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APPLE-SA-2017-01-23-1 iOS 10.2.1

iOS 10.2.1 is now available and addresses the following:

Auto Unlock
Available for:  iPhone 5 and later, iPad 4th generation and later,
iPod touch 6th generation and later
Impact: Auto Unlock may unlock when Apple Watch is off the user's
wrist
Description: A logic issue was addressed through improved state
management.
CVE-2017-2352: Ashley Fernandez of raptAware Pty Ltd

Contacts
Available for:  iPhone 5 and later, iPad 4th generation and later,
iPod touch 6th generation and later
Impact: Processing a maliciously crafted contact card may lead to
unexpected application termination
Description: An input validation issue existed in the parsing of
contact cards. This issue was addressed through improved input
validation.
CVE-2017-2368: Vincent Desmurs (vincedes3)

Kernel
Available for:  iPhone 5 and later, iPad 4th generation and later,
iPod touch 6th generation and later
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: A buffer overflow issue was addressed through improved
memory handling.
CVE-2017-2370: Ian Beer of Google Project Zero

Kernel
Available for:  iPhone 5 and later, iPad 4th generation and later,
iPod touch 6th generation and later
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: A use after free issue was addressed through improved
memory management.
CVE-2017-2360: Ian Beer of Google Project Zero

libarchive
Available for:  iPhone 5 and later, iPad 4th generation and later,
iPod touch 6th generation and later
Impact: Unpacking a maliciously crafted archive may lead to arbitrary
code execution
Description: A buffer overflow issue was addressed through improved
memory handling.
CVE-2016-8687: Agostino Sarubbo of Gentoo

WebKit
Available for:  iPhone 5 and later, iPad 4th generation and later,
iPod touch 6th generation and later
Impact: Processing maliciously crafted web content may exfiltrate
data cross-origin
Description: A prototype access issue was addressed through improved
exception handling.
CVE-2017-2350: Gareth Heyes of Portswigger Web Security

WebKit
Available for:  iPhone 5 and later, iPad 4th generation and later,
iPod touch 6th generation and later
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: Multiple memory corruption issues were addressed through
improved memory handling.
CVE-2017-2354: Neymar of Tencent's Xuanwu Lab (tencent.com) working
with Trend Micro's Zero Day Initiative
CVE-2017-2362: Ivan Fratric of Google Project Zero
CVE-2017-2373: Ivan Fratric of Google Project Zero

WebKit
Available for:  iPhone 5 and later, iPad 4th generation and later,
iPod touch 6th generation and later
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: A memory initialization issue was addressed through
improved memory handling.
CVE-2017-2355: Team Pangu and lokihardt at PwnFest 2016

WebKit
Available for:  iPhone 5 and later, iPad 4th generation and later,
iPod touch 6th generation and later
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: Multiple memory corruption issues were addressed through
improved input validation.
CVE-2017-2356: Team Pangu and lokihardt at PwnFest 2016
CVE-2017-2366: Kai Kang of Tencent's Xuanwu Lab (tencent.com)
CVE-2017-2369: Ivan Fratric of Google Project Zero

WebKit
Available for:  iPhone 5 and later, iPad 4th generation and later,
iPod touch 6th generation and later
Impact: Processing maliciously crafted web content may exfiltrate
data cross-origin
Description: Multiple validation issues existed in the handling of
page loading. This issue was addressed through improved logic.
CVE-2017-2363: lokihardt of Google Project Zero
CVE-2017-2364: lokihardt of Google Project Zero

WebKit
Available for:  iPhone 5 and later, iPad 4th generation and later,
iPod touch 6th generation and later
Impact: A malicious website can open popups
Description: An issue existed in the handling of blocking popups.
This was addressed through improved input validation.
CVE-2017-2371: lokihardt of Google Project Zero

WebKit
Available for:  iPhone 5 and later, iPad 4th generation and later,
iPod touch 6th generation and later
Impact: Processing maliciously crafted web content may exfiltrate
data cross-origin
Description: A validation issue existed in variable handling. This
issue was addressed through improved validation.
CVE-2017-2365: lokihardt of Google Project Zero

WiFi
Available for:  iPhone 5 and later, iPad 4th generation and later,
iPod touch 6th generation and later
Impact: An activation-locked device can be manipulated to briefly
present the home screen
Description: An issue existed with handling user input that caused a
device to present the home screen even when activation locked. This
was addressed through improved input validation.
CVE-2017-2351: Sriram (@Sri_Hxor) of Primefort Pvt. Ltd., Hemanth
Joseph

Additional recognition

WebKit hardening
We would like to acknowledge Ben Gras, Kaveh Razavi, Erik Bosman,
Herbert Bos, and Cristiano Giuffrida of the vusec group at
Vrije Universiteit Amsterdam for their assistance.

Installation note:

This update is available through iTunes and Software Update on your
iOS device, and will not appear in your computer's Software Update
application, or in the Apple Downloads site. Make sure you have an
Internet connection and have installed the latest version of iTunes
from www.apple.com/itunes/

iTunes and Software Update on the device will automatically check
Apple's update server on its weekly schedule. When an update is
detected, it is downloaded and the option to be installed is
presented to the user when the iOS device is docked. We recommend
applying the update immediately if possible. Selecting Don't Install
will present the option the next time you connect your iOS device.

The automatic update process may take up to a week depending on the
day that iTunes or the device checks for updates. You may manually
obtain the update via the Check for Updates button within iTunes, or
the Software Update on your device.

To check that the iPhone, iPod touch, or iPad has been updated:

* Navigate to Settings
* Select General
* Select About. The version after applying this update
will be "10.2.1".

Information will also be posted to the Apple Security Updates
web site: https://support.apple.com/kb/HT201222

This message is signed with Apple's Product Security PGP key,
and details are available at:
https://www.apple.com/support/security/pgp/
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