Security Updates for Microsoft Sharepoint Server (October 2017)

high Nessus Plugin ID 103786
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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 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-2017-11775, CVE-2017-11777, CVE-2017-11820)

- A remote code execution vulnerability exists in Microsoft Office software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2017-11826)

Solution

Microsoft has released the following security updates to address this issue:
-KB3213623
-KB4011068
-KB4011170
-KB4011180
-KB4011217

See Also

http://www.nessus.org/u?a44abe21

http://www.nessus.org/u?9244fe07

http://www.nessus.org/u?fd221883

http://www.nessus.org/u?f914ba0b

http://www.nessus.org/u?aaee58c0

Plugin Details

Severity: High

ID: 103786

File Name: smb_nt_ms17_oct_office_sharepoint.nasl

Version: 1.9

Type: local

Agent: windows

Published: 10/11/2017

Updated: 11/12/2019

Dependencies: microsoft_sharepoint_installed.nbin, smb_hotfixes.nasl, ms_bulletin_checks_possible.nasl, microsoft_office_compatibility_pack_installed.nbin

Risk Information

CVSS Score Source: CVE-2017-11826

VPR

Risk Factor: Critical

Score: 9.5

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 8.1

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

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

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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

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

Vulnerability Information

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

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/10/2017

Vulnerability Publication Date: 10/10/2017

Exploitable With

Core Impact

Reference Information

CVE: CVE-2017-11775, CVE-2017-11777, CVE-2017-11820, CVE-2017-11826

BID: 101097, 101105, 101155, 101219

MSKB: 3213623, 4011068, 4011170, 4011180, 4011217

MSFT: MS17-3213623, MS17-4011068, MS17-4011170, MS17-4011180, MS17-4011217

IAVA: 2017-A-0291