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APPLE-SA-2018-7-9-2 watchOS 4.3.2

watchOS 4.3.2 is now available and addresses the following:

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.

Installation note:

Instructions on how to update your Apple Watch software are
available at https://support.apple.com/kb/HT204641

To check the version on your Apple Watch, open the Apple Watch app
on your iPhone and select "My Watch > General > About".

Alternatively, on your watch, select "My Watch > General > About".

Information will also be posted to the Apple Security Updates
web site: https://support.apple.com/kb/HT201222

This message is signed with Apple's Product Security PGP key,
and details are available at:
https://www.apple.com/support/security/pgp/
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