About the security content of watchOS 5.1.3

This document describes the security content of watchOS 5.1.3.

About Apple security updates

For our customers' protection, Apple doesn't disclose, discuss or confirm security issues until an investigation has taken place 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 5.1.3

AppleKeyStore

Available for: Apple Watch Series 1 and later

Impact: A sandboxed process may be able to circumvent sandbox restrictions

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

CVE-2019-6235: Brandon Azad

Core Media

Available for: Apple Watch Series 1 and later

Impact: a malicious application may be able to elevate privileges

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

CVE-2019-6202: Fluoroacetate working with Trend Micro's Zero Day Initiative

CoreAnimation

Available for: Apple Watch Series 1 and later

Impact: a malicious application may be able to read restricted memory

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

CVE-2019-6231: Zhuo Liang of Qihoo 360 Nirvan Team

CoreAnimation

Available for: Apple Watch Series 1 and later

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

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

CVE-2019-6230: Proteas, Shrek_wzw and Zhuo Liang of Qihoo 360 Nirvan Team

FaceTime

Available for: Apple Watch Series 1 and later

Impact: A remote attacker may be able to initiate a FaceTime call causing arbitrary code execution

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

CVE-2019-6224: natashenka of Google Project Zero

IOKit

Available for: Apple Watch Series 1 and later

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

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

CVE-2019-6214: Ian Beer of Google Project Zero

Kernel

Available for: Apple Watch Series 1 and later

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-2019-6210: Ned Williamson of Google

Kernel

Available for: Apple Watch Series 1 and later

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

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

CVE-2019-6213: Ian Beer 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 out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation.

CVE-2019-6209: Brandon Azad of Google Project Zero

Natural Language Processing

Available for: Apple Watch Series 1 and later

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

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

CVE-2019-6219: Authier Thomas

SQLite

Available for: Apple Watch Series 1 and later

Impact: A maliciously crafted SQL query may lead to arbitrary code execution

Description: Multiple memory corruption issues were addressed with improved input validation.

CVE-2018-20346: Tencent Blade Team

CVE-2018-20505: Tencent Blade Team

CVE-2018-20506: Tencent Blade Team

WebKit

Available for: Apple Watch Series 1 and later

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

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

CVE-2019-6227: Qixun Zhao of Qihoo 360 Vulcan Team

WebKit

Available for: Apple Watch Series 1 and later

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

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

CVE-2019-6216: Fluoroacetate working with Trend Micro's Zero Day Initiative

CVE-2019-6217: Fluoroacetate working with Trend Micro's Zero Day Initiative, Proteas, Shrek_wzw and Zhuo Liang of Qihoo 360 Nirvan Team

CVE-2019-6226: Apple

Additional recognition

mDNSResponder

We would like to acknowledge Fatemah Alharbi of University of California, Riverside (UCR) and Taibah University (TU), Jie Chang of LinkSure Network, Yuchen Zhou of Northeastern University, Feng Qian of University of Minnesota – Twin City, Zhiyun Qian of University of California, Riverside (UCR), and Nael Abu-Ghazaleh of University of California, Riverside (UCR) for their assistance.