Advisory Details

February 16th, 2022

Apple macOS CoreGraphics PDF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-22-357
ZDI-CAN-14385

CVE ID CVE-2021-30919
CVSS SCORE 7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS Apple
AFFECTED PRODUCTS macOS
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code 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 processing of PDF files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability 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/HT212872
DISCLOSURE TIMELINE
  • 2021-07-13 - Vulnerability reported to vendor
  • 2022-02-16 - Coordinated public release of advisory
CREDIT Jzhu
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