The macOS system must display the Standard Mandatory DoD Notice and Consent Banner before granting access to the system via SSH.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-252450	APPL-12-000024	SV-252450r858503_rule		Medium

Description
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

Description

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

STIG	Date
Apple macOS 12 (Monterey) Security Technical Implementation Guide	2023-08-28

Details

Check Text ( C-55906r858502_chk )
If SSH is not being used, this is Not Applicable. For systems that allow remote access through SSH, run the following command to verify that "/etc/banner" is displayed before granting access: /usr/bin/grep -r Banner /etc/ssh/sshd_config* Banner /etc/banner If the sshd Banner configuration option does not point to "/etc/banner", this is a finding. If conflicting results are returned, this is a finding.

Check Text ( C-55906r858502_chk )

If SSH is not being used, this is Not Applicable.

For systems that allow remote access through SSH, run the following command to verify that "/etc/banner" is displayed before granting access:

/usr/bin/grep -r Banner /etc/ssh/sshd_config*

Banner /etc/banner

If the sshd Banner configuration option does not point to "/etc/banner", this is a finding.
If conflicting results are returned, this is a finding.

Fix Text (F-55856r816163_fix)
For systems that allow remote access through SSH run the following command: # /usr/bin/sudo /usr/bin/sed -i.bak 's/^#Banner.*/Banner \/etc\/banner/' /etc/ssh/sshd_config