Authentication Bypass in PHP | PHP Type Juggling

Published: 25 October 2021
on channel: CyberSecurityTV
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Authentication Bypass in PHP | PHP Type Juggling

Much like Python and Javascript, PHP is a dynamically typed language. This means that variable types are checked while the program is executing.

PHP has a feature called “type juggling”, or “type coercion”. This means that during the comparison of variables of different types, PHP will first convert them to a common, comparable type.

In this episode, we will learn about how the type of juggling can be exploited to bypass authentication.

01:12 What is Type Juggling
04:16 PHP Type Comparision
05:36 Example
06:36 Null Condition
07:45 Demo

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