The issue was addressed with improved checks. This issue is fixed in tvOS 18.1, iOS 18.1 and iPadOS 18.1, iOS 17.7.1 and iPadOS 17.7.1, macOS Ventura 13.7.1, macOS Sonoma 14.7.1, watchOS 11.1, visionOS 2.1. Processing a maliciously crafted font may result in the disclosure of process memory.
This vulnerability allows remote attackers to disclose sensitive information on affected installations of Apple macOS. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the parsing of ligature caret lists in fonts. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the current process.
