iOS 4.3.4 firmware IPSW download. Download iOS 4.3.4 firmware cho iPhone 4, iPhone 3GS, iPad 2, iPad 1 và iPod Touch 4G / 3G. iOS 4.3.4 firmware hỗ trợ fix PDF exploit trong JailbreakMe 3.0 to jailbreak iPad 2.

Apple’s support document details the technical fixes:

Impact: Viewing a maliciously crafted PDF file may lead to an unexpected application termination or arbitrary code execution

Description: A buffer overflow exists in FreeType’s handling of TrueType fonts. Viewing a maliciously crafted PDF file may lead to an unexpected application termination or arbitrary code execution.

For those who don’t know, PDF vulnerability was used by Comex in his JailbreakMe 3.0 to jailbreak iOS 4.3.3 on iPod Touch 4G, 3G, iPhone 4, 3GS and iPad 2, iPad 1.

ATTENTION: Jailbreakers/unlockers must stay away from iOS 4.3.4 if they want to keep Cydia and other installed jailbreak tweaks.

How to Isntall iOS 4.3.4

Connect your iPhone/iPod Touch/iPad to iTunes, new firmware 4.3.4 availability message will appear then hit the “Download and Install” button. (Not recommended for jailbreakers and unlockers)

You can also download iOS 4.3.4 firmware from the links below. Hold down the Shit (Windows) or Alt/Option (Mac) key and hit the restore button on iTunes and select the downloaded IPSW file.

iOS 4.3 was released on March 10, iOS 4.3.1 on March 25th, and iOS 4.3.2 on April 14 and iOS 4.3.3 on May 5th this year.