The remote Debian host is missing a security-related update.
Several issues have been discovered in the MariaDB database server. The vulnerabilities are addressed by upgrading MariaDB to the new upstream version 10.1.26. Please see the MariaDB 10.1 Release Notes for further details : - https://mariadb.com/kb/en/mariadb/mariadb-10124-release- notes/ - https://mariadb.com/kb/en/mariadb/mariadb-10125-release- notes/ - https://mariadb.com/kb/en/mariadb/mariadb-10126-release- notes/
Upgrade the mariadb-10.1 packages. For the stable distribution (stretch), these problems have been fixed in version 10.1.26-0+deb9u1.