Microsoft .NET Framework 1.1 SP1 2.0 SP2 3.0 SP2 3.5 3.5.1 4 4.5 4.5.1 and 4.5.2 does not properly use a hash table for request data which allows remote attackers to cause a denial of service (resource consumption and ASP.NET performance degradation) via crafted requests aka \.NET Framework Denial of Service Vulnerability.\