Security Update for Microsoft Office Web Apps Server / Office Online Server (June 2017)

high Nessus Plugin ID 100783
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.


An application installed on the remote Windows host is affected by multiple vulnerabilities.


The Microsoft Office Online Server or Office Web Apps Server installed on the remote Windows host is missing a security update. It is, therefore, affected by multiple remote code execution vulnerabilities in Microsoft Office software due to improper handling of objects in memory. An unauthenticated, remote attacker can exploit these vulnerabilities, by convincing a user to open a specially crafted Office document, to execute arbitrary code in the context of the current user.


Microsoft has released a set of patches for Microsoft Office Web Apps Server 2013 and Office Online Server.

See Also

Plugin Details

Severity: High

ID: 100783

File Name: smb_nt_ms17_jun_office_web.nasl

Version: 1.9

Type: local

Agent: windows

Published: 6/14/2017

Updated: 11/15/2018

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

Risk Information


Risk Factor: Medium

Score: 5.9


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


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: E:U/RL:O/RC:C

Vulnerability Information

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

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 6/13/2017

Vulnerability Publication Date: 6/13/2017

Reference Information

CVE: CVE-2017-8509, CVE-2017-8511, CVE-2017-8512

BID: 98812, 98815, 98816

MSKB: 3203391, 3203466, 3203485

MSFT: MS17-3203391, MS17-3203466, MS17-3203485

IAVA: 2017-A-0179