This indicates an attack attempt to exploit a Denial of Service vulnerability in Microsoft Internet Explorer.
The vulnerability is located in the "NMSA.ASFSourceMediaDescription.1" ActiveX control through misuse of the "dispValue" property. It may allow remote attackers to crash the application using the affected ActiveX control.
Microsoft Internet Explorer 6.0 SP1
Microsoft Internet Explorer 6.0
Denial of Service: Remote attackers can crash vulnerable systems.
Currently we are not aware of any official patch for this issue.