Apple OS X 10.12 Security Technical Implementation Guide

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

Details

Version / Release: V1R4

Published: 2018-12-24

Updated At: 2019-01-27 11:43:16

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Findings
Severity Open Not Reviewed Not Applicable Not a Finding
Overall 0 0 0 0
Low 0 0 0 0
Medium 0 0 0 0
High 0 0 0 0
Drop CKL or SCAP (XCCDF) results here.

    Vuln Rule Version CCI Severity Title Description Status Finding Details Comments
    SV-90633r1_rule AOSX-12-000005 CCI-000060 LOW The OS X system must conceal, via the session lock, information previously visible on the display with a publicly viewable image. A default screen saver must be configured for all users, as the screen saver will act as a session time-out lock for the system and must conceal the contents of the screen from unauthorized users. The screen saver must not display any sensitive informatio
    SV-90635r2_rule AOSX-12-000006 CCI-000060 MEDIUM The OS X system must be configured to disable hot corners. Although hot comers can be used to initiate a session lock or launch useful applications, they can also be configured to disable an automatic session lock from initiating. Such a configuration introduces the risk that a user might forget to manually lock
    SV-90637r1_rule AOSX-12-000007 CCI-000056 MEDIUM The OS X system must be configured to prevent Apple Watch from terminating a session lock. Users must be prompted to enter their passwords when unlocking the screen saver. The screen saver acts as a session lock and prevents unauthorized users from accessing the current user's account.
    SV-90639r1_rule AOSX-12-000010 CCI-000057 MEDIUM The OS X system must initiate a session lock after a 15-minute period of inactivity. A screen saver must be enabled and set to require a password to unlock. The timeout should be set to 15 minutes of inactivity. This mitigates the risk that a user might forget to manually lock the screen before stepping away from the computer. A session
    SV-90641r1_rule AOSX-12-000020 CCI-000056 MEDIUM The OS X system must retain the session lock until the user reestablishes access using established identification and authentication procedures. Users must be prompted to enter their passwords when unlocking the screen saver. The screen saver acts as a session lock and prevents unauthorized users from accessing the current user's account.
    SV-90643r1_rule AOSX-12-000025 CCI-000056 MEDIUM The OS X system must initiate the session lock no more than five seconds after a screen saver is started. A screen saver must be enabled and set to require a password to unlock. An excessive grace period impacts the ability for a session to be truly locked, requiring authentication to unlock.
    SV-90645r1_rule AOSX-12-000030 CCI-000067 MEDIUM The OS X system must monitor remote access methods and generate audit records when successful/unsuccessful attempts to access/modify privileges occur. Frequently, an attacker that successfully gains access to a system has only gained access to an account with limited privileges, such as a guest account or a service account. The attacker must attempt to change to another user account with normal or eleva
    SV-90647r1_rule AOSX-12-000035 CCI-000068 HIGH The OS X system must implement DoD-approved encryption to protect the confidentiality and integrity of remote access sessions including transmitted data and data during preparation for transmission. Without confidentiality and integrity protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote access session. Remote access is access to DoD non-public information systems by an authorized user (or an informa
    SV-90649r1_rule AOSX-12-000050 CCI-000381 HIGH The OS X system must be configured to disable rshd service. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90651r1_rule AOSX-12-000055 CCI-000366 MEDIUM The OS X system must enforce requirements for remote connections to the information system. The Screen Sharing feature allows remote users to view or control the desktop of the current user. A malicious user can take advantage of screen sharing to gain full access to the system remotely, either with stolen credentials or by guessing the username
    SV-90653r1_rule AOSX-12-000065 CCI-000366 LOW The OS X system must be configured with Bluetooth turned off unless approved by the organization. The Bluetooth kernel extension must be disabled, as wireless access introduces unnecessary security risks. Disabling Bluetooth support with a configuration profile mitigates this risk.
    SV-90655r1_rule AOSX-12-000070 CCI-001443 MEDIUM The OS X system must be configured with Wi-Fi support software disabled. Use of Wi-Fi to connect to unauthorized networks may facilitate the exfiltration of mission data. Satisfies: SRG-OS-000300-GPOS-00118, SRG-OS-000480-GPOS-00227
    SV-90657r1_rule AOSX-12-000075 CCI-000366 MEDIUM The OS X system must be configured with Infrared [IR] support disabled. IR kernel support must be disabled to prevent users from controlling the system with IR devices. By default, if IR is enabled, the system will accept IR control from any remote device.
