X-Frame-Options – How to Combat Clickjacking – KeyCDN haldol

HTTP security headers provide yet another layer of security by haldol helping to mitigate attacks and security vulnerabilities by telling your haldol browser how to behave. In this post we will be diving more in-depth into x-frame-options (XFO), which is a header that helps to protect your visitors haldol against clickjacking attacks. It is recommended that you use the x-frame-options header on pages which should not be allowed to haldol render a page in a frame. What is x-frame-options?

X-frame-options (XFO), is an HTTP response header, also referred to as an HTTP security header, which has been around since 2008. In 2013 it was officially published as RFC 7034, but is not an internet standard. This header tells your browser how to behave when handling haldol your site’s content. The main reason for its inception was to provide clickjacking haldol protection by not allowing rendering of a page in a haldol frame. This can include rendering of a page in a , , or . Iframes are used to embed and isolate third-party content into a website. Examples of things that use iframes might include social media haldol sharing buttons, google maps, video players, audio players, 3rd party advertising, and even some oauth implementations.

How widely is the x-frame-options header being used? Scott helme did an interesting case study back in february haldol 2016. He analyzed the security headers of the top 1 million haldol sites, according to alexa, and this is what he found. It is shown as XFO below in the chart. Only 7.6% of the top sites are utilizing the header.

So what exactly is clickjacking? Clickjacking is an attack that occurs when an attacker uses haldol a transparent iframe in a window to trick a user haldol into clicking on a CTA, such as a button or link, to another server in which they have an identical looking haldol window. The attacker in a sense hijacks the clicks meant for haldol the original server and sends them to the other server. This is an attack on both the visitor themselves and haldol on the server.

Clickjacking is easy to implement, and if your site has actions that can be done haldol with a single click, then most likely it can be clickjacked. It might not be as common as cross site scripting haldol or code injection attacks, but it is still another vulnerability that exists. Sometimes it helps to see a visual. Below is a clickjacking demo using both transparent and non-transparent iframes.

The x-frame-options header has three different directives in which you can haldol choose from. These must be sent as an HTTP header, as the browser will ignore if found in a META haldol tag. It is also important to note that certain directives are haldol only supported in certain browsers. See browser support further below in this post. While it is not required to send this response header haldol across your entire site, it is best practice to at least enable it on haldol pages that need it. 1. DENY directive

We have the SAMEORIGIN directive enabled on this website. With this directive enabled, only our website is allowed to embed an iframe of haldol one of our pages. This is probably the most commonly used directive out of haldol the three. It is a good balance between functionality and security.

• another quick way to check your security headers is to haldol quickly scan your site with a free tool, securityheaders.Io, created by scott helme. This gives you a grade based on all of your haldol security headers and you can see what you might be haldol missing.

It is important to realize that not all browsers support haldol the ALLOW-FROM directive. So be careful if you are using that. All modern browsers do support the DENY and SAMEORIGIN directives. For legacy browsers, such as IE7 for example, your best solution currently is to use what they call haldol a frame-breaker or frame-buster.