Limit Accepted Transport Layer Security (TLS) Versions

HighLevel 2Automatedmysql

Description

MySQL supports multiple protocols of TLS. The higher the version the stronger the security and/or better the performance. Also review performance_schema.status_by_thread (Ssl_version) for clients still negotiating old versions. 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=$(mysql -NBe "SELECT IF(FIND_IN_SET('TLSv1', @@global.tls_version) = 0 AND FIND_IN_SET('TLSv1.1', @@global.tls_version) = 0, 'compliant', 'noncompliant')" 2>/dev/null) || exit 1; printf '%s\n' "$out"

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

Set tls_version=TLSv1.3 (or TLSv1.2,TLSv1.3) under [mysqld] in /etc/my.cnf (or /etc/mysql/mysql.conf.d/mysqld.cnf) (or SET PERSIST tls_version then ALTER INSTANCE RELOAD TLS), then restart MySQL.

Properties

Operating systems: Any
Tags: mysqldatabasetls
Reference: CIS Oracle MySQL Community Server 8.4 Benchmark v1.1.0 - 2.15 Limit Accepted Transport Layer Security (TLS) Versions

Check this host

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

shell

tmaegis scan --target mysql --level 2