蘋果發(fā)布了iOS 4.3.4版固件，修復(fù)了更新4.3.3中Safari瀏覽器PDF文件漏洞。這樣就不能使用JailbreakMe進(jìn)行越獄了。如果想越獄的朋友就別升級了，因?yàn)闆]功能更新；如果不越獄的朋友就更新一下吧，PDF文件漏洞還是很嚴(yán)重的。

iOS 4.3.4的版本號為build 8K2，同時針對CDMA版iPhone 4推出的iOS 4.2.9則為Build 8E501。以下為各機(jī)型iOS 4.3.4固件下載地址：

iPhone 4
http://appldnld.apple.com/iPhone4/041-1923.20110715.BnATg/iPhone3,1_4.3.4_8K2_Restore.ipsw

iPhone 3GS
http://appldnld.apple.com/iPhone4/041-1921.20110715.ItuLh/iPhone2,1_4.3.4_8K2_Restore.ipsw

iPad 2 WiFi版
http://appldnld.apple.com/iPhone4/041-1924.2011.0715.qP4r3/iPad2,1_4.3.4_8K2_Restore.ipsw

iPad
http://appldnld.apple.com/iPhone4/041-1913.20110715.cvTyu/iPad1,1_4.3.4_8K2_Restore.ipsw

iPod touch第四代
http://appldnld.apple.com/iPhone4/041-1918.20110715.MgWsk/iPod4,1_4.3.4_8K2_Restore.ipsw

iPod touch第三代
http://appldnld.apple.com/iPhone4/041-1919.20110715.ShHh4/iPod3,1_4.3.4_8K2_Restore.ipsw

iPad 2 GSM/WCDMA 3G
http://appldnld.apple.com/iPhone4/041-1914.20110715.Xdw2Q/iPad2,2_4.3.4_8K2_Restore.ipsw

iPad 2 CDMA 3G
http://appldnld.apple.com/iPhone4/041-1917.2011.715.ZbLkn/iPad2,3_4.3.4_8K2_Restore.ipsw

CDMA iPhone 4 iOS 4.2.9
http://appldnld.apple.com/iPhone4/041-1916.20110715.V5rUA/iPhone3,3_4.2.9_8E501_Restore.ipsw