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Date: Tue, 23 Jan 2018 12:46:36 -0800
From: Apple Product Security <product-security-noreply@...ts.apple.com>
To: security-announce@...ts.apple.com
Subject: APPLE-SA-2018-1-23-4 tvOS 11.2.5

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

APPLE-SA-2018-1-23-4 tvOS 11.2.5

tvOS 11.2.5 is now available and addresses the following:

Audio
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Processing a maliciously crafted audio file may lead to
arbitrary code execution
Description: A memory corruption issue was addressed through improved
input validation.
CVE-2018-4094: Mingi Cho, MinSik Shin, Seoyoung Kim, Yeongho Lee and
Taekyoung Kwon of the Information Security Lab, Yonsei University

Core Bluetooth
Available for: Apple TV 4K and Apple TV (4th generation)
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-2018-4087: Rani Idan (@raniXCH) of Zimperium zLabs Team
CVE-2018-4095: Rani Idan (@raniXCH) of Zimperium zLabs Team

Kernel
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: An application may be able to read restricted memory
Description: A memory initialization issue was addressed through
improved memory handling.
CVE-2018-4090: Jann Horn of Google Project Zero

Kernel
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: An application may be able to read restricted memory
Description: A race condition was addressed through improved locking.
CVE-2018-4092: an anonymous researcher

Kernel
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: A malicious application may be able to execute arbitrary code
with kernel privileges
Description: A memory corruption issue was addressed through improved
input validation.
CVE-2018-4082: Russ Cox of Google

Kernel
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: An application may be able to read restricted memory
Description: A validation issue was addressed with improved input
sanitization.
CVE-2018-4093: Jann Horn of Google Project Zero

QuartzCore
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: A memory corruption issue existed in the processing of
web content. This issue was addressed through improved input
validation.
CVE-2018-4085: Ret2 Systems Inc. working with Trend Micro's Zero Day
Initiative

Security
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: A certificate may have name constraints applied incorrectly
Description: A certificate evaluation issue existed in the handling
of name constraints. This issue was addressed through improved trust
evaluation of certificates.
CVE-2018-4086: Ian Haken of Netflix

WebKit
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: Multiple memory corruption issues were addressed with
improved memory handling.
CVE-2018-4088: Jeonghoon Shin of Theori
CVE-2018-4089: Ivan Fratric of Google Project Zero
CVE-2018-4096: found by OSS-Fuzz

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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