nanog mailing list archives
TCP-ACK vulnerability (was RE: SSH on the router)
From: Sean Donelan <sean () donelan com>
Date: Wed, 9 Jun 2004 15:15:42 -0400 (EDT)
On Mon, 7 Jun 2004, McBurnett, Jim wrote:
Aside from that, Use ACL's out the wazoo on the VTY lines and limit access to that to say 1 SSH enabled router or 1 IPSEC enabled router...
It doesn't really matter if you use SSH, Telnet or HTTP; if you can send evil packets to the router/switch and it falls over and dies. http://www.cisco.com/warp/public/707/cisco-sa-20040609-catos.shtml IP Permit Lists will not provide any mitigation against this vulnerability. The race is on, who will find your switches first?
Current thread:
- RE: SSH on the router - was( IT security people sleep well) McBurnett, Jim (Jun 07)
- TCP-ACK vulnerability (was RE: SSH on the router) Sean Donelan (Jun 09)
- Re: TCP-ACK vulnerability (was RE: SSH on the router) Stephen J. Wilcox (Jun 09)
- Re: UDP-TCP-ACK-SYN Attacks Pete (Jun 09)
- Re: TCP-ACK vulnerability (was RE: SSH on the router) Christopher L. Morrow (Jun 09)
- Re: TCP-ACK vulnerability (was RE: SSH on the router) Alexei Roudnev (Jun 09)
- Re: TCP-ACK vulnerability (was RE: SSH on the router) Sean Donelan (Jun 10)
- Re: TCP-ACK vulnerability (was RE: SSH on the router) Stephen J. Wilcox (Jun 10)
- Re: TCP-ACK vulnerability (was RE: SSH on the router) James (Jun 10)
- Re: TCP-ACK vulnerability (was RE: SSH on the router) Alexei Roudnev (Jun 10)
- Re: TCP-ACK vulnerability (was RE: SSH on the router) Stephen J. Wilcox (Jun 11)
- Re: TCP-ACK vulnerability (was RE: SSH on the router) Stephen J. Wilcox (Jun 09)
- TCP-ACK vulnerability (was RE: SSH on the router) Sean Donelan (Jun 09)
- Re: TCP-ACK vulnerability (was RE: SSH on the router) Christopher L. Morrow (Jun 10)