CVE-2020-3871: 
macOS vulnerability analysis and mitigation

CVE-2020-3871 is a kernel vulnerability discovered in macOS Catalina 10.15.2 and earlier versions. The vulnerability was disclosed and patched by Apple on January 28, 2020, as part of the macOS Catalina 10.15.3 security update. This memory corruption issue in the kernel could allow an application to execute arbitrary code with kernel privileges (Apple Security).

The vulnerability is characterized as a memory corruption issue in the macOS kernel. The technical root cause was related to improper memory handling, which was subsequently addressed with improved memory handling mechanisms. The vulnerability affects macOS Catalina versions prior to 10.15.3 (Apple Security).

If successfully exploited, this vulnerability would allow an application to execute arbitrary code with kernel privileges, effectively gaining the highest level of system access. This level of access could potentially allow complete system compromise (Apple Security).

The vulnerability requires local access and the ability to execute code on the target system. It was credited to Corellium, suggesting it was discovered during security research rather than found being actively exploited in the wild (Apple Security).

Apple addressed this vulnerability in macOS Catalina 10.15.3, released on January 28, 2020. Users should update to this version or later to protect against this vulnerability. The fix involves improved memory handling mechanisms implemented in the kernel (Apple Security).