Secunia Research: Microsoft Windows Wordpad Word 97 Converter Vulnerabilities

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                     Secunia Research 12/04/2011

   - Microsoft Windows Wordpad Word 97 Converter Vulnerabilities -

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Table of Contents

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

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1) Affected Software 

* Windows XP SP3
* Windows Server 2003 SP2

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Highly critical
Impact: System compromise
Where:  Remote

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3) Description of Vulnerability

Secunia Research has discovered two vulnerabilities in Microsoft 
Windows, which can be exploited by malicious people to compromise a
user's system.

The vulnerabilities are caused by array-indexing errors in the Word 97
converter (mswrd8.wpc / mswrd864.wpc) when parsing cell ranges 
supplied in sprmTTextFlow and sprmTSplit PRLs. This can be exploited 
to corrupt memory outside the bounds of an allocated array by tricking 
a user into opening a specially crafted Word 97 document using 
WordPad.

Successful exploitation may allow execution of arbitrary code.

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4) Solution 

Apply patches provided by MS11-033.

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5) Time Table 

08/10/2010 - Vendor notified.
08/10/2010 - Vendor response.
13/10/2010 - Vendor provides status update.
23/11/2010 - Vendor provides status update.
20/12/2010 - Vendor provides status update.
27/01/2011 - Vendor provides status update.
07/03/2011 - Vendor provides status update.
06/04/2011 - Vendor provides status update.
12/04/2011 - Public disclosure.

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6) Credits 

Discovered by Carsten Eiram, Secunia Research.

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7) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2011-0028 for the vulnerabilities.

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8) About Secunia

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9) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2011-33/

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

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