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Abridged SQL Injection Prevention Cheat Sheet
DRAFT CHEAT SHEET - WORK IN PROGRESS
Introduction
SQL Injection is one of the most damaging web vulnerabilities. It represents a serious threat because SQL Injection allows evil attacker code to change the structure of a web application's SQL statement in a way that can steal data, modify data, or facilitate command injection. This cheat sheet is a derivative work of the SQL Injection Prevention Cheat Sheet.
SQL Injection Prevention Overview
SQL Injection is best prevented through the use of parametrized queries. The following chart demonstrates, with real-world code samples, how to build parametrized queries in most of the common web languages.
Language | Parametrized Query |
---|---|
Java - Standard |
String custname = request.getParameter("customerName"); String query = "SELECT account_balance FROM user_data WHERE user_name = ? "; PreparedStatement pstmt = connection.prepareStatement( query ); pstmt.setString( 1, custname); ResultSet results = pstmt.executeQuery( ); |
Java - Hibernate | TODO |
.NET - C# |
String query = "SELECT account_balance FROM user_data WHERE user_name = ?"; try { OleDbCommand command = new OleDbCommand(query, connection); command.Parameters.Add(new OleDbParameter("customerName", CustomerName Name.Text)); OleDbDataReader reader = command.ExecuteReader(); // … } catch (OleDbException se) { // error handling } |
.NET - ASP.net | TODO |
Ruby |
Project.all(:conditions => "name = ?", name) Project.all(:conditions => { :name => name }) Project.all(:conditions => "name = '#{params[:name]}'") |
Related Articles
OWASP Cheat Sheets Project Homepage
Authors and Primary Editors
Jim Manico - jim [at] owasp.org