About the security content of watchOS 6.1.2

This document describes the security content of watchOS 6.1.2.

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.

watchOS 6.1.2

AnnotationKit

Available for: Apple Watch Series 1 and later

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-2020-3877: an anonymous researcher working with Trend Micro's Zero Day Initiative

Audio

Available for: Apple Watch Series 1 and later

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-2020-3857: Zhuo Liang of Qihoo 360 Vulcan Team

files

Available for: Apple Watch Series 1 and later

Impact: A malicious application may be able to overwrite arbitrary files

Description: An access issue was addressed with improved access restrictions.

CVE-2020-3855: Csaba Fitzl (@theevilbit)

ImageIO

Available for: Apple Watch Series 1 and later

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-2020-3826: Samuel Groß of Google Project Zero

CVE-2020-3870

CVE-2020-3878: Samuel Groß of Google Project Zero

CVE-2020-3880: Samuel Groß of Google Project Zero

IOAcceleratorFamily

Available for: Apple Watch Series 1 and later

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-2020-3837: Brandon Azad of Google Project Zero

IOUSBDeviceFamily

Available for: Apple Watch Series 1 and later

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-2019-8836: Xiaolong Bai and Min (Spark) Zheng of Alibaba Inc. and Luyi Xing of Indiana University Bloomington

Entry added June 22, 2020

Kernel

Available for: Apple Watch Series 1 and later

Impact: An application may be able to read restricted memory

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

CVE-2020-3875: Brandon Azad of Google Project Zero

Kernel

Available for: Apple Watch Series 1 and later

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

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

CVE-2020-3836: Brandon Azad of Google Project Zero

Kernel

Available for: Apple Watch Series 1 and later

Impact: An application may be able to read restricted memory

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

CVE-2020-3872: Haakon Garseg Mørk of Cognite and Cim Stordal of Cognite

Kernel

Available for: Apple Watch Series 1 and later

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-2020-3842: Ned Williamson working with Google Project Zero

Kernel

Available for: Apple Watch Series 1 and later

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-2020-3834: Xiaolong Bai and Min (Spark) Zheng of Alibaba Inc, Luyi Xing of Indiana University Bloomington

Kernel

Available for: Apple Watch Series 1 and later

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

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

CVE-2020-3860: Proteas of Qihoo 360 Nirvan Team

Kernel

Available for: Apple Watch Series 1 and later

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

Description: A type confusion issue was addressed with improved memory handling.

CVE-2020-3853: Brandon Azad of Google Project Zero

libxml2

Available for: Apple Watch Series 1 and later

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

Description: A buffer overflow was addressed with improved size validation.

CVE-2020-3846: Ranier Vilela

libxpc

Available for: Apple Watch Series 1 and later

Impact: Processing a maliciously crafted string may lead to heap corruption

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

CVE-2020-3856: Ian Beer of Google Project Zero

libxpc

Available for: Apple Watch Series 1 and later

Impact: An application may be able to gain elevated privileges

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

CVE-2020-3829: Ian Beer of Google Project Zero

wifivelocityd

Available for: Apple Watch Series 1 and later

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

Description: The issue was addressed with improved permissions logic.

CVE-2020-3838: Dayton Pidhirney (@_watbulb)

Additional recognition

IOSurface

We would like to acknowledge Liang Chen (@chenliang0817) for their assistance.