About the security content of tvOS 13.4.8

This document describes the security content of tvOS 13.4.8.

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 13.4.8

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 write issue was addressed with improved bounds checking.

CVE-2020-9884: Yu Zhou(@yuzhou6666) of 小鸡帮 working with Trend Micro Zero Day Initiative

CVE-2020-9889: Anonymous working with Trend Micro’s Zero Day Initiative, JunDong Xie and XingWei Lin of Ant-Financial Light-Year Security Lab

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-2020-9888: JunDong Xie and XingWei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9890: JunDong Xie and XingWei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9891: JunDong Xie and XingWei Lin of Ant-Financial Light-Year Security Lab

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 by removing the vulnerable code.

CVE-2020-9907: 08Tc3wBB working with ZecOps

CoreGraphics

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 issue was addressed with improved memory handling.

CVE-2020-9883: an anonymous researcher, Mickey Jin of Trend Micro

Crash Reporter

Available for: Apple TV 4K and Apple TV HD

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

Description: A memory corruption issue was addressed by removing the vulnerable code.

CVE-2020-9865: Zhuo Liang of Qihoo 360 Vulcan Team working with 360 BugCloud

Crash Reporter

Available for: Apple TV 4K and Apple TV HD

Impact: a local attacker may be able to elevate their privileges

Description: an issue existed within the path validation logic for symlinks. This issue was addressed with improved path sanitisation.

CVE-2020-9900: Cees Elzinga, Zhongcheng Li (CK01) from Zero-dayits Team of Legendsec at Qi'anxin Group

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 issue was addressed with improved bounds checking.

CVE-2020-9980: Xingwei Lin of Ant Security Light-Year Lab

GeoServices

Available for: Apple TV 4K and Apple TV HD

Impact: A malicious application may be able to read sensitive location information

Description: An authorisation issue was addressed with improved state management.

CVE-2020-9933: Min (Spark) Zheng and Xiaolong Bai of Alibaba Inc.

iAP

Available for: Apple TV 4K and Apple TV HD

Impact: An attacker in a privileged network position may be able to perform denial of service attack using malformed bluetooth packets

Description: An input validation issue existed in bluetooth. This issue was addressed with improved input validation.

CVE-2020-9914: Andy Davis of NCC Group

ImageIO

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 was addressed with improved input validation.

CVE-2020-27933: Xingwei Lin of Ant-Financial Light-Year Security Lab

ImageIO

Available for: Apple TV 4K and Apple TV HD

Impact: multiple buffer overflow issues existed in openEXR

Description: multiple issues in openEXR were addressed with improved checks.

CVE-2020-11758: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-11759: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-11760: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-11761: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-11762: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-11763: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-11764: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-11765: Xingwei Lin of Ant-Financial Light-Year Security Lab

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-2020-9871: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9872: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9874: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9879: Xingwei Lin of Ant-financial Light-Year Security Lab

CVE-2020-9936: Mickey Jin of Trend Micro

CVE-2020-9937: Xingwei Lin of Ant-financial Light-Year Security Lab

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 issue was addressed with improved memory handling.

CVE-2020-9919: Mickey Jin of Trend Micro

ImageIO

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-2020-9876: Mickey Jin of Trend Micro

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-2020-9873: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9938: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9984: 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 bounds checking.

CVE-2020-9877: Xingwei Lin of Ant-Financial Light-Year Security Lab

ImageIO

Available for: Apple TV 4K and Apple TV HD

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

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

CVE-2020-9875: Mickey Jin of Trend Micro

Kernel

Available for: Apple TV 4K and Apple TV HD

Impact: an attacker in a privileged network position may be able to inject into active connections within a VPN tunnel

Description: a routing issue was addressed with improved restrictions.

CVE-2019-14899: William J. Tolley, Beau Kujath and Jedidiah R. Crandall

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

CVE-2020-9909: Brandon Azad of Google Project Zero

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 state management.

CVE-2020-9904: 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 memory initialisation issue was addressed with improved memory handling.

CVE-2020-9863: Xinru Chi of Pangu Lab

Kernel

Available for: Apple TV 4K and Apple TV HD

Impact: A malicious application may be able to execute arbitrary code with system privileges

Description: Multiple memory corruption issues were addressed with improved state management.

