[EMAIL PROTECTED] wrote:
> Hi!
> 
> Yesterday, I experienced strange behaviour with Firefox. I was sending
> two files via Gajim to a friend, for which Gajim was listening on port
> 3000. After that, I surfed on YouTube. After a short while, I wanted to
> send a third file, but this time, Gajim told me that port 3000 is
> already in use. I was confused and thought that maybe Gajim didn't close
> it correctly. Therefore I did a netstat -an which showed that the port
> was really in use (but no connection to it IIRC). Then I did lsof and
> saw that the port was used by Firefox. So Firefox opened the port just
> in the 5 minutes where I wasn't sending a file. And the strange thing is
> that it listened port 3000, one of the few ports routed to the outside
> world, which was in use 5 minutes before by Gajim.
> Stupid as I was, I instantly closed Firefox instead of taking the network
> cable out and connecting to port 3000 via telnet. After I closed Firefox,
> the port was closed again. I closed it the normal way, which means I just
> closed the two tabs.
> Now I'm wondering: Is there anything that could cause this behaviour? Or
> is my system definitely compromised and I should reinstall it?
> 
> The versions I use are:
> Firefox: 2.0.0.4
> libjpeg: 6b-1
> zlib: 1.2.3
> expat: 2.0.1
> libtiff: 3.8.2
> libxml2: 2.6.29
> libpng: 1.2.18
> libxslt: 1.120
> Flash: Don't know how to look it up. It's either 9 Beta or 9 Final.
> Anyway, the MD5 hash of the plugin is 0273c3d183c8665f21175896ae4d1b4e if
> that helps.
> 
> TIA,
> Jonathan

I doubt Firefox would be compromised in such a manner, Seeing you are 
running a *nix based system. Compromise wouldn't necessarily be shown as 
a port in use by Firefox, A port may or may not even show up, Depending 
on the shellcode used in compromise.
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