About the security content of tvOS 11

This document describes the security content of tvOS 11.

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.

For more information about security, see the Apple Product Security page. You can encrypt communications with Apple using the Apple Product Security PGP Key.

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

tvOS 11

802.1X

Available for: Apple TV (4th generation)

Impact: An attacker may be able to exploit weaknesses in TLS 1.0

Description: A protocol security issue was addressed by enabling TLS 1.1 and TLS 1.2.

CVE-2017-13832: Doug Wussler of Florida State University

CFNetwork

Available for: Apple TV (4th generation)

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

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

CVE-2017-13829: Niklas Baumstark and Samuel Gro working with Trend Micro's Zero Day Initiative

CVE-2017-13833: Niklas Baumstark and Samuel Gro working with Trend Micro's Zero Day Initiative

CFNetwork Proxies

Available for: Apple TV (4th generation)

Impact: An attacker in a privileged network position may be able to cause a denial of service

Description: Multiple denial of service issues were addressed through improved memory handling.

CVE-2017-7083: Abhinav Bansal of Zscaler Inc.

CoreAudio

Available for: Apple TV (4th generation)

Impact: An application may be able to read restricted memory

Description: An out-of-bounds read was addressed by updating to Opus version 1.1.4.

CVE-2017-0381: V.E.O (@VYSEa) of Mobile Threat Research Team, Trend Micro

CoreText

Available for: Apple TV (4th generation)

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

Description: A memory consumption issue was addressed with improved memory handling.

CVE-2017-13825: Australian Cyber Security Centre – Australian Signals Directorate

file

Available for: Apple TV (4th generation)

Impact: Multiple issues in file

Description: Multiple issues were addressed by updating to version 5.31.

CVE-2017-13815: found by OSS-Fuzz

Fonts

Available for: Apple TV (4th generation)

Impact: Rendering untrusted text may lead to spoofing

Description: An inconsistent user interface issue was addressed with improved state management.

CVE-2017-13828: Leonard Grey and Robert Sesek of Google Chrome

HFS

Available for: Apple TV (4th generation)

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

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

CVE-2017-13830: Sergej Schumilo of Ruhr-University Bochum

ImageIO

Available for: Apple TV (4th generation)

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

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

CVE-2017-13814: Australian Cyber Security Centre – Australian Signals Directorate

ImageIO

Available for: Apple TV (4th generation)

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

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

CVE-2017-13831: Glen Carmichael

Kernel

Available for: Apple TV (4th generation)

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

Description: An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed through improved input validation.

CVE-2017-13817: Maxime Villard (m00nbsd)

Kernel

Available for: Apple TV (4th generation)

Impact: An application may be able to read restricted memory

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

CVE-2017-13818: The UK's National Cyber Security Centre (NCSC)

CVE-2017-13836: Vlad Tsyrklevich

CVE-2017-13841: Vlad Tsyrklevich

CVE-2017-13840: Vlad Tsyrklevich

CVE-2017-13842: Vlad Tsyrklevich

CVE-2017-13782: an anonymous researcher

Kernel

Available for: Apple TV (4th generation)

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-2017-13843: an anonymous researcher, an anonymous researcher

Kernel

Available for: Apple TV (4th generation)

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-2017-7114: Alex Plaskett of MWR InfoSecurity

Kernel

Available for: Apple TV (4th generation)

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

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

CVE-2017-13854: shrek_wzw of Qihoo 360 Nirvan Team

Kernel

Available for: Apple TV (4th generation)

Impact: Processing a malformed mach binary may lead to arbitrary code execution

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

CVE-2017-13834: Maxime Villard (m00nbsd)

Kernel

Available for: Apple TV (4th generation)

Impact: A malicious application may be able to learn information about the presence and operation of other applications on the device.

Description: An application was able to access network activity information maintained by the operating system unrestricted. This issue was addressed by reducing the information available to third party applications.

CVE-2017-13873: Xiaokuan Zhang and Yinqian Zhang of The Ohio State University, Xueqiang Wang and XiaoFeng Wang of Indiana University Bloomington, and Xiaolong Bai of Tsinghua University

libarchive

Available for: Apple TV (4th generation)

Impact: Unpacking a maliciously crafted archive may lead to arbitrary code execution

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

CVE-2017-13813: found by OSS-Fuzz

CVE-2017-13816: found by OSS-Fuzz

libarchive

Available for: Apple TV (4th generation)

Impact: Unpacking a maliciously crafted archive may lead to arbitrary code execution

Description: Multiple memory corruption issues existed in libarchive. These issues were addressed through improved input validation.

CVE-2017-13812: found by OSS-Fuzz

libc

Available for: Apple TV (4th generation)

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

Description: A resource exhaustion issue in glob() was addressed through an improved algorithm.

CVE-2017-7086: Russ Cox of Google

libc

Available for: Apple TV (4th generation)

Impact: An application may be able to cause a denial of service

Description: A memory consumption issue was addressed through improved memory handling.

CVE-2017-1000373

libexpat

Available for: Apple TV (4th generation)

Impact: Multiple issues in expat

Description: Multiple issues were addressed by updating to version 2.2.1

CVE-2016-9063

CVE-2017-9233

libxml2

Available for: Apple TV (4th generation)

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-2017-9049: Wei Lei and Liu Yang - Nanyang Technological University in Singapore

libxml2

Available for: Apple TV (4th generation)

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

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

CVE-2017-5130: an anonymous researcher

CVE-2017-7376: an anonymous researcher

libxml2

Available for: Apple TV (4th generation)

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

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

CVE-2017-9050: Mateusz Jurczyk (j00ru) of Google Project Zero

Quick Look

Available for: Apple TV (4th generation)

Impact: An application may be able to read restricted memory

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

CVE-2017-13822: Australian Cyber Security Centre – Australian Signals Directorate

Security

Available for: Apple TV (4th generation)

Impact: A revoked certificate may be trusted

Description: A certificate validation issue existed in the handling of revocation data. This issue was addressed through improved validation.

