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APPLE-SA-2019-12-10-5 tvOS 13.3

tvOS 13.3 is now available and addresses the following:

CFNetwork Proxies
Available for: Apple TV 4K and Apple TV HD
Impact: An application may be able to gain elevated privileges
Description: This issue was addressed with improved checks.
CVE-2019-8848: Zhuo Liang of Qihoo 360 Vulcan Team

FaceTime
Available for: Apple TV 4K and Apple TV HD
Impact: Processing malicious video via FaceTime may lead to arbitrary
code execution
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2019-8830: Natalie Silvanovich of Google Project Zero

IOUSBDeviceFamily
Available for: Apple TV 4K and Apple TV HD
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-2019-8836: Xiaolong Bai and Min (Spark) Zheng of Alibaba Inc. and
Luyi Xing of Indiana University Bloomington

Kernel
Available for: Apple TV 4K and Apple TV HD
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: A memory corruption issue was addressed by removing the
vulnerable code.
CVE-2019-8833: Ian Beer of Google Project Zero

Kernel
Available for: Apple TV 4K and Apple TV HD
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-2019-8828: Cim Stordal of Cognite
CVE-2019-8838: Dr Silvio Cesare of InfoSect

libexpat
Available for: Apple TV 4K and Apple TV HD
Impact: Parsing a maliciously crafted XML file may lead to disclosure
of user information
Description: This issue was addressed by updating to expat version
2.2.8.
CVE-2019-15903: Joonun Jang

Security
Available for: Apple TV 4K and Apple TV HD
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-2019-8832: Insu Yun of SSLab at Georgia Tech

WebKit
Available for: Apple TV 4K and Apple TV HD
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: Multiple memory corruption issues were addressed with
improved memory handling.
CVE-2019-8835: Anonymous working with Trend Micro's Zero Day
Initiative, Mike Zhang of Pangu Team
CVE-2019-8844: William Bowling (@wcbowling)

WebKit
Available for: Apple TV 4K and Apple TV HD
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: A use after free issue was addressed with improved
memory management.
CVE-2019-8846: Marcin Towalski of Cisco Talos

Additional recognition

Core Data
We would like to acknowledge Natalie Silvanovich of Google Project
Zero for their assistance.

Installation note:

Apple TV will periodically check for software updates. Alternatively,
you may manually check for software updates by selecting
"Settings -> System -> Software Update -> Update Software."

To check the current version of software, select
"Settings -> General -> About."

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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