Root is a term for the Android system, which allows users to obtain superuser rights of the Android operating system. Root can help users bypass the restrictions of mobile phone manufacturers and uninstall their own pre-installed programs or run actions that require system permissions. Rooting the Android system is similar to jailbreaking the Apple iOS system.
Most mobile phone manufacturers do not support obtaining Root permissions. Therefore, most methods of obtaining Root are achieved by using specific tools with the help of system vulnerabilities or official backdoors. Different mobile phone manufacturers, systems and versions may have different vulnerabilities, so the root principles, methods and difficulty of different mobile phones may be different.
Root needs to copy the su executable file to the /system partition of the Android system (for example: /system/xbin/su) and use the chmod command to set executable permissions and setuid permissions for it. In order to allow users to control the use of Root permissions and prevent any application on the phone from directly obtaining Root permissions, users usually copy (install) the Root management program to /system/app to manage the use of the su program.
One of the widely exploited system vulnerabilities is zergRush, which is applicable to Android 2.2-2.3.6 systems and therefore applicable to many Android system phones. Other vulnerabilities include Gingerbreak, psneuter] and so on.
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