Hello Craig, A "fax machine" usually consists of an image scanner, a modem, and
a printer combined into a single package.
I seam to remember back in the late 90s, there was a way to gain tech support
remote access to the modem via the Hayes Modem AT strings. It was something
similar to the &T command. Maybe it twas &T2
&Tn - Test and diagnostics; 0=End current test; 1=Start local analog loop back
test; 2=Unknown; 3=Start local digital loop back test 4=Grant remote request
for remote digital loop back test; 5=Deny remote request for remote digital
loop back test; 6=Start remote digital loop back test; 7=Start remote digital
loop back test with self-test; 8=Start local analog loop back test with
self-test.
Take Care and Have Fun --John
-------------- Original message ----------------------
From: "Craig Wright" <Craig.Wright@bdo.com.au>
As for point 1 - what is there to try. A fax is not a modem. There is no
known (even in theory) attack against a fax to gain access.
Regards,
Craig Wright (GSE-Compliance)
Craig Wright
Manager of Information Systems
Direct : +61 2 9286 5497
Craig.Wright@bdo.com.au
+61 417 683 914
BDO Kendalls (NSW)
Level 19, 2 Market Street Sydney NSW 2000
GPO BOX 2551 Sydney NSW 2001
Fax +61 2 9993 9497
www.bdo.com.au
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-----Original Message-----
From: listbounce@securityfocus.com [mailto:listbounce@securityfocus.com]
On Behalf Of jfvanmeter@comcast.net
Sent: Tuesday, 30 October 2007 3:21 AM
To: rohnskii@gmail.com; security-basics@securityfocus.com
Subject: Re: Vulnerability testing in analog modem
I had a similar pen test, it was on a xerox docucentra, I had several
concerns with the multifunction printer
1. there was/is no auditing of the fax connection, so I could try and
try and no one would never know about the attack.
2. the printer also had a web server, so I copied some test file to the
hd and set up my very own web site.
i believe it is possible to break out of the modem connection, via some
type of diagnotic route and get access to the network.
I recommend that to my client that they configure the phone jack for
outgoing calls only., turn off the web server, set passwords, etc.
I would be interested in hearing anyones thoughts about this. I have a
test coming up for a client on a multi function printer
Take Care and Have Fun --John
-------------- Original message ----------------------
From: rohnskii@gmail.com
I don't know about connecting through the fax to the network but there
is
another security concern to think about.
Fax machines, and printers, that have an internal HD for document
storage can be
a security concern. When the machine is sent out for servicing or
retired there
may be retrievable document images with confidential information on
them.
