Passcode? What passcode? Software can brute force its way on jailbroken iOS devices
Of course, that also potentially opens the world to your device as well. Recently some folks assembled some hardware, literally a little black box, that could brute-force its way through the PIN lock on an iPhone, jailbroken or not, running iOS 8.1 or later. The trick was that it could cut power to the device before it could log the failed attempt, thus not triggering the passcode counter.
Now, someone has developed a software solution called TransLock, a brute force utility program. The difference however, is that TransLock will only work on jailbroken iOS devices. Unlike a locked down device, the utility can simply override any retry limit since the typical software limits have been bypassed, enabling the program to work through a different four-number combination every 5 seconds.
Naturally the workaround is to use a stronger character-based password. Of course, even then there is no guarantee given how most of us are with passwords too. TransLock can be found through portals like GitHub, though the maker, Majd Alfhaily, says he will distribute it as well.
source: Redmond Pie