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Objective ID
Severity
Discussion
V-214802
low
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 information or reveal the contents of the locked session screen. Publicly viewable images can include static or dynamic images such as patterns used with screen savers, photographic images, solid colors, a clock, a battery life indicator, or a blank screen.
V-214803
medium
Although hot corners can be used to initiate a session lock or launch useful applications, they can also be configured to disable an automatic session lock from initiating. Such a configuration introduces the risk that a user might forget to manually lock the screen before stepping away from the computer.
A session time-out 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 log out because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, operating systems need to be able to identify when a user's session has idled and take action to initiate the session lock.
A session time-out 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 log out because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, operating systems need to be able to identify when a user's session has idled and take action to initiate the session lock.
V-214804
medium
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.
V-214805
medium
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 time-out 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 log out because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, operating systems need to be able to identify when a user's session has idled and take action to initiate the session lock.
A session time-out 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 log out because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, operating systems need to be able to identify when a user's session has idled and take action to initiate the session lock.
V-214806
medium
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.
V-214807
medium
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.
V-214808
medium
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 elevated privileges in order to proceed. Auditing successful and unsuccessful attempts to switch to another user account and the escalation of privileges mitigates this risk.
Satisfies: SRG-OS-000032-GPOS-00013, SRG-OS-000064-GPOS-00033, SRG-OS-000462-GPOS-00206
Satisfies: SRG-OS-000032-GPOS-00013, SRG-OS-000064-GPOS-00033, SRG-OS-000462-GPOS-00206
V-214809
high
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 information system) communicating through an external, non-organization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless.
Encryption provides a means to secure the remote connection to prevent unauthorized access to the data traversing the remote access connection (e.g., Remote Desktop Protocol [RDP]), thereby providing a degree of confidentiality. The encryption strength of a mechanism is selected based on the security categorization of the information.
Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188, SRG-OS-000425-GPOS-00189, SRG-OS-000426-GPOS-00190
Remote access is access to DoD non-public information systems by an authorized user (or an information system) communicating through an external, non-organization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless.
Encryption provides a means to secure the remote connection to prevent unauthorized access to the data traversing the remote access connection (e.g., Remote Desktop Protocol [RDP]), thereby providing a degree of confidentiality. The encryption strength of a mechanism is selected based on the security categorization of the information.
Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188, SRG-OS-000425-GPOS-00189, SRG-OS-000426-GPOS-00190
V-214810
high
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.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The "rshd" service must be disabled.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The "rshd" service must be disabled.
V-214812
low
The Bluetooth kernel extension must be disabled, as wireless access introduces unnecessary security risks. Disabling Bluetooth support with a configuration profile mitigates this risk.
V-214813
medium
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
Satisfies: SRG-OS-000300-GPOS-00118, SRG-OS-000480-GPOS-00227
V-214814
medium
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.
V-214815
medium
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 mitigates this risk.
V-214816
medium
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 DVDs mitigates this risk.
V-214817
medium
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 mitigates this risk.
V-214818
medium
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 CDs mitigates this risk.
V-214819
medium
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 DVDs mitigates this risk.
V-214820
medium
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 account creation.
Temporary accounts are established as part of normal account activation procedures when there is a need for short-term accounts without the demand for immediacy in account activation.
If temporary accounts are used, the operating system must be configured to automatically terminate these types of accounts after a DoD-defined time period of 72 hours.
To address access requirements, many operating systems may be integrated with enterprise-level authentication/access mechanisms that meet or exceed access control policy requirements.
Temporary accounts are established as part of normal account activation procedures when there is a need for short-term accounts without the demand for immediacy in account activation.
If temporary accounts are used, the operating system must be configured to automatically terminate these types of accounts after a DoD-defined time period of 72 hours.
To address access requirements, many operating systems may be integrated with enterprise-level authentication/access mechanisms that meet or exceed access control policy requirements.
V-214821
medium
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 automatically disabled, system maintenance during emergencies may not be possible, thus adversely affecting system availability.
Emergency administrator accounts are different from infrequently used accounts (i.e., local logon accounts used by system administrators when network or normal logon/access 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.
Emergency administrator accounts are different from infrequently used accounts (i.e., local logon accounts used by system administrators when network or normal logon/access 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.
