About the security content of iOS 9.2.1

This document describes the security content of iOS 9.2.1.

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 9.2.1

• Disk Images

  Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later

  Impact: A local user may be able to execute arbitrary code with kernel privileges

  Description: A memory corruption issue existed in the parsing of disk images. This issue was addressed through improved memory handling.

  CVE-ID

  CVE-2016-1717 : Frank Graziano of Yahoo! Pentest Team

• IOHIDFamily

  Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later

  Impact: A local user may be able to execute arbitrary code with kernel privileges

  Description: A memory corruption issue existed in an IOHIDFamily API. This issue was addressed through improved memory handling.

  CVE-ID

  CVE-2016-1719 : Ian Beer of Google Project Zero

• IOKit

  Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later

  Impact: A local user may be able to execute arbitrary code with kernel privileges

  Description: A memory corruption issue was addressed through improved memory handling.

  CVE-ID

  CVE-2016-1720 : Ian Beer of Google Project Zero

• Kernel

  Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later

  Impact: A local user may be able to execute arbitrary code with kernel privileges

  Description: A memory corruption issue was addressed through improved memory handling.

  CVE-ID

  CVE-2016-1721 : Ian Beer of Google Project Zero and Ju Zhu of Trend Micro

• libxslt

  Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later

  Impact: Visiting a maliciously crafted website may lead to arbitrary code execution

  Description: A type confusion issue existed in libxslt. This issue was addressed through improved memory handling.

  CVE-ID

  CVE-2015-7995 : puzzor

• syslog

  Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later

  Impact: A local user may be able to execute arbitrary code with root privileges

  Description: A memory corruption issue was addressed through improved memory handling.

  CVE-ID

  CVE-2016-1722 : Joshua J. Drake and Nikias Bassen of Zimperium zLabs

• WebKit

  Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later

  Impact: Visiting a maliciously crafted website may lead to arbitrary code execution

  Description: Multiple memory corruption issues existed in WebKit. These issues were addressed through improved memory handling.

  CVE-ID

  CVE-2016-1723 : Apple

  CVE-2016-1724 : Apple

  CVE-2016-1725 : Apple

  CVE-2016-1726 : Apple

  CVE-2016-1727 : Apple

• WebKit CSS

  Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later

  Impact: Websites may know if the user has visited a given link

  Description: A privacy issue existed in the handling of the "a:visited button" CSS selector when evaluating the containing element's height. This was addressed through improved validation.

  CVE-ID

  CVE-2016-1728 : an anonymous researcher coordinated via Joe Vennix

• WebSheet

  Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later

  Impact: A malicious captive portal may be able to access the user's cookies

  Description: An issue existed that allowed some captive portals to read or write cookies. The issue was addressed through an isolated cookie store for all captive portals.

  CVE-ID

  CVE-2016-1730 : Adi Sharabani and Yair Amit of Skycure