Improving Web Application Security: Threats and - CGISecurity

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642 Part V: Assessing Your SecurityDo You Close Database Connections?Check that your code is not vulnerable to leaving open database connections if, forexample, exceptions occur. Check that the code closes connections inside a finallyblock or that the connection object is constructed inside a C# using statement asshown below. This automatically ensures that it is closed.using ((SqlConnection conn = new SqlConnection(connString))){conn.Open();// Connection will be closed if an exception is generated or if control flow// leaves the scope of the using statement normally.}SummarySecurity code reviews are similar to regular code reviews or inspections except thatthe focus is on the identification of coding flaws that can lead to securityvulnerabilities. The added benefit is that the elimination of security flaws oftenmakes your code more robust.This chapter has shown you how to review managed code for top security issuesincluding XSS, SQL injection, and buffer overflows. It has also shown you how toidentify other more subtle flaws that can lead to security vulnerabilities andsuccessful attacks.Security code reviews are not a panacea. However, they can be very effective andshould feature as a regular milestone in the development life cycle.Additional ResourceFor more information, see MSDN article, “Securing Coding Guidelines for the .NETFramework,” at http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnnetsec/html/seccodeguide.asp.
22Deployment ReviewIn This Chapter●●●●●●●OverviewReviewing network and host configurationReviewing base Windows 2000 configurationReviewing IIS and .NET Framework configurationReviewing Web application and Web service configurationReviewing Enterprise Services configurationReviewing Remoting configurationReviewing SQL Server configurationWeb application security is dependent upon the security of the underlyinginfrastructure on which the application is deployed. Weak network or hostconfiguration settings result in vulnerabilities that can and will be exploited. Thedeployment review covered in this chapter inspects the configuration of the networkand host. The host includes Windows 2000 Server and, depending on the server role,it can also include IIS, the Microsoft .NET Framework, Enterprise Services, and SQLServer.The main configuration elements that are subject to the deployment review processare shown in Figure 22.1.
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Contents xxvii.NET Remoting Securit
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Contents xxixStaying Secure (contin
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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 xliRestricting Server-to-S
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ForewordsForeword by Mark CurpheyWh
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Part IIntroduction to Threats andCo
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3Threat ModelingIn This Chapter●
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Chapter 3: Threat Modeling 47Threat
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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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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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How To:Harden the TCP/IP StackAppli
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How To:Use IPSec for Filtering Port
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patterns & practicesProven practice
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