Crashing Win9x with smbclient

[budmeister1 () JUNO COM (Bud Meister)]

Hi everyone,

I'm an assistant in a high school computer lab with about
25 Win9x workstations and a Linux server. All the stations
have a shared "My Documents" directory, so students can
save their work locally and still be able to access it from
other workstations. The Linux server is really only there
for my own personal use, not as a student fileserver
(hence the shares).

After reading the thread about the 'con\con' bug, I decided
to do a little experimenting. Here's what I found
(displayed information is skewed):

--------------------
[neo@neo ~]$ smbclient '\\station-1\my documents'
Password:

smb:\> ls
  Sarah1.doc     358739857   48574
  JoePic.jpg       7634733     873

smb:\> cd con\con
*disconnect*

[neo@neo ~]$
--------------------

After I attempted the change directory command, Station-1 bluescreened
immediately. I repeated this process on 5 other workstations, and all
bluescreened; some were recoverable (but too unstable to continue without
a reboot), but most had to be rebooted.

This bug probably won't have any affect on our network, since we're
running
IP masquerading on our router and nothing can come in. The only way I've
exploited it remotely is by using smbclient on a Windows machine (my
Linux box is the only one in the school).

As for larger effects, I couldn't say. That's why I mentioned it here :)
I realize this is somewhat of an old problem, and this technique may
have already been discovered, but I'm curious to see what others have
to say on this topic.

----->Buddy
budmeister1 () juno com
http://tenbux.iwarp.com/

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