About the security content of tvOS 14.6

This document describes the security content of tvOS 14.6.

About Apple security updates

For our customers' protection, Apple doesn't disclose, discuss or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.

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

For more information about security, see the Apple Product Security page.

tvOS 14.6

Audio

Available for: Apple TV 4K and Apple TV HD

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

Description: This issue was addressed with improved checks.

CVE-2021-30707: hjy79425575 (working with Trend Micro Zero Day Initiative)

Audio

Available for: Apple TV 4K and Apple TV HD

Impact: Parsing a maliciously crafted audio file may lead to the disclosure of user information

Description: This issue was addressed with improved checks.

CVE-2021-30685: Mickey Jin (@patch1t) of Trend Micro

CoreAudio

Available for: Apple TV 4K and Apple TV HD

Impact: Processing a maliciously crafted audio file may disclose restricted memory

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

CVE-2021-30686: Mickey Jin of Trend Micro

CoreText

Available for: Apple TV 4K and Apple TV HD

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

Description: Processing a maliciously crafted font may result in the disclosure of process memory.

CVE-2021-30753: Xingwei Lin of Ant Security Light-Year Lab

CVE-2021-30733: Sunglin from the Knownsec 404

Crash Reporter

Available for: Apple TV 4K and Apple TV HD

Impact: a malicious application may be able to modify protected parts of the file system

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

CVE-2021-30727: Cees Elzinga

CVMS

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-2021-30724: Mickey Jin (@patch1t) of Trend Micro

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 out-of-bounds write was addressed with improved input validation.

CVE-2021-30771: Mickey Jin (@patch1t) of Trend Micro, CFF of Topsec Alpha Team

FontParser

Available for: Apple TV 4K and Apple TV HD

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

Description: Processing a maliciously crafted font may result in the disclosure of process memory.

CVE-2021-30755: Xingwei Lin of Ant Security Light-Year Lab

Heimdal

Available for: Apple TV 4K and Apple TV HD

Impact: A local user may be able to leak sensitive user information

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

CVE-2021-30697: Gabe Kirkpatrick (@gabe_k)

Heimdal

Available for: Apple TV 4K and Apple TV HD

Impact: A malicious application may cause a denial of service or potentially disclose memory contents

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

CVE-2021-30710: Gabe Kirkpatrick (@gabe_k)

ImageIO

Available for: Apple TV 4K and Apple TV HD

Impact: Processing a maliciously crafted image may lead to the disclosure of user information

Description: an out-of-bounds read was addressed with improved bounds checking.

CVE-2021-30687: Hou JingYi (@hjy79425575) of Qihoo 360

ImageIO

Available for: Apple TV 4K and Apple TV HD

Impact: Processing a maliciously crafted image may lead to the disclosure of user information

Description: This issue was addressed with improved checks.

CVE-2021-30700: 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: This issue was addressed with improved checks.

CVE-2021-30701: Mickey Jin (@patch1t) of Trend Micro and Ye Zhang of Baidu Security

ImageIO

Available for: Apple TV 4K and Apple TV HD

Impact: Processing a maliciously crafted ASTC file may disclose memory contents

Description: This issue was addressed with improved checks.

CVE-2021-30705: Ye Zhang of Baidu Security

ImageIO

Available for: Apple TV 4K and Apple TV HD

Impact: This issue was addressed with improved checks

Description: Processing a maliciously crafted image may lead to disclosure of user information.

CVE-2021-30706: Anonymous (working with Trend Micro Zero Day Initiative), Jzhu (working with Trend Micro Zero Day Initiative)

Kernel

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 logic issue was addressed with improved validation.

CVE-2021-30740: Linus Henze (pinauten.de)

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 logic issue was addressed with improved state management.

CVE-2021-30704: An anonymous researcher

Kernel

Available for: Apple TV 4K and Apple TV HD

Impact: Processing a maliciously crafted message may lead to a denial of service

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

CVE-2021-30715: The UK's National Cyber Security Centre (NCSC)

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 buffer overflow was addressed with improved size validation.

CVE-2021-30736: Ian Beer of Google Project Zero

Kernel

Available for: Apple TV 4K and Apple TV HD

Impact: A double free issue was addressed with improved memory management

Description: An application may be able to execute arbitrary code with kernel privileges.

CVE-2021-30703: An anonymous researcher

LaunchServices

Available for: Apple TV 4K and Apple TV HD

Impact: a malicious application may be able to break out of its sandbox

Description: This issue was addressed with improved environment sanitisation.

CVE-2021-30677: Ron Waisberg (@epsilan)

Security

Available for: Apple TV 4K and Apple TV HD

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

Description: A memory corruption issue in the ASN.1 decoder was addressed by removing the vulnerable code.

CVE-2021-30737: xerub

WebKit

Available for: Apple TV 4K and Apple TV HD

Impact: processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

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

CVE-2021-30665: yangkang (@dnpushme)&zerokeeper&bianliang of 360 ATA

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 cross-origin issue with iframe elements was addressed with improved tracking of security origins.

CVE-2021-30744: Dan Hite of jsontop

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-2021-21779: Marcin Towalski of Cisco Talos

WebKit

Available for: Apple TV 4K and Apple TV HD

Impact: A malicious application may be able to leak sensitive user information

Description: A logic issue was addressed with improved restrictions.

CVE-2021-30682: An anonymous researcher and 1lastBr3ath

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-2021-30689: An anonymous researcher

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-2021-30749: An anonymous researcher and mipu94 of SEFCOM lab, ASU. (working with Trend Micro Zero Day Initiative)

CVE-2021-30734: Jack Dates of RET2 Systems, Inc. (@ret2systems), working with Trend Micro Zero Day Initiative

WebKit

Available for: Apple TV 4K and Apple TV HD

Impact: A malicious website may be able to access restricted ports on arbitrary servers

Description: A logic issue was addressed with improved restrictions.

CVE-2021-30720: David Schütz (@xdavidhu)

WebKit

Available for: Apple TV 4K and Apple TV HD

Impact: processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

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

CVE-2021-30663: an anonymous researcher

Additional recognition

ImageIO

We would like to acknowledge Jzhu (working with Trend Micro Zero Day Initiative) and an anonymous researcher for their assistance.

WebKit

We would like to acknowledge Chris Salls (@salls) of Makai Security for their assistance.