Security Update for Windows Defender (July 2021)

high Nessus Plugin ID 151647

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Synopsis

An antimalware application installed on the remote host is affected by multiple vulnerabilities.

Description

The Malware Protection Engine version of Microsoft Windows Defender installed on the remote Windows host is prior to 1.1.18242.0. It is, therefore, affected by multiple remote code execution vulnerabilities. An attacker can exploit one of these vulnerabilities to bypass authentication and execute unauthorized arbitrary commands.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Enable automatic updates to update the malware engine for the relevant antimalware applications.

Plugin Details

Severity: High

ID: 151647

File Name: smb_nt_ms21_july_win_defender.nasl

Version: 1.4

Type: local

Agent: windows

Family: Windows

Published: 7/15/2021

Updated: 12/8/2023

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-2021-34522

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: 7/13/2021

Vulnerability Publication Date: 7/13/2021

Reference Information

CVE: CVE-2021-34464, CVE-2021-34522

Detections

Analytics