About the security content of tvOS 14.7

This document describes the security content of tvOS 14.7.

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Apple security documents reference vulnerabilities by CVE-ID when possible.

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tvOS 14.7

Released July 19, 2021

Analytics

Available for: Apple TV 4K and Apple TV HD

Impact: A local attacker may be able to access analytics data

Description: A logic issue was addressed with improved restrictions.

CVE-2021-30871: Denis Tokarev (@illusionofcha0s)

Entry added May 25, 2022

App Store

Available for: Apple TV 4K and Apple TV HD

Impact: A malicious application may be able to bypass certain Privacy preferences

Description: A permissions issue was addressed with improved validation.

CVE-2021-31006: Csaba Fitzl (@theevilbit) of Offensive Security

Entry added May 25, 2022

Audio

Available for: Apple TV 4K and Apple TV HD

Impact: A local attacker may be able to cause unexpected application termination or arbitrary code execution

Description: This issue was addressed with improved checks.

CVE-2021-30781: tr3e

AVEVideoEncoder

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 state management.

CVE-2021-30748: George Nosenko

Entry added January 19, 2022

CoreAudio

Available for: Apple TV 4K and Apple TV HD

Impact: Processing a maliciously crafted audio file may lead to arbitrary code execution

Description: A memory corruption issue was addressed with improved state management.

CVE-2021-30775: JunDong Xie of Ant Security Light-Year Lab

CoreAudio

Available for: Apple TV 4K and Apple TV HD

Impact: Playing a malicious audio file may lead to an unexpected application termination

Description: A logic issue was addressed with improved validation.

CVE-2021-30776: JunDong Xie of Ant Security Light-Year Lab

CoreText

Available for: Apple TV 4K and Apple TV HD

Impact: Processing a maliciously crafted font file may lead to arbitrary code execution

Description: An out-of-bounds read was addressed with improved input validation.

CVE-2021-30789: Mickey Jin (@patch1t) of Trend Micro, Sunglin of Knownsec 404 team

Crash Reporter

Available for: Apple TV 4K and Apple TV HD

Impact: A malicious application may be able to gain root privileges

Description: A logic issue was addressed with improved validation.

CVE-2021-30774: Yizhuo Wang of Group of Software Security In Progress (G.O.S.S.I.P) at Shanghai Jiao Tong University

CVMS

Available for: Apple TV 4K and Apple TV HD

Impact: A malicious application may be able to gain root privileges

Description: An out-of-bounds write issue was addressed with improved bounds checking.

CVE-2021-30780: Tim Michaud(@TimGMichaud) of Zoom Video Communications

dyld

Available for: Apple TV 4K and Apple TV HD

Impact: A sandboxed process may be able to circumvent sandbox restrictions

Description: A logic issue was addressed with improved validation.

CVE-2021-30768: Linus Henze (pinauten.de)

FontParser

Available for: Apple TV 4K and Apple TV HD

Impact: Processing a maliciously crafted font file may lead to arbitrary code execution

Description: An integer overflow was addressed through improved input validation.

CVE-2021-30760: Sunglin of Knownsec 404 team

FontParser

Available for: Apple TV 4K and Apple TV HD

Impact: Processing a maliciously crafted tiff file may lead to a denial-of-service or potentially disclose memory contents

Description: This issue was addressed with improved checks.

CVE-2021-30788: tr3e working with Trend Micro Zero Day Initiative

FontParser

Available for: Apple TV 4K and Apple TV HD

Impact: Processing a maliciously crafted font file may lead to arbitrary code execution

Description: A stack overflow was addressed with improved input validation.

CVE-2021-30759: hjy79425575 working with Trend Micro Zero Day Initiative

Identity Service

Available for: Apple TV 4K and Apple TV HD

Impact: A malicious application may be able to bypass code signing checks

Description: An issue in code signature validation was addressed with improved checks.

CVE-2021-30773: Linus Henze (pinauten.de)

Image Processing

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-2021-30802: Matthew Denton of Google Chrome Security

ImageIO

Available for: Apple TV 4K and Apple TV HD

Impact: Processing a maliciously crafted image may lead to arbitrary code execution

Description: This issue was addressed with improved checks.

CVE-2021-30779: Jzhu, Ye Zhang(@co0py_Cat) of Baidu Security

ImageIO

Available for: Apple TV 4K and Apple TV HD

Impact: Processing a maliciously crafted image may lead to arbitrary code execution

Description: A buffer overflow was addressed with improved bounds checking.

CVE-2021-30785: CFF of Topsec Alpha Team, Mickey Jin (@patch1t) of Trend Micro

Kernel

Available for: Apple TV 4K and Apple TV HD

Impact: A malicious attacker with arbitrary read and write capability may be able to bypass Pointer Authentication

Description: A logic issue was addressed with improved state management.

CVE-2021-30769: Linus Henze (pinauten.de)

Kernel

Available for: Apple TV 4K and Apple TV HD

Impact: An attacker that has already achieved kernel code execution may be able to bypass kernel memory mitigations

Description: A logic issue was addressed with improved validation.

CVE-2021-30770: Linus Henze (pinauten.de)

libxml2

Available for: Apple TV 4K and Apple TV HD

Impact: A remote attacker may be able to cause arbitrary code execution

Description: This issue was addressed with improved checks.

CVE-2021-3518

WebKit

Available for: Apple TV 4K and Apple TV HD

Impact: Processing maliciously crafted web content may lead to arbitrary code execution

Description: A type confusion issue was addressed with improved state handling.

CVE-2021-30758: Christoph Guttandin of Media Codings

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-2021-30795: Sergei Glazunov of Google Project Zero

WebKit

Available for: Apple TV 4K and Apple TV HD

Impact: Processing maliciously crafted web content may lead to code execution

Description: This issue was addressed with improved checks.

CVE-2021-30797: Ivan Fratric of Google Project Zero

Additional recognition

Assets

We would like to acknowledge Cees Elzinga for their assistance.

CoreText

We would like to acknowledge Mickey Jin (@patch1t) of Trend Micro for their assistance.

Power Management

We would like to acknowledge Pan ZhenPeng(@Peterpan0927) of Alibaba Security Pandora Lab, Csaba Fitzl (@theevilbit), and Lisandro Ubiedo (@_lubiedo) of Stratosphere Lab for their assistance.

Entry added June 7, 2023

Safari

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

Sandbox

We would like to acknowledge Csaba Fitzl (@theevilbit) of Offensive Security for their assistance.

sysdiagnose

We would like to acknowledge Carter Jones (linkedin.com/in/carterjones/) and Tim Michaud(@TimGMichaud) of Zoom Video Communications, Csaba Fitzl (@theevilbit) of Offensive Security, Pan ZhenPeng(@Peterpan0927) of Alibaba Security Pandora Lab, and Wojciech Reguła (@_r3ggi) of SecuRing for their assistance.

Entry added May 25, 2022, updated July 16, 2024

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