Howdy all and Merry Christmas !

I recently had someone hack my system (no a big deal as I planned to upgrade
it anyway).
But what they did in attempt to leave a back door I found intriguing.
the following lines in /etc/inetd.conf we added by my unwelcome guest.

telnet stream tcp nowait root /usr/sbin/tcpd in.telnetd
37             stream  tcp     nowait  root    /usr/sbin/sock
/usr/sbin/sock

I'm not entirely sure what this person achieved by these line (comments
welcome !) Is it an attempt to place a root shell on telnet port 37 ?
And what is sock anyhow ?

I suspect this person gained access to my system via ftpd, is this really
such a security hole ?

Thanx

PMc

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