Apple macOS up to 13.0 WebKit type confusion

Summaryinfo

A vulnerability, which was classified as critical, has been found in Apple macOS. The impacted element is an unknown function of the component WebKit. The manipulation leads to type confusion. This vulnerability is listed as CVE-2022-42856. The attack may be initiated remotely. In addition, an exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple macOS (Operating System). It has been rated as critical. This issue affects an unknown functionality of the component WebKit. The manipulation with an unknown input leads to a type confusion vulnerability. Using CWE to declare the problem leads to CWE-843. The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. Impacted is confidentiality, integrity, and availability.

The weakness was presented 12/13/2022 by Clément Lecigne as HT213532 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. The identification of this vulnerability is CVE-2022-42856. It demands that the victim is doing some kind of user interaction. Technical details are unknown but an exploit is available. The advisory points out:

Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited against versions of iOS released before iOS 15.1.

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 239990 (TencentOS Server 3: webkit2gtk3 (TSSA-2023:0001)), which helps to determine the existence of the flaw in a target environment. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 12/14/2022 with a due date of 01/04/2023:

Apply updates per vendor instructions.

Upgrading to version 13.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A type confusion issue was addressed with improved state handling.

The vulnerability is also documented in the databases at Zero-Day.cz (740) and Tenable (239990). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Apple

Name

• macOS

Version

• 5.3
• 5.11
• 10.8.5
• 10.9.5
• 10.10
• 10.10.1
• 10.10.2
• 10.10.3
• 10.12
• 10.12.0
• 10.12.1
• 10.12.2
• 10.12.3
• 10.12.4
• 10.12.5
• 10.12.6
• 10.13
• 10.13.0
• 10.13.1
• 10.13.2
• 10.13.3
• 10.13.4
• 10.13.5
• 10.13.5 2018-003
• 10.13.6
• 10.14
• 10.14.1
• 10.14.2
• 10.14.4
• 10.14.5
• 10.14.6
• 10.15
• 10.15.0
• 10.15.1
• 10.15.2
• 10.15.3
• 10.15.4
• 10.15.5
• 10.15.6
• 10.15.7
• 11.0.1
• 11.1
• 11.2
• 11.2.1
• 11.2.3
• 11.3
• 11.3.1
• 11.4
• 11.5
• 11.6
• 11.6.6
• 11.7
• 11.7.3
• 11.7.5
• 11.7.9
• 12.0.1
• 12.1
• 12.2
• 12.2.1
• 12.3
• 12.3.1
• 12.4
• 12.5
• 12.5.1
• 12.6
• 12.6.2
• 12.6.3
• 12.6.4
• 12.6.7
• 12.6.8
• 12.7
• 12.7.1
• 12.7.5
• 13
• 13.0

License

• commercial

Website

• Vendor: https://www.apple.com/

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