Ensure SSH LogLevel is appropriate

中级别 1人工审核cos

说明

INFO level is the basic level that only records login activity of SSH users. In many situations, such as Incident Response, it is important to determine when a particular user was active on a system. The logout record can eliminate those users who disconnected, which helps narrow the field. VERBOSE level specifies that login and logout activity as well as the key fingerprint for any SSH key used for login will be logged. This information is important for SSH key management, especially in legacy environments. SSH provides several logging levels with varying amounts of verbosity. DEBUG is specifically not recommended other than strictly for debugging SSH communications since it provides so much data that it is difficult to identify important security information.

检查方式

审计方法: 人工审核

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Run the following command and verify that output matches: # sshd -T | grep loglevel LogLevel VERBOSE OR loglevel INFO

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: LogLevel VERBOSE OR LogLevel INFO

属性

操作系统: 任意
标签: container-optimized-oscosloggingssh
参考: CIS Google Container-Optimized OS Benchmark v1.2.0 - 5.1.5 Ensure SSH LogLevel is appropriate