Buffer overflow in libmysqlclient.so in MySQL 3.23.33 and earlier allows remote attackers to execute arbitrary code via a long host parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/6418
https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-1433
http://www.securityfocus.com/archive/1/161917