A vulnerability classified as critical was found in Apple Safari up to 16.1 (Web Browser). This vulnerability affects an unknown code block of the component WebKit. The manipulation with an unknown input leads to a type confusion vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was shared 12/13/2022 by Clément Lecigne as HT213537 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability was named CVE-2022-42856. Successful exploitation requires user interaction by the victim. Technical details are unknown but an exploit is available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/28/2024). 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 highly functional. This issue was added on 12/14/2022 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 01/04/2023:

Apply updates per vendor instructions.

Upgrading to version 16.2 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.

Productinfo

Type

• Web Browser

Vendor

• Apple

Name

• Safari

Version

• 16.0
• 16.1

License

• commercial

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