Verify the macOS system is configured to require passwords contain a minimum of one special character with the following command: /usr/bin/pwpolicy -getaccountpolicies 2>/dev/null | /usr/bin/tail -n +2 | /usr/bin/xmllint --xpath "//string[contains(text(), \"policyAttributePassword matches '(.*[^a-zA-Z0-9].*){\")]" - 2>/dev/null | /usr/bin/awk -F"{|}" '{if ($2 >= 1) {print "true"} else {print "false"}}' If the result is not "true", this is a finding.

Fix: F-72469r1034553_fix

Configure the macOS system to require that passwords contain a minimum of one special character by installing the "com.apple.mobiledevice.passwordpolicy" configuration profile.

b

The macOS system must disable password hints.

IA-6 - Medium - CCI-000206 - V-268539 - SV-268539r1034557_rule

RMF Control

IA-6

Severity

M

CCI

CCI-000206

Version

APPL-15-003012

Vuln IDs

V-268539

Rule IDs

SV-268539r1034557_rule

Password hints must be disabled. Password hints leak information about passwords that are currently in use and can lead to loss of confidentiality.

Checks: C-72569r1034555_chk

Verify the macOS system is configured to disable password hints with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.loginwindow')\ .objectForKey('RetriesUntilHint').js EOS If the result is not "0", this is a finding.

Fix: F-72470r1034556_fix

Configure the macOS system to disable password hints by installing the "com.apple.loginwindow" configuration profile.

b

The macOS system must enable firmware password.

CM-6 - Medium - CCI-000366 - V-268540 - SV-268540r1034560_rule

RMF Control

CM-6

Severity

M

CCI

Version

APPL-15-003013

Vuln IDs

V-268540

Rule IDs

SV-268540r1034560_rule

A firmware password must be enabled and set. Single user mode, recovery mode, the Startup Manager, and several other tools are available on macOS by holding the "Option" key down during startup. Setting a firmware password restricts access to these tools. To set a firmware passcode, use the following command: [source,bash] ---- /usr/sbin/firmwarepasswd -setpasswd ---- NOTE: If the firmware password or passcode is forgotten, the only way to reset the forgotten password is through the use of a machine-specific binary generated and provided by Apple. Users must schedule a support call and provide proof of purchase before the firmware binary will be generated. NOTE: Firmware passwords are not supported on Apple Silicon devices. This rule is only applicable to Intel devices.

Checks: C-72570r1034558_chk

For Apple Silicon systems, this is not applicable. Verify the macOS system is configured with a firmware password with the following command: /usr/sbin/firmwarepasswd -check | /usr/bin/grep -c "Password Enabled: Yes" If the result is not "1", this is a finding.

Fix: F-72471r1034559_fix

Configure the macOS system with a firmware password with the following command: /usr/sbin/firmwarepasswd -setpasswd NOTE: If firmware password or passcode is forgotten, the only way to reset the forgotten password is through a machine-specific binary generated and provided by Apple. Users must schedule a support call and provide proof of purchase before the firmware binary will be generated.

b

The macOS system must remove password hints from user accounts.

IA-6 - Medium - CCI-000206 - V-268541 - SV-268541r1131242_rule

RMF Control

IA-6

Severity

M

CCI

CCI-000206

Version

APPL-15-003014

Vuln IDs

V-268541

Rule IDs

SV-268541r1131242_rule

User accounts must not contain password hints. Password hints leak information about passwords in use and can lead to loss of confidentiality.

Checks: C-72571r1131240_chk

Verify the macOS system is configured to remove password hints from user accounts with the following command: HINT=$(/usr/bin/dscl . -list /Users hint | /usr/bin/awk '{ print $2 }') if [ -z "$HINT" ]; then echo "PASS" else echo "FAIL" fi If the result is not "PASS", this is a finding.

Fix: F-72472r1131241_fix

Configure the macOS system to remove password hints from user accounts with the following command: for u in $(/usr/bin/dscl . -list /Users UniqueID | /usr/bin/awk '$2 > 500 {print $1}'); do /usr/bin/dscl . -delete /Users/$u hint done

b

The macOS system must enforce smart card authentication.

IA-5 - Medium - CCI-000186 - V-268542 - SV-268542r1034566_rule

RMF Control

IA-5

Severity

M

CCI

CCI-000186

Version

APPL-15-003020

Vuln IDs

V-268542

Rule IDs

SV-268542r1034566_rule

Smart card authentication must be enforced. The use of smart card credentials facilitates standardization and reduces the risk of unauthorized access. When enforceSmartCard is set to "true", the smart card must be used for login, authorization, and unlocking the screen saver. CAUTION: enforceSmartCard will apply to the whole system. No users will be able to log in with their password unless the profile is removed or a user is exempt from smart card enforcement. NOTE: enforceSmartcard requires allowSmartcard to be set to "true" to work. Satisfies: SRG-OS-000067-GPOS-00035, SRG-OS-000105-GPOS-00052, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000108-GPOS-00055, SRG-OS-000112-GPOS-00057, SRG-OS-000375-GPOS-00160, SRG-OS-000376-GPOS-00161, SRG-OS-000705-GPOS-00150

Checks: C-72572r1034564_chk

Verify the macOS system is configured to enforce multifactor authentication with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.security.smartcard')\ .objectForKey('enforceSmartCard').js EOS If the result is not "true", this is a finding.

Fix: F-72473r1034565_fix

Configure the macOS system to enforce multifactor authentication by installing the "com.apple.security.smartcard" configuration profile. NOTE: To ensure continued access to the operating system, consult the supplemental guidance provided with the STIG before applying the configuration profile.

b

The macOS system must allow smart card authentication.

IA-5 - Medium - CCI-000187 - V-268543 - SV-268543r1034569_rule

RMF Control

IA-5

Severity

M

CCI

CCI-000187

Version

APPL-15-003030

Vuln IDs

V-268543

Rule IDs

SV-268543r1034569_rule

Smart card authentication must be allowed. The use of smart card credentials facilitates standardization and reduces the risk of unauthorized access. When enabled, the smart card can be used for login, authorization, and screen saver unlocking. Satisfies: SRG-OS-000068-GPOS-00036, SRG-OS-000105-GPOS-00052, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000108-GPOS-00055, SRG-OS-000112-GPOS-00057, SRG-OS-000376-GPOS-00161

Checks: C-72573r1034567_chk

Verify the macOS system is configured to allow smart card authentication with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.security.smartcard')\ .objectForKey('allowSmartCard').js EOS If the result is not "true", this is a finding.

Fix: F-72474r1034568_fix

Configure the macOS system to enforce multifactor authentication by installing the "com.apple.security.smartcard" configuration profile. NOTE: To ensure continued access to the operating system, consult the supplemental guidance provided with the STIG before applying the configuration profile.

b

The macOS system must enforce multifactor authentication for login.

