Use-after-free in macOS - CVE-2021-30832

Vulnerability identifier: #VU56741

CSH Severity: Low

CVSS v4.0: 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/E:U/U:Clear

CVE-ID: CVE-2021-30832

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

Vendor: Apple Inc.

Affected software:
macOS

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in the CVMServer daemon. A local user can run a specially crafted program to trigger a use-after-free error and execute arbitrary code with elevated privileges.

Install updates from vendor's website.

• https://support.apple.com/en-us/HT212804
• https://www.zerodayinitiative.com/advisories/ZDI-22-355/