About the security content of tvOS 11.4
This document describes the security content of tvOS 11.4.
About Apple security updates
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Apple security documents reference vulnerabilities by CVE-ID when possible.
tvOS 11.4
Bluetooth
Available for: Apple TV 4K
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
Crash Reporter
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 error handling.
CVE-2018-4206: Ian Beer of Google Project Zero
FontParser
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Processing a maliciously crafted font file may lead to arbitrary code execution
Description: A memory corruption issue was addressed with improved validation.
CVE-2018-4211: Proteas of Qihoo 360 Nirvan Team
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-2018-4249: Kevin Backhouse of Semmle Ltd.
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 buffer overflow was addressed with improved bounds checking.
CVE-2018-4241: Ian Beer of Google Project Zero
CVE-2018-4243: Ian Beer of Google Project Zero
libxpc
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: An application may be able to gain elevated privileges
Description: A logic issue was addressed with improved validation.
CVE-2018-4237: Samuel Groß (@5aelo) working with Trend Micro’s Zero Day Initiative
libxpc
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-2018-4404: Samuel Groß (@5aelo) working with Trend Micro’s Zero Day Initiative
LinkPresentation
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Processing a maliciously crafted text message may lead to UI spoofing
Description: A spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation.
CVE-2018-4187: Roman Mueller (@faker_), Zhiyang Zeng (@Wester) of Tencent Security Platform Department
Messages
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: A local user may be able to conduct impersonation attacks
Description: An injection issue was addressed with improved input validation.
CVE-2018-4235: Anurodh Pokharel of Salesforce.com
Messages
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Processing a maliciously crafted message may lead to a denial of service
Description: This issue was addressed with improved message validation.
CVE-2018-4240: Sriram (@Sri_Hxor) of PrimeFort Pvt. Ltd
Security
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: A local user may be able to read a persistent device identifier
Description: An authorization issue was addressed with improved state management.
CVE-2018-4224: Abraham Masri (@cheesecakeufo)
Security
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: A local user may be able to read a persistent account identifier
Description: An authorization issue was addressed with improved state management.
CVE-2018-4223: Abraham Masri (@cheesecakeufo)
UIKit
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 validation issue existed in the handling of text. This issue was addressed with improved validation of text.
CVE-2018-4198: Hunter Byrnes
WebKit
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Visiting a maliciously crafted website may lead to cookies being overwritten
Description: A permissions issue existed in the handling of web browser cookies. This issue was addressed with improved restrictions.
CVE-2018-4232: an anonymous researcher, Aymeric Chaib
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 race condition was addressed with improved locking.
CVE-2018-4192: Markus Gaasedelen, Amy Burnett, and Patrick Biernat of Ret2 Systems, Inc working with Trend Micro’s Zero Day Initiative
WebKit
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash
Description: A memory corruption issue was addressed with improved input validation.
CVE-2018-4214: found by OSS-Fuzz
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 memory handling.
CVE-2018-4204: found by OSS-Fuzz, Richard Zhu (fluorescence) working with Trend Micro's Zero Day Initiative
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 type confusion issue was addressed with improved memory handling.
CVE-2018-4246: found by OSS-Fuzz
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-2018-4200: Ivan Fratric of Google Project Zero
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-2018-4201: an anonymous researcher
CVE-2018-4218: natashenka of Google Project Zero
CVE-2018-4233: Samuel Groß (@5aelo) working with Trend Micro’s Zero Day Initiative
WebKit
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Visiting a malicious website may lead to address bar spoofing
Description: An inconsistent user interface issue was addressed with improved state management.
CVE-2018-4188: YoKo Kho (@YoKoAcc) of Mitra Integrasi Informatika, PT
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 buffer overflow issue was addressed with improved memory handling.
CVE-2018-4199: Alex Plaskett, Georgi Geshev, and Fabi Beterke of MWR Labs working with Trend Micro’s Zero Day Initiative
WebKit
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Visiting a maliciously crafted website may leak sensitive data
Description: Credentials were unexpectedly sent when fetching CSS mask images. This was addressed by using a CORS-enabled fetch method.
CVE-2018-4190: Jun Kokatsu (@shhnjk)
WebKit
Available for: Apple TV 4K and Apple TV (4th generation)
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: An out-of-bounds read was addressed with improved input validation.
CVE-2018-4222: natashenka of Google Project Zero
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