About the security content of iOS 4.2.9 Software Update for iPhone

This document describes the security content of iOS 4.2.9 Software Update for iPhone.

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 4.2.9 Software Update for iPhone

• CoreGraphics

  Available for: iOS 4.2.5 through 4.2.8 for iPhone 4 (CDMA model)

  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 font files. 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 4.2.5 through 4.2.8 for iPhone 4 (CDMA model)

  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 4.2.5 through 4.2.8 for iPhone 4 (CDMA model)

  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