Zero-day vulnerability in Windows

Improper Privilege Management
CVE-2021-31955

The vulnerability was reported to Microsoft by Kaspersky Lab.

Vulnerability details

Advisory: SB2021060815 - OS Kernel information disclosure Microsoft Windows

Vulnerable component: Windows

CVE-ID: CVE-2021-31955

CVSSv3 score: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:H/RL:O/RC:C

CWE-ID: CWE-269 - Improper Privilege Management

Description:

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to improper privilege management. A local unprivileged user can read contents of Kernel memory from a user mode process.

Note, the vulnerability is being actively exploited in the wild.

External links:

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-31955