Heap-based buffer overflow in macOS - CVE-2020-9856
Published: May 28, 2020 / Updated: October 2, 2020
Vulnerability identifier: #VU28309
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-9856
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the handling of Core Virtual Machine Service caches. A local user can pass specially crafted data to the applicatoin, trigger heap-based buffer overflow and execute arbitrary code on the target system with elevated privileges.
Affected software
macOS
How to mitigate CVE-2020-9856
Install updates from vendor's website.
macOS - update to 10.15.5 19F96