Date: Tue, 14 Mar 2006 11:30:41 -0800
From: CS_Advisories Mailbox <CS_Advisories_Mailbox@...antec.com>
To: bugtraq@...urityfocus.com
Subject: SYMSA-2006-001:  Buffer overflow in Microsoft Office 2000, Office XP (2002), and
 Office 2003 Routing Slip Metadata

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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_whitehouse@...antec.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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