iPhone passcode security

[yahoojames]

I've noticed this behavior on my Jailbroken (Absinthe) iOS 5.0.1 iPhone 4S and wonder if it's by design or a security hole:

Lock the phone (ensure you have a 4 digit passcode set)
Test that it is indeed passcode locked by pressing the home button and slide to unlock (don't unlock it)
Use another phone to place a call to your iPhone (I used a landline)
Answer it
Press home
You now have full access to the iPhone

Basically, if you know the iPhone number, you can call it to unlock it.

Is this right?!

 

[reclusive46]

It must be a jailbreak bug as I just tried this on a stock version of ios and when you try to go back to the home screen it just asks for your pass code

 

[yahoojames]

Could someone verify if this is also a bug with a PwnageTool 5.0.1 jailbreak?

 

[siurpeeman]

Could someone verify if this is also a bug with a PwnageTool 5.0.1 jailbreak?

pressing the home button takes me to the slide to unlock where i have to put in my passcode.