Ensure SSH LoginGraceTime is set to one minute or less

低级别 2自动化cos

说明

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.

检查方式

审计方法: Shell 命令

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

预期输出: compliant

修复方式

修复方法: 操作指南或基础设施补丁

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

属性

操作系统: 任意
标签: container-optimized-oscosloggingssh
参考: CIS Google Container-Optimized OS Benchmark v1.2.0 - 5.1.17 Ensure SSH LoginGraceTime is set to one minute or less

检查本机

请在您有权审计的机器上运行此命令。扫描为只读操作。

shell

tmaegis scan --target cos --level 2