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RE: question regarding CAN-2004-0930
From: "Castigliola, Angelo" <ACastigliola () unumprovident com>
Date: Tue, 16 Nov 2004 11:34:59 -0500


The reason is that when you run the "dir" command Samba does the
processing and chokes. When you try the latter command "ls" Linux\Unix
processes the command and has no problems.

Angelo Castigliola III
Enterprise Security Architecture
UnumProvident
Telephone: 207-575-3820

-----Original Message-----
From: full-disclosure-admin () lists netsys com
[mailto:full-disclosure-admin () lists netsys com] On Behalf Of evilninja
Sent: Tuesday, November 16, 2004 9:17 AM
To: full-disclosure () lists netsys com
Cc: security () samba org
Subject: [Full-disclosure] question regarding CAN-2004-0930

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hi,

don't know if this is the right place to ask, but here it goes:

i was notified by one of my users (!) about the recent samba
vulnerability (CAN-2004-0930 [1]) that this is indeed easily
"exploitable" by just issuing commands with long wildcard-patterns in
the filename part, just as:

<smb-share>:\> dir ******.exe

ok, my smbd went crazy and the "dir" command was waiting for the result.
but: when i mounted the smb-share under linux (mount -t smbfs ....) and
issuing

$ ls /mnt/smb-share/*******.exe

"ls" returned *instantly* with "No such file or directory" and smbd did
not go crazy. now i ask myself: how comes?

thank you for comments,
Christian.

[1] http://samba.iasi.roedu.net/samba/security/CAN-2004-0930.html
- --
BOFH excuse #120:

we just switched to FDDI.
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_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html


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