APPL-26-000024 - The macOS system must enforce SSH to display a policy banner.

Warning! Audit Deprecated

This audit has been deprecated and will be removed in a future update.

Information

SSH must be configured to display a policy banner.

Displaying a standardized and approved use notification before granting access to the operating system ensures that users are provided with privacy and security notification verbiage that is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance.

System use notifications are required only for access via login interfaces with human users and are not required when such human interfaces do not exist.

Note: /etc/ssh/sshd_config will be automatically modified to its original state following any update or major upgrade to the operating system.

Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000024-GPOS-00007

Solution

Configure the macOS system to display the contents of "/etc/banner" before granting access to the system with the following command:

include_dir=$(/usr/bin/awk '/^Include/ {print $2}' /etc/ssh/sshd_config | /usr/bin/tr -d '*')

if [[ -z $include_dir ]]; then
/usr/bin/sed -i.bk "1s/.*/Include \/etc\/ssh\/sshd_config.d\/\*/" /etc/ssh/sshd_config
fi

/usr/bin/grep -qxF 'banner /etc/banner' "${include_dir}01-mscp-sshd.conf" 2>/dev/null || echo "banner /etc/banner" >> "${include_dir}01-mscp-sshd.conf"

for file in $(ls ${include_dir}); do
if [[ "$file" == "100-macos.conf" ]]; then
continue
fi
if [[ "$file" == "01-mscp-sshd.conf" ]]; then
break
fi
/bin/mv ${include_dir}${file} ${include_dir}20-${file}
done

Item Details

Audit Name: DISA Apple macOS 26 Tahoe STIG v1r1

Plugin: Unix

Control ID: 91834b1dafd50ee41067159ca6355cf1a270619e73bafb221f8309a160808037

Detections

Analytics

APPL-26-000024 - The macOS system must enforce SSH to display a policy banner.

Warning! Audit Deprecated

Information

Solution

See Also

Item Details