Re: [Full-disclosure] Zotob Worm Remover

From: Stuart Low (stuart_at_serverpeak.com)
Date: 08/22/05

  • Next message: Valdis.Kletnieks_at_vt.edu: "Re: [Full-disclosure] Zotob Worm Remover" 
    To: full-disclosure@lists.grok.org.uk
Date: Tue, 23 Aug 2005 07:45:10 +1000

    I'm just going to be facetious here and say "What's Zotob"?

    Seriously, you can have all the arguments you want about how worm X
    infection rate is increased due to whatever reason but as J Tucker
    pointed out it's the software that's the issue.

    As for us *shrugs*, we don't suffer the plight of worms. I guess that's
    the advantage of running a 100% Linux shop.

    Stu

    On Mon, 2005-08-22 at 22:08 +0100, James Tucker wrote:
    > It seems to me that the attack was less than a week old from the start
    > date. Default settings on a relatively unchanged box would provide a
    > suitable window of opportunity given the availability of the worm to the
    > deployer. This is more important than network connectivity, which is not
    > of security concern as this is not the exploited layer. Disconnecting
    > networks is what you suggest when you're in trouble, not when you're
    > trying to maintain the daily balance of cost vs function. Moreover,
    > wireless is recieving the blame - however this will only continue whilst
    > your laptop is the device you are using. Eventually will you blame the
    > mobile phone companies for allowing "dangerous traffic" to flow through
    > the repeaters? What about sattelite links - should we filter those and
    > knock the latency up another notch? No, it's the software, once again.
    > Connectivity increases exposure, it doesn't decrease security - the two
    > are not one and the same. 1000 laptops in a city centre network becoming
    > infected less than a week from update release would be unsuprising
    > (read: defaults are once a week at 3). The security of these laptops was
    > not compromised by the wireless presence, it was a medium of travel
    > only. Now lets say, we go back in time and remove all of the wireless
    > NIC's. Now, there are only 750 laptops cause we can't generate as much
    > revenue (joke), and of these they're all still connected, just with a
    > different medium. The medium is (specification)centralised and routable
    > in the same manner (ah, so the medium can have 'implications' ;) - the
    > infection rate is the same. Why? because they are all connected. It's
    > BEING CONNECTED not BEING WIRELESS that's the issue here. Yes you may
    > argue, pointlessly however, that wireless has increased average
    > connectivity, however once again, this is only a medium. It's
    > business/personal drive that requires connectedness, not the technology
    > itself.
    >
    > Todd Towles wrote:
    > > This is correct for the first day, maybe two. Then unpatched laptops
    > > leave the corporate network, hit the internet outside the firewall and
    > > then bring the worm back right to the heart of the network the very next
    > > day, bypassing the firewall all together. Firewall is just one step..it
    > > isn't a solve all. Patching would be the only way to stop this threat in
    > > all vectors. That was my point.
    > >
    > > If you aren't blocking 445 on the border of your network, you have must
    > > worse problems with Zotob.
    > >
    > >
    > >>-----Original Message-----
    > >>From: Ron DuFresne [mailto:dufresne@winternet.com]
    > >>Sent: Monday, August 22, 2005 3:15 PM
    > >>To: Todd Towles
    > >>Cc: n3td3v; full-disclosure@lists.grok.org.uk
    > >>Subject: RE: [Full-disclosure] Zotob Worm Remover
    > >>
    > >>On Mon, 22 Aug 2005, Todd Towles wrote:
    > >>
    > >>
    > >>>Wireless really isn't a issue. You can get a worm from a
    > >>
    > >>cat 5 as easy
    > >>
    > >>>as you can from wireless. The problem was they weren't patched. Why
    > >>>weren't they patched? Perhaps Change policy slowed them
    > >>
    > >>down, perhaps
    > >>
    > >>>it was the fear of broken programs..perhaps it was the QA group..it
    > >>>doesn't really matter. They go the worm because they were
    > >>
    > >>not patched.
    > >>
    > >>And because they didn't properly filter port 445 is my understanding.
    > >>Unpatched systems behind FW's that fliter 445 were untouched.
    > >>
    > >>Thanks,
    > >>
    > >>Ron DuFresne
    > >>--
    > >>"Sometimes you get the blues because your baby leaves you.
    > >>Sometimes you get'em 'cause she comes back." --B.B. King
    > >> ***testing, only testing, and damn good at it too!***
    > >>
    > >>OK, so you're a Ph.D. Just don't touch anything.
    > >>
    > >>
    > >>
    > >
    > > _______________________________________________
    > > Full-Disclosure - We believe in it.
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    > _______________________________________________
    > Full-Disclosure - We believe in it.
    > Charter: http://lists.grok.org.uk/full-disclosure-charter.html
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