Advisory Details

June 25th, 2021

Apple macOS AudioCodecs LOAS File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-21-756
ZDI-CAN-13013

CVE ID CVE-2021-30686
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 USACBitstreamReader function in AudioCodecs. Crafted data in a LOAS file can trigger an overflow of a stack-based 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/HT212529
DISCLOSURE TIMELINE
  • 2021-02-03 - Vulnerability reported to vendor
  • 2021-06-25 - Coordinated public release of advisory
CREDIT Mickey Jin of Trend Micro Mobile Security Research Team
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