IA-2 - Medium - CCI-000765 - V-268544 - SV-268544r1034572_rule

RMF Control

IA-2

Severity

M

CCI

CCI-000765

Version

APPL-15-003050

Vuln IDs

V-268544

Rule IDs

SV-268544r1034572_rule

The system must be configured to enforce multifactor authentication. All users must go through multifactor authentication to prevent unauthenticated access and potential compromise to the system. IMPORTANT: Modification of Pluggable Authentication Modules (PAM) now requires user authorization or use of a Privacy Preferences Policy Control (PPPC) profile from MDM that authorizes modifying system administrator files or full disk access. NOTE: /etc/pam.d/login will be automatically modified to its original state following any update or major upgrade to the operating system. Satisfies: SRG-OS-000105-GPOS-00052, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000108-GPOS-00055, SRG-OS-000112-GPOS-00057, SRG-OS-000705-GPOS-00150

Checks: C-72574r1034570_chk

Verify the macOS system is configured to enforce multifactor authentication for login with the following command: /usr/bin/grep -Ec '^(auth\s+sufficient\s+pam_smartcard.so|auth\s+required\s+pam_deny.so)' /etc/pam.d/login If the result is not "2", this is a finding.

Fix: F-72475r1034571_fix

Configure the macOS system to enforce multifactor authentication for login with the following commands: /bin/cat > /etc/pam.d/login << LOGIN_END # login: auth account password session auth sufficient pam_smartcard.so auth optional pam_krb5.so use_kcminit auth optional pam_ntlm.so try_first_pass auth optional pam_mount.so try_first_pass auth required pam_opendirectory.so try_first_pass auth required pam_deny.so account required pam_nologin.so account required pam_opendirectory.so password required pam_opendirectory.so session required pam_launchd.so session required pam_uwtmp.so session optional pam_mount.so LOGIN_END /bin/chmod 644 /etc/pam.d/login /usr/sbin/chown root:wheel /etc/pam.d/login

b

The macOS system must enforce multifactor authentication for the su command.

IA-2 - Medium - CCI-000765 - V-268545 - SV-268545r1034575_rule

RMF Control

IA-2

Severity

M

CCI

CCI-000765

Version

APPL-15-003051

Vuln IDs

V-268545

Rule IDs

SV-268545r1034575_rule

The system must be configured such that, when the su command is used, multifactor authentication is enforced. All users must go through multifactor authentication to prevent unauthenticated access and potential compromise to the system. IMPORTANT: Modification of Pluggable Authentication Modules (PAM) now requires user authorization or use of a Privacy Preferences Policy Control (PPPC) profile from MDM that authorizes modifying system administrator files or full disk access. NOTE: /etc/pam.d/su will be automatically modified to its original state following any update or major upgrade to the operating system. Satisfies: SRG-OS-000105-GPOS-00052, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000108-GPOS-00055, SRG-OS-000112-GPOS-00057, SRG-OS-000705-GPOS-00150

Checks: C-72575r1034573_chk

Verify the macOS system is configured to enforce multifactor authentication for the su command with the following command: /usr/bin/grep -Ec '^(auth\s+sufficient\s+pam_smartcard.so|auth\s+required\s+pam_rootok.so)' /etc/pam.d/su If the result is not "2", this is a finding.

Fix: F-72476r1034574_fix

Configure the macOS system to enforce multifactor authentication for the su command with the following commands: /bin/cat > /etc/pam.d/su << SU_END # su: auth account password session auth sufficient pam_smartcard.so auth required pam_rootok.so auth required pam_group.so no_warn group=admin,wheel ruser root_only fail_safe account required pam_permit.so account required pam_opendirectory.so no_check_shell password required pam_opendirectory.so session required pam_launchd.so SU_END # Fix new file ownership and permissions /bin/chmod 644 /etc/pam.d/su /usr/sbin/chown root:wheel /etc/pam.d/su

b

The macOS system must enforce multifactor authentication for privilege escalation through the sudo command.

IA-2 - Medium - CCI-000765 - V-268546 - SV-268546r1034578_rule

RMF Control

IA-2

Severity

M

CCI

CCI-000765

Version

APPL-15-003052

Vuln IDs

V-268546

Rule IDs

SV-268546r1034578_rule

The system must be configured to enforce multifactor authentication when the sudo command is used to elevate privilege. All users must go through multifactor authentication to prevent unauthenticated access and potential compromise to the system. IMPORTANT: Modification of Pluggable Authentication Modules (PAM) now requires user authorization, or use of a Privacy Preferences Policy Control (PPPC) profile from MDM that authorizes modifying system administrator files or full disk access. NOTE: /etc/pam.d/sudo will be automatically modified to its original state following any update or major upgrade to the operating system. Satisfies: SRG-OS-000105-GPOS-00052, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000108-GPOS-00055, SRG-OS-000112-GPOS-00057, SRG-OS-000705-GPOS-00150

Checks: C-72576r1034576_chk

Verify the macOS system is configured to enforce multifactor authentication for privilege escalation through the sudo command with the following command: /usr/bin/grep -Ec '^(auth\s+sufficient\s+pam_smartcard.so|auth\s+required\s+pam_deny.so)' /etc/pam.d/sudo If the result is not "2", this is a finding.

Fix: F-72477r1034577_fix

Configure the macOS system to enforce multifactor authentication for privilege escalation through the sudo command with the following commands: /bin/cat > /etc/pam.d/sudo << SUDO_END # sudo: auth account password session auth sufficient pam_smartcard.so auth required pam_opendirectory.so auth required pam_deny.so account required pam_permit.so password required pam_deny.so session required pam_permit.so SUDO_END /bin/chmod 444 /etc/pam.d/sudo /usr/sbin/chown root:wheel /etc/pam.d/sudo

b

The macOS system must require that passwords contain a minimum of one lowercase character and one uppercase character.

Medium - CCI-004066 - V-268547 - SV-268547r1034581_rule

RMF Control

Severity

M

CCI

Version

APPL-15-003060

Vuln IDs

V-268547

Rule IDs

SV-268547r1034581_rule

The macOS must be configured to require that at least one lowercase character and one uppercase character be used when a password is created. This rule enforces password complexity by requiring users to set passwords that are less vulnerable to malicious users. NOTE: The guidance for password-based authentication in NIST 800-53 (Rev 5) and NIST 800-63B states that complexity rules should be organizationally defined. The values defined are based on common complexity values, but each organization may define its own password complexity rules. NOTE: The configuration profile generated must be installed from a Mobile Device Management (MDM) server. Satisfies: SRG-OS-000069-GPOS-00037, SRG-OS-000070-GPOS-00038, SRG-OS-000730-GPOS-00190

Checks: C-72577r1034579_chk

Verify the macOS system is configured to require that passwords contain a minimum of one lowercase character and one uppercase character with the following command: /usr/bin/pwpolicy -getaccountpolicies 2> /dev/null | /usr/bin/tail +2 | /usr/bin/xmllint --xpath 'boolean(//*[contains(text(),"policyAttributePassword matches '\''^(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9]).*$'\''")])' - If the result is not "true", this is a finding.

