CVE-2021-30707: 
macOS vulnerability analysis and mitigation

CVE-2021-30707 is an audio processing vulnerability that affects multiple Apple operating systems including macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5, iOS 14.6 and iPadOS 14.6. The vulnerability was discovered by researcher hjy79425575 working with Trend Micro Zero Day Initiative and was patched in updates released on May 24, 2021. The issue involves the processing of maliciously crafted audio files that could lead to arbitrary code execution (Apple Support).

The vulnerability exists in the audio processing components of Apple's operating systems. It was caused by insufficient checks when processing audio files, which could allow malicious audio files to trigger arbitrary code execution. The issue was addressed by implementing improved checks in the audio processing logic. The vulnerability has a CVSS v3.1 base score of 8.8 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating it can be exploited remotely with low attack complexity but requires user interaction (NVD).

If successfully exploited, this vulnerability could allow an attacker to execute arbitrary code on the target system by getting a user to process a specially crafted audio file. This could potentially lead to unauthorized access, data theft, or system compromise (Apple Support).

Apple has addressed this vulnerability by implementing improved checks in the following OS versions: macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5, iOS 14.6 and iPadOS 14.6. Users should update their devices to these versions or later to protect against this vulnerability (Apple Support, Apple Support).