V-214822
medium
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 records can be generated from various components within the information system (e.g., module or policy filter).
Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000327-GPOS-00127, SRG-OS-000392-GPOS-00172, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000476-GPOS-00221, SRG-OS-000477-GPOS-00222
Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000327-GPOS-00127, SRG-OS-000392-GPOS-00172, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000476-GPOS-00221, SRG-OS-000477-GPOS-00222
V-214823
medium
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.
V-214824
medium
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.
V-214825
medium
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 service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.
V-214826
medium
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 service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.
V-214827
medium
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 service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.
V-214828
medium
An approved firewall must be installed and enabled to work in concert with the macOS Application Firewall. When configured correctly, firewalls protect computers from network attacks by blocking or limiting access to open network ports.
V-214829
medium
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, standards, and guidance.
System use notifications are required only for access via logon interfaces with human users and are not required when such human interfaces do not exist.
The banner must be formatted in accordance with DTM-08-060.
System use notifications are required only for access via logon interfaces with human users and are not required when such human interfaces do not exist.
The banner must be formatted in accordance with DTM-08-060.
V-214830
medium
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, standards, and guidance.
System use notifications are required only for access via logon interfaces with human users and are not required when such human interfaces do not exist.
The banner must be formatted in accordance with DTM-08-060.
Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000024-GPOS-00007
System use notifications are required only for access via logon interfaces with human users and are not required when such human interfaces do not exist.
The banner must be formatted in accordance with DTM-08-060.
Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000024-GPOS-00007
V-214831
medium
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, standards, and guidance.
System use notifications are required only for access via logon interfaces with human users and are not required when such human interfaces do not exist.
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
System use notifications are required only for access via logon interfaces with human users and are not required when such human interfaces do not exist.
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
V-214832
medium
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 records can be generated from various components within the information system (e.g., module or policy filter).
Satisfies: SRG-OS-000470-GPOS-00214, SRG-OS-000472-GPOS-00217, SRG-OS-000473-GPOS-00218, SRG-OS-000475-GPOS-00220
Audit records can be generated from various components within the information system (e.g., module or policy filter).
Satisfies: SRG-OS-000470-GPOS-00214, SRG-OS-000472-GPOS-00217, SRG-OS-000473-GPOS-00218, SRG-OS-000475-GPOS-00220
V-214833
medium
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 requirement includes, for example, time stamps, source and destination addresses, user/process identifiers, event descriptions, success/fail indications, filenames involved, and access control or flow control rules invoked.
Associating event types with detected events in the operating system audit logs provides a means of investigating an attack, recognizing resource utilization or capacity thresholds, or identifying an improperly configured operating system.
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-000255-GPOS-00096, SRG-OS-000299-GPOS-00117, SRG-OS-000303-GPOS-00120, SRG-OS-000358-GPOS-00145, SRG-OS-000359-GPOS-00146
Audit record content that may be necessary to satisfy this requirement includes, for example, time stamps, source and destination addresses, user/process identifiers, event descriptions, success/fail indications, filenames involved, and access control or flow control rules invoked.
Associating event types with detected events in the operating system audit logs provides a means of investigating an attack, recognizing resource utilization or capacity thresholds, or identifying an improperly configured operating system.
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-000255-GPOS-00096, SRG-OS-000299-GPOS-00117, SRG-OS-000303-GPOS-00120, SRG-OS-000358-GPOS-00145, SRG-OS-000359-GPOS-00146
V-214834
medium
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 software libraries, limit the ability of non-privileged users to grant other users direct access to the contents of their home directories/folders.
SIP also ensures the presence of an audit record generation capability for DoD-defined auditable events for all operating system components, supports on-demand and after-the-fact reporting requirements, does not alter original content or time ordering of audit records.
Satisfies: SRG-OS-000051-GPOS-00024, SRG-OS-000054-GPOS-00025, SRG-OS-000062-GPOS-00031, 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-000348-GPOS-00136, SRG-OS-000349-GPOS-00137, SRG-OS-000350-GPOS-00138, SRG-OS-000351-GPOS-00139, SRG-OS-000352-GPOS-00140, SRG-OS-000353-GPOS-00141, SRG-OS-000354-GPOS-00142, SRG-OS-000480-GPOS-00228, SRG-OS-000480-GPOS-00230
SIP also ensures the presence of an audit record generation capability for DoD-defined auditable events for all operating system components, supports on-demand and after-the-fact reporting requirements, does not alter original content or time ordering of audit records.
