Web Hacking Expert - Full-Stack Exploitation Mastery - User Redirection through window.opener Tabnabbing – Part 2

The video tutorial explains how to prevent a specific web attack using the 'rel=noopener' attribute in HTML links. It demonstrates the attack mechanism, where an attacker can overwrite the opener location, and provides a simple countermeasure to prevent this. The tutorial includes a code walkthrough and a summary of the attack and its prevention.

What attribute should be added to a link to prevent a specific web attack?

• class='safe-link'

• href='secure'

• target='_self'

• rel='noopener'

What is the main purpose of using the 'rel' attribute with 'no opener' in a link?

• To prevent the link from being indexed by search engines

• To ensure the link opens in the same tab

• To enhance the visual appearance of the link

• To stop attackers from overriding the opener property

In the context of the attack discussed, what does the attacker exploit?

• The href attribute

• The target attribute

• The class attribute

• The opener property

What is the crucial line of code used by the attacker in the example?

• document.write('Attack successful')

• window.open('https://attacker.local')

• opener.location = 'https://attacker.local/redirection.html'

• alert('You have been hacked')

What is the main takeaway from the video regarding preventing the attack?

• Always use HTTPS for all links

• Avoid using any links on your website

• Implement the 'rel' attribute with 'no opener'

• Use JavaScript to validate all links