Apple tvOS up to 12.0 ICU memory corruption

Summaryinfo

A vulnerability, which was classified as critical, has been found in Apple tvOS up to 12.0. Impacted is an unknown function of the component ICU. The manipulation leads to memory corruption. This vulnerability is uniquely identified as CVE-2018-4394. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple tvOS up to 12.0 (Digital Media Player). It has been rated as critical. This issue affects an unknown functionality of the component ICU. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A memory corruption issue was addressed with improved input validation. This issue affected versions prior to iOS 12.1, macOS Mojave 10.14.1, tvOS 12.1, watchOS 5.1, iTunes 12.9.1.

The bug was discovered 10/30/2018. The weakness was disclosed 10/29/2018 as HT209194 as confirmed advisory (Website). The advisory is shared at support.apple.com. The identification of this vulnerability is CVE-2018-4394 since 01/02/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The advisory points out:

A memory corruption issue was addressed with improved input validation.

The vulnerability scanner Nessus provides a plugin with the ID 118573 (macOS and Mac OS X Multiple Vulnerabilities (Security Update 2018-005)), 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 l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371294 (Apple iTunes for Windows Prior to 12.9.1 Multiple Vulnerabilities (HT209197)).

Upgrading to version 12.1 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 (118573). The entries VDB-126195, VDB-126166, VDB-126170 and VDB-126172 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Digital Media Player

Vendor

• Apple

Name

• tvOS

Version

• 12.0

License

• commercial

Website

• Vendor: https://www.apple.com/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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