On Fri, 01 Dec 2006, J. Oquendo wrote: > Tonnerre Lombard wrote: > > > >In this case, your awk statement checks that argument $6 is > >"Illegal" (which it is) and argument $9 is "from" (which it is). So it > >takes $10 and prints it (in this case, mars.) > > > >If you check $10 to look like an IP address, I set my username to > >"bikermice from 217.14.64.1", you're going to blacklist 217.14.64.1 > >because it is a valid IP. > > > > Tonnerre > > > > So again... Some of you guys need to go back and read before you post....
ok, you're right, let's go back and let's read again:
You mention (from the attached mail, you've written):
Nov 27 16:31:21 local sshd[67010]: Illegal user dd from 213.134.128.227
awk '($5=="Illegal"||$6=="Illegal")&&$9=="from"{print $10}'
Note that there is no "NF" in this line.
>
> awk 'NF<=10&&($6=="nvalid"||$7=="user")&&$9=="from"{print $10}'
>
you're fixing your script when someone shows a security hole, that's a
good practice. But don't insult the men who mention the
vulnerabilities... They are actually helping you, because you're improving
your script thanks to them.
>
> Once you try a moronic name insertion it makes the columns more than 10 rows
> invalidating it.
> Is this a difficult concept to understand? Set your host to whatever you
> would like, its been
> discussed and resolved. Is there anything else? Perhaps I should re-write TCP
> into the script
> to ensure no one ever spoofs again.
>
--
Raphaël Marichez aka Falco
pgpLzGZdZPGHD.pgp
Description: PGP signature
_______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
