Microsoft .NET Framework 2.0 SP2 and 3.5.1 does not properly calculate the length of an unspecified buffer, which allows remote attackers to execute arbitrary code via (1) a crafted XAML browser application (aka XBAP), (2) a crafted ASP.NET application, or (3) a crafted .NET Framework application, aka ".NET Framework Heap Corruption Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14513
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-016