bugtraq - Re: Re: Cisco VPN Concentrator IKE resource exhaustion DoS Advisory

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20060807222413.13035.qmail@securityfocus.com>
Date: 7 Aug 2006 22:24:13 -0000
From: henry.sieff@...il.com
To: bugtraq@...urityfocus.com
Subject: 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?