Vulnerability DatabaseCVE-2021-30906

CVE-2021-30906:
macOS vulnerability analysis and mitigation

Overview

CVE-2021-30906 is a security vulnerability discovered in multiple Apple operating systems including iOS 15.1, iPadOS 15.1, macOS Monterey 12.0.1, tvOS 15.1, watchOS 8.1, and macOS Big Sur 11.6.1. The vulnerability was reported by Cees Elzinga and fixed in October 2021. It affects the iCloud component of these systems, where a local attacker could potentially elevate their privileges due to insufficient checks in the system (Apple Security).

Technical details

The vulnerability is classified with a CVSS v3.1 Base Score of 7.8 (HIGH) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. The issue was related to insufficient checks in the iCloud component, which could allow privilege escalation. Apple addressed this security flaw by implementing improved checks in the affected systems (NVD).

Impact

The vulnerability allows a local attacker to elevate their privileges on affected systems. This could potentially give attackers higher levels of access to system resources than intended, compromising the security of the affected device (Apple Security).

Mitigation and workarounds

Apple has released security updates to address this vulnerability across multiple operating systems. Users should update to iOS 15.1, iPadOS 15.1, macOS Monterey 12.0.1, tvOS 15.1, watchOS 8.1, or macOS Big Sur 11.6.1 depending on their device (Apple Security, Apple Security).