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<title>sane-devel: Re: saned - Problem found</title>
<h1>Re: saned - Problem found</h1>
<a href="mailto:becka@rz.uni-duesseldorf.de"><i>becka@rz.uni-duesseldorf.de</i></a><br>
<i>Thu, 8 Oct 1998 17:23:44 +0200 (MET DST)</i>
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Hi !<br>
<p>
<i>&gt; Added both read and write for every one, changed the line in inet.conf</i><br>
<i>&gt; back to nobody.nobody, and all works well.</i><br>
<p>
Hmm - this isn't a very good solution, but ...<br>
<p>
<i>&gt; So, prehaps there should be a note in the man page for saned that on a Red</i><br>
<i>&gt; Hat 4.2 box, the permissions on the scsi divice will need to be changed.</i><br>
<i>&gt; </i><br>
<i>&gt; Note, the only scsi device I have at this point is the scanner, if one</i><br>
<i>&gt; also has disks, then I do not know what security ramifications this might</i><br>
<i>&gt; have.</i><br>
<p>
Hmm - well this isn't good. Not even for single device. It depends on how well<br>
the device in question is designed.<br>
<p>
The point is, that you don't need to be afraid of someone accessing other <br>
devices (except if the hardware in question is a very weird thing that can<br>
initiate transfers), but that you can do about anything to the "open"<br>
device that is exposed by the world-rw-able /dev/sg?.<br>
<p>
This can cause the device to do about anything, sometimes (with bad devices)<br>
even things it shouldn't do, like crash, lock the bus, damage its hardware<br>
(yes, this is possible, if you know the device well - Mustek scanners can<br>
push the slider too far, many devices can have their firmware reprogrammed,<br>
so guess what happens if you write garbage in there ...), etc. ...<br>
<p>
CU,Andy<br>
<p>
<pre>
--
Andreas Beck | Email : &lt;<a href="mailto:Andreas.Beck@ggi-project.org">Andreas.Beck@ggi-project.org</a>&gt;
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<li> <b>Next message:</b> <a href="0114.html">Tobias Ernst: "Re: OS/2 ant sane 0.74"</a>
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