Update: We are now receiving reports that the vulnerability has been patched. People trying to use the tool are apparently now being correctly locked out from repeated password attempts.
A new tool submitted to GitHub claims to be able to perform password dictionary attacks on any iCloud account, seemingly able to evade detection from Apple’s rate-limiting security that is supposed to prevent such dictionary attacks from happening. In September, Apple reported it had closed one such hole that allowed brute-force attacks to occur.
The sourcecode for the tool has been released onto GitHub. Upon inspection, the tool is really rather crude in its complexity. It simply tries every possible word in its 500-long word-list as the password for a given iCloud account email. This means whilst it will succeed “100%” at trying 500 times over, the tool is by no means guaranteed to succeed at cracking your password.