Security Updates for Microsoft Excel Products (December 2018)

high Nessus Plugin ID 119592
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 Excel Products are affected by multiple vulnerabilities.

Description

The Microsoft Excel Products are missing security updates.
It is, therefore, affected by multiple vulnerabilities :

- An information disclosure vulnerability exists when Microsoft Excel 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 Excel software. The security update addresses the vulnerability by properly initializing the affected variable. (CVE-2018-8627)

- 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-2018-8597, CVE-2018-8636)

- 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-2018-8598)

Solution

Microsoft has released the following security updates to address this issue:
-KB4461577
-KB4461559
-KB4461542

See Also

http://www.nessus.org/u?4da77a07

http://www.nessus.org/u?1a46fea2

http://www.nessus.org/u?c7581dff

Plugin Details

Severity: High

ID: 119592

File Name: smb_nt_ms18_dec_excel.nasl

Version: 1.5

Type: local

Agent: windows

Published: 12/11/2018

Updated: 11/1/2019

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

Risk Information

CVSS Score Source: CVE-2018-8636

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:excel

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-2018-8597, CVE-2018-8598, CVE-2018-8627, CVE-2018-8636

MSKB: 4461577, 4461559, 4461542

MSFT: MS18-4461577, MS18-4461559, MS18-4461542