Improving Web Application Security: Threats and - CGISecurity

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718 Improving Web Application Security: Threats and CountermeasuresAuthorizationCheck DescriptionCalling users are restricted using declarative or imperative principal permission checks(normally performed by business logic).Calling code is restricted using identity permission demands in scenarios where you knowand want to limit the calling code.Application login is restricted in the database and can only execute selected storedprocedures. Application’s login has no direct table access.Configuration ManagementCheck DescriptionWindows authentication is used to avoid credential management.Connection strings are encrypted and encrypted data is stored securely, for example, in arestricted registry key.OLE DB connection strings do not contain Persist Security Info=“true” or “yes”.UDL files are secured with restricted ACLs.Sensitive DataCheck DescriptionSensitive data is encrypted in the database using strong symmetric encryption (forexample, 3DES).Symmetric encryption keys are backed up and encrypted with DPAPI and stored in arestricted registry key.Sensitive data is secured over the network by using SSL or IPSec.Passwords are not stored in custom user store databases. Password hashes are storedwith salt values instead.
Checklist: Securing Data Access 719Exception ManagementCheck DescriptionADO.NET exceptions are trapped and logged.Database connections and other limited resources are released in case of exception orcompletion of operation.ASP.NET is configured with a generic error page using the element.Deployment ConsiderationsCheck DescriptionFirewall restrictions ensure that only the SQL Server listening port is available on thedatabase server.A method for maintaining encrypted database connection strings is defined.The application is configured to use a least-privileged database login.SQL server auditing is configured. Failed login attempts are logged at minimum.Data privacy and integrity over the network is provided with IPSec or SSL.
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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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10 Part I: Introduction to Threats
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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 61Note I
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Part IIDesigning SecureWeb Applicat
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Part IIIBuilding Secure WebApplicat
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8Code Access Security in PracticeIn
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Chapter 8: Code Access Security in
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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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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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patterns & practicesProven practice
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Improving Web Application Security: Threats and - CGISecurity

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