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APPLE-SA-2019-10-29-9 Additional information
for APPLE-SA-2019-9-26-6 tvOS 13

tvOS 13 addresses the following:

AppleFirmwareUpdateKext
Available for: Apple TV 4K and Apple TV HD
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)
Entry added October 29, 2019

Audio
Available for: Apple TV 4K and Apple TV HD
Impact: Processing a maliciously crafted audio file may lead to
arbitrary code execution
Description: A memory corruption issue was addressed with improved
state management.
CVE-2019-8706: Yu Zhou of Ant-financial Light-Year Security Lab
Entry added October 29, 2019

CFNetwork
Available for: Apple TV 4K and Apple TV HD
Impact: Processing maliciously crafted web content may lead to a
cross site scripting attack
Description: This issue was addressed with improved checks.
CVE-2019-8753: Łukasz Pilorz of Standard Chartered GBS Poland
Entry added October 29, 2019

CoreAudio
Available for: Apple TV 4K and Apple TV HD
Impact: Processing a maliciously crafted movie may result in the
disclosure of process memory
Description: A memory corruption issue was addressed with improved
validation.
CVE-2019-8705: riusksk of VulWar Corp working with Trend Micro's Zero
Day Initiative
Entry added October 29, 2019

CoreCrypto
Available for: Apple TV 4K and Apple TV HD
Impact: Processing a large input may lead to a denial of service
Description: A denial of service issue was addressed with improved
input validation.
CVE-2019-8741: Nicky Mouha of NIST
Entry added October 29, 2019

Foundation
Available for: Apple TV 4K and Apple TV HD
Impact: A remote attacker may be able to cause unexpected application
termination or arbitrary code execution
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2019-8746: Natalie Silvanovich and Samuel Groß of Google Project
Zero
Entry added October 29, 2019

IOUSBDeviceFamily
Available for: Apple TV 4K and Apple TV HD
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-2019-8718: Joshua Hill and Sem Voigtländer
Entry added October 29, 2019

Kernel
Available for: Apple TV 4K and Apple TV HD
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: A memory corruption vulnerability was addressed with
improved locking.
CVE-2019-8740: Mohamed Ghannam (@_simo36)
Entry added October 29, 2019

Kernel
Available for: Apple TV 4K and Apple TV HD
Impact: A local app may be able to read a persistent account
identifier
Description: A validation issue was addressed with improved logic.
CVE-2019-8809: Apple
Entry added October 29, 2019

Kernel
Available for: Apple TV 4K and Apple TV HD
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-2019-8717: Jann Horn of Google Project Zero
Entry added October 29, 2019

Kernel
Available for: Apple TV 4K and Apple TV HD
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-2019-8712: Mohamed Ghannam (@_simo36)
Entry added October 29, 2019

Kernel
Available for: Apple TV 4K and Apple TV HD
Impact: A malicious application may be able to determine kernel
memory layout
Description: A memory corruption issue existed in the handling of
IPv6 packets. This issue was addressed with improved memory
management.
CVE-2019-8744: Zhuo Liang of Qihoo 360 Vulcan Team
Entry added October 29, 2019

Kernel
Available for: Apple TV 4K and Apple TV HD
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: A memory corruption issue was addressed with improved
state management.
CVE-2019-8709: derrek (@derrekr6)
[confirmed]derrek (@derrekr6)
Entry added October 29, 2019

Kernel
Available for: Apple TV 4K and Apple TV HD
Impact: A malicious application may be able to determine kernel
memory layout
Description: The issue was addressed with improved permissions logic.
CVE-2019-8780: Siguza
Entry added October 29, 2019

