Apple released iOS 9.2.1 Tuesday, an update that fixes an issue with mobile device management (MDM) servers. The update also includes security fixes for 9 different security holes, most of which allow the bad guys to take over your iOS device.
Screenshot from iOS 9.2.1 Update
You can download the update on your iOS device through Settings -> General -> Software Update, where it's a 40.8MB download for iPhone 6s or a 35.2MB download for iPad Air. It's a 2.01GB download through iTunes for iPhone 6s.
Please post your update experience in the comments below.
As noted in the image above, Apple's patch notes for the update are sparse:
This update contains security updates and bug fixes including a fix for an issue that could prevent the completion of app installation when using an MDM server.
The Security Update document for the update goes into detail on 9 different security holes patched.
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