asp.net barcode control s SQL INJECTION in Font

Make DataMatrix in Font s SQL INJECTION

CHAPTER 8 s SQL INJECTION
Print Data Matrix In None
Using Barcode generator for Font Control to generate, create Data Matrix image in Font applications.
www.OnBarcode.com
QR Code Generation In None
Using Barcode encoder for Font Control to generate, create QR Code image in Font applications.
www.OnBarcode.com
HOW A DATABASE GETS OWN3D
PDF-417 2d Barcode Drawer In None
Using Barcode generation for Font Control to generate, create PDF 417 image in Font applications.
www.OnBarcode.com
Generating European Article Number 13 In None
Using Barcode generator for Font Control to generate, create GS1 - 13 image in Font applications.
www.OnBarcode.com
In addition to some of the statements already described in this chapter, other troublesome statements an attacker might inject include the following: Statements that insert or modify data in the database: For example, injecting the statement INSERT INTO admin_users VALUES ('hacker', ...) which inserts a row into the application s admin_users table, would have the effect of creating an administrative account for the application, for which the attacker has chosen (and hence knows) the username and password. This would give the attacker access to the application s administrative functions, which might include the ability to review users personal information, initiate refunds of credit card payments, and so on. Various database-administrative commands: Depending on the command set supported by the particular database, this may allow the attacker to shut down the database, initiate network connections from the database host, and even instruct the operating system on which the database server is running to execute commands or programs of the attacker s choosing.4 The latter would likely result in a full compromise of the database server. Additional attack patterns are discussed in Advanced SQL Injection in SQL Server Applications, by Chris Anley, and Manipulating Microsoft SQL Server Using SQL Injection, by Cesar Cerrudo.
Paint Barcode In None
Using Barcode creator for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
UPCA Generation In None
Using Barcode printer for Font Control to generate, create GS1 - 12 image in Font applications.
www.OnBarcode.com
Before we can introduce techniques to prevent SQL injection attacks, we consider a variation of the vulnerability as it applies to queries with string-valued parameters. In the example introduced at the beginning of this section, the parameter vulnerable to injection was used in the query in a context in which a numeric quantity was expected: sql_query = ... + "AND order_month=" + request.getParameter("month"); In contrast, parameters that are used in an SQL statement in a context in which a string is expected need to be enclosed in quote characters to allow the SQL parser to correctly parse the data as a string literal. For example, suppose the application also provides a feature to users that allows them to review all orders of pizzas with a particular topping. The corresponding search form would have a field topping, and the resulting SQL query would be constructed as follows: sql_query = "SELECT pizza, toppings, quantity, order_day " + "FROM orders " + "WHERE userid=" + session.getCurrentUserId() + " " + "AND toppings LIKE '%" + request.getParameter("topping") + "%' ";
Code 128B Drawer In None
Using Barcode drawer for Font Control to generate, create Code 128C image in Font applications.
www.OnBarcode.com
MSI Plessey Generation In None
Using Barcode creator for Font Control to generate, create MSI Plessey image in Font applications.
www.OnBarcode.com
4. Depending on the configuration of the database server, this may, for example, be possible using the xp_cmdshell extended stored procedure supported by Microsoft s SQL Server.
Make ECC200 In Objective-C
Using Barcode drawer for iPad Control to generate, create Data Matrix image in iPad applications.
www.OnBarcode.com
Drawing ECC200 In Java
Using Barcode creation for Java Control to generate, create DataMatrix image in Java applications.
www.OnBarcode.com
CHAPTER 8 s SQL INJECTION
Generate Linear Barcode In Java
Using Barcode generation for Java Control to generate, create Linear Barcode image in Java applications.
www.OnBarcode.com
Draw 2D Barcode In Visual Basic .NET
Using Barcode encoder for .NET Control to generate, create 2D image in VS .NET applications.
www.OnBarcode.com
If a user makes a query for past orders of pizzas with onions, submitting the form would result in an HTTP request for the URL: https://www.deliver-me-pizza.com/show_orders_by_topping topping=Onions which in turn results in the following SQL query to be constructed and executed: SELECT pizza, toppings, quantity, order_day FROM orders WHERE userid=4123 AND toppings LIKE '%Onions%' The LIKE operator specifies a textual match, with the % character used as a wildcard character (i.e., the condition matches all rows in which the toppings column contains the string Onions as a substring). Since the parameter topping is used in a context inside a quoted string, the attacker needs to inject additional single-quote characters to ensure that the resulting SQL statement after injection is syntactically correct. However, doing so is not difficult. For example, he could simply set the parameter topping to the following: brzfg%'; DROP table creditcards; -The resulting SQL statement after injection then becomes SELECT pizza, toppings, quantity, order_day FROM orders WHERE userid=4123 AND toppings LIKE '%brzfg%'; DROP table creditcards; --%' Here, the attacker has arranged for the SELECT clause to return an empty set by querying for a string that does not occur in the database (this isn t actually important in this particular attack, but might be necessary in a SELECT UNION attack). Furthermore, he has injected the SQL comment delimiter -- to prevent the % and ' characters at the end of the query from resulting in a syntax error. The other attacks introduced in this section (such as using SELECT UNION to retrieve data from other tables) can be adapted accordingly.
Encoding UPC-A Supplement 5 In None
Using Barcode generator for Online Control to generate, create GS1 - 12 image in Online applications.
www.OnBarcode.com
2D Barcode Generator In Java
Using Barcode printer for Java Control to generate, create Matrix 2D Barcode image in Java applications.
www.OnBarcode.com
Encode Code 39 Full ASCII In VB.NET
Using Barcode drawer for .NET Control to generate, create Code 39 image in VS .NET applications.
www.OnBarcode.com
Printing Universal Product Code Version A In Java
Using Barcode generator for BIRT Control to generate, create GTIN - 12 image in BIRT reports applications.
www.OnBarcode.com
Decoding QR Code In VB.NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
PDF 417 Printer In Java
Using Barcode creation for Java Control to generate, create PDF-417 2d barcode image in Java applications.
www.OnBarcode.com
UPC-A Recognizer In VS .NET
Using Barcode reader for .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Reading Barcode In C#
Using Barcode scanner for .NET framework Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.