ROSLYN.SECURITY.CA5396 : Set HttpOnly to true for HttpCookie (C#)

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ROSLYN.SECURITY.CA5396 : Set HttpOnly to true for HttpCookie (C#)

Summary

As a defense in depth measure, ensure security sensitive HTTP cookies are marked as HttpOnly. This indicates web browsers should disallow scripts from accessing the cookies. Injected malicious scripts are a common way of stealing cookies.

This check corresponds to Roslyn rule CA5396. For full rule details, see the Microsoft website: CA5396.

Properties

Class Name	Set HttpOnly to true for HttpCookie (C#)
Significance	security
Mnemonic	ROSLYN.SECURITY.CA5396
Categories	None
Availability	Available for C# only.
Enabling	Checks for this warning class are disabled by default. To enable them, add the following WARNING_FILTER rule to the project configuration file. WARNING_FILTER += allow class="Set HttpOnly to true for HttpCookie (C#)"

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.