Re: [security] Big problem on 2.0.x? (fwd)

Andrea Arcangeli (andrea@suse.de)
Fri, 17 Dec 1999 15:09:02 +0100 (CET)


On Fri, 17 Dec 1999, Alan Cox wrote:

>> Hmm, so you say it was the 2.0.x NFS client that SYN flooded the NFS
>> server. Ok, thanks for the clarification.
>
>The 2.0 NFS client is UDP only. So it wasnt that.

`mount` uses _TCP_ (and mountd sits at an address at around 6xx here). So
a mount bug/loop may explain some kind of flood. Dan can be _right_ saying
"it was all me".

Anyway this doesn't seems a 2.0.x security issue but a mount/mountd
userspace problem if something. So I only suggest to upgrade `mount` as
first thing and the nfs server (rpc.mountd mainly) as second thing, and
also the kernel if 2.0.x still doesn't work stable for you.

Andrea

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