About the security content of watchOS 4.3

This document describes the security content of watchOS 4.3.

About Apple security updates

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

watchOS 4.3

Released 29 March 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 with improved memory handling.

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

Entry updated 16 November 2018

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 sanitisation.

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)

Kernel

Available for: All Apple Watch models

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

Description: An information disclosure issue existed in the transition of programme state. This issue was addressed with improved state handling.

CVE-2018-4185: Brandon Azad

Entry added 19 July 2018

libxml2

Available for: All Apple Watch models

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

Description: A use after free issue was addressed with improved memory management.

CVE-2017-15412: Nick Wellnhofer

Entry added 18 October 2018

LinkPresentation

Available for: All Apple Watch models

Impact: visiting a malicious website may lead to address bar spoofing

Description: an inconsistent user interface issue was addressed with improved state management.

CVE-2018-4390: Rayyan Bijoora (@Bijoora) of The City School, PAF Chapter

CVE-2018-4391: Rayyan Bijoora (@Bijoora) of The City School, PAF Chapter

Entry added 30 October 2018, updated 16 November 2018

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 with improved preferences cleanup.

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

Entry updated 16 November 2018

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 with 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 with 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: natashenka 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 with improved input validation.

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

WebKit

Available for: All Apple Watch models

Impact: unexpected interaction causes an ASSERT failure

Description: This issue was addressed with improved checks.

CVE-2018-4207: found by OSS-Fuzz

Entry added 2 May 2018

WebKit

Available for: All Apple Watch models

Impact: unexpected interaction causes an ASSERT failure

Description: This issue was addressed with improved checks.

CVE-2018-4208: found by OSS-Fuzz

Entry added 2 May 2018

WebKit

Available for: All Apple Watch models

Impact: unexpected interaction causes an ASSERT failure

Description: This issue was addressed with improved checks.

CVE-2018-4209: found by OSS-Fuzz

Entry added 2 May 2018

WebKit

Available for: All Apple Watch models

Impact: Unexpected interaction with indexing types caused a failure

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

CVE-2018-4210: found by OSS-Fuzz

Entry added 2 May 2018

WebKit

Available for: All Apple Watch models

Impact: unexpected interaction causes an ASSERT failure

Description: This issue was addressed with improved checks.

CVE-2018-4212: found by OSS-Fuzz

Entry added 2 May 2018

WebKit

Available for: All Apple Watch models

Impact: unexpected interaction causes an ASSERT failure

Description: This issue was addressed with improved checks.

CVE-2018-4213: found by OSS-Fuzz

Entry added 2 May 2018

WebKit

Available for: All Apple Watch models

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

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

CVE-2018-4145: found by OSS-Fuzz

Entry added 18 October 2018

Additional recognition

Mail

We would like to acknowledge Sabri Haddouche (@pwnsdx) from Wire Swiss GmbH for their assistance.

Entry added 21 June 2018

Security

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

Entry added 13 April 2018

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