Microsoft Office Excel 2002 SP3, 2003 SP3, and 2007 SP1 and SP2; Office 2004 and 2008 for Mac; Open XML File Format Converter for Mac; Office Excel Viewer 2003 SP3; Office Excel Viewer SP1 and SP2; and Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allows remote attackers to execute arbitrary code via a spreadsheet with a FEATHEADER record containing an invalid cbHdrData size element that affects a pointer offset, aka "Excel Featheader Record Memory Corruption Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-067
https://www.fireeye.com/blog/threat-research/2014/09/darwins-favorite-apt-group-2.html
https://www.trendmicro.de/cloud-content/us/pdfs/security-intelligence/white-papers/wp_ixeshe.pdf
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-3129
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6521
http://www.securitytracker.com/id?1023157
http://www.securityfocus.com/bid/36945
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=832
http://archives.neohapsis.com/archives/bugtraq/2009-11/0080.html