Satisfies: SRG-OS-000051-GPOS-00024, SRG-OS-000054-GPOS-00025, SRG-OS-000062-GPOS-00031, 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-000348-GPOS-00136, SRG-OS-000349-GPOS-00137, SRG-OS-000350-GPOS-00138, SRG-OS-000351-GPOS-00139, SRG-OS-000352-GPOS-00140, SRG-OS-000353-GPOS-00141, SRG-OS-000354-GPOS-00142, SRG-OS-000480-GPOS-00228, SRG-OS-000480-GPOS-00230
V-214835
medium
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 the log data is at least seven days old.
V-214836
medium
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 percent, security personnel are notified immediately when the storage volume is 75 percent full and are able to plan for audit record storage capacity expansion.
When "minfree" is set to 25 percent, security personnel are notified immediately when the storage volume is 75 percent full and are able to plan for audit record storage capacity expansion.
V-214837
medium
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 logs as required. Without a real-time alert, security personnel may be unaware of an impending failure of the audit capability and system operation may be adversely affected.
V-214838
medium
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. Sources outside of the configured acceptable allowance (drift) may be inaccurate.
Synchronizing internal information system clocks provides uniformity of time stamps for information systems with multiple system clocks and systems connected over a network.
Organizations should consider endpoints that may not have regular access to the authoritative time server (e.g., mobile, teleworking, and tactical endpoints).
Satisfies: SRG-OS-000355-GPOS-00143, SRG-OS-000356-GPOS-00144
Synchronizing internal information system clocks provides uniformity of time stamps for information systems with multiple system clocks and systems connected over a network.
Organizations should consider endpoints that may not have regular access to the authoritative time server (e.g., mobile, teleworking, and tactical endpoints).
Satisfies: SRG-OS-000355-GPOS-00143, SRG-OS-000356-GPOS-00144
V-214839
medium
The audit service must be configured to create log files with the correct ownership to prevent regular 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 root or administrative users with sudo, the risk is mitigated.
V-214840
medium
The audit service must be configured to create log files with the correct ownership to prevent regular 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 by root or administrative users with sudo, the risk is mitigated.
V-214841
medium
The audit service must be configured to create log files with the correct group ownership to prevent regular 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 root or administrative users with sudo, the risk is mitigated.
V-214842
medium
The audit service must be configured to create log files with the correct group ownership to prevent regular 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 by root or administrative users with sudo, the risk is mitigated.
V-214843
medium
The audit service must be configured to create log files with the correct permissions to prevent regular 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 by root or administrative users with sudo, the risk is mitigated.
V-214844
medium
The audit service must be configured to create log folders with the correct permissions to prevent regular 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 root or administrative users with sudo, the risk is mitigated.
Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029
Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029
V-214845
medium
The audit service must be configured to create log files with the correct permissions to prevent regular 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 root or administrative users with sudo, the risk is mitigated.
V-214846
medium
The audit service must be configured to create log folders with the correct permissions to prevent regular 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 root or administrative users with sudo, the risk is mitigated.
V-214847
high
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 must be signed with a certificate that is recognized and approved by the organization.
Accordingly, software defined by the organization as critical must be signed with a certificate that is recognized and approved by the organization.