    SV-90659r1_rule AOSX-12-000085 CCI-000366 MEDIUM The OS X system must be configured with automatic actions disabled for blank CDs. Applications should not be configured to launch automatically when a disk is inserted. This potentially circumvents anti-virus software and allows malicious users to craft disks that can exploit user applications. Disabling Automatic Actions for blank CDs
    SV-90661r1_rule AOSX-12-000090 CCI-000366 MEDIUM The OS X system must be configured with automatic actions disabled for blank DVDs. Applications should not be configured to launch automatically when a disk is inserted. This potentially circumvents anti-virus software and allows malicious users to craft disks that can exploit user applications. Disabling Automatic Actions for blank DVD
    SV-90663r1_rule AOSX-12-000095 CCI-000366 MEDIUM The OS X system must be configured with automatic actions disabled for music CDs. Applications should not be configured to launch automatically when a disk is inserted. This potentially circumvents anti-virus software and allows malicious users to craft disks that can exploit user applications. Disabling Automatic Actions for music CDs
    SV-90665r1_rule AOSX-12-000100 CCI-000366 MEDIUM The OS X system must be configured with automatic actions disabled for picture CDs. Applications should not be configured to launch automatically when a disk is inserted. This potentially circumvents anti-virus software and allows malicious users to craft disks that can exploit user applications. Disabling Automatic Actions for picture C
    SV-90667r1_rule AOSX-12-000105 CCI-000366 MEDIUM The OS X system must be configured with automatic actions disabled for video DVDs. Applications should not be configured to launch automatically when a disk is inserted. This potentially circumvents anti-virus software and allows malicious users to craft disks that can exploit user applications. Disabling Automatic Actions for video DVD
    SV-90669r1_rule AOSX-12-000110 CCI-000016 MEDIUM The OS X system must automatically remove or disable temporary user accounts after 72 hours. If temporary user accounts remain active when no longer needed or for an excessive period, these accounts may be targeted by attackers to gain unauthorized access. To mitigate this risk, automated termination of all temporary accounts must be set upon acc
    SV-90671r1_rule AOSX-12-000115 CCI-001682 MEDIUM The OS X system must automatically remove or disable emergency accounts after the crisis is resolved or within 72 hours. 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 th
    SV-90673r1_rule AOSX-12-000120 CCI-000018 MEDIUM The OS X system must generate audit records for all account creations, modifications, disabling, and termination events; privileged activities or other system-level access; all kernel module load, unload, and restart actions; all program initiations; and organizationally defined events for all non-local maintenance and diagnostic sessions. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit record
    SV-90675r1_rule AOSX-12-000139 CCI-000381 MEDIUM The OS X system must be configured to disable SMB File Sharing unless it is required. File Sharing is usually non-essential and must be disabled if not required. Enabling any service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.
    SV-90677r1_rule AOSX-12-000140 CCI-000381 MEDIUM The OS X system must be configured to disable Apple File (AFP) Sharing. File Sharing is non-essential and must be disabled. Enabling any service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.
    SV-90679r1_rule AOSX-12-000141 CCI-000381 MEDIUM The OS X system must be configured to disable the Network File System (NFS) daemon unless it is required. If the system does not require access to NFS file shares or is not acting as an NFS server, support for NFS is non-essential and NFS services must be disabled. NFS is a network file system protocol supported by UNIX-like operating systems. Enabling any se
    SV-90681r1_rule AOSX-12-000142 CCI-000381 MEDIUM The OS X system must be configured to disable the Network File System (NFS) lock daemon unless it is required. If the system does not require access to NFS file shares or is not acting as an NFS server, support for NFS is non-essential and NFS services must be disabled. NFS is a network file system protocol supported by UNIX-like operating systems. Enabling any se
    SV-90683r1_rule AOSX-12-000143 CCI-000381 MEDIUM The OS X system must be configured to disable the Network File System (NFS) stat daemon unless it is required. If the system does not require access to NFS file shares or is not acting as an NFS server, support for NFS is non-essential and NFS services must be disabled. NFS is a network file system protocol supported by UNIX-like operating systems. Enabling any se
    SV-90685r1_rule AOSX-12-000155 CCI-000366 MEDIUM The OS X system firewall must be configured with a default-deny policy. An approved firewall must be installed and enabled to work in concert with the OS X Application Firewall. When configured correctly, firewalls protect computers from network attacks by blocking or limiting access to open network ports.
