.NET - ASP.NET WebAPI services and Windows Integrated Authentication

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Net Framework should be upgraded to use version 4. When to use this code This code is particularly useful for those who wish to add SMS functionality to a website. Your approach to securing your web application should be to start at the top threat A1 below and work down, this will ensure that any time spent on security will be spent most effectively spent and cover the top threats first and lesser threats afterwards.

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NET framework, and is still the most common enterprise platform for web application development. If you don't use Viewstate, then look to the default master page of the ASP. The OWASP Top 10 lists the most prevalent and dangerous threats to web security in the world today and is reviewed every 3 years. This section is based on this. Your approach to securing your web application should be to start at the top threat A1 below and work down, this will ensure that any time spent on security will be spent most effectively spent and cover the top threats first and lesser threats afterwards.

After covering the top 10 it is generally advisable to assess for other threats or get a professionally completed Penetration Test. Concatenate strings anywhere in your code and execute them against your database Known as dynamic sql. You can still accidentally do this with ORMs or Stored procedures so check everywhere.

Practise Least Privilege - Connect to the database using an account with a minimum set of permissions required to do it's job i. Reduce the time period a session can be stolen in by reducing session timeout and removing sliding expiration:.

See here for full startup code snippet. Ensure cookie is sent over https in the production environment. This should be enforced in the config transforms:. Find here the code to prevent throttling. Tell someone if the account exists on LogOn, Registration or Password reset. Say something like 'Either the username or password was incorrect', or 'If this account exists then a reset token will be sent to the registered email address'. This protects against account enumeration.

The feedback to the user should be identical whether or not the account exists, both in terms of content and behaviour: Raw unless you really know that the content you are writing to the browser is safe and has been escaped properly. Enable a content security policy, this will prevent your pages from accessing assets it should not be able to access e.

When you have a resource object which can be accessed by a reference in the sample below this is the id then you need to ensure that the user is intended to be there.

Use a strong hash to store password credentials. Enforce passwords with a minimum complexity that will survive a dictionary attack i. Use a strong encryption routine such as AES where personally identifiable data needs to be restored to it's original format.

Do not encrypt passwords. Protect encryption keys more than any other asset. Apply the following test: Would you be happy leaving the data on a spreadsheet on a bus for everyone to read.

Assume the attacker can get direct access to your database and protect it accordingly. Get a free certificate from StartSSL. Then check the configuration using SSL Test. Ensure headers are not disclosing information about your application. Authorize users on all externally facing endpoints.

Net framework has many ways to authorize a user, use them at method level:. You can also check roles in code using identity features in. Forms must have the requisite helper as seen here:. Run the OWASP Dependency checker against your application as part of your build process and act on any high level vulnerabilities. For more information on all of the above and code samples incorporated into a sample MVC5 application with an enhanced security baseline go to Security Essentials Baseline project.

Bill Sempf - bill. Retrieved from " https: Navigation menu Personal tools Log in Request account. Views Read View source View history. This page was last modified on 3 August , at NET Framework Guidance 2. NET security tips for developers. Updating the Framework The. Whitelist allowable values coming from the user. Use enums, TryParse or lookup values to assure that the data coming from the user is as expected. Enums are still vulnerable to unexpected values because.

NET only validates a successful cast to the underlying data type, integer by default. IsDefined can validate whether the input value is valid within the list of defined constants. Apply the principle of least privilege when setting up the Database User in your database of choice.

The database user should only be able to access items that make sense for the use case. Use a strong hash algorithm. NET both Framework and Core the strongest hashing algorithm for general hashing requirements is System. Pbkdf2 which has several significant advantages over RfcDeriveBytes. When using a hashing function to hash non-unique inputs such as passwords, use a salt value added to the original value before hashing.

Make sure your application or protocol can easily support a future change of cryptographic algorithms. Use Nuget to keep all of your packages up to date.

Watch the updates on your development setup, and plan updates to your applications accordingly. General Lock down the config file. On-the-fly code quality analysis is available in C , VB. ReSharper will let you know if your code can be improved and suggest automatic quick-fixes. Multiple code editing helpers are available, such as extended IntelliSense, hundreds of instant code transformations, auto-importing namespaces, rearranging code and displaying documentation.

You don't have to write properties, overloads, implementations, and comparers by hand: Instant fixes help eliminate errors and code smells. Not only does ReSharper warn you when there are problems in your code but it provides quick-fixes to solve them automatically. Apply solution-wide refactorings or smaller code transformations to safely change your code base. Whether you need to revitalize legacy code or put your project structure in order, you can lean on ReSharper.

Use code formatting and cleanup to get rid of unused code and ensure compliance to coding standards. Navigation features help you instantly traverse your entire solution. You can jump to any file, type, or member in your code base in no time, or navigate from a specific symbol to its usages, base and derived symbols, or implementations. All keyboard shortcuts provided in the "Features" section are taken from 'Visual Studio' keyboard scheme.

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