As everyone has been expecting, Apple has just now released its latest update for the iOS 4, the iOS 4.3.4 which is now on iTunes. Not much is known about this particular update but it is expected to have minor fixes for better performance and stability. But one of the biggest reason for this update was most likely to patch the PDF exploit found in Mobile Safari, which was the same exploit used by Comex's Jailbreak 3.0 tool.
And just like that, it has been confirmed that iOS 4.3.4 has permanently shut the door on untethered jailbreaks using the extremely popular Jailbreak 3.0. Read the complete release notes of iOS 4.3.4 from Apple here.
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.
In case you haven't been paying attention, Jailbreak 3.0 is a jailbreaking tool which as mentioned, uses a PDF exploit in Safari which can easily jailbreak an iOS device by simply downloading a file. Since this exploit has the potential to be used to distribute malicious content, this has been patched by Comex by releasing PDF Patcher 2 fix in Cydia, so ironically, before this iOS firmware update, the only way to protect your device is by jailbreaking it.
While this iOS firmware release was expected, the timing rather feels rushed or forced, which is understandable in the part of Apple. Those who have not jailbroken their iDevice have no way of protecting themselves from the security exploit. It is a clear threat to Apple's security that it needs to be addressed right away.
It should be a no brainer that all those who have jailbroken their device (especially iPad 2 owners) using Jailbreak 3.0 should stay away from this firmware update. Why? Because it will most likely disable your jailbreak. Seeing as there are no major changes to this new update except for patching a security hole, then you are better off downloading and installing PDF Patcher 2 over at Cydia if you haven't already. Or you can just wait for the next major version of the iOS, the iOS 5 which is coming this fall. If you haven't jailbroken your device, then by all means update to iOS 4.3.4 as soon as possible.
After connecting your device to the computer and launching iTunes, it should prompt you about the newest firmware version update for your device. If not, then click on your device at the left side panel and click "Check for Updates", then click "Download and Install". But if you want to install manually, we have provided direct download links below, courtesy of Apple.
iOS 4.3.4 IPSW Direct Download Links:
- Download iOS 4.3.4 IPSW for iPhone 4 (GSM) (iPhone3,1_4.3.4_8K2_Restore.ipsw)
- Download iOS 4.3.4 IPSW for iPhone 3GS (iPhone2,1_4.3.4_8K2_Restore.ipsw)
- Download iOS 4.3.4 IPSW for iPad 2 WiFi (iPad2,1_4.3.4_8K2_Restore.ipsw)
- Download iOS 4.3.4 IPSW for iPad 2 GSM (iPad2,2_4.3.4_8K2_Restore.ipsw)
- Download iOS 4.3.4 IPSW for iPad 2 CDMA (iPad2,3_4.3.4_8K2_Restore.ipsw)
- Download iOS 4.3.4 IPSW for iPod touch 3G (iPod3,1_4.3.4_8K2_Restore.ipsw)
- Download iOS 4.3.4 IPSW for iPod touch 4G (iPod4,1_4.3.4_8K2_Restore.ipsw)
After downloading the respective firmware for your device, just launch iTunes and click on your device on the left side panel. Now while pressing the SHIFT key (Windows) or Alt key (Mac) click on Restore to browse for the iOS 4.3.4 IPSW.Contact Us for News Tips, Corrections and Feedback