All devs,
Can someone tell how to find if there's a backdoor in your Android phone or custom ROM installed?

Learn C, go through the kernel, decompile system apk and analyse the code, monitor network activity of the phone to see if phone is sending any data to suspicious servers.

@sachin38 easy, right?

@master98ofu yeah, to instruct!

@sachin38 No need to do that. There are many backdoors in such a big system. Some intentionally, some by mistake.
But one's fore sure, the probability for a backdoor free system is 0.

@ddephor Indeed, security is an illusion!

@ddephor Unintentional backdoors? How come Sir?

@Haxk20 This sounds tricky to do, but I think I should give it a try.. Can anyone pls tell how should I start or what tools to use to monitor the kernel or is the terminal enough to do so.. I'm kinda new to all this,so don't mind all you awesome devs .. 😁

@sachin38 So can be there an intention to make custom ROMs just to have backdoors in people's phone ?

Dirty Cow in linux, stagefright in android and the smb vulnerability in windows was because of unintentional backdoor.

@sachin38 oh.. gotcha! Thanks for the info man :)

@sanketthecoder Some errors open backdoors to systems, they are mostly called 'exploit', but many of them can function as a backdoor.

Sometimes external code is used without the knowledge of backdoors in it, which may have been intentional in the original environment.

Sometimes it's just bad configuration, like opening network ports by error or setting up some kind of access without proper security, just because the one who did it, didn't know what he was doing.

@ddephor Ohh my.. And surprisingly all these cases are normal to occur in the development process.. Got the reason.. Thank you Sir 😊

Boot into bootloader and see if it is unlocked, them there is or should be a custom Rom installed or the phone was only rooted.

Let me save you the time, yes there are backdoors.

@g-m-f 😂😂😂👌👌