February 2018
Beginner to intermediate
426 pages
10h 25m
English
book
Web Penetration Testing with Kali Linux - Third Edition
by Daniel W. Dieterle, Gilberto Najera-Gutierrez, Juned Ahmed Ansari
Content preview from Web Penetration Testing with Kali Linux - Third Edition
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Vulnerabilities in 2FA implementations
The most common form of MFA in web applications is the use of a randomly generated number (four to eight digits) used as OTP that the user gets from a special device, a mobile app (such as Google Authenticator, Authy, 1Password, or LastPass Authenticator), or through an SMS or email sent by the server on request.
You can detect and take advantage of some implementation flaws in this process during a penetration test when the following conditions exist:
- OTP numbers are not completely random and can be predicted.
- OTPs are not linked to the user to whom they are assigned. This means that you can generate an OTP for one user and use it with another.
- The same password or token can be used multiple times. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.