    SV-90687r1_rule AOSX-12-000186 CCI-000048 MEDIUM The OS X system must display the Standard Mandatory DoD Notice and Consent Banner before granting access to the operating system. Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations,
    SV-90689r1_rule AOSX-12-000187 CCI-000048 MEDIUM The OS X system must display the Standard Mandatory DoD Notice and Consent Banner before granting access to the system via SSH. Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations,
    SV-90691r1_rule AOSX-12-000195 CCI-000048 MEDIUM The OS X system must be configured so that any connection to the system must display the Standard Mandatory DoD Notice and Consent Banner before granting access to the system. Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations,
    SV-90693r1_rule AOSX-12-000200 CCI-000172 MEDIUM The OS X system must generate audit records for DoD-defined events such as successful/unsuccessful logon attempts, successful/unsuccessful direct access attempts, starting and ending time for user access, and concurrent logons to the same account from different sources. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit recor
    SV-90695r1_rule AOSX-12-000230 CCI-000130 MEDIUM The OS X system must initiate session audits at system startup, using internal clocks with time stamps for audit records that meet a minimum granularity of one second and can be mapped to Coordinated Universal Time (UTC) or Greenwich Mean Time (GMT), in order to generate audit records containing information to establish what type of events occurred, the identity of any individual or process associated with the event, including individual identities of group account users, establish where the events occurre Without establishing what type of events occurred, when they occurred, and by whom it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. Audit record content that may be necessary to satisfy this req
    SV-90697r1_rule AOSX-12-000240 CCI-000154 MEDIUM The OS X system must enable System Integrity Protection. The System Integrity Protection is vital to prevent unauthorized and unintended information transfer via shared system resources, protect audit tools from unauthorized access, modification, and deletion, limit privileges to change software resident within
    SV-90699r1_rule AOSX-12-000295 CCI-001849 MEDIUM The OS X system must allocate audit record storage capacity to store at least one weeks worth of audit records when audit records are not immediately sent to a central audit record storage facility. The audit service must be configured to require that records are kept for seven days or longer before deletion when there is no central audit record storage facility. When "expire-after" is set to "7d", the audit service will not delete audit logs until t
    SV-90701r1_rule AOSX-12-000305 CCI-001855 MEDIUM The OS X system must provide an immediate warning to the System Administrator (SA) and Information System Security Officer (ISSO) (at a minimum) when allocated audit record storage volume reaches 75 percent of repository maximum audit record storage capacity. The audit service must be configured to require a minimum percentage of free disk space in order to run. This ensures that audit will notify the administrator that action is required to free up more disk space for audit logs. When "minfree" is set to 25
    SV-90703r1_rule AOSX-12-000310 CCI-001858 MEDIUM The OS X system must provide an immediate real-time alert to the System Administrator (SA) and Information System Security Officer (ISSO), at a minimum, of all audit failure events requiring real-time alerts. The audit service should be configured to immediately print messages to the console or email administrator users when an auditing failure occurs. It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit l
    SV-90705r1_rule AOSX-12-000330 CCI-001891 MEDIUM The OS X system must, for networked systems, compare internal information system clocks at least every 24 hours with a server that is synchronized to one of the redundant United States Naval Observatory (USNO) time servers or a time server designated for the appropriate DoD network (NIPRNet/SIPRNet) and/or the Global Positioning System (GPS). Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. S
    SV-90707r1_rule AOSX-12-000331 CCI-000162 MEDIUM The OS X system must be configured with audit log files owned by root. The audit service must be configured to create log files with the correct ownership to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and users. If log files are set to only be readable and writable by roo
    SV-90709r1_rule AOSX-12-000332 CCI-000162 MEDIUM The OS X system must be configured with audit log folders owned by root. The audit service must be configured to create log files with the correct ownership to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and about users. If log files are set to be readable and writable only
    SV-90711r1_rule AOSX-12-000333 CCI-000162 MEDIUM The OS X system must be configured with audit log files group-owned by wheel. The audit service must be configured to create log files with the correct group ownership to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and users. If log files are set to be readable and writable only
    SV-90713r1_rule AOSX-12-000334 CCI-000162 MEDIUM The OS X system must be configured with audit log folders group-owned by wheel. The audit service must be configured to create log files with the correct group ownership to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and about users. If log files are set to be readable and writable
