Aye, this is true
some time ago we were writting a kind of backdoor working like a normal
shell over the ICMP, and it had an option to establish connection from
inside of network to hostile host.
greets
Bill Rohweder wrote:
>
> Regarding the recent discussion of ICMP threats, other than the
> more obvious ICMP based DoS attacks, keep in mind the possibility
> of a covert channel via ICMP.
>
> Refer to the Phrack article describing "Loki" for more info.
>
> http://www.phrack.com/search.phtml?view&article=p49-6
>
> Regards,
>
> /dev/human
>
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