Original release date: November 14, 2014

Systems Affected

• Microsoft Windows Vista, 7, 8, 8.1, RT, and RT 8.1
• Microsoft Server 2003, Server 2008, Server 2008 R2, Server 2012, and Server 2012 R2

Overview

A vulnerability in Microsoft Windows Object Linking and Embedding (OLE) could allow remote code execution if a user views a specially-crafted web page in Internet Explorer.[1]

Description

The Microsoft Windows OLE OleAut32.dll library provides the SafeArrayRedim function that allows resizing of SAFEARRAY objects in memory.[2] In certain circumstances, this library does not properly check sizes of arrays when an error occurs. The improper size allows an attacker to manipulate memory in a way that can bypass the Internet Explorer Enhanced Protected Mode (EPM) sandbox as well as the Enhanced Mitigation Experience Toolkit (EMET).

This vulnerability can be exploited using a specially-crafted web page utilizing VBscript in Internet Explorer. However, it may impact other software that makes use of OleAut32.dll and VBscript.

Exploit code is publicly available for this vulnerability. Additional details may be found in CERT/CC Vulnerability Note VU#158647.

Impact

Arbitrary code can be run on the computer with user privileges. If the user is an administrator, the attacker may run arbitrary code as an administrator, fully compromising the system. 

Solution

An update is available from Microsoft.[3] Please see Microsoft Security Bulletin MS14-064 for more details and mitigation guidance, and apply the necessary updates.

References

• [1] NIST Vulnerability Summary for CVE-2014-6332
• [2] IBM X-Force Researcher Finds Significant Vulnerability in Microsoft Windows
• [3] Microsoft Security Bulletin MS14-064

Revision History

• •November 14, 2014: Initial Release

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