    SV-90715r1_rule AOSX-12-000335 CCI-000162 MEDIUM The OS X system must be configured with audit log files set to mode 440 or less permissive. The audit service must be configured to create log files with the correct permissions to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and about users. If log files are set to be readable and writable onl
    SV-90717r1_rule AOSX-12-000336 CCI-000162 MEDIUM The OS X system must be configured with audit log folders set to mode 700 or less permissive. The audit service must be configured to create log folders with the correct permissions to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and users. If log folders are set to be readable and writable only
    SV-90719r1_rule AOSX-12-000337 CCI-000162 MEDIUM The OS X system must be configured so that log files must not contain access control lists (ACLs). The audit service must be configured to create log files with the correct permissions to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and users. If log files are set to be readable and writable only by r
    SV-90721r1_rule AOSX-12-000338 CCI-000162 MEDIUM The OS X system must be configured so that log folders must not contain access control lists (ACLs). The audit service must be configured to create log folders with the correct permissions to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and users. If log folders are set to be readable and writable only
    SV-90723r1_rule AOSX-12-000430 CCI-001749 HIGH The OS X system must have the security assessment policy subsystem enabled. Any changes to the hardware, software, and/or firmware components of the information system and/or application can potentially have significant effects on the overall security of the system. Accordingly, software defined by the organization as critical m
    SV-90725r1_rule AOSX-12-000475 CCI-000381 LOW The OS X system must be configured to disable the application FaceTime. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90727r1_rule AOSX-12-000490 CCI-000381 LOW The OS X system must be configured to disable the application Messages. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90729r1_rule AOSX-12-000505 CCI-000381 LOW The OS X system must be configured to disable the iCloud Calendar services. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90731r1_rule AOSX-12-000507 CCI-000381 LOW The OS X system must be configured to disable the iCloud Reminders services. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90733r1_rule AOSX-12-000510 CCI-000381 LOW The OS X system must be configured to disable iCloud Address Book services. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90735r1_rule AOSX-12-000515 CCI-000381 LOW The OS X system must be configured to disable the Mail iCloud services. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90737r1_rule AOSX-12-000517 CCI-000381 LOW The OS X system must be configured to disable the iCloud Notes services. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90739r1_rule AOSX-12-000518 CCI-000381 MEDIUM The OS X system must be configured to disable the camera. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90741r1_rule AOSX-12-000520 CCI-000381 MEDIUM The OS X system must be configured to disable the system preference pane for iCloud. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90743r1_rule AOSX-12-000521 CCI-000381 MEDIUM The OS X system must be configured to disable the system preference pane for Internet Accounts. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90745r1_rule AOSX-12-000522 CCI-000381 MEDIUM The OS X system must be configured to disable the system preference pane for Siri. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90747r1_rule AOSX-12-000523 CCI-000381 MEDIUM The OS X system must be configured to disable Siri and dictation. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90749r1_rule AOSX-12-000530 CCI-000382 MEDIUM The OS X system must be configured to disable sending diagnostic and usage data to Apple. To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/proto
    SV-90751r1_rule AOSX-12-000531 CCI-000381 MEDIUM The OS X system must be configured to disable the Find My Mac iCloud service. To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/proto
    SV-90753r1_rule AOSX-12-000535 CCI-000381 MEDIUM The OS X system must be configured to disable Location Services. To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/proto
    SV-90755r1_rule AOSX-12-000545 CCI-000381 MEDIUM The OS X system must be configured to disable Bonjour multicast advertising. To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/proto
    SV-90757r1_rule AOSX-12-000550 CCI-000381 MEDIUM The OS X system must be configured to disable the UUCP service. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90759r2_rule AOSX-12-000565 CCI-000770 MEDIUM The OS X system must require individuals to be authenticated with an individual authenticator prior to using a group authenticator. Administrator users must never log in directly as root. To assure individual accountability and prevent unauthorized access, logging in as root over a remote connection must be disabled. Administrators should only run commands as root after first authenti
    SV-90761r1_rule AOSX-12-000570 CCI-001941 MEDIUM The OS X system must implement NSA-approved cryptography to protect classified information in accordance with applicable federal laws, Executive Orders, directives, policies, regulations, and standards. Use of weak or untested encryption algorithms undermines the purposes of using encryption to protect data. The operating system must implement cryptographic modules adhering to the higher standards approved by the federal government since this provides as
