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AUSCERT External Security Bulletin Redistribution
ESB-2016.2670
Microsoft Security Bulletin MS16-133: Security Update for
Microsoft Office (3199168)
9 November 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Office
Publisher: Microsoft
Operating System: Windows
OS X
Impact/Access: Access Confidential Data -- Remote with User Interaction
Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2016-7245 CVE-2016-7244 CVE-2016-7236
CVE-2016-7235 CVE-2016-7234 CVE-2016-7233
CVE-2016-7232 CVE-2016-7231 CVE-2016-7230
CVE-2016-7229 CVE-2016-7228 CVE-2016-7213
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS16-133
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Microsoft Security Bulletin MS16-133: Security Update for Microsoft Office
(3199168)
Severity: Important
Version: 1.0
Published Date: November 8, 2016
Executive Summary
This security update resolves vulnerabilities in Microsoft Office. The
most severe of the vulnerabilities could allow remote code execution if
a user opens a specially crafted Microsoft Office file. An attacker who
successfully exploited the
vulnerabilities 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.
Affected Software
Microsoft Office 2007
Microsoft Office 2010
Microsoft Office 2013
Microsoft Office 2013 RT
Microsoft Office 2016
Microsoft Office for Mac 2011
Microsoft Office 2016 for Mac
Vulnerability Information
Microsoft Office Information Disclosure Vulnerability - CVE-2016-7233
An information disclosure vulnerability exists when Office or Word 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 bounds 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 variable.
The following table contains links to the standard entry for each
vulnerability in the Common Vulnerabilities and Exposures list:
Vulnerability title CVE number Publicly disclosed Exploited
Microsoft Office Information Disclosure Vulnerability CVE-2016-7233 No No
Multiple Microsoft Office Memory Corruption Vulnerabilities
Multiple remote code execution vulnerabilities exist in Microsoft Office
software when the Office software fails to properly handle objects in
memory. An attacker who successfully exploited the vulnerabilities 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 vulnerabilities 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 vulnerabilities
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 vulnerabilities. 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 these
vulnerabilities. The security update addresses the vulnerabilities by
correcting how Office handles objects in memory.
The following table contains links to the standard entry for each
vulnerability in the Common Vulnerabilities and Exposures list:
Vulnerability title CVE number Publicly disclosed Exploited
Microsoft Office Memory Corruption Vulnerability CVE-2016-7213 No No
Microsoft Office Memory Corruption Vulnerability CVE-2016-7228 No No
Microsoft Office Memory Corruption Vulnerability CVE-2016-7229 No No
Microsoft Office Memory Corruption Vulnerability CVE-2016-7230 No No
Microsoft Office Memory Corruption Vulnerability CVE-2016-7231 No No
Microsoft Office Memory Corruption Vulnerability CVE-2016-7232 No No
Microsoft Office Memory Corruption Vulnerability CVE-2016-7234 No No
Microsoft Office Memory Corruption Vulnerability CVE-2016-7235 No No
Microsoft Office Memory Corruption Vulnerability CVE-2016-7236 No No
Microsoft Office Memory Corruption Vulnerability CVE-2016-7245 No No
Microsoft Office Denial of Service Vulnerability - CVE-2016-7244
A denial of service vulnerability exists when a specially crafted file is
opened in Microsoft Office. An attacker who successfully exploited the
vulnerability could cause Office to stop responding. Note that the denial
of service would not allow an attacker to execute code or to elevate their
user rights.
For an attack to be successful, this vulnerability requires that a user open
a specially crafted file with an affected version of Microsoft Office. In
an email attack scenario, an attacker could exploit the vulnerability by
sending a specially crafted file to the user and by convincing the user
to open the file.
The update addresses the vulnerability by correcting how Microsoft Office
handles objects in memory.
The following table contains links to the standard entry for each
vulnerability in the Common Vulnerabilities and Exposures list:
Vulnerability title CVE number Publicly disclosed Exploited
Microsoft Office Denial of Service Vulnerability CVE-2016-7244 No No
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