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Date: Tue, 26 Oct 2021 16:29:29 -0700
From: Apple Product Security via Fulldisclosure <fulldisclosure@...lists.org>
To: security-announce@...ts.apple.com
Subject: [FD] APPLE-SA-2021-10-26-7 tvOS 15.1

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Hash: SHA256

APPLE-SA-2021-10-26-7 tvOS 15.1

tvOS 15.1 addresses the following issues.
Information about the security content is also available at
https://support.apple.com/HT212876.

Audio
Available for: Apple TV 4K and Apple TV HD
Impact: A malicious application may be able to elevate privileges
Description: An integer overflow was addressed through improved input
validation.
CVE-2021-30907: Zweig of Kunlun Lab

ColorSync
Available for: Apple TV 4K and Apple TV HD
Impact: Processing a maliciously crafted image may lead to arbitrary
code execution
Description: A memory corruption issue existed in the processing of
ICC profiles. This issue was addressed with improved input
validation.
CVE-2021-30917: Alexandru-Vlad Niculae and Mateusz Jurczyk of Google
Project Zero

CoreAudio
Available for: Apple TV 4K and Apple TV HD
Impact: Processing a maliciously crafted file may disclose user
information
Description: An out-of-bounds read was addressed with improved bounds
checking.
CVE-2021-30905: Mickey Jin (@patch1t) of Trend Micro

CoreGraphics
Available for: Apple TV 4K and Apple TV HD
Impact: Processing a maliciously crafted PDF may lead to arbitrary
code execution
Description: An out-of-bounds write was addressed with improved input
validation.
CVE-2021-30919

FileProvider
Available for: Apple TV 4K and Apple TV HD
Impact: Unpacking a maliciously crafted archive may lead to arbitrary
code execution
Description: An input validation issue was addressed with improved
memory handling.
CVE-2021-30881: Simon Huang (@HuangShaomang) and pjf of IceSword Lab
of Qihoo 360

Game Center
Available for: Apple TV 4K and Apple TV HD
Impact: A malicious application may be able to access information
about a user's contacts
Description: A logic issue was addressed with improved restrictions.
CVE-2021-30895: Denis Tokarev

Game Center
Available for: Apple TV 4K and Apple TV HD
Impact: A malicious application may be able to read user's gameplay
data
Description: A logic issue was addressed with improved restrictions.
CVE-2021-30896: Denis Tokarev

iCloud
Available for: Apple TV 4K and Apple TV HD
Impact: A local attacker may be able to elevate their privileges
Description: This issue was addressed with improved checks.
CVE-2021-30906: Cees Elzinga

Image Processing
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
input validation.
CVE-2021-30894: Pan ZhenPeng (@Peterpan0927) of Alibaba Security
Pandora Lab

IOMobileFrameBuffer
Available for: Apple TV 4K and Apple TV HD
Impact: An application may be able to execute arbitrary code with
kernel privileges. Apple is aware of a report that this issue may
have been actively exploited.
Description: A memory corruption issue was addressed with improved
memory handling.
CVE-2021-30883: 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-2021-30886: @0xalsr

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-2021-30909: Zweig of Kunlun Lab

Model I/O
Available for: Apple TV 4K and Apple TV HD
Impact: Processing a maliciously crafted file may disclose user
information
Description: An out-of-bounds read was addressed with improved bounds
checking.
CVE-2021-30910: Mickey Jin (@patch1t) of Trend Micro

UIKit
Available for: Apple TV 4K and Apple TV HD
Impact: A person with physical access to an iOS device may be able to
determine characteristics of a user's password in a secure text entry
field
Description: A logic issue was addressed with improved state
management.
CVE-2021-30915: Kostas Angelopoulos

WebKit
Available for: Apple TV 4K and Apple TV HD
Impact: Processing maliciously crafted web content may lead to
unexpectedly unenforced Content Security Policy
Description: A logic issue was addressed with improved restrictions.
CVE-2021-30887: Narendra Bhati (@imnarendrabhati) of Suma Soft Pvt.
Ltd.

WebKit
Available for: Apple TV 4K and Apple TV HD
Impact: A malicious website using Content Security Policy reports may
be able to leak information via redirect behavior 
Description: An information leakage issue was addressed.
CVE-2021-30888: Prakash (@1lastBr3ath)

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.
CVE-2021-30889: Chijin Zhou of ShuiMuYuLin Ltd and Tsinghua
wingtecher lab

WebKit
Available for: Apple TV 4K and Apple TV HD
Impact: Processing maliciously crafted web content may lead to
universal cross site scripting
Description: A logic issue was addressed with improved state
management.
CVE-2021-30890: an anonymous researcher

Additional recognition

iCloud
We would like to acknowledge Ryan Pickren (ryanpickren.com) for their
assistance.

Mail
We would like to acknowledge Fabian Ising and Damian Poddebniak of
M√ľnster University of Applied Sciences for their assistance.

WebKit
We would like to acknowledge Ivan Fratric of Google Project Zero,
Pavel Gromadchuk, an anonymous researcher 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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