Microsoft Office 2016: Execute Arbitrary Code/Commands -- Remote with User Interaction

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.0068
         Microsoft Security Bulletin MS17-002: Security Update for
                        Microsoft Office (3214291)
                              10 January 2017

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Microsoft Office 2016
Publisher:         Microsoft
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-0003  

Original Bulletin: 
   https://technet.microsoft.com/en-us/library/security/MS17-002

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Microsoft Security Bulletin MS17-002: Security Update for Microsoft Office
(3214291)

Severity: Critical

Executive Summary

This security update resolves a vulnerability in Microsoft Office. The
vulnerability could allow remote code execution if a user opens a specially
crafted Microsoft Office file. An attacker who successfully exploited
the vulnerability could run arbitrary code in the context of the current
user. Customers whose accounts are configured to have fewer user rights on
the system could be less impacted than those who operate with administrative
user rights.
The security update addresses the vulnerability by correcting how affected
versions of Office and Office components handle objects in memory.

Affected Software

Microsoft Office 2016

Vulnerability Information

Microsoft Office Memory Corruption Vulnerability

A remote code execution vulnerability exists in Microsoft Office software
when the Office 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. Users whose
accounts are configured to have fewer user rights on the system could be
less impacted than users who operate with administrative user rights.

Exploitation of the vulnerability requires that a user open a specially
crafted file with an affected version of Microsoft Office software. In an
email attack scenario an attacker could exploit the vulnerability by sending
the specially crafted file to the user and convincing the user to open the
file. In a web-based attack scenario an attacker could host a website (or
leverage a compromised website that accepts or hosts user-provided content)
that contains a specially crafted file that is designed to exploit the
vulnerability. An attacker would have no way to force users to visit the
website. Instead, an attacker would have to convince users to click a link,
typically by way of an enticement in an email or Instant Messenger message,
and then convince them to open the specially crafted file.

Note that the Preview Pane is not an attack vector for this
vulnerability. The security update addresses the vulnerability by correcting
how Office handles objects in memory.

Vulnerability title					CVE number	Publicly disclosed	Exploited
Microsoft Office Memory Corruption Vulnerability	CVE-2017-0003	No			No

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