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APPLE-SA-2018-10-30-11 Additional information for
APPLE-SA-2018-9-24-6 tvOS 12

tvOS 12 addresses the following:

Auto Unlock
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: A malicious application may be able to access local users
AppleIDs
Description: A validation issue existed in the entitlement
verification. This issue was addressed with improved validation of
the process entitlement.
CVE-2018-4321: Min (Spark) Zheng, Xiaolong Bai of Alibaba Inc.

Bluetooth
Available for: Apple TV (4th generation)
Impact: An attacker in a privileged network position may be able to
intercept Bluetooth traffic
Description: An input validation issue existed in Bluetooth. This
issue was addressed with improved input validation.
CVE-2018-5383: Lior Neumann and Eli Biham

CFNetwork
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-2018-4126: Bruno Keith (@bkth_) working with Trend Micro's Zero
Day Initiative
Entry added October 30, 2018

CoreFoundation
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: A malicious application may be able to elevate privileges
Description: A memory corruption issue was addressed with improved
input validation.
CVE-2018-4412: The UK's National Cyber Security Centre (NCSC)
Entry added October 30, 2018

CoreFoundation
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: An application may be able to gain elevated privileges
Description: A memory corruption issue was addressed with improved
input validation.
CVE-2018-4414: The UK's National Cyber Security Centre (NCSC)
Entry added October 30, 2018

CoreText
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Processing a maliciously crafted text file may lead to
arbitrary code execution
Description: A use after free issue was addressed with improved
memory management.
CVE-2018-4347: an anonymous researcher
Entry added October 30, 2018

Grand Central Dispatch
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-2018-4426: Brandon Azad
Entry added October 30, 2018

Heimdal
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-2018-4331: Brandon Azad
CVE-2018-4332: Brandon Azad
CVE-2018-4343: Brandon Azad
Entry added October 30, 2018

IOHIDFamily
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 with improved
input validation
CVE-2018-4408: Ian Beer of Google Project Zero
Entry added October 30, 2018

IOKit
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: A malicious application may be able to break out of its
sandbox
Description: A memory corruption issue was addressed with improved
memory handling.
CVE-2018-4341: Ian Beer of Google Project Zero
CVE-2018-4354: Ian Beer of Google Project Zero
Entry added October 30, 2018

IOKit
Available for: Apple TV 4K and Apple TV (4th generation)
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-2018-4383: Apple
Entry added October 30, 2018

IOUserEthernet
Available for: Apple TV 4K and Apple TV (4th generation)
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-2018-4401: Apple
Entry added October 30, 2018

iTunes Store
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: An attacker in a privileged network position may be able to
spoof password prompts in the iTunes Store
Description: An input validation issue was addressed with improved
input validation.
CVE-2018-4305: Jerry Decime

Kernel
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: A malicious application may be able to leak sensitive user
information
Description: An access issue existed with privileged API calls. This
issue was addressed with additional restrictions.
CVE-2018-4399: Fabiano Anemone (@anoane)
Entry added October 30, 2018

Kernel
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: An application may be able to read restricted memory
Description: An input validation issue existed in the kernel. This
issue was addressed with improved input validation.
CVE-2018-4363: Ian Beer of Google Project Zero

Kernel
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: An attacker in a privileged network position may be able to
execute arbitrary code
Description: A memory corruption issue was addressed with improved
validation.
CVE-2018-4407: Kevin Backhouse of Semmle Ltd.
Entry added October 30, 2018

Kernel
Available for: Apple TV 4K and Apple TV (4th generation)
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-2018-4336: Brandon Azad
CVE-2018-4337: Ian Beer of Google Project Zero
CVE-2018-4340: Mohamed Ghannam (@_simo36)
CVE-2018-4344: The UK's National Cyber Security Centre (NCSC)
CVE-2018-4425: cc working with Trend Micro's Zero Day Initiative,
Juwei Lin (@panicaII) of Trend Micro working with Trend Micro's Zero
Day Initiative
Entry added October 30, 2018

