Security Updates for Microsoft SharePoint Server 2019 (October 2021)

high Nessus Plugin ID 154030

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 :

- An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive information. (CVE-2021-40482)

- A session spoofing vulnerability exists. An attacker can exploit this to perform actions with the privileges of another user. (CVE-2021-40483, CVE-2021-40484)

- A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2021-40486, CVE-2021-40487, CVE-2021-41344) Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Microsoft has released the following security updates to address these issues:
-KB5002028

See Also

https://support.microsoft.com/en-us/help/5002028

Plugin Details

Severity: High

ID: 154030

File Name: smb_nt_ms21_oct_office_sharepoint_2019.nasl

Version: 1.6

Type: local

Agent: windows

Published: 10/12/2021

Updated: 5/9/2022

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

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

CVSS Score Source: CVE-2021-40486

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

CVSS Score Source: CVE-2021-41344

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: 10/11/2021

Vulnerability Publication Date: 10/11/2021

Reference Information

CVE: CVE-2021-40482, CVE-2021-40483, CVE-2021-40484, CVE-2021-40486, CVE-2021-40487, CVE-2021-41344

MSKB: 5002028

MSFT: MS21-5002028

IAVA: 2021-A-0469-S