Cisco recommends a workaround which essentially sets a limit on the number of outstanding SA's and drops new SA requests if they exceed that limit (outlined in http://www.cisco.com/en/US/products/...080229125.html)

It seems to me that this will not accomplish much - presumably the determined attacker will simply continue to send packets - as soon as the number of SA'ss drops below that limit the attacker will simply fill up the queue again. Am I missing something about the vulnerability or the supposed fix from Cisco?