CVE-2021-30768: 
macOS vulnerability analysis and mitigation

CVE-2021-30768 is a security vulnerability discovered in Apple's operating systems that was fixed in iOS 14.7, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7, and Security Update 2021-004 Catalina, released in July 2021. The vulnerability affects the dynamic linker (dyld) component and was discovered by security researcher Linus Henze (Apple Security Updates).

The vulnerability is characterized as a logic issue in the dynamic linker (dyld) component that was addressed with improved validation. The issue received a CVSS v3.1 Base Score of 5.5 (MEDIUM) with a vector string of CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N (NVD).

When exploited, this vulnerability allows a sandboxed process to circumvent sandbox restrictions, potentially compromising the security boundaries established by Apple's sandbox protection mechanisms (Apple Security Updates).

Apple addressed this vulnerability by improving validation in the dyld component. The fix was released in iOS 14.7, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7, and Security Update 2021-004 Catalina. Users are advised to update their devices to these versions or later to protect against this vulnerability (Apple Security Updates).