Advisory Details

August 22nd, 2023

Apple macOS KTX Image Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-23-1159
ZDI-CAN-19367

CVE ID CVE-2023-27939
CVSS SCORE 3.3, AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
AFFECTED VENDORS Apple
AFFECTED PRODUCTS macOS
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Apple macOS. Interaction with the ImageIO framework is required to exploit this vulnerability but attack vectors may vary depending on the implementation.

The specific flaw exists within the ImageIO framework. Crafted data in a KTX image can trigger a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary 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/en-ca/HT213670
DISCLOSURE TIMELINE
  • 2022-12-16 - Vulnerability reported to vendor
  • 2023-08-22 - Coordinated public release of advisory
CREDIT jzhu
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