Safari
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: A local user may be able to discover websites a user has
visited
Description: A consistency issue existed in the handling of
application snapshots. The issue was addressed with improved handling
of application snapshots.
CVE-2018-4313: 11 anonymous researchers, David Scott, Enes Mert
Ulu of Abdullah MA1/4rAide AzA1/4nenek Anadolu Lisesi -
Ankara/TA1/4rkiye, Mehmet Ferit DaAtan of Van YA1/4zA1/4ncA1/4 YA+-l
University, Metin Altug Karakaya of Kaliptus Medical Organization,
Vinodh Swami of Western Governor's University (WGU)

Security
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: A local user may be able to cause a denial of service
Description: This issue was addressed with improved checks.
CVE-2018-4395: Patrick Wardle of Digita Security
Entry added October 30, 2018

Security
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: An attacker may be able to exploit weaknesses in the RC4
cryptographic algorithm
Description: This issue was addressed by removing RC4.
CVE-2016-1777: Pepi Zawodsky

Symptom Framework
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: An application may be able to read restricted memory
Description: An out-of-bounds read was addressed with improved bounds
checking.
CVE-2018-4203: Bruno Keith (@bkth_) working with Trend Micro's Zero
Day Initiative
Entry added October 30, 2018

Text
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Processing a maliciously crafted text file may lead to a
denial of service
Description: A denial of service issue was addressed with improved
validation.
CVE-2018-4304: jianan.huang (@Sevck)
Entry added October 30, 2018

WebKit
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 was addressed with improved
state management.
CVE-2018-4316: crixer, Hanming Zhang (@4shitak4) of Qihoo 360 Vulcan
Team

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-2018-4299: Samuel GroI2 (saelo) working with Trend Micro's Zero
Day Initiative
CVE-2018-4323: Ivan Fratric of Google Project Zero
CVE-2018-4328: Ivan Fratric of Google Project Zero
CVE-2018-4358: @phoenhex team (@bkth_ @5aelo @_niklasb) working with
Trend Micro's Zero Day Initiative
CVE-2018-4359: Samuel GroA (@5aelo)
CVE-2018-4360: William Bowling (@wcbowling)
Entry added October 30, 2018

WebKit
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: A use after free issue was addressed with improved
memory management.
CVE-2018-4197: Ivan Fratric of Google Project Zero
CVE-2018-4306: Ivan Fratric of Google Project Zero
CVE-2018-4312: Ivan Fratric of Google Project Zero
CVE-2018-4314: Ivan Fratric of Google Project Zero
CVE-2018-4315: Ivan Fratric of Google Project Zero
CVE-2018-4317: Ivan Fratric of Google Project Zero
CVE-2018-4318: Ivan Fratric of Google Project Zero

WebKit
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: A malicious website may exfiltrate image data cross-origin
Description: A cross-site scripting issue existed in Safari. This
issue was addressed with improved URL validation.
CVE-2018-4345: an anonymous researcher

WebKit
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Unexpected interaction causes an ASSERT failure
Description: A memory corruption issue was addressed with improved
validation.
CVE-2018-4191: found by OSS-Fuzz

WebKit
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: A malicious website may be able to execute scripts in the
context of another website
Description: A cross-site scripting issue existed in Safari. This
issue was addressed with improved URL validation.
CVE-2018-4309: an anonymous researcher working with Trend Micro's
Zero Day Initiative

WebKit
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Unexpected interaction causes an ASSERT failure
Description: A memory consumption issue was addressed with improved
memory handling.
CVE-2018-4361: found by OSS-Fuzz

Additional recognition

Assets
We would like to acknowledge Brandon Azad for their assistance.

Core Data
We would like to acknowledge Andreas Kurtz (@aykay) of NESO Security
Labs GmbH for their assistance.

Kernel
We would like to acknowledge Brandon Azad for their assistance.

Sandbox Profiles
We would like to acknowledge Tencent Keen Security Lab working with
Trend Micro's Zero Day Initiative for their assistance.

SQLite
We would like to acknowledge Andreas Kurtz (@aykay) of NESO Security
Labs GmbH for their assistance.

WebKit
We would like to acknowledge Cary Hartline, Hanming Zhang from 360
Vuclan team, and Zach Malone of CA Technologies 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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