Title

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

Discussion

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

Check Content

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

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

Additional Identifiers

Rule ID: SV-252450r858503_rule

Vulnerability ID: V-252450

Group Title: SRG-OS-000023-GPOS-00006

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.