About the security content of watchOS 4.3.1

This document describes the security content of watchOS 4.3.1.

About Apple security updates

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

watchOS 4.3.1

Released May 29, 2018

Bluetooth

Not impacted: Apple Watch Series 3

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

CVE-2018-5383: Lior Neumann and Eli Biham

Entry added July 23, 2018

CoreGraphics

Available for: All Apple Watch models

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

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

CVE-2018-4194: Jihui Lu of Tencent KeenLab, Yu Zhou of Ant-financial Light-Year Security Lab

Entry added June 21, 2018

Crash Reporter

Available for: All Apple Watch models

Impact: An application may be able to gain elevated privileges

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

CVE-2018-4206: Ian Beer of Google Project Zero

FontParser

Available for: All Apple Watch models

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

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

CVE-2018-4211: Proteas of Qihoo 360 Nirvan Team

Kernel

Available for: All Apple Watch models

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

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

CVE-2018-4241: Ian Beer of Google Project Zero

CVE-2018-4243: Ian Beer of Google Project Zero

Kernel

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-2018-4249: Kevin Backhouse of Semmle Ltd.

libxpc

Available for: All Apple Watch models

Impact: An application may be able to gain elevated privileges

Description: A logic issue was addressed with improved validation.

CVE-2018-4237: Samuel Groß (@5aelo) working with Trend Micro’s Zero Day Initiative

libxpc

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-2018-4404: Samuel Groß (@5aelo) working with Trend Micro’s Zero Day Initiative

Entry added August 1, 2019

LinkPresentation

Available for: All Apple Watch models

Impact: Processing a maliciously crafted text message may lead to UI spoofing

Description: A spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation.

CVE-2018-4187: Roman Mueller (@faker_), Zhiyang Zeng (@Wester) of Tencent Security Platform Department

Entry added August 1, 2019

Messages

Available for: All Apple Watch models

Impact: A local user may be able to conduct impersonation attacks

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

CVE-2018-4235: Anurodh Pokharel of Salesforce.com

Messages

Available for: All Apple Watch models

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

Description: This issue was addressed with improved message validation.

CVE-2018-4240: Sriram (@Sri_Hxor) of PrimeFort Pvt. Ltd

Security

Available for: All Apple Watch models

Impact: A local user may be able to read a persistent device identifier

Description: An authorization issue was addressed with improved state management.

CVE-2018-4224: Abraham Masri (@cheesecakeufo)

Security

Available for: All Apple Watch models

Impact: A local user may be able to modify the state of the Keychain

Description: An authorization issue was addressed with improved state management.

CVE-2018-4225: Abraham Masri (@cheesecakeufo)

Security

Available for: All Apple Watch models

Impact: A local user may be able to read a persistent account identifier

Description: An authorization issue was addressed with improved state management.

CVE-2018-4223: Abraham Masri (@cheesecakeufo)

Security

Available for: All Apple Watch models

Impact: A local user may be able to view sensitive user information

Description: An authorization issue was addressed with improved state management.

CVE-2018-4226: Abraham Masri (@cheesecakeufo)

UIKit

Available for: All Apple Watch models

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

Description: A validation issue existed in the handling of text. This issue was addressed with improved validation of text.

CVE-2018-4198: Hunter Byrnes

WebKit

Available for: All Apple Watch models

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

Description: A race condition was addressed with improved locking.

CVE-2018-4192: Markus Gaasedelen, Amy Burnett, and Patrick Biernat of Ret2 Systems, Inc working with Trend Micro’s Zero Day Initiative

Entry updated October 8, 2019

WebKit

Available for: All Apple Watch models

Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash

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

CVE-2018-4214: found by OSS-Fuzz

WebKit

Available for: All Apple Watch models

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

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

CVE-2018-4246: found by OSS-Fuzz

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-2018-4201: an anonymous researcher

CVE-2018-4218: natashenka of Google Project Zero

CVE-2018-4233: Samuel Groß (@5aelo) working with Trend Micro’s Zero Day Initiative

WebKit

Available for: All Apple Watch models

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

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

CVE-2018-4222: natashenka of Google Project Zero

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Published Date: March 05, 2021