This site is the archived OWASP Foundation Wiki and is no longer accepting Account Requests.
To view the new OWASP Foundation website, please visit https://owasp.org
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.
Parametrized Query Examples
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 - Library | 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 |
Query safeHQLQuery = session.createQuery("from Inventory where productID=:productid");
safeHQLQuery.setParameter("productid", userSuppliedParameter);
|
| .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
}
|
| ASP.NET |
string sql = "SELECT * FROM Customers WHERE CustomerId = @CustomerId";
SqlCommand command = new SqlCommand(sql);
command.Parameters.Add(new SqlParameter("@CustomerId", System.Data.SqlDbType.Int));
command.Parameters["@CustomerId"].Value = 1;
|
| Ruby - ActiveRecord |
# Create
Project.create!(:name => 'owasp')
# Read
Project.all(:conditions => "name = ?", name)
Project.all(:conditions => { :name => name })
Project.where("name = :name", :name => name)
# Update
project.update_attributes(:name => 'owasp')
# Delete
Project.delete(:name => 'name')
|
| Ruby |
insert_new_user = db.prepare "INSERT INTO users (name, age, gender) VALUES (?, ? ,?)" insert_new_user.execute 'aizatto', '20', 'male' |
| PHP - PDO |
$stmt = $dbh->prepare("INSERT INTO REGISTRY (name, value) VALUES (:name, :value)");
$stmt->bindParam(':name', $name);
$stmt->bindParam(':value', $value);
|
| Cold Fusion |
<cfquery name = "getFirst" dataSource = "cfsnippets">
SELECT * FROM #strDatabasePrefix#_courses WHERE intCourseID =
<cfqueryparam value = #intCourseID# CFSQLType = "CF_SQL_INTEGER">
</cfquery>
|
| Perl - DBI |
my $sql = "INSERT INTO foo (bar, baz) VALUES ( ?, ? )"; my $sth = $dbh->prepare( $sql ); $sth->execute( $bar, $baz ); |
Related Articles
OWASP Cheat Sheets Project Homepage
Authors and Primary Editors
Jim Manico - jim [at] owasp.org