Fix: F-72478r1034580_fix

Configure the macOS system to require at least one lowercase character and one uppercase character in password complexity by installing the "com.apple.mobiledevice.passwordpolicy" configuration profile.

b

The macOS system must set minimum password lifetime to 24 hours.

Medium - CCI-004066 - V-268548 - SV-268548r1131244_rule

RMF Control

Severity

M

CCI

Version

APPL-15-003070

Vuln IDs

V-268548

Rule IDs

SV-268548r1131244_rule

The macOS must be configured to enforce a minimum password lifetime limit of 24 hours. This rule discourages users from cycling through their previous passwords to get back to a preferred one. Note: The guidance for password-based authentication in NIST 800-53 (Rev 5) and NIST 800-63B states that complexity rules must be organizationally defined. The values defined are based on common complexity values, but each organization may define its own password complexity rules.

Checks: C-72578r1034582_chk

Verify the macOS system is configured to set minimum password lifetime to 24 hours with the following command: /usr/bin/pwpolicy -getaccountpolicies 2> /dev/null | /usr/bin/tail +2 | /usr/bin/xmllint --xpath '//dict/key[text()="policyAttributeMinimumLifetimeHours"]/following-sibling::integer[1]/text()' - | /usr/bin/awk '{ if ($1 >= 24 ) {print "yes"} else {print "no"}}' If the result is not "yes", this is a finding.

Fix: F-72479r1131243_fix

Configure the macOS system to set minimum password lifetime to 24 hours. This setting may be enforced using local policy. To set local policy to require a minimum password lifetime, edit the current password policy to contain the following <dict> within the "policyCategoryPasswordContent": [source,xml] ---- <dict> <key>policyContent</key> <string>policyAttributeLastPasswordChangeTime < policyAttributeCurrentTime - (policyAttributeMinimumLifetimeHours * 60 * 60)</string> <key>policyIdentifier</key> <string>Minimum Password Lifetime</string> <key>policyParameters</key> <dict> <key>policyAttributeMinimumLifetimeHours</key> <integer>24</integer> </dict> </dict> ---- After saving the file and exiting to the command prompt, run the following command to load the new policy file, substituting the path to the file in place of "$pwpolicy_file". [source,bash] ---- /usr/bin/pwpolicy setaccountpolicies $pwpolicy_file ----

b

The macOS system must disable accounts after 35 days of inactivity.

Medium - CCI-003627 - V-268549 - SV-268549r1131246_rule

RMF Control

Severity

M

CCI

CCI-003627

Version

APPL-15-003080

Vuln IDs

V-268549

Rule IDs

SV-268549r1131246_rule

The macOS must be configured to disable accounts after 35 days of inactivity. This rule prevents malicious users from employing unused accounts to gain access to the system while avoiding detection. Satisfies: SRG-OS-000118-GPOS-00060, SRG-OS-000590-GPOS-00110

Checks: C-72579r1034585_chk

Verify the macOS system is configured to disable accounts after 35 days of inactivity with the following command: /usr/bin/pwpolicy -getaccountpolicies 2> /dev/null | /usr/bin/tail +2 | /usr/bin/xmllint --xpath '//dict/key[text()="policyAttributeInactiveDays"]/following-sibling::integer[1]/text()' - If the result is not "35", this is a finding.

Fix: F-72480r1131245_fix

Configure the macOS system to disable accounts after 35 days of inactivity with the following command: This setting may be enforced using local policy. To set local policy to disable an inactive user after 35 days, edit the current password policy to contain the following <dict> within the "policyCategoryAuthentication": [source,xml] ---- <dict> <key>policyContent</key> <string>policyAttributeLastAuthenticationTime > policyAttributeCurrentTime - (policyAttributeInactiveDays * 24 * 60 * 60)</string> <key>policyIdentifier</key> <string>Inactive Account</string> <key>policyParameters</key> <dict> <key>policyAttributeInactiveDays</key> <integer>35</integer> </dict> </dict> ---- After saving the file and exiting to the command prompt, run the following command to load the new policy file, substituting the path to the file in place of "$pwpolicy_file". [source,bash] ---- /usr/bin/pwpolicy setaccountpolicies $pwpolicy_file ----

b

The macOS system must configure Apple System Log (ASL) files owned by root and group to wheel.

SI-11 - Medium - CCI-001312 - V-268550 - SV-268550r1034590_rule

RMF Control

SI-11

Severity

M

CCI

Version

APPL-15-004001

Vuln IDs

V-268550

Rule IDs

SV-268550r1034590_rule

The Apple System Logs must be owned by root. ASLs contain sensitive data about the system and users. Setting ASL files to be readable and writable only by system administrators mitigates the risk. Satisfies: SRG-OS-000205-GPOS-00083, SRG-OS-000206-GPOS-00084

Checks: C-72580r1034588_chk

Verify the macOS system is configured with ASL files owned by root and group to wheel with the following command: /usr/bin/stat -f '%Su:%Sg:%N' $(/usr/bin/grep -e '^>' /etc/asl.conf /etc/asl/* | /usr/bin/awk '{ print $2 }') 2> /dev/null | /usr/bin/awk '!/^root:wheel:/{print $1}' | /usr/bin/wc -l | /usr/bin/tr -d ' ' If the result is not "0", this is a finding.

Fix: F-72481r1034589_fix

Configure the macOS system with ASL files owned by root and group to wheel with the following command: /usr/sbin/chown root:wheel $(/usr/bin/stat -f '%Su:%Sg:%N' $(/usr/bin/grep -e '^>' /etc/asl.conf /etc/asl/* | /usr/bin/awk '{ print $2 }') 2> /dev/null | /usr/bin/awk '!/^root:wheel:/{print $1}' | /usr/bin/awk -F":" '!/^root:wheel:/{print $3}')

b

The macOS system must configure Apple System Log (ASL) files to mode 640 or less permissive.