    SV-90763r1_rule AOSX-12-000585 CCI-000194 MEDIUM The OS X system must enforce password complexity by requiring that at least one numeric character be used. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password
    SV-90765r1_rule AOSX-12-000587 CCI-001619 MEDIUM The OS X system must enforce password complexity by requiring that at least one special character be used. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity or strength is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password com
    SV-90767r1_rule AOSX-12-000590 CCI-000205 MEDIUM The OS X system must enforce a minimum 15-character password length. The minimum password length must be set to 15 characters. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password length is one factor of several that helps to d
    SV-90769r1_rule AOSX-12-000605 CCI-000197 HIGH The OS X system must not use telnet. The "telnet" service must be disabled as it sends all data in a clear-text form that can be easily intercepted and read. The data needs to be protected at all times during transmission, and encryption is the standard method for protecting data in transit.
    SV-90771r1_rule AOSX-12-000606 CCI-000197 HIGH The OS X system must not use unencrypted FTP. The "ftp" service must be disabled as it sends all data in a clear-text form that can be easily intercepted and read. The data needs to be protected at all times during transmission, and encryption is the standard method for protecting data in transit.
    SV-90773r1_rule AOSX-12-000710 CCI-001749 MEDIUM The OS X system must allow only applications downloaded from the App Store to run. Gatekeeper settings must be configured correctly to only allow the system to run applications downloaded from the Mac App Store or applications signed with a valid Apple Developer ID code. Administrator users will still have the option to override these s
    SV-90775r1_rule AOSX-12-000711 CCI-000366 MEDIUM The OS X system must be configured so that end users cannot override Gatekeeper settings. Gatekeeper must be configured with a configuration profile to prevent normal users from overriding its setting. If users are allowed to disable Gatekeeper or set it to a less restrictive setting, malware could be introduced into the system. Gatekeeper is
    SV-90777r1_rule AOSX-12-000720 CCI-001133 MEDIUM The OS X system must be configured with the SSH daemon ClientAliveInterval option set to 900 or less. SSH should be configured to log users out after a 15-minute interval of inactivity and to wait only 30 seconds before timing out logon attempts. Terminating an idle session within a short time period reduces the window of opportunity for unauthorized pers
    SV-90779r1_rule AOSX-12-000721 CCI-001133 MEDIUM The OS X system must be configured with the SSH daemon ClientAliveCountMax option set to 0. SSH should be configured to log users out after a 15-minute interval of inactivity and to wait only 30 seconds before timing out logon attempts. Terminating an idle session within a short time period reduces the window of opportunity for unauthorized pers
    SV-90781r1_rule AOSX-12-000722 CCI-001133 MEDIUM The OS X system must be configured with the SSH daemon LoginGraceTime set to 30 or less. SSH should be configured to log users out after a 15-minute interval of inactivity and to wait only 30 seconds before timing out logon attempts. Terminating an idle session within a short time period reduces the window of opportunity for unauthorized pers
    SV-90783r1_rule AOSX-12-000750 CCI-000185 MEDIUM The OS X system must issue or obtain public key certificates under an appropriate certificate policy from an approved service provider. DoD-approved certificates must be installed to the System Keychain so they will be available to all users. For user certificates, each organization obtains certificates from an approved, shared service provider, as required by OMB policy. For federal age
    SV-90785r1_rule AOSX-12-000780 CCI-001199 MEDIUM The OS X system must implement cryptographic mechanisms to protect the confidentiality and integrity of all information at rest. Information at rest refers to the state of information when it is located on a secondary storage device (e.g., disk drive and tape drive) within an organizational information system. Mobile devices, laptops, desktops, and storage devices can be lost or st
    SV-90787r1_rule AOSX-12-000835 CCI-001233 MEDIUM The OS X system must employ automated mechanisms to determine the state of system components with regard to flaw remediation using the following frequency: continuously where HBSS is used; 30 days for any additional internal network scans not covered by HBSS; and annually for external scans by Computer Network Defense Service Provider (CNDSP). An approved tool for continuous network scanning must be installed and configured to run. Without the use of automated mechanisms to scan for security flaws on a continuous and/or periodic basis, the operating system or other system components may remain
    SV-90789r1_rule AOSX-12-000850 CCI-000366 MEDIUM The OS X system must restrict the ability of individuals to use USB storage devices. External hard drives, such as USB, must be disabled for users. USB hard drives are a potential vector for malware and can be used to exfiltrate sensitive data if an approved data-loss prevention (DLP) solution is not installed.
