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APPLE-SA-2019-5-13-1 iOS 12.3

iOS 12.3 is now available and addresses the following:

AppleFileConduit
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
system privileges
Description: A memory corruption issue was addressed with improved
memory handling.
CVE-2019-8593: Dany Lisiansky (@DanyL931)

Contacts
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A malicious application may be able to read restricted memory
Description: An input validation issue was addressed with improved
input validation.
CVE-2019-8598: Omer Gull of Checkpoint Research

CoreAudio
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: Processing a maliciously crafted movie file may lead to
arbitrary code execution
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2019-8585: riusksk of VulWar Corp working with Trend Micro's Zero
Day Initiative

Disk Images
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A malicious application may be able to read restricted memory
Description: An out-of-bounds read was addressed with improved bounds
checking.
CVE-2019-8560: Nikita Pupyshev of Bauman Moscow State Technological
University

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 system privileges
Description: A use after free issue was addressed with improved
memory management.
CVE-2019-8605: Ned Williamson working with Google Project Zero

Kernel
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A local user may be able to cause unexpected system
termination or read kernel memory
Description: An out-of-bounds read was addressed with improved bounds
checking.
CVE-2019-8576: Brandon Azad of Google Project Zero, unho Jang and
Hanul Choi of LINE Security Team

Kernel
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: An application may be able to cause unexpected system
termination or write kernel memory
Description: A type confusion issue was addressed with improved
memory handling.
CVE-2019-8591: Ned Williamson working with Google Project Zero

Lock Screen
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: A logic issue was addressed with improved restrictions.
CVE-2019-8599: Jeremy Peña-Lopez (aka Radio) of the University of
North Florida

Mail
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: Processing a maliciously crafted message may lead to a denial
of service
Description: An input validation issue was addressed with improved
input validation.
CVE-2019-8626: Natalie Silvanovich of Google Project Zero

Mail Message Framework
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A remote attacker may be able to cause arbitrary code
execution
Description: A use after free issue was addressed with improved
memory management.
CVE-2019-8613: Natalie Silvanovich of Google Project Zero

MobileInstallation
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A local user may be able to modify protected parts of the
file system
Description: A validation issue existed in the handling of symlinks.
This issue was addressed with improved validation of symlinks.
CVE-2019-8568: Dany Lisiansky (@DanyL931)

MobileLockdown
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A malicious application may be able to gain root privileges
Description: An input validation issue was addressed with improved
input validation.
CVE-2019-8637: Dany Lisiansky (@DanyL931)

Photos Storage
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A sandboxed process may be able to circumvent sandbox
restrictions
Description: An access issue was addressed with additional sandbox
restrictions.
CVE-2019-8617: an anonymous researcher

SQLite
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: An input validation issue was addressed with improved
memory handling.
CVE-2019-8577: Omer Gull of Checkpoint Research

SQLite
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A maliciously crafted SQL query may lead to arbitrary code
execution
Description: A memory corruption issue was addressed with improved
input validation.
CVE-2019-8600: Omer Gull of Checkpoint Research

SQLite
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A malicious application may be able to read restricted memory
Description: An input validation issue was addressed with improved
input validation.
CVE-2019-8598: Omer Gull of Checkpoint Research

SQLite
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 memory corruption issue was addressed by removing the
vulnerable code.
CVE-2019-8602: Omer Gull of Checkpoint Research

Status Bar
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: The lock screen may show a locked icon after unlocking
Description: The issue was addressed with improved UI handling.
CVE-2019-8630: Jon M. Morlan

StreamingZip
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A local user may be able to modify protected parts of the
file system
Description: A validation issue existed in the handling of symlinks.
This issue was addressed with improved validation of symlinks.
CVE-2019-8568: Dany Lisiansky (@DanyL931)

sysdiagnose
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
system privileges
Description: A memory corruption issue was addressed with improved
memory handling.
CVE-2019-8574: Dayton Pidhirney (@_watbulb) of Seekintoo (@seekintoo)

WebKit
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: Processing maliciously crafted web content may result in the
disclosure of process memory
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2019-8607: Junho Jang and Hanul Choi of LINE Security Team

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-2019-6237: G. Geshev working with Trend Micro Zero Day
Initiative, Liu Long of Qihoo 360 Vulcan Team
CVE-2019-8571: 01 working with Trend Micro's Zero Day Initiative
CVE-2019-8583: sakura of Tencent Xuanwu Lab, jessica (@babyjess1ca_)
of Tencent Keen Lab, and dwfault working at ADLab of Venustech
CVE-2019-8584: G. Geshev of MWR Labs working with Trend Micro Zero
Day Initiative
CVE-2019-8586: an anonymous researcher
CVE-2019-8587: G. Geshev working with Trend Micro Zero Day Initiative
CVE-2019-8594: Suyoung Lee and Sooel Son of KAIST Web Security &
Privacy Lab and HyungSeok Han and Sang Kil Cha of KAIST SoftSec Lab
CVE-2019-8595: G. Geshev from MWR Labs working with Trend Micro Zero
Day Initiative
CVE-2019-8596: Wen Xu of SSLab at Georgia Tech
CVE-2019-8597: 01 working with Trend Micro Zero Day Initiative
CVE-2019-8601: Fluoroacetate working with Trend Micro's Zero Day
Initiative
CVE-2019-8608: G. Geshev working with Trend Micro Zero Day Initiative
CVE-2019-8609: Wen Xu of SSLab, Georgia Tech
CVE-2019-8610: Anonymous working with Trend Micro Zero Day Initiative
CVE-2019-8611: Samuel Groß of Google Project Zero
CVE-2019-8615: G. Geshev from MWR Labs working with Trend Micro's
Zero Day Initiative
CVE-2019-8619: Wen Xu of SSLab at Georgia Tech and
Hanqing Zhao of Chaitin Security Research Lab
CVE-2019-8622: Samuel Groß of Google Project Zero
CVE-2019-8623: Samuel Groß of Google Project Zero
CVE-2019-8628: Wen Xu of SSLab at Georgia Tech and
Hanqing Zhao of Chaitin Security Research Lab

Wi-Fi
Available for: iPhone 5s and later, iPad Air and later, and iPod
touch 6th generation
Impact: A device may be passively tracked by its WiFi MAC address
Description: A user privacy issue was addressed by removing the
broadcast MAC address.
CVE-2019-8620: David Kreitschmann and Milan Stute of Secure Mobile
Networking Lab at Technische Universität Darmstadt

Additional recognition

Clang
We would like to acknowledge Brandon Azad of Google Project Zero for
their assistance.

CoreFoundation
We would like to acknowledge Vozzie and Rami and m4bln, Xiangqian
Zhang, Huiming Liu of Tencent's Xuanwu Lab for their assistance.

Kernel
We would like to acknowledge Brandon Azad of Google Project Zero and
an anonymous researcher for their assistance.

MediaLibrary
We would like to acknowledge Angel Ramirez and Min (Spark) Zheng,
Xiaolong Bai of Alibaba Inc. for their assistance.

MobileInstallation
We would like to acknowledge Yiğit Can YILMAZ (@yilmazcanyigit) for
their assistance.

Safari
We would like to acknowledge Ben Guild (@benguild) 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 "iOS 12.3".

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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