Improving Web Application Security: Threats and - CGISecurity

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706 Improving Web Application Security: Threats and CountermeasuresAuthenticationCheck DescriptionWeb services that support restricted operations or provide sensitive data supportauthentication.If plain text credentials are passed in SOAP headers, SOAP messages are only passed overencrypted communication channels, for example, using SSL.Basic authentication is only used over an encrypted communication channel.Authentication mechanisms that use SOAP headers are based on Web Services Security (WSSecurity) using the Web Services Enhancements WSE).AuthorizationCheck DescriptionWeb services that support restricted operations or provide sensitive data supportauthorization.Where appropriate, access to Web service is restricted using URL authorization or fileauthorization if Windows authentication is used.Where appropriate, access to publicly accessible Web methods is restricted usingdeclarative principle permission demands.Sensitive DataCheck DescriptionSensitive data in Web service SOAP messages is encrypted using XML encryptionOR messages are only passed over encrypted communication channels (for example,using SSL.)Parameter ManipulationCheck DescriptionIf parameter manipulation is a concern (particularly where messages are routed throughmultiple intermediary nodes across multiple network links). Messages are digitally signed toensure that they cannot be tampered with.
Checklist: Securing Web Services 707Exception ManagementCheck DescriptionStructured exception handling is used when implementing Web services.Exception details are logged (except for private data, such as passwords).SoapExceptions are thrown and returned to the client using the standard SOAPelement.If application-level exception handling is required a custom SOAP extension is used.Auditing and LoggingCheck DescriptionThe Web service logs transactions and key operations.Proxy ConsiderationsCheck DescriptionThe endpoint address in Web Services Description Language (WSDL) is checked for validity.The URL Behavior property of the Web reference is set to dynamic for added flexibility.Administration ConsiderationsCheck DescriptionUnnecessary Web service protocols, including HTTP GET and HTTP POST, are disabled.The documentation protocol is disabled if you do not want to support the dynamic generationof WSDL.The Web service runs using a least-privileged process account (configured through the element in Machine.config.)Custom accounts are encrypted by using Aspnet_setref.exe.Tracing is disabled with:Debug compilations are disabled with:
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Improving WebApplication SecurityTh
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Contents xxvii.NET Remoting Securit
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Contents xxixStaying Secure (contin
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Contents xxxiASP.NET Architecture o
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Contents xxxiiiSummary ............
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Contents xxxvIndex of Checklists 68
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Contents xxxviiChecklistSecuring Da
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Contents xxxixHow ToIndex 743How To
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Contents xliRestricting Server-to-S
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ForewordsForeword by Mark CurpheyWh
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Forewords xlvForeword by Joel Scamb
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Forewords xlviiFinally, techniques
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Fast Track — How To Implementthe
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Part IIntroduction to Threats andCo
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4 Part I: Introduction to Threats a
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3Threat ModelingIn This Chapter●
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Chapter 3: Threat Modeling 47Threat
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Chapter 3: Threat Modeling 49Archit
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Chapter 3: Threat Modeling 51Figure
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Chapter 3: Threat Modeling 53Identi
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Chapter 3: Threat Modeling 55Docume
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Chapter 3: Threat Modeling 57●●
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Chapter 3: Threat Modeling 61Note I
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Chapter 3: Threat Modeling 63Risk =
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Part IIDesigning SecureWeb Applicat
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70 Part II: Designing Secure Web Ap
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Part IIIBuilding Secure WebApplicat
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8Code Access Security in PracticeIn
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11Building Secure ServicedComponent
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Part IVSecuring Your Network,Host,
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18Securing Your Database ServerIn T
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Chapter 18: Securing Your Database
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21Code ReviewIn This Chapter●●
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Chapter 21: Code Review 607For exam
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22Deployment ReviewIn This Chapter
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How To:Use IPSec for Filtering Port
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How To:Use the Microsoft BaselineSe
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How To:Use URLScanApplies ToSummary
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How To:Create a CustomEncryption Pe
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patterns & practicesProven practice
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