Apple macOS CoreText Font Ligature Caret List Parsing Out-Of-Bounds Read Information Disclosure Vulnerability
Vulnerability Details
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.
Additional Details
Apple has issued an update to correct this vulnerability. More details can be found at:
https://support.apple.com/121564
Disclosure Timeline
- 2024-08-22 - Vulnerability reported to vendor
- 2025-01-09 - Coordinated public release of advisory
- 2025-01-09 - Advisory Updated
Credit
Hossein Lotfi (@hosselot) of Trend Micro Zero Day Initiative
