BugTraq
SYMSA-2006-001: Buffer overflow in Microsoft Office 2000, Office XP (2002), and Office 2003 Routing Slip Metadata Mar 14 2006 07:30PM
CS_Advisories Mailbox (CS_Advisories_Mailbox symantec com)
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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 (at) symantec (dot) com [email concealed]

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 Symantecâ??s investigation it was

discovered that within the metadata of Microsoftâ??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.

Permission to redistribute this alert electronically is granted

as long as it is not edited in any way unless authorized by

Symantec Consulting Services. Reprinting the whole or part of

this alert in any medium other than electronically requires

permission from cs_advisories (at) symantec (dot) com. [email concealed]

Disclaimer

The information in the advisory is believed to be accurate at the

time of publishing based on currently available information. Use

of the information constitutes acceptance for use in an AS IS

condition. There are no warranties with regard to this information.

Neither the author nor the publisher accepts any liability for any

direct, indirect, or consequential loss or damage arising from use

of, or reliance on, this information.

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