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@xxxxxxxxxxxx
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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