About the security content of iOS 4.3.4 Software Update

This document describes the security content of the iOS 4.3.4 Software Update.

For the protection of our customers, Apple does not disclose, discuss, or confirm security issues until a full investigation has occurred and any necessary patches or releases are available. To learn more about Apple Product Security, see the Apple Product Security website.

For information about the Apple Product Security PGP Key, see "How to use the Apple Product Security PGP Key."

Where possible, CVE IDs are used to reference the vulnerabilities for further information.

To learn about other Security Updates, see "Apple Security Updates."

iOS 4.3.4 Software Update

• CoreGraphics

  Available for: iOS 3.0 through 4.3.3 for iPhone 3GS and iPhone 4 (GSM model), iOS 3.1 through 4.3.3 for iPod touch (3rd generation) and later, iOS 3.2 through 4.3.3 for iPad

  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.

  CVE-ID

  CVE-2010-3855

• CoreGraphics

  Available for: iOS 3.0 through 4.3.3 for iPhone 3GS and iPhone 4 (GSM model), iOS 3.1 through 4.3.3 for iPod touch (3rd generation) and later, iOS 3.2 through 4.3.3 for iPad

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

  Description: A signedness issue exists in FreeType's handling of Type 1 fonts. Viewing a maliciously crafted PDF file may lead to an unexpected application termination or arbitrary code execution.

  CVE-ID

  CVE-2011-0226 : comex

• IOMobileFrameBuffer

  Available for: iOS 3.0 through 4.3.3 for iPhone 3GS and iPhone 4 (GSM model), iOS 3.1 through 4.3.3 for iPod touch (3rd generation) and later, iOS 3.2 through 4.3.3 for iPad

  Impact: Malicious code running as the user may gain system privileges

  Description: An invalid type conversion issue exists in the use of IOMobileFrameBuffer queueing primitives, which may allow malicious code running as the user to gain system privileges.

  CVE-ID

  CVE-2011-0227 : comex