Security Updates for Microsoft SharePoint Server (June 2020)

high Nessus Plugin ID 137269

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 :

- An open redirect vulnerability exists in Microsoft SharePoint that could lead to spoofing. (CVE-2020-1323)

- An elevation of privilege vulnerability exists in Microsoft SharePoint. An attacker who successfully exploited this vulnerability could attempt to impersonate another user of the SharePoint server.
(CVE-2020-1295)

- A remote code execution vulnerability exists in Microsoft SharePoint Server when it fails to properly identify and filter unsafe ASP.Net web controls. An authenticated attacker who successfully exploited the vulnerability could use a specially crafted page to perform actions in the security context of the SharePoint application pool process. (CVE-2020-1181)

- 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-2020-1177, CVE-2020-1183, CVE-2020-1297, CVE-2020-1298, CVE-2020-1318, CVE-2020-1320)

- An elevation of privilege vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted authentication request to an affected SharePoint server. An attacker who successfully exploited this vulnerability could execute malicious code on a vulnerable server in the context of the SharePoint application pool account. (CVE-2020-1178)

- 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-2020-1148, CVE-2020-1289)

Solution

Microsoft has released the following security updates to address this issue:
-KB4484409
-KB4484414
-KB4484391
-KB4484402
-KB4484400
-KB4484405

See Also

http://www.nessus.org/u?c3ed2d30

http://www.nessus.org/u?25f013bc

http://www.nessus.org/u?e56f1871

http://www.nessus.org/u?0a150f7d

http://www.nessus.org/u?8f698971

http://www.nessus.org/u?b403bd01

Plugin Details

Severity: High

ID: 137269

File Name: smb_nt_ms20_jun_office_sharepoint.nasl

Version: 1.9

Type: local

Agent: windows

Published: 6/9/2020

Updated: 6/6/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

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-2020-1295

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:2010, cpe:/a:microsoft:sharepoint_foundation, cpe:/a:microsoft:sharepoint_server:2019, cpe:/a:microsoft:sharepoint_server:2013, cpe:/a:microsoft:sharepoint_server:2016

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/9/2020

Vulnerability Publication Date: 6/9/2020

Exploitable With

Core Impact

Reference Information

CVE: CVE-2020-1148, CVE-2020-1177, CVE-2020-1178, CVE-2020-1181, CVE-2020-1183, CVE-2020-1289, CVE-2020-1295, CVE-2020-1297, CVE-2020-1298, CVE-2020-1318, CVE-2020-1320, CVE-2020-1323

IAVA: 2020-A-0251-S

MSFT: MS20-4484391, MS20-4484400, MS20-4484402, MS20-4484405, MS20-4484409, MS20-4484414

MSKB: 4484391, 4484400, 4484402, 4484405, 4484409, 4484414