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APPLE-SA-2022-03-14-3 tvOS 15.4

tvOS 15.4 addresses the following issues.
Information about the security content is also available at
https://support.apple.com/HT213186.

AppleAVD
Available for: Apple TV 4K and Apple TV HD
Impact: Processing a maliciously crafted image may lead to heap
corruption
Description: A memory corruption issue was addressed with improved
validation.
CVE-2022-22666: Marc Schoenefeld, Dr. rer. nat.

AVEVideoEncoder
Available for: Apple TV 4K and Apple TV HD
Impact: A malicious application may be able to execute arbitrary code
with kernel privileges
Description: A buffer overflow was addressed with improved bounds
checking.
CVE-2022-22634: an anonymous researcher

AVEVideoEncoder
Available for: Apple TV 4K and Apple TV HD
Impact: An application may be able to gain elevated privileges
Description: An out-of-bounds write issue was addressed with improved
bounds checking.
CVE-2022-22635: an anonymous researcher

AVEVideoEncoder
Available for: Apple TV 4K and Apple TV HD
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: An out-of-bounds write issue was addressed with improved
bounds checking.
CVE-2022-22636: an anonymous researcher

ImageIO
Available for: Apple TV 4K and Apple TV HD
Impact: Processing a maliciously crafted image may lead to arbitrary
code execution
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2022-22611: Xingyu Jin of Google

ImageIO
Available for: Apple TV 4K and Apple TV HD
Impact: Processing a maliciously crafted image may lead to heap
corruption
Description: A memory consumption issue was addressed with improved
memory handling.
CVE-2022-22612: Xingyu Jin of Google

IOGPUFamily
Available for: Apple TV 4K and Apple TV HD
Impact: An application may be able to gain elevated privileges
Description: A use after free issue was addressed with improved
memory management.
CVE-2022-22641: Mohamed Ghannam (@_simo36)

Kernel
Available for: Apple TV 4K and Apple TV HD
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: An out-of-bounds write issue was addressed with improved
bounds checking.
CVE-2022-22613: Alex, an anonymous researcher

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 use after free issue was addressed with improved
memory management.
CVE-2022-22614: an anonymous researcher
CVE-2022-22615: an anonymous researcher

Kernel
Available for: Apple TV 4K and Apple TV HD
Impact: A malicious application may be able to elevate privileges
Description: A logic issue was addressed with improved state
management.
CVE-2022-22632: Keegan Saunders

Kernel
Available for: Apple TV 4K and Apple TV HD
Impact: An attacker in a privileged position may be able to perform a
denial of service attack
Description: A null pointer dereference was addressed with improved
validation.
CVE-2022-22638: derrek (@derrekr6)

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
validation.
CVE-2022-22640: sqrtpwn

MediaRemote
Available for: Apple TV 4K and Apple TV HD
Impact: A malicious application may be able to identify what other
applications a user has installed
Description: An access issue was addressed with improved access
restrictions.
CVE-2022-22670: Brandon Azad

Preferences
Available for: Apple TV 4K and Apple TV HD
Impact: A malicious application may be able to read other
applications' settings
Description: The issue was addressed with additional permissions
checks.
CVE-2022-22609: Zhipeng Huo (@R3dF09) and Yuebin Sun (@yuebinsun2020)
of Tencent Security Xuanwu Lab (xlab.tencent.com)

Sandbox
Available for: Apple TV 4K and Apple TV HD
Impact: A malicious application may be able to bypass certain Privacy
preferences
Description: The issue was addressed with improved permissions logic.
CVE-2022-22600: Sudhakar Muthumani of Primefort Private Limited,
Khiem Tran

UIKit
Available for: Apple TV 4K and Apple TV HD
Impact: A person with physical access to an iOS device may be able to
see sensitive information via keyboard suggestions
Description: This issue was addressed with improved checks.
CVE-2022-22621: Joey Hewitt

WebKit
Available for: Apple TV 4K and Apple TV HD
Impact: Processing maliciously crafted web content may disclose
sensitive user information
Description: A cookie management issue was addressed with improved
state management.
WebKit Bugzilla: 232748
CVE-2022-22662: Prakash (@1lastBr3ath) of Threat Nix

WebKit
Available for: Apple TV 4K and Apple TV HD
Impact: Processing maliciously crafted web content may lead to code
execution
Description: A memory corruption issue was addressed with improved
state management.
WebKit Bugzilla: 232812
CVE-2022-22610: Quan Yin of Bigo Technology Live Client Team

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.
WebKit Bugzilla: 233172
CVE-2022-22624: Kirin (@Pwnrin) of Tencent Security Xuanwu Lab
WebKit Bugzilla: 234147
CVE-2022-22628: Kirin (@Pwnrin) of Tencent Security Xuanwu Lab

WebKit
Available for: Apple TV 4K and Apple TV HD
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: A buffer overflow issue was addressed with improved
memory handling.
WebKit Bugzilla: 234966
CVE-2022-22629: Jeonghoon Shin at Theori working with Trend Micro
Zero Day Initiative

WebKit
Available for: Apple TV 4K and Apple TV HD
Impact: A malicious website may cause unexpected cross-origin
behavior
Description: A logic issue was addressed with improved state
management.
WebKit Bugzilla: 235294
CVE-2022-22637: Tom McKee of Google

Additional recognition

Bluetooth
We would like to acknowledge an anonymous researcher for their
assistance.

Siri
We would like to acknowledge an anonymous researcher for their
assistance

syslog
We would like to acknowledge Yonghwi Jin (@jinmo123) of Theori for
their assistance.

UIKit
We would like to acknowledge Tim Shadel of Day Logger, Inc. for their
assistance.

WebKit
We would like to acknowledge Abdullah Md Shaleh for their assistance.

WebKit Storage
We would like to acknowledge Martin Bajanik of FingerprintJS for
their assistance.

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."
All information is also posted on the Apple Security Updates
web site: https://support.apple.com/en-us/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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