CVE intelligence and bounded remediation

CVE-2021-30892 — An inherited permissions issue was addressed with additional restrictions

Medium CVSS 5.5

An inherited permissions issue was addressed with additional restrictions. This issue is fixed in macOS Monterey 12.0.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. A malicious application may be able to modify protected parts of the file system.

Severity
Medium
CVSS
5.5 (3.1)
Published
2021-08-24
CISA KEV
Not currently listed
Ecosystem
apple/platform
Weaknesses
CWE-732

Affected products

  • apple / mac_os_x
  • apple / mac_os_x / 10.15.7
  • apple / macos
  • apple / macos / 12.0

Showing 4 representative product identities from 12 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Privilege escalation and unsafe privilege management

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Check exposure

  • Map service accounts, operating-system identities, roles, capabilities, impersonation, set-user transitions, and administrative helper paths.
  • Determine whether untrusted users or lower-privilege processes can reach the affected transition or modify inputs it trusts.
  • Review file, socket, registry, device, job, container, and cloud-role permissions used before and after privilege changes.

Remediate safely

  • Apply the supported fix and redesign privileged operations as a minimal, authenticated, allowlisted interface.
  • Drop privileges before processing untrusted input, verify the drop succeeds, and remove unnecessary roles, capabilities, and write permissions.
  • Validate ownership and permissions at time of use and add explicit lower-to-higher privilege boundary tests.

Authoritative sources

Complete CVE record and remediation plan

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