Re: Possible DoS flaw in ppp

Marijn Meijles (marijn@stack.nl)
Wed, 8 Apr 1998 13:07:04 +0200

You wrote:
> > Well, Linux can handle it, but sometimes the PPP link goes dead with all
> > these fragment overlapping exploits. It's highly erratic, so I can't give
> > much details, but it works upstream and downstream, resulting in possible
> > DoS attacks. There is nothing in the log files and when you kill pppd and
> > restart it, the link works again. Has anybody else experienced this? I run
> > 2.0.33.
>
> I've never seen this Linux<->Linux but I have reports of it Linux->TermServer
> and it appears some terminal servers while they dont crash do basically
> choke that port when processing weird frames. I have no good hard data
> however.
>
I'm talking about linux<->annex dial-in server. So maybe it's the annex. But
I fear this 'bug' is hard to catch.

> Can you duplicate this linux-linux, does compression and vj affect the
> behaviour.
I'll see if I have a nullmodem cable somewhere...

-- 
Marijn

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