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

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".

Source: Apple - Support - Most Recent - iPhone