V-214848
low
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.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The application FaceTime establishes connections to Apple's iCloud, despite using security controls to disable iCloud access.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The application FaceTime establishes connections to Apple's iCloud, despite using security controls to disable iCloud access.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214849
low
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.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The application Messages establishes connections to Apple's iCloud, despite using security controls to disable iCloud access.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The application Messages establishes connections to Apple's iCloud, despite using security controls to disable iCloud access.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214850
low
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.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The application Calendar establishes connections to Apple's iCloud, despite using security controls to disable iCloud access.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The application Calendar establishes connections to Apple's iCloud, despite using security controls to disable iCloud access.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214851
low
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.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The application Reminders establishes connections to Apple's iCloud, despite using security controls to disable iCloud access.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The application Reminders establishes connections to Apple's iCloud, despite using security controls to disable iCloud access.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214852
low
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.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The application Address Book establishes connections to Apple's iCloud, despite using security controls to disable iCloud access.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The application Address Book establishes connections to Apple's iCloud, despite using security controls to disable iCloud access.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214853
low
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.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The application Mail establishes connections to Apple's iCloud, despite using security controls to disable iCloud access.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The application Mail establishes connections to Apple's iCloud, despite using security controls to disable iCloud access.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214854
low
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.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The application Notes establishes connections to Apple's iCloud, despite using security controls to disable iCloud access.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The application Notes establishes connections to Apple's iCloud, despite using security controls to disable iCloud access.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214855
medium
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 actually carry out the disconnect activity without having to go through complex and tedious procedures.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
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 actually carry out the disconnect activity without having to go through complex and tedious procedures.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214856
high
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.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The system preference panes for iCloud and Internet Accounts must be disabled.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The system preference panes for iCloud and Internet Accounts must be disabled.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214857
medium
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.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The system preference panes for iCloud and Internet Accounts must be disabled.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The system preference panes for iCloud and Internet Accounts must be disabled.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214858
medium
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.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The system preference panes for Siri and dictation must be disabled.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The system preference panes for Siri and dictation must be disabled.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214859
medium
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.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The system preference panes for Siri and dictation must be disabled.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The system preference panes for Siri and dictation must be disabled.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214860
medium
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/protocols on information systems.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
Sending diagnostic and usage data to Apple must be disabled.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
Sending diagnostic and usage data to Apple must be disabled.
V-214861
medium
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/protocols on information systems.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality-of-life issues.
Find My Mac must be disabled.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality-of-life issues.
Find My Mac must be disabled.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214862
medium
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/protocols on information systems.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality-of-life issues.
Location Services must be disabled.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality-of-life issues.
Location Services must be disabled.
V-214863
medium
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/protocols on information systems.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
Bonjour multicast advertising must be disabled on the system.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
Bonjour multicast advertising must be disabled on the system.
V-214864
medium
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.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The system must not have the UUCP service active.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
The system must not have the UUCP service active.
V-214865
medium
The Touch ID feature permits users to add additional fingerprints to unlock the host. These fingerprints may be for the user or anyone else. Because unauthorized users may gain access to the system, the use of Touch ID must be limited.
V-214866
medium
Software update configuration. Point to DOD approved update server. Configure for automatic install of critical updates.
V-214867
medium
To assure individual accountability and prevent unauthorized access, organizational users must be individually identified and authenticated.
V-214868
high
Only authorized individuals should be allowed to obtain access to operating system components. Permitting access via a guest account provides unauthenticated access to any person.
V-214869
high
The "tftp" service must be disabled as it sends all data in a clear-text form that can be easily intercepted and read. The data needs to be protected at all times during transmission, and encryption is the standard method for protecting data in transit.
If the data is not encrypted during transmission, it can be plainly read (i.e., clear text) and easily compromised. Disabling ftp is one way to mitigate this risk. Administrators should be instructed to use an alternate service for data transmission that uses encryption, such as SFTP.
Additionally, the "tftp" service uses UDP, which is not secure.
If the data is not encrypted during transmission, it can be plainly read (i.e., clear text) and easily compromised. Disabling ftp is one way to mitigate this risk. Administrators should be instructed to use an alternate service for data transmission that uses encryption, such as SFTP.
Additionally, the "tftp" service uses UDP, which is not secure.
V-214870
medium
Users (and any processes acting on behalf of users) need to be uniquely identified and authenticated for all accesses other than those accesses explicitly identified and documented by the organization, which outlines specific user actions that can be performed on the Ubuntu operating system without identification or authentication.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214871
medium
The Back to My Mac is an iCloud feature permitting users to connect to a Mac, AirPort Disk, or Time Capsule using another Mac or another Internet connected device. When connected users can transfer data and see a live version of the screen content.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214872
medium
Requiring individuals to be authenticated with an individual authenticator prior to using a group authenticator allows for traceability of actions, as well as adding an additional level of protection of the actions that can be taken with group account knowledge.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214873
medium
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214874
medium
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/protocols on information systems.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214875
medium
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality-of-life issues.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214876
medium
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/protocols on information systems.
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155
V-214877
medium
Administrators 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 authenticating with their individual user names and passwords.
V-214878
medium
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 assurance they have been tested and validated.
