// Construct a parameterized SQL query to retrieve the first row from in .NET framework

Drawer QR-Code in .NET framework // Construct a parameterized SQL query to retrieve the first row from

// Construct a parameterized SQL query to retrieve the first row from
Print Quick Response Code In VS .NET
Using Barcode creator for VS .NET Control to generate, create QR-Code image in Visual Studio .NET applications.
www.OnBarcode.com
QR Recognizer In Visual Studio .NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
// the Products table with the supplied ProductName
Paint Barcode In VS .NET
Using Barcode creation for .NET Control to generate, create bar code image in VS .NET applications.
www.OnBarcode.com
Barcode Reader In Visual Studio .NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
// Note that no value is specified in the constructed query.
QR Code Generator In Visual C#.NET
Using Barcode creator for Visual Studio .NET Control to generate, create Denso QR Bar Code image in Visual Studio .NET applications.
www.OnBarcode.com
QR Code ISO/IEC18004 Drawer In VS .NET
Using Barcode creation for ASP.NET Control to generate, create QR image in ASP.NET applications.
www.OnBarcode.com
// Instead, @ProductName, a parameter, is specified.
Encoding QR Code In Visual Basic .NET
Using Barcode encoder for VS .NET Control to generate, create QR Code image in .NET framework applications.
www.OnBarcode.com
Creating EAN / UCC - 13 In Visual Studio .NET
Using Barcode generation for Visual Studio .NET Control to generate, create UPC - 13 image in .NET applications.
www.OnBarcode.com
SqlDataAdapter productAdapter = new SqlDataAdapter( SELECT ProductID,
PDF417 Drawer In Visual Studio .NET
Using Barcode printer for .NET Control to generate, create PDF417 image in VS .NET applications.
www.OnBarcode.com
Barcode Generation In .NET Framework
Using Barcode generation for Visual Studio .NET Control to generate, create bar code image in .NET framework applications.
www.OnBarcode.com
ProductName FROM Products WHERE ProductName=@ProductName",
Generating QR In .NET
Using Barcode encoder for .NET framework Control to generate, create Denso QR Bar Code image in .NET applications.
www.OnBarcode.com
RM4SCC Generation In .NET Framework
Using Barcode creator for Visual Studio .NET Control to generate, create RoyalMail4SCC image in .NET framework applications.
www.OnBarcode.com
ConfigurationSettings.AppSettings["appDSN"]);
GS1 - 12 Decoder In VS .NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Paint EAN-13 Supplement 5 In None
Using Barcode drawer for Microsoft Word Control to generate, create European Article Number 13 image in Word applications.
www.OnBarcode.com
DataSet productDataSet = new DataSet();
Recognize Data Matrix 2d Barcode In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Create UPCA In .NET Framework
Using Barcode creation for Reporting Service Control to generate, create GTIN - 12 image in Reporting Service applications.
www.OnBarcode.com
Questions and Answers
Generating Bar Code In None
Using Barcode generation for Software Control to generate, create bar code image in Software applications.
www.OnBarcode.com
Encode Code 128 In Java
Using Barcode drawer for BIRT reports Control to generate, create Code128 image in Eclipse BIRT applications.
www.OnBarcode.com
// Add a parameter to the SqlDataAdapter, and specify its value SqlParameter parm = productAdapter.SelectCommand.Parameters.Add( "@ProductName", SqlDbType.NVarChar, 40); parm.Value = productName; // Run the query, fill the dataset, and return the first row
PDF 417 Scanner In Visual C#.NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Code39 Printer In Objective-C
Using Barcode maker for iPhone Control to generate, create Code-39 image in iPhone applications.
