In its never-ending quest to control hardware it doesn’t own, Apple released a more secure version of iOS. According to Apple, the new 4.3.4 iOS addresses a security flaw that might have allowed “malicious code running as the user to gain system privileges,” according to Apple.
In other words, the 4.3.3 version opened the door for “jailbreakers”–people who take control of their devices’ operating systems so as to download non-Apple-approved apps. They were able to get in using Safari’s PDF-reading function. That access has now been denied, but within 24 hours of the fix, hackers had found another way in.
Read more at CIO.