Advisory Details

August 22nd, 2024

Apple WebKit WebCodecs VideoFrame Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-24-1160
ZDI-CAN-23730

CVE ID CVE-2024-40789
CVSS SCORE 4.3, AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
AFFECTED VENDORS Apple
AFFECTED PRODUCTS WebKit
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Apple WebKit. 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 VideoFrame WebCodecs API. 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 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-us/120913
DISCLOSURE TIMELINE
  • 2024-05-01 - Vulnerability reported to vendor
  • 2024-08-22 - Coordinated public release of advisory
  • 2024-08-22 - Advisory Updated
CREDIT Seunghyun Lee (@0x10n) of KAIST Hacking Lab
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