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             AUSCERT External Security Bulletin Redistribution

       Microsoft Security Bulletin MS16-116: Security Update in OLE
            Automation for VBScript Scripting Engine (3188724)
                             14 September 2016


        AusCERT Security Bulletin Summary

Product:           Microsoft Windows
Publisher:         Microsoft
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-3375  

Original Bulletin: 

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Microsoft Security Bulletin MS16-116: Security Update in OLE Automation for 
VBScript Scripting Engine (3188724)

Executive Summary

This security update resolves a vulnerability in Microsoft Windows. The 
vulnerability could allow remote code execution if an attacker successfully 
convinces a user of an affected system to visit a malicious or compromised 
website. Note that you must install two updates to be protected from the 
vulnerability discussed in this bulletin: The update in this bulletin, 
MS16-116, and the update in MS16-104.

The security update affects all supported releases of Microsoft Windows and is
rated Critical on client operating systems and Moderate on servers.

Affected Software

Windows Vista

Windows Server 2008

Windows 7

Windows Server 2008 R2

Windows 8.1

Windows Server 2012

Windows Server 2012 R2

Windows RT 8.1

Windows 10

Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core 

Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core 

Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core 

Windows Server 2012 (Server Core installation)

Windows Server 2012 R2 (Server Core installation)

Vulnerability Information

Scripting Engine Memory Corruption Vulnerability - CVE-2016-3375

A remote code execution vulnerability exists in the way that the Microsoft OLE
Automation mechanism and the VBScript Scripting Engine in Internet Explorer 
access objects in memory. The vulnerability could corrupt memory in a way that
could allow an attacker to execute arbitrary code in the context of the 
current user. An attacker who successfully exploited the vulnerability could 
gain the same user rights as the current user. If the current user is logged 
on with administrative user rights, the attacker could take control of an 
affected system. An attacker could then install programs; view, change, or 
delete data; or create new accounts with full user rights.

An attacker could host a specially crafted website that is designed to exploit
the vulnerability through Internet Explorer, and then convince a user to view
the website. The attacker could also take advantage of compromised websites, 
or websites that accept or host user-provided content or advertisements, by 
adding specially crafted content that could exploit the vulnerability. In all
cases, however, an attacker would have no way to force users to view the 
attacker-controlled content. Instead, an attacker would have to convince users
to take action, typically via an enticement in email or instant message, or by
getting them to open an email attachment.

The update, in conjunction with the Internet Explorer update in MS16-104, 
addresses the vulnerability by modifying how the Microsoft OLE Automation 
mechanism and the VBScript Scripting Engine in Internet Explorer handle 
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

Scripting Engine Memory Corruption Vulnerability 	CVE-2016-3375 	No 			No

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