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

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

From: blancher at cartel-securite.fr (Cedric Blancher)
Subject: Re: Cisco IOS Denial of Service  that
	affects most Cisco IOS routers- requires power cycle to recover

Le mer 23/07/2003 ? 19:43, lee.e.rian@...sus.gov a ?crit :
> 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