RE: Re: Cisco IOS Denial of Service that affects most Cisco IOS routers- requires power cycle to recover

[Cedric Blancher <blancher () cartel-securite fr>]

Le mer 23/07/2003 à 19:43, lee.e.rian () census gov a écrit :
> So... has anyone been able to verify that the problem occurs when the TTL
> expires without the packet being addressed to the router?  Or is it a
> requirement that the evil packet be addressed to the router?

I checked this and it appears packets have to be addressed to target
router. Transit evil packets which TTL would expire on a router won't
affect it.

My tests were performed using Scapy to generate following packets :

        IP proto set to vulnerable ones
        TTL set to expire on target router
        IP payload set to 26 "X"


-- 
http://www.netexit.com/~sid/
PGP KeyID: 157E98EE FingerPrint: FA62226DA9E72FA8AECAA240008B480E157E98EE
_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html