Ensure SSH warning banner is configured

低等級 2自動化cos

說明

The Banner parameter specifies a file whose contents must be sent to the remote user before authentication is permitted. By default, no banner is displayed. Banners are used to warn connecting users of the particular site's policy regarding connection. Presenting a warning message prior to the normal user login may assist the prosecution of trespassers on the computer system.

檢查方式

稽核方法: Shell 指令

shell

alt0() { command -v grep >/dev/null 2>&1 || { echo "step1: grep not installed"; return 1; }; command -v sshd >/dev/null 2>&1 || { echo "step1: sshd not installed"; return 1; }; o=$(bash -c 'sshd -T | grep banner' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- 'Banner /etc/issue.net' || { echo step1: missing 'Banner /etc/issue.net'; return 1; }; }; if alt0; then echo compliant; fi

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

Edit the /etc/ssh/sshd_config file to set the parameter as follows: Banner /etc/issue.net

屬性

作業系統: 不限
標籤: container-optimized-oscosssh
參考資料: CIS Google Container-Optimized OS Benchmark v1.2.0 - 5.1.18 Ensure SSH warning banner is configured

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 cos --level 2