About the security content of tvOS 12

This document describes the security content of tvOS 12.

About Apple security updates

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

tvOS 12

Released September 17, 2018

Auto Unlock

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: A malicious application may be able to access local users AppleIDs

Description: A validation issue existed in the entitlement verification. This issue was addressed with improved validation of the process entitlement.

CVE-2018-4321: Min (Spark) Zheng, Xiaolong Bai of Alibaba Inc.

Entry added September 24, 2018

Bluetooth

Available for: Apple TV (4th generation)

Impact: An attacker in a privileged network position may be able to intercept Bluetooth traffic

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

CVE-2018-5383: Lior Neumann and Eli Biham

CFNetwork

Available for: Apple TV 4K and 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-2018-4126: Bruno Keith (@bkth_) working with Trend Micro's Zero Day Initiative

Entry added October 30, 2018

CoreFoundation

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: A malicious application may be able to elevate privileges

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

CVE-2018-4412: The UK's National Cyber Security Centre (NCSC)

Entry added October 30, 2018

CoreFoundation

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: An application may be able to gain elevated privileges

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

CVE-2018-4414: The UK's National Cyber Security Centre (NCSC)

Entry added October 30, 2018

CoreText

Available for: Apple TV 4K and Apple TV (4th generation)

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

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

CVE-2018-4347: an anonymous researcher

Entry added October 30, 2018

Grand Central Dispatch

Available for: Apple TV 4K and 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-2018-4426: Brandon Azad

Entry added October 30, 2018

Heimdal

Available for: Apple TV 4K and 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-2018-4331: Brandon Azad

CVE-2018-4332: Brandon Azad

CVE-2018-4343: Brandon Azad

Entry added October 30, 2018

IOHIDFamily

Available for: Apple TV 4K and Apple TV (4th generation)

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

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

CVE-2018-4408: Ian Beer of Google Project Zero

Entry added October 30, 2018

IOKit

Available for: Apple TV 4K and Apple TV (4th generation)

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

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

CVE-2018-4341: Ian Beer of Google Project Zero

CVE-2018-4354: Ian Beer of Google Project Zero

Entry added October 30, 2018

IOKit

Available for: Apple TV 4K and 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 state management.

CVE-2018-4383: Apple

Entry added October 24, 2018

IOUserEthernet

Available for: Apple TV 4K and 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-2018-4401: Apple

Entry added October 30, 2018

iTunes Store

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: An attacker in a privileged network position may be able to spoof password prompts in the iTunes Store

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

CVE-2018-4305: Jerry Decime

Kernel

Available for: Apple TV 4K and Apple TV (4th generation)

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

Description: An access issue existed with privileged API calls. This issue was addressed with additional restrictions.

CVE-2018-4399: Fabiano Anemone (@anoane)

Entry added October 30, 2018

Kernel

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: An attacker in a privileged network position may be able to execute arbitrary code

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

CVE-2018-4407: Kevin Backhouse of Semmle Ltd.

Entry added October 30, 2018

Kernel

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: An application may be able to read restricted memory

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

CVE-2018-4363: Ian Beer of Google Project Zero

Kernel

Available for: Apple TV 4K and 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-2018-4336: Brandon Azad

CVE-2018-4337: Ian Beer of Google Project Zero

CVE-2018-4340: Mohamed Ghannam (@_simo36)

CVE-2018-4344: The UK's National Cyber Security Centre (NCSC)

CVE-2018-4425: cc working with Trend Micro's Zero Day Initiative, Juwei Lin (@panicaII) of Trend Micro working with Trend Micro's Zero Day Initiative

Entry added September 24, 2018, updated October 30, 2018

Safari

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: A local user may be able to discover websites a user has visited

Description: A consistency issue existed in the handling of application snapshots. The issue was addressed with improved handling of application snapshots.

CVE-2018-4313: an anonymous researcher, an anonymous researcher, an anonymous researcher, an anonymous researcher, an anonymous researcher, an anonymous researcher, an anonymous researcher, an anonymous researcher, an anonymous researcher, an anonymous researcher, an anonymous researcher, David Scott, Enes Mert Ulu of Abdullah Mürşide Özünenek Anadolu Lisesi - Ankara/Türkiye, Mehmet Ferit Daştan of Van Yüzüncü Yıl University, Metin Altug Karakaya of Kaliptus Medical Organization, Vinodh Swami of Western Governor's University (WGU)

Security

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: An attacker may be able to exploit weaknesses in the RC4 cryptographic algorithm

Description: This issue was addressed by removing RC4.

