Detecting new Windows .jpeg exploit

This is regarding the exploit in Microsoft's .jpeg handling code, posted
here: http://secunia.com/advisories/12528/.
 
What I'd like to know is how we can scan a fairly large network for
vulnerable machines.  Microsoft provided a tool to detect if your own
computer needs to be patched, but running this on potentially thousands of
systems isn't really an option.  Is there any way known at this time to
detect if a computer is vulnerable?
 
Thanks,

Ron Bowes

Information Protection Center
Government of Manitoba


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