    SV-90791r1_rule AOSX-12-000862 CCI-000366 MEDIUM The OS X system must be configured with the usbmuxd daemon disabled. Connections to unauthorized iOS devices (iPhones, iPods, and iPads) open the system to possible compromise via exfiltration of system data. Disabling the "usbmuxd" daemon blocks connections to iOS devices.
    SV-90793r1_rule AOSX-12-000925 CCI-000366 MEDIUM The OS X system must not allow an unattended or automatic logon to the system. When automatic logons 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 to log on. Disabling a
    SV-90795r1_rule AOSX-12-000930 CCI-000366 MEDIUM The OS X system logon window must be configured to prompt for username and password, rather than show a list of users. The logon 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 at the logon screen. This gives an advantage to an attacker with physical access to the system, as the attack
    SV-90797r1_rule AOSX-12-000950 CCI-000366 MEDIUM The OS X firewall must have logging enabled. Firewall logging must be enabled. This ensures that malicious network activity will be logged to the system.
    SV-90799r1_rule AOSX-12-000955 CCI-000366 MEDIUM The OS X system must be configured so that Bluetooth devices are not allowed to wake the computer. A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented a
    SV-90801r1_rule AOSX-12-000965 CCI-000366 MEDIUM The OS X system must be configured with Bluetooth Sharing disabled. Bluetooth sharing allows users to wirelessly transmit files between the OS X 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.
    SV-90803r1_rule AOSX-12-000975 CCI-000382 MEDIUM The OS X system must be configured to disable Remote Apple Events. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-90805r1_rule AOSX-12-000995 CCI-000366 HIGH The OS X system must be configured with the sudoers file configured to authenticate users on a per -tty basis. The "sudo" command must be configured to prompt for the administrator user's password at least once in each newly opened Terminal window or remote logon session, as this prevents a malicious user from taking advantage of an unlocked computer or an abandon
    SV-90807r1_rule AOSX-12-001080 CCI-000366 MEDIUM The OS X Application Firewall must be enabled. The Application Firewall is the built-in firewall that comes with OS X and must be enabled. Firewalls protect computers from network attacks by blocking or limiting access to open network ports. Application firewalls limit which applications are allowed t
    SV-90809r1_rule AOSX-12-001110 CCI-000366 MEDIUM The OS X system must be configured with all public directories owned by root or an application account. All public directories must be owned by "root", the local admin user, or an application account. Directory owners have permission to delete any files contained in that directory, even if the files are owned by other user accounts. By setting the owner to
    SV-90811r1_rule AOSX-12-001115 CCI-000366 MEDIUM The OS X system must be configured with the finger service disabled. The "finger" service has had several security vulnerabilities in the past and is not a necessary service. It is disabled by default; enabling it would increase the attack surface of the system.
    SV-90813r1_rule AOSX-12-001120 CCI-000366 MEDIUM The OS X system must be configured with the sticky bit set on all public directories. The sticky bit must be set on all public directories, as it prevents users with write access to the directory from deleting or renaming files that belong to other users inside it.
