About the security content of the iOS 4.0.2 Update for iPhone and iPod touch

Summary

This document describes the security content of iOS 4.0.2 Update for iPhone and iPod touch, which can be downloaded and installed using iTunes.
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".

Products Affected

iPhone, Product Security, iPod touch

iOS 4.0.2 Update for iPhone and iPod touch

• FreeType
  CVE-ID: CVE-2010-1797
  Available for: iOS 2.0 through 4.0.1 for iPhone 3G and later, iOS 2.1 through 4.0 for iPod touch (2nd generation) and later
  Impact: Viewing a PDF document with maliciously crafted embedded fonts may allow arbitrary code execution
  Description: A stack buffer overflow exists in FreeType's handling of CFF opcodes. Viewing a PDF document with maliciously crafted embedded fonts may allow arbitrary code execution. This issue is addressed through improved bounds checking.
  

• IOSurface
  CVE-ID: CVE-2010-2973
  Available for: iOS 2.0 through 4.0.1 for iPhone 3G and later, iOS 2.1 through 4.0 for iPod touch (2nd generation) and later
  Impact: Malicious code running as the user may gain system privileges
  Description: An integer overflow exists in the handling of IOSurface properties, which may allow malicious code running as the user to gain system privileges. This issue is addressed through improved bounds checking.