Clickjacking is a type of attack where an attacker tricks a user into clicking on something on a web page without their knowledge or consent. This is typically done by overlaying the website content with an invisible or transparent layer and positioning malicious elements such as buttons or links on top of legitimate ones. When the user interacts with the web page, they unknowingly interact with the hidden elements, which can lead to unintended actions or information disclosure.
To protect against clickjacking attacks in ASP.NET applications, you can add certain directives to the web.config file. Here’s an example of how you can prevent clickjacking using the X-Frame-Options header:
<system.webServer>
<httpProtocol>
<customHeaders>
<add name="X-Frame-Options" value="DENY" />
</customHeaders>
</httpProtocol>
</system.webServer>In the above configuration, the X-Frame-Options header is set to DENY, which prevents the web page from being displayed within an HTML frame or iframe on other websites. This helps protect against clickjacking attacks by ensuring that your website’s content cannot be embedded in a malicious context.
Alternatively, you can use the SAMEORIGIN value for the X-Frame-Options header instead of DENY. This allows your web page to be embedded in frames or iframes on other pages, but only if they originate from the same domain. Here’s an example:
<add name="X-Frame-Options" value="SAMEORIGIN" />By setting the appropriate X-Frame-Options value in the web.config file, you can mitigate the risk of clickjacking attacks on your application.
