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ESB-2014.0724 - [Win] Microsoft Office: Reduced security - Unknown/unspecified

Date: 14 May 2014

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.0724
        Vulnerabilities in Microsoft Office Could Allow Remote Code
                            Execution (2961037)
                                14 May 2014

===========================================================================

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

Product:           Microsoft Office 2007
                   Microsoft Office 2010
                   Microsoft Office 2013
                   Microsoft Office 2013 RT
Publisher:         Microsoft
Operating System:  Windows
Impact/Access:     Reduced Security -- Unknown/Unspecified
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-1809  

Original Bulletin: 
   http://technet.microsoft.com/en-us/security/bulletin/ms14-023

- --------------------------BEGIN INCLUDED TEXT--------------------

Microsoft Security Bulletin - MS14-023 - Important

Vulnerabilities in Microsoft Office Could Allow Remote Code Execution 
(2961037)

Published Date: May 13, 2014

Version: 1.0

General Information

Executive Summary 

This security update resolves one privately reported vulnerability in an 
implementation of the MSCOMCTL common controls library. The vulnerability 
could allow security feature bypass if a user views a specially crafted 
webpage in a web browser capable of instantiating COM components, such as 
Internet Explorer. In a web-browsing attack scenario, an attacker who 
successfully exploited this vulnerability could bypass the Address Space 
Layout Randomization (ASLR) security feature, which helps protect users from a 
broad class of vulnerabilities. The security feature bypass by itself does not 
allow arbitrary code execution. However, an attacker could use this ASLR 
bypass vulnerability in conjunction with another vulnerability, such as a 
remote code execution vulnerability that could take advantage of the ASLR 
bypass to run arbitrary code.

This security update is rated Important for supported editions of Microsoft 
Office 2007, Microsoft Office 2010, and Microsoft Office 2013.

Affected Software

Microsoft Office 2007 
Microsoft Office 2010 
Microsoft Office 2013 
Microsoft Office 2013 RT

Vulnerability Information

MSCOMCTL ASLR Vulnerability - CVE-2014-1809

A security feature bypass vulnerability exists because the MSCOMCTL common 
controls library used by Microsoft Office software does not properly 
implement Address Space Layout Randomization (ASLR). The vulnerability 
could allow an attacker to bypass the ASLR security feature, which helps 
protect users from a broad class of vulnerabilities. The security feature 
bypass by itself does not allow arbitrary code execution. However, an 
attacker could use this ASLR bypass vulnerability in conjunction with 
another vulnerability, such as a remote code execution vulnerability that 
could take advantage of the ASLR bypass to run arbitrary code.

- --------------------------END INCLUDED TEXT--------------------

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
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                On call after hours for member emergencies only.
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