Details
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Bug
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Status: Closed (View Workflow)
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Critical
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Resolution: Fixed
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3.4
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None
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Ubuntu 22.04 / Rocky Linux 9
Description
MariaDB client fails with error when it tries to connect to the MariaDB server as a root user through the socket:
# mariadb --socket=/var/run/mysqld/mysqld.sock
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ERROR 2026 (HY000): TLS/SSL error: Validation of SSL server certificate failed
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#
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The only 2 ways to overcome this so far, is either include "DNS:localhost" to the certificate Subject or Subject Alternative Name list, or supply --skip-ssl-verify-server-cert to the client:
# mariadb --skip-ssl-verify-server-cert --socket=/var/run/mysqld/mysqld.sock
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Welcome to the MariaDB monitor. Commands end with ; or \g.
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Your MariaDB connection id is 52
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Server version: 11.4.2-MariaDB-ubu2204-log mariadb.org binary distribution
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Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
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Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
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MariaDB [(none)]> SHOW PROCESSLIST;
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+----+-------------+-----------+------+---------+------+--------------------+------------------+----------+
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| Id | User | Host | db | Command | Time | State | Info | Progress |
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+----+-------------+-----------+------+---------+------+--------------------+------------------+----------+
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| 1 | system user | | NULL | Sleep | 367 | wsrep aborter idle | NULL | 0.000 |
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| 2 | system user | | NULL | Sleep | 367 | | NULL | 0.000 |
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| 8 | system user | | NULL | Sleep | 366 | wsrep applier idle | NULL | 0.000 |
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| 52 | root | localhost | NULL | Query | 0 | starting | SHOW PROCESSLIST | 0.000 |
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+----+-------------+-----------+------+---------+------+--------------------+------------------+----------+
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4 rows in set (0.001 sec)
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MariaDB [(none)]>
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However, second part is slightly more tricky on Debian, since debian-start script still uses /etc/mysql/debian.cnf for a service startup.
So basically after installation mariadb service fails to startup due to the same issue caused by debian-start:
Jul 10 12:56:11 aio1-galera-container-6507f4ff systemd[1]: Started MariaDB 11.4.2 database server.
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Jul 10 12:56:11 aio1-galera-container-6507f4ff /etc/mysql/debian-start[3799]: Upgrading MySQL tables if necessary.
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Jul 10 12:56:11 aio1-galera-container-6507f4ff mariadbd[3775]: 2024-07-10 12:56:11 10 [Warning] Aborted connection 10 to db: 'unconnected' user: 'unauthenticated' host: 'localhost' (This connection closed normally without authentication)
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Jul 10 12:56:11 aio1-galera-container-6507f4ff /etc/mysql/debian-start[3802]: Reading datadir from the MariaDB server failed. Got the following error when executing the 'mysql' command line client
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Jul 10 12:56:11 aio1-galera-container-6507f4ff /etc/mysql/debian-start[3802]: ERROR 2026 (HY000): TLS/SSL error: Validation of SSL server certificate failed
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Jul 10 12:56:11 aio1-galera-container-6507f4ff /etc/mysql/debian-start[3802]: FATAL ERROR: Upgrade failed
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Jul 10 12:56:11 aio1-galera-container-6507f4ff /etc/mysql/debian-start[3808]: Checking for insecure root accounts.
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Jul 10 12:56:12 aio1-galera-container-6507f4ff debian-start[3811]: ERROR 2026 (HY000): TLS/SSL error: Validation of SSL server certificate failed
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Jul 10 12:56:12 aio1-galera-container-6507f4ff mariadbd[3775]: 2024-07-10 12:56:12 11 [Warning] Aborted connection 11 to db: 'unconnected' user: 'unauthenticated' host: 'localhost' (This connection closed normally without authentication)
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With that certificate is issued as following:
Certificate:
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Data:
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Version: 3 (0x2)
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Serial Number:
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38:3f:74:b2:e5:7d:40:55:17:c8:1c:75:89:c7:4e:5d:6d:4b:f3:56
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Signature Algorithm: sha256WithRSAEncryption
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Issuer: C = GB, ST = England, CN = Example Corp Openstack Infrastructure Intermediate CA
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Validity
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Not Before: Jul 10 12:48:25 2024 GMT
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Not After : Jul 8 12:48:25 2034 GMT
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Subject: CN = aio1-galera-container-6507f4ff
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Subject Public Key Info:
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Public Key Algorithm: rsaEncryption
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Public-Key: (4096 bit)
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Modulus:
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...