SI-11 - Medium - CCI-001312 - V-268551 - SV-268551r1034593_rule

RMF Control

SI-11

Severity

M

CCI

Version

APPL-15-004002

Vuln IDs

V-268551

Rule IDs

SV-268551r1034593_rule

The Apple System Logs must be configured to be writable by root and readable only by the root user and group wheel. To achieve this, ASL files must be configured to mode 640 permissive or less, thereby preventing normal users from reading, modifying, or deleting audit logs. System logs frequently contain sensitive information that could be used by an attacker. Setting the correct permissions mitigates this risk. Satisfies: SRG-OS-000205-GPOS-00083, SRG-OS-000206-GPOS-00084

Checks: C-72581r1034591_chk

Verify the macOS system is configured with ASL files to mode 640 or less permissive with the following command: /usr/bin/stat -f '%A:%N' $(/usr/bin/grep -e '^>' /etc/asl.conf /etc/asl/* | /usr/bin/awk '{ print $2 }') 2> /dev/null | /usr/bin/awk '!/640/{print $1}' | /usr/bin/wc -l | /usr/bin/tr -d ' ' If the result is not "0", this is a finding.

Fix: F-72482r1034592_fix

Configure the macOS system with ASL files to mode 640 with the following command: /bin/chmod 640 $(/usr/bin/stat -f '%A:%N' $(/usr/bin/grep -e '^>' /etc/asl.conf /etc/asl/* | /usr/bin/awk '{ print $2 }') 2> /dev/null | /usr/bin/awk -F":" '!/640/{print $2}')

b

The macOS system must configure system log files owned by root and group to wheel.

SI-11 - Medium - CCI-001312 - V-268552 - SV-268552r1034596_rule

RMF Control

SI-11

Severity

M

CCI

Version

APPL-15-004030

Vuln IDs

V-268552

Rule IDs

SV-268552r1034596_rule

The system log files must be owned by root. System logs contain sensitive data about the system and users. Setting log files to be readable and writable only by system administrators mitigates the risk. Satisfies: SRG-OS-000205-GPOS-00083, SRG-OS-000206-GPOS-00084

Checks: C-72582r1034594_chk

Verify the macOS system is configured with system log files owned by root and group to wheel with the following command: /usr/bin/stat -f '%Su:%Sg:%N' $(/usr/bin/grep -v '^#' /etc/newsyslog.conf | /usr/bin/awk '{ print $1 }') 2> /dev/null | /usr/bin/awk '!/^root:wheel:/{print $1}' | /usr/bin/wc -l | /usr/bin/tr -d ' ' If the result is not "0", this is a finding.

Fix: F-72483r1034595_fix

Configure the macOS system with system log files owned by root and group to wheel with the following command: /usr/sbin/chown root:wheel $(/usr/bin/stat -f '%Su:%Sg:%N' $(/usr/bin/grep -v '^#' /etc/newsyslog.conf | /usr/bin/awk '{ print $1 }') 2> /dev/null | /usr/bin/awk -F":" '!/^root:wheel:/{print $3}')

b

The macOS system must configure system log files to mode 640 or less permissive.

SI-11 - Medium - CCI-001312 - V-268553 - SV-268553r1034599_rule

RMF Control

SI-11

Severity

M

CCI

Version

APPL-15-004040

Vuln IDs

V-268553

Rule IDs

SV-268553r1034599_rule

The system logs must be configured to be writable by root and readable only by the root user and group wheel. To achieve this, system log files must be configured to mode 640 permissive or less, thereby preventing normal users from reading, modifying, or deleting audit logs. System logs frequently contain sensitive information that could be used by an attacker. Setting the correct permissions mitigates this risk. Satisfies: SRG-OS-000205-GPOS-00083, SRG-OS-000206-GPOS-00084

Checks: C-72583r1034597_chk

Verify the macOS system is configured with system log files set to mode 640 or less permissive with the following command: /usr/bin/stat -f '%A:%N' $(/usr/bin/grep -v '^#' /etc/newsyslog.conf | /usr/bin/awk '{ print $1 }') 2> /dev/null | /usr/bin/awk '!/640/{print $1}' | /usr/bin/wc -l | /usr/bin/tr -d ' ' If the result is not "0", this is a finding.

Fix: F-72484r1034598_fix

Configure the macOS system with system log files set to mode 640 or less permissive with the following command: /bin/chmod 640 $(/usr/bin/stat -f '%A:%N' $(/usr/bin/grep -v '^#' /etc/newsyslog.conf | /usr/bin/awk '{ print $1 }') 2> /dev/null | /usr/bin/awk '!/640/{print $1}' | awk -F":" '!/640/{print $2}')

a

The macOS system must configure install.log retention to 365.

AU-4 - Low - CCI-001849 - V-268554 - SV-268554r1034602_rule

RMF Control

AU-4

Severity

L

CCI

CCI-001849

Version

APPL-15-004050

Vuln IDs

V-268554

Rule IDs

SV-268554r1034602_rule

The install.log must be configured to require that records be kept for an organizational-defined value before deletion, unless the system uses a central audit record storage facility. Proper audit storage capacity is crucial to ensuring the ongoing logging of critical events.

Checks: C-72584r1034600_chk

Verify the macOS system is configured with install.log retention to 365 with the following command: /usr/sbin/aslmanager -dd 2>&1 | /usr/bin/awk '/\/var\/log\/install.log$/ {count++} /Processing module com.apple.install/,/Finished/ { for (i=1;i<=NR;i++) { if ($i == "TTL" && $(i+2) >= 365) { ttl="True" }; if ($i == "MAX") {max="True"}}} END{if (count > 1) { print "Multiple config files for /var/log/install, manually remove the extra files"} else if (max == "True") { print "all_max setting is configured, must be removed" } if (ttl != "True") { print "TTL not configured" } else { print "Yes" }}' If the result is not "yes", this is a finding.

Fix: F-72485r1034601_fix

Configure the macOS system with install.log retention to 365 with the following command: /usr/bin/sed -i '' "s/\* file \/var\/log\/install.log.*/\* file \/var\/log\/install.log format='\$$\(Time$$JZ$\) \$Host \$$Sender$\[\$$PID\$\]: \$Message' rotate=utc compress file_max=50M size_only ttl=365/g" /etc/asl/com.apple.install NOTE: If multiple configuration files in /etc/asl are set to process the file /var/log/install.log, these files must be manually removed.

c

The macOS system must ensure System Integrity Protection is enabled.

