full-disclosure - Possible DOS issue in OpenSSH ssh client

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Date: Wed Jun 14 03:17:41 2006
From: espen at espen.mine.nu (Espen Grøndahl)
Subject: Possible DOS issue in OpenSSH ssh client

The client did just hang ? I don?t know for how long, but I sent a break
after an hour :-)

I didn?t have the time to test this issue more.

kaosone wrote:

>> This could be used in a denial of service attack ? or could be used to
stop
>> ( or at least annoy ) ssh bruteforcers J
>> 
> 
>no, the bruteforcers don't use ssh, but other programs that can be not
>affected by this

It is good to see that someone knows ?all? the bruteforcers :-) ( could you
please ask them to stop 
 )

I do not know if this issue affects Hydra, Guess-who and so on.

I have only tested this issue with OpenSSH client and putty.

Putty seems to be less affected ( cpu usage 25-40% ).

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