Set Maximum Connection Limits for Server and per User

低级别 1人工审核mysql

说明

Limiting concurrent connections to a MySQL server can be used to reduce risk of Denial of Service (DoS) attacks performed by exhausting connection resources.

检查方式

审计方法: 人工审核

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Run SELECT VARIABLE_NAME, VARIABLE_VALUE FROM performance_schema.global_variables WHERE VARIABLE_NAME LIKE 'max_%connections'; (max_user_connections 0 = no limit) and SELECT user, host, max_user_connections FROM mysql.user WHERE user NOT LIKE 'mysql.%' AND user <> 'root'; (0 = global value applies). No server or per-user limit is a fail.

修复方式

修复方法: 操作指南或基础设施补丁

Set max_connections and max_user_connections under [mysqld] (SET GLOBAL to apply now) and per account with ALTER USER '<user>'@'<host>' WITH MAX_USER_CONNECTIONS <n>;

属性

操作系统: 任意
标签: mysqldatabaseavailabilitymanual
参考: CIS Oracle MySQL Community Server 8.4 Benchmark v1.1.0 - 8.3 Set Maximum Connection Limits for Server and per User