About the security content of watchOS 4.2.2

This document describes the security content of watchOS 4.2.2.

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watchOS 4.2.2

Released January 23, 2018

Audio

Available for: All Apple Watch models

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

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

CVE-2018-4094: Mingi Cho, MinSik Shin, Seoyoung Kim, Yeongho Lee and Taekyoung Kwon of the Information Security Lab, Yonsei University

Core Bluetooth

Available for: All Apple Watch models

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-2018-4087: Rani Idan (@raniXCH) of Zimperium zLabs Team

CVE-2018-4095: Rani Idan (@raniXCH) of Zimperium zLabs Team

Graphics Driver

Available for: All Apple Watch models

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-2018-4109: Adam Donenfeld (@doadam) of the Zimperium zLabs Team

Entry added February 8, 2018

Kernel

Available for: All Apple Watch models

Impact: An application may be able to read restricted memory

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

CVE-2018-4090: Jann Horn of Google Project Zero

Kernel

Available for: All Apple Watch models

Impact: An application may be able to read restricted memory

Description: A race condition was addressed through improved memory handling.

CVE-2018-4092: Stefan Esser of Antid0te UG

Entry updated February 8, 2018

Kernel

Available for: All Apple Watch models

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

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

CVE-2018-4082: Russ Cox of Google

Kernel

Available for: All Apple Watch models

Impact: An application may be able to read restricted memory

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

CVE-2018-4093: Jann Horn of Google Project Zero

LinkPresentation

Available for: All Apple Watch models

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

Description: A resource exhaustion issue was addressed through improved input validation.

CVE-2018-4100: Abraham Masri (@cheesecakeufo)

QuartzCore

Available for: All Apple Watch models

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

Description: A memory corruption issue existed in the processing of web content. This issue was addressed through improved input validation.

CVE-2018-4085: Ret2 Systems Inc. working with Trend Micro's Zero Day Initiative

Security

Available for: All Apple Watch models

Impact: A certificate may have name constraints applied incorrectly

Description: A certificate evaluation issue existed in the handling of name constraints. This issue was addressed through improved trust evaluation of certificates.

CVE-2018-4086: Ian Haken of Netflix

WebKit

Available for: All Apple Watch models

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

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

CVE-2018-4088: Jeonghoon Shin of Theori

CVE-2018-4096: found by OSS-Fuzz

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