I could not find an IPS signature for this yet. However, since this is a vulneraility in the Windows OS, not in a Symantec produc, I am afraid we may have to wait till the second tuesday of Sept, so that microsoft will release a secrity patch for this.
Microsoft has released a tool to take care of this vulnerabilty. It can be found in the link below:
http://support.microsoft.com/kb/2264107
Aniket