CVE-2021-30958: 
macOS vulnerability analysis and mitigation

CVE-2021-30958 is a security vulnerability discovered in Apple's CoreAudio component that was disclosed and patched in December 2021. The vulnerability was identified as an out-of-bounds read issue that could be triggered by playing a malicious audio file, potentially leading to arbitrary code execution. This vulnerability affected multiple Apple operating systems including macOS Big Sur 11.6.2, tvOS 15.2, macOS Monterey 12.1, Security Update 2021-008 Catalina, iOS 15.2 and iPadOS 15.2, and watchOS 8.3 (Apple Support, NVD).

The vulnerability is classified as an out-of-bounds read vulnerability (CWE-125) in the CoreAudio component. The issue was addressed by Apple through improved input validation. The vulnerability has a CVSS v3.1 base score of 7.8 (HIGH), with the vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating local access is required and user interaction is needed (NVD).

If successfully exploited, this vulnerability could allow an attacker to execute arbitrary code on the target system through a maliciously crafted audio file. The high CVSS score indicates potential severe impacts on system confidentiality, integrity, and availability (NVD).

Apple addressed this vulnerability in multiple OS updates released in December 2021: macOS Big Sur 11.6.2, tvOS 15.2, macOS Monterey 12.1, Security Update 2021-008 Catalina, iOS 15.2 and iPadOS 15.2, and watchOS 8.3. Users should update their devices to these versions or later to protect against this vulnerability (Apple Support).