Full Disclosure mailing list archives

Possible DOS issue in OpenSSH ssh client

From: Espen Grøndahl <espen () espen mine nu>
Date: Tue, 13 Jun 2006 21:29:46 +0200

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

I didnt 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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Current thread:

Possible DOS issue in OpenSSH ssh client Espen Grøndahl (Jun 13)
- Re: Possible DOS issue in OpenSSH ssh client Paul Schmehl (Jun 13)
- Re: Possible DOS issue in OpenSSH ssh client kaosone (Jun 13)
- <Possible follow-ups>
- Possible DOS issue in OpenSSH ssh client Espen Grøndahl (Jun 13)