    SV-90815r1_rule AOSX-12-001125 CCI-000366 MEDIUM The OS X system must be configured with the prompt for Apple ID and iCloud disabled. The prompt for Apple ID and iCloud must be disabled, as it might mislead new users into creating unwanted Apple IDs and iCloud storage accounts upon their first logon.
    SV-90817r1_rule AOSX-12-001130 CCI-000366 MEDIUM The OS X system must be configured so that users do not have Apple IDs signed into iCloud. Users should not sign into iCloud, as this leads to the possibility that sensitive data could be saved to iCloud storage or that users could inadvertently introduce viruses or malware previously saved to iCloud from other systems.
    SV-90819r1_rule AOSX-12-001140 CCI-000366 LOW The OS X system must be configured with iTunes Music Sharing disabled. When iTunes Music 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. Unnecessary network services should always be disabled because they increase
    SV-90821r1_rule AOSX-12-001145 CCI-000366 MEDIUM All setuid executables on the OS X system must be documented. Very few of the executables that come preinstalled on the OS X have the "setuid" bit set, and administrators should never add the "setuid" bit to any executable that does not already have it set by the vendor. Executables with the "setuid" bit set allow a
    SV-90823r1_rule AOSX-12-001200 CCI-000366 MEDIUM The OS X system must ignore IPv4 ICMP redirect messages. ICMP redirects are broadcast to reshape network traffic. A malicious user could craft fake redirect packets and try to force all network traffic to pass through a network sniffer. If the system is not configured to ignore these packets, it could be suscep
    SV-90825r1_rule AOSX-12-001205 CCI-000366 MEDIUM The OS X system must not have IP forwarding for IPv4 enabled. IP forwarding for IPv4 must not be enabled, as only authorized systems should be permitted to operate as routers.
    SV-90827r1_rule AOSX-12-001206 CCI-000366 MEDIUM The OS X system must not have IP forwarding for IPv6 enabled. IP forwarding for IPv6 must not be enabled, as only authorized systems should be permitted to operate as routers.
    SV-90829r1_rule AOSX-12-001210 CCI-000366 MEDIUM The OS X system must not send IPv4 ICMP redirects by default. ICMP redirects are broadcast to reshape network traffic. A malicious user could use the system to send fake redirect packets and try to force all network traffic to pass through a network sniffer. Disabling ICMP redirect broadcasts mitigates this risk.
    SV-90831r1_rule AOSX-12-001211 CCI-000366 MEDIUM The OS X system must not send IPv6 ICMP redirects by default. ICMP redirects are broadcast to reshape network traffic. A malicious user could use the system to send fake redirect packets and try to force all network traffic to pass through a network sniffer. Disabling ICMP redirect broadcasts mitigates this risk.
    SV-90833r1_rule AOSX-12-001215 CCI-000366 MEDIUM The OS X system must prevent local applications from generating source-routed packets. A source-routed packet attempts to specify the network path that the system should take. If the system is not configured to block the sending of source-routed packets, an attacker can redirect the system's network traffic.
    SV-90835r1_rule AOSX-12-001220 CCI-000366 MEDIUM The OS X system must not process Internet Control Message Protocol [ICMP] timestamp requests. ICMP timestamp requests reveal information about the system and can be used to determine which operating system is installed. Precise time data can also be used to launch time-based attacks against the system. Configuring the system to drop incoming ICMPv
    SV-90837r1_rule AOSX-12-001235 CCI-000366 MEDIUM The OS X system must have unused network devices disabled. If an unused network device is left enabled, a user might be able to activate it at a later time. Unused network devices should be disabled.
    SV-90839r1_rule AOSX-12-001270 CCI-000381 MEDIUM The OS X system must be configured to disable Internet Sharing. To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/proto
    SV-90841r1_rule AOSX-12-001275 CCI-000381 MEDIUM The OS X system must be configured to disable Web Sharing. To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/proto
    SV-90843r1_rule AOSX-12-001324 CCI-002238 MEDIUM The OS X system must enforce an account lockout time period of 15 minutes in which a user makes three consecutive invalid logon attempts. Setting a lockout time period of 15 minutes is an effective deterrent against brute forcing that also makes allowances for legitimate mistakes by users. When three invalid logon attempts are made, the account will be locked.
