PUBCONV.DLL in Microsoft Office Publisher 2007 does not properly clear memory when transferring data from disk to memory, which allows user-assisted remote attackers to execute arbitrary code via a malformed .pub page via a certain negative value, which bypasses a sanitization procedure that initializes critical pointers to NULL, aka the "Publisher Invalid Memory Reference Vulnerability".
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1871
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-037
http://www.vupen.com/english/advisories/2007/2479
http://www.us-cert.gov/cas/techalerts/TA07-191A.html
http://www.securitytracker.com/id?1018353
http://www.securityfocus.com/archive/1/473309/100/0/threaded
http://secunia.com/advisories/25988
http://research.eeye.com/html/advisories/published/AD20070710.html
http://archive.cert.uni-stuttgart.de/bugtraq/2007/07/msg00254.html