CVE-2017-7080: an anonymous researcher, Sven Driemecker of adesso mobile solutions gmbh, Rune Darrud (@theflyingcorpse) of Bærum kommune, an anonymous researcher

SQLite

Available for: Apple TV (4th generation)

Impact: Multiple issues in SQLite

Description: Multiple issues were addressed by updating to version 3.19.3.

CVE-2017-10989: found by OSS-Fuzz

CVE-2017-7128: found by OSS-Fuzz

CVE-2017-7129: found by OSS-Fuzz

CVE-2017-7130: found by OSS-Fuzz

SQLite

Available for: Apple TV (4th generation)

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

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

CVE-2017-7127: an anonymous researcher

WebKit

Available for: Apple TV (4th generation)

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

Description: A memory corruption issue was addressed through improved input validation.

CVE-2017-7081: Apple

WebKit

Available for: Apple TV (4th generation)

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

Description: Multiple memory corruption issues were addressed with improved memory handling.

CVE-2017-7087: Apple

CVE-2017-7091: Wei Yuan of Baidu Security Lab working with Trend Micro’s Zero Day Initiative

CVE-2017-7092: Qixun Zhao (@S0rryMybad) of Qihoo 360 Vulcan Team, Samuel Gro and Niklas Baumstark working with Trend Micro's Zero Day Initiative

CVE-2017-7093: Samuel Gro and Niklas Baumstark working with Trend Micro’s Zero Day Initiative

CVE-2017-7094: Tim Michaud (@TimGMichaud) of Leviathan Security Group

CVE-2017-7095: Wang Junjie, Wei Lei, and Liu Yang of Nanyang Technological University working with Trend Micro’s Zero Day Initiative

CVE-2017-7096: Wei Yuan of Baidu Security Lab

CVE-2017-7098: Felipe Freitas of Instituto Tecnológico de Aeronáutica

CVE-2017-7099: Apple

CVE-2017-7100: Masato Kinugawa and Mario Heiderich of Cure53

CVE-2017-7102: Wang Junjie, Wei Lei, and Liu Yang of Nanyang Technological University

CVE-2017-7104: likemeng of Baidu Secutity Lab

CVE-2017-7107: Wang Junjie, Wei Lei, and Liu Yang of Nanyang Technological University

CVE-2017-7111: likemeng of Baidu Security Lab (xlab.baidu.com) working with Trend Micro's Zero Day Initiative

CVE-2017-7117: lokihardt of Google Project Zero

CVE-2017-7120: chenqin (陈钦) of Ant-financial Light-Year Security Lab

WebKit

Available for: Apple TV (4th generation)

Impact: Cookies belonging to one origin may be sent to another origin

Description: A permissions issue existed in the handling of web browser cookies. This issue was addressed by no longer returning cookies for custom URL schemes.

CVE-2017-7090: Apple

WebKit

Available for: Apple TV (4th generation)

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

Description: Application Cache policy may be unexpectedly applied.

CVE-2017-7109: avlidienbrunn

Wi-Fi

Available for: Apple TV (4th generation)

Impact: An attacker within range may be able to execute arbitrary code on the Wi-Fi chip

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

CVE-2017-11120: Gal Beniamini of Google Project Zero

CVE-2017-11121: Gal Beniamini of Google Project Zero

Wi-Fi

Available for: Apple TV (4th generation)

Impact: Malicious code executing on the Wi-Fi chip may be able to execute arbitrary code with kernel privileges on the application processor

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

CVE-2017-7103: Gal Beniamini of Google Project Zero

CVE-2017-7105: Gal Beniamini of Google Project Zero

CVE-2017-7108: Gal Beniamini of Google Project Zero

CVE-2017-7110: Gal Beniamini of Google Project Zero

CVE-2017-7112: Gal Beniamini of Google Project Zero

Wi-Fi

Available for: Apple TV (4th generation)

Impact: Malicious code executing on the Wi-Fi chip may be able to execute arbitrary code with kernel privileges on the application processor

Description: Multiple race conditions were addressed through improved validation.

CVE-2017-7115: Gal Beniamini of Google Project Zero

Wi-Fi

Available for: Apple TV (4th generation)

Impact: Malicious code executing on the Wi-Fi chip may be able to read restricted kernel memory

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

CVE-2017-7116: Gal Beniamini of Google Project Zero

Wi-Fi

Available for: Apple TV (4th generation)

Impact: A attacker within range may be able to read restricted memory from the Wi-Fi chipset

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

CVE-2017-11122: Gal Beniamini of Google Project Zero

zlib

Available for: Apple TV (4th generation)

Impact: Multiple issues in zlib

Description: Multiple issues were addressed by updating to version 1.2.11.

CVE-2016-9840

CVE-2016-9841

CVE-2016-9842

CVE-2016-9843

Additional recognition

Security

We would like to acknowledge Abhinav Bansal of Zscaler, Inc. for their assistance.

WebKit

We would like to acknowledge Rayyan Bijoora (@Bijoora) of The City School, PAF Chapter for their assistance.