CVE-2021-23883: 
Trellix Endpoint Security Agent vulnerability analysis and mitigation

A Null Pointer Dereference vulnerability (CVE-2021-23883) was discovered in McAfee Endpoint Security (ENS) for Windows prior to version 10.7.0 February 2021 Update. The vulnerability allows a local administrator to cause Windows to crash via a specific system call which is not handled correctly. The severity of this issue varies by machine and had partial protection prior to this update (NVD, CVE).

The vulnerability is classified as a Null Pointer Dereference (CWE-476) issue. The vulnerability occurs when a specific system call is not handled correctly by the McAfee Endpoint Security software, leading to a potential system crash (NVD CNA Status).

When exploited, this vulnerability can cause Windows to crash, resulting in a denial of service condition. The impact varies depending on the specific machine configuration (CVE).

The vulnerability requires local administrator access to exploit, which somewhat limits its potential impact. The exploit involves making a specific system call that triggers the null pointer dereference (NVD).

The vulnerability was addressed in McAfee Endpoint Security (ENS) for Windows version 10.7.0 February 2021 Update. Users should upgrade to this version or later to mitigate the vulnerability (McAfee Security Bulletin).