    SV-90845r1_rule AOSX-12-001325 CCI-000044 MEDIUM The OS X system must enforce account lockout after the limit of three consecutive invalid logon attempts by a user during a 15-minute time period. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute forcing, is reduced. Limits are imposed by locking the account.
    SV-90847r1_rule AOSX-12-001326 CCI-002238 MEDIUM The OS X system must automatically lock the account when three unsuccessful logon attempts in 15 minutes are exceeded. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute forcing, is reduced. Limits are imposed by locking the account. Setting a lockout expiration of 15 minutes is an e
    SV-90849r1_rule AOSX-12-001355 CCI-000140 MEDIUM The OS X system must shut down by default upon audit failure (unless availability is an overriding concern). The audit service should shut down the computer if it is unable to audit system events. Once audit failure occurs, user and system activity is no longer recorded and malicious activity could go undetected. Audit processing failures include software/hardwa
    SV-90851r1_rule AOSX-12-001465 CCI-000366 HIGH The OS X system must use a DoD anti-virus program. An approved anti-virus product must be installed and configured to run. Malicious software can establish a base on individual desktops and servers. Employing an automated mechanism to detect this type of software will aid in elimination of the software f
    SV-90853r1_rule AOSX-12-002050 CCI-000381 LOW The OS X system must be configured to disable AirDrop. To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/proto
    SV-90855r1_rule AOSX-12-002060 CCI-000366 MEDIUM The OS X system must be integrated into a directory services infrastructure. Distinct user account databases on each separate system cause problems with username and password policy enforcement. Most approved directory services infrastructure solutions allow centralized management of users and passwords.
    SV-90857r1_rule AOSX-12-002085 CCI-000199 MEDIUM The OS X system must enforce a 60-day maximum password lifetime restriction. Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. One method of minimizing this risk is to use complex passwords and periodically change them. If the operating system does not limit the
    SV-90859r1_rule AOSX-12-002090 CCI-000200 MEDIUM The OS X system must prohibit password reuse for a minimum of five generations. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If the information system or application allows the user to consecutively reuse their password when that password
    SV-90861r1_rule AOSX-12-002105 CCI-001314 MEDIUM The OS X system must be configured with system log files owned by root and group-owned by wheel or admin. System logs should only be readable by root or admin users. System logs frequently contain sensitive information that could be used by an attacker. Setting the correct owner mitigates this risk.
    SV-90863r1_rule AOSX-12-002106 CCI-001314 MEDIUM The OS X system must be configured with system log files set to mode 640 or less permissive. System logs should only be readable by root or admin users. System logs frequently contain sensitive information that could be used by an attacker. Setting the correct permissions mitigates this risk.
    SV-90865r1_rule AOSX-12-002107 CCI-001314 MEDIUM The OS X system must be configured with access control lists (ACLs) for system log files to be set correctly. System logs should only be readable by root or admin users. System logs frequently contain sensitive information that could be used by an attacker. Setting the correct ACLs mitigates this risk.
    SV-90867r1_rule AOSX-12-002110 CCI-000172 MEDIUM The OS X system must audit the enforcement actions used to restrict access associated with changes to the system. By auditing access restriction enforcement, changes to application and OS configuration files can be audited. Without auditing the enforcement of access restrictions, it will be difficult to identify attempted attacks and an audit trail will not be availa
    SV-90869r1_rule AOSX-12-030014 CCI-000058 MEDIUM The OS X system must be configured to lock the user session when a smart token is removed. A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented a
    SV-90871r1_rule AOSX-12-362149 CCI-001812 MEDIUM The OS X system must prohibit user installation of software without explicit privileged status. Allowing regular users to install software, without explicit privileges, creates the risk that untested or potentially malicious software will be installed on the system. Explicit privileges (escalated or administrative privileges) provide the regular use
    SV-90957r1_rule AOSX-12-001195 CCI-000366 MEDIUM The OS X system must not accept source-routed IPv4 packets. A source-routed packet attempts to specify the network path the packet should take. If the system is not configured to block the incoming source-routed packets, an attacker can redirect the system's network traffic. Configuring the system to drop incoming