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192.168.1.100 www.microsoft.com
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Decode Denso QR Bar Code In VS .NET
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Exercise 4: Reflecting on Updating an Application to Use Least Privilege
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Barcode Recognizer In VS .NET
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Answer the following questions. If you are unable to answer a question, review the les son materials and try the question again. You can find answers to the questions in the Questions and Answers section at the end of this chapter. 1. In Exercises 1 through 3, you explored an application that did not work correctly when the user was logged on as an administrator. Besides modifying the applica tion, how else could you have resolved the problem What drawbacks would that approach have 2. Least privilege provides which of the following benefits (Choose the best answer.) a. Enables standard users to debug your application line by line b. Grants standard users access to the Security event log c. Allows your application to run with minimal privileges d. Provides standard users access to the .NET Framework
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Make Quick Response Code In .NET Framework
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Lesson Summary
Generate Quick Response Code In Visual Basic .NET
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Develop applications using a standard user account to identify resources and priv ileges your application requires that standard users lack access to. If your application requires more privileges than provided by the standard user account, you can either provide system administrators deploying your application with instructions to modify ACLs and grant additional privileges, or give admin istrators the option of automatically performing those changes during the setup process. Use auditing and the Event Viewer to identify required privileges that a user lacks.
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Generate DataMatrix In VS .NET
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1-50
Barcode Encoder In Visual Studio .NET
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Leitcode Creator In .NET Framework
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1
Drawing Universal Product Code Version A In None
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Code 128 Code Set C Recognizer In Visual C#
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Implementing Security at Design Time
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Lab: Implementing Best Practices for Designing Secure Applications
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Read the following scenario and then complete the exercise that follows. If you are unable to answer a question, review the lessons and try the question again. You can find answers to the questions in the Questions and Answers section at the end of this chapter.
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Scenario
You have spent the last five years employed as an internal application developer in the information technology department of an enterprise health care company. Employees throughout your organization use the application you developed to manage subscriber benefit information. Although it was not originally designed with security in mind, your application is a portal for extremely sensitive information, including medical details about your subscribers. You ve had quiet times and busy weeks in the last five years, but management has never made security a priority until last week, when a temporary employee in the West coast office discovered that he could use your application to view any subscriber s personal information. Fortunately for you, he bragged about his hacking skills to another temp, who reported his acts to management. Your company s human resources team questioned him at length, and he revealed that he used a SQL injection attack that he read about on the Internet to allow normally restricted database queries to return records for all subscribers. Instead of typing in a social security number into a box, the temp typed a value such as OR TRUE --. Your application then provided a list of every single subscriber record. Your Chief Information Officer asks you to provide guidance regarding preventing security vulnerabilities in the applications you develop. You decide to examine your code, perform some interviews, and review legal and technical requirements before you meet with him again.
Results of the Code Examination
After examining your code, you realized that the vulnerability existed because you placed user input directly into a SQL query. The temp simply had to type his own WHERE clause into the social security number box to gain unrestricted access to sub scriber records.
Lab: Implementing Best Practices for Designing Secure Applications
1-51
Interviews
Following is a list of company personnel interviewed and their statements:
Public relations Wow. If news of this gets out, we d have subscribers drop ping left and right. Our stock would drop like a rock. It would take years to win back the trust of our subscribers. Legal Government regulations require us to carefully control access to sub scriber information. This is a direct violation of those regulations. We are liable for hundreds of thousands of dollars. IT Manager You told us you were a good programmer when we hired you. Why would you do this I really need you to try harder, or be smarter, or some thing. We can never again have a security vulnerability. Chief Information Officer This is unacceptable, but it s not entirely your fault. Your manager should have put you through security training and implemented code review processes. We ll keep you around, but this better not happen again.
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