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Symantec Vulnerability Research http://www.symantec.com/research Security Advisory
Advisory ID : SYMSA-2006-007 Advisory Title: Microsoft Office Malformed String Parsing Vulnerability Author : Elia Florio / firstname.lastname@example.org Release Date : 07-11-2006 Application : Microsoft Office 2000, Office XP (2002), Office 2003 Platform : Windows Severity : Remotely exploitable / User access Vendor status : Duplicated and verified by Microsoft, patch available CVE Number : CVE-2006-1540 Reference : http://www.securityfocus.com/bid/18889
There exists an overflow condition in
Microsoft Office when a malformed string included in an Office file is parsed by any of the affected Office applications.
The problem resides in the code of
MSO.DLL, a shared library used by Office applications, so the vulnerability can be exploited using different attack vectors. For example, the vulnerability can be exploited using a malformed Excel 2003 file. By changing the size of the Unicode "Sheet Name" string with an incorrect size, it is possible to generate an integer overflow condition. Excel 2003 will crash while opening the malformed file due to an access violation error with an invalid value of EAX=0xFFFFFFFC.
MOV EDX,DWORD PTR DS:[EAX-4] ADD EAX,-4 ADD EDX,4
The above vulnerability was addressed for
the affected platforms via Microsoft Security Bulletin MS06-38. If there are any further questions about this statement, please contact email@example.com.
Recommendation: Follow your organization's testing procedures before applying patches or workarounds. Customers should apply Microsoft's update as soon as possible.
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.
For questions about this advisory, or to report an error: firstname.lastname@example.org
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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 firstname.lastname@example.org.
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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