www.OnBarcode.com
productAdapter.Fill(productDataSet, DataSet );
DataTable productsTable = productDataSet.Tables[0];
return productsTable.Rows[0];
2-57
Private Shared Function GetRowFromName(ByVal productName As String) As DataRow If productName.Length > 40 Then Throw New Exception( Input too long. ) End If Construct a parameterized SQL query to retrieve the first row from the Products table with the supplied ProductName Note that no value is specified in the constructed query. Instead, @ProductName, a parameter, is specified. Dim productAdapter As SqlDataAdapter = New SqlDataAdapter( "SELECT ProductID, ProductName FROM Products WHERE ProductName=@ProductName",ConfigurationSettings.AppSettings( appDSN )) Dim productDataSet As DataSet = New DataSet() Add a parameter to the SqlDataAdapter, and specify its value Dim parm As SqlParameter = productAdapter.SelectCommand.Parameters.Add( "@ProductName",SqlDbType.NVarChar,40) parm.Value = productName Run the query, fill the dataset, and return the first row productAdapter.Fill(productDataSet, DataSet ) Dim productsTable As DataTable = productDataSet.Tables(0) Return productsTable.Rows(0) End Function
3. Besides changing the code in the application, what techniques could be used to reduce the likelihood of a SQL injection exploit
Most significantly, the database permissions should be restricted. The ASP.NET application should not be running with privileges to drop a table. Instead, the application should run in an extremely limited security context that has access only to issue SELECT queries that retrieve the ProductID and ProductName rows from the Products table.
Practice: Preventing Cross-Site Scripting
Page 2-45
Exercise
1. How would you recommend creating a form that meets everyone s requirements
Recreating the form using ASP.NET is a natural choice. ASP.NET s default configuration will pre vent the exploit you ve been experiencing, because it blocks request parameters that are HTML-encoded. You can, and should, further validate the input in the request parameters by constraining it for size and format, rejecting it if potentially malicious characters appear, and sanitizing it by removing or replacing characters with special meaning to your application and the underlying database.
2-58
2
Using Secure Coding Best Practices
Lab: Using Secure Coding Best Practices
Page 2-52
Exercise
Answer the following questions for your boss: 1. What types of exploits is the application potentially vulnerable to
Primarily SQL injection attacks. There s no mention of retrieving files, so there s no reason to think canonicalization might be a problem. CSS attacks target only Web applications.
2. How can an attacker exploit a Windows Forms application
An attacker can perform a SQL injection attack by typing a delimiter and SQL commands directly into a text box. If the application inserts that input directly into a dynamically generated SQL query, the attack will be successful. Depending on the permissions assigned to the user account used to connect to the database, the attacker might be able to add a highly privileged user account, view detailed information about the database structure, gain direct access to the contents of the database, and modify values in the database.
3. During your code review, what problems would you look for
You should look for user input that is not properly validated. In particular, user input that is inserted directly into a database query would enable an attacker to successfully exploit a SQL injection attack. Every piece of information provided by a user should be constrained to the data s type, format, and length. Then, the input should be parsed for malicious content. Finally, the input should be sanitized to remove or replace potentially malicious characters.
4. What recommendation can you make to address the systems administrator s concern
The application should add events to the event log preferably on the server itself. The sys tems administrator can then use standardized tools to parse the events and identify patterns that could signal an attack has taken place or is currently under way.
3 Testing Applications for Vulnerabilities
Why This Matters
A chapter on testing in a book for developers might seem out of place, because developers usually have a dedicated testing and quality assurance (QA) team. However, unit testing is becoming a common technique for improving the quality of code submitted to QA by reducing the number of bugs ahead of time. Unit testing is an automated testing technique that developers can use to catch problems before passing code to QA effectively reducing the number of testing cycles. Lesson 1 in this chapter focuses on using unit testing for resistance to security vulnerabilities. The security level of complete assemblies can be tested with minimal effort, too, thanks to a handful of specialized tools. Lesson 2 in this chapter describes these tools and provides best practices for testing your assemblies for security vulnerabilities. Exam Objectives in this :
Copyright © OnBarcode.com . All rights reserved.