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Published in TidBITS 1085.
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iPhone iPad iPod | 15 Jul 2011 | Listen  | Print Printer-Friendly Version of This Article | Comment (2)

iOS 4.3.4 and 4.2.9 Fix PDF Vulnerability

by Adam C. Engst Send Email to Author

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Apple has released iOS 4.3.4 for the GSM iPhone 4 and 3GS, the iPad and iPad 2, and the 3rd and 4th generations of the iPod touch, along with iOS 4.2.9 for the CDMA iPhone 4. Both updates address a security vulnerability associated with viewing a malicious PDF file. Also fixed is a vulnerability that could enable malicious code running as the user to gain system privileges.

The PDF-based vulnerability, caused by a buffer overflow in the handling of TrueType and Type 1 fonts, was used in a recent jailbreaking effort — by definition, jailbreaking involves exploiting a security hole in iOS.

The updates are available only via iTunes, and despite the minimal changes, they’re big, so allot plenty of time to download and install.

Check out the Take Control ebooks that expand on the topic in this article:

Take Control of iPhone Basics, iOS 4 Edition
Decide which iPhone and accessories to buy, set everything up nicely (including transferring data from a computer), find your way around, and use the apps effectively. Updated in 2011 to discuss the Verizon iPhone! Also now covers buying, making, and using ringtones.

 

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Comments about iOS 4.3.4 and 4.2.9 Fix PDF Vulnerability

Ron Kraus  2011-07-18 07:15
No kidding about taking some time. I have a pretty fast cable Internet connection and this thing takes about 25 minutes.
Mark Martinez  2011-07-19 07:21
58 minutes to download the update on my pokey 1.5Mbs DSL connection.