About the security content of watchOS 4.3.2

This document describes the security content of watchOS 4.3.2.

About Apple security updates

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

watchOS 4.3.2

Released July 9, 2018

CFNetwork

Available for: All Apple Watch models

Impact: Cookies may unexpectedly persist in Safari

Description: A cookie management issue was addressed with improved checks.

CVE-2018-4293: an anonymous researcher

Emoji

Available for: All Apple Watch models

Impact: Processing an emoji under certain configurations may lead to a denial of service

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

CVE-2018-4290: Patrick Wardle of Digita Security

Kernel

Available for: All Apple Watch models

Impact: A local user may be able to read kernel memory

Description: An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation.

CVE-2018-4282: Proteas of Qihoo 360 Nirvan Team

libxpc

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 memory handling.

CVE-2018-4280: Brandon Azad

libxpc

Available for: All Apple Watch models

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

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

CVE-2018-4248: Brandon Azad

LinkPresentation

Available for: All Apple Watch models

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

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

CVE-2018-4277: xisigr of Tencent's Xuanwu Lab (tencent.com)

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 memory handling.

CVE-2018-4270: 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-2018-4284: Found by OSS-Fuzz

WebKit

Available for: All Apple Watch models

Impact: A malicious website may be able to cause a denial of service

Description: A race condition was addressed with additional validation.

CVE-2018-4266: 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-2018-4262: Mateusz Krzywicki working with Trend Micro's Zero Day Initiative

CVE-2018-4264: found by OSS-Fuzz, Yu Zhou and Jundong Xie of Ant-financial Light-Year Security Lab

CVE-2018-4272: found by OSS-Fuzz

WebKit

Available for: All Apple Watch models

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

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

CVE-2018-4271: found by OSS-Fuzz

CVE-2018-4273: found by OSS-Fuzz

Additional recognition

Kernel

We would like to acknowledge juwei lin (@panicaII) of Trend Micro working with Trend Micro’s Zero Day Initiative for their assistance.

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