Keyboards
Available for: Apple TV 4K and Apple TV HD
Impact: A local user may be able to leak sensitive user information
Description: An authentication issue was addressed with improved
state management.
CVE-2019-8704: 王 邦 宇 (wAnyBug.Com) of SAINTSEC

libxml2
Available for: Apple TV 4K and Apple TV HD
Impact: Multiple issues in libxml2
Description: Multiple memory corruption issues were addressed with
improved input validation.
CVE-2019-8749: found by OSS-Fuzz
CVE-2019-8756: found by OSS-Fuzz
Entry added October 29, 2019

libxslt
Available for: Apple TV 4K and Apple TV HD
Impact: Multiple issues in libxslt
Description: Multiple memory corruption issues were addressed with
improved input validation.
CVE-2019-8750: found by OSS-Fuzz
Entry added October 29, 2019

mDNSResponder
Available for: Apple TV 4K and Apple TV HD
Impact: An attacker in physical proximity may be able to passively
observe device names in AWDL communications
Description: This issue was resolved by replacing device names with a
random identifier.
CVE-2019-8799: David Kreitschmann and Milan Stute of Secure Mobile
Networking Lab at Technische Universität Darmstadt
Entry added October 29, 2019

UIFoundation
Available for: Apple TV 4K and Apple TV HD
Impact: Processing a maliciously crafted text file may lead to
arbitrary code execution
Description: A buffer overflow was addressed with improved bounds
checking.
CVE-2019-8745: riusksk of VulWar Corp working with Trend Micro's Zero
Day Initiative
Entry added October 29, 2019

WebKit
Available for: Apple TV 4K and Apple TV HD
Impact: Processing maliciously crafted web content may lead to
universal cross site scripting
Description: A logic issue was addressed with improved state
management.
CVE-2019-8625: Sergei Glazunov of Google Project Zero
CVE-2019-8719: Sergei Glazunov of Google Project Zero
CVE-2019-8764: Sergei Glazunov of Google Project Zero
Entry added October 29, 2019

WebKit
Available for: Apple TV 4K and Apple TV HD
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: Multiple memory corruption issues were addressed with
improved memory handling.
CVE-2019-8707: an anonymous researcher working with Trend Micro's
Zero Day Initiative, cc working with Trend Micro Zero Day Initiative
CVE-2019-8710: found by OSS-Fuzz
CVE-2019-8726: Jihui Lu of Tencent KeenLab
CVE-2019-8728: Junho Jang of LINE Security Team and Hanul Choi of
ABLY Corporation
CVE-2019-8733: Sergei Glazunov of Google Project Zero
CVE-2019-8734: found by OSS-Fuzz
CVE-2019-8735: G. Geshev working with Trend Micro Zero Day Initiative
CVE-2019-8743: zhunki from Codesafe Team of Legendsec at Qi'anxin
Group
CVE-2019-8751: Dongzhuo Zhao working with ADLab of Venustech
CVE-2019-8752: Dongzhuo Zhao working with ADLab of Venustech
CVE-2019-8763: Sergei Glazunov of Google Project Zero
CVE-2019-8765: Samuel Groß of Google Project Zero
CVE-2019-8766: found by OSS-Fuzz
CVE-2019-8773: found by OSS-Fuzz

Additional recognition

Audio
We would like to acknowledge riusksk of VulWar Corp working with
Trend Micro's Zero Day Initiative for their assistance.
Entry added October 29, 2019

boringssl
We would like to acknowledge Nimrod Aviram of Tel Aviv University,
Robert Merget of Ruhr University Bochum, Juraj Somorovsky of Ruhr
University Bochum and Thijs Alkemade (@xnyhps) of Computest for their
assistance.

HomeKit
We would like to acknowledge Tian Zhang for their assistance.

Kernel
We would like to acknowledge Brandon Azad of Google Project Zero for
their assistance.

Keyboard
We would like to acknowledge an anonymous researcher for their
assistance.

mDNSResponder
We would like to acknowledge Gregor Lang of e.solutions GmbH for
their assistance.

Profiles
We would like to acknowledge Erik Johnson of Vernon Hills High School
and James Seeley (@Code4iOS) of Shriver Job Corps for their
assistance.

WebKit
We would like to acknowledge MinJeong Kim of Information Security
Lab, Chungnam National University, JaeCheol Ryou of the Information
Security Lab, Chungnam National University in South Korea, Yiğit Can
YILMAZ (@yilmazcanyigit), Zhihua Yao of DBAPPSecurity Zion Lab, an
anonymous researcher, and cc working with Trend Micro's Zero Day
Initiative for their assistance.

Installation note:

Apple TV will periodically check for software updates. Alternatively,
you may manually check for software updates by selecting
"Settings -> System -> Software Update -> Update Software."

To check the current version of software, select
"Settings -> 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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