AU-6 - High - CCI-000154 - V-268555 - SV-268555r1034605_rule

RMF Control

AU-6

Severity

H

CCI

CCI-000154

Version

APPL-15-005001

Vuln IDs

V-268555

Rule IDs

SV-268555r1034605_rule

System Integrity Protection is vital to protecting the integrity of the system as it prevents malicious users and software from making unauthorized and/or unintended modifications to protected files and folders; ensures the presence of an audit record generation capability for defined auditable events for all operating system components; protects audit tools from unauthorized access, modification, and deletion; restricts the root user account and limits the actions that the root user can perform on protected parts of the macOS; and prevents nonprivileged users from granting other users direct access to the contents of their home directories and folders. NOTE: System Integrity Protection is enabled by default in macOS. Satisfies: SRG-OS-000051-GPOS-00024, SRG-OS-000054-GPOS-00025, SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000062-GPOS-00031, SRG-OS-000080-GPOS-00048, SRG-OS-000122-GPOS-00063, SRG-OS-000138-GPOS-00069, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099, SRG-OS-000259-GPOS-00100, SRG-OS-000278-GPOS-00108, SRG-OS-000350-GPOS-00138

Checks: C-72585r1034603_chk

Verify the macOS system is configured to enable System Integrity Protection with the following command: /usr/bin/csrutil status | /usr/bin/grep -c 'System Integrity Protection status: enabled.' If the result is not "1", this is a finding.

Fix: F-72486r1034604_fix

Configure the macOS system to enable System Integrity Protection by booting into "Recovery" mode, launching "Terminal" from the "Utilities" menu, and running the following command: /usr/bin/csrutil enable

c

The macOS system must enforce FileVault.

SC-28 - High - CCI-001199 - V-268556 - SV-268556r1131248_rule

RMF Control

SC-28

Severity

H

CCI

CCI-001199

Version

APPL-15-005020

Vuln IDs

V-268556

Rule IDs

SV-268556r1131248_rule

The information system implements cryptographic mechanisms to protect the confidentiality and integrity of information stored on digital media during transport outside of controlled areas. Satisfies: SRG-OS-000185-GPOS-00079, SRG-OS-000404-GPOS-00183, SRG-OS-000405-GPOS-00184

Checks: C-72586r1034606_chk

Verify the macOS system is configured to enforce FileVault with the following command: dontAllowDisable=$(/usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.MCX')\ .objectForKey('dontAllowFDEDisable').js EOS ) fileVault=$(/usr/bin/fdesetup status | /usr/bin/grep -c "FileVault is On.") if [[ "$dontAllowDisable" == "true" ]] && [[ "$fileVault" == 1 ]]; then echo "1" else echo "0" fi If the result is not "1", this is a finding.

Fix: F-72487r1131247_fix

Refer to the FileVault supplemental to implement this rule. Configure the macOS system to enforce FileVault by installing the "com.apple.MCX" configuration profile.

b

The macOS system must enable macOS Application Firewall.

CM-6 - Medium - CCI-000366 - V-268557 - SV-268557r1034611_rule

RMF Control

CM-6

Severity

M

CCI

Version

APPL-15-005050

Vuln IDs

V-268557

Rule IDs

SV-268557r1034611_rule

The macOS Application Firewall is the built-in firewall that comes with macOS, and it must be enabled. When the macOS Application Firewall is enabled, the flow of information within the information system and between interconnected systems will be controlled by approved authorizations.

Checks: C-72587r1034609_chk

Verify the macOS system is configured to enable the Application Firewall with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.security.firewall')\ .objectForKey('EnableFirewall').js EOS If the result is not "true", this is a finding.

Fix: F-72488r1034610_fix

Configure the macOS system to enable the Application Firewall by installing the "com.apple.security.firewall" configuration profile.

b

The macOS system must configure the login window to prompt for username and password.

IA-2 - Medium - CCI-000764 - V-268558 - SV-268558r1034614_rule

RMF Control

IA-2

Severity

M

CCI

Version

APPL-15-005052

Vuln IDs

V-268558

Rule IDs

SV-268558r1034614_rule

The login window must be configured to prompt all users for both a username and a password. By default, the system displays a list of known users on the login window, which can make it easier for a malicious user to gain access to someone else's account. Requiring users to type in both their username and password mitigates the risk of unauthorized users gaining access to the information system.

Checks: C-72588r1034612_chk

Verify the macOS system is configured to prompt for username and password at the login window with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.loginwindow')\ .objectForKey('SHOWFULLNAME').js EOS If the result is not "true", this is a finding.

Fix: F-72489r1034613_fix

Configure the macOS system to prompt for username and password at the login window by installing the "com.apple.loginwindow" configuration profile.

b

The macOS system must disable the TouchID prompt during Setup Assistant.

CM-7 - Medium - CCI-000381 - V-268559 - SV-268559r1034617_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-005054

Vuln IDs

V-268559

Rule IDs

SV-268559r1034617_rule

The prompt for TouchID during Setup Assistant must be disabled. macOS prompts new users through enabling TouchID during Setup Assistant; this is not essential and, therefore, must be disabled to prevent the risk of individuals electing to enable TouchID to override organizationwide settings.

Checks: C-72589r1034615_chk

Verify the macOS system is configured to disable the TouchID prompt during Setup Assistant with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.SetupAssistant.managed')\ .objectForKey('SkipTouchIDSetup').js EOS If the result is not "true", this is a finding.

Fix: F-72490r1034616_fix

Configure the macOS system to disable the TouchID prompt during Setup Assistant by installing the "com.apple.SetupAssistant.managed" configuration profile.

b

The macOS system must disable the Screen Time prompt during Setup Assistant.

CM-7 - Medium - CCI-000381 - V-268560 - SV-268560r1034620_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-005055

Vuln IDs

V-268560

Rule IDs

SV-268560r1034620_rule

The prompt for Screen Time setup during Setup Assistant must be disabled. Enabling any service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.

Checks: C-72590r1034618_chk

Verify the macOS system is configured to disable the Screen Time prompt during Setup Assistant with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.SetupAssistant.managed')\ .objectForKey('SkipScreenTime').js EOS If the result is not "true", this is a finding.

Fix: F-72491r1034619_fix

Configure the macOS system to disable the Screen Time prompt during Setup Assistant by installing the "com.apple.SetupAssistant.managed" configuration profile.

b

The macOS system must disable Unlock with Apple Watch during Setup Assistant.

CM-7 - Medium - CCI-000381 - V-268561 - SV-268561r1034623_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-005056

Vuln IDs

V-268561

Rule IDs

SV-268561r1034623_rule

The prompt for Apple Watch unlock setup during Setup Assistant must be disabled. Disabling Apple watches is a necessary step to ensuring the information system retains a session lock until the user reestablishes access using authorized identification and authentication procedures.

Checks: C-72591r1034621_chk

Verify the macOS system is configured to disable Unlock with Apple Watch during Setup Assistant with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.SetupAssistant.managed')\ .objectForKey('SkipUnlockWithWatch').js EOS If the result is not "true", this is a finding.

Fix: F-72492r1034622_fix

Configure the macOS system to disable Unlock with Apple Watch during Setup Assistant by installing the "com.apple.SetupAssistant.managed" configuration profile.

b

The macOS system must disable Handoff.

