Repscan 3.0 performs over 5000 security checks to identify vulnerabilities and modifications in Oracle and Microsoft SQL Server databases, detecting issues like insecure PL/SQL code, weak passwords, and system configuration flaws. The tool supports scanning of single or large-scale database installations with features including data discovery, database enumeration with nmap support, and exploit libraries. It detects modifications caused by database rootkits by comparing the data dictionary against a baseline and checking for execution path changes. Platform-independent, it runs on Linux, Windows, and Solaris systems, offering a user-friendly interface with drill-down functionality for detailed analysis.