About the security content of tvOS 13.4.5

This document describes the security content of tvOS 13.4.5.

About Apple security updates

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

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tvOS 13.4.5

Released May 26, 2020

Accounts

Available for: Apple TV 4K and Apple TV HD

Impact: A remote attacker may be able to cause a denial of service

Description: A denial of service issue was addressed with improved input validation.

CVE-2020-9827: Jannik Lorenz of SEEMOO @ TU Darmstadt

AppleMobileFileIntegrity

Available for: Apple TV 4K and Apple TV HD

Impact: A malicious application could interact with system processes to access private information and perform privileged actions

Description: An entitlement parsing issue was addressed with improved parsing.

CVE-2020-9842: Linus Henze (pinauten.de)

Audio

Available for: Apple TV 4K and Apple TV HD

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

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

CVE-2020-9815: Yu Zhou (@yuzhou6666) working with Trend Micro Zero Day Initiative

Audio

Available for: Apple TV 4K and Apple TV HD

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

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

CVE-2020-9791: Yu Zhou (@yuzhou6666) working with Trend Micro Zero Day Initiative

CoreText

Available for: Apple TV 4K and Apple TV HD

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

Description: A validation issue was addressed with improved input sanitization.

CVE-2020-9829: Aaron Perris (@aaronp613), an anonymous researcher, an anonymous researcher, Carlos S Tech, Sam Menzies of Sam’s Lounge, Sufiyan Gouri of Lovely Professional University, India, Suleman Hasan Rathor of Arabic-Classroom.com

FontParser

Available for: Apple TV 4K and Apple TV HD

Impact: Opening a maliciously crafted PDF file may lead to an unexpected application termination or arbitrary code execution

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

CVE-2020-9816:  Peter Nguyen Vu Hoang of STAR Labs working with Trend Micro Zero Day Initiative

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-2020-3878: Samuel Groß of Google Project Zero

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 write issue was addressed with improved bounds checking.

CVE-2020-9789: Wenchao Li of VARAS@IIE

CVE-2020-9790: Xingwei Lin of Ant-financial Light-Year Security Lab

IPSec

Available for: Apple TV 4K and Apple TV HD

Impact: A remote attacker may be able to leak memory

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

CVE-2020-9837: Thijs Alkemade of Computest

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 memory corruption issue was addressed with improved state management.

CVE-2020-9821: Xinru Chi and Tielei Wang of Pangu Lab

Kernel

Available for: Apple TV 4K and Apple TV HD

Impact: A malicious application may be able to determine another application's memory layout

Description: An information disclosure issue was addressed by removing the vulnerable code.

CVE-2020-9797: an anonymous researcher

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: An integer overflow was addressed through improved input validation.

CVE-2020-9852: Tao Huang and Tielei Wang of Pangu Lab

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-2020-9795: Zhuo Liang of Qihoo 360 Vulcan Team

Kernel

Available for: Apple TV 4K and Apple TV HD

Impact: An application may be able to cause unexpected system termination or write kernel memory

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

CVE-2020-9808: Xinru Chi and Tielei Wang of Pangu Lab

Kernel

Available for: Apple TV 4K and Apple TV HD

Impact: A local user may be able to read kernel memory

Description: An information disclosure issue was addressed with improved state management.

CVE-2020-9811: Tielei Wang of Pangu Lab

CVE-2020-9812: derrek (@derrekr6)

Kerne

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 existed resulting in memory corruption. This was addressed with improved state management.

CVE-2020-9813: Xinru Chi of Pangu Lab

CVE-2020-9814: Xinru Chi and Tielei Wang of Pangu Lab

Kernel

Available for: Apple TV 4K and Apple TV HD

Impact: A malicious application may be able to determine kernel memory layout

Description: An information disclosure issue was addressed with improved state management.

CVE-2020-9809: Benjamin Randazzo (@____benjamin)

SQLite

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

CVE-2020-9794

System Preferences

Available for: Apple TV 4K and Apple TV HD

Impact: An application may be able to gain elevated privileges

Description: A race condition was addressed with improved state handling.

CVE-2020-9839: @jinmo123, @setuid0x0_, and @insu_yun_en of @SSLab_Gatech working with Trend Micro’s Zero Day Initiative

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 restrictions.

CVE-2020-9805: 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: A logic issue was addressed with improved restrictions.

CVE-2020-9802: Samuel Groß of Google Project Zero

WebKit

Available for: Apple TV 4K and Apple TV HD

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

Description: A logic issue was addressed with improved restrictions.

CVE-2020-9850: @jinmo123, @setuid0x0_, and @insu_yun_en of @SSLab_Gatech working with Trend Micro’s Zero Day Initiative

WebKit

Available for: Apple TV 4K and Apple TV HD

Impact: Processing maliciously crafted web content may lead to a cross site scripting attack

Description: An input validation issue was addressed with improved input validation.

CVE-2020-9843: Ryan Pickren (ryanpickren.com)

WebKit

Available for: Apple TV 4K and Apple TV HD

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

Description: A memory corruption issue was addressed with improved validation.

CVE-2020-9803: Wen Xu 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: A memory corruption issue was addressed with improved state management.

CVE-2020-9806: Wen Xu of SSLab at Georgia Tech

CVE-2020-9807: Wen Xu 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: A type confusion issue was addressed with improved memory handling.

CVE-2020-9800: Brendan Draper (@6r3nd4n) working with Trend Micro Zero Day Initiative

WebRTC

Available for: Apple TV 4K and Apple TV HD

Impact: Processing maliciously crafted web content may result in the disclosure of process memory

Description: An access issue was addressed with improved memory management.

CVE-2019-20503: Natalie Silvanovich of Google Project Zero

Additional recognition

CoreText

We would like to acknowledge Jiska Classen (@naehrdine) and Dennis Heinze (@ttdennis) of Secure Mobile Networking Lab for their assistance.

ImageIO

We would like to acknowledge Lei Sun for their assistance.

IOHIDFamily

We would like to acknowledge Andy Davis of NCC Group for their assistance.

Kernel

We would like to acknowledge Brandon Azad of Google Project Zero for their assistance.

Safari

We would like to acknowledge Luke Walker of Manchester Metropolitan University for their assistance.

WebKit

We would like to acknowledge Aidan Dunlap of UT Austin for their assistance.

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