CVE-2021-30965: 
macOS vulnerability analysis and mitigation

CVE-2021-30965 is a security vulnerability discovered in Apple's macOS operating systems that affects the TCC (Transparency, Consent, and Control) component. The vulnerability was fixed in macOS Monterey 12.1, Security Update 2021-008 Catalina, and macOS Big Sur 11.6.2, released on December 13, 2021. The issue was identified by Csaba Fitzl (@theevilbit) of Offensive Security (Apple Support, Apple Support, Apple Support).

The vulnerability is characterized as a logic issue in the TCC component of macOS. The issue was addressed with improved state management. According to the National Vulnerability Database, it has a CVSS v3.1 Base Score of 6.5 (MEDIUM) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H (NVD).

When exploited, this vulnerability allows a malicious application to cause a denial of service to Endpoint Security clients. This could potentially disrupt security monitoring and protection mechanisms on affected systems (Apple Support, Apple Support, Apple Support).

Apple has released security updates to address this vulnerability in multiple macOS versions. Users should update to macOS Monterey 12.1, Security Update 2021-008 Catalina, or macOS Big Sur 11.6.2, depending on their operating system version (Apple Support, Apple Support, Apple Support).