Satisfies: SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058, SRG-OS-000396-GPOS-00176
Satisfies: SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058, SRG-OS-000396-GPOS-00176
V-214879
medium
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 complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised.
V-214880
medium
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 complexity is one factor in determining how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised. Special characters are those characters that are not alphanumeric. Examples include: ~ ! @ # $ % ^ *.
V-214881
medium
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 determine strength and how long it takes to crack a password. The use of more characters in a password helps to exponentially increase the time and/or resources required to compromise the password.
V-214882
high
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.
If the data is not encrypted during transmission, it can be plainly read (i.e., clear text) and easily compromised. Disabling telnet is one way to mitigate this risk. Administrators should be instructed to use an alternate service for remote access sessions, non-local maintenance sessions, and diagnostic communications that uses encryption, such as SSH.
Satisfies: SRG-OS-000074-GPOS-00042, SRG-OS-000125-GPOS-00065, SRG-OS-000250-GPOS-00093, SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174
If the data is not encrypted during transmission, it can be plainly read (i.e., clear text) and easily compromised. Disabling telnet is one way to mitigate this risk. Administrators should be instructed to use an alternate service for remote access sessions, non-local maintenance sessions, and diagnostic communications that uses encryption, such as SSH.
Satisfies: SRG-OS-000074-GPOS-00042, SRG-OS-000125-GPOS-00065, SRG-OS-000250-GPOS-00093, SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174
V-214883
high
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.
If the data is not encrypted during transmission, it can be plainly read (i.e., clear text) and easily compromised. Disabling ftp is one way to mitigate this risk. Administrators should be instructed to use an alternate service for data transmission that uses encryption, such as SFTP.
If the data is not encrypted during transmission, it can be plainly read (i.e., clear text) and easily compromised. Disabling ftp is one way to mitigate this risk. Administrators should be instructed to use an alternate service for data transmission that uses encryption, such as SFTP.
V-214884
medium
Gatekeeper settings must be configured correctly to only allow the system to run 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 in order to run. Digital signatures allow the macOS host to verify that the application has not been modified by a malicious third party.
V-214886
medium
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 personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle session or an incomplete logon attempt will also free up resources committed by the managed network element.
V-214887
medium
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 personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle session or an incomplete logon attempt will also free up resources committed by the managed network element.
V-214888
medium
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 personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle session or an incomplete logon attempt will also free up resources committed by the managed network element.
V-214889
medium
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 agencies operating a legacy public key infrastructure cross-certified with the Federal Bridge Certification Authority at medium assurance or higher, this Certification Authority will suffice. This control focuses on certificates with a visibility external to the information system and does not include certificates related to internal system operations; for example, application-specific time services.
Satisfies: SRG-OS-000066-GPOS-00034, SRG-OS-000478-GPOS-00223
For user certificates, each organization obtains certificates from an approved, shared service provider, as required by OMB policy. For federal agencies operating a legacy public key infrastructure cross-certified with the Federal Bridge Certification Authority at medium assurance or higher, this Certification Authority will suffice. This control focuses on certificates with a visibility external to the information system and does not include certificates related to internal system operations; for example, application-specific time services.
Satisfies: SRG-OS-000066-GPOS-00034, SRG-OS-000478-GPOS-00223
V-214890
medium
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 stolen, and the contents of their data storage (e.g., hard drives and non-volatile memory) can be read, copied, or altered. By encrypting the system hard drive, the confidentiality and integrity of any data stored on the system is ensured. FileVault Disk Encryption mitigates this risk.
Satisfies: SRG-OS-000185-GPOS-00079, SRG-OS-000404-GPOS-00183, SRG-OS-000405-GPOS-00184
Satisfies: SRG-OS-000185-GPOS-00079, SRG-OS-000404-GPOS-00183, SRG-OS-000405-GPOS-00184
V-214891
medium
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 vulnerable to the exploits presented by undetected software flaws.
To support this requirement, the operating system may have an integrated solution incorporating continuous scanning using HBSS and periodic scanning using other tools, as specified in the requirement.
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 vulnerable to the exploits presented by undetected software flaws.
To support this requirement, the operating system may have an integrated solution incorporating continuous scanning using HBSS and periodic scanning using other tools, as specified in the requirement.
V-214892
medium
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.
