Security Update for Microsoft Office Products (April 2017) (Petya)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

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

Description :

The Microsoft Office application, Office Web Apps, or SharePoint
Server installed on the remote Windows host is missing a security
update. It is, therefore, affected by multiple vulnerabilities :

- An arbitrary code execution vulnerability exists in
Microsoft Outlook due to improper parsing of email
messages. An unauthenticated, remote attacker can
exploit this, via a specially crafted email message, to
execute arbitrary code. (CVE-2017-0106)

- An information disclosure vulnerability exists in
Microsoft Office due to improper handling of objects in
memory. An unauthenticated, remote attacker can exploit
this, by convincing a user to open a specially crafted
Excel file, to disclose the contents of memory.
(CVE-2017-0194)

- A cross-site scripting (XSS) vulnerability exists in
Office Web Apps Server due to improper validation of
input before returning it to users. An authenticated,
remote attacker can exploit this, via a specially
crafted request, to execute arbitrary script code in a
user's browser session. (CVE-2017-0195)

- An arbitrary code execution vulnerability exists in
Microsoft Office due to improper validation of input
before loading dynamic link library (DLL) files. An
unauthenticated, remote attacker can exploit this, by
convincing a user to open a specially crafted Office
document, to execute arbitrary code. (CVE-2017-0197)

- An arbitrary code execution vulnerability exists in
Microsoft Office and Windows WordPad due to improper
validation of user-supplied input. An unauthenticated,
remote attacker can exploit this, by convincing a user
to open a specially crafted file, to execute arbitrary
code. Note that this vulnerability is being utilized to
spread the Petya ransomware. (CVE-2017-0199)

- A security feature bypass vulnerability exists in
Microsoft Office due to improper parsing of file
formats. An unauthenticated, remote attacker can exploit
this, by convincing a user into opening a specially
crafted file, to bypass security features.
(CVE-2017-0204)

- A spoofing vulnerability in Microsoft Outlook due to
improper validation of input passed via HTML tags. An
unauthenticated, remote attacker can exploit this, by
sending an email with specific HTML tags, to display a
malicious authentication prompt and gain access to a
user's authentication information or login credentials.
(CVE-2017-0207)

- An unspecified flaw exists in Microsoft Office in the
Encapsulated PostScript (EPS) filter that allows an
attacker to have an unspecified impact. (CVE-2017-2605)

See also :

https://portal.msrc.microsoft.com/en-us/security-guidance/summary

Solution :

Microsoft has released a set of patches for Microsoft Office 2007,
2010, 2013, and 2016; Microsoft Excel 2007 and 2010; Microsoft OneNote
2007 and 2010; Microsoft Outlook 2007, 2010, 2013, and 2016; Microsoft
Office Compatibility Pack; Excel Services on Microsoft SharePoint
Server 2010 and 2013; Microsoft Excel Web App 2010; Microsoft Office
Web Apps Server 2010 and 2013; and Office Online Server.

Risk factor :

High / CVSS Base Score : 9.3
(CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 8.0
(CVSS2#E:F/RL:TF/RC:ND)
Public Exploit Available : true

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