CVE-2020-9892: Andy Nguyen of Google

Kernel

Available for: Apple TV 4K and Apple TV HD

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

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

CVE-2020-9902: Xinru Chi and Tielei Wang of Pangu Lab

Kernel

Available for: Apple TV 4K and Apple TV HD

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

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

CVE-2020-9905: Raz Mashat (@RazMashat) of ZecOps

libxml2

Available for: Apple TV 4K and Apple TV HD

Impact: Processing maliciously crafted XML may lead to an unexpected application termination or arbitrary code execution

Description: A use after free issue was addressed with improved memory management.

CVE-2020-9926: Found by OSS-Fuzz

Model I/O

Available for: Apple TV 4K and Apple TV HD

Impact: processing a maliciously crafted USD file may lead to unexpected application termination or arbitrary code execution

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

CVE-2020-9880: Holger Fuhrmannek of Deutsche Telekom Security

Model I/O

Available for: Apple TV 4K and Apple TV HD

Impact: Processing a maliciously crafted USD file may lead to unexpected application termination or arbitrary code execution

Description: A buffer overflow issue was addressed with improved memory handling.

CVE-2020-9878: Aleksandar Nikolic of Cisco Talos, Holger Fuhrmannek of Deutsche Telekom Security

CVE-2020-9940: Holger Fuhrmannek of Deutsche Telekom Security

Security

Available for: Apple TV 4K and Apple TV HD

Impact: An attacker may have been able to impersonate a trusted website using shared key material for an administrator-added certificate

Description: A certificate validation issue existed when processing administrator-added certificates. This issue was addressed with improved certificate validation.

CVE-2020-9868: Brian Wolff of Asana

sysdiagnose

Available for: Apple TV 4K and Apple TV HD

Impact: a local attacker may be able to elevate their privileges

Description: an issue existed within the path validation logic for symlinks. This issue was addressed with improved path sanitisation.

CVE-2020-9901: Tim Michaud (@TimGMichaud) of Leviathan, Zhongcheng Li (CK01) from Zero-dayits Team of Legendsec at Qi'anxin Group

WebKit

Available for: Apple TV 4K and Apple TV HD

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

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

CVE-2020-9894: 0011 working with Trend Micro Zero Day Initiative

WebKit

Available for: Apple TV 4K and Apple TV HD

Impact: Processing maliciously crafted web content may prevent Content Security Policy from being enforced

Description: An access issue existed in Content Security Policy. This issue was addressed with improved access restrictions.

CVE-2020-9915: Ayoub AIT ELMOKHTAR of Noon

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-2020-9925: an anonymous researcher

WebKit

Available for: Apple TV 4K and Apple TV HD

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

Description: A use after free issue was addressed with improved memory management.

CVE-2020-9893: 0011 working with Trend Micro Zero Day Initiative

CVE-2020-9895: Wen Xu of SSLab, Georgia Tech

WebKit

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: Multiple issues were addressed with improved logic.

CVE-2020-9910: Samuel Groß of Google Project Zero

WebKit Page Loading

Available for: Apple TV 4K and Apple TV HD

Impact: A malicious attacker may be able to conceal the destination of a URL

Description: A URL Unicode encoding issue was addressed with improved state management.

CVE-2020-9916: Rakesh Mane (@RakeshMane10)

WebKit Web Inspector

Available for: Apple TV 4K and Apple TV HD

Impact: Copying a URL from Web Inspector may lead to command injection

Description: A command injection issue existed in Web Inspector. This issue was addressed with improved escaping.

CVE-2020-9862: Ophir Lojkine (@lovasoa)

WebRTC

Available for: Apple TV 4K and Apple TV HD

Impact: an attacker in a privileged network position may be able to cause heap corruption via a crafted SCTP stream

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

CVE-2020-6514: natashenka of Google Project Zero

Wi-Fi

Available for: Apple TV 4K and Apple TV HD

Impact: A remote attacker may be able to cause unexpected system termination or corrupt kernel memory

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

CVE-2020-9918: Jianjun Dai of 360 Alpha Lab working with 360 BugCloud (bugcloud.360.cn)

Additional recognition

CoreFoundation

We would like to acknowledge Bobby Pelletier for their assistance.

ImageIO

We would like to acknowledge Xingwei Lin of Ant-Financial Light-Year Security Lab for their assistance.

Kernel

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