If you are still running MySQL 5.0.12, the primary recommendation is to to a supported version (e.g., MySQL 8.0 ). For legacy systems that cannot be updated: MySQL (Linux) - Database Privilege Escalation - Exploit-DB

The server churned. No error. The DLL was in place.

If you are still running MySQL 5.0.12, the system is considered highly insecure due to the age of these vulnerabilities.