Just after the release of JailbreakMe 3.0, Apple team has rolled out iOS 4.3.4 update to patch the PDF vulnerability. Earlier Comex had released his jailbreak tool, which uses the exploit found in iOS software.
Apple team has fixed this hole and has pushed iOS 4.3.4 update for iDevices. iOS 4.3.4 supports iPod Touch 3G, iPod Touch 4G, iPhone 3GS, iPhone 4, iPad 1 and iPad 2.
If you don’t care about the untethered jailbreak, you can safely download this firmware update from iTunes software. However, jailbreakers should stay away from this update, as it will not allow you to use jailbreaking facilities after updating the device.
Download iOS 4.3.4 Firmware for iPod Touch, iPhone and iPad
Along with iOS 4.3.4 update, Apple has released iOS 4.2.9 firmware for CDMA iPhone 4 devices. Download Link
[...] Apple released iOS 4.3.4 firmware update for all the iDevices, which is nothing but a fix for the PDF vulnerability used in JailbreakMe 3.0 [...]
[...] released another update, iOS 4.3.5, for iDevices. Two weeks back on July 15th, Apple had released iOS 4.3.4 firmware update to patch the JailbreakMe 3.0 exploit and now they have addressed another security [...]