Improving Web Application Security: Threats and - CGISecurity

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698 Improving Web Application Security: Threats and CountermeasuresSensitive DataCheck DescriptionSSL is used to protect sensitive data on the wire.Sensitive data is not passed across pages; it is maintained using server-side statemanagement.Sensitive data is not stored in cookies, hidden form fields, or query strings.Do not cache sensitive data. Output caching is off by default.Plain text passwords are avoided in Web.config and Machine.config files. (Aspnet_setreg.exeis used to encrypt credentials.)Session ManagementCheck DescriptionThe session cookie is protected using SSL on all pages that require authenticated access.The session state service is disabled if not used.The session state service (if used) runs using a least-privileged account.Windows authentication is used to connect to Microsoft®SQL Server state database.Access to state data in the SQL Server is restricted.Connection strings are encrypted by using Aspnet_setreg.exe.The communication channel to state store is encrypted (IPSec or SSL).Parameter ManipulationCheck DescriptionView state is protected using message authentication codes (MACs).Query strings with server secrets are hashed.All input parameters are validated.Page.ViewStateUserKey is used to counter one-click attacks.
Checklist: Securing ASP.NET 699Exception ManagementCheck DescriptionStructured exception handling is used.Exception details are logged on the server.Generic error pages with harmless messages are returned to the client.Page-level or application-level error handlers are implemented.The application distinguishes between errors and exception conditions.Auditing and LoggingCheck DescriptionThe ASP.NET process is configured to allow new event sources to be created at runtime, orapplication event sources to be created at installation time.Configuration File SettingsCheck DescriptionTracing is not enabled on the production servers.Request and response encoding is appropriately configured.maxRequestLength is configured to prevent users from uploading very large files (optional).Debug compiles are not enabled on the production servers by setting debug=“false”If the application does not use view state, enableViewState is set to “false”.If the application uses view state, enableViewState is set to “true” andenableViewStateMac is set to “true” to detect view state tampering.(continued)
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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 57●●
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Chapter 3: Threat Modeling 61Note I
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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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21Code ReviewIn This Chapter●●
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22Deployment ReviewIn This Chapter
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How To:Harden the TCP/IP StackAppli
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How To:Use IPSec for Filtering Port
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How To:Use URLScanApplies ToSummary
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patterns & practicesProven practice
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