About the security content of watchOS 4.3

This document describes the security content of watchOS 4.3.

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

watchOS 4.3

Released March 29, 2018

CoreFoundation

Available for: All Apple Watch models

Impact: An application may be able to gain elevated privileges

Description: A race condition was addressed with additional validation.

CVE-2018-4155: Samuel Groß (@5aelo)

CVE-2018-4158: Samuel Groß (@5aelo)

CoreText

Available for: All Apple Watch models

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

Description: A denial of service issue was addressed through improved memory handling.

CVE-2018-4142: Robin Leroy of Google Switzerland GmbH

File System Events

Available for: All Apple Watch models

Impact: An application may be able to gain elevated privileges

Description: A race condition was addressed with additional validation.

CVE-2018-4167: Samuel Groß (@5aelo)

Kernel

Available for: All Apple Watch models

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

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

CVE-2018-4150: an anonymous researcher

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-2018-4104: The UK's National Cyber Security Centre (NCSC)

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-2018-4143: derrek (@derrekr6)

NSURLSession

Available for: All Apple Watch models

Impact: An application may be able to gain elevated privileges

Description: A race condition was addressed with additional validation.

CVE-2018-4166: Samuel Groß (@5aelo)

Quick Look

Available for: All Apple Watch models

Impact: An application may be able to gain elevated privileges

Description: A race condition was addressed with additional validation.

CVE-2018-4157: Samuel Groß (@5aelo)

Security

Available for: All Apple Watch models

Impact: A malicious application may be able to elevate privileges

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

CVE-2018-4144: Abraham Masri (@cheesecakeufo)

System Preferences

Available for: All Apple Watch models

Impact: A configuration profile may incorrectly remain in effect after removal

Description: An issue existed in CFPreferences. This issue was addressed through improved preferences cleanup.

CVE-2018-4115: Johann Thalakada, Vladimir Zubkov, and Matt Vlasach of Wandera

WebKit

Available for: All Apple Watch models

Impact: Unexpected interaction with indexing types causing an ASSERT failure

Description: An array indexing issue existed in the handling of a function in javascript core. This issue was addressed through improved checks.

CVE-2018-4113: found by OSS-Fuzz

WebKit

Available for: All Apple Watch models

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

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

CVE-2018-4146: 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-2018-4114: found by OSS-Fuzz

CVE-2018-4121: Natalie Silvanovich of Google Project Zero

CVE-2018-4122: WanderingGlitch of Trend Micro’s Zero Day Initiative

CVE-2018-4125: WanderingGlitch of Trend Micro's Zero Day Initiative

CVE-2018-4129: likemeng of Baidu Security Lab working with Trend Micro's Zero Day Initiative

CVE-2018-4161: WanderingGlitch of Trend Micro's Zero Day Initiative

CVE-2018-4162: WanderingGlitch of Trend Micro's Zero Day Initiative

CVE-2018-4163: WanderingGlitch of Trend Micro's Zero Day Initiative

WebKit

Available for: All Apple Watch models

Impact: A malicious website may exfiltrate data cross-origin

Description: A cross-origin issue existed with the fetch API. This was addressed through improved input validation.

CVE-2018-4117: an anonymous researcher, an anonymous researcher

Additional recognition

Security

We would like to acknowledge Abraham Masri (@cheesecakeufo) for their assistance.

Entry added April 13, 2018

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