About the security content of tvOS 12.1

This document describes the security content of tvOS 12.1.

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Apple security documents reference vulnerabilities by CVE-ID when possible.

tvOS 12.1

Released October 30, 2018

CoreCrypto

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: An attacker may be able to exploit a weakness in the Miller-Rabin primality test to incorrectly identify prime numbers

Description: An issue existed in the method for determining prime numbers. This issue was addressed by using pseudorandom bases for testing of primes.

CVE-2018-4398: Martin Albrecht, Jake Massimo and Kenny Paterson of Royal Holloway, University of London, and Juraj Somorovsky of Ruhr University, Bochum

ICU

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: Processing a maliciously crafted string may lead to heap corruption

Description: A memory corruption issue was addressed with improved input validation.

CVE-2018-4394: Erik Verbruggen of The Qt Company

Entry updated November 16, 2018

IPSec

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: An application may be able to gain elevated privileges

Description: An out-of-bounds read was addressed with improved input validation.

CVE-2018-4371: Tim Michaud (@TimGMichaud) of Leviathan Security Group

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 by removing the vulnerable code.

CVE-2018-4420: Mohamed Ghannam (@_simo36)

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 with improved memory handling.

CVE-2018-4413: Juwei Lin (@panicaII) of TrendMicro Mobile Security 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-2018-4419: Mohamed Ghannam (@_simo36)

NetworkExtension

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: Connecting to a VPN server may leak DNS queries to a DNS proxy

Description: A logic issue was addressed with improved state management.

CVE-2018-4369: an anonymous researcher

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-2018-4372: HyungSeok Han, DongHyeon Oh, and Sang Kil Cha of KAIST Softsec Lab, Korea

CVE-2018-4382: lokihardt of Google Project Zero

CVE-2018-4386: lokihardt of Google Project Zero

CVE-2018-4392: zhunki of 360 ESG Codesafe Team

CVE-2018-4416: lokihardt of Google Project Zero

WebKit

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: A malicious website may be able to cause a denial of service

Description: A resource exhaustion issue was addressed with improved input validation.

CVE-2018-4409: Sabri Haddouche (@pwnsdx) of Wire Swiss GmbH

WebKit

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: Processing maliciously crafted web content may lead to code execution

Description: A memory corruption issue was addressed with improved validation.

CVE-2018-4378: HyungSeok Han, DongHyeon Oh, and Sang Kil Cha of KAIST Softsec Lab, Korea, zhunki of 360 ESG Codesafe Team

Entry updated November 16, 2018

WiFi

Available for: Apple TV 4K and Apple TV (4th generation)

Impact: An attacker in a privileged position may be able to perform a denial of service attack

Description: A denial of service issue was addressed with improved validation.

CVE-2018-4368: Milan Stute and Alex Mariotto of Secure Mobile Networking Lab at Technische Universität Darmstadt

Additional recognition

Certificate Signing

We would like to acknowledge Yiğit Can YILMAZ (@yilmazcanyigit) for their assistance.

Security

We would like to acknowledge Marinos Bernitsas of Parachute for their assistance.

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