Stack-based buffer overflow in macOS - CVE-2021-30686
Published: May 24, 2021 / Updated: June 25, 2021
Vulnerability identifier: #VU53450
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-30686
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a boundary condition within the
USACBitstreamReader function in AudioCodecs. A remote attacker can
create a specially crafted LOAS file, trick the victim into opening it,
trigger a stack-based buffer overflow and execute arbitrary code on the system.
Affected software
macOS
watchOS
iPadOS
tvOS
Apple iOS
watchOS
iPadOS
tvOS
Apple iOS
How to mitigate CVE-2021-30686
Install updates from vendor's website.
macOS - addressed in versions 11.4 20F71, 10.15.7 19H1217
watchOS - update to 7.5 18T567
iPadOS - update to 14.6 18F72
tvOS - update to 14.6 18L569
Apple iOS - update to 14.6 18F72
watchOS - update to 7.5 18T567
iPadOS - update to 14.6 18F72
tvOS - update to 14.6 18L569
Apple iOS - update to 14.6 18F72