AC-3 - Medium - CCI-000213 - V-268562 - SV-268562r1117265_rule

RMF Control

AC-3

Severity

M

CCI

Version

APPL-15-005058

Vuln IDs

V-268562

Rule IDs

SV-268562r1117265_rule

Handoff must be disabled. Handoff allows users to continue working on a document or project when the user switches from one Apple device to another. Disabling Handoff prevents data transfers to unauthorized devices. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000095-GPOS-00049, SRG-OS-000300-GPOS-00118

Checks: C-72592r1034624_chk

Verify the macOS system is configured to disable Handoff with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowActivityContinuation').js EOS If the result is not "false", this is a finding.

Fix: F-72493r1034625_fix

Configure the macOS system to disable Handoff by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable proximity-based password sharing requests.

CM-7 - Medium - CCI-000381 - V-268563 - SV-268563r1034629_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-005060

Vuln IDs

V-268563

Rule IDs

SV-268563r1034629_rule

Proximity-based password sharing requests must be disabled. The default behavior of macOS is to allow users to request passwords from other known devices (macOS and iOS). This feature must be disabled to prevent passwords from being shared.

Checks: C-72593r1034627_chk

Verify the macOS system is configured to disable proximity-based password sharing requests with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowPasswordProximityRequests').js EOS If the result is not "false", this is a finding.

Fix: F-72494r1034628_fix

Configure the macOS system to disable proximity-based password sharing requests by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable Erase Content and Settings.

CM-7 - Medium - CCI-000381 - V-268564 - SV-268564r1034632_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-005061

Vuln IDs

V-268564

Rule IDs

SV-268564r1034632_rule

Erase Content and Settings must be disabled. Without disabling the Erase Content and Settings configuration, forensics data could be lost if this feature is activated on a compromised system.

Checks: C-72594r1034630_chk

Verify the macOS system is configured to disable Erase Content and Settings with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowEraseContentAndSettings').js EOS If the result is not "false", this is a finding.

Fix: F-72495r1034631_fix

Configure the macOS system to disable Erase Content and Settings by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must enable Authenticated Root.

AC-3 - Medium - CCI-000213 - V-268565 - SV-268565r1117265_rule

RMF Control

AC-3

Severity

M

CCI

Version

APPL-15-005070

Vuln IDs

V-268565

Rule IDs

SV-268565r1117265_rule

Authenticated Root must be enabled. When Authenticated Root is enabled, the macOS is booted from a signed volume that is cryptographically protected to prevent tampering with the system volume. NOTE: Authenticated Root is enabled by default on macOS systems. WARNING: If more than one partition with macOS is detected, the csrutil command will hang awaiting input.

Checks: C-72595r1034633_chk

Verify the macOS system is configured to enable authenticated root with the following command: /usr/libexec/mdmclient QuerySecurityInfo | /usr/bin/grep -c "AuthenticatedRootVolumeEnabled = 1;" If the result is not "1", this is a finding.

Fix: F-72496r1034634_fix

Configure the macOS system to enable authenticated root with the following command: /usr/bin/csrutil authenticated-root enable NOTE: To reenable "Authenticated Root", boot the affected system into "Recovery" mode, launch "Terminal" from the "Utilities" menu, and run the command.

b

The macOS system must prohibit user installation of software into /users/.

Medium - CCI-003980 - V-268566 - SV-268566r1131250_rule

RMF Control

Severity

M

CCI

CCI-003980

Version

APPL-15-005080

Vuln IDs

V-268566

Rule IDs

SV-268566r1131250_rule

Users must not be allowed to install software into /users/. Allowing regular users without explicit privileges to install software presents the risk of untested and potentially malicious software being installed on the system. Explicit privileges (escalated or administrative privileges) provide the regular user with explicit capabilities and control that exceeds the rights of a regular user. [IMPORTANT] ==== Apple has deprecated the use of application restriction controls (https://github.com/apple/device-management/blob/eb51fb0cb9626cac4717858556912c257a734ce0/mdm/profiles/com.apple.applicationaccess.new.yaml#L67-L70). Using these controls may not work as expected. Third party software may be required to fulfill the compliance requirements. ====

Checks: C-72596r1131249_chk

Verify the macOS system is configured to prohibit user installation of software into /users/ with the following command: /usr/bin/osascript -l JavaScript << EOS function run() { let pref1 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess.new')\ .objectForKey('familyControlsEnabled')) let pathlist = $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess.new')\ .objectForKey('pathBlackList').js for ( let app in pathlist ) { if ( ObjC.unwrap(pathlist[app]) == "/Users/" && pref1 == true ){ return("true") } } return("false") } EOS If the result is not "true", this is a finding.

Fix: F-72497r1034637_fix

Configure the macOS system to prohibit user installation of software into /users/ by installing the "com.apple.applicationaccess.new" configuration profile.

b

The macOS system must authorize USB devices before allowing connection.

IA-3 - Medium - CCI-001958 - V-268567 - SV-268567r1131252_rule

RMF Control

IA-3

Severity

M

CCI

CCI-001958

Version

APPL-15-005090

Vuln IDs

V-268567

Rule IDs

SV-268567r1131252_rule

USB devices connected to a Mac must be authorized. [IMPORTANT] ==== This feature is removed if a smart card is paired or smart card attribute mapping is configured. ==== Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Satisfies: SRG-OS-000378-GPOS-00163, SRG-OS-000690-GPOS-00140

Checks: C-72597r1131251_chk

Verify the macOS system is configured to authorize USB devices before allowing connection with the following command: /usr/bin/osascript -l JavaScript << EOS function run() { let pref1 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowUSBRestrictedMode')) if ( pref1 == false ) { return("false") } else { return("true") } } EOS If the result is not "true", this is a finding.

Fix: F-72498r1034640_fix

Configure the macOS system to authorize USB devices before allowing connection by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must ensure Secure Boot level is set to "full".

SI-6 - Medium - CCI-002696 - V-268568 - SV-268568r1034644_rule

RMF Control

SI-6

Severity

M

CCI

CCI-002696

Version

APPL-15-005100

Vuln IDs

V-268568

Rule IDs

SV-268568r1034644_rule

The Secure Boot security setting must be set to "full". Full security is the default Secure Boot setting in macOS. During startup, when Secure Boot is set to full security, the Mac will verify the integrity of the operating system before allowing the operating system to boot. NOTE: This will only return a proper result on a T2 or Apple Silicon Macs. Satisfies: SRG-OS-000445-GPOS-00199, SRG-OS-000446-GPOS-00200, SRG-OS-000447-GPOS-00201

Checks: C-72598r1034642_chk

Verify the macOS system is configured to ensure Secure Boot level is set to "full" using the following command: /usr/libexec/mdmclient QuerySecurityInfo | /usr/bin/grep -c "SecureBootLevel = full" If the result is not "1", this is a finding.

