Security Updates for Microsoft SharePoint Server 2019 (December 2021)

high Nessus Plugin ID 158165

Synopsis

The Microsoft SharePoint Server 2019 installation on the remote host is affected by multiple vulnerabilities.

Description

The Microsoft SharePoint Server 2019 installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

- A session spoofing vulnerability exists. An attacker can exploit this to perform actions with the privileges of another user. (CVE-2021-42320, CVE-2021-43242)

- A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2021-42294, CVE-2021-42309)

Solution

Microsoft has released the following security updates to address this issue:
-KB5002054
-KB5002061

See Also

https://support.microsoft.com/en-us/help/5002054

https://support.microsoft.com/en-us/help/5002061

Plugin Details

Severity: High

ID: 158165

File Name: smb_nt_ms21_dec_office_sharepoint_2019.nasl

Version: 1.2

Type: local

Agent: windows

Published: 2/18/2022

Updated: 2/22/2022

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

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

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

CVSS Score Source: CVE-2021-42309

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: cpe:/a:microsoft:sharepoint_server

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 12/14/2021

Vulnerability Publication Date: 12/14/2021

Reference Information

CVE: CVE-2021-42294, CVE-2021-42309, CVE-2021-42320, CVE-2021-43242

MSKB: 5002054, 5002061

MSFT: MS21-5002054, MS21-5002061