Security Updates for Microsoft Office Online Server and Microsoft Office Web Apps (December 2018)

high Nessus Plugin ID 119597
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 Office Online Server or Microsoft Office Web Apps installation on the remote host is missing a security update.

Description

The Microsoft Office Online Server or Microsoft Office Web Apps installation on the remote host is missing a security update. It is, therefore, affected by the following vulnerability :

- A remote code execution vulnerability exists in Microsoft PowerPoint 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-2018-8628)

Solution

Microsoft has released the following security updates to address this issue:
-KB2965312
-KB4461551

See Also

http://www.nessus.org/u?f29364e5

http://www.nessus.org/u?9bee6d7a

Plugin Details

Severity: High

ID: 119597

File Name: smb_nt_ms18_dec_office_web.nasl

Version: 1.3

Type: local

Agent: windows

Published: 12/11/2018

Updated: 11/1/2019

Dependencies: office_installed.nasl, microsoft_owa_installed.nbin, microsoft_office_compatibility_pack_installed.nbin, smb_hotfixes.nasl, ms_bulletin_checks_possible.nasl

Risk Information

CVSS Score Source: CVE-2018-8628

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

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

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

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: 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: 12/11/2018

Vulnerability Publication Date: 12/11/2018

Reference Information

CVE: CVE-2018-8628

MSKB: 2965312, 4461551

MSFT: MS18-2965312, MS18-4461551