V-214893
medium
Connections to unauthorized iOS devices (e.g., iPhones, iPods, and iPads) open the system to possible compromise via exfiltration of system data. Disabling the iTunes file sharing blocks connections to iOS devices.
V-214894
medium
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 automatic logons mitigates this risk.
V-214895
medium
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 attacker would only have to guess the password for one of the listed accounts.
V-214896
medium
Firewall logging must be enabled. This ensures that malicious network activity will be logged to the system.
V-214897
medium
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 at the point where session activity can be determined.
Regardless of where the session lock is determined and implemented, once invoked, the session lock must remain in place until the user reauthenticates. No other activity aside from reauthentication must unlock the system.
The session lock is implemented at the point where session activity can be determined.
Regardless of where the session lock is determined and implemented, once invoked, the session lock must remain in place until the user reauthenticates. No other activity aside from reauthentication must unlock the system.
V-214898
medium
Bluetooth sharing allows users to wirelessly transmit files between the macOS host 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. Disabling Bluetooth Sharing mitigates this risk.
V-214899
medium
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.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
Remote Apple Events must be disabled.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).
Examples of non-essential capabilities include but are not limited to games, software packages, tools, and demonstration software not related to requirements or providing a wide array of functionality not required for every mission but that cannot be disabled.
Remote Apple Events must be disabled.
V-214900
high
The "sudo" command must be configured to prompt for the administrator's password at least once in each newly opened Terminal window or remote logon session, as this prevents a malicious user from taking advantage of an unlocked computer or an abandoned logon session to bypass the normal password prompt requirement.
Without the "tty_tickets" option, all open local and remote logon sessions would be authenticated to use sudo without a password for the duration of the configured password timeout window.
Without the "tty_tickets" option, all open local and remote logon sessions would be authenticated to use sudo without a password for the duration of the configured password timeout window.
V-214901
medium
The Application Firewall is the built-in firewall that comes with macOS 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 to communicate over the network.
V-214902
medium
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 an administrator or application account, regular users will not be permitted to delete each other's files.
V-214903
medium
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.
V-214904
medium
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.
V-214905
medium
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.
V-214906
medium
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.
V-214907
low
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 the attack surface of the system. Disabling iTunes Music Sharing mitigates this risk.
V-214908
medium
Very few of the executables that come preinstalled on the macOS host 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 anyone that executes them to be temporarily assigned the UID of the file owner. In practice, this almost always is the root account. While some vendors depend on this file attribute for proper operation, security problems can result if "setuid" is assigned to programs allowing reading and writing of files, or shell escapes, as this could lead to unprivileged users gaining privileged access to files and directories on the system.
V-214909
medium
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 source-routed IPv4 packets mitigates this risk.
V-214910
medium
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 susceptible to this kind of attack.
V-214911
medium
IP forwarding for IPv4 must not be enabled, as only authorized systems should be permitted to operate as routers.
V-214912
medium
IP forwarding for IPv6 must not be enabled, as only authorized systems should be permitted to operate as routers.
V-214913
medium
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.
V-214914
medium
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.
V-214915
medium
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.
V-214916
medium
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 ICMPv4 timestamp requests mitigates these risks.
V-214917
medium
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.
V-214918
medium
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/protocols on information systems.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
Internet Sharing must be disabled.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
Internet Sharing must be disabled.
V-214919
medium
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/protocols on information systems.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
Web Sharing is non-essential and must be disabled.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
Web Sharing is non-essential and must be disabled.
V-214920
medium
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.
V-214921
medium
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.
V-214922
medium
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 effective deterrent against brute forcing that also makes allowances for legitimate mistakes by users.
V-214923
medium
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/hardware errors, failures in the audit capturing mechanisms, and audit storage capacity being reached or exceeded. Responses to audit failure depend on the nature of the failure mode.
When availability is an overriding concern, other approved actions in response to an audit failure are as follows:
(i) If the failure was caused by the lack of audit record storage capacity, the operating system must continue generating audit records if possible (automatically restarting the audit service if necessary), overwriting the oldest audit records in a first-in-first-out manner.
(ii) If audit records are sent to a centralized collection server and communication with this server is lost or the server fails, the operating system must queue audit records locally until communication is restored or until the audit records are retrieved manually. Upon restoration of the connection to the centralized collection server, action should be taken to synchronize the local audit data with the collection server.
