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T-003: Vulnerabilities in Microsoft Excel

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Special Forums Cybersecurity Security Advisories (RSS) T-003: Vulnerabilities in Microsoft Excel
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Old 11-13-2008
T-003: Vulnerabilities in Microsoft Excel
Several remote code execution vulnerabilities exist in the way Microsoft Excel: 1) processes a VBA Performance Cache; 2) an improper memory allocationwhenloading Excel objects; and 3) a formula parsing vulnerability when parsing Microsoft Excel documents containing a specially crafted formula embedded inside a cell. The risk is MEDIUM. An attacker who successfully exploited this vulnerability could take complete control of an affected system.


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excel::writer::xlsx::package::xmlwritersimple

Excel::Writer::XLSX::Package::XMLwriterSimple(3pm)	User Contributed Perl Documentation	Excel::Writer::XLSX::Package::XMLwriterSimple(3pm)

NAME

       XMLwriterSimple - Light weight re-implementation of XML::Writer.

       This module is used internally by Excel::Writer::XLSX.

DESCRIPTION

       This module is used by Excel::Writer::XLSX for writing XML documents. It is a light weight re-implementation of XML::Writer.

       XMLwriterSimple is approximately twice as fast as XML::Writer. This speed is achieved at the expense of error and correctness checking. In
       addition not all of the XML::Writer methods are implemented. As such, XMLwriterSimple is not recommended for use outside of
       Excel::Writer::XLSX.

       If required XMLwriterSimple can be overridden and XML::Writer can be used in its place by setting an "_EXCEL_WRITER_XLSX_USE_XML_WRITER"
       environmental variable:

	   export _EXCEL_WRITER_XLSX_USE_XML_WRITER=1
	   perl example.pl

	   Or for one off programs:

	   _EXCEL_WRITER_XLSX_USE_XML_WRITER=1 perl example.pl

       This technique is used for verifying the test suite with both XMLwriterSimple and XML::Writer:

	   _EXCEL_WRITER_XLSX_USE_XML_WRITER=1 prove -l -r t

SEE ALSO

       XML::Writer.

AUTHOR

       John McNamara jmcnamara@cpan.org

COPYRIGHT

       X MM-MMXII, John McNamara.

       All Rights Reserved. This module is free software. It may be used, redistributed and/or modified under the same terms as Perl itself.

LICENSE

       Either the Perl Artistic Licence <http://dev.perl.org/licenses/artistic.html> or the GPL
       <http://www.opensource.org/licenses/gpl-license.php>.

DISCLAIMER OF WARRANTY

       See the documentation for Excel::Writer::XLSX.

perl v5.10.1							    2012-04-02			Excel::Writer::XLSX::Package::XMLwriterSimple(3pm)