eric@lucii.org on Mon, 1 Apr 2002 17:20:14 +0200


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Re: [PLUG] weak linux firewall?


On Mon, Apr 01, 2002 at 09:54:26AM -0500, Samantha Samuel wrote:
> For reasons that are not important I have win2k on a partition. My 
> firewall is a linux box that has only the following ports open.
> 
> Port       State       Service
> 21/tcp     open        ftp
> 22/tcp     open        ssh
> 80/tcp     open        http
> 139/tcp    open        netbios-ssn
> 515/tcp    open        printer
> 6000/tcp   open        X11
> 6004/tcp   open        X11:4
> 
> When surfing the internet last night, I saw an ad that claimed my pc was 
> insecure and had a snapshot of my hd, that had a pic of my folders and the 
> size of my partition. Now this worries me. I know it was a pic of my comp, 
> and not some generic pc because of this one folder I had.
> 
> Does anyone have any thoughts on how someone could have gotten past the 
> firewall and peeked into my machine?
> 
> Thanks.
> -- 
> Samantha
> -------

Samantha:

Are you saying that you were browsing using I.E. running on Windows 2000
operating system?  Is the Linux firewall on a separate computer?

Based on those assumptions, I'd say that they "got past" the firewall
by using vulnerabilities in the browser.  

There is also a scam where they show you a page and it's got your 
files on it... turns out the url for that page is like this:
   file:///c:/
This will (on a windows machine of course) show you your files but 
this does not mean that anybody else can see them.

Eric

-- 
#   Eric Allan Lucas 
# "Oh, I have slipped the surly bond of earth
#  And danced the skies on laughter-silvered wings..
#              -- John Gillespie Magee Jr.

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