What is CVE-2021-30856?

CVE-2021-30856 is a critical-severity vulnerability in Apple macOS, classified under Incorrect Authorization. CVSS score: 9.1/10. Published 2021-08-24.

How severe is CVE-2021-30856?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Apple macOS

CVE-2021-30856

This issue was addressed by adding a new Remote Login option for opting into Full Disk Access for Secure Shell sessions. This issue is fixed in macOS Big Sur 11.3. A malicious unsandboxed app on a system with Remote Login enabled may bypass Privacy preferences.

Vulnerability class: Broken Access Control

EPSS: 0.009 (57.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Apple Macos — versions unspecified

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

product-security@apple.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-30856?: CVE-2021-30856 is a critical-severity vulnerability in Apple macOS, classified under Incorrect Authorization. CVSS score: 9.1/10. Published 2021-08-24.
How severe is CVE-2021-30856?: Critical severity. CVSS v3 base score is 9.1 out of 10.