From: CS_Advisories Mailbox (CS_Advisories_Mailboxsymantec.com)
Date: Tue Mar 14 2006 - 13:30:41 CST

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                   Symantec Professional Services
 
                         www.symantec.com
                        Security Advisory

Advisory ID : SYMSA-2006-001
Advisory Name: Buffer overflow in Microsoft Office 2000, Office XP
               (2002), and Office 2003 Routing Slip Metadata.
Release Date : 03-14-2006
Application : Microsoft Word, Microsoft Excel, Microsoft PowerPoint,
               Microsoft Outlook
Platform : Windows
Severity : Remotely exploitable / User access
Author : Ollie Whitehouse / ollie_whitehousesymantec.com
Vendor Status: Duplicated and verified by Microsoft, patch available.
CVE Number : CVE-2006-0009
Reference : http://www.securityfocus.com/bid/17000


Overview:

        There exists a buffer overflow in Microsoft Word, Excel,
        PowerPoint, and Outlook in the parsing of the routing slip
        metadata. The result is that when a user closes a malicious
        document, arbitrary code can be executed on the host in
        question.


Details:

        Microsoft Office supports the concept of routing slips. These
        can be embedded within documents to ease the process of
        collaborative working. During Symantec’s investigation it was
        discovered that within the metadata of Microsoft’s document
        format that there is both a length value and a null
        terminated string for the different sections of a routing
        slip. Upon further investigation it was discovered that the
        affected applications allocate memory based on the size
        contained within the length field, but then proceeds to copy
        the entire string up until the null termination.

        The result in the case of Microsoft Word 2002 SP3 (fully
        patched), is that we overwrite the saved return address on
        the stack with a Unicode value. This can be used to obtain
        control of the execution within the program.

        Microsoft Word, Excel, PowerPoint and Outlook all behave
        slightly differently and in the case of Office 2003, it
        appears that the values move from the stack to the heap
        which makes exploitation more complicated, yet not impossible.


Vendor Response:

        The above vulnerability was addressed by Microsoft Security
        Bulletin MS06-012. For details see
        http://www.microsoft.com/technet/security/Bulletin/MS06-012.mspx
 
        If there are any further questions about this statement,
        please contact Microsoft support.

Recommendation:
        Apply the patch supplied by Microsoft according to your
        organization's software maintenance test and deployment
        procedures.

Common Vulnerabilities and Exposures (CVE) Information:

        The Common Vulnerabilities and Exposures (CVE) project has
        assigned the following names to these issues. These are
        candidates for inclusion in the CVE list
        (http://cve.mitre.org), which standardizes names for
        security problems.


        CVE-2006-0009


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Copyright (c) 2006 by Symantec Corp.
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time of publishing based on currently available information. Use
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