Berkeley CSUA MOTD:Entry 12473
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2018/12/12 [General] UID:1000 Activity:popular
12/12   

2004/3/1-2 [Computer/SW/Security] UID:12473 Activity:low
3/1     Another WiFi question:  If there was an ESS network, and there were
        areas that got signal from only a few APs, couldn't you mount a DoS
        attack on a client by forging their MAC and sending lots of forged
        reassociation messages to an AP they can't get signal from?
        \_ Of course.
           \_ So doesn't this throw cold water on any large ESS network without
              strong authentication?  You can break the access of anyone you've
              been in range of.
              \_ Even if there is strong authentication, you can break the
                 access of anyone.  It's called "jamming," and it's true of
                 every form of wireless communication.  -tom
                 \_ But jamming breaks the access of everyone over a specific
                    area.  Spoofed reassociation breaks access for specific
                    victims across the entire ESS network.
                    \_ so what?  Don't you have better things to do than
                       worry about DOS on wireless networks?  It's trivially
                       easy to do, but it's not a significant problem in
                       the real world.  Why would anyone bother?  -tom
                       \_ Do you work for MS's security division?
                       \_ I was just thinking about sfwireless and some big
                          community networks and bad people.  I know wireless
                          has security problems, and was just exploring a
                          single potential problem
                          \_ you can stop thinking now, you don't seem to be
                             very good at it.  -tom
        \_ This also works on wired networks, modulo arp spoofing.  What's
           your point? -dans
           \_ He's trying to learn.  Why are you and tom being such assholes
              to him?  And then everyone wonders why so few people want to
              attend csua social functions, hang out on wall, or post anon to
              the motd.  Actually I know why tom is being an asshole.  What
              exactly is your beef with the guy?
              \_ He's not trying to learn.  He's trying to show us how
                 clever he is.  -tom
                 \_ considering no one "knows" who he is, there's not much
                    point in strutting his stuff. i think he really is just
                    somewhat amazed at how fallible some things in the real
                    world are, and i think you're just being an asshole.
              \_ Huh? How was he being an asshole? tom's "not good at thinking"
                 was the only thing, which is pretty tame for the motd.
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