Re: Re: Cisco VPN Concentrator IKE resource exhaustion DoS Advisory
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/sw/iosswrel/ps5207/products_feature_guide09186a0080229125.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?