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This Familiar HTML Attribute Has Given Birth To A New Way Of Phishing

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Admin
Admin

Posts : 473
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Join date : 2014-12-10
Age : 24
Location : Pakistan

This Familiar HTML Attribute Has Given Birth To A New Way Of Phishing

Post by Admin on Sun Sep 04, 2016 6:30 am



The “target” attribute of anchor tag in HTML converts a website into a phishing platform if the website allows its users to post links.

We all use the anchor tag in HTML for providing a hyperlink in our hypertext document. But using this attribute with value ” _blank” in a particular way may make your website a great target for attackers.

The case becomes worse if your website is vulnerable to XSS.

Why?
Because when you open a new tab by reference from an existing tab, your browser allows this new tab to communicate with the referrer tab by using window.opener API.

How Does It Work:

imagine you have coded a webpage which has hyperlinks and you have used the target attribute with value _blank in this way:

href="http//:[You must be registered and logged in to see this link.] target="_blank"

And the link which is being referred here allows the users to put links on this page in some way. For example, Facebook allows you to put a link to your website on your website’s Facebook page.
Then a user may place a link to his/her website which has some malicious script on it like:

window.opener.location('http:fakewebsite.com/fakepage');

When the link is opened in new tab, this malicious code changes the link loaded in the referrer tab. The attacker may place a fake page asking for login, and ultimately collect your credentials.

Can I prevent this from happening?

Of course you can. By placing this code in your anchor tag, you can prevent your page from being used as a phishing surface.

rel="noopener"

If you are lazy enough to risk your security, I suggest a one time solution. Download this from github and include this file as a script source in your next document.

If you want to read further, I would advise you to follow the text on this page.

And finally,if you have any further queries, feel free to ask in the comments.

    Current date/time is Sat Mar 25, 2017 3:01 am