Security Updates for Windows Defender (November 2021)

high Nessus Plugin ID 154991

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Synopsis

An antimalware application installed on the remote host is affected by a remote code execution vulnerability.

Description

The Malware Protection Engine version of Microsoft Windows Defender installed on the remote Windows host is equal or prior to 1.1.18700.3. It is, therefore, affected by a remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands.

Solution

Enable automatic updates to update the malware engine for the relevant antimalware applications. Refer to Knowledge Base Article 2510781 for information on how to verify that MMPE has been updated.

Plugin Details

Severity: High

ID: 154991

File Name: smb_nt_ms21_nov_win_defender.nasl

Version: 1.5

Type: local

Agent: windows

Family: Windows

Published: 11/9/2021

Updated: 11/24/2023

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 7.7

Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2021-42298

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.2

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:microsoft:windows, cpe:/a:microsoft:windows_defender

Required KB Items: installed_sw/Windows Defender

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/9/2021

Vulnerability Publication Date: 11/9/2021

Reference Information

CVE: CVE-2021-42298

IAVA: 2022-A-0005

Detections

Analytics