CVE-2021-1808: 
macOS vulnerability analysis and mitigation

CVE-2021-1808 is a memory corruption vulnerability discovered in Apple's Audio component that was disclosed and patched in April 2021. The vulnerability affects multiple Apple operating systems including iOS 14.5, iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3, and Security Updates for macOS Catalina and Mojave. The vulnerability was discovered by JunDong Xie of Ant Security Light-Year Lab (Apple iOS).

The vulnerability is a memory corruption issue in the Audio component that allows applications to read restricted memory. Apple addressed this vulnerability by implementing improved validation mechanisms. The vulnerability has been assigned a CVSS v3.1 base score of 7.5 (HIGH) with vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N (NVD).

When exploited, this vulnerability allows a malicious application to read restricted memory, potentially exposing sensitive information. The vulnerability affects a wide range of Apple devices including iPhone 6s and later, iPad Pro (all models), iPad Air 2 and later, iPad 5th generation and later, iPad mini 4 and later, and iPod touch (7th generation) (Apple iOS).

Apple has released security updates to address this vulnerability across multiple operating systems: iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3, Security Update 2021-002 Catalina, and Security Update 2021-003 Mojave. Users are advised to update their devices to the latest available versions (Apple iOS).