RE: Securing Printers
From: Dante Mercurio (Dante_at_webcti.com)
Date: Wed, 17 Nov 2004 10:54:57 -0500 To: "Dubber, Drew B" <firstname.lastname@example.org>, "sec-basic list" <email@example.com>
To add, I ran into a large copier/printer during an audit that had a web
server that stored a number of past documents. Anyone with access to the
web console could see the documents in the web console and reprint it
irregardless of who originally owned it. Since this was a payroll
printer there was an issue with confidentiality.
What I haven't heard in your question or asked is why would you want the
printer to be public? What are you trying to accomplish?
M. Dante Mercurio, CISSP, CWNA, Security+
From: Dubber, Drew B [mailto:firstname.lastname@example.org]
Sent: Tuesday, November 16, 2004 5:31 PM
To: sec-basic list
Subject: RE: Securing Printers
Apologies if this has been said before but nowadays printers come with a
lot more. For instance, there is normally a small web server on printers
to configure the settings such as IP address etc. Now I'm struggling to
remember the details but there was at least one printer with the web
server full of holes that it could have easily been compromised from an
outside source and potentially used as a gateway to get into something
more interesting. Think of what someone could achieve if there were a
printer pooling/re-direction option - all prints on that printer going
to a third party?!
From: Zurt [mailto:email@example.com]
Sent: 16 November 2004 21:23
Cc: sec-basic list
Subject: Re: Securing Printers
Ed Donahue wrote:
> The most immediate to me is a denial of service on the printer;
> filling it's memory with jobs so that no one else could get in the
> queue (or creating a single job that has so many pages that no one
> else will be able to get in). Furthermore, high-capacity printers can
> burn through a decent amount of paper and toner, costing companies
> money and inconvenience.
> I probably wouldn't be amused to find my printer used and abused.
> Another arguement is basic network security. Because it's not
> vulnerable isn't really a good reason to leave it open to the
> internet; it goes against the most basic concepts of security: You
> only allow what you need. Anything else can be a leak of information
> or a point to breach.
> On Nov 15, 2004, at 09:18, Bryce Embry wrote:
>> A recent thread on BugTraq, along with some discussions with my
>> colleagues, has me curious about printer security. What dangers are
>> there in giving a printer a public IP address?
>> To me, a printer with a public IP sounds utterly foolish, but I'm not
>> doing a very good job of making this point with my colleagues. They
>> usually respond with the question "Why would anyone want to print
>> something to a printer they can't even find?". My answers (usually
>> "Why not?" or "it's a system running an OS that is subject to
>> exploitation") don't seem to be very convincing, especially since I
>> can't produce any known exploits. I would appreciate any arguments
>> and reasoning that would carry more weight, or enlightenment to help
>> me stop being so paranoid.
If the printer is running an OS wouldn't be possible to forward the
printed jobs to an intruder?? Some documents could be confidential...
-- _____ Zurt