It was recently discovered that a Russian hacker had been hijacking Apple’s iOS in-app purchasing system to score paid upgrades for free. The trick was accomplished by bypassing Apple’s authentication servers and routing an in-app purchase through a proxy that sent back a faulty purchase receipt.
While Apple has already attempted to combat this activity, today the company outlined a solution for developers to keep their in-app purchases safe from such an exploit. Apple has also confirmed that the issue will be fixed when iOS 6 ships to the public this fall.