Security Updates for Microsoft Office Online Server and Microsoft Office Web Apps (December 2020)

high Nessus Plugin ID 143556

Synopsis

The Microsoft Office Online Server or Microsoft Office Web Apps installation on the remote host is affected by multiple vulnerabilities.

Description

The Microsoft Office Online Server or Microsoft Office Web Apps installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities :

- A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2020-17122, CVE-2020-17123, CVE-2020-17125, CVE-2020-17128, CVE-2020-17129)

- An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive information. (CVE-2020-17126)

Solution

Microsoft has released the following security updates to address this issue:
-KB4486750
-KB4486760
-KB4486704

See Also

http://www.nessus.org/u?69a90119

http://www.nessus.org/u?c437eece

http://www.nessus.org/u?d1ad1c4f

Plugin Details

Severity: High

ID: 143556

File Name: smb_nt_ms20_dec_office_web.nasl

Version: 1.6

Type: local

Agent: windows

Published: 12/8/2020

Updated: 12/5/2022

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2020-17129

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/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

Vulnerability Information

CPE: cpe:/a:microsoft:office_online_server, cpe:/a:microsoft:office_web_apps

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 12/8/2020

Vulnerability Publication Date: 12/8/2020

Reference Information

CVE: CVE-2020-17122, CVE-2020-17123, CVE-2020-17125, CVE-2020-17126, CVE-2020-17128, CVE-2020-17129

IAVA: 2021-A-0017-S

MSFT: MS20-4486704, MS20-4486750, MS20-4486760

MSKB: 4486704, 4486750, 4486760