About the security content of iOS 5.1.1 Software Update

This document describes the security content of iOS 5.1.1 Software Update.

iOS 5.1.1 Software Update 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".

iOS 5.1.1 Software Update

• Safari

  Available for: iPhone 3GS, iPhone 4, iPhone 4S, iPod touch (3rd generation) and later, iPad, iPad 2

  Impact: A maliciously crafted website may be able to spoof the address in the location bar

  Description: A URL spoofing issue existed in Safari. This could be used in a malicious web site to direct the user to a spoofed site that visually appeared to be a legitimate domain. This issue is addressed through improved URL handling. This issue does not affect OS X systems.

  CVE-ID

  CVE-2012-0674 : David Vieira-Kurz of MajorSecurity (majorsecurity.net)

• WebKit

  Available for: iPhone 3GS, iPhone 4, iPhone 4S, iPod touch (3rd generation) and later, iPad, iPad 2

  Impact: Visiting a maliciously crafted website may lead to a cross-site scripting attack

  Description: Multiple cross-site scripting issues existed in WebKit.

  CVE-ID

  CVE-2011-3046 : Sergey Glazunov working with Google's Pwnium contest

  CVE-2011-3056 : Sergey Glazunov

• WebKit

  Available for: iPhone 3GS, iPhone 4, iPhone 4S, iPod touch (3rd generation) and later, iPad, iPad 2

  Impact: Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution

  Description: A memory corruption issue existed in WebKit.

  CVE-ID

  CVE-2012-0672 : Adam Barth and Abhishek Arya of the Google Chrome Security Team