barcode font vb.net A security problem in ActionBazaar in Java

Printer Data Matrix 2d barcode in Java A security problem in ActionBazaar

6.4.3 A security problem in ActionBazaar
Data Matrix ECC200 Generation In Java
Using Barcode generator for Java Control to generate, create ECC200 image in Java applications.
www.OnBarcode.com
Decode Data Matrix ECC200 In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
At ActionBazaar, customer service representatives (CSRs) are allowed to cancel a user s bid under certain circumstances (for example, if the seller discloses something in answer to an e-mail question from the bidder that should have been
PDF 417 Drawer In Java
Using Barcode creation for Java Control to generate, create PDF-417 2d barcode image in Java applications.
www.OnBarcode.com
ANSI/AIM Code 39 Printer In Java
Using Barcode generator for Java Control to generate, create Code 39 image in Java applications.
www.OnBarcode.com
Transactions and security
GS1 - 12 Creator In Java
Using Barcode drawer for Java Control to generate, create GS1 - 12 image in Java applications.
www.OnBarcode.com
QR Code Maker In Java
Using Barcode generation for Java Control to generate, create QR Code image in Java applications.
www.OnBarcode.com
mentioned on the item description). However, the cancel bid operation doesn t check if the user is actually a CSR as long as the user can locate the functionality on the ActionBazaar site for example, by typing in the correct URL. Figure 6.4 illustrates the security problem in ActionBazaar. A clever hacker breaks into the ActionBazaar web server logs and figures out the URL used by CSRs to cancel bids. Using this knowledge, he devises an even cleverer shill bidding scheme to incite users to overpay for otherwise cheap items. The hacker posts items on sale and uses a friend s account to incite a bidding war with genuine bidders. If at any point genuine bidders give up bidding and a fake bid becomes the highest bid, the hacker avoids actually having to pay for the item and losing money in posting fees by canceling his highest fake bid through the stolen URL. No one is any wiser as the genuine bidders as well as the ActionBazaar system think the highest bid was canceled for legitimate reasons. The end result is that an honest bidder is fooled into overpaying for otherwise cheap items. After a while, ActionBazaar customer service finally catches onto the scheme thanks to a few observant users and makes sure the bid canceling action is authorized for CSRs only. Now if a hacker tries to access the functionality, the system simply denies access, even if the hacker has a registered ActionBazaar account
EAN-13 Supplement 5 Maker In Java
Using Barcode drawer for Java Control to generate, create EAN 13 image in Java applications.
www.OnBarcode.com
Encoding MSI Plessey In Java
Using Barcode generator for Java Control to generate, create MSI Plessey image in Java applications.
www.OnBarcode.com
Figure 6.4 A security breach in ActionBazaar allows a hacker to shill bids by posting an item, starting a bidding war from a fake account and then at the last minute canceling the highest fake bid. The end result is that an unsuspecting bidder winds up with an overpriced item.
Data Matrix 2d Barcode Creator In None
Using Barcode maker for Excel Control to generate, create Data Matrix ECC200 image in Excel applications.
www.OnBarcode.com
Painting ECC200 In None
Using Barcode drawer for Software Control to generate, create DataMatrix image in Software applications.
www.OnBarcode.com
Exploring EJB security
Printing QR Code JIS X 0510 In Visual Studio .NET
Using Barcode maker for Visual Studio .NET Control to generate, create QR-Code image in .NET applications.
www.OnBarcode.com
Encode DataBar In VS .NET
Using Barcode creator for .NET Control to generate, create GS1 DataBar-14 image in VS .NET applications.
www.OnBarcode.com
and accesses the functionality through the URL or otherwise. As we discuss how security is managed by EJB in the next section, you will begin to see what an actual solution looks like.
UPC A Reader In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Paint Barcode In Objective-C
Using Barcode creator for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
6.4.4 EJB 3 and Java EE security
Encoding 1D Barcode In VB.NET
Using Barcode creation for VS .NET Control to generate, create Linear 1D Barcode image in VS .NET applications.
www.OnBarcode.com
PDF-417 2d Barcode Scanner In Visual C#
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Java EE security is largely based on the Java Authentication and Authorization Service (JAAS) API. JAAS essentially separates the authentication system from the Java EE application by using a well-defined, pluggable API. In other words, the Java EE application need only know how to talk to the JAAS API. The JAAS API, in contrast, knows how to talk to underlying authentication systems like Lightweight Directory Access Protocol (LDAP), such as Microsoft Active Directory or Oracle Internet Directory (OID) using a vendor plug-in. As a result, you can easily swap between authentication systems simply by swapping JAAS plug-ins without changing any code. In addition to authentication, the application server internally uses JAAS to perform authorization for both the web and EJB tiers. When we look at programmatic EJB security management, we ll directly deal with JAAS very briefly when we discuss the JAAS javax.security.Principal interface. Feel free to explore JAAS at http://java.sun.com/products/jaas/ since our discussion is limited to what is needed for understanding EJB security. JAAS is designed so that both the authentication and authorization steps can be performed at any Java EE tier, including the web and EJB tiers. Realistically, however, most Java EE applications are web accessible and share an authentication system across tiers, if not across the application server. JAAS fully leverages this reality and once a user (or entity, to use a fancy security term) is authenticated at any Java EE tier, the authentication context is passed through tiers whenever possible, instead of repeating the authentication step. The Principal object we already mentioned represents this sharable, validated authentication context. Figure 6.5 depicts this common Java EE security management scenario. As shown in figure 6.5, a user enters the application through the web tier. The web tier gathers authentication information from the user and authenticates the supplied credentials using JAAS against an underlying security system. A successful authentication results in a valid user Principal. At this point, the Principal is associated with one or more roles. For each secured web/EJB tier resource, the application server checks if the principal/role is authorized to access the resource. The Principal is transparently passed from the web tier to the EJB tier as needed. A detailed discussion of web tier authentication and authorization is beyond the scope of this book, as is the extremely rare scenario of standalone EJB authentication using JAAS. However, we ll give you a basic outline of web tier security to
European Article Number 13 Creation In Visual Studio .NET
Using Barcode drawer for Reporting Service Control to generate, create EAN-13 image in Reporting Service applications.
www.OnBarcode.com
Draw UCC.EAN - 128 In .NET
Using Barcode maker for VS .NET Control to generate, create UCC-128 image in .NET framework applications.
www.OnBarcode.com
GTIN - 128 Reader In C#
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Data Matrix 2d Barcode Recognizer In Visual Basic .NET
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.