MS06-060 Microsoft Word Memmove Code Execution
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
format allows a attacker to create a malicious Microsoft Word document that when
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 WordDocument file.
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 parameter
to a memmove call. If the size passed to memmove is > 0x8000, it will extend to
DWORD(0x8000 = 0xffff8001), and will copy 0xffff8001 bytes to the stack.
This is a code execution vulnerability that may be exploited to compromise
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:
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