Rule ID
SV-259472r1009590_rule
Version
V2R3
CCIs
If SSH is enabled to ensure individual accountability and prevent unauthorized access, logging in as root via SSH must be disabled. The macOS system must require individuals to be authenticated with an individual authenticator prior to using a group authenticator, and administrator users must never log in directly as root. 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-000109-GPOS-00056,SRG-OS-000364-GPOS-00151
Verify the macOS system is configured to disable root login for SSH with the following command:
/usr/sbin/sshd -G | /usr/bin/awk '/permitrootlogin/{print $2}'
If the result is not "no", this is a finding.Configure the macOS system to disable root login for SSH with the following command:
include_dir=$(/usr/bin/awk '/^Include/ {print $2}' /etc/ssh/sshd_config | /usr/bin/tr -d '*')
if [[ -z $include_dir ]]; then
/usr/bin/sed -i.bk "1s/.*/Include \/etc\/ssh\/sshd_config.d\/\*/" /etc/ssh/sshd_config
fi
/usr/bin/grep -qxF 'permitrootlogin no' "${include_dir}01-mscp-sshd.conf" 2>/dev/null || echo "permitrootlogin no" >> "${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