Apple tvOS up to 12.1 Kernel memory corruption

Summaryinfo

A vulnerability was found in Apple tvOS up to 12.1. It has been declared as critical. Affected is an unknown function of the component Kernel. Executing a manipulation can lead to memory corruption. This vulnerability appears as CVE-2018-4447. The attack requires local access. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Apple tvOS up to 12.1 (Digital Media Player) and classified as critical. This vulnerability affects some unknown processing of the component Kernel. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A memory corruption issue was addressed with improved state management. This issue affected versions prior to iOS 12.1.1, macOS Mojave 10.14.2, tvOS 12.1.1, watchOS 5.1.2.

The bug was discovered 12/05/2018. The weakness was presented 12/05/2018 by Juwei Lin and Zhengyu Dong with TrendMicro as HT209342 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability was named CVE-2018-4447 since 01/02/2018. The attack needs to be approached locally. Required for exploitation is a single authentication. There are neither technical details nor an exploit publicly available. The advisory points out:

A memory corruption issue was addressed with improved state management.

The vulnerability scanner Nessus provides a plugin with the ID 119841 (macOS 10.14.x < 10.14.2 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks and running in the context c. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371369 (Apple macOS Mojave 10.14.2, Security Update 2018-003 High Sierra, Security Update 2018-006 Sierra Not Installed(HT209341)).

Upgrading to version 12.1.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (119841). See VDB-126171, VDB-127563, VDB-127564 and VDB-127567 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Digital Media Player

Vendor

• Apple

Name

• tvOS

Version

• 12.0
• 12.1

License

• commercial

Website

• Vendor: https://www.apple.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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