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

High Nessus Plugin ID 105698

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 :

- An Office RTF remote code execution vulnerability exists in Microsoft Office software when the Office software fails to properly handle RTF files. 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-2018-0797)

- A remote code execution vulnerability exists in Microsoft Office 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-2018-0792)

Solution

Microsoft has released the following security updates to address this issue:
-KB4011021
-KB4011615
-KB4011648

See Also

http://www.nessus.org/u?16397184

http://www.nessus.org/u?9c67cb23

http://www.nessus.org/u?3bd3dba0

Plugin Details

Severity: High

ID: 105698

File Name: smb_nt_ms18_jan_office_web.nasl

Version: 1.6

Type: local

Agent: windows

Published: 2018/01/09

Modified: 2018/07/30

Dependencies: 27524, 57033, 93232, 13855, 84669

Risk Information

Risk Factor: High

CVSSv2

Base Score: 9.3

Temporal Score: 6.9

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSSv3

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: 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 Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2018/01/09

Vulnerability Publication Date: 2018/01/09

Reference Information

CVE: CVE-2018-0792, CVE-2018-0797

BID: 102381, 102406

MSKB: 4011021, 4011615, 4011648

MSFT: MS18-4011021, MS18-4011615, MS18-4011648

IAVA: 2018-A-0009