Fix: F-72499r1034643_fix

Configure the macOS system to ensure Secure Boot level is set to "full" by booting into Recovery Mode and enabling Full Secure Boot.

b

The macOS system must enforce enrollment in Mobile Device Management (MDM).

CM-6 - Medium - CCI-000366 - V-268569 - SV-268569r1034647_rule

RMF Control

CM-6

Severity

M

CCI

Version

APPL-15-005110

Vuln IDs

V-268569

Rule IDs

SV-268569r1034647_rule

Users must enroll their Mac in MDM software. User Approved MDM (UAMDM) enrollment or enrollment via Apple Business Manager (ABM)/Apple School Manager (ASM) is required to manage certain security settings. Currently, these include: * Allowed Kernel Extensions. * Allowed Approved System Extensions. * Privacy Preferences Policy Control Payload. * ExtensibleSingleSignOn. * FDEFileVault. * Activation Lock Bypass. * Access to Bootstrap Tokens. * Scheduling Software Updates. * Query list and delete local users.

Checks: C-72599r1034645_chk

Verify the macOS system is configured to enforce enrollment in mobile device management with the following command: /usr/bin/profiles status -type enrollment | /usr/bin/awk -F: '/MDM enrollment/ {print $2}' | /usr/bin/grep -c "Yes (User Approved)" If the result is not "1", this is a finding.

Fix: F-72500r1034646_fix

Configure the macOS system by ensuring that the system is enrolled via UAMDM.

b

The macOS system must enable Recovery Lock.

CM-6 - Medium - CCI-000366 - V-268570 - SV-268570r1034650_rule

RMF Control

CM-6

Severity

M

CCI

Version

APPL-15-005120

Vuln IDs

V-268570

Rule IDs

SV-268570r1034650_rule

A Recovery Lock password must be enabled and set. Single user mode, recovery mode, the Startup Manager, and several other tools are available on macOS by holding down specific key combinations during startup. Setting a recovery lock restricts access to these tools. IMPORTANT: Recovery lock passwords are not supported on Intel devices. This rule is only applicable to Apple Silicon devices.

Checks: C-72600r1034648_chk

For non-Apple Silicon systems, this is not applicable. Verify the macOS system is configured with Recovery Lock with the following command: /usr/libexec/mdmclient QuerySecurityInfo | /usr/bin/grep -c "IsRecoveryLockEnabled = 1" If the result is not "1", this is a finding.

Fix: F-72501r1034649_fix

Configure the macOS system with Recovery Lock with the SetRecoveryLock command. This can be used to set a Recovery Lock password and must be from the MDM.

b

The macOS system must enforce installation of XProtect Remediator and Gatekeeper updates automatically.

CM-6 - Medium - CCI-000366 - V-268571 - SV-268571r1034653_rule

RMF Control

CM-6

Severity

M

CCI

Version

APPL-15-005130

Vuln IDs

V-268571

Rule IDs

SV-268571r1034653_rule

Software Update must be configured to update XProtect Remediator and Gatekeeper automatically. This setting enforces definition updates for XProtect Remediator and Gatekeeper. With this setting in place, new malware and adware that Apple has added to the list of malware or untrusted software will not execute. These updates do not require the computer to be restarted. https://support.apple.com/en-us/HT207005 NOTE: Software update will automatically update XProtect Remediator and Gatekeeper by default in the macOS.

Checks: C-72601r1034651_chk

Verify the macOS system is configured to enforce installation of XProtect Remediator and Gatekeeper updates automatically with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.SoftwareUpdate')\ .objectForKey('ConfigDataInstall').js EOS If the result is not "true", this is a finding.

Fix: F-72502r1034652_fix

Configure the macOS system to enforce installation of XProtect Remediator and Gatekeeper updates automatically by installing the "com.apple.SoftwareUpdate" configuration profile.

b

The macOS system must disable Genmoji.

CM-7 - Medium - CCI-000381 - V-268572 - SV-268572r1034656_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-005140

Vuln IDs

V-268572

Rule IDs

SV-268572r1034656_rule

Apple Intelligence features that use off-device Artificial Intelligence (AI) must be disabled. Use of off-device AI poses a data loss risk.

Checks: C-72602r1034654_chk

Verify the macOS system is configured to disable Genmoji with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowGenmoji').js EOS If the result is not "false", this is a finding.

Fix: F-72503r1034655_fix

Configure the macOS system to disable Genmoji by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable Apple Intelligence Image Generation.

CM-7 - Medium - CCI-000381 - V-268573 - SV-268573r1034659_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-005150

Vuln IDs

V-268573

Rule IDs

SV-268573r1034659_rule

Apple Intelligence features that use off-device artificial intelligence must be disabled. Use of off-device AI poses a data loss risk.

Checks: C-72603r1034657_chk

Verify the macOS system is configured to disable Apple Intelligence Image Generation with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowImagePlayground').js EOS If the result is not "false", this is a finding.

Fix: F-72504r1034658_fix

Configure the macOS system to disable Apple Intelligence Image Generation by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must disable Apple Intelligence Writing Tools.

CM-7 - Medium - CCI-000381 - V-268574 - SV-268574r1034662_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-005160

Vuln IDs

V-268574

Rule IDs

SV-268574r1034662_rule

Apple Intelligence features that use off device Artificial Intelligence must be disabled. Use of off-device AI poses a data loss risk.

Checks: C-72604r1034660_chk

Verify the macOS system is configured to disable Apple Intelligence Writing Tools with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowWritingTools').js EOS If the result is not "false", this is a finding.

Fix: F-72505r1034661_fix

Configure the macOS system to disable Apple Intelligence Writing Tools by installing the "com.apple.applicationaccess" configuration profile.

b

The macOS system must install security-relevant software updates within 30 days unless the time period is directed by an authoritative source (e.g., IAVM, CTOs, DTMs, STIGs).

SI-2 - Medium - CCI-002605 - V-268575 - SV-268575r1131255_rule

RMF Control

SI-2

Severity

M

CCI

CCI-002605

Version

APPL-15-999999

Vuln IDs

V-268575

Rule IDs

SV-268575r1131255_rule

Security flaws with operating systems are discovered daily. Vendors are constantly updating and patching their products to address newly discovered security vulnerabilities. Organizations (including any contractor to the organization) are required to promptly install security-relevant software updates (e.g., patches, service packs, and hot fixes). Flaws discovered during security assessments, continuous monitoring, incident response activities, or information system error handling must also be addressed expeditiously.

