Ensure SSH LoginGraceTime is set to one minute or less

低レベル 2自動cos

説明

The LoginGraceTime parameter specifies the time allowed for successful authentication to the SSH server. The longer the Grace period is the more open unauthenticated connections can exist. Like other session controls in this session the Grace Period should be limited to appropriate organizational limits to ensure the service is available for needed access. Setting the LoginGraceTime parameter to a low number will minimize the risk of successful brute force attacks to the SSH server. It will also limit the number of concurrent unauthenticated connections While the recommended setting is 60 seconds (1 Minute), set the number based on site policy.

チェック方法

監査方法: シェルコマンド

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=$(bash -c 'sshd -T | grep logingracetime' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- 'LoginGraceTime 60' || { echo step1: missing 'LoginGraceTime 60'; return 1; }; }; if alt0; then echo compliant; fi

期待される出力: compliant

修正方法

修正方法: ガイダンスまたは IaC パッチ

Edit the /etc/ssh/sshd_config file to set the parameter as follows: LoginGraceTime 60

プロパティ

オペレーティングシステム: すべて
タグ: container-optimized-oscosloggingssh
参照: CIS Google Container-Optimized OS Benchmark v1.2.0 - 5.1.17 Ensure SSH LoginGraceTime is set to one minute or less

このホストをチェック

監査が許可されているマシンで実行してください。スキャンは読み取り専用です。

shell

tmaegis scan --target cos --level 2