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Re: SECURITY: NFS Vulnerability

daemon@ATHENA.MIT.EDU (Dane Jasper)
Mon Mar 13 00:39:36 1995

Date: Sun, 12 Mar 95 18:17 PST
From: dane@sonic.net (Dane Jasper)
To: linux-security@tarsier.cv.nrao.edu
Reply-To: linux-security@tarsier.cv.nrao.edu

In article <JUPHOFF.95Mar12123801@tarsier.cv.nrao.edu> you wrote:

: The current Linux NFS server (version 2.0) has a couple of security problems
: some of which have been known for a while and supposedly been fixed a long
: time ago.  However, none of the versions I found on the usual FTP sites had
: these fixes incorporated.

I have annother security problem with NFS - but a minor one.  Users can
cause denial of service attacks by locking up NFS servers that they have
access to..

mount -t nfs server.edu:/exports/goodies /mnt
mkdir /mnt/another_mountpoint
mount -t nfs server.edu:/exports/goodies /mnt/another_mountpoint
ll /mnt/another_mountpoint

Because NFS is not multithreaded, I think this will fail..   Let me know if
I'm barking up the wrong tree - I get the digest, so I'll see responses.

Can we make NFS multithreaded?

Dane

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