Checks: C-72605r1131253_chk

Verify security-relevant software updates are installed on the operating system within 30 days unless the time period is directed by an authoritative source (e.g., IAVM, CTOs, DTMs, STIGs). Click the Apple icon on the menu at the top left corner of the screen. Select the "About This Mac" option. Select the "More Info..." button. Under the macOS section, there are details about the update version. Compare this to the latest available macOS update version. If the installed updates are not the latest and the latest updates have been available for 30 days or more, this is a finding.

Fix: F-72506r1131254_fix

Install the latest updates within 30 days unless the time period is directed by an authoritative source (e.g., IAVM, CTOs, DTMs, STIGs).

b

The macOS system must enforce SSH to display a policy banner.

AC-8 - Medium - CCI-000048 - V-269093 - SV-269093r1131184_rule

RMF Control

AC-8

Severity

M

CCI

CCI-000048

Version

APPL-15-000024

Vuln IDs

V-269093

Rule IDs

SV-269093r1131184_rule

SSH must be configured to display a policy banner. Displaying a standardized and approved use notification before granting access to the operating system ensures that users are provided with privacy and security notification verbiage that is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. System use notifications are required only for access via login interfaces with human users and are not required when such human interfaces do not exist. Note: /etc/ssh/sshd_config will be automatically modified to its original state following any update or major upgrade to the operating system. Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000024-GPOS-00007

Checks: C-73123r1034752_chk

Verify the macOS system is configured to display the contents of "/etc/banner" before granting access to the system with the following command: /usr/sbin/sshd -G | /usr/bin/grep -c "^banner /etc/banner" If the command does not return "1", this is a finding.

Fix: F-73024r1131183_fix

Configure the macOS system to display the contents of "/etc/banner" before granting access to the system with the following command: include_dir=$(/usr/bin/awk '/^Include/ {print $2}' /etc/ssh/sshd_config | /usr/bin/tr -d '*') if [[ -z $include_dir ]]; then /usr/bin/sed -i.bk "1s/.*/Include \/etc\/ssh\/sshd_config.d\/\*/" /etc/ssh/sshd_config fi /usr/bin/grep -qxF 'banner /etc/banner' "${include_dir}01-mscp-sshd.conf" 2>/dev/null || echo "banner /etc/banner" >> "${include_dir}01-mscp-sshd.conf" for file in $(ls ${include_dir}); do if [[ "$file" == "100-macos.conf" ]]; then continue fi if [[ "$file" == "01-mscp-sshd.conf" ]]; then break fi /bin/mv ${include_dir}${file} ${include_dir}20-${file} done

b

The macOS system must be configured to audit all failed program execution on the system.

Medium - CCI-003938 - V-269094 - SV-269094r1034757_rule

RMF Control

Severity

M

CCI

CCI-003938

Version

APPL-15-001024

Vuln IDs

V-269094

Rule IDs

SV-269094r1034757_rule

The audit system must be configured to record enforcement actions of access restrictions, including failed program execute (-ex) 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 program execution restrictions (e.g., denying users access to execute certain processes). This configuration ensures that audit lists include events in which program execution has failed. Without auditing the enforcement of program execution, it is difficult to identify attempted attacks because no audit trail is available for forensic investigation. Satisfies: SRG-OS-000365-GPOS-00152, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209

Checks: C-73124r1034755_chk

Verify the macOS system is configured to audit all failed program execution 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 '\-ex' If the result is not "1", this is a finding.

Fix: F-73025r1034756_fix

Configure the macOS system to audit all failed program execution on the system with the following command: /usr/bin/grep -qE "^flags.*-ex" /etc/security/audit_control || /usr/bin/sed -i.bak '/^flags/ s/$/,-ex/' /etc/security/audit_control; /usr/sbin/audit -s

b

The macOS system must configure audit_control to not contain access control lists (ACLs).

AU-9 - Medium - CCI-000162 - V-269095 - SV-269095r1034760_rule

RMF Control

AU-9

Severity

M

CCI

Version

APPL-15-001140

Vuln IDs

V-269095

Rule IDs

SV-269095r1034760_rule

/etc/security/audit_control must not contain ACLs. /etc/security/audit_control contains sensitive configuration data about the audit service. This rule ensures that the audit service is configured to be readable and writable only by system administrators to prevent normal users from manipulating audit logs. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000063-GPOS-00032, SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099

Checks: C-73125r1034758_chk

Verify the macOS system is configured without ACLs applied to audit_control with the following command: /bin/ls -le /etc/security/audit_control | /usr/bin/awk '{print $1}' | /usr/bin/grep -c ":" If the result is not "0", this is a finding.

Fix: F-73026r1034759_fix

Configure the macOS system without ACLs applied to audit_control with the following command: /bin/chmod -N /etc/security/audit_control

b

The macOS system must disable sending audio recordings and transcripts to Apple.

CM-7 - Medium - CCI-000381 - V-269096 - SV-269096r1131214_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002023

Vuln IDs

V-269096

Rule IDs

SV-269096r1131214_rule

The ability for Apple to store and review audio recordings and transcripts of vocal shortcuts and voice control interactions must be disabled. The information system must be configured to provide only essential capabilities. Disabling the submission of this information will mitigate the risk of unwanted data being sent to Apple.

Checks: C-73126r1131213_chk

Verify the macOS system is configured to disable sending audio recordings and transcripts with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.Accessibility')\ .objectForKey('AXSAudioDonationSiriImprovementEnabled').js EOS If the result is not "false", this is a finding.

Fix: F-73027r1034783_fix

Configure the macOS system to disable sending audio recordings and transcripts by installing the "com.apple.accessibility" configuration profile.

b

The macOS system must disable sending search data from Spotlight to Apple.

CM-7 - Medium - CCI-000381 - V-269566 - SV-269566r1131216_rule

RMF Control

CM-7

Severity

M

CCI

Version

APPL-15-002024

Vuln IDs

V-269566

Rule IDs

SV-269566r1131216_rule

Sending data to Apple to help improve search must be disabled. The information system must be configured to provide only essential capabilities. Disabling the submission of search data will mitigate the risk of unwanted data being sent to Apple.

Checks: C-73599r1131215_chk

Verify the macOS system is configured to disable sending search data from Spotlight with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.assistant.support')\ .objectForKey('Search Queries Data Sharing Status').js EOS If the result is not "2", this is a finding.

Fix: F-73500r1034792_fix

Configure the macOS system to disable sending search data from Spotlight by installing the "com.apple.assistant.support" configuration profile.

b

The macOS system must disable iPhone Mirroring.

AC-3 - Medium - CCI-000213 - V-272477 - SV-272477r1117265_rule

RMF Control

AC-3

Severity

M

CCI