Unspecified vulnerability in the TrueType font parsing engine in win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote attackers to execute arbitrary code via crafted font data in a Word document or web page, as exploited in the wild in November 2011 by Duqu, aka "TrueType Font Parsing Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15645
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15290
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13998
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-039
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-034
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-087
http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-291-01E.pdf
http://www.us-cert.gov/cas/techalerts/TA12-164A.html
http://www.us-cert.gov/cas/techalerts/TA12-129A.html
http://www.us-cert.gov/cas/techalerts/TA11-347A.html
http://www.symantec.com/connect/w32-duqu_status-updates_installer-zero-day-exploit
http://www.securitytracker.com/id?1027039
http://www.securelist.com/en/blog/208193197/The_Mystery_of_Duqu_Part_Two
http://technet.microsoft.com/security/advisory/2639658
http://secunia.com/advisories/49122
http://secunia.com/advisories/49121
http://isc.sans.edu/diary/Duqu+Mitigation/11950
http://blogs.technet.com/b/msrc/archive/2011/11/03/microsoft-releases-security-advisory-2639658.aspx