CVE-2016-1777: Pepi Zawodsky

Security

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: A local user may be able to cause a denial of service

Description: This issue was addressed with improved checks.

CVE-2018-4395: Patrick Wardle of Digita Security

Entry added October 30, 2018

Symptom Framework

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: An application may be able to read restricted memory

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

CVE-2018-4203: Bruno Keith (@bkth_) working with Trend Micro's Zero Day Initiative

Entry added October 30, 2018

Text

Available for: Apple TV 4K and Apple TV (4th generation)

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

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

CVE-2018-4304: jianan.huang (@Sevck)

Entry added October 30, 2018

WebKit

Available for: Apple TV 4K and Apple TV (4th generation)

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

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

CVE-2018-4316: crixer, Hanming Zhang (@4shitak4) of Qihoo 360 Vulcan Team

Entry added September 24, 2018

WebKit

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: A malicious website may exfiltrate image data cross-origin

Description: A cross-site scripting issue existed in Safari. This issue was addressed with improved URL validation.

CVE-2018-4345: an anonymous researcher

Entry added September 24, 2018

WebKit

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: Unexpected interaction causes an ASSERT failure

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

CVE-2018-4191: found by OSS-Fuzz

Entry added September 24, 2018

WebKit

Available for: Apple TV 4K and 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-2018-4299: Samuel Groβ (saelo) working with Trend Micro's Zero Day Initiative

CVE-2018-4359: Samuel Groß (@5aelo)

CVE-2018-4323: Ivan Fratric of Google Project Zero

CVE-2018-4358: @phoenhex team (@bkth_ @5aelo @_niklasb) working with Trend Micro's Zero Day Initiative

CVE-2018-4328: Ivan Fratric of Google Project Zero

Entry added September 24, 2018

WebKit

Available for: Apple TV 4K and Apple TV (4th generation)

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-2018-4197: Ivan Fratric of Google Project Zero

CVE-2018-4318: Ivan Fratric of Google Project Zero

CVE-2018-4306: Ivan Fratric of Google Project Zero

CVE-2018-4312: Ivan Fratric of Google Project Zero

CVE-2018-4314: Ivan Fratric of Google Project Zero

CVE-2018-4315: Ivan Fratric of Google Project Zero

CVE-2018-4317: Ivan Fratric of Google Project Zero

Entry added September 24, 2018

WebKit

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: A malicious website may be able to execute scripts in the context of another website

Description: A cross-site scripting issue existed in Safari. This issue was addressed with improved URL validation.

CVE-2018-4309: an anonymous researcher working with Trend Micro's Zero Day Initiative

Entry added September 24, 2018

WebKit

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: Unexpected interaction causes an ASSERT failure

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

CVE-2018-4361: found by OSS-Fuzz

Entry added September 24, 2018, updated October 24, 2018

WebKit

Available for: Apple TV 4K and 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-2018-4299: Samuel Groβ (saelo) working with Trend Micro's Zero Day Initiative

CVE-2018-4323: Ivan Fratric of Google Project Zero

CVE-2018-4328: Ivan Fratric of Google Project Zero

CVE-2018-4358: @phoenhex team (@bkth_ @5aelo @_niklasb) working with Trend Micro's Zero Day Initiative

CVE-2018-4359: Samuel Groß (@5aelo)

CVE-2018-4360: William Bowling (@wcbowling)

Entry added October 24, 2018

Additional recognition

Assets

We would like to acknowledge Brandon Azad for their assistance.

Core Data

We would like to acknowledge Andreas Kurtz (@aykay) of NESO Security Labs GmbH for their assistance.

Sandbox Profiles

We would like to acknowledge Tencent Keen Security Lab working with Trend Micro's Zero Day Initiative for their assistance.

SQLite

We would like to acknowledge Andreas Kurtz (@aykay) of NESO Security Labs GmbH for their assistance.

WebKit

We would like to acknowledge Cary Hartline, Hanming Zhang from 360 Vuclan team, and Zach Malone of CA Technologies for their assistance.

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