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[Full-disclosure] MS06-060 Microsoft Word Memmove Code Execution
Date: Wed Oct 11 2006 - 18:34:27 CDT
McAfee Avert Labs Security Advisory
Vendor Notification Date: 2006-07-06
Public Release Date: 2006-10-10
Microsoft Word Memmove Code Execution
An integer bug (stack overflow) exists in the Microsoft Word file
format. The file
format allows a attacker to create a malicious Microsoft Word document
opened, will execute arbitrary code.
RISK FACTOR: CRITICAL
* Affected software
Microsoft Word 2000
Microsoft Word 2002
Microsoft Word 2003
Microsoft Word 2004 for Mac
Microsoft Word v. X for Mac
* Vulnerability Information
The specific flaw exists during the processing of a malicious
The overflow can be triggered during the parsing at offset 0xb4c in the
stream. At this offset, there is a WORD size that is used as the third
to a memmove call. If the size passed to memmove is > 0x8000, it will
DWORD(0x8000 = 0xffff8001), and will copy 0xffff8001 bytes to the stack.
This is a code execution vulnerability that may be exploited to
compromise users that
open a malformed Microsoft Word document.
Install the Microsoft-provided vendor patch.
This vulnerability was discovered by Chen Xiao Bo of McAfee Avert Labs.
* Contact Information
For more information about the McAfee Avert Labs, visit our website at:
* Legal Notice
The information contained within this advisory is Copyright (C) 2006
McAfee, Inc. It may be redistributed provided that no fee is charged
for distribution and that the advisory is not modified in any way.
McAfee, Inc. and McAfee Avert Labs are registered Trademarks of McAfee,
Inc. and/or its affiliated companies in the United States and/or other
Countries. All other registered and unregistered trademarks in this
document are the sole property of their respective owners.
Dave Marcus, B.A., CCNA, MCSE
Security Research and Communications Manager
McAfee(r) Avert(r) Labs
(443) 321-3771 Office
(443) 668-0048 Mobile
McAfee Threat Center
McAfee Avert Labs Research Blog <http://www.avertlabs.com/research/blog>
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