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Exponent: 65537 (0x10001)
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X509v3 extensions:
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X509v3 Subject Alternative Name:
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DNS:aio1-galera-container-6507f4ff, IP Address:172.29.236.101, IP Address:172.29.236.102
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X509v3 Subject Key Identifier:
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D4:36:68:9B:62:A5:DE:DC:0B:8A:43:DC:E5:3B:E5:5B:E7:06:D4:4F
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X509v3 Authority Key Identifier:
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2F:51:75:41:49:74:B2:81:B3:84:FB:FE:26:F4:09:DD:AB:09:D8:04
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Signature Algorithm: sha256WithRSAEncryption
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Signature Value:
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...
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In case I add "DNS:localhost" to the SAN - client stops failing to connect:
/# openssl x509 -in /etc/ssl/certs/galera.pem -noout -text
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Certificate:
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Data:
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Version: 3 (0x2)
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Serial Number:
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18:c7:e5:24:3b:ec:83:28:2d:19:8f:79:90:f7:a2:04:f1:d7:7f:1f
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Signature Algorithm: sha256WithRSAEncryption
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Issuer: C = GB, ST = England, CN = Example Corp Openstack Infrastructure Intermediate CA
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Validity
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Not Before: Jul 10 13:04:14 2024 GMT
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Not After : Jul 8 13:04:14 2034 GMT
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Subject: CN = aio1-galera-container-6507f4ff
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Subject Public Key Info:
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Public Key Algorithm: rsaEncryption
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Public-Key: (4096 bit)
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Modulus:
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...
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Exponent: 65537 (0x10001)
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X509v3 extensions:
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X509v3 Subject Alternative Name:
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DNS:aio1-galera-container-6507f4ff, IP Address:172.29.236.101, DNS:localhost, IP Address:172.29.236.102
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X509v3 Subject Key Identifier:
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AB:04:32:1C:20:3E:96:6F:55:EA:C0:F6:D2:48:E8:DE:C3:66:5E:5E
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X509v3 Authority Key Identifier:
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2F:51:75:41:49:74:B2:81:B3:84:FB:FE:26:F4:09:DD:AB:09:D8:04
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Signature Algorithm: sha256WithRSAEncryption
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Signature Value:
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...
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# root@aio1-galera-container-6507f4ff:/# mariadb --socket=/var/run/mysqld/mysqld.sock
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Welcome to the MariaDB monitor. Commands end with ; or \g.
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Your MariaDB connection id is 45
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Server version: 11.4.2-MariaDB-ubu2204-log mariadb.org binary distribution
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Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
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Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
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MariaDB [(none)]> SHOW VARIABLES LIKE 'have_ssl';
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+---------------+-------+
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| Variable_name | Value |
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+---------------+-------+
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| have_ssl | YES |
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+---------------+-------+
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1 row in set (0.001 sec)
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MariaDB [(none)]> SHOW SESSION STATUS LIKE 'Ssl_cipher';
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+---------------+------------------------+
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| Variable_name | Value |
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+---------------+------------------------+
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| Ssl_cipher | TLS_AES_256_GCM_SHA384 |
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+---------------+------------------------+
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1 row in set (0.001 sec)
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MariaDB [(none)]> SHOW PROCESSLIST;
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+----+-------------+-----------+------+---------+------+--------------------+------------------+----------+
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| Id | User | Host | db | Command | Time | State | Info | Progress |
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+----+-------------+-----------+------+---------+------+--------------------+------------------+----------+
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| 1 | system user | | NULL | Sleep | 167 | | NULL | 0.000 |
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| 2 | system user | | NULL | Sleep | 167 | wsrep aborter idle | NULL | 0.000 |
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| 7 | system user | | NULL | Sleep | 166 | wsrep applier idle | NULL | 0.000 |
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| 45 | root | localhost | NULL | Query | 0 | starting | SHOW PROCESSLIST | 0.000 |
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+----+-------------+-----------+------+---------+------+--------------------+------------------+----------+
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4 rows in set (0.000 sec)
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MariaDB [(none)]>
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Please, let me know if you're interested in some configuration options.
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