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Date: Thu, 29 Mar 2018 10:37:44 -0700
From: Apple Product Security <product-security-noreply@...ts.apple.com>
To: security-announce@...ts.apple.com
Subject: APPLE-SA-2018-3-29-1 iOS 11.3

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APPLE-SA-2018-3-29-1 iOS 11.3

iOS 11.3 is now available and addresses the following:

Clock
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A person with physical access to an iOS device may be able to
see the email address used for iTunes
Description: An information disclosure issue existed in the handling
of alarms and timers. This issue was addressed through improved
access restrictions.
CVE-2018-4123: Zaheen Hafzar M M (@zaheenhafzer)

CoreFoundation
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: An application may be able to gain elevated privileges
Description: A race condition was addressed with additional
validation.
CVE-2018-4155: Samuel Groß (@5aelo)
CVE-2018-4158: Samuel Groß (@5aelo)

CoreText
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: Processing a maliciously crafted string may lead to a denial
of service
Description: A denial of service issue was addressed through improved
memory handling.
CVE-2018-4142: Robin Leroy of Google Switzerland GmbH

File System Events
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: An application may be able to gain elevated privileges
Description: A race condition was addressed with additional
validation.
CVE-2018-4167: Samuel Groß (@5aelo)

Files Widget
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: File Widget may display contents on a locked device
Description: The File Widget was displaying cached data when in the
locked state. This issue was addressed with improved state
management.
CVE-2018-4168: Brandon Moore

Find My iPhone
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A person with physical access to the device may be able to
disable Find My iPhone without entering an iCloud password
Description: A state management issue existed when restoring from a
back up. This issue was addressed through improved state checking
during restore.
CVE-2018-4172: Viljami Vastamäki

iCloud Drive
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: An application may be able to gain elevated privileges
Description: A race condition was addressed with additional
validation.
CVE-2018-4151: Samuel Groß (@5aelo)

Kernel
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A malicious application may be able to execute arbitrary code
with kernel privileges
Description: Multiple memory corruption issues were addressed with
improved memory handling.
CVE-2018-4150: an anonymous researcher

Kernel
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: An application may be able to read restricted memory
Description: A validation issue was addressed with improved input
sanitization.
CVE-2018-4104: The UK's National Cyber Security Centre (NCSC)

Kernel
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: A memory corruption issue was addressed with improved
memory handling.
CVE-2018-4143: derrek (@derrekr6)

Mail
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: An attacker in a privileged network position may be able to
intercept the contents of S/MIME-encrypted e-mail
Description: An inconsistent user interface issue was addressed with
improved state management.
CVE-2018-4174: an anonymous researcher, an anonymous researcher

NSURLSession
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: An application may be able to gain elevated privileges
Description: A race condition was addressed with additional
validation.
CVE-2018-4166: Samuel Groß (@5aelo)

PluginKit
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: An application may be able to gain elevated privileges
Description: A race condition was addressed with additional
validation.
CVE-2018-4156: Samuel Groß (@5aelo)

Quick Look
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: An application may be able to gain elevated privileges
Description: A race condition was addressed with additional
validation.
CVE-2018-4157: Samuel Groß (@5aelo)

Safari
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: Visiting a malicious website by clicking a link may lead to
user interface spoofing
Description: An inconsistent user interface issue was addressed with
improved state management.
CVE-2018-4134: xisigr of Tencent's Xuanwu Lab (tencent.com), Zhiyang
Zeng (@Wester) of Tencent Security Platform Department

Safari Login AutoFill
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A malicious website may be able to exfiltrate autofilled data
in Safari without explicit user interaction.
Description: Safari autofill did not require explicit user
interaction before taking place. The issue was addressed through
improved autofill heuristics.
CVE-2018-4137:

SafariViewController
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: Visiting a malicious website may lead to user interface
spoofing
Description: A state management issue was addressed by disabling text
input until the destination page loads.
CVE-2018-4149: Abhinash Jain (@abhinashjain)

Security
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A malicious application may be able to elevate privileges
Description: A buffer overflow was addressed with improved size
validation.
CVE-2018-4144: Abraham Masri (@cheesecakeufo)

Storage
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: An application may be able to gain elevated privileges
Description: A race condition was addressed with additional
validation.
CVE-2018-4154: Samuel Groß (@5aelo)

System Preferences
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A configuration profile may incorrectly remain in effect
after removal
Description: An issue existed in CFPreferences. This issue was
addressed through improved preferences cleanup.
CVE-2018-4115: Johann Thalakada, Vladimir Zubkov, and Matt Vlasach of
Wandera

Telephony
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A remote attacker can cause a device to unexpectedly restart
Description: A null pointer dereference issue existed when handling
Class 0 SMS messages. This issue was addressed through improved
message validation.
CVE-2018-4140: @mjonsson, Arjan van der Oest of Voiceworks BV

Web App
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: Cookies may unexpectedly persist in web app
Description: A cookie management issue was addressed through improved
state management.
CVE-2018-4110: Ben Compton and Jason Colley of Cerner Corporation

WebKit
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: Multiple memory corruption issues were addressed with
improved memory handling.
CVE-2018-4101: Yuan Deng of Ant-financial Light-Year Security Lab
CVE-2018-4114: found by OSS-Fuzz
CVE-2018-4118: Jun Kokatsu (@shhnjk)
CVE-2018-4119: an anonymous researcher working with Trend Micro's
Zero Day Initiative
CVE-2018-4120: Hanming Zhang (@4shitak4) of Qihoo 360 Vulcan Team
CVE-2018-4121: Natalie Silvanovich of Google Project Zero
CVE-2018-4122: WanderingGlitch of Trend Micro's Zero Day Initiative
CVE-2018-4125: WanderingGlitch of Trend Micro's Zero Day Initiative
CVE-2018-4127: an anonymous researcher working with Trend Micro's
Zero Day Initiative
CVE-2018-4128: Zach Markley
CVE-2018-4129: likemeng of Baidu Security Lab working with Trend
Micro's Zero Day Initiative
CVE-2018-4130: Omair working with Trend Micro's Zero Day Initiative
CVE-2018-4161: WanderingGlitch of Trend Micro's Zero Day Initiative
CVE-2018-4162: WanderingGlitch of Trend Micro's Zero Day Initiative
CVE-2018-4163: WanderingGlitch of Trend Micro's Zero Day Initiative
CVE-2018-4165: Hanming Zhang (@4shitak4) of Qihoo 360 Vulcan Team

WebKit
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: Unexpected interaction with indexing types causing an ASSERT
failure
Description: An array indexing issue existed in the handling of a
function in javascript core. This issue was addressed through
improved checks.
CVE-2018-4113: found by OSS-Fuzz

WebKit
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: Processing maliciously crafted web content may lead to a
denial of service
Description: A memory corruption issue was addressed through improved
input validation.
CVE-2018-4146: found by OSS-Fuzz

WebKit
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A malicious website may exfiltrate data cross-origin
Description: A cross-origin issue existed with the fetch API. This
was addressed through improved input validation.
CVE-2018-4117: an anonymous researcher, an anonymous researcher

WindowServer
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: An unprivileged application may be able to log keystrokes
entered into other applications even when secure input mode is
enabled
Description: By scanning key states, an unprivileged application
could log keystrokes entered into other applications even when secure
input mode was enabled. This issue was addressed by improved state
management.
CVE-2018-4131: Andreas Hegenberg of folivora.AI GmbH

Additional recognition

WebKit
We would like to acknowledge Johnny Nipper of Tinder Security Team
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 https://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 "11.3".

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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