Security Updates for Microsoft Office Viewer Products / Office Compatibility Products (August 2018)

high Nessus Plugin ID 111698
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 Viewer / Office Compatibility Office Products are affected by multiple vulnerabilities.

Description

The Microsoft Office Viewer / Office Compatibility Products are missing security updates. It is, therefore, affected by multiple vulnerabilities :

- A remote code execution vulnerability exists in Microsoft Excel 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-2018-8375)

- An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory. An attacker who exploited the vulnerability could use the information to compromise the users computer or data. (CVE-2018-8382)

- An information disclosure vulnerability exists when Microsoft Office software reads out of bound memory due to an uninitialized variable, which could disclose the contents of memory. An attacker who successfully exploited the vulnerability could view out of bound memory. Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Office software. The security update addresses the vulnerability by properly initializing the affected variable. (CVE-2018-8378)

Solution

Microsoft has released the following security updates to address this issue:
-KB4032212
-KB4032213
-KB4092433
-KB4022195
-KB4092434

See Also

http://www.nessus.org/u?044626c2

http://www.nessus.org/u?242a4c69

http://www.nessus.org/u?ec324acb

http://www.nessus.org/u?aa676634

http://www.nessus.org/u?c214da08

Plugin Details

Severity: High

ID: 111698

File Name: smb_nt_ms18_aug_office_viewers_compat.nasl

Version: 1.5

Type: local

Agent: windows

Published: 8/14/2018

Updated: 11/4/2019

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

Risk Information

CVSS Score Source: CVE-2018-8375

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:word_viewer, cpe:/a:microsoft:excel_viewer, cpe:/a:microsoft:office_compatibility_pack

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 8/14/2018

Vulnerability Publication Date: 8/14/2018

Reference Information

CVE: CVE-2018-8375, CVE-2018-8378, CVE-2018-8382

BID: 104989, 104996, 105000

MSKB: 4032212, 4032213, 4092433, 4022195, 4092434

MSFT: MS18-4032212, MS18-4032213, MS18-4092433, MS18-4022195, MS18-4092434