Security Updates for Microsoft SharePoint Server 2019 (May 2021)

high Nessus Plugin ID 149400

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:

- Microsoft SharePoint Server Remote Code Execution Vulnerability (CVE-2021-28474, CVE-2021-31181)
- Microsoft SharePoint Information Disclosure Vulnerability (CVE-2021-31171, CVE-2021-31173)
- Microsoft SharePoint Spoofing Vulnerability (CVE-2021-26418, CVE-2021-28478, CVE-2021-31172)

Solution

Microsoft has released the following security updates to address this issue:
-KB5001916

See Also

https://support.microsoft.com/en-us/help/5001916

Plugin Details

Severity: High

ID: 149400

File Name: smb_nt_ms21_may_office_sharepoint_2019.nasl

Version: 1.6

Type: local

Agent: windows

Published: 5/11/2021

Updated: 1/2/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.4

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS Score Source: CVE-2021-31181

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 8.2

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

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

Vulnerability Information

CPE: cpe:/a:microsoft:sharepoint_server

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/11/2021

Vulnerability Publication Date: 5/11/2021

Exploitable With

Metasploit (Microsoft SharePoint Unsafe Control and ViewState RCE)

Reference Information

CVE: CVE-2021-26418, CVE-2021-28474, CVE-2021-28478, CVE-2021-31171, CVE-2021-31172, CVE-2021-31173, CVE-2021-31181

IAVA: 2021-A-0227-S

MSFT: MS21-5001916

MSKB: 5001916