afd.sys in the Ancillary Function Driver in Microsoft Windows Server 2003 SP2 does not properly validate user-mode input passed to kernel mode, which allows local users to gain privileges via a crafted application, aka "Ancillary Function Driver Elevation of Privilege Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14958
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-009