Re: Linux 2.4.27 SECURITY BUG - TCP Local and REMOTE(verified) Denial of Service Attack

Petri Kaukasoina
2004-09-12T16:48:00Z

On Sun, Sep 12, 2004 at 09:45:38AM -0600, Wolfpaw - Dale Corse wrote:
> No problem :) I run the following, against SSH as the target, and I
> can also kill it. (using telnet as the other side of the attack)
>
> root@maximus:/home/admin# telnet XXXXXXXXXXXXXXX 22
> Trying XXXXXXXXXXXXXX...
> Connected to XXXXXXXXXXXXXXXXX.
> Escape character is '^]'.
> Connection closed by foreign host.
> root@maximus:/home/admin#

> Now.. Do you really want me to post the source code for it?

With default sshd_config you can DOS sshd trivially by opening ten
connections using ten times "telnet XXXXXXXXXXXXXXX 22".