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Thread: Problem cracking WEP with no client

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  1. #1
    Just burned his ISO
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    Default Problem cracking WEP with no client

    I followed the tutorial on the airckack-ng site for cracking a WEP with no client. I got the password in hex. Tried to use it to log onto my dummy AP and Wicd says it is a bad password (made sure I set password to hex in Wicd). Since it is in hex I don't know if it's right or not. Can Aircrack return the wrong password? Or, is it a bug in Wicd? I was able to log onto my regular AP with Wicd and got no password error.

  2. #2
    Just burned his ISO
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    Default Re: Problem cracking WEP with no client

    aircrack will check against the packet dump provided. did you remove the colons?

    for example:
    KEY FOUND! 100% Accuracy [11:22:33:44:55]
    key: 1122334455

    also make sure if you are copy/pasting that there is no white space before or after the key

    you can try to connect via console:

    iwconfig <interface> essid <essid>
    iwconfig <interface> key <key>
    dhclient <interface>
    Last edited by leetbean; 06-03-2011 at 07:47 PM.

  3. #3
    Senior Member cgelici's Avatar
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    Default Re: Problem cracking WEP with no client

    Why don't you try cracking your regular AP ? Just set a temporary WEP key and crack it, then change it back.

  4. #4
    Good friend of the forums comaX's Avatar
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    Default Re: Problem cracking WEP with no client

    This sounds like a mac adress filtering to me... Are you sure you're trying to crack your own dummy AP ?
    Running both KDE and GNOME BT5 flawlessly. Thank you !

  5. #5
    Senior Member cgelici's Avatar
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    Default Re: Problem cracking WEP with no client

    Quote Originally Posted by comaX View Post
    This sounds like a mac adress filtering to me... Are you sure you're trying to crack your own dummy AP ?
    comaX, you know what's funny ? Here in Holland the courthouse has decided it is NOT illegal to crack your neighbour's wifi !

  6. #6
    Junior Member 5cardcharlie's Avatar
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    Default Re: Problem cracking WEP with no client

    comaX, why would that sound like mac filtering? If that were the case he wouldn't have been able to inject packets in the first place without spoofing the correct mac, in which case he'd obviously know it.

  7. #7
    Good friend of the forums comaX's Avatar
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    Default Re: Problem cracking WEP with no client

    Quote Originally Posted by cgelici View Post
    comaX, you know what's funny ? Here in Holland the courthouse has decided it is NOT illegal to crack your neighbour's wifi !
    We don't know where OP comes from though, and it's mostly illegal, prettu much everywhere...

    Quote Originally Posted by 5cardcharlie View Post
    comaX, why would that sound like mac filtering? If that were the case he wouldn't have been able to inject packets in the first place without spoofing the correct mac, in which case he'd obviously know it.
    Well, that sounds about right, even though I would need to check that*. He may have forgotten to spoof it when trying to connect afterwards...
    And if it's not mac filtering, then it's just a bad password, or a bug. In either case, we would need more info about what is being done.

    (I think the chop chop or fragmentation attack doesn't require you to be authed, and AP will respond anyway, mac filtering or not. I'm not sure though...)
    Running both KDE and GNOME BT5 flawlessly. Thank you !

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    Default Re: Problem cracking WEP with no client

    In order to perform successful chop-chop attack you must do fake authentication
    Scientia ac Labore

  9. #9
    Good friend of the forums comaX's Avatar
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    Default Re: Problem cracking WEP with no client

    Maybe the fragmentation then. Once again, I don't remember !
    OP seems to have disappeared, so I'll guess we'll know more when he comes back !
    Last edited by comaX; 06-04-2011 at 01:01 PM.
    Running both KDE and GNOME BT5 flawlessly. Thank you !

  10. #10
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    Default Re: Problem cracking WEP with no client

    Quote Originally Posted by comaX View Post
    Maybe the fragmentation then. Once again, I don't remember !
    OP seems to have disappeared, so I'll guess we'll know more when he comes back !
    typically an AP will discard any packets from a MAC not on their approved list if MAC address filtering is enabled. you could run a fragmentation attack against a client but in the OP's case there are no clients.

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