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APPLE-SA-2019-10-29-4 watchOS 6.1

watchOS 6.1 is now available and addresses the following:

Accounts
Available for: Apple Watch Series 1 and later
Impact: A remote attacker may be able to leak memory
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2019-8787: Steffen Klee of Secure Mobile Networking Lab at
Technische Universität Darmstadt

App Store
Available for: Apple Watch Series 1 and later
Impact: A local attacker may be able to login to the account of a
previously logged in user without valid credentials.
Description: An authentication issue was addressed with improved
state management.
CVE-2019-8803: Kiyeon An, 차민규 (CHA Minkyu)

AppleFirmwareUpdateKext
Available for: Apple Watch Series 1 and later
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: A memory corruption vulnerability was addressed with
improved locking.
CVE-2019-8747: Mohamed Ghannam (@_simo36)

Audio
Available for: Apple Watch Series 1 and later
Impact: An application may be able to execute arbitrary code with
system privileges
Description: A memory corruption issue was addressed with improved
memory handling.
CVE-2019-8785: Ian Beer of Google Project Zero
CVE-2019-8797: 08Tc3wBB working with SSD Secure Disclosure

Contacts
Available for: Apple Watch Series 1 and later
Impact: Processing a maliciously contact may lead to UI spoofing
Description: An inconsistent user interface issue was addressed with
improved state management.
CVE-2017-7152: Oliver Paukstadt of Thinking Objects GmbH (to.com)

File System Events
Available for: Apple Watch Series 1 and later
Impact: An application may be able to execute arbitrary code with
system privileges
Description: A memory corruption issue was addressed with improved
memory handling.
CVE-2019-8798: ABC Research s.r.o. working with Trend Micro's Zero
Day Initiative

Kernel
Available for: Apple Watch Series 1 and later
Impact: An application may be able to read restricted memory
Description: A validation issue was addressed with improved input
sanitization.
CVE-2019-8794: 08Tc3wBB working with SSD Secure Disclosure

Kernel
Available for: Apple Watch Series 1 and later
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-2019-8786: an anonymous researcher

libxslt
Available for: Apple Watch Series 1 and later
Impact: Multiple issues in libxslt
Description: Multiple memory corruption issues were addressed with
improved input validation.
CVE-2019-8750: found by OSS-Fuzz

VoiceOver
Available for: Apple Watch Series 1 and later
Impact: A person with physical access to an iOS device may be able to
access contacts from the lock screen
Description: The issue was addressed by restricting options offered
on a locked device.
CVE-2019-8775: videosdebarraquito

WebKit
Available for: Apple Watch Series 1 and later
Impact: Processing maliciously crafted web content may lead to
universal cross site scripting
Description: A logic issue was addressed with improved state
management.
CVE-2019-8764: Sergei Glazunov of Google Project Zero

WebKit
Available for: Apple Watch Series 1 and later
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: Multiple memory corruption issues were addressed with
improved memory handling.
CVE-2019-8743: zhunki from Codesafe Team of Legendsec at Qi'anxin
Group
CVE-2019-8765: Samuel Groß of Google Project Zero
CVE-2019-8766: found by OSS-Fuzz
CVE-2019-8808: found by OSS-Fuzz
CVE-2019-8811: Soyeon Park of SSLab at Georgia Tech
CVE-2019-8812: an anonymous researcher
CVE-2019-8816: Soyeon Park of SSLab at Georgia Tech
CVE-2019-8820: Samuel Groß of Google Project Zero

Additional recognition

boringssl
We would like to acknowledge Nimrod Aviram of Tel Aviv University,
Robert Merget of Ruhr University Bochum, Juraj Somorovsky of Ruhr
University Bochum for their assistance.

CFNetwork
We would like to acknowledge Lily Chen of Google for their
assistance.

Kernel
We would like to acknowledge Jann Horn of Google Project Zero for
their assistance.

Safari
We would like to acknowledge Ron Summers for their assistance.

WebKit
We would like to acknowledge Zhiyi Zhang of Codesafe Team of
Legendsec at Qi'anxin Group 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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