Advisory Details

March 30th, 2021

Apple macOS AudioCodecs MP4 File Parsing Signed to Unsigned Conversion Remote Code Execution Vulnerability

ZDI-21-375
ZDI-CAN-11448

CVE ID CVE-2020-27908
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 AudioCodecs module. Crafted data in an MP4 file can trigger a write outside the bounds of an allocated data structure. 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/en-us/HT211928
DISCLOSURE TIMELINE
  • 2020-09-16 - Vulnerability reported to vendor
  • 2021-03-30 - Coordinated public release of advisory
CREDIT Anonymous
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