When availability is an overriding concern, other approved actions in response to an audit failure are as follows:
(i) If the failure was caused by the lack of audit record storage capacity, the operating system must continue generating audit records if possible (automatically restarting the audit service if necessary), overwriting the oldest audit records in a first-in-first-out manner.
(ii) If audit records are sent to a centralized collection server and communication with this server is lost or the server fails, the operating system must queue audit records locally until communication is restored or until the audit records are retrieved manually. Upon restoration of the connection to the centralized collection server, action should be taken to synchronize the local audit data with the collection server.
V-214924
high
An approved antivirus product must be installed and configured to run.
Malicious software can establish a base on individual desktops and servers. Employing an automated mechanism to detect this type of software will aid in elimination of the software from the operating system.
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 from the operating system.
V-214925
low
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/protocols on information systems.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
AirDrop must be disabled.
Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.
To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
AirDrop must be disabled.
V-214926
high
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.
V-214927
medium
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 lifetime of passwords and force users to change their passwords, there is the risk that the operating system passwords could be compromised.
One method of minimizing this risk is to use complex passwords and periodically change them. If the operating system does not limit the lifetime of passwords and force users to change their passwords, there is the risk that the operating system passwords could be compromised.
V-214928
medium
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 has exceeded its defined lifetime, the end result is a password that is not changed as per policy requirements.
V-214929
medium
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.
V-214930
medium
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.
V-214931
medium
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.
V-214932
medium
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 available for forensic investigation.
Enforcement actions are the methods or mechanisms used to prevent unauthorized changes to configuration settings. Enforcement action methods may be as simple as denying access to a file based on the application of file permissions (access restriction). Audit items may consist of lists of actions blocked by access restrictions or changes identified after the fact.
Satisfies: SRG-OS-000365-GPOS-00152, SRG-OS-000458-GPOS-00203, SRG-OS-000461-GPOS-00205, 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-000474-GPOS-00219
Enforcement actions are the methods or mechanisms used to prevent unauthorized changes to configuration settings. Enforcement action methods may be as simple as denying access to a file based on the application of file permissions (access restriction). Audit items may consist of lists of actions blocked by access restrictions or changes identified after the fact.
Satisfies: SRG-OS-000365-GPOS-00152, SRG-OS-000458-GPOS-00203, SRG-OS-000461-GPOS-00205, 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-000474-GPOS-00219
V-214933
medium
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 at the point where session activity can be determined. Rather than be forced to wait for a period of time to expire before the user session can be locked, operating systems need to provide users with the ability to manually invoke a session lock so users may secure their session should they need to temporarily vacate the immediate physical vicinity.
The session lock is implemented at the point where session activity can be determined. Rather than be forced to wait for a period of time to expire before the user session can be locked, operating systems need to provide users with the ability to manually invoke a session lock so users may secure their session should they need to temporarily vacate the immediate physical vicinity.
V-214934
medium
To prevent untrusted certificates the certificates on a smartcard card must be valid in these ways: its issuer is system-trusted, the certificate is not expired, its "valid-after" date is in the past, and it passes CRL and OCSP checking.
V-214935
medium
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 user with explicit capabilities and control that exceeds the rights of a regular user.
Operating system functionality will vary, and while users are not permitted to install unapproved software, there may be instances where the organization allows the user to install approved software packages, such as from an approved software repository.
The operating system or software configuration management utility must enforce control of software installation by users based upon what types of software installations are permitted (e.g., updates and security patches to existing software) and what types of installations are prohibited (e.g., software whose pedigree with regard to being potentially malicious is unknown or suspect) by the organization.
Operating system functionality will vary, and while users are not permitted to install unapproved software, there may be instances where the organization allows the user to install approved software packages, such as from an approved software repository.
The operating system or software configuration management utility must enforce control of software installation by users based upon what types of software installations are permitted (e.g., updates and security patches to existing software) and what types of installations are prohibited (e.g., software whose pedigree with regard to being potentially malicious is unknown or suspect) by the organization.
V-233625
medium
Unapproved mechanisms for authentication to the cryptographic module are not verified, and therefore cannot be relied upon to provide confidentiality or integrity, resulting in the compromise of DoD data.
Operating systems using encryption are required to use FIPS-compliant mechanisms for authenticating to cryptographic modules.
The implementation of OpenSSH that is included with macOS does not utilize a FIPS 140-2 validated cryptographic module. While the listed ciphers are FIPS 140-2 approved algorithms, the module implementing them has not been validated.
By specifying a cipher list with the order of ciphers being in a "strongest to weakest" orientation, the system will automatically attempt to use the strongest cipher for securing SSH connections.
Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000120-GPOS-00061, SRG-OS-000125-GPOS-00065, SRG-OS-000250-GPOS-00093, SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174
Operating systems using encryption are required to use FIPS-compliant mechanisms for authenticating to cryptographic modules.
The implementation of OpenSSH that is included with macOS does not utilize a FIPS 140-2 validated cryptographic module. While the listed ciphers are FIPS 140-2 approved algorithms, the module implementing them has not been validated.
By specifying a cipher list with the order of ciphers being in a "strongest to weakest" orientation, the system will automatically attempt to use the strongest cipher for securing SSH connections.
Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000120-GPOS-00061, SRG-OS-000125-GPOS-00065, SRG-OS-000250-GPOS-00093, SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174
V-233626
medium
Unapproved mechanisms for authentication to the cryptographic module are not verified, and therefore cannot be relied upon to provide confidentiality or integrity, resulting in the compromise of DoD data.
Operating systems using encryption are required to use FIPS-compliant mechanisms for authenticating to cryptographic modules.
The implementation of OpenSSH that is included with macOS does not utilize a FIPS 140-2 validated cryptographic module. While the listed MACs are FIPS 140-2 approved algorithms, the module implementing them has not been validated.
By specifying a Keyed-Hash Message Authentication Code list with the order of hashes being in a "strongest to weakest" orientation, the system will automatically attempt to use the strongest hash for securing SSH connections.
Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000120-GPOS-00061, SRG-OS-000125-GPOS-00065, SRG-OS-000250-GPOS-00093, SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174
Operating systems using encryption are required to use FIPS-compliant mechanisms for authenticating to cryptographic modules.
The implementation of OpenSSH that is included with macOS does not utilize a FIPS 140-2 validated cryptographic module. While the listed MACs are FIPS 140-2 approved algorithms, the module implementing them has not been validated.
By specifying a Keyed-Hash Message Authentication Code list with the order of hashes being in a "strongest to weakest" orientation, the system will automatically attempt to use the strongest hash for securing SSH connections.
Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000120-GPOS-00061, SRG-OS-000125-GPOS-00065, SRG-OS-000250-GPOS-00093, SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174
V-233627
medium
Unapproved mechanisms for authentication to the cryptographic module are not verified, and therefore cannot be relied upon to provide confidentiality or integrity, resulting in the compromise of DoD data.
Operating systems using encryption are required to use FIPS-compliant mechanisms for authenticating to cryptographic modules.
The implementation of OpenSSH that is included with macOS does not utilize a FIPS 140-2 validated cryptographic module. While the listed Key Exchange Algorithms are FIPS 140-2 approved, the module implementing them has not been validated.
By specifying a Key Exchange Algorithm list with the order of hashes being in a "strongest to weakest" orientation, the system will automatically attempt to use the strongest Key Exchange Algorithm for securing SSH connections.
Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000120-GPOS-00061, SRG-OS-000125-GPOS-00065, SRG-OS-000250-GPOS-00093, SRG-OS-000393-GPOS-00173,SRG-OS-000394-GPOS-00174
Operating systems using encryption are required to use FIPS-compliant mechanisms for authenticating to cryptographic modules.
The implementation of OpenSSH that is included with macOS does not utilize a FIPS 140-2 validated cryptographic module. While the listed Key Exchange Algorithms are FIPS 140-2 approved, the module implementing them has not been validated.
By specifying a Key Exchange Algorithm list with the order of hashes being in a "strongest to weakest" orientation, the system will automatically attempt to use the strongest Key Exchange Algorithm for securing SSH connections.
Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000120-GPOS-00061, SRG-OS-000125-GPOS-00065, SRG-OS-000250-GPOS-00093, SRG-OS-000393-GPOS-00173,SRG-OS-000394-GPOS-00174
V-237767
medium
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 and password. Disabling Screen Sharing mitigates this risk.