CVE-2020-0981: 
vulnerability analysis and mitigation

CVE-2020-0981 is a security feature bypass vulnerability discovered in Windows that was disclosed on April 15, 2020. The vulnerability exists when Windows fails to properly handle token relationships, affecting Windows 10 version 1903 and higher (NVD).

The vulnerability stems from Windows' improper handling of token relationships, specifically related to token integrity levels. It has been assigned a CVSS v3.1 base score of 8.8 (HIGH) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. The vulnerability is classified under CWE-863 (Incorrect Authorization) (NVD).

When successfully exploited, this vulnerability could allow an application with a certain integrity level to execute code at a different integrity level, leading to a sandbox escape. This effectively enables privilege escalation and security feature bypass (Threatpost).

Microsoft has released a security update that addresses the vulnerability by correcting how Windows handles token relationships. Users are advised to apply the available patches through Windows Update (NVD).

The vulnerability was part of Microsoft's April 2020 Patch Tuesday release, which included fixes for 113 vulnerabilities. Security researchers classified this as an important security issue, particularly due to its potential for sandbox escape (Threatpost).