Advisory Details

August 4th, 2023

Apple Safari DFG Fixup Phase Use-After-Free Information Disclosure Vulnerability

ZDI-23-1018
ZDI-CAN-19555

CVE ID CVE-2023-28198
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 Safari
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Apple Safari. 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 DFG fixup phase. The issue results from the lack of validating the existence of an object prior to performing operations on the object. 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
  • 2022-12-29 - Vulnerability reported to vendor
  • 2023-08-04 - Coordinated public release of advisory
CREDIT hazbinhotel
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