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APPLE-SA-2018-3-29-2 watchOS 4.3

watchOS 4.3 is now available and addresses the following:

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 GroA (@5aelo)
CVE-2018-4158: Samuel GroA (@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 GroA (@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 GroA (@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 GroA (@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

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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