Microsoft Excel, part of the Microsoft Office product suite, is a spreadsheet application for Windows and Macintosh platforms.
A memory corruption vulnerability allows command execution when a user closes a spreadsheet file containing a specially crafted Qsir record.
Apply the patch referenced in Microsoft Security Bulletin 09-021.
Exploit works on Microsoft Excel 2007 SP1 and requires a user to open and then close the exploit file in Microsoft Excel.
There may be a delay before the exploit succeeds after the file is closed.
This exploit requires the IO::Uncompress and Compress::Zlib PERL modules.