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VUPEN Security Advisory

VUPEN Security Advisory
Posted Oct 15, 2010
Authored by Chaouki Bekrar, VUPEN | Site vupen.com

VUPEN Vulnerability Research Team discovered a critical vulnerability in Microsoft Office Word. The vulnerability is caused by a heap overflow error when processing LVL structures in a Word document, which could be exploited by remote attackers to execute arbitrary code by tricking a user into opening a specially crafted Word file.

tags | advisory, remote, overflow, arbitrary
advisories | CVE-2010-3220
SHA-256 | bb74d0d766f0270b9b87c02ab5f5390ef28efd02610d0b1145c30e50cfe149c7

VUPEN Security Advisory

Change Mirror Download
VUPEN Security Research - Microsoft Office Word LVL Structure Heap Overflow 
Vulnerability (CVE-2010-3220)

http://www.vupen.com/english/research.php


I. BACKGROUND
---------------------

Microsoft Office Word, included in the Microsoft Office suite,
is a powerful authoring program that gives the ability to create
and share documents by combining a comprehensive set of writing
tools with the easy-to-use Microsoft Office Fluent user interface.


II. DESCRIPTION
---------------------

VUPEN Vulnerability Research Team discovered a critical vulnerability
in Microsoft Office Word.

The vulnerability is caused by a heap overflow error when processing
LVL structures in a Word document, which could be exploited by remote
attackers to execute arbitrary code by tricking a user into opening
a specially crafted Word file.


III. AFFECTED PRODUCTS
---------------------------

Microsoft Office 2004 for Mac
Microsoft Office XP Service Pack 3


IV. Binary Analysis & Exploits/PoCs
---------------------------------------

In-depth binary analysis of the vulnerabilities fixed by Microsoft
in October 2010 and code execution exploits or PoCs are available
through the VUPEN Binary Analysis & Exploits Service :

http://www.vupen.com/english/services/ba-index.php


V. VUPEN Threat Protection Program
-----------------------------------

Governments and Intelligence agencies who are members of the VUPEN Threat
Protection Program (TPP) have been alerted about the vulnerability when it
was discovered by VUPEN, and have received a detailed detection guidance
to proactively protect national and critical infrastructures against
potential attacks exploiting this vulnerability:

http://www.vupen.com/english/services/tpp-index.php


VI. SOLUTION
----------------

Apply MS10-079 security update.


VII. CREDIT
--------------

This vulnerability was discovered by Chaouki Bekrar of VUPEN Security


VIII. ABOUT VUPEN Security
---------------------------

VUPEN is a leading IT security research company providing vulnerability
management and security intelligence solutions which enable enterprises
and institutions to eliminate vulnerabilities before they can be exploited,
ensure security policy compliance and meaningfully measure and manage risks.

Governmental and federal agencies, and global enterprises in the financial
services, insurance, manufacturing and technology industries rely on VUPEN
to improve their security, prioritize resources, cut time and costs, and
stay ahead of the latest threats.

* VUPEN Vulnerability Notification Service (VNS) :
http://www.vupen.com/english/services/vns-index.php

* VUPEN Binary Analysis & Exploits Service (BAE) :
http://www.vupen.com/english/services/ba-index.php

* VUPEN Threat Protection Program for Govs (TPP) :
http://www.vupen.com/english/services/tpp-index.php

* VUPEN Web Application Security Scanner (WASS) :
http://www.vupen.com/english/services/wass-index.php


IX. REFERENCES
----------------------

http://www.vupen.com/english/advisories/2010/2626
http://www.microsoft.com/technet/security/bulletin/ms10-079.mspx
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3220


X. DISCLOSURE TIMELINE
-----------------------------

2010-05-05 - Vendor notified
2010-05-05 - Vendor response
2010-08-09 - Status update received
2010-10-12 - Coordinated public Disclosure

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