Description
SQL Injection in PostgreSQL occurs when an application fails to properly sanitize user inputs, allowing an attacker to inject malicious SQL code into a query. This can lead to unauthorized access, data leakage, or manipulation of the database. Commonly exploited through web forms, query parameters, or user inputs, this vulnerability arises from concatenating user input directly into SQL queries.
Recommendation
Prevent SQL injections by parameterizing all queries and inputs using PreparedStatement or CallableStatement. Validate client-side input on the server-side. Implement type checking for data received from clients. Use ADO Command Objects with strong type checking and parameterized queries for ASP applications. Consider utilizing Stored Procedures for database operations. Avoid creating dynamic SQL queries through string concatenation. Apply input validation by implementing an ‘allow list’ of permitted characters or a ‘deny list’ of disallowed characters.
