Ensure a Login Window Banner Exists

中等級 2自動化macos

說明

A Login window banner warning informs the user that the system is reserved for authorized use only. It enforces an acknowledgment by the user that they have been informed of the use policy in the banner if required. The system recognizes either the .txt and the .rtf formats. An access warning may reduce a casual attacker's tendency to target the system. Access warnings may also aid in the prosecution of an attacker by evincing the attacker's knowledge of the system's private status, acceptable use policy, and authorization requirements.

檢查方式

稽核方法: Shell 指令

shell

set -- /Library/Security/PolicyBanner.*
[ -e "$1" ] || exit 1
for f in "$@"; do
  p=$(/usr/bin/stat -f %A "$f") || exit 1
  case "$p" in ??4) ;; *) echo "$f mode $p"; exit 0;; esac
done
echo compliant

預期輸出: compliant

修補方式

修補方法: 操作指南或基礎設施修補檔

Terminal Method: Run the following commands to create or edit the login window text and set the proper permissions: Edit (or create) a PolicyBanner.txt or PolicyBanner.rtf file, in the /Library/Security/ folder, to include the required login window banner text. Perform the following to set permissions on the policy banner file: % /usr/bin/sudo /bin/chmod o+r /Library/Security/PolicyBanner.txt % /usr/bin/sudo /bin/chmod o+r /Library/Security/PolicyBanner.rtf Note: If your organization uses an .rtfd file to set the policy banner, run % /usr/bin/sudo /bin/chmod o+rx /Library/Security/PolicyBanner.rtfd to update the permissions.

屬性

作業系統: macos-14
標籤: loggingmacossonoma
參考資料: CIS Apple macOS 14.0 Sonoma Benchmark v3.1.0 - 5.8 Ensure a Login Window Banner Exists

檢查此主機

請在您有權稽核的機器上執行此指令。掃描為唯讀操作。

shell

tmaegis scan --target macos --level 2