id: os_sshd_login_grace_time_configure
title: Set Login Grace Time to $ODV
discussion: |
  If SSHD is enabled then it _MUST_ be configured to wait only $ODV seconds before timing out logon attempts.

  NOTE: On macOS 15.2 and higher the SSH configuration can be reset to the macOS default by running /usr/libexec/reset-ssh-configuration.
check: |
  /usr/sbin/sshd -G | /usr/bin/awk '/logingracetime/{print $2}'
result:
  integer: $ODV
fix: |
  [source,bash]
  ----
  include_dir=$(/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 'logingracetime $ODV' "${include_dir}01-mscp-sshd.conf" 2>/dev/null || echo "logingracetime $ODV" >> "${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
  ----
references:
  cce:
    - CCE-94306-8
  cci:
    - CCI-001133
  800-53r5:
    - SC-10
  800-53r4:
    - SC-10
  srg:
    - SRG-OS-000163-GPOS-00072
  disa_stig:
    - APPL-15-000053
  800-171r3:
    - 03.13.09
  cmmc:
    - SC.L2-3.13.9
macOS:
  - '15.0'
odv:
  hint: Number of seconds.
  recommended: 30
  stig: 30
tags:
  - cnssi-1253_low
  - cnssi-1253_high
  - cmmc_lvl2
  - stig
  - cnssi-1253_moderate
severity: medium
mobileconfig: false
mobileconfig_info:
ddm_info:
  declarationtype: com.apple.configuration.services.configuration-files
  service: com.apple.sshd
  config_file: sshd_config
  configuration_key: LoginGraceTime
  configuration_value: $ODV