CVE-2021-30798: 
macOS vulnerability analysis and mitigation

CVE-2021-30798 is a security vulnerability discovered in Apple's operating systems that affects iOS 14.7, macOS Big Sur 11.5, and watchOS 7.6. The vulnerability was identified as a logic issue in the TCC (Transparency, Consent, and Control) component that could allow a malicious application to bypass certain Privacy preferences. The issue was discovered by Mickey Jin of Trend Micro working with Trend Micro Zero Day Initiative and was fixed by Apple in July 2021 (Apple iOS, Apple macOS, Apple watchOS).

The vulnerability is classified as a logic issue in the TCC (Transparency, Consent, and Control) component of Apple's operating systems. The issue was addressed with improved state management. The vulnerability has a CVSS v3.1 Base Score of 7.5 (HIGH) with a vector string of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, indicating network accessibility, low attack complexity, no privileges required, and no user interaction needed (NVD).

The vulnerability allows a malicious application to bypass certain Privacy preferences in the affected Apple operating systems. This could potentially lead to unauthorized access to private user data and settings that are normally protected by the system's privacy controls (Apple iOS).

The vulnerability requires a malicious application to be present on the system to exploit the privacy bypass. The CVSS metrics indicate that the vulnerability is network accessible and requires low attack complexity to exploit, with no special privileges or user interaction needed (NVD).

Apple has addressed this vulnerability by implementing improved state management in the TCC component. Users should update their devices to iOS 14.7, macOS Big Sur 11.5, or watchOS 7.6 or later versions to receive the security fix (Apple iOS, Apple macOS, Apple watchOS).