Microsoft App Installer Security Updates (December 2021)

high Nessus Plugin ID 159064

Synopsis

The app installer installation on the remote host is missing a security update.

Description

The app installer installation on the remote host is missing a security update. It is, therefore, affected by a session spoofing vulnerability. An attacker can exploit this if the user opens a specially crafted attachment. This will allow the attacker to perform actions with the privileges of the user.

Solution

Microsoft has released an update to address this issue.

See Also

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-43890

https://www.microsoft.com/en-us/p/app-installer/9nblggh4nns1

Plugin Details

Severity: High

ID: 159064

File Name: smb_nt_ms21_dec_app_installer.nasl

Version: 1.4

Type: local

Agent: windows

Published: 3/18/2022

Updated: 8/3/2022

Risk Information

VPR

Risk Factor: Critical

Score: 9.7

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 5.2

Vector: AV:N/AC:M/Au:S/C:P/I:P/A:P

Temporal Vector: E:H/RL:OF/RC:C

CVSS Score Source: CVE-2021-43890

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.8

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

Temporal Vector: E:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:microsoft:app_installer, cpe:/o:microsoft:windows_10

Required KB Items: SMB/Registry/Enumerated, WMI/Windows App Store/Enumerated

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/14/2021

Vulnerability Publication Date: 12/14/2021

CISA Known Exploited Dates: 12/29/2021

Reference Information

CVE: CVE-2021-43890