TMA-MYSQL-9.2

Ensure 'SOURCE_SSL_VERIFY_SERVER_CERT' is Set to 'YES' or '1'

HighLevel 1Automatedmysql

Description

In the MySQL REPLICA (SLAVE is deprecated as of 8.0.22) context the setting SOURCE_SSL_VERIFY_SERVER_CERT (MASTER_SSL_VERIFY_SERVER_CERT is deprecated as of 8.0.22) indicates whether the REPLICA should verify the SOURCE's certificate. This configuration item may be set to Yes or No, and unless SSL has been enabled on the REPLICA, the value will be ignored. Counts replication channels that do not verify the source certificate; passes on servers that are not replicas. Runs mysql -NBe with the client defaults: put an administrative account in ~/.my.cnf (mode 0600) or a mysql_config_editor login path, not MYSQL_PWD (see 1.4/1.6).

How it is checked

Audit method: SQL query

sql_query

out=$(mysql -NBe "SELECT COUNT(*) FROM mysql.slave_master_info WHERE Ssl_verify_server_cert <> 1" 2>/dev/null) || exit 1; printf '%s\n' "$out"

Expected output: 0

How it is fixed

Fix method: Guidance or infrastructure patch

STOP REPLICA; CHANGE REPLICATION SOURCE TO SOURCE_SSL_VERIFY_SERVER_CERT = 1; START REPLICA;

Properties

Operating systems: Any
Tags: mysqldatabasereplicationtls
Reference: CIS Oracle MySQL Community Server 8.4 Benchmark v1.1.0 - 9.2 Ensure 'SOURCE_SSL_VERIFY_SERVER_CERT' is Set to 'YES' or '1'

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target mysql