Microsoft Office Publisher 2007 SP1 does not properly calculate object handler data for Publisher files, which allows remote attackers to execute arbitrary code via a crafted file in a legacy format that triggers memory corruption, aka "Pointer Dereference Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6285
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-030
http://www.vupen.com/english/advisories/2009/1888
http://www.us-cert.gov/cas/techalerts/TA09-195A.html
http://www.securitytracker.com/id?1022546