After a recent report from the German government regarding PDF-related security vulnerabilities in MobileSafari, Apple has released updates for all iOS devices that fix the problem.

Though they both fix the same three vulnerabilities, the patch comes in two versions, thanks to the different flavours of the iPhone 4. iOS 4.3.4 applies to the iPad and iPad 2, the third- and fourth-generation iPod touch, the iPhone 3GS, and the iPhone 4 (GSM model); users of the CDMA model of the iPhone 4 instead get iOS 4.2.9.