mailing list archives
Re: Setting nmap host_timeout too low may cause DoS on inetd (?)
From: lamont () security hp com (LaMont Jones)
Date: Fri, 17 Mar 2000 16:59:16 -0700 (MST)
BSD derived inetd's have looping control built in. they usually log this,
"looping too fast", via syslog and then halt operations for a bit. it's a
weak form of DoS mitigation, and it works. i don't know the vintage of
HPUX inetd, but is it syslogging anything similar to "looping too fast"?
my HPUX box is unavailable from my location here, so i can't run strings
on it to see if that's built in.
If it's an old enough, unpatched, inetd, then it has problems with looping.
The current inetd for 10.20 says:
% strings -a /usr/sbin/inetd | grep 'looping'
%s: Server failing (looping), service terminated