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

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Last Modified: Jan 14, 2016