Security Updates for Microsoft SharePoint Server 2019 (August 2020)

high Nessus Plugin ID 139503

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Synopsis

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

Description

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

- A spoofing vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected SharePoint server. The attacker who successfully exploited the vulnerability could then perform cross- site scripting attacks on affected systems and run script in the security context of the current user.
These attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim's identity to take actions on the SharePoint site on behalf of the user, such as change permissions and delete content, and inject malicious content in the browser of the user. The security update addresses the vulnerability by helping to ensure that SharePoint Server properly sanitizes web requests. (CVE-2020-1499, CVE-2020-1500, CVE-2020-1501)

- An information disclosure vulnerability exists when Microsoft SharePoint Server fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2020-1505)

- An information disclosure vulnerability exists when Microsoft Word improperly discloses the contents of its memory. An attacker who exploited the vulnerability could use the information to compromise the users computer or data. (CVE-2020-1502, CVE-2020-1503, CVE-2020-1583)

- A cross-site-scripting (XSS) vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected SharePoint server. The attacker who successfully exploited the vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user. The attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim's identity to take actions on the SharePoint site on behalf of the user, such as change permissions and delete content, and inject malicious content in the browser of the user. The security update addresses the vulnerability by helping to ensure that SharePoint Server properly sanitizes web requests. (CVE-2020-1573, CVE-2020-1580)

Solution

Microsoft has released security updates for Microsoft SharePoint Server.

Plugin Details

Severity: High

ID: 139503

File Name: smb_nt_ms20_aug_office_sharepoint_2019.nasl

Version: 1.11

Type: local

Agent: windows

Family: Windows : Microsoft Bulletins

Published: 8/11/2020

Updated: 6/6/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

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

CVSS Score Source: CVE-2020-1501

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

CVSS Score Source: CVE-2020-1583

Vulnerability Information

CPE: cpe:/a:microsoft:sharepoint_server:2019, cpe:/a:microsoft:sharepoint_foundation

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 8/11/2020

Vulnerability Publication Date: 8/11/2020

Reference Information

CVE: CVE-2020-1499, CVE-2020-1500, CVE-2020-1501, CVE-2020-1502, CVE-2020-1503, CVE-2020-1505, CVE-2020-1573, CVE-2020-1580, CVE-2020-1583

IAVA: 2020-A-0362-S

MSFT: MS20-4484471, MS20-4484472

MSKB: 4484471, 4484472

Detections

Analytics