full-disclosure - Secunia Research: Microsoft Excel String Parsing Uninitialised Variable Vulnerability

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Message-Id: <201006082039.o58Kd4in012801@CA-IX-1.intnet>
Date: Tue, 8 Jun 2010 22:39:04 +0200
From: Secunia Research <remove-vuln@...unia.com>
To: full-disclosure@...ts.grok.org.uk
Subject: Secunia Research: Microsoft Excel String Parsing
	Uninitialised Variable Vulnerability

====================================================================== 

                     Secunia Research 08/06/2010

                  - Microsoft Excel String Parsing -
               - Uninitialised Variable Vulnerability -

====================================================================== 
Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

====================================================================== 
1) Affected Software 

* Microsoft Excel 2002

NOTE: Other versions may also be affected.

====================================================================== 
2) Severity 

Rating: Highly critical
Impact: System compromise
Where:  Remote

====================================================================== 
3) Vendor's Description of Software 

"Microsoft Office Excel is a powerful tool you can use to create and
format spreadsheets, and analyze and share information to make more 
informed decisions.".

Product Link:
http://office.microsoft.com/excel

====================================================================== 
4) Description of Vulnerability

Secunia Research has discovered a vulnerability in Microsoft Excel, 
which can be exploited by malicious people to compromise a user's 
system.
 
The vulnerability is caused due to an uninitialised variable being 
used as size argument when copying data during parsing of certain 
record types. This can be exploited to corrupt memory via a specially
crafted file.

Successful exploitation may allow execution of arbitrary code.
 
====================================================================== 
5) Solution 

Apply patches from MS10-038.

====================================================================== 
6) Time Table 

21/12/2009 - Vendor notified.
21/12/2009 - Vendor response.
11/01/2010 - Status update requested.
12/01/2010 - Vendor provides status update.
12/04/2010 - Status update requested.
12/04/2010 - Vendor provides status update.
27/04/2010 - Vendor provides status update.
08/06/2010 - Public disclosure.

====================================================================== 
7) Credits 

Discovered by Carsten Eiram, Secunia Research.

====================================================================== 
8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2010-1252 for the vulnerability.

====================================================================== 
9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://secunia.com/advisories/business_solutions/

Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private 
individuals, who are interested in or concerned about IT-security.

http://secunia.com/advisories/

Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the 
security and reliability of software in general:

http://secunia.com/secunia_research/

Secunia regularly hires new skilled team members. Check the URL below
to see currently vacant positions:

http://secunia.com/corporate/jobs/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/advisories/mailing_lists/

====